Integrated-structure motor for electric vehicle

Abstract

The invention discloses an integrated-structure motor for an electric vehicle. The integrated-structure motor for the electric vehicle comprises a motor and a reduction box. The integrated-structure motor is characterized in that a shell forming the reduction box is provided with a bearing room, a bearing hole is formed in one side wall of the bearing room, an oil seal is arranged in the bearing hole, the other end of the motor shaft penetrates through a bearing in the bearing hole and stretches into the bearing room, a small gear is fixed to the shaft end at the other end of the motor shaft, the small gear is meshed with a gear of the reduction box, a cavity is formed in the outer side of one side wall of the bearing room, the other end of a motor stator core abuts against an allowance in an outer end opening of the cavity, and a screw rod which penetrates through a rear end cover and the stator core is connected and fixed in a screw hole formed in the outer end opening of the cavity in a screwed mode. Compared with the prior art, the integrated-structure motor has the advantages that the structure is compact, noise is low, machining errors are not likely to be accumulated, and the size is small.

Description

technical field [0001] The invention relates to a motor for an electric vehicle, in particular to a motor with an integral structure of a reduction box and a motor. Background technique [0002] At present, the gearbox and motor of electric vehicles are of split structure. The gearbox and motor are independent parts. Automobile manufacturers purchase them separately. For the main structure, see figure 1 , the output shaft of the motor is the spline shaft 1, the end cover of the motor is processed with a spigot 2, the spigot 2 is concentric with the spline shaft, and the end face of the motor is also processed with a mounting screw hole 3. When installing, insert the motor spline shaft into the spline of the reducer In the key hole 4, the seam 2 of the motor end cover cooperates with the seam 5 of the reduction box, and the screw 6 passes through the screw hole 3 of the motor to axially fix the motor to the speed reduction box. When working, the spline shaft of the motor dri...

AI Technical Summary

Problems solved by technology

[0003]1. Due to the influence of the gap, the spline shaft of the motor and the spline sleeve of the gearbox are matched, and the noise is large:

[0004]2. There are cumulative machining errors between the spline shaft of the motor and the seam on the end face of the motor, which can easily cause interference;

[0005]3. The motor is fixed to the reduction box with screws, and there is a risk of loosening;

[0006] Due to the double-layer thickness of the motor end cover and the gearbox shell, the axial length of the whole machine is large, which is not conducive to the overall space layout of the car

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