Safety Clutch

Abstract

The invention discloses a safety clutch. The safety clutch comprises a bracket, belt wheels, a transmission shaft, permanent magnets, electromagnets, iron cores, fan fixed plates, heat dissipation plates and rear covers, wherein the belt wheels are rotationally arranged to the bracket by bearings, the belt wheels sleeves the transmission shaft, and the belt wheels are provided with transmission plates; one sides of the transmission plates are provided with coils and the iron cores, and the coils and the iron cores are fixed to the bracket; the other sides of the transmission plates are provided with suction plates, first elastic pieces are fixed between the suction plates and the rear covers, the permanent magnets are fixedly arranged on the sides, far away from the suction plates, of therear covers, and the rear covers are rotationally arranged on the transmission shaft; the rear covers are fixedly connected with the fan fixing plates, the heat dissipation plates are fixedly connected with the transmission shaft, second elastic pieces are fixed between the heat dissipation plates and the belt wheels, and the heat dissipation plates and the permanent magnets are oppositely arranged; and a piston cavity is arranged in the bracket in an erected mode, a piston is arranged in the piston cavity in a sliding mode, and the transmission shaft is rotationally arranged on the piston. The safety clutch realizes flexible control by controlling gaps between the heat dissipation plates and the permanent magnets through the piston, and meanwhile has the function of failure protection.

Description

Technical field [0001] The invention relates to the technical field of engines, in particular to a safety clutch. Background technique [0002] The electromagnetic fan clutch is a device that can control the fan speed through the water temperature. It can be energized and disconnected by the large and small coils to achieve suction and separation. The fan speed can switch between high speed, medium speed and low speed with the water temperature, and the engine water temperature can be controlled at a relative Improve thermal efficiency within a reasonable fluctuation range. Compared with rigid fans, the electromagnetic fan clutch saves energy and reduces consumption, and responds quickly to the silicon oil fan, which makes the electromagnetic fan clutch widely used. [0003] At present, the multi-stage electromagnetic clutch used in the engine is mostly pure electromagnetic control. The suction disc and the drive disc are attracted by electromagnetism. The suction force generated ...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the multi-stage electromagnetic clutches used in the engine are purely electromagnetically controlled. The suction of the suction plate and the drive plate is realized through electromagnetism. The suction force generated at the moment of suction can reach 10-13KN. It is a non-safety type. When the fan clutch fails, the low-speed rotation of the fan can only be guaranteed by the friction of the bearing, which will easily lead to high water temperature in the cooling system. The locking screw can only be manually locked as a temporary measure. The operation is cumbersome and the time limit is short. causing users to panic

In addition, the huge impact force can easily lead to engine gear train failure, increase the gear train failure rate, and reduce the life of the gear train

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