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Hand machine tool with a vibration damped rounded handle

A technology for hand-held machine tools and handles, applied in the field of hammer drills and/or impact hammers, which can solve the problems of increased number of components, increased component inventory costs, and increased assembly costs

Inactive Publication Date: 2009-09-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are that, on the one hand, the different shapes of the coupling parts are perceived, thereby increasing the number of parts and thus the storage and assembly costs, and on the other hand, two compression springs are required, which increases the number of parts

Method used

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  • Hand machine tool with a vibration damped rounded handle
  • Hand machine tool with a vibration damped rounded handle
  • Hand machine tool with a vibration damped rounded handle

Examples

Experimental program
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Effect test

Embodiment Construction

[0018] figure 1 A hand-held power tool 2 in the form of a hammer drill or percussion hammer shown schematically in the figure basically consists of a housing 4, a tool holder 6 for receiving a tool 8 and a drive unit (not shown) surrounded by the housing 4 ) composition, the drive device is used to drive the tool 8 mounted in the tool holder 6 in rotation and impact.

[0019] In a known manner, the drive device consists of an electric drive motor and a percussion mechanism also driven by the drive motor, which drives the tool 6 in rotation via a reduction gear or shift gear, by means of which the percussion mechanism can be used to Impact forces in the working direction A of the machine tool 2 act on the tool 8 in the tool holder 6 .

[0020] On its rear end facing away from the tool holder 6, the housing 4 is provided with an arcuate handle 10, which is connected to an additional handle detachably mounted on the housing 4 at 12 near the tool holder 6. 14 together are used t...

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Abstract

The invention relates to a hand machine tool (2), particularly a percussion drill and / or percussion hammer, comprising a housing (4) having two parallel appendages (20, 22), a hollow, U-shaped, rounded handle (10) with a yoke (24) and two parallel legs (26, 28), said handle being movably supported on springs in relation to the housing (4) for the purpose of damping vibration. The appendages (20, 22) of the housing (4) extend into both hollow legs (26, 28) of the rounded handle (10). The invention also comprises two coupling elements (34, 36) situated in the hollow yoke (24) of the rounded handle (10) which serve to synchronize the movements of both legs (26, 28). The external end faces of the coupling elements (34, 36) are flexibly connected to the appendages (20, 22). The coupling elements (34, 36) are connected on the other end faces thereof to the rounded handle (10), and cross each other, and are flexibly connected to each other at the crossing point.

Description

technical field [0001] The invention relates to a hand-held power tool according to the preamble of claim 1, in particular a hammer drill and / or percussion hammer, which has a housing and an elastically mounted, vibration-damping U that is movable relative to the housing. Bow-shaped handle. Background technique [0002] Especially on hand-held power tools with an impact drive, such as drill hammers, hammer chisels and the like, the hand-held power tools can be exposed to considerable vibrations. If these vibrations are transmitted to the handle for pressing the hand-held power tool against the workpiece, this not only causes discomfort for the operator, but also can lead to damage to health when subjected to it for a long time. For linear vibration damping, double-shell housings have thus far been generally used, in which the entire hammer is elastically suspended in the housing in its working direction. However, this construction is relatively complex and therefore expens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25D17/04B25F5/00
CPCB25D17/043B25D2250/371
Inventor H·施泰因克G·迈克斯纳
Owner ROBERT BOSCH GMBH
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