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Impact wrench

An impact wrench and impact block technology, applied in the directions of wrenches, wrenches, screwdrivers, etc., can solve the problems of limiting motor output power and efficiency, limited adjustment, single torque adjustment method, etc., to achieve multiple torque adjustment options, overcome the motor output power and the effect of reducing efficiency and diversifying torque adjustment methods

Active Publication Date: 2014-06-18
POSITEC POWER TOOLS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the existing impact wrench determines that the motor speed can only be adjusted by electronically adjusting the input current to achieve the adjustment of the impact torque. On the one hand, this limits the output power and efficiency of the motor. On the other hand, the torque adjustment method is single and the adjustment is limited. Cannot adjust torque without changing motor output power

Method used

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  • Impact wrench
  • Impact wrench

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Such as figure 1 and figure 2 As shown, the impact wrench according to this embodiment includes a housing 1 , a drive motor 2 , a gear reduction mechanism 3 and an impact device 4 . The impact device 4 further includes an active impact block 40 driven to rotate by the output shaft 30 of the gear reduction mechanism 3, a passive impact block 41 engaged with the active impact block 40, and a The working shaft 42 is provided with a reset device for the active impact block 40 between the output shaft 30 of the gear reduction mechanism and the active impact block 40. The reset device includes a compression spring 50 and a compression spring support 51. The active impact block 40 is positioned on the working shaft. When the load 42 is subjected to increases to a certain value, it can selectively disengage and disengage from the passive impact block 41, thereby exerting intermittent impact on the working shaft 42 in the direction of rotation.

[0019] The more specifi...

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PUM

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Abstract

The invention relates to an impact wrench which comprises a casing, a driving motor, a gear reduction mechanism and an impact device. The impact device comprises an impacting block, an impacted block and a working shaft, wherein a reset device of the impacting block is arranged between an output shaft of the gear reduction mechanism and the impacting block, and the reset device comprises a compression spring and a compression spring support. Especially, the impact wrench further comprises a mechanical torsion adjusting mechanism, wherein the mechanical torsion adjusting mechanism comprises an adjusting cover rotatably arranged on a housing and located on the outer side of the housing, a first adjusting unit and / or a second adjusting unit. When the first adjusting unit rotates on the adjusting cover, the impacted block can move in the direction close to or away from the impacting block so as to adjust the meshing amount between the impacting block and the impacted block. When the second adjusting unit rotates on the adjusting cover, the pre-pressure amount of the compression spring can be adjusted. The impact wrench adopts multiple torque adjusting modes and can perform torque adjustment under the condition that the motor output power is not changed.

Description

technical field [0001] The invention relates to an impact wrench, in particular to an impact wrench with a torque adjusting mechanism for adjusting the impact torque. Background technique [0002] An impact wrench is a tool used to drive screws, bolts, clamps, etc. An impact wrench generally includes a drive motor, a gear reduction mechanism, and an impact device, wherein the impact device includes an active impact block, a passive impact block, a working shaft, and the like. The active impact block is rotationally driven by the output shaft of the gear reduction mechanism, and the passive impact block can be engaged with the active impact block to be rotationally driven. The working shaft is connected to the passive impact block and is driven to rotate by the passive impact block, wherein the active impact block can be selectively disengaged from the passive impact block when the load on the working shaft increases to a certain value, and then driven by the rotation of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B21/02B25B23/147
CPCB25B21/02B25B23/1475
Inventor 纪明波
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD