Speed reducer with anti-load function

The utility model relates to the technical field of speed reducers, in particular to a speed reducer with an anti-load function. The design comprises the design of a torque limiting input device. Power transmission is carried out under the action of friction force between the two friction plates; when it reaches a certain torque, when the motor reaches the maximum load; when the load of the speedreducer reaches the maximum, the friction plates start to slide relatively, but the motor still rotates normally, so that the motor can be prevented from being burnt out, and the problems that a traditional speed reducer is not provided with an overload protection device, the motor is burnt out easily during overload operation, the abrasion degree of a gear is increased during high-load operation,and the service life is shortened are solved; by increasing or decreasing the number of the gaskets, the compression degree of the spring in the initial state can be controlled, the pressure betweenthe two friction plates is