Friction type torque limiting structure

Abstract

The invention relates to a friction type torque limiting structure, in particular to a torque overload protection device, namely, when transmission torque exceeds a certain limited value, the friction type torque limiting structure slips to provide overload protection for equipment, and belongs to the technical field of mechanical equipment. The friction type torque limiting structure comprises a spacing shaft, friction plates, a transmission piece and a torque adjustment piece, wherein the spacing shaft neck portion of the spacing shaft is sleeved with the transmission piece, on end of the spacing shaft neck portion of the spacing shaft is connected with the torque adjustment piece through an external thread, one of the friction plates is arranged between the transmission piece and a flange portion of the spacing shaft, and the other friction plate is arranged between the transmission piece and the torque adjustment piece. According to the friction type torque limiting structure, the assembly and the setting of slipping torque are easy, and occupied space is small; a compressing position is on the middle portion of each friction plate, the friction generated through pressure is uniform, the accuracy of the set overload slipping torque is high, and even if the friction type torque limiting structure is used for a long term and slipped for multiple times, the set torque repeated accuracy is still high.

Description

technical field [0001] The invention relates to a frictional torque limiting structure, specifically a torque overload protection device, that is, when the transmitted torque exceeds a certain limit value, the frictional torque limiting structure will slip and provide overload protection for equipment, which belongs to mechanical equipment technology field. Background technique [0002] Torque overload protection is often used in power transmission. It is installed between the drive and the driven of the power transmission. When torque overload occurs, the torque limiting structure will produce relative slip, thus effectively protecting the safety of the driving machine and the driven machine. [0003] Such as figure 1 As shown, the usual friction torque limiting device applies pressure to the flanges on both sides of the transmission part D, the pressure plate C and the friction plate B by tightening the bolt E, so that the transmission part D transmits torque within the s...

AI Technical Summary

Problems solved by technology

This structure has the following defects: Since the compression bolt E is far away from the center of the friction plate B, the compression force between the flange, the pressure plate C, the friction plate B and the transmission part D is unevenly distributed, and the position close to the compression bolt E The frictional force is relatively large, but the frictional force is small at the place far away from the compression bolt E. After the transmission part D slips for a certain number of times, the set torque will change greatly.

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