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Portable machine tool with striker capture device and/or striker damping device

A machine tool, portable technology, applied in the field of hammer drill or impact hammer, can solve the problems of low quality, damaged hammer drill or impact drill, etc., and achieve the effect of simple installation and disassembly

Inactive Publication Date: 2009-09-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the hammer is sucked in again, which leads, in the manner described above, to an unloaded impact that can damage the hammer drill or percussion drill and is considered to be of low quality

Method used

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  • Portable machine tool with striker capture device and/or striker damping device
  • Portable machine tool with striker capture device and/or striker damping device
  • Portable machine tool with striker capture device and/or striker damping device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The hammer drill or percussion hammer, which is only partly shown in the figures, comprises an elongately extending hammer tube 2 with a hammering part 4 serving as the striking mechanism (not shown) of the hammer drill or percussion hammer Guided, rear section 6 with a large inner diameter; a middle section 10 with a slightly smaller inner diameter used as a guide for the impact pin 8 or punch of the impact mechanism and a middle section 10 used as a drilling tool or The front section of the tool receptacle of the chisel tool 12 has an even smaller inner diameter. The striker 4 , the striker bolt 8 and the drilling or chiseling tool 12 are each dimensioned such that they are guided axially movable within the associated section 6 , 10 or 14 of the hammer tube 2 .

[0026] Such as Figures 3 to 8 As shown most clearly in , the hammer 4 has a cylindrical outer peripheral surface 16 whose outer diameter is adapted to the inner diameter of the rear section 6 of the hammer ...

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PUM

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Abstract

A portable machine tool, such as a rotary and / or percussion hammer, comprises a percussion mechanism that has an axially movable striker 4 driven via an air spring, and an axially movable percussion pin 8. The percussion pin is arranged between the striker 4 and a tool 12 to transmit percussive impulses of the striker 4 to the tool when the tool is pressed against an abutment, and has a device (68, 70) for positioning and holding the striker (4) in a defined idling position when the machine tool is idling. The device (68, 70) for positioning and holding the striker comprises means (70) for frictionally and / or positively fixing the striker (4) in the idling position; and / or for braking the movement of the striker (4) before the idling position is reached.

Description

technical field [0001] The invention relates to a portable power tool, in particular a hammer drill or percussion hammer, according to the preambles of claims 1 and 2 . Background technique [0002] Conventional hammer drills or percussion drills have a percussion mechanism with a hammer driven by an air spring, which can be moved back and forth in a hammer guide unit during the percussion operation and thus strikes with great energy a percussion pin or pestle provided between the hammer and the tool to transmit impact impulse via the percussion pin or pestle to a drilling or chiseling tool mounted in the tool receiving portion of a hammer drill or percussion drill And the tool is passed on to the workpiece to be processed, such as a wall. During percussion work, the tool is held in a working position by a pressing force exerted by the operator on the hammer drill or percussion drill, in which the tool is pressed against the workpiece with its front end, while its rear end ...

Claims

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Application Information

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IPC IPC(8): B23B45/16B25D16/00
CPCB25D2250/321B25D17/24B25D2250/131B25D11/005B25D2250/191B25D17/06B25D2222/57
Inventor H·申德勒A·里德尔
Owner ROBERT BOSCH GMBH
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