Axial tension safe clutch for large load

Abstract

The invention provides an axial tension safe clutch for large load. The axial tension safe clutch for the large load comprises a shell, an input shaft, a lead screw, a friction engaging and disengaging mechanism, a reset pre-tightening adjusting mechanism and a lead screw nut matched with the lead screw, wherein the input shaft and the lead screw penetrate through the shell to be arranged in a rotating mode, the friction engaging and disengaging mechanism is used for transmission between the input shaft and the lead screw, and the reset pre-tightening adjusting mechanism is arranged on the input shaft. The friction engaging and disengaging mechanism comprises an input friction disc axially fixed to the input shaft, an output friction disc axially fixed to the lead screw, and a reset spring arranged between the lead screw and the output friction disc. The reset pre-tightening adjusting mechanism comprises a reset locking nut fixed at the axial position and is arranged on the input shaft through threaded connection. When the driving tension load of the input shaft or the lead screw is smaller than the corresponding separation load, the input friction disc and the output friction disc rotate synchronously under the effect of the pre-tightening force. When the driving tension load of the input shaft or the lead screw is not smaller than the corresponding separation load, the input friction disc and the output friction disc slip.

Description

technical field [0001] The invention relates to a tension safety protection device of a linear motion mechanism, in particular to a large-load axial tension safety clutch. Background technique [0002] Existing safety clutches include torque type safety clutches and axial safety clutches. The axial safety clutches are used in linear load conditions such as push-pull structures and crank mechanisms to protect the mechanism from axial stress. When the axial load exceeds the preset value, the transmission parts are disengaged to realize the axial overload protection function, but after the overload load is eliminated, it is necessary to tap the driving shaft in the opposite direction of the overload to complete the reset operation, and automatic reset cannot be realized; the existing shaft The sudden disappearance of the pulling force of the safety clutch after disengagement may cause equipment damage, low service life, poor reliability and safety. Contents of the invention ...

AI Technical Summary

Problems solved by technology

When the axial load exceeds the preset value, the transmission parts are disengaged to realize the axial overload protection function, but after the overload load is eliminated, it is necessary to tap the driving shaft in the opposite direction of the overload to complete the reset operation, and automatic reset cannot be realized; the existing shaft The sudden disappearance of the pulling force of the safety clutch after disengagement may cause equipment damage, low service life, poor reliability and safety

Images