Self-retaining type deadlocking device

Abstract

The invention discloses a self-retaining type deadlocking device. The device comprises a basal body; a pin and a swing rod capable of swinging around the pin are arranged on the basal body; one end of a thimble installed on the swing rod is connected with the surface of the basal body through a spring; the other end of the thimble stretches into a motor rotating shaft cavity in the basal body; a motor rotating shaft outside the basal body is inserted into the motor rotating shaft cavity, and can freely rotate in the motor rotating shaft cavity; a coupler with grooves on the surface is fixedly installed on the part of the motor rotating shaft inserted into the motor rotating shaft cavity; and a camshaft cavity is also arranged at the same side of the swing rod, where the motor rotating shaft cavity in the basal body is. According to the self-retaining type deadlocking device disclosed by the invention, when a cam rotates to a protrusion part thereof and cannot reach the swing rod, under the elastic force action of the spring, the thimble and the grooves on the coupler are in abutting joint, so that the motor rotating shaft cannot rotate; therefore, deadlocking of the motor rotating shaft is realized; at this time, under the elastic force action of the spring, the thimble and the grooves on the coupler are always in abutting joint, so that the motor rotating shaft cannot rotate; and thus, the self-retaining deadlocking state without energy consumption can be realized.

Description

technical field [0001] The invention belongs to the field of locking devices for motor shafts, in particular to a self-maintaining locking device capable of maintaining the locked state of the motor shaft without consuming energy. Background technique [0002] In the power transmission system, the actuator is usually required to stop in a certain state when parking, and the state will not be destroyed when it is disturbed by an external force. Therefore, it is necessary to lock the motor shaft that drives the actuator to meet the requirements of the actuator. The traditional locking methods include: electromagnetic clutch locking and shaft locking. [0003] Electromagnetic clutch locking is to use the principle of electromagnetic clutch to achieve the purpose of locking and unlocking through the power on and off of the electromagnetic clutch. For example, the Chinese utility model patent CN205639409U discloses a circular electromagnetic brake and clutch, which includes a gro...

AI Technical Summary

Problems solved by technology

The advantage of this locking method is that it is easy to adjust and install, but the disadvantage is that it has poor reliability and large structural size.

[0005] It can be seen from the above that after the power is removed (such as power failure), the traditional locking method cannot maintain the locked state or the running state of the motor shaft, that is, it does not have the function of self-maintaining memory without energy consumption, and it needs to consume energy to maintain one of the states; The locking device mainly relies on electromagnetic torque or frictional torque to achieve braking. When the interference is large, it is prone to brake failure, and its volume and weight are large. In some environments that have strict requirements on energy consumption, reliability and volume and weight, such as deep sea , space, etc., the traditional locking method obviously cannot meet the requirements

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