Worm gear overload protection device

Abstract

The invention discloses a worm gear overload protection device. The worm gear overload protection device comprises a worm gear mechanism connected with a limiting torque coupling, wherein the worm gear mechanism comprises a worm box, a worm, a worm gear and a worm gear shaft, an input end of the worm is connected with a prime mover through the limiting torque coupling, an output end of the worm gear shaft is connected with external load, and the worm gear and the worm gear shaft are connected in a rotatable manner. According to the worm gear overload protection device, the worm gear and the worm gear shaft are connected in a rotatable manner, so that the worm gear shaft and the worm gear can rotate mutually when overload torque is obtained by the worm gear shaft connected with the limiting torque coupling, so that overload output by the worm gear shaft is avoided.

Description

technical field [0001] The invention relates to the field of overload protection, in particular to an overload protection device for a worm gear. Background technique [0002] In the field of mechanical transmission, especially in the worm gear transmission line connected with the ultimate torque coupling, most of the existing overload protection methods are by setting sensors such as torque or speed. The controller, and then the controller issues instructions to the servo actuator, such as a servo motor or other actuators, to stop it from running to overcome the overrun problem. The above method requires a control loop, and the actuator must be a servo structure in order to accept control However, there is a risk of failure of control circuits such as sensors. For some fields, if overloading will cause major losses to the system, it is not only required to have an over-limit control circuit, but also requires the worm itself to have an overload protection function, that is,...

AI Technical Summary

Problems solved by technology

[0002] In the field of mechanical transmission, especially in the worm gear transmission line connected with the ultimate torque coupling, most of the existing overload protection methods are by setting sensors such as torque or speed. The controller, and then the controller issues instructions to the servo actuator, such as a servo motor or other actuators, to stop it from running to overcome the overrun problem. The above method requires a control loop, and the actuator must be a servo structure in order to accept control However, there is a risk of failure of control circuits such as sensors. For some fields, if overloading will cause major losses to the system, it is not only required to have an over-limit control circuit, but also requires the worm itself to have an overload protection function, that is, In the case of failure of circuit components, it can still have the function of over-limit protection to avoid major accidents

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