HAND-HELD POWER TOOL

FIELD OF THE INVENTION

The present invention is to a hand-held power tool.

BACKGROUND INFORMATION

Hand-held power tools, including a drilling hammer and/or a chisel hammer, are believed to be understood.

SUMMARY OF THE INVENTION

The present invention is directed to a hand-held power tool, in particular a drilling hammer and/or chisel hammer, that includes at least one housing, at least one handle, and at least one interface device for establishing an electrical and mechanical connection to at least one rechargeable battery pack.

It is provided that the hand-held power tool includes at least one damping unit that is provided for supporting the at least one handle relative to the at least one housing in a vibration-damped manner, the at least one interface device being situated on the at least one handle. Due to situating the at least one interface device on the at least one handle, in an operating state of the hand-held power tool a preferably low transmission of impacts and vibrations to the at least one rechargeable battery pack that is coupled to the hand-held power tool via the interface device may be achieved in an advantageously simple manner, as the result of which damage to the at least one rechargeable battery pack, in particular wear, caused by the mechanical stress, on electrical contact elements and/or fastening elements for connecting the at least one rechargeable battery pack to the hand-held power tool may advantageously be avoided. In addition, due to situating the at least one interface device on the at least one handle, a preferably good and balanced weight distribution of the hand-held power tool may be achieved, and due to the at least one vibration-damped handle, further components for damping the at least one rechargeable battery pack relative to the housing may be dispensed with.

In the present context, a “hand-held power tool” is understood in particular to mean a machine, in particular a power drill, a drilling hammer, a chisel hammer, a percussion drill, a saw such as a jigsaw or reciprocating saw, a plane, a screwdriver, a milling tool, a grinder, an angle grinder, an orbital sander, a garden tool, and/or a multifunctional tool, that processes a workpiece and is transportable by an operator without a transport machine. The hand-held power tool may have a mass that is in particular less than 40 kg, more preferably less than 10 kg, and particularly preferably less than 5 kg. The housing of the hand-held power tool preferably includes at least two housing shells, and in an installed state forms at least part, which may be at least a large part, of a shell surface of the hand-held power tool that is grippable by an operator of the hand-held power tool. The at least one housing of the hand-held power tool is made at least partially of plastic. In the present context, a “handle” is understood in particular to mean an element that is provided for holding and/or guiding the hand-held power tool. The handle is preferably grippable and/or holdable at least with one hand, and in particular includes at least one control element that is provided in particular for controlling a drive unit of the hand-held power tool. The control element may be configured, for example, as an on/off switch, as an automatic safety switch-off device, and/or as a metering controller for metering an impact energy. In particular, the handle is provided for being completely grasped all around with one hand by an in particular adult operator. A circumference of the handle is preferably 70 mm minimum, more preferably 90 mm minimum, and particularly preferably 110 mm minimum, and/or in particular a maximum of 210 mm, which may be 180 mm, and very particularly preferably 140 mm. The handle is in particular made at least partially of a plastic and/or a rubber material.

The interface device is preferably provided for detachably connecting the at least one rechargeable battery pack to the hand-held power tool. At least one fastening element is advantageously provided for mechanically connecting the at least one rechargeable battery pack to the hand-held power tool. At least one contact element is advantageously provided for electrically connecting the at least one rechargeable battery pack to the hand-held power tool. The at least one interface device preferably includes at least one interface situated on the at least one rechargeable battery pack, at least one interface situated on the hand-held power tool, and/or an exchange interface unit that is detachably coupleable to the at least one rechargeable battery pack and to the hand-held power tool. In the present context, a “rechargeable battery pack” is understood in particular to mean an energy store unit that is provided for being coupleably connected to the hand-held power tool. The rechargeable battery pack is preferably connected to the hand-held power tool via the at least one interface device.

In addition, the rechargeable battery pack is provided in particular for storing electrical energy and supplying at least one electric motor of the hand-held power tool with electrical energy. The at least one electric motor is preferably configured as an EC motor. The rechargeable battery pack in particular includes at least one energy store. The energy store includes at least one accumulator cell, and advantageously includes multiple interconnected accumulator cells. In addition, the rechargeable battery pack in particular includes a, which may be one, housing in which the energy store is situated and which is provided for protecting the energy store.

In the present context, a “damping unit” is understood in particular to mean a unit that is provided for greatly reducing a transmission of an oscillation, of impacts, and/or of a vibration, in particular of and in particular between various units, elements, components, and/or parts of the hand-held power tool. The term “greatly reducing” is understood to mean that the oscillation, the impacts, and/or the vibration that act(s) on a component of the hand-held power tool to be damped, in particular on the at least one handle, is/are reduced by at least 50%, which may be by more than 70%, and particularly preferably by more than 90%, in particular compared to an undamped configuration. A damping rate of oscillations, impacts, and/or vibrations of the at least one damping unit is advantageously settable, in particular by an operator. The at least one damping unit includes in particular at least one, which may be exactly one, and in particular multiple, elastic, damping, and/or resilient damping element(s) that greatly reduce(s) the oscillations, impacts, and/or vibrations acting on at least a portion of the hand-held power tool. The at least one damping element in particular is situated between two portions of the hand-held power tool that are to be damped relative to one another with the aid of the at least one damping unit. An “elastic element” is understood in particular to mean an element which is repeatedly deformable without the element thus being mechanically damaged or destroyed, and which, in particular after a deformation, tends to automatically return to its original shape. The at least one damping element may be configured as a mechanical, electrical, hydraulic, and/or pneumatic damping element. In particular, the at least one damping unit includes multiple damping elements having different configurations. The at least one damping element is preferably a toggle lever, a leaf spring, a compression spring, a foam part, and/or a rubber part.

In the present context, “provided” is understood in particular to mean specially configured, configured, and/or equipped. Providing an object for a certain function is understood in particular to mean that the object meets and/or carries out this certain function in at least one use state and/or operating state.

Moreover, it is provided that the at least one interface device includes at least one exchange interface unit that is configured to be detachably connectable to the at least one rechargeable battery pack and to the at least one handle, and/or to the at least one rechargeable battery pack and to the at least one housing. In this way, exchange interface units having different configurations may be coupled to the hand-held power tool, as the result of which the hand-held power tool may advantageously be easily retrofitted, for example, for different applications, in particular for connection to different rechargeable battery packs, for example for connection to an 18-V rechargeable battery pack and to a 36-V rechargeable battery pack.

In the present context, “detachable” is understood in particular to mean “nondestructively separable.” The exchange interface unit is preferably configured to be exchangeably connectable to the at least one rechargeable battery pack and to the at least one handle, and/or to the at least one rechargeable battery pack and to the at least one housing. The at least one interface device particularly preferably includes at least two exchange interface units, which may behaving at least partially different configurations, which are alternatively coupleable to the hand-held power tool. The at least one exchange interface unit is particularly preferably configured to be detachably connectable to the at least one rechargeable battery pack and to the at least one, in particular vibration-damped, handle. The exchange interface unit is preferably fastenable to the at least one handle and/or to the housing of the hand-held power tool with the aid of at least one fastening element. The at least one fastening element is preferably configured as a screw, clamping element, clip, or detent hook, or in some other way that appears meaningful to those skilled in the art. The at least one exchange interface unit is particularly preferably configured to be detachably connectable to the at least one rechargeable battery pack and to the at least one handle, and/or to the at least one rechargeable battery pack and to the at least one housing, without the use of tools. The at least one fastening element may be situated on the at least one handle or on the housing of the hand-held power tool and/or on the at least one rechargeable battery pack.

A hand-held power tool, in particular a drilling hammer and/or chisel hammer, that includes at least one housing, at least one handle, and at least one interface device for establishing an electrical and mechanical connection to at least one rechargeable battery pack is preferably conceivable, the at least one interface device including at least one exchange interface unit that is configured to be detachably connectable to the at least one rechargeable battery pack and to the at least one handle, and/or to the at least one rechargeable battery pack and to the at least one housing, which represents an alternative to the embodiment of the hand-held power tool described herein.

Furthermore, it is provided that the hand-held power tool includes at least one safety release unit for automatically releasing the fastening of the at least one exchange interface unit and/or of the at least one rechargeable battery pack when a limiting value of at least one safety parameter is exceeded. In particular, damage to the at least one rechargeable battery pack coupled to the hand-held power tool, for example if the hand-held power tool drops, may thus be avoided.

In the present context, “automatic” is understood in particular to mean an active intervention that is at least essentially, which may be completely, independent of the operator. In the present context, a “safety parameter” is understood in particular to mean a parameter that is relevant at least for avoiding damage to the hand-held power tool and/or to the rechargeable battery pack, or injury to the operator. The at least one safety parameter is preferably formed by a force that acts on the at least one rechargeable battery pack that is coupled to the hand-held power tool, and/or on the interface device. The limiting value of the at least one safety parameter is exceeded in particular if the hand-held power tool drops.

A hand-held power tool, in particular a drilling hammer and/or chisel hammer, that includes at least one housing, at least one handle, and at least one interface device for establishing an electrical and mechanical connection to at least one rechargeable battery pack, and that includes at least one safety release unit for automatically releasing the fastening of the at least one exchange interface unit and/or of the at least one rechargeable battery pack when a limiting value of at least one safety parameter is exceeded, is conceivable which represents an alternative to the embodiment of the hand-held power tool described herein.

In addition, it is provided that the hand-held power tool includes at least one rechargeable battery damping unit for supporting at least a portion of the at least one interface device in a vibration-damped manner. A preferably low transmission of impacts and vibrations to the at least one rechargeable battery pack in an operating state of the hand-held power tool may thus be achieved with a simple configuration, and damage to the at least one rechargeable battery pack, in particular wear, caused by the mechanical stress, on electrical contact elements and/or fastening elements for connecting the at least one rechargeable battery pack to the hand-held power tool may advantageously be avoided.

In the present context, a “rechargeable battery damping unit” is understood in particular to mean a unit that is provided for greatly reducing a transmission of an oscillation, of impacts, and/or of a vibration, in particular of and in particular between the hand-held power tool and the rechargeable battery pack that is coupled to the hand-held power tool. The term “greatly reducing” is understood to mean that the oscillation, the impacts, and/or the vibration that act(s) on the at least one rechargeable battery pack, in particular via the at least one interface device, is/are reduced by at least 50%, which may be by more than 70%, and particularly preferably by more than 90%, in particular compared to an undamped configuration.

The at least one rechargeable battery damping unit includes in particular at least one, which may be exactly one, and in particular multiple, elastic, damping, and/or resilient damping element(s) that greatly reduce(s) the oscillations, impacts, and/or vibrations. The at least one damping element is in particular situated between the hand-held power tool, in particular the at least one handle of the hand-held power tool, and the at least one interface device. An “elastic element” is understood in particular to mean an element which is repeatedly deformable without the element thus being mechanically damaged or destroyed, and which in particular after a deformation tends to automatically return to its original shape. The at least one damping element may be configured as a mechanical, electrical, hydraulic, and/or pneumatic damping element. The at least one damping element may be formed by a spring, an elastomeric, rubber, and/or foam element, a linear decoupling, or in some other way that appears meaningful to those skilled in the art.

In addition, it is provided that the hand-held power tool includes at least one rechargeable battery pack that is at least partially electrically and mechanically coupleable to the at least one interface device, a combined mass of the at least one handle and of the at least one rechargeable battery pack being at least ⅛ of a total hand-held power tool mass. A preferably good and balanced weight distribution of the hand-held power tool may thus be achieved due to situating the at least one interface device on the at least one handle.

The combined mass of the at least one rechargeable battery pack and of the at least one handle is in particular at least ¼, which may be at least ⅓, and particularly preferably ½ of the total hand-held power tool mass. The at least one handle and the at least one rechargeable battery pack may particularly preferably be provided as an absorption mass.

Furthermore, it is provided that the at least one interface device includes at least one auxiliary function unit that provides an auxiliary function in addition to the electrical and mechanical coupling to at least one rechargeable battery pack. A preferably broad application area and advantageously flexible usability of the hand-held power tool may thus be achieved.

The at least one auxiliary function unit is preferably configured, at least in part, to be fixedly connected to the at least one exchange interface unit. The at least one auxiliary function unit may be configured as an operating hours counter, as a mounting, for example for a lighting unit such as a flashlight, for at least one sensor and/or for a smart phone, as a suction unit, as a control unit, in particular as an HMI interface, as an illumination unit, as a measuring device, for example as a laser distance meter for depth measurement, or as a line laser, and/or in some other way that appears meaningful to those skilled in the art. It is also conceivable for the at least one interface device to include at least two auxiliary function units which have configurations that are at least partially different, and which in particular are alternatively coupleable to the hand-held power tool. It is conceivable for the at least one auxiliary function unit to be situatable on the housing, on the handle, on a housing cover, and/or at some other location on the hand-held power tool that appears meaningful to those skilled in the art. The at least one auxiliary function unit is particularly preferably situatable on the hand-held power tool in a vibration-damped manner. The hand-held power tool may thus be retrofitted, for example, for different applications, using a simple configuration.

In addition, it is provided that the hand-held power tool includes at least one absorption unit that is at least partially situated on the interface device. Good oscillation damping may advantageously be achieved in this way.

In the present context, an “absorption unit” is understood in particular to mean a unit which includes at least one absorption mass that is provided for generating, in an operating state of the hand-held power tool, a counter-oscillation with respect to the oscillations and vibrations generated by the hand-held power tool, and compensating for the oscillations and vibrations generated by the hand-held power tool. The at least one absorption unit preferably includes at least one absorption mass that is preferably formed, at least partially, by the at least one rechargeable battery pack and/or by the at least one handle.

Moreover, it is provided that the at least one safety release unit includes at least one release element having an at least partially elastic configuration. A cost-effective embodiment of the at least one safety release unit may thus be achieved with a simple configuration.

The term “elastic” is understood in particular to mean that the at least one release element is repeatedly deformable without the release element thus being mechanically damaged or destroyed, and that the at least one release element, in particular after a deformation, tends to automatically return to its original shape. The at least one release element may be configured, at least in part, as a spring, in particular as a leaf spring, as an elastic subarea on the housing of the hand-held power tool and/or the at least one exchange interface unit, as a wall thickness of the housing of the hand-held power tool that is reduced, at least in areas, as a predetermined breaking point on the housing of the hand-held power tool and/or on the at least one exchange interface unit, as a magnet, or in some other way that appears meaningful to those skilled in the art. Arbitrary combinations of release elements having different configurations, which appear meaningful to those skilled in the art, are also conceivable. The at least one release element in particular may be configured, at least in part, in one piece with at least one mechanical fastening element and/or with at least one electrical contact element.

Furthermore, it is provided that the hand-held power tool includes at least one adjustment unit for adjusting at least one damping parameter of the at least one damping unit. An advantageously high level of operator comfort and a preferred adaptation to different applications, to different operator preferences, and/or to the at least one rechargeable battery pack coupled to the hand-held power tool may be achieved in this way.

The at least one adjustment unit is provided in particular for adjusting at least one damping parameter of the at least one damping unit, which may be by the operator of the hand-held power tool. The at least one adjustment unit preferably includes at least one control element that is provided for actuation, in particular manual actuation, by the operator for adjusting the damping parameter. The damping parameter is preferably formed by a spring constant, a strength, a tension, and/or a pressure, in particular of the at least one damping element of the at least one damping unit. The at least one adjustment unit is provided for a mechanical or electronic adjustment.

In addition, an exchange interface unit for the hand-held power tool is provided. The hand-held power tool may thus be retrofitted in an advantageously easy manner, for example for different applications, in particular for connection to different rechargeable battery packs, for example for connection to an 18-V rechargeable battery pack and to a 36-V rechargeable battery pack, and/or for connection to different auxiliary function units.

The hand-held power tool according to the present invention is not intended to be limited to the use and specific embodiment described above. In particular, for meeting a mode of operation described herein, the hand-held power tool according to the present invention may include a number of individual elements, components, and units that differ from the number stated herein.

Further advantages result from the following description of the drawings. Multiple exemplary embodiments of the present invention are illustrated in the drawings. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also advantageously consider the features individually and combine them into further meaningful combinations.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a hand-held power tool according to the present invention including an installed rechargeable battery pack, in a schematic side view.

FIG. 2 shows a detail of the hand-held power tool in the area of the installed rechargeable battery pack.

FIG. 3 shows an alternative embodiment of the hand-held power tool including an installed rechargeable battery pack, in a schematic side view.

FIG. 4 shows another alternative embodiment of the hand-held power tool including an installed rechargeable battery pack, in a schematic side view.

FIG. 5 shows another alternative embodiment of the hand-held power tool including an interface device, in a schematic side view.

FIG. 6 shows another alternative embodiment of the hand-held power tool including an interface device, in a schematic side view.

FIG. 7 shows another alternative embodiment of the hand-held power tool including an interface device, in a schematic side view.

FIG. 8 shows a detail of another alternative embodiment of the hand-held power tool including an interface device, in a schematic side view.

FIG. 9 shows a detail of another alternative embodiment of the hand-held power tool including an interface device, in a schematic side view.

FIG. 10 shows a detail of another alternative embodiment of the hand-held power tool including an interface device, in a schematic side view.

FIG. 11 shows a detail of another alternative embodiment of the hand-held power tool including an interface device, in a schematic side view.

DETAILED DESCRIPTION

A hand-held power tool 10a is schematically illustrated in FIG. 1. Hand-held power tool 10a is configured as a hand-held electric power tool. Hand-held power tool 10a is configured as a rechargeable battery hand-held power tool. Hand-held power tool 10a is formed by a drilling hammer and/or chisel hammer. However, other embodiments of hand-held power tool 10a that appear meaningful to those skilled in the art are also conceivable. Hand-held power tool 10a includes a tool holder 36a that is provided for accommodating an insertion tool. Tool holder 36a is configured as a quick-change tool holder. Hand-held power tool 10a also includes a handle 14a for guiding hand-held power tool 10a by an operator. Handle 14a is situated on a side of hand-held power tool 10a facing away from tool holder 36a, viewed along a machining axis. Handle 14a is configured as a U-shaped bow-type handle. It is also conceivable for hand-held power tool 10a to additionally include an auxiliary handle, which may be configured as a bar-shaped handle, for example. Hand-held power tool 10a includes a drive unit for driving, in an operating state, an insertion tool that is fastened in tool holder 36a, and a housing 12a. Housing 12a is formed by two housing shells. However, other embodiments of housing 12a that appear meaningful to those skilled in the art are also conceivable.

Hand-held power tool 10a also includes a damping unit 20a that is provided for supporting handle 14a relative to housing 12a in a vibration-damped manner. Damping unit 20a includes at least one damping element 38a that is situated, at least partially, between handle 14a and housing 12a of hand-held power tool 10a. Damping unit 20a includes one damping element 38a. However, it is also conceivable for damping unit 20a to include some other, arbitrary number of damping elements 38a. Damping element 38a is made of an elastomer and has an elastically deformable configuration. Damping element 38a is made of rubber. Damping element 38a is connected to housing 12a and to handle 14a. Handle 14a is connected to housing 12a via damping element 38a. However, other embodiments of damping element 38a that appear meaningful to those skilled in the art, for example made of foam, as a spring element, in particular as a leaf spring or as a coil compression spring, as a toggle lever, as a swivel joint, as a linear bearing, as a hydraulic element, or as any arbitrary combination, are also conceivable.

Hand-held power tool 10a also includes at least one interface device 16a for establishing an electrical and mechanical connection to the at least one rechargeable battery pack 18a. Hand-held power tool 10a includes one interface device 16a that is provided for electrically and mechanically connecting a rechargeable battery pack 18a to hand-held power tool 10a. Hand-held power tool 10a includes one interface device 16a. However, it is also conceivable for hand-held power tool 10a to include more than one interface device 16a, and in particular for coupling hand-held power tool 10a, to more than one rechargeable battery pack 18a. Interface device 16a is situated on handle 14a. Interface device 16a is provided for detachably connecting rechargeable battery pack 18a to handle 14a. Rechargeable battery pack 18a is exchangeably connectable to hand-held power tool 10a via interface device 16a. Rechargeable battery pack 18a, in a fastened state to hand-held power tool 10a via interface device 16a, is provided for supplying hand-held power tool 10a with electrical energy.

Interface device 16a includes at least one contact element, not illustrated, for electrically coupling hand-held power tool 10a to rechargeable battery pack 18a. Interface device 16a includes two contact elements. However, some other number of contact elements is also conceivable. The contact elements of interface device 16a have a configuration that corresponds to contact elements of rechargeable battery pack 18a. The contact elements of interface device 16a are made of metal. The contact elements are electrically connected to an electronics unit of hand-held power tool 10a. Interface device 16a also includes at least one coupling unit 40a that is provided for mechanically coupling hand-held power tool 10a to rechargeable battery pack 18a. Interface device 16a includes one coupling unit 40a. However, multiple coupling units 40a are also conceivable. Coupling unit 40a includes at least one fastening element 42a. Coupling unit 40a includes two fastening elements 42a. However, some other number of fastening elements 42a is also conceivable. Fastening elements 42a are provided for form-fit fastening to housing 12a. Fastening elements 42a are provided for form-fit fastening of rechargeable battery pack 18a. Fastening elements 42a each have a half-shell configuration. Fastening elements 42a have a corresponding configuration. Fastening elements 42a are connectable to one another via at least one screw. However, other embodiments of fastening elements 42a that appear meaningful to those skilled in the art are also conceivable.

Hand-held power tool 10a includes at least one rechargeable battery damping unit 26a for supporting at least a portion of interface device 16a in a vibration-damped manner. Hand-held power tool 10a includes a rechargeable battery damping unit 26a for supporting interface device 16a in a vibration-damped manner. Rechargeable battery damping unit 26a includes at least one rechargeable battery damping element 44a. Rechargeable battery damping unit 26a includes two rechargeable battery damping elements 44a. However, some other number of rechargeable battery damping elements 44a is also conceivable. Rechargeable battery damping elements 44a in an installed state are each situated between handle 14a of hand-held power tool 10a and interface device 16a. Rechargeable battery damping elements 44a are each made of an elastomer. Rechargeable battery damping elements 44a in an installed state rest directly against handle 14a of hand-held power tool 10a and against fastening elements 42a of coupling unit 40a of interface device 16a. Rechargeable battery damping elements 44a are fixedly connected to handle 14a of hand-held power tool 10a. Rechargeable battery damping elements 44a are integrally joined to handle 14a of hand-held power tool 10a. Rechargeable battery damping elements 44a are molded onto handle 14a of hand-held power tool 10a. However, it is also conceivable for rechargeable battery damping elements 44a to be joined to handle 14a in some other way that appears meaningful to those skilled in the art, such as by an adhesive bond.

For installing coupling unit 40a, fastening elements 42a are placed on handle 14a around the side of rechargeable battery damping elements 44a of rechargeable battery damping unit 26a, viewed along a direction perpendicular to the machining axis of hand-held power tool 10a, so that fastening elements 42a in an installed state enclose rechargeable battery damping elements 44a. For this purpose, fastening elements 42a each have a receiving area that is provided for accommodating one of the rechargeable battery damping elements 44a in a form-fit manner. Rechargeable battery damping elements 44a each have a C-shaped cross section, and in an installed state enclose a projection that is molded onto handle 14a. Fastening elements 42a each have a C-shaped cross section, and in an installed state enclose rechargeable battery damping elements 44a of rechargeable battery damping unit 26a. Fastening elements 42a are subsequently fixed by screwing to one another, and are thus fastened in a form-fit manner to handle 14a via rechargeable battery damping elements 44a. Alternatively, it is also conceivable for fastening elements 42a to be integrally joined to one another, for example by an adhesive bond, or by a detent and/or plug-in connection, or in some other way that appears meaningful to those skilled in the art. For fastening rechargeable battery pack 18a to hand-held power tool 10a, fastening elements 42a of coupling unit 40a each include a projection 46a, which in an installed state engages in a form-fit manner with a recess that is introduced into rechargeable battery pack 18a. Fastening elements 42a engage with the recesses at opposite sides of rechargeable battery pack 18a.

In an installed state, rechargeable battery pack 18a is supported relative to handle 14a in a vibration-damped manner via rechargeable battery damping unit 26a. In addition, rechargeable battery pack 18a in an installed state is supported relative to housing 12a of hand-held power tool 10a in a vibration-damped manner via damping unit 20a. In an operating state of hand-held power tool 10a, a transmission of oscillations and vibrations from hand-held power tool 10a to rechargeable battery pack 18a is thus largely avoided. A combined mass of rechargeable battery pack 18a and of handle 14a is at least ⅛ of a total hand-held power tool mass. The combined mass of rechargeable battery pack 18a and of handle 14a is at least ¼ of a total hand-held power tool mass. The combined mass of rechargeable battery pack 18a and of handle 14a is at least ⅓ of a total hand-held power tool mass. The combined mass of rechargeable battery pack 18a and of handle 14a is ½ of a total hand-held power tool mass.

Further exemplary embodiments of the present invention are shown in FIGS. 3 through 11. The following descriptions and the drawings are limited essentially to the differences between the exemplary embodiments, whereby in principle, with regard to identically denoted components, in particular with regard to components having identical reference numerals, reference may also be made to the drawings and/or the description of the other exemplary embodiments, in particular in FIGS. 1 and 2. To distinguish between the exemplary embodiments, the letter a is added as a suffix to the reference numerals in the exemplary embodiment in FIGS. 1 and 2. The letter a is replaced by the letters b through j in the exemplary embodiments in FIGS. 3 through 11.

FIG. 3 shows one alternative embodiment of hand-held power tool 10b, including a rechargeable battery pack 18b that is installed via an interface device 16b having an alternative embodiment. Rechargeable battery pack 18b corresponds in large part to rechargeable battery pack 18a already described. Hand-held power tool 10b corresponds in large part to hand-held power tool 10a already described. Hand-held power tool 10b includes a handle 14b for guiding hand-held power tool 10b by an operator. Handle 14b is configured as a U-shaped bow-type handle. Handle 14b is supported on two areas of a housing 12b of hand-held power tool 10b. Hand-held power tool 10b also includes a damping unit 20b that is provided for supporting handle 14b relative to housing 12b in a vibration-damped manner. Damping unit 20b includes at least one damping element 38b that is situated, at least partially, between handle 14b and housing 12b of hand-held power tool 10b. Damping unit 20b includes two damping elements 38b. However, it is also conceivable for damping unit 20b to include some other, arbitrary number of damping elements 38b. One of damping elements 38b is formed by a leaf spring, and the other of damping elements 38b is configured as a toggle lever. Damping elements 38b are schematically illustrated, and may also have a different configuration that appears meaningful to those skilled in the art, for example made of an elastomer, in particular of rubber, of foam, or configured as a spring element, in particular as a coil spring, as a swivel joint, as a linear bearing, as a hydraulic element, or as any arbitrary combination. Damping elements 38b are connected to housing 12b and to handle 14b. Handle 14b is connected to housing 12b via damping elements 38b.

Hand-held power tool 10b includes interface device 16b, which corresponds to interface device 16a already described. Interface device 16b is situated on handle 14b. Interface device 16b is provided for detachably connecting rechargeable battery pack 18b to handle 14b. Rechargeable battery pack 18b is exchangeably connectable to hand-held power tool 10b via interface device 16b. Interface device 16b includes two contact elements, not illustrated, for electrically coupling hand-held power tool 10b to rechargeable battery pack 18b. The contact elements of interface device 16b have a configuration that corresponds to contact elements of rechargeable battery pack 18b. Interface device 16b is provided for movably supporting rechargeable battery pack 18b on handle 14b. Interface device 16b includes a linear bearing for displaceably supporting rechargeable battery pack 18b on handle 14b. Hand-held power tool 10b also includes at least one absorption unit 30b that is at least partially situated on interface device 16b. Hand-held power tool 10b includes one absorption unit 30b. However, hand-held power tool 10b may also include multiple absorption units 30b. Absorption unit 30b is provided for absorption of vibrations by at least one movably situated absorption mass. Rechargeable battery pack 18b in an installed state forms the absorption mass.

FIG. 4 shows another alternative embodiment of hand-held power tool 10c, including a rechargeable battery pack 18c that is installed via an interface device 16c having another alternative embodiment. Hand-held power tool 10c and rechargeable battery pack 18c correspond in large part to hand-held power tool 10a already described, and of rechargeable battery pack 18a already described. Hand-held power tool 10c includes a handle 14c for guiding hand-held power tool 10c by an operator. In addition, hand-held power tool 10c includes interface device 16c that is provided for mechanically and electrically coupling rechargeable battery pack 18c to hand-held power tool 10c. Interface device 16c is situated on handle 14c. Interface device 16c includes an intermediate housing 48c that is situated between handle 14c and a housing 12c of hand-held power tool 10c. Handle 14c is coupled to housing 12c of hand-held power tool 10c, on the one hand via a damping element 38c of a damping unit 20c, and on the other hand via a rechargeable battery damping unit 26c and intermediate housing 48c of interface device 16c.

Damping element 38c of damping unit 20c is made of an elastomer and is elastically deformable. Damping element 38c is fixedly connected to housing 12c of hand-held power tool 10c and to handle 14c. Damping element 38c is integrally joined to housing 12c of hand-held power tool 10c and to handle 14c. Rechargeable battery damping unit 26c includes two rechargeable battery damping elements 44c. However, it is also conceivable for rechargeable battery damping unit 26c to have some other, arbitrary number of rechargeable battery damping elements 44c. Rechargeable battery damping elements 44c are made of an elastomer. One of rechargeable battery damping elements 44c is situated between handle 14c and intermediate housing 48c, and the other of rechargeable battery damping elements 44c is situated between intermediate housing 48c and housing 12c of hand-held power tool 10c. Intermediate housing 48c is fixedly connected to handle 14c and to housing 12c of hand-held power tool 10c via rechargeable battery damping unit 26c. Intermediate housing 48c is integrally joined to handle 14c via rechargeable battery damping unit 26c and to housing 12c of hand-held power tool 10c. Intermediate housing 48c forms an interface for detachably and exchangeably fastening rechargeable battery pack 18c. Intermediate housing 48c is made of plastic.

Hand-held power tool 10c also includes at least one adjustment unit 34c for adjusting at least one damping parameter of damping unit 20c. Hand-held power tool 10c includes one adjustment unit 34c. However, it is also conceivable for hand-held power tool 10c to include some other, arbitrary number of adjustment units 34c. Adjustment unit 34c is provided for adjusting the damping parameter by the operator of hand-held power tool 10c. Adjustment unit 34c includes at least one control element that is provided for being actuated by the operator for adjusting the damping parameter. Adjustment unit 34c includes one control element. However, multiple control elements are also conceivable. The control element of adjustment unit 34c is formed by a rotary knob. However, other embodiments of the control element that appear meaningful to those skilled in the art, such as a configuration as a slider, as a keypad, or as a touchpad, are also conceivable. Adjustment unit 34c is provided for mechanically adjusting the damping parameter. However, it is also conceivable for adjustment unit 34c to be provided for electronically adjusting the damping parameter, for example via an electronics unit of hand-held power tool 10c.

FIG. 5 shows another alternative embodiment of hand-held power tool 10d. Hand-held power tool 10d corresponds in large part to hand-held power tool 10a already described. Hand-held power tool 10d includes an interface device 16d that is provided for establishing an electrical and mechanical connection to a rechargeable battery pack 18d. Interface device 16d includes at least one exchange interface unit 22d that is configured to be detachably connectable to rechargeable battery pack 18d and to a handle 14d of hand-held power tool 10d, and/or to rechargeable battery pack 18d and to a housing 12d of hand-held power tool 10d. Interface device 16d includes one exchange interface unit 22d that is configured to be detachably connectable to rechargeable battery pack 18d and to a housing 12d of hand-held power tool 10d. However, interface device 16d may also include some other number of exchange interface units 22d that appears meaningful to those skilled in the art. Exchange interface unit 22d is provided for electrically and mechanically coupling rechargeable battery pack 18d to hand-held power tool 10d. Exchange interface unit 22d is exchangeably fastened to housing 12d of hand-held power tool 10d.

Exchange interface unit 22d includes at least one contact element, not illustrated, for electrically contacting at least one corresponding contact element of hand-held power tool 10d. Exchange interface unit 22d includes two contact elements for electrically contacting two contact elements of hand-held power tool 10d. However, some other number of contact elements is also conceivable. The contact elements of hand-held power tool 10d and the contact elements of exchange interface unit 22d are made of metal. Exchange interface unit 22d includes at least one further contact element, likewise not illustrated, for electrically contacting at least one corresponding contact element of rechargeable battery pack 18d. Exchange interface unit 22d includes two further contact elements for electrically contacting two contact elements of rechargeable battery pack 18d. However, some other number of contact elements is also conceivable. The contact elements of rechargeable battery pack 18d and the further contact elements of exchange interface unit 22d are made of metal. In an installed state, exchange interface unit 22d electrically connects hand-held power tool 10d to rechargeable battery pack 18d.

Interface device 16d also includes at least one coupling unit 40d that is provided for mechanically coupling exchange interface unit 22d to hand-held power tool 10d, and/or exchange interface unit 22d to rechargeable battery pack 18d. Interface device 16d includes one coupling unit 40d. However, multiple coupling units 40d are also conceivable. Coupling unit 40d is provided for detachably fastening exchange interface unit 22d to hand-held power tool 10d, and/or exchange interface unit 22d to rechargeable battery pack 18d. Coupling unit 40d includes at least one fastening element 42d. Coupling unit 40d includes two fastening elements 42d for mechanically fastening exchange interface unit 22d to housing 12d of hand-held power tool 10d. However, a different number of fastening elements 42d is also conceivable. Fastening elements 42d are each configured as a screw. In an installed state of exchange interface unit 22d, fastening elements 42d configured as screws each extend through a recess that is introduced into exchange interface unit 22d, and are each screwed into a thread provided on housing 12d of hand-held power tool 10d. A head area of fastening elements 42d configured as screws in each case rests against exchange interface unit 22d on a side facing away from housing 12d of hand-held power tool 10d, and thus prevents exchange interface unit 22d from slipping out of place relative to housing 12d of hand-held power tool 10d.

In an installed state of exchange interface unit 22d, rechargeable battery pack 18d may be mounted on exchange interface unit 22d. For mounting rechargeable battery pack 18d on exchange interface unit 22d, rechargeable battery pack 18d is coupled to at least one further fastening element, not illustrated, of coupling unit 40d that is situated on exchange interface unit 22d. The at least one further fastening element may be formed by a track, a detent element, a screw element, and/or in some other way that appears meaningful to those skilled in the art.

Interface device 16d also includes at least one auxiliary function unit 28d that provides an auxiliary function in addition to the electrical and mechanical coupling to rechargeable battery pack 18d. Interface device 16d includes one auxiliary function unit 28d. However, it is also conceivable for interface device 16d to include multiple auxiliary function units 28d which in particular have different configurations.

Auxiliary function unit 28d is configured as an operating hours counter. Alternatively or additionally, auxiliary function unit 28d may be configured as a mounting, for example for a lighting unit, in particular for a flashlight, as a suction unit, as a control unit, in particular as an HMI interface, and/or in some other way that appears meaningful to those skilled in the art. Auxiliary function unit 28d is electrically and mechanically connectable to hand-held power tool 10d via exchange interface unit 22d.

Exchange interface unit 22d may be replaced by some other exchange interface unit, not illustrated, which likewise corresponds to the contact elements of hand-held power tool 10d. Exchange interface unit 22d and the other exchange interface unit correspond to one another in large part. Exchange interface unit 22d and the other exchange interface unit are provided for corresponding to different rechargeable battery packs 18d. Hand-held power tool 10d may thus be easily retrofitted for coupling to different rechargeable battery packs 18d. Alternatively or additionally, auxiliary function unit 28d may be exchanged along with exchange interface unit 22d, so that hand-held power tool 10d may be easily retrofitted for different applications.

FIG. 6 shows a hand-held power tool 10e already described, and illustrated in FIG. 5, including an interface device 16e having an alternative embodiment. Interface device 16e includes an exchange interface unit 22e that is configured to be detachably connectable to a rechargeable battery pack 18e and to a housing 12e of hand-held power tool 10e. Exchange interface unit 22e is provided for electrically and mechanically coupling rechargeable battery pack 18e to hand-held power tool 10e. Exchange interface unit 22e is exchangeably fastenable to housing 12e of hand-held power tool 10e. Interface device 16e differs from interface device 16d, already described, solely in the fastening of exchange interface unit 22e to housing 12e of hand-held power tool 10e.

Interface device 16e includes a coupling unit 40e that is provided for mechanically coupling exchange interface unit 22e to hand-held power tool 10e. Coupling unit 40e is provided for detachably fastening exchange interface unit 22e to hand-held power tool 10e, and exchange interface unit 22e to rechargeable battery pack 18e. Coupling unit 40e includes two fastening elements 42e′, 42e″ for mechanically fastening exchange interface unit 22e to housing 12e of hand-held power tool 10e. However, a different number of fastening elements 42e is also conceivable. One of fastening elements 42e′ is configured as a screw. In an installed state of exchange interface unit 22e, fastening element 42e′ configured as a screw extends through a recess that is introduced into exchange interface unit 22e, and is screwed into a thread that is provided on housing 12e of hand-held power tool 10e. A head area of fastening element 42e′ configured as a screw rests against exchange interface unit 22e on a side facing away from housing 12e of hand-held power tool 10e, and thus prevents exchange interface unit 22e from slipping out of place relative to housing 12e of hand-held power tool 10e. The other of fastening elements 42e″ is formed by a projection that is situated on exchange interface unit 22e, and which in an installed state of exchange interface unit 22e engages with a hook element 50e, having a corresponding configuration, situated on housing 12e of hand-held power tool 10e. For installation, in a first step, fastening element 42e″ which is configured as a projection is suspended in hook element 50e situated on housing 12e of hand-held power tool 10e.

Exchange interface unit 22e is subsequently fixed to housing 12e of hand-held power tool 10e via fastening element 42e′ configured as a screw.

FIG. 7 shows a hand-held power tool 10f already described, and illustrated in FIG. 5, including a further interface device 16f having an alternative embodiment. Interface device 16f differs from interface device 16d, already described, solely in the fastening of an exchange interface unit 22f to a housing 12f of hand-held power tool 10f. Interface device 16f includes a coupling unit 40f that is provided for mechanically coupling exchange interface unit 22f to hand-held power tool 10f. Coupling unit 40f is provided for detachably fastening exchange interface unit 22f to hand-held power tool 10f. Coupling unit 40f includes two fastening elements 42f′, 42f″ for mechanically fastening exchange interface unit 22f to housing 12f of hand-held power tool 10f. However, a different number of fastening elements 42f is also conceivable. Fastening elements 42f′, 42f″ of coupling unit 40f are formed by corresponding tracks. One of fastening elements 42f′ is situated on exchange interface unit 22f, and the other of fastening elements 42f″ is situated on housing 12f of hand-held power tool 10f. For installing exchange interface unit 22f on housing 12f of hand-held power tool 10f, exchange interface unit 22f is shifted relative to housing 12f of hand-held power tool 10f, along a machining axis, corresponding fastening elements 42f′, 42f″ being engaged in a form-fit manner and moved relative to one another until reaching an end position. Coupling unit 40f includes a stop, not illustrated, that is provided for delimiting the relative movement of exchange interface unit 22f relative to housing 12f of hand-held power tool 10f and for fixing the end position.

FIG. 8 shows a detail of a hand-held power tool 10g already described, and illustrated in FIG. 5, including a further interface device 16g having an alternative embodiment. Interface device 16g differs from interface device 16d, already described, solely in the fastening of an exchange interface unit 22g to a housing 12g of hand-held power tool 10g. Interface device 16g includes a coupling unit 40g that is provided for mechanically coupling and detachably fastening exchange interface unit 22g to hand-held power tool 10g. Coupling unit 40g includes at least one fastening element 42g. Coupling unit 40g includes two fastening elements 42g. However, a different number of fastening elements 42g is also conceivable. Fastening elements 42g each have a half-shell configuration. Fastening elements 42g are each fastened via a screw to housing 12g of hand-held power tool 10g. In an installed state, each of the screws engages through a recess that is introduced into each of fastening elements 42g, and is screwed into a thread in housing 12g of hand-held power tool 10g. Fastening elements 42g each include a projection 46g that is provided for fastening rechargeable battery pack 18g in a form-fit manner. In an installed state of rechargeable battery pack 18g, projections 46g of fastening elements 42g engage with corresponding recesses that are introduced into housing 12g of rechargeable battery pack 18g, and fix rechargeable battery pack 18g relative to exchange interface unit 22g in a form-fit manner. However, other embodiments of coupling unit 40g and in particular of fastening elements 42g, in particular with regard to a number and/or configuration of projections 46g or recesses, that appear meaningful to those skilled in the art are also conceivable. Exchange interface unit 22g also includes a contact unit for electrically connecting rechargeable battery pack 18g to hand-held power tool 10g in an installed state. The contact unit has a configuration that is known to those skilled in the art, and is not shown here in greater detail.

FIG. 9 shows a detail of a hand-held power tool 10h already described, and illustrated in FIG. 5, including a further interface device 16h having an alternative embodiment. Interface device 16h differs from interface device 16d, already described, solely in the fastening of an exchange interface unit 22h to a housing 12h of hand-held power tool 10h. Exchange interface unit 22h is provided for electrically and mechanically connecting a rechargeable battery pack 18h to hand-held power tool 10h. Hand-held power tool 10h includes at least one safety release unit 24h for automatically releasing the fastening of exchange interface unit 22h and/or of rechargeable battery pack 18h when a limiting value of at least one safety parameter is exceeded. Hand-held power tool 10h includes one safety release unit 24h. However, it is also conceivable for hand-held power tool 10h to include multiple safety release units 24h. Safety release unit 24h is provided for automatically releasing the fastening of exchange interface unit 22h to housing 12h of hand-held power tool 10h, for example if hand-held power tool 10h drops. The safety parameter is formed by a force that acts on the fastening of exchange interface unit 22h to housing 12h of hand-held power tool 10h. However, other embodiments of the safety parameter that appear meaningful to those skilled in the art are also conceivable. Safety release unit 24h includes at least one release element 32h that has an at least partially elastic configuration. Safety release unit 24h includes one release element 32h. However, safety release unit 24h may also include multiple release elements 32h. Release element 32h is formed by a spring. Release element 32h is formed by a leaf spring. Release element 32h also forms a contact element for electrically connecting hand-held power tool 10h to rechargeable battery pack 18h. Release element 32h is situated on housing 12h of hand-held power tool 10h. However, it is also conceivable for release element 32h to be situated on exchange interface unit 22h.

Interface device 16h includes a coupling unit 40h that is provided for mechanically coupling exchange interface unit 22h to hand-held power tool 10h. Coupling unit 40h is provided for detachably fastening exchange interface unit 22h to hand-held power tool 10h, and exchange interface unit 22h to rechargeable battery pack 18h. Coupling unit 40h includes two fastening elements 42h′, 42h″ for mechanically fastening exchange interface unit 22h to housing 12h of hand-held power tool 10h. However, a different number of fastening elements 42h is also conceivable. One of fastening elements 42h′ is formed by a projection which is situated on exchange interface unit 22h, and which in an installed state of exchange interface unit 22h engages with a hook element 50h, having a corresponding configuration, situated on housing 12h of hand-held power tool 10h. The other of fastening elements 42h″ is formed by release element 32h.

For installation, in a first step, fastening element 42h′ configured as a projection is suspended in hook element 50h situated on housing 12h of hand-held power tool 10h. Exchange interface unit 22h is subsequently swiveled until exchange interface unit 22h rests against fastening element 42h″ that is formed by release element 32h. Exchange interface unit 22h is pressed against fastening element 42h″ formed by release element 32h, until fastening element 42h″ formed by release element 32h locks into a corresponding recess situated on exchange interface unit 22h. In the installed state, exchange interface unit 22h is secured against swiveling back, and thus secured relative to housing 12h of hand-held power tool 10h, by an elastic force of fastening element 42h″ that is formed by release element 32h. Rechargeable battery pack 18h is fastened to exchange interface unit 22h in a manner already described. If hand-held power tool 10h drops, fastening element 42h″ that is formed by release element 32h automatically detaches from the corresponding recess in exchange interface unit 22h, as the result of which rechargeable battery pack 18h that is coupled to exchange interface unit 22h is separated from hand-held power tool 10h, which is thus intended to prevent damage to rechargeable battery pack 18h.

FIG. 10 shows a detail of a hand-held power tool 10i already described, and illustrated in FIG. 5, including a further interface device 16i having an alternative embodiment. Interface device 16i differs from interface device 16d, already described, solely in the fastening of an exchange interface unit 22i to a housing 12i of hand-held power tool 10i. Exchange interface unit 22i is provided for electrically and mechanically connecting a rechargeable battery pack 18i to hand-held power tool 10i. Hand-held power tool 10i includes at least one safety release unit 24i for automatically releasing the fastening of exchange interface unit 22i and/or of rechargeable battery pack 18i when a limiting value of at least one safety parameter is exceeded. Safety release unit 24i is provided for automatically releasing the fastening of exchange interface unit 22i on housing 12i of hand-held power tool 10i, for example if hand-held power tool 10i drops. Safety release unit 24i includes at least one release element 32i that has an at least partially elastic configuration. Safety release unit 24i includes two release elements 32i. Release elements 32i are situated on housing 12i of hand-held power tool 10i. However, it is also conceivable for release element 32i to be situated on exchange interface unit 22i. Release elements 32i are fixedly connected to housing 12i of hand-held power tool 10i. Release elements 32i are integrally joined to housing 12i of hand-held power tool 10i. Release elements 32i have a one-piece configuration with housing 12i of hand-held power tool 10i.

Interface device 16i includes a coupling unit 40i that is provided for mechanically coupling exchange interface unit 22i to hand-held power tool 10i. Coupling unit 40i is provided for detachably fastening exchange interface unit 22i to hand-held power tool 10i. Coupling unit 40i includes two fastening elements 42i for mechanically fastening exchange interface unit 22i to housing 12i of hand-held power tool 10i. Fastening elements 42i each have a hook-shaped configuration. Fastening elements 42i are fixedly connected to housing 12i of hand-held power tool 10i. Fastening elements 42i are integrally joined to housing 12i of hand-held power tool 10i. Fastening elements 42i have a one-piece configuration with housing 12i of hand-held power tool 10i.

Fastening elements 42i and release elements 32i have a one-piece configuration. Release elements 32i are formed by an area of housing 12i of hand-held power tool 10i having a reduced material thickness. Hook-shaped fastening elements 42i thus have a configuration that is elastically deflectable for installation and for automatically releasing exchange interface unit 22i.

FIG. 11 illustrates release elements 32j that are formed not from an area of a housing 12j of a hand-held power tool 10j having a reduced material thickness, but, rather, from an elastically deformable material that is integrally joined to housing 12j of hand-held power tool 10j and to fastening elements 42j. Release elements 32j are made of an elastomer. Release elements 32j are configured as a PTE bridge. Release elements 32j are injection-molded onto housing 12j of hand-held power tool 10j and onto each of fastening elements 42j. Release elements 32j connect each of fastening elements 42j to housing 12j of hand-held power tool 10j.

Number	Date	Country	Kind
10 2015 226 406.8	Dec 2015	DE	national
10 2016 205 567.4	Apr 2016	DE	national

HAND-HELD POWER TOOL

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CPC

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