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Connecting rod drive comprising an additional oscillator

A driving device and anti-oscillation technology, which is applied in the direction of striking tools, manufacturing tools, and portable impact tools, etc., and can solve problems such as energy loss, overall efficiency deterioration, and attenuation of shell vibrations

Inactive Publication Date: 2012-06-20
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires not only additional effort, construction space and expenditure
Also the friction and wear effects are enhanced by the additional spring compression, additionally most of the energy necessary for the compression of the spring is lost, making the overall efficiency worse and having to provide more motor power
[0012] The hitherto known embodiments have in common that they primarily dampen housing oscillations induced by the impact mechanism assembly

Method used

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  • Connecting rod drive comprising an additional oscillator
  • Connecting rod drive comprising an additional oscillator
  • Connecting rod drive comprising an additional oscillator

Examples

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Embodiment Construction

[0035] figure 1An embodiment of a power tool 1 according to the invention is shown. In the present case the power tool 1 is a hammer drill.

[0036] The electric tool 1 is driven by means of an electric motor 20 , wherein the electric motor 20 drives a motor shaft 21 with a drive pinion 22 , and the drive pinion 22 drives a drive gear 23 which is coaxially movable in the direction of rotation. It is arranged to rotate about an eccentric axis 9 . In addition, the eccentric disk 10 is rotatably arranged coaxially about the eccentric axis 9 , so that the eccentric disk 10 is driven by driving the drive gear 23 .

[0037] The connecting rod 12 is arranged eccentrically and rotatably about an eccentric axis 33 on the eccentric disk 10 by means of the eccentric pin 11 . The rotational movement of the eccentric disk 10 is converted into a translational movement via the connecting rod 12 in order to periodically drive a piston 121 of the striking mechanism assembly 3 , which is arr...

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Abstract

The present invention relates to an electric tool (1), comprising a striking mechanism assembly (3), which can be driven in and against a striking direction (4) in a cyclic manner, and a counter-oscillator (5) for compensating for vibrations of the electric tool (1), in particular of housing oscillations, comprising a balancing mass (2), wherein the balancing mass (2) can be driven in a movement direction (6) by driving the striking mechanism assembly (3), wherein the movement direction (6) extends at an angle to the striking direction (4).

Description

technical field [0001] The invention relates to a counter-oscillator, which is arranged in the power tool to compensate for oscillations of the housing of the power tool, the power tool in particular comprising an impact mechanism assembly, and the counter-oscillator comprising a drive and a balancing mass. Background technique [0002] Vibration issues in power tools, especially hammer drills and impact hammers, are becoming more and more important due to the regulatory requirement that the permissible daily workload when using power tools be related to the body load on the operator. important. [0003] In percussion drilling and chiseling with hammer machines, the large body load on the user results from the housing oscillations produced by the percussion mechanism. Precisely in large hammer drills and percussion hammers, vibrations are very prominent due to the high impact energy. For users of these machines, therefore, the permissible working time is partly and severel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25D17/24B25D11/12
CPCB25D17/24B25D11/125B25D2217/0088
Inventor C·迪姆W·布劳恩H·施密德H·吕布扎门J·科里克P·勒纳特
Owner ROBERT BOSCH GMBH
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