Lifting electrical motor for electrical forklift

Abstract

The invention discloses a lifting electrical motor for an electrical forklift. An inner spline shaft is sleeved outside a cast-aluminum rotor and is in interference fit with the cast-aluminum rotor; a stator core is sleeved outside the cast-aluminum rotor, and a gap is reserved between the cast-aluminum rotor and the stator core; winding is embedded in the stator core; an rear end cover is connected with a connecting terminal of a speed sensor fixedly; an rear end of the inner spline shaft is connected with a rotating part of the speed sensor fixedly, and a coded disk of the rotating part of the speed sensor is fixed on an rear end face of the spline shaft, a plurality of magnetic steels are installed evenly on an outer circumference of the coded disk, and the magnetic steels are distributed alternately according to a N pole and an S pole; a Hall element of a stationary part of the speed sensor is integrated in a Hall circuit board, the Hall circuit board is fixed on a rear end cover, and a certain gap exists between the Hall element and the outer circle of the magnetic steel; and the rotating part of the speed sensor rotates along the inner spline shaft synchronously, when each of the magnetic steels rotates around the Hall element, the Hall element senses a voltage signal, and the signal is transmitted to an outer controller through the connecting terminal of the speed sensor.

Description

technical field [0001] The invention belongs to the technical field of manufacturing a driving device for an electric forklift, and in particular relates to a three-phase low-voltage asynchronous motor for driving a pallet fork of a balanced electric forklift. Background technique [0002] Electric forklifts carry goods through the forks at the front of the vehicle, and the up and down movement of the forks is driven by the lifting motor inside the forklift. The energy source of electric forklifts is DC batteries. So far, most of the lifting motors of counterbalanced electric forklifts are still DC motors. However, due to the small specific power and complex structure of DC motors, they will occupy a large space inside the forklift. , which brings great inconvenience to its installation. In addition, during the operation of the mechanical commutation device of the DC motor, the sliding contact between the brush and the commutator must be maintained. Therefore, there will in...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of the existing DC motors such as large volume, high noise, easy damage to the reversing device, poor reliability of the motor, and difficulties in after-sales maintenance, the present invention provides a low-voltage asynchronous lifting motor for electric forklifts. The AC asynchronous motor has a volume Small, simple structure, no mechanical reversing device, low noise, durable, high-speed operation, good working characteristics, high efficiency, no maintenance, etc.

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