Integral motor with stable structure for electric vehicle

Abstract

The invention provides an integral motor with a stable structure for an electric vehicle. The motor comprises a motor body and a reduction gearbox. The motor is characterized in that a housing of the reduction gearbox is divided into a left housing and a right housing; a bearing chamber is formed in the left housing; a through hole is formed in the wall of the right housing; a bearing is arranged on a left housing body; the other end of a motor shaft of the motor body is connected to the bearing on the left housing body; a pinion which engages with a gear of the reduction gearbox is fixed on the motor shaft; a cavity is formed in the outer side of the bearing chamber; a spigot is arranged at an outer port of the cavity; the cavity is equipped with a cylindrical chamber which axially directly reaches the spigot at a rear end cover; the other end of a stator iron core of the motor body is matched with the spigot; a winding extending out of the stator iron core is arranged in the cavity; a screw passing through the rear end cover is fixed into a screw hole in the outer port of the cylindrical cavity by a rotating manner. Compared with the prior art, the motor has the advantages of being compact in structure, small in noise, difficult to cause accumulated processing error, and small in size.

Description

Technical field: [0001] The invention relates to an electric motor for electric vehicles, in particular to an integrated electric motor for electric vehicles with a stable structure. 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 shaf...

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]4. Due to the effect of 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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