Percussion hand-held power tool with axially displaceable percussion mechanism

Abstract

A percussion hand-held power tool includes a housing (4), a chuck (2) provided at one end of the housing (4), a handle (3) provided at an opposite end of the housing (4) and secured thereto, an axially displaceable percussion mechanism (5) located in the housing and connected thereto, at its handle side, by a spring (6) and a transversely extending articulated arm (7), and supported in the housing (4), at its chuck side, by axial slide surface element (8).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings show:

FIG. 1 a partially cross-sectional view of a hand-held power tool according to the present invention; and

FIG. 2 a cross-sectional view along line II-II in FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A hand-held power tool 1 according to the present invention, which is shown in FIG. 1 and which applies axial blows along axis A, has a chuck 2 and a handle 3 secured to a housing 4 of the power tool 1. In the housing 4, there is arranged an axially displaceable percussion mechanism 5 which is connected at its handle side with the housing 4 by a spring 6 in form of a spiral compression spring. The percussion mechanism 5 is connected at its handle side with the housing 4 by a transverse articulated arm 7 in form of a leaf spring formed of sheet metal. At its chuck side, the percussion mechanism 5 is supported in the housing 4 by slide inserts 9 that engage an axial slide surface 8 of the percussion mechanism 5. The slide insert 9 is formed of a plastic material with intrinsic lubrication means. The percussion mechanism 5 forms part of a rigid module that includes a drive 12 and an electrical motor 13.

As shown in FIG. 2, the axial slide surface 8 is formed as a convex triangle (without the particularities being shown later) and is supported by three circumferentially distributed slide inserts 9 two of which are identically formed and are mounted each in the housing 4 with the use of a mounting sheet 10 and a screw 11.

Though the present invention was shown and described with references to the preferred embodiment, such is merely illustrative of the present invention and is not to be construed as a limitation thereof and various modifications of the present invention will be apparent to those skilled in the art. It is therefore not intended that the present invention be limited to the disclosed embodiment or details thereof, and the present invention includes all variations and/or alternative embodiments within the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A percussion hand-held power tool, comprising a housing (4); a chuck (2) provided at one end of the housing (4); a handle (3) provided at an opposite end of the housing (4) and secured thereto; an axially displaceable percussion mechanism (5) located in the housing; a spring (6) and a transversely extending articulated arm (7) for connecting the percussion mechanism (5) at a handle side thereof with the housing (4); and axial slide surface means (8) for supporting the percussion mechanism (5) at a chuck side thereof in the housing (4).

2. A percussion hand-held power tool according to claim 1, further comprising slide insert means (9) for supporting the slide surface means (8) in the housing (4).

3. A percussion hand-held power tool according to claim 2, wherein the slide insert means (9) comprises a plurality of slide inserts.

4. A percussion hand-held power tool according to claim 1, wherein the articulated arm (7) is formed as a leaf spring.

5. A percussion hand-held power tool according to claim 1, wherein the spring (6) is formed as a spiral compression spring.

6. A percussion hand-held power tool according to claim 1, wherein the percussion mechanism (5) forms part of a module that also includes a drive gear (12).