CN204493416U - A kind of driving motor of pure electric automobile axle - Google Patents
A kind of driving motor of pure electric automobile axle Download PDFInfo
- Publication number
- CN204493416U CN204493416U CN201520110126.4U CN201520110126U CN204493416U CN 204493416 U CN204493416 U CN 204493416U CN 201520110126 U CN201520110126 U CN 201520110126U CN 204493416 U CN204493416 U CN 204493416U
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- hollow shaft
- shaft section
- long hollow
- axle
- motor
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- Electric Propulsion And Braking For Vehicles (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A kind of driving motor of pure electric automobile axle, comprises long hollow shaft section, minor axis section; Long hollow shaft section outer wall is provided with straight knurling for press-fiting rotor silicon steel plate, its inwall left end is provided with internal spline; Minor axis section is stepped cylinder, comprise connect successively left small stair portion, in large stepped part, right small stair portion, left small stair portion is plugged in long hollow shaft section right-hand member, in large stepped part be installed in long hollow shaft section right-hand member, in large stepped part contact end face with long hollow shaft section and engage through welded seal, left small stair portion outer wall and long hollow shaft section inwall are interference fit.The utility model meets the requirement that motor bears positive and negative 96Nm moment of torsion for a long time, the IPX7 classification of waterproof simultaneously met the demands, namely outside water cannot enter motor internal by axle splined end, after adopting this axle, there is not the problem that two sections of axles are thrown off and ruptured again in motor shaft, the water-proof performance of axle also reaches technical requirements, decreases the use of bearing pin part simultaneously, and the utility model improves working life and the reliability of motor.
Description
Technical field
The utility model relates to driving motor of pure electric automobile technical field, specifically a kind of permanent-magnet synchronous driving motor axle.
Background technique
Driving motor of pure electric automobile axle is except supporting complete machine weight, and major function transmits the positive and negative moment of motor output, thus drive car load.
Drive motor axle moment passing interface generally adopts internal spline or external splines to coordinate, wherein internal spline mechanical processing technique generally adopts broaching tool or Gear Shaping, but gear shaping efficiency is low, so general internal spline adopts broaching tool technique, but broaching tool technique needs axle to be designed to hollow, need the security level requirement ensureing that motor is higher simultaneously, motor needs sealing, so motor shaft need be designed to two segment structures, one section hollow, is processed into internal spline, and one section solid, realize shaft sealing, then two sections of axles are connected into motor shaft.Connection place generally adopts interference fit to press-fit, and then welds.Because motor shaft needs to export positive reaction torque, therefore weld may need to bear larger positive and negative torsion, there is the fault that two sections of axles disconnect from weld or throw off, and when carrying out motor test and testing, this fault just repeatedly occurs.For increasing the motor shaft life-span, motor shaft two sections of junction generally also adopt pin shaft joint.
Summary of the invention
Goal of the invention of the present utility model is that avoiding two sections to weld axle weld is bearing positive and negative torsional interaction for a long time, and then the risk stopped two sections of axles disconnections or throw off, and improves working life and the reliability of motor.
The technical solution of the utility model is: comprise long hollow shaft section, minor axis section; Long hollow shaft section outer wall is provided with straight knurling for press-fiting rotor silicon steel plate, its inwall left end is provided with internal spline; Minor axis section is stepped cylinder, comprise connect successively left small stair portion, in large stepped part, right small stair portion, left small stair portion is plugged in long hollow shaft section right-hand member, in large stepped part be installed in long hollow shaft section right-hand member, in large stepped part contact end face with long hollow shaft section and engage through welded seal, left small stair portion outer wall and long hollow shaft section inwall are interference fit.
Described long hollow shaft section outer wall is also provided with the flange for positioning bearing.
In described, large stepped part outer wall flushes with long hollow shaft section outer wall.
Mounting hole is had, for tightening up the part measuring rotor-position signal, as rotary transformer rotor parts in described minor axis section right-hand member.
The utility model is by two sections of integral axles of axle erection welding, press-in silicon steel plate, and after assembling permanent-magnet steel, form Rotor Assembly, moment of torsion is exported by internal spline transmission.Two sections of axles: one section is output torque axle (hollow shaft), and its internal spline can adopt broaching tool to process, internal spline is easy to processing, and work efficiency is high; One section is non-output torque axle.The utility model is applied on driving motor of pure electric automobile axle, meet the requirement that motor bears positive and negative 96Nm moment of torsion for a long time, the IPX7 classification of waterproof simultaneously met the demands, namely outside water cannot enter motor internal by axle splined end, after adopting this axle, there is not the problem that two sections of axles are thrown off and ruptured in motor shaft, the water-proof performance of axle also reaches technical requirements, decreases the use of bearing pin part more simultaneously.
Accompanying drawing explanation
Fig. 1 is existing motor shaft structure schematic diagram.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is using state figure of the present utility model.
Embodiment
In Fig. 1, output torque axle (minor axis section) 2 ' is pressed into non-output torque axle (major axis section) 1 ', diaxon contact jaw 6 ' cylindrical welds, bearing pin 3 ' is loaded onto again on non-output torque axle 1 ' with the connection cylindrical of output torque axle 2 ', because output torque end is at left side internal spline 5 ', long-term positive and negative torsional interaction is all born by weld and bearing pin, causes bearing pin to come off, two sections of axles throw off and water inlet problem.Output torque axle 2 ' cylindrical has straight knurling 8 '.
In Fig. 2, the utility model motor shaft is two sections of assemble welding axles: one section is long hollow shaft section (output torque axle) 2, and cylindrical has longer straight knurling 8, for press-fiting rotor silicon steel plate, output torque axle left end is internal spline 5, and output torque axle right-hand member is major diameter fit; Another section is minor axis section (non-output torque axle) 1, and axle right-hand member is that axle supports, and left end is minor diameter fit.After two sections of axle inside and outside circle interference fit press-fit, carry out cylindrical welding, ensure the IPX7 classification of waterproof requirement of axle.IPX7 classification of waterproof is that motor shaft is placed in 1 meter of dark water, and water can not enter motor internal from axle, thus reduces electrical machine insulation grade, affect motor use.6 is two sections of axle welds, and 7 is two sections of axle Fits.
In Fig. 3, non-output torque axle 1 is pressed into output torque axle 2, and left small stair portion 7 outer wall and the long hollow shaft section inwall of non-output torque axle 1 are interference fit, and welding cylindrical, prevents junction from intaking.Tapped blind hole is had, for tightening up the part measuring rotor-position signal, as rotary transformer rotor parts in non-output torque axle 1 right-hand member.Silicon steel plate 4 is fitted in output torque axle 2 straight knurling 8 place, again at two end supports place press-in bearing, forming Rotor Assembly loads in motor, because Motor torque output terminal is at left side internal spline 5, the weld of contact end face 6 does not bear motor output torque substantially, only bear bearings power, therefore this place there will not be disengagement or disconnection problem.Output torque axle 2 be motor from output torque this section of axle, drive car load run.Non-output torque axle 1 is the other one section of axle of motor shaft, is mainly used in bearings.Rotor silicon steel plate 4 motor is used for form electromagnetic circuit, be that electric energy turns can be the pith of mechanical energy, is provided with permanent magnet in the silicon steel film trap of motor.
Claims (5)
1. a driving motor of pure electric automobile axle, is characterized in that: comprise long hollow shaft section, minor axis section; Long hollow shaft section outer wall is provided with straight knurling for press-fiting rotor silicon steel plate, its inwall left end is provided with internal spline; Minor axis section is stepped cylinder, comprise connect successively left small stair portion, in large stepped part, right small stair portion, left small stair portion is plugged in long hollow shaft section right-hand member, in large stepped part be installed in long hollow shaft section right-hand member, in large stepped part contact end face with long hollow shaft section and engage through welded seal, left small stair portion outer wall and long hollow shaft section inwall are interference fit.
2. driving motor of pure electric automobile axle according to claim 1, is characterized in that: described long hollow shaft section outer wall is also provided with the flange for positioning bearing.
3. driving motor of pure electric automobile axle according to claim 1, is characterized in that: in described, large stepped part outer wall flushes with long hollow shaft section outer wall.
4. driving motor of pure electric automobile axle according to claim 1, is characterized in that: have mounting hole in described minor axis section right-hand member.
5. driving motor of pure electric automobile axle according to claim 1, is characterized in that: described straight knurling is axial straight knurling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520110126.4U CN204493416U (en) | 2015-02-15 | 2015-02-15 | A kind of driving motor of pure electric automobile axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520110126.4U CN204493416U (en) | 2015-02-15 | 2015-02-15 | A kind of driving motor of pure electric automobile axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204493416U true CN204493416U (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520110126.4U Active CN204493416U (en) | 2015-02-15 | 2015-02-15 | A kind of driving motor of pure electric automobile axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204493416U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065425A (en) * | 2015-08-03 | 2015-11-18 | 福建永强力加动力设备有限公司 | Rotating shaft of electric generator |
| CN106763118A (en) * | 2016-11-28 | 2017-05-31 | 合普动力股份有限公司 | A kind of electric motor of automobile hollow shaft |
-
2015
- 2015-02-15 CN CN201520110126.4U patent/CN204493416U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065425A (en) * | 2015-08-03 | 2015-11-18 | 福建永强力加动力设备有限公司 | Rotating shaft of electric generator |
| CN105065425B (en) * | 2015-08-03 | 2018-06-08 | 福建永强力加动力设备有限公司 | Alternator shaft |
| CN106763118A (en) * | 2016-11-28 | 2017-05-31 | 合普动力股份有限公司 | A kind of electric motor of automobile hollow shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200430 Address after: 441000 Jiangshan South Road Venture Center, Xiangyang High-tech Zone, Hubei Province Patentee after: Dongfeng Power Drive System Co.,Ltd. Address before: 441000 No. 2, Spring Garden Road, hi tech Zone, Hubei, Xiangfan Patentee before: DONGFENG MOTOR ELECTRIC Co.,Ltd. |