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Patent Searching and Data


Title:
IMPACT CONTACT SURFACE SHAPE OF IMPACT WRENCH
Document Type and Number:
WIPO Patent Application WO/2021/204053
Kind Code:
A1
Abstract:
An impact contact surface shape of an impact wrench, the impact wrench comprising a rotating shaft acting on a workpiece and an impact block sleeved on the rotating shaft and driving the rotating shaft to rotate, wherein at least one stop block colliding with the impact block is provided at one end of the rotating shaft, and at least one lock block colliding with the stop block is provided on the impact block. The impact contact surface comprises: at least one first contact surface located on the stop block and used for pressing against and making contact with the lock block, and at least one second contact surface located on the lock block and pressing against the first contact surface, the first contact surface and the second contact surface being a circular arc shape or a cycloid shape that may engage with each other. The first contact surface of the stop block and the second contact surface of the lock block are a circular arc shape or cycloid shape that may engage with each other, so that the contact area during collision is maximized and the local contact force on the first contact surface and the second contact surface is prevented from concentrating, thereby reducing the local contact stress between the lock block and the stop block, reducing the wear of the lock block and the stop block, and increasing the service life of the rotating shaft and the impact block.

Inventors:
SHI ZHAOJUN (CN)
HUANG CANQUAN (CN)
Application Number:
PCT/CN2021/084883
Publication Date:
October 14, 2021
Filing Date:
April 01, 2021
Export Citation:
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Assignee:
SHI ZHAOJUN (CN)
International Classes:
B25B21/02
Foreign References:
CN210025095U2020-02-07
JP2014151389A2014-08-25
JP2001198853A2001-07-24
US20140069674A12014-03-13
CN102083594A2011-06-01
CN209125747U2019-07-19
Attorney, Agent or Firm:
GUANGZHOU NANFENG PATENT AGENT LTD. CO. et al. (CN)
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