Torque adjusting device of electric hammer

Abstract

The invention discloses a torque adjusting device of an electric hammer. The device comprises an air cylinder, a clutch sleeve, a transmission gear and an adjusting sleeve, wherein the clutch sleeve, the transmission gear and the adjusting sleeve are arranged on the air cylinder in a sleeve mode, the clutch sleeve rotates along with the air cylinder and is provided with a threaded part and a first clamping part, the transmission gear is provided with a second clamping part, the second clamping part is meshed with the first clamping part, so that the transmission gear is meshed with the clutch sleeve, at the moment, joint force exists between the second clamping part and the first clamping part, and when the air cylinder is locked and a clutch torque is larger than the joint force, the transmission gear is disengaged from the clutch sleeve. The adjusting sleeve is in threaded connection to the threaded part, and the clutch sleeve moves in the axial direction of the air cylinder along with rotation adjustment of the adjusting sleeve so as to adjust a contact depth of the first clamping part of the clutch sleeve and the second clamping part of the transmission gear to adjust the magnitude of the joint force, and therefore free adjustment of the maximum clutch torque is achieved.

Description

[technical field] [0001] The invention relates to the field of electric hammers, in particular to an electric hammer torque adjustment device. [Background technique] [0002] The structural characteristics and special operation of the electric hammer make it widely used in the fields of architecture and construction, and is deeply loved by the majority of users. In the actual application process, due to the instability of the use environment, the load changes continuously, which often causes overload or stall of the electric hammer, and the reaction force generated during overload or stall may easily cause personal injury accidents. The existing electric hammer generally has a safety clutch mechanism, the purpose of which is to prevent injury when the electric hammer hits the steel bar and the drill bit is blocked. But the clutch torque in the existing safety clutch mechanism is all fixed, and it is set when leaving the factory and can't be adjusted in use. However, this c...

AI Technical Summary

Problems solved by technology

However, the clutch torque in the existing safety clutch mechanism is fixed, which is set at the factory and cannot be adjusted during use.

However, this causes a problem. In some application environments, the drill bit of the electric hammer touches the steel bar to trigger the clutch, and the drill bit cannot continue to move forward. However, due to space problems, the user must drill holes here and cannot change places to make other holes.

This has caused great difficulties for the user. At this time, only an electric hammer with a larger clutch torque can be used to continue drilling to break through the steel bars. This requires the user to prepare more electric hammers with different clutch torques during construction. Makes construction very troublesome

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