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Portable power tool with improved brake assembly

A technology of electric tools and brake components, which is applied in the direction of manufacturing tools, portable grinding machines, parts of boring machines/drilling machines, etc., and can solve problems such as the spindle is not locked

Active Publication Date: 2013-04-24
BOSCH POWER TOOLS CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although conventional power tools with brakes stop quickly after operation, their spindles are not locked in place to prevent rotation

Method used

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  • Portable power tool with improved brake assembly
  • Portable power tool with improved brake assembly
  • Portable power tool with improved brake assembly

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Experimental program
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Embodiment Construction

[0035] Now, will refer to Figure 1-3 A portable electric tool according to a preferred embodiment of the present invention will be described.

[0036] Such as figure 1 As shown, the portable electric tool mainly includes: a motor housing 1; a motor 2, which is fixedly installed in the motor housing, and has a rotating spindle 20 defining a rotation axis Z; a fan 3, which is installed in the motor housing the motor is cooled by a nut 10 fixedly mounted around a rotating spindle 20 to be rotated by the spindle; and a guard 6 mounted on the motor housing adjacent to a tool head (not shown) to be attached to the end of the spindle , to prevent workpiece debris from reaching the operator of the tool.

[0037] The main shaft 20 is rotatably supported near its end by a front bearing 9 , which in turn is carried by a support structure 22 fixed or integrally formed on the motor housing 1 or the guard 6 .

[0038] The portable power tool further includes a brake assembly for termina...

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PUM

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Abstract

A portable power tool comprises a motor housing (1), a motor (2) mounted in the motor housing (1) and having a rotary spindle (20), a trigger (100) adapted to be actuated and released for switching on and off the motor (2) respectively, and a mechanical brake assembly connected with the trigger (100) and automatically operated by the trigger (100) such that the brake assembly releases the spindle (20) when the trigger (100) is activated and performs brake to the spindle (20) when the trigger (100) is released.

Description

technical field [0001] The present invention relates to a portable power tool having an improved braking assembly that quickly stops the power tool after it has been operated. Background technique [0002] Portable power tools with rotary output are widely used. Many portable power tools do not have a brake function. Typically, after operating a portable power tool, the operator must hold the power tool for a period of time until the spindle of the power tool comes to a complete stop. The operator can then put down the tool. This is time consuming and inconvenient for the operator. Furthermore, this situation has a high risk of injury. Specifically, when an operator drops a tool while the tool's spindle is still rotating, the tool could injure other items or people. [0003] To deal with this, some portable power tools are equipped with brakes to stop the tool quickly and smoothly, giving the operator more safety and a better feel. [0004] One solution in the state of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25F5/00B24B23/03B23B47/00
CPCB25F5/00B25F5/001B24B23/02
Inventor 甄波王爱贵金松涛
Owner BOSCH POWER TOOLS CHINA