Anti-impact automatic tightening wrench and self-tightening method thereof

Abstract

The invention relates to an anti-impact automatic tightening wrench and a self-tightening method thereof, and belongs to the technical field of assembly tools. The anti-impact automatic tightening wrench and the self-tightening method thereof solve the problems that an assembly tool in the prior art is difficult to realize self-tightening, the labor intensity is increased due to counter-acting force during tightening, and workers are easy to feel fatigue, slow in response and inattention. The anti-impact automatic tightening wrench comprises a driving assembly, a transmission assembly and an output assembly, wherein, the driving assembly comprises a motor inner rotor and a motor outer rotor; the output assembly comprises a pulser and an output shaft; the motor inner rotor is fixedly connected with the output shaft; the motor outer rotor is mounted in a wrench outer shell through a bearing; and the pulser can output pulse impact to the output shaft, the impact force is used for tightening the bolt, and the counter-acting force of tightening impact is prevented from acting on the human body.

Description

technical field [0001] The invention relates to the technical field of assembly tools, in particular to an impact-resistant automatic tightening wrench and a self-tightening method thereof. Background technique [0002] Bolt connection is one of the most commonly used fastening methods in the field of manufacturing. It is suitable for connecting two or more parts. It has the advantages of convenient assembly, simple disassembly, high efficiency and low cost. It is especially suitable for repeated assembly. Dismantling structural connections and temporary connections. Generally, bolt assembly tools such as torque wrench are used to install and remove bolts, so that the tightening operation is more labor-saving, mechanized and automated. [0003] Although the existing torque wrenches have reduced the burden on the workers to a certain extent, they cannot achieve self-tightening. After the wrench sleeve is connected to the bolt to be tightened, the tightening action does not r...

AI Technical Summary

Problems solved by technology

[0006] In view of the above analysis, the present invention aims to provide an impact-resistant automatic tightening wrench and its self-tightening method to solve the problem that the existing bolt assembly tools cannot achieve self-tightening after the wrench sleeve is engaged with the bolt to be tightened. The tightening action does not require the operator to provide support during the tightening work, that is, the operator's arm is required to support the reaction force when the assembly tool is tightened during use

The existence of reaction force increases the labor intensity of workers, which is easy to cause negative effects such as fatigue, unresponsiveness, and lack of concentration. It does not meet the requirements of ergonomics and will directly affect labor efficiency, work quality and safety.

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