Gearbox and 2KW motor integrated system applied to low-speed electric vehicle

Abstract

The invention discloses a gearbox and 2KW motor integrated system applied to a low-speed electric vehicle, which comprises a gearbox and a 2KW permanent magnet reluctance motor, wherein the shell of the gearbox is buckled by a box cover and a box body and then locked by a bolt and a screw nut; the stator and the rotor of the permanent magnet reluctance motor are formed by adopting silicon steel sheets in an overlapping mode; magnetic steels distributed circumferentially and uniformly are embedded in the rotor; the motor shaft of the permanent magnet reluctance motor and the power input shaft of the gearbox share one shaft; the sharing shaft has a diameter of 15 to 20mm; one end of the sharing shaft is arranged in the permanent magnet reluctance motor via a bearing, and the other end is arranged in the gearbox via a bearing; the middle part of the sharing shaft is arranged at the place where the permanent magnet reluctance motor and the gearbox are joined via a bearing. Thus, connection abnormal sound and failure caused by adopting spline coupling after split design can be effectively avoided; one bearing is saved; and through matching the shaft diameter relation between the permanent magnet reluctance motor power and the sharing shaft, the system performance can be ensured to be the best.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an integrated system of a gearbox and a motor for low-speed electric vehicles. Background technique [0002] Electric vehicles are driven by electricity, while cars are powered by oil. The basic requirements for the performance of electric vehicle motors are: large enough starting torque, fast start, acceleration, climbing, frequent start and stop requirements; small speed range of the motor; large specific power (specific power is defined as energy per unit mass The maximum power provided), measured by the maximum power; fast torque response characteristics, can quickly and softly control the driving and braking torque in various speed ranges, requiring high motor controllability, steady-state accuracy and good dynamic characteristics ;It has good environmental adaptability and can work reliably under different working conditions; it is easy to maintain and has low wo...

AI Technical Summary

Problems solved by technology

[0003] The existing motor is installed outside the gearbox, and the motor shaft of the motor and the power input shaft of the gearbox are set separately. The motor shaft drives the power input shaft of the gearbox to rotate through splines and couplings, which may easily cause abnormal noise or failure of the connection

In addition, the motor shaft and the power input shaft of the gearbox need to be equipped with two bearings respectively, which increases the manufacturing cost and increases the overall size

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