Electric hoist with symmetrical mechanisms

Abstract

The invention discloses an electric hoist with symmetrical mechanisms. The electric hoist comprises motor mechanisms, a fixing mechanism and a hoisting mechanism, the hoisting mechanism is arranged inthe fixing mechanism and penetrates through the fixing mechanism to be assembled with the motor mechanisms, the motor mechanisms are arranged on the two sides of the fixing mechanism and are symmetrical about the fixing mechanism, and an eccentric mechanism is also arranged in each motor mechanism. According to the electric hoist, double stators and double rotors which are of symmetrical structures are adopted, so that the weight of the whole electric hoist can be evenly distributed, and the gravity center can be easily kept at the chain wheel position; the stators and the rotors are of super-flat structures, the size is small, and super-high torque density output can be generated; and the eccentric mechanisms are arranged, when motors work, although eccentricity exists, the eccentric distance is almost kept unchanged, the torque can be smoothly transmitted to a chain wheel, when the motors stop working, force is reversely transmitted back from the chain wheel, the eccentric distancebetween the center of a planet carrier and the center of a planet gear can be increased at the moment, so that engaged planets are locked to achieve the self-locking effect, and therefore a redundantstop structure is removed, so that the electric hoist is more simplified.

Description

technical field [0001] The invention relates to the field of design and manufacture of hoisting equipment, more specifically, it relates to an electric hoist with a symmetrical mechanism. Background technique [0002] The electric hoist is a kind of special lifting equipment, which is installed on the crane and the gantry crane. The electric hoist has the characteristics of small size, light weight, simple operation, and convenient use. The hoist motor adopts a brushed disc winding motor, a brushed disc winding motor, a brushed disc winding motor is bonded on a cylinder with rare earth materials, and a disc winding made of enamelled copper wire is placed in the cylinder , forming the rotor. The phase of the motor is adjusted by a mechanical commutator. The mechanical commutator adjusts the voltage phase by friction between the fixed carbon brush and the rotating copper commutation surface. Due to the high speed of the motor, multi-stage gear reduction must be adopted, whi...

AI Technical Summary

Problems solved by technology

Due to the high speed of the motor, multi-stage gear reduction must be adopted, which brings two problems, one is the noise, and the other is the loss of efficiency

Images