HAND POWER TOOL

Abstract

In a hand power tool, including a first housing part and a second housing part as well as a damping element between the first housing part and the second housing part, the damping element is connectable to the first housing part and the second housing part, wherein the first housing part and the second housing part are spaced apart from one another longitudinally of the hand power tool.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of one embodiment of a hand power tool of the invention with a damping element;

FIG. 2 shows a detail of a view from inside in the housing of the hand power tool of FIG. 1; and

FIG. 3 is a schematic illustration of one embodiment of a damping element with retaining elements.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

In FIG. 1, one embodiment of a hand power tool of the invention, a power right-angle sander 10, is shown. In the embodiment shown, the power right-angle sander 10 includes three housing parts: a first housing part 11, for receiving an electric motor (not shown), among other things; a second housing part 12, which is embodied as a handle 15; and a third housing part 13, for receiving a gear (not shown), among other things.

A drive shaft that can be driven by an electric motor is coupled to a driven shaft (not shown) via a gear, comprising a driving gear wheel and a driven gear wheel. A sanding wheel (not shown) is located on the driven shaft in a manner fixed against relative rotation. The electric motor is switched on and off by the user via an ON/OFF switch 19.

In the embodiment of FIG. 1, the first housing part 11 and the housing part 12 are of plastic, while the third housing part 13, which is the gearbox, is of metal.

The right-angle power sander 10, in the region between the first housing part 11 or motor housing and the second housing part 12 or handle, has a damping element 21 for vibrationally decoupled or vibration-damped connection of the two housing parts 11, 12. As can be seen in FIG. 1 and especially in the sectional view of FIG. 2, the first housing part 11 and the second housing part 12 are spaced apart from one another longitudinally of the right-angle power sander 10, so that an interstice 15 is formed. The interstice 15 is provided in the form of a gap between the first housing part 11 and the second housing part 12. The damping element 21 fills the interstice 15, and the connection of the two housing parts 11, 12 to one another is effected solely via the damping element 21, so that there is no direct, rigid connection between the two housing parts 11, 12.

The damping element 21 is of an elastic material, in particular a thermoplastic elastomer. It is connected to the first and second housing parts 11, 12 by injection molding; the damping element 21 is integrally molded from inside onto the inner walls 14, 16 of the two housing parts 11, 12. Alternatively, the damping element may also be integrally molded to the housing parts in overlapping fashion (not shown) from outside or from both outside and inside.

The damping element 21 is embodied as nearly annular, so that it extends all the way around in the interstice 15 between the two housing parts 11, 12. In the interstice 15, it has a radially outward-oriented bead 23. As can be seen in FIG. 2, to improve the damping properties, the bead is embodied as essentially U-shaped.

In another embodiment, a damping element 21 of an elastic material is also provided in the interstice 15 between the first housing part 11 and the second housing part 12. For securely fastening the damping element 21 to the housing parts 11, 12, retaining elements 25 are built into the housing parts 11, 12. The retaining elements 25 may be of metal or plastic.

The retaining elements 125 are connected on the one hand each to one of the housing parts 11 or 12. On the other, the retaining elements 25 are connected to the damping element 21. The damping element 21 may for instance be molded to sheathe the retaining elements 25, so that the retaining elements 25 are embedded in the damping element 21.

In the embodiment shown in FIG. 3, the retaining elements 25 comprise a first part 25a, which is connected to a housing part, in this case the housing part 12, and an angled second part 25b, which is connected to the damping element 21.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the type described above.

While the invention has been illustrated and described as embodied in a hand power tool, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.

Claims

1. A hand power tool, comprising a first housing part; a second housing part; a damping element located between said first housing part and said second housing part, said damping element being connectable to said first housing part and to said second housing part, said first housing part and said second housing part being spaced apart from one another longitudinally over the hand power tool.

2. A hand power tool as defined in claim 1, wherein said damping element is configured as a damping element composed of a thermoplastic elastomer.

3. A hand power tool as defined in claim 1, wherein said damping element is configured as a profiled damping element.

4. A hand power tool as defined in claim 4, wherein said damping element is provided with a radially-outward bead.

5. A hand power tool as defined in claim 1, wherein said damping element is configured as a damping element which is injection molding-connected to said first housing part and said second housing part.

6. A hand power tool as defined in claim 1; and further comprising at least one retaining element to which said damping element is connected, said retaining element being provided in a housing part selected from the group consisting of said first housing part, said second housing part, and both.

7. A hand power tool as defined in claim 7, wherein said damping element is configured as a damping element which is injection molding connected to said retaining element.

8. A hand power tool as defined in claim 1, wherein said first housing part and said second housing part are configured as a motor housing and a handle.