Automatic speed limiting motor and crane

Abstract

The invention provides an automatic speed limiting motor which is provided with three speed limiting plates and a rotary disc, wherein the three speed limiting plates are fixedly connected onto a shell of a motor main body and are uniformly distributed on the periphery of the rotary disc; the rotary disc can synchronously rotate along with a rotating shaft of the motor main body, three slideways are uniformly arranged on the rotary disc, a sliding rod is arranged in each slideway, a friction disc is arranged at the outer end of the sliding rod, and a spring is also arranged on the sliding rod in a sleeving way; when the rotating speed of the motor is too high, the centrifugal force applied onto the sliding rod and the friction disc is larger, and when the centrifugal force is larger than the elastic force of the spring, the sliding rod and the friction disc move towards the direction away from the rotating shaft along the slideway and are further in contact with the speed limiting plates; through the friction between the speed limiting plates and the friction disc, the rotating speed of the motor is reduced, and further, the role of automatically limiting the speed is played. On the basis, the invention also provides a crane with the automatic speed limiting motor.

Description

technical field [0001] The invention relates to motor speed control technology, in particular to an automatic speed-limiting motor; in addition, it also relates to a crane using the automatic speed-limiting motor. Background technique [0002] An electric motor is a rotary electric machine that converts electrical energy into mechanical energy. It mainly includes an electromagnet winding or distributed stator winding for generating a magnetic field and a rotating armature or rotor. Under the action of the rotating magnetic field of the stator winding, a current passes through the armature squirrel-cage aluminum frame and is subjected to the action of the magnetic field to make it rotate. [0003] At present, electric motors have been widely used as prime movers in various mechanical products, such as rice milling machines, lifting mechanisms of gantry cranes, machine tools, water pumps, belt conveyors, fans, etc.; Changes in the situation, and sometimes even the situation o...

AI Technical Summary

Problems solved by technology

This deceleration method needs to rely on accurate and reliable electrical components, which undoubtedly increases the manufacturing cost of mechanical products. Under the condition of low cost and low requirements, it is suspected of wasting resources; and the maintenance and maintenance requirements of electrical components are relatively high. , in the case of a relatively harsh environment, the frequency of maintenance and maintenance is high, resulting in high maintenance costs

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