Patent Application
20150158199
There are already known tool coupling devices for receiving a power-tool parting device realized as a closed system, which has at least one cutting-strand tensioning unit that has at least one tensioning element, and which have at least one operating unit comprising at least one operating element.
The invention is based on a tool coupling device, in particular a hand power-tool tool coupling device, for receiving a power-tool parting device realized as a closed system, having at least one cutting-strand tensioning unit that has at least one tensioning element, and having at least one operating unit comprising at least one operating element.
It is proposed that the cutting-strand tensioning unit comprise at least one transmission unit, which is provided to move the tensioning element as a result of an actuation of the operating element of the operating unit. The tensioning element is thus preferably connected to the operating element in a motionally dependent manner, via the transmission unit. “Provided” is to be understood to mean, in particular, specially programmed, designed and/or equipped. The tool coupling device is preferably provided to receive the power-tool parting device in a form-closed and/or force-closed manner, or to fix the power-tool parting device to a main body of the tool coupling device by means of a form-closed and/or by means of a force-closed connection. For the purpose of transmitting driving forces to the power-tool parting device, the power-tool parting device is preferably received by the tool coupling device, or fixed to the main body of the tool coupling device. Particularly preferably, the tool coupling device has at least one holding unit, which is provided to fix the power-tool parting device to the main body in at least one state. The holding unit preferably comprises at least one operating unit. The operating element in this case, at least in one state, preferably exerts a holding force upon the power-tool parting device, in particular in at least one state in which the power-tool parting device has been connected to the tool coupling device. The operating element preferably fixes the power-tool parting device to the main body of the tool coupling device by means of a form-closed and/or by means of a force-closed connection. It is also conceivable, however, for the holding unit to be of another design, considered appropriate by persons skilled in the art. Moreover, the holding unit preferably comprises at least one fixing unit, comprising at least one fixing element provided to fix the operating element in at least one position. Thus, for the purpose of receiving a power-tool parting device, realized as a closed system, the tool coupling device has at least the cutting-strand tensioning unit comprising at least the tensioning element, and has at least the holding unit comprising the operating unit, the cutting-strand tensioning unit comprising at least the transmission unit, which is provided to move the tensioning unit as a result of an actuation of the operating element of the holding unit comprising the operating unit.
The term “cutting-strand tensioning unit” is intended here to define, in particular, a unit provided to exert a tensioning force upon the cutting strand, for the purpose of tensioning, or pretensioning, a cutting strand of the power-tool parting device, at least in a state in which the power-tool parting device has been connected to the tool coupling device. The tensioning element in this case is preferably mounted on the main body of the tool coupling device so as to be movable relative to the main body of the tool coupling device. An “operating unit” is to be understood here to mean, in particular, a unit having at least the operating element, which can be actuated directly by an operator, and which is provided to influence and/or alter a process and/or a state of a unit coupled to the operating unit, through an actuation and/or through an input of parameters. The term “operating element” is intended to define, in particular, an element provided to pick up an input quantity from an operator in the case of an operating action, and in particular to be contacted directly by an operator, contacting of the operating element being sensed and/or an actuating force exerted upon the operating element being sensed and/or being transferred mechanically for the purpose of actuating a unit, in particular the transmission unit.
A “transmission unit” is to be understood here to mean, in particular, a mechanical mechanism by means of which at least one movement quantity of at least one component, such as, for example, a movement type (rotation, translation, etc.), a movement path, a movement speed and/or an acceleration can be altered. Preferably, the transmission unit is provided to step up and/or step down a force and/or a torque and/or to convert a movement type, such as, for example, conversion of a rotational movement of one component into a translational movement of another component. Particularly preferably, the transmission unit is provided for converting movement, or changing a movement type, between the operating element and the tensioning element. The transmission unit in this case may be realized as an eccentric mechanism, as a lever mechanism, as a cam mechanism, as a screw mechanism, etc. Advantageously, the design according to the invention makes it possible to achieve a tool coupling device that is easy to operate. Advantageously, by means of the cutting-strand tensioning unit, an automatic tensioning operation can be realized by actuation of the operating element.
Furthermore, it is proposed that the operating element be mounted such that it can be swiveled about an axis of motion of the operating element that is at least substantially parallel to a plane of main extent of the operating element. “Substantially parallel” is to be understood here to mean, in particular, an alignment of a direction relative to a reference direction, in particular in one plane, the direction deviating from the reference direction by, in particular, less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. The term “plane of main extent” is intended here to define, in particular, a plane in which the operating element has a maximum extent. Preferably in this case, the operating element can be swiveled by a swivel angle that, in particular, is greater than 5°, preferably greater than 45°, and particularly preferably greater than 75°. Preferably, the plane of main extent of the operating element, in an operating element swiveled fully into an open position, is at least substantially parallel to a rotation axis of a drive element that is mounted in a rotatable manner in the main body of the tool coupling device. Preferably in this case, the axis of motion of the operating element is at least substantially perpendicular to a rotation axis of a drive element of the tool coupling device, or of a portable power tool comprising the tool coupling device, that is mounted in a rotatable manner in the main body of the tool coupling device. The expression “substantially perpendicular” is intended here to define, in particular, an alignment of a direction relative to a reference direction, wherein the direction and the relative direction, in particular as viewed in one plane, enclose an angle of 90° and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. Advantageously, a lever principle may be used to generate a tensioning force. Thus, advantageously, the tool coupling device according to the invention can be made easy to operate, with only a small amount of force being required, advantageously, to move the operating element, or the tensioning element.
In an alternative design of the tool coupling device according to the invention, it is proposed that the operating element be mounted such that it can rotate about an axis of motion of the operating element that is at least substantially perpendicular to a plane of main extent of the operating element. Preferably, the plane of main extent of the operating element is at least substantially perpendicular to the rotation axis of the drive element. Advantageously, the design according to the invention makes it possible to achieve a compact tool coupling device.
It is additionally proposed that the tensioning element be mounted in a translationally movable manner. The expression “mounted in a translationally movable manner” is intended here to define, in particular, a mounting of a unit and/or of an element relative to at least one other unit and/or one other element, the unit and/or the element, in particular dissociated from an elastic deformation of the unit and/or element, and dissociated from movement capabilities caused by a bearing clearance, having a capability to move along at least one axis, along a distance greater than 1 mm, preferably greater than 5 mm, and particularly preferably greater than 10 mm. Advantageously, the design according to the invention makes it possible to achieve a compact tool coupling device.
It is additionally proposed that the transmission unit have at least one gate element for moving the tensioning element as a result of an actuation of the operating element. A “gate element” is to be understood here to mean, in particular, an element having at least one recess, in particular a slot, in which there engages a further element that corresponds to the element, and/or which has at least one extension that engages in a recess of a further element that corresponds to the element, a constrained movement of the further element being effected, in dependence on a geometric shape of the recess, as a result of a movement of the element. Preferably, the gate element is realized as a gate disk or as a gate translation element. Preferably, the tensioning element engages in the recess of the gate element. Through simple design means, it is possible to achieve movement of the tensioning element on a predefined movement path. Thus, advantageously, the travel distance along which the tensioning element moves can be limited through simple design means.
Furthermore, it is proposed that the gate element be mounted in a translationally movable manner. Preferably, the gate element has an axis of motion that is at least substantially perpendicular to the rotation axis of the drive element. Preferably, the gate element is guided translationally by two linear guide elements of the transmission unit that are at least substantially parallel to each other. Advantageously, the design of the tool coupling device according to the invention enables the gate element to be guided in a precise manner.
Moreover, in an alternative design of the tool coupling device, it is proposed that the gate element be mounted in a rotatable manner. Preferably, the gate element has an axis of motion that is at least substantially parallel to the rotation axis of the drive element. Advantageously, it is possible to achieve a transmission unit designed to have a flat structure. Thus, advantageously, a compact tool coupling device can be achieved.
It is additionally proposed that the cutting-strand tensioning unit have at least one spring element, which is provided to apply a spring force to the tensioning element and/or to a gate element of the transmission unit. A “spring element” is to be understood to mean, in particular, a macroscopic element having at least two ends that are spaced apart from each other and that, in a normal operating state, can be moved elastically relative to each other along a movement path, the movement path being at least greater than 0.5 mm, in particular greater than 1 mm, preferably greater than 2 mm, and particularly advantageously greater than 3 mm, and that, in particular, generates a counter-force, which is dependent on an elastic movement of the ends relative to each other and preferably proportional to the elastic movement of the ends relative to each other, and which counteracts the variation. A “macroscopic element” is to be understood to mean, in particular, an element having an extent of at least 1 mm, in particular of at least 5 mm, and preferably of at least 10 mm. The spring element in this case may be realized as a tension spring, as a compression spring, as a torsion spring, as a spiral spring, etc. Particularly preferably, the spring element is realized as a helical compression spring or as a leg spring. It is also conceivable, however, for the spring element to be of different design, considered appropriate by persons skilled in the art. Advantageously, the design of the tool coupling device according to the invention enables the tensioning element to be biased to at least one operating position, in particular to a tensioning position.
Furthermore, it is proposed that the transmission unit comprise at least one lever element that, as a result of an actuation of the operating element, moves a gate element of the transmission unit for the purpose of moving the tensioning element. A “lever element” is to be understood here to mean, in particular, an element mounted such that it can be swiveled at least about an axis of motion of the element and that, in particular, has a maximum extent along a direction that is at least substantially perpendicular to the axis of motion, in order to realize at least one lever arm. Preferably, the lever element is realized as a two-sided lever element that, as viewed in two opposing directions, out from the axis, or from a rotation point, realizes a load arm and a power arm, respectively. It is conceivable for the transmission unit to have a multiplicity of lever elements that act in combination with each other, or are connected to each other, for the purpose of moving the tensioning element. Advantageously, by means of the design according to the invention, a stepped-up force can be produced for the purpose of moving the tensioning element. Thus, advantageously, a small actuating force, applied by an operator to actuate the operating element, can be stepped up to a large actuating force of the tensioning element.
It is additionally proposed that the transmission unit have at least one eccentric element that acts in combination with the tensioning element for the purpose of moving the tensioning element as a result of an actuation of the operating element. An “eccentric element” is to be understood here to mean, in particular, an element mounted such that it can be swiveled at least about an axis of motion of the element, a mid-point, in particular a symmetry mid-point, of the element being disposed outside of the axis of motion. The eccentric element in this case may be directly or indirectly coupled to the tensioning element. Advantageously, a movement of the operating element can be converted to a movement of the tensioning element.
It is additionally proposed that the tool coupling device have at least one fixing unit, comprising at least one fixing element provided to fix the operating element in at least one position. Preferably, the fixing element is mounted in a rotatable manner. It is also conceivable, however, for the fixing element to be mounted in a translationally movable manner. Advantageously, by means of the design according to the invention, unintentional movement of the operating element can be prevented.
The invention is additionally based on a portable power tool comprising a tool coupling device according to the invention. The tool coupling device is preferably provided for form-closed and/or force-closed coupling to a power-tool parting device. A “portable power tool” is to be understood here to mean, in particular, a power tool, in particular a hand power tool, that can be transported by an operator without the use of a transport machine. The portable power tool has, in particular, a mass of less than 40 kg, preferably less than 10 kg, and particularly preferably less than 5 kg. Advantageously, it is possible to achieve a portable power tool on which a power-tool parting device can be arranged in a particularly convenient manner.
The invention is additionally based on a power tool system comprising a power tool according to the invention, and comprising a power-tool parting device, which has at least one cutting strand and has at least one guide unit that, together with the cutting strand, forms a closed system. A “cutting strand” is to be understood here to mean, in particular, a unit provided to locally undo an atomic coherence of a workpiece on which work is to be performed, in particular by means of a mechanical parting-off and/or by means of a mechanical removal of material particles of the workpiece. Preferably, the cutting strand is provided to separate the workpiece into at least two parts that are physically separate from each other, and/or to part off and/or remove, at least partially, material particles of the workpiece, starting from a surface of the workpiece. The cutting strand is preferably realized as a cutting chain. It is also conceivable, however, for the cutting strand to be of another design, considered appropriate by persons skilled in the art, such as, for example, designed as a cutting cord, to which cutting elements are fixed. The expression “guide unit” is intended here to define, in particular, a unit provided to exert a constraining force upon the cutting strand, at least along a direction perpendicular to a cutting direction of the cutting strand, in order to define a movement capability of the cutting strand along the cutting direction. A “cutting direction” is to be understood here to mean, in particular, a direction along which the cutting strand is moved, in at least one operating state, as a result of a driving force and/or a driving torque, in particular in the guide unit, for the purpose of producing a cut and/or parting-off and/or removing material particles of a workpiece on which work is to be performed. Preferably, the cutting strand, when in an operating state, is moved, relative to the guide unit, along the cutting direction. The term “closed system” is intended here to define, in particular, a system comprising at least two components that, by means of combined action, when the system has been demounted from a system, in particular the tool coupling device, that is of a higher order than the system, maintain a functionality and/or are inseparably connected to each other when in the demounted state. Preferably, the at least two components of the closed system are connected to each other so as to be at least substantially inseparable by an operator. “At least substantially inseparable” is to be understood here to mean, in particular, a connection of at least two components that can be separated from each other only with the aid of parting tools such as, for example, a saw, in particular a mechanical saw, etc. and/or chemical parting means such as, for example, solvents, etc.
In particular, the power-tool parting device, as viewed along a direction that is at least substantially perpendicular to a cutting plane of the power-tool parting device, has a maximum dimension of less than 10 mm, preferably less than 8 mm, and particularly preferably less than 5 mm. Preferably, the dimension is realized as the width of the power-tool parting device. Particularly preferably, the power-tool parting device, as viewed along the direction that is at least substantially perpendicular to the cutting plane of the power-tool parting device, has a maximum dimension that is at least substantially constant along a total length of the power-tool parting device. The power-tool parting device is thus preferably provided to produce a cut that has a maximum dimension of less than 5 mm, as viewed along the direction that is at least substantially perpendicular to the cutting plane of the power-tool parting device. The design according to the invention makes it possible, advantageously, to achieve a power tool system that can be adapted in a particularly convenient manner to differing fields of application in that, advantageously, the power-tool parting device can be removed from the tool coupling device.
The tool coupling device according to the invention, the portable power tool according to the invention and/or the power tool system according to the invention is/are not intended in this case to be limited to the application and embodiment described above. In particular, the tool coupling device according to the invention, the portable power tool according to the invention and/or the power tool system according to the invention may have individual elements, components and units that differ in number from the number stated herein, in order to fulfill a principle of function described herein.
Further advantages are given by the following description of the drawing. The drawing shows exemplary embodiments of the invention. The drawing, the description and the claims contain numerous features in combination. Persons skilled in the art will also expediently consider the features individually and combine them to create appropriate further combinations.
There are shown in the drawing:
The main body 52a additionally has a rotary play opening 60a (
Furthermore, the operating element 18a of the operating unit 20a of the tool coupling device 10a is mounted such that it can swivel about an axis of motion 24a of the operating element 18a that is at least substantially parallel to a plane of main extent of the operating element 18a. The operating element 18a in this case is mounted in a swiveling manner on the main body 52a. The axis of motion 24a of the operating element 18a, as viewed in a plane of projection into which the axis of motion 24a and the rotation axis 68a of the drive element 62a are projected, is at least substantially perpendicular to the rotation axis 68a. The operating element 18a is mounted such that it can swivel by 90° relative to the main body 52a. It is also conceivable, however, for the operating element 18a to be mounted such that it can swivel by an angle other than 90° relative to the main body 52a.
The tool coupling device 10a additionally has at least one fixing unit 34a, comprising at least one fixing element 36a provided to fix the operating element 18a in at least one position. The fixing element 36a is provided to fix the operating element 18a in a tool fixing position of the operating element 18a. For this purpose, the fixing element 36a is mounted in a swiveling manner. The fixing element 36a in this case is mounted in a swiveling manner on the operating element 18a. The fixing element 36a comprises at least two latching regions 70a, 72a. It is also conceivable, however, for the fixing element 36a to have a number of latching regions 70a, 72a other than two. The latching regions 70a, 72a, as viewed in a plane that is at least substantially perpendicular to the plane of main extent of the operating element 18a, or as viewed in a plane that is at least substantially parallel to the rotation axis 68a of the drive element 62a, are arcuate in form and each delimit an arcuate latching recess. Moreover, in an operating-element fixing position, the latching regions 70a, 72a act in combination with fixing studs 74a, 76a of the fixing unit 34a (
When the power-tool parting device 12a is coupled to the tool coupling device 10a, the power-tool parting device 12a, in the tool fixing position, is subjected to a clamping force in the direction of the main body 52a by means of the operating element 18a, in a receiving recess 78a of the main body 52a. This clamping force is generated by means of a swivel movement of the operating element 18a in the direction of the receiving recess 78a and by means of a combined action of the fixing element 36a and the fixing studs 74a, 76a when the operating element 18a is in the tool fixing position. Thus, at least the operating unit 20a and the fixing unit 34a, by acting in combination with the main body 52a, constitute a holding unit of the tool coupling device 10a. The holding unit is provided to act upon the power-tool parting device 12a, when the power-tool parting device 12a is coupled to the tool coupling device 10a, in a direction that is at least substantially parallel to the rotation axis 68a of the drive element 62a. It is also conceivable, however, for the holding unit to be of a different design, considered appropriate by persons skilled in the art (
Moreover, when the power-tool parting device 12a is coupled to the tool coupling device 10a, the power-tool parting device 12a is secured in a form-closed manner, by means of the receiving recess 78a of the main body 52a, against a rotational movement along a direction of rotation about the rotation axis 68a of the drive element 62a. The receiving recess 78a thus constitutes at least one power-tool parting-device torque holding element of a power-tool parting-device torque holding unit. For this purpose, the receiving recess 78a has a shape that corresponds to an external shape of at least one partial region of the power-tool parting device 12a, in particular a partial region of the guide unit 42a. The receiving recess 78a is thus realized as a negative shape of at least one partial region of the power-tool parting device 12a, in particular a partial region of the guide unit 42a. It is also conceivable, however, for the main body 52a to be of another design, considered appropriate by persons skilled in the art, that can prevent, insofar as possible, a rotational movement of the power-tool parting device 12a when the power-tool parting device 12a is coupled to the tool coupling device 10a (
Furthermore, the cutting-strand tensioning unit 14a comprises at least one transmission unit 22a, which is provided to move the tensioning element 16a as a result of an actuation of the operating element 18a of the operating unit 20a. The tensioning element 16a in this case is mounted in a translationally movable manner in a guide recess 84a of the main body 52a. The guide recess 84a is disposed in the receiving recess 78a. The tensioning element 16a is realized as a tensioning stud, which engages in a tensioning recess 86a (
Moreover, the cutting-strand tensioning unit 14a has at least one spring element 28a, which is provided to apply a spring force to the tensioning element 16a. The spring element 28a in this case is supported with one end on the main body 52a and, with another end, the spring element 28a is supported on a tensioning force support region 92a of the carrier element 88a. It is additionally conceivable that, for the purpose of supporting a tensioning force of the tensioning element 16a, the carrier element 88a an additional clamping and/or locking of the carrier element 88a on the main body 52a is possible, such as, for example, by a rough surface of the carrier element 88a or by a carrier element locking unit, etc. The tensioning force support region 92a and the actuating region 90a of the carrier element 88a in this case are connected to each other via a connecting region 96a of the carrier element 88a. The connecting region 96a has an elliptical shape (
For the purpose of coupling the power-tool parting device 12a to the tool coupling device 10a, the power-tool parting device 12a is inserted in the receiving recess 78a of the main body 52a, along a direction that is at least substantially parallel to the rotation axis 68a of the drive element 62a. The operating element 18a in this case is disposed in the position in which it has been swiveled away from the main body 52a. As the power-tool parting device 12a is inserted in the receiving recess 78a, the drive element 62a is introduced into a coupling recess 94a of the guide unit 42a (
Alternative exemplary embodiments are represented in
For the purpose of moving the clamping element 98b as a result of an actuation of the operating element 18b, in particular as a result of a rotation of the operating element 18b, the clamping element 98b comprises a stud-type actuating region 102b (
Furthermore, the cutting-strand tensioning unit 14b comprises at least one transmission unit 22b, which is provided to move the tensioning element 16b as a result of an actuation of the operating element 18b of the operating unit 20b. The tensioning element 16b in this case is mounted in a translationally movable manner in a guide recess 84b of the main body 52b of the tool coupling device 10b. The transmission unit 22b has at least one gate element 26b for moving the tensioning element 16b as a result of an actuation of the operating element 18b. The gate element 26b in this case is mounted in a rotatable manner. Moreover, the gate element 26b is realized as a gate disk, which has at least one tensioning-element guide gate 110b and at least two gate-element guide recesses 112b, 114b (
The gate element 26b is moved against the spring force of the further spring element 108b by means of the clamping element 98b, or by means of a rotational movement of the operating element 18b, via the clamping element 98b. For this purpose, the clamping element 98b has a driving extension 116b, which extends in the direction of the gate element 26b. The driving extension 116b acts in combination with a movement driving region 118b of the gate element 26b for the purpose of moving the gate element 26b (
After the receiving recess 78b has been released and the clamping element 16b has moved into the guide-unit insertion position, the power-tool parting device 12b can be introduced into the receiving recess 78b, along a direction that is at least substantially parallel to the rotation axis 68b of the drive element 62b. A rotational movement of the operating element 18b then causes the clamping element 98b to be moved into a clamping position, causing a clamping force to be exerted upon the power-tool parting device 12b in the direction of the main body 52b. In addition, the gate element 26b is turned as a result of the spring force of the further spring element 108b, and the tensioning element 16b is moved translationally in the guide recess 84b by means of the tensioning-element guide gate 110b. As a result, a guide unit 42b of the power-tool parting device 12b is moved relative to the drive element 62b. This results in tensioning of a cutting strand 40b of the power-tool parting device 12b by the spring force of the spring element 28b and of the further spring element 108b, or by the movement of the tensioning element 16b. Thus, automatic tensioning of the cutting strand 40b is effected as a result of the power-tool parting device 12b being clamped in the receiving recess 78b of the main body 52b. The tensioning-element guide gate 110b in this case is realized in such a manner that, by means of the tensioning-element guide gate 110b acting in combination with the spring element 28b and the further spring element 108b, a movement of the tensioning element 16b into a guide-unit insertion position is effected in a self-locking manner. Moreover, the further spring element 108b acts, via the gate element 26b, upon the clamping element 98b, which, in turn, acts upon the operating element 18b. As a result, the spring force of the further spring element 108b forces the clamping element 98b into the clamping position. It is also conceivable, however, for the clamping element 98b, or the operating element 18b, to be mounted in isolation from the spring force, and to be held in the clamping position by means of a fixing unit of the tool coupling device 10b.
The cutting-strand tensioning unit 14c additionally comprises at least one transmission unit 22c, which is provided to move the tensioning element 16c as a result of an actuation of the operating element 18c of the operating unit 20c. The transmission unit 22c has at least one gate element 26c for moving the tensioning element 16c as a result of an actuation of the operating element 18c. The gate element 26c is mounted in a translationally movable manner. The gate element 26c in this case is guided in an axial bearing recess 120c of a main body 52c of the tool coupling device 10c (
Moreover, the transmission unit 22c comprises at least one lever element 30c that, as a result of an actuation of the operating element 18c, moves the gate element 26c of the transmission unit 22c for the purpose of moving the tensioning element 16c. The lever element 30c is mounted in the main body 52c so as to be rotatable about an axis of motion of the lever element 30c that is at least substantially parallel to the rotation axis 68c of the drive element 62c. For the purpose of moving the gate element 26c, the lever element 30c bears with one end against the gate element 26c. In addition, the lever element 30c has an actuating extension 122c, which acts in combination with the operating element 18c. Furthermore, the cutting-strand tensioning unit 14c comprises at least one spring element 28c, which is provided to apply a spring force to the tensioning element 16c and/or to the gate element 26c of the transmission unit 22c. The spring element 28c is realized as a leg spring. The spring element 28c in this case is supported with one end on the main body 52c and, with another end, the spring element 28c is supported on the gate element 26c. The tool coupling device 10c additionally has at least one fixing unit 34c, comprising at least one fixing element 36c provided to fix the operating element 18c in at least one position. The fixing unit 34c is of a design similar to that of the fixing unit 34a described in
For the purpose of coupling the power-tool parting device 12c to the tool coupling device 10c, the power-tool parting device 12c is inserted in a receiving recess 78c of the main body 52c, along a direction that is at least substantially parallel to the rotation axis 68c of the drive element 62c. The operating element 18c in this case is disposed in the position in which it has been swiveled away from the main body 52c. As the power-tool parting device 12c is inserted in the receiving recess 78c, the drive element 62c is introduced into a coupling recess 94c of a guide unit 42c of the power-tool parting device 12c. As a result, a cutting strand 40c of the power-tool parting device 12c engages with the drive element 62c. In addition, the tensioning element 16c is introduced into a tensioning recess 86c of the guide unit 42c. As a result of the operating element 18c being moved into the tool fixing position, the operating element 18c actuates the lever element 30c by means of an eccentric element 32c of the transmission unit 22c. As a result, the lever element 30c is swiveled about the axis of motion of the lever element 30c, and actuates the gate element 26c. The gate element 26c in this case is moved translationally. The tensioning element 16c is thus moved into a guide-unit insertion position by the tensioning-element guide gate 110c. In respect of further features of the tool coupling device 10c, reference may be made to the description of
The cutting-strand tensioning unit 14d comprises at least one transmission unit 22d, which is provided to move the tensioning element 16d as a result of an actuation of the operating element 18d of the operating unit 20d. The transmission unit 22d is of a design similar to that of the transmission unit 22a described in
The cutting-strand tensioning unit 14e additionally comprises at least one transmission unit 22e, which is provided to move the tensioning element 16e as a result of an actuation of the operating element 18e of the operating unit 20e. The transmission unit 22e has at least one gate element 26e for moving the tensioning element 16e as a result of an actuation of the operating element 18e. The gate element 26e is mounted in a rotatable manner. The gate element 26e in this case is mounted in a rotatable manner in a main body 52e of the tool coupling device 10e. The gate element 26e additionally has at least one tensioning-element guide gate 110e for moving the tensioning element 16e as a result of an actuation of the operating element 18e. The transmission unit 22e additionally comprises at least one lever element 30e that, as a result of an actuation of the operating element 18e, moves the gate element 26e of the transmission unit 22e for the purpose of moving the tensioning element 16e. The lever element 30e in this case is mounted in the main body 52e such that it can be swiveled about an axis of motion of the lever element 30e. The axis of motion of the lever element 30e in this case is at least substantially parallel to the axis of motion 24e of the operating element 18e. Moreover, the transmission unit 22e has a force transfer element 128e, which is mounted in a swiveling manner on the operating element 18e. In addition, the force transfer element 128e is connected in a swiveling manner to the lever element 30e, by means of a link element 130e. The link element 130e in this case is realized as a hinge pin, which engages in a link eye of the lever element 30e and of the force transfer element 128e, respectively.
Furthermore, the cutting-strand tensioning unit 14e comprises at least one spring element 28e, which is provided to apply a spring force to the tensioning element 16e and/or to the gate element 26e of the transmission unit 22e. The spring element 28e is realized as a leg spring. The spring element 28e in this case is supported with one end on the main body 52e and, with another end, the spring element 28e is supported on the gate element 26e. As a result of the operating element 18e moving into a tool fixing position of the operating element 18e, in the direction of the main body 52e, the lever element 30e is actuated by means of the force transfer element 128e. As a result, the lever element 30e releases the gate element 26e. The gate element 26e is moved by the spring force of the spring element 28e. As a result, the tensioning element 16e is moved into a tensioning position of the tensioning element 16e by means of the tensioning-element guide gate 110e. In respect of further features of the tool coupling device 10e, reference may be made to the description of
The cutting-strand tensioning unit 14f additionally comprises at least one transmission unit 22f, which is provided to move the tensioning element 16f as a result of an actuation of the operating element 18f of the operating unit 20f. The transmission unit 22f has at least one gate element 26f for moving the tensioning element 16f as a result of an actuation of the operating element 18f. The gate element 26f is mounted in a translationally movable manner. In this case, the gate element 26f is guided in an axial bearing recess 120f of a main body 52f of the tool coupling device 10f (
The transmission unit 22f additionally comprises at least one lever element 30f that, as a result of an actuation of the operating element 18f, moves the gate element 26f of the transmission unit 22f for the purpose of moving the tensioning element 16f. The lever element 30f is mounted in the main body 52f so as to be rotatable about an axis of motion of the lever element 30f that is at least substantially parallel to the rotation axis 68f of the drive element 62f. For the purpose of moving the gate element 26f, the lever element 30f bears with one end against the gate element 26f. In addition, the lever element 30f has an operating-element pressure region 132f, which acts in combination with the operating element 18f. Furthermore, the cutting-strand tensioning unit 14f comprises at least one spring element 28f, which is provided to apply a spring force to the clamping element 16f and/or to the gate element 26f of the transmission unit 22f. The spring element 28f is realized as a helical compression spring. The spring element 28f in this case is supported with one end on the main body 52f and, with another end, the spring element 28f is supported on the gate element 26f. The spring element 28f is disposed in the axial bearing recess 120f of the main body 52f. In respect of further features of the tool coupling device 10f, reference may be made to the description of
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2012 211 094.1 | Jun 2012 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2013/061868 | 6/10/2013 | WO | 00 |
