CN104702044A

CN104702044A - Improved structure of motor with integral structure for electric vehicle

Info

Publication number: CN104702044A
Application number: CN201510105685.0A
Authority: CN
Inventors: 李显平; 梁昌勇; 魏建平
Original assignee: GUANGDONG HEPU POWER TECHNOLOGY CO LTD
Current assignee: GUANGDONG HEPU POWER TECHNOLOGY CO LTD
Priority date: 2015-03-11
Filing date: 2015-03-11
Publication date: 2015-06-10

Abstract

The invention provides an improved structure of a motor with an integral structure for an electric vehicle. The improved structure is that a housing of a reduction gearbox is divided into a left housing body and a right housing body; a bearing chamber is arranged in the left housing chamber; a bearing hole is formed in the wall of the right housing body; a medium bearing is arranged in the bearing hole; a front end bearing is arranged on the inner sidewall of the bearing chamber of the left housing body; the other end of a motor shaft of the motor passes through the medium bearing in the bearing hole and then extends into the bearing chamber to be connected to a front end 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 formed in an outer port of the cavity; a motor stator iron is in match with the spigot; a winding extending out from the stator iron core is arranged in the cavity; a screw passing through a rear end cover is fixed into a screw hole in the outer port of the cavity by a rotating manner. Compared with the prior art, the improved structure has the advantages of being compact in structure, small in noise, difficult to cause accumulated processing error, and small in size.

Description

There is the modified node method of the electric motor for electric vehicle of integral structure

Technical field:

The present invention relates to a kind of electric motor for electric vehicle, particularly reduction box and motor integrative-structure motor.

Background technology

At present, the reduction box of electric automobile and motor are all Split type structures, reduction box and motor are separate parts, auto vendor is all separately buying, Fig. 1 is shown in by primary structure, motor output shaft is splined shaft 1, electric motor end cap is processed with seam 2, seam 2 is concentric with splined shaft, motor end face is also processed with installation screw 3, during installation, is inserted by motor spline shaft in reduction box splined hole 4, electric motor end cap seam 2 coordinates with reduction box seam 5, is axially fixed on reduction box by motor through motor screw 3 with screw 6.During work, motor spline shaft drives reduction box pinion, realizes slowing down, increase moment of torsion object under gears meshing effect.This Split type structure Problems existing is as follows:

1, motor spline shaft coordinates the impact due to gap with gear box spline housing, and noise is large:

2, there is accumulation mismachining tolerance in motor spline shaft and motor end face seam, very easily causes interference;

3, motor is screwed on reduction box, there is the risk loosened;

4, electric motor end cap and the effect of reduction box casing bilayer thickness, makes complete machine axial length large, is unfavorable for that Integral automobile space is arranged.

Summary of the invention

The object of the invention be just to provide a kind of compact conformation, noise few, be not easy accumulation mismachining tolerance, the modified node method with the electric motor for electric vehicle of integral structure that volume is little.

The present invention seeks to realize like this: comprise the epitrochanterian motor shaft forming motor, with the stator core of winding, rear end cap and the reduction box with housing, wherein one end of the motor shaft of motor is connected on the bearing on rear end cap, wherein one end of stator core in motor abuts against on the seam on rear end cap, its special feature is that the housing forming reduction box is divided into left shell and right shell body, left shell is provided with bearing chamber, right shell body wall is provided with dead eye, intermediate bearing is provided with in dead eye, the bearing chamber madial wall of left shell is provided with front end bearing, the other end of the motor shaft of motor to stretch in bearing chamber through the intermediate bearing in dead eye and is connected on the front end bearing on left shell, the motor shaft being positioned at bearing chamber of the other end of motor shaft is fixed with pinion, the gears meshing of pinion and reduction box, the arranged outside of a wherein sidewall of bearing chamber has die cavity, die cavity external port is provided with seam, the seam that the other end of stator core in motor abuts against die cavity external port coordinates with this seam, the winding stretching out stator core is arranged in die cavity, through the screw rod of rear end cap spin be fixed on set by die cavity external port screw in.

The intermediate bearing be provided with in dead eye in oil enveloping structure or dead eye adopts the bearing with oil enveloping structure.

beneficial effect

1, there is not motor spline shaft and gear shaft spline fitted clearance issues, just there is no the noise that spline gaps brings yet;

2, axle need not process spline, and cost is low;

3, install simply, first reduction box can be assembled and refill stator, rotor;

4, motor eliminates front end housing, and cost reduces, and also have compressed axial space.

Accompanying drawing explanation

Fig. 1 is the structure chart of prior art;

Fig. 2 is the structure chart of the embodiment of the present invention 1;

Fig. 3 is the left view of Fig. 2.

In Fig. 2,3, sequence number illustrates: dead eye 16, gear 17, intermediate bearing 18, left shell 19 on screw 3b, the rear end cap edge through hole 8a at the bearing 9 on the front end bearing 5 on the seam 3a of motor shaft 1, pinion 2, die cavity 3, die cavity external port, oil sealing 4, bearing chamber 15, winding 6, stator core 7, rear end cap 8, rear end cap, screw rod 10, die cavity edge, the seam 8b of rear end cap, motor 11, rotor 12, right shell body 13, reduction box 14, bearing chamber 15, bearing chamber.

Embodiment:

Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail:

As Fig. 2, shown in 3, the present invention includes the motor shaft 1 on the rotor 12 forming motor 11, with the stator core 7 of winding 6, rear end cap 8 and the reduction box 14 with housing 13, wherein one end of the motor shaft 1 of motor 11 is connected on the bearing 9 on rear end cap 8, wherein one end of the stator core 7 of motor 11 abuts against on the seam 8b on rear end cap 8, its special feature is that the housing forming reduction box 14 is divided into left shell 19 and right shell body 13, left shell 19 is provided with bearing chamber 15, right shell body 13 wall is provided with dead eye 16, intermediate bearing 18 and oil sealing 4 is provided with in dead eye 16, bearing chamber 15 madial wall of left shell 19 is provided with front end bearing 5, the other end of the motor shaft 1 of motor 11 is through dead eye 16, intermediate bearing 18 and oil sealing 4 to stretch in bearing chamber 15 and are connected on the front end bearing 5 on left shell 19, the motor shaft 1 being positioned at bearing chamber 15 of the other end of motor shaft 1 is fixed with pinion 2, pinion 2 engages with the gear 17 of reduction box 14, the arranged outside of a wherein sidewall of bearing chamber 15 has die cavity 3, die cavity 3 external port is provided with seam 3a, the seam 3a that the other end of motor 11 stator core 7 abuts against die cavity 3 external port coordinates with this seam 3a, 6 windings stretching out stator core 7 are arranged in die cavity 3, through rear end cap 8 edge through hole 8a, in the screw rod 10 of stator core 7 spins and is fixed on set by die cavity 3 external port screw 3b.

Right shell body 13, die cavity 3 are that overall processing is out together.

operation principle

During installation, first by front end bearing 5, pinion 2, oil sealing 4, intermediate bearing 18 is affixed with the motor shaft 1 of rotor 12, pinion 2 loads reduction box through perforation and engages with gear 17, simultaneously, end bearing 5 is positioned on the left shell 19 of bearing chamber 15, the die cavity 3 seam 3a that stator core 7 enters housing is installed again, place rear end cap 8, rear end cap 8 seam 8b is coordinated with stator core 7, with screw rod 10, rear end cap 8 is compressed, make stator core 7 axially loaded fastening, during energising, rotor 12 rotates together with pinion 2, the engagement of pinion 2 driven gear 17 realizes slowing down, increase moment of torsion object.

Claims

1. there is the modified node method of the electric motor for electric vehicle of integral structure, comprise the epitrochanterian motor shaft forming motor, with the stator core of winding, rear end cap and the reduction box with housing, wherein one end of the motor shaft of motor is connected on the bearing on rear end cap, wherein one end of stator core in motor abuts against on the seam on rear end cap, it is characterized in that the housing forming reduction box is divided into left shell and right shell body, left shell is provided with bearing chamber, right shell body wall is provided with dead eye, intermediate bearing is provided with in dead eye, the bearing chamber madial wall of left shell is provided with front end bearing, the other end of the motor shaft of motor to stretch in bearing chamber through the intermediate bearing in dead eye and is connected on the front end bearing on left shell, the motor shaft being positioned at bearing chamber of the other end of motor shaft is fixed with pinion, the gears meshing of pinion and reduction box, the arranged outside of a wherein sidewall of bearing chamber has die cavity, die cavity external port is provided with seam, the seam that the other end of stator core in motor abuts against die cavity external port coordinates with this seam, the winding stretching out stator core is arranged in die cavity, through the screw rod of rear end cap spin be fixed on set by die cavity external port screw in.

2. the modified node method with the electric motor for electric vehicle of integral structure according to claim 1, is characterized in that the intermediate bearing be provided with in dead eye in oil enveloping structure or dead eye adopts the bearing with oil enveloping structure.

3. the modified node method with the electric motor for electric vehicle of integral structure according to claim 1 and 2, is characterized in that right shell body, die cavity is that overall processing is out together.