CN113187884A - Lubricating structure and vehicle of motor shaft and reduction gear axle - Google Patents
Lubricating structure and vehicle of motor shaft and reduction gear axle Download PDFInfo
- Publication number
- CN113187884A CN113187884A CN202110443663.0A CN202110443663A CN113187884A CN 113187884 A CN113187884 A CN 113187884A CN 202110443663 A CN202110443663 A CN 202110443663A CN 113187884 A CN113187884 A CN 113187884A
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- CN
- China
- Prior art keywords
- hole
- section
- shaft
- motor shaft
- reduction gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 14
- 230000009467 reduction Effects 0.000 title claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 53
- 239000010687 lubricating oil Substances 0.000 claims description 28
- 239000003921 oil Substances 0.000 claims description 22
- 238000005461 lubrication Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 230000009471 action Effects 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 6
- 239000000306 component Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a lubricating structure of a motor shaft and a reducer shaft and a vehicle, comprising the motor shaft with an external spline and the reducer shaft which is hollow and is provided with a shaft hole, wherein the motor shaft extends into the shaft hole of the reducer shaft to be matched with the reducer shaft spline; the axial section of the second section hole is conical, the large end of the second section hole is connected with the first section hole, and the small end of the second section hole is communicated with an oil guide assembly on the speed reducer. The structure is simple, the lubricating effect of the connecting position of the motor shaft and the reducer shaft can be ensured, and the safety of the vehicle is improved.
Description
Technical Field
The invention relates to the technical field of connecting equipment of a driving motor and a speed reducer of an electric automobile, in particular to a lubricating structure of a motor shaft and a speed reducer shaft and a vehicle.
Background
The electric drive is a power source for the action of the pure electric vehicle, is used for providing power for the normal running of the vehicle, and is a core component of the pure electric vehicle. The high-integration electric drive mainly comprises a motor, a speed reducer, a controller and the like, wherein the spline is a power transmission interface between the motor and the speed reducer and is used for transmitting the power output of the motor to the speed reducer.
At present, highly integrated electrically driven motors and speed reducer connection spline lubrication mainly rely on an oil passage of a speed reducer box body to collect internal splash lubricating oil, and gravity is guided to a spline pair for lubrication. This conventional lubrication method has the following disadvantages: 1. collected lubricating oil is easy to run off from the clearance of the bearing, and less lubricating oil enters the spline pair. 2. Lubricating oil flows into the spline pair by means of gravity, and the flow speed is low. The defects easily cause the faults of abnormal abrasion of the spline, rapid temperature rise of a motor shaft and the like caused by poor lubrication of the electrically driven spline. Abnormal wear of the electric drive spline causes abnormal sound of the whole vehicle, and severe persons show power interruption faults. And the rapid temperature rise of the motor shaft accelerates the aging of a plastic sealing element, so that the sealing failure of the motor is caused, and functional safety faults such as short circuit, fire and the like of the motor are caused, thereby influencing the life safety of driving and passengers.
Therefore, the novel lubricating mode is adopted to solve the problems of abnormal sound, power interruption, motor short circuit and the like caused by insufficient lubrication of the electric driving spline, and is very important for improving the safety of the vehicle.
Disclosure of Invention
The invention aims to provide a lubricating structure of a motor shaft and a speed reducer shaft, which is simple in structure, can ensure the lubricating effect of the connecting position of the motor shaft and the speed reducer shaft and improve the safety of a vehicle.
The lubricating structure of the motor shaft and the reducer shaft comprises the motor shaft with an external spline and the reducer shaft which is hollow and is provided with a shaft hole, wherein the motor shaft extends into the shaft hole of the reducer shaft to be matched with the spline of the reducer shaft; the axial section of the second section hole is conical, the large end of the second section hole is connected with the first section hole, the small end of the second section hole is communicated with an oil guide assembly on the speed reducer, the oil guide assembly guides lubricating oil into the second section hole of the speed reducer shaft, and the lubricating oil moves to the first section hole along the hole wall of the second section hole under the action of the conical second section hole to lubricate the connection position of the motor shaft and the speed reducer shaft.
Further, lead oily subassembly for locating the oil groove of leading on the reduction gear casing.
Further, a seal ring for preventing lubricating oil from flowing to the motor side is arranged between the motor shaft and the reducer shaft.
Furthermore, a guide inclined plane is arranged between the first section of hole and the second section of hole, and two ends of the guide inclined plane are respectively connected with the end parts of the first section of hole and the second section of hole in a smooth transition mode.
A vehicle comprises the lubricating structure of the motor shaft and the reducer shaft.
Compared with the prior art, the invention has the following beneficial effects.
1. According to the invention, the lubricating oil is guided to flow into the second section of hole of the speed reducer shaft through the oil guide assembly on the speed reducer, then the lubricating oil is enabled to move to the first section of hole along the hole wall of the second section of hole under the action of the conical second section of hole, so that the sufficient lubrication of the connecting position of the motor shaft and the speed reducer shaft is ensured, the heat generated by the work of the electrically-driven spline pair is rapidly cooled, the safety faults of abnormal sound, power interruption, motor short circuit and the like of a vehicle caused by insufficient lubrication of the electrically-driven spline are effectively solved, and the safety of the vehicle is improved.
2. The oil guide assembly is arranged on the speed reducer, the position and the shape of the oil guide assembly can be adjusted timely according to actual conditions, and compared with the oil inlet arranged on the speed reducer shaft, the oil guide assembly is better in adaptability and less in influence on the structure of the speed reducer shaft, and the structural performance of the speed reducer shaft can meet requirements.
3. According to the invention, the guide inclined plane is arranged between the first section of hole and the second section of hole, and the guide inclined plane effectively prevents lubricating oil from being accumulated at the connecting position of the second section of hole and the first section of hole, so that the lubricating oil flows more smoothly, and the lubricating effect of the electric driving spline pair is further improved.
Drawings
FIG. 1 is a schematic structural view of the invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic flow diagram of the lubricating oil of the present invention;
FIG. 4 is a schematic view of the force analysis of the lubricating oil in the first segment of the hole.
In the figure, 1-motor shaft, 11-external spline, 2-reducer shaft, 21-shaft hole, 22-first section hole, 23-second section hole, 24-internal spline, 3-oil guide assembly, 4-reducer shell, 5-lubricating oil, 6-sealing ring.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the lubricating structure of the motor shaft and the reducer shaft includes a motor shaft 1 provided with an external spline 11 and a hollow reducer shaft 2 provided with a shaft hole 21, the motor shaft 1 extends into the shaft hole 21 of the reducer shaft 2 to be in spline fit with the reducer shaft 2, the shaft hole 21 includes a first section hole 22 and a second section hole 23 which are communicated with each other, and an internal spline 24 corresponding to the external spline 11 on the motor shaft 1 is arranged on the inner wall of the first section hole 22. The axial section of the second section of hole 23 is conical, the large end of the second section of hole 23 is connected with the first section of hole 22, and the small end of the second section of hole 23 is communicated with the oil guide assembly 3 on the speed reducer. Specifically, the oil guiding assembly 3 is an oil guiding groove disposed on the reducer casing 4. The oil guide assembly 3 guides the lubricating oil 5 into the second section of hole 23 of the speed reducer shaft 2, and under the action of the tapered second section of hole 23, the lubricating oil 5 moves to the first section of hole 22 along the hole wall of the second section of hole 23 to lubricate the connecting position of the motor shaft 1 and the speed reducer shaft 2.
Be provided with between motor shaft 1 and the reduction gear axle 2 and be used for preventing 5 sealing washers 6 of flow direction motor sides of lubricating oil, the setting of sealing washers 6 has effectively prevented 5 flow direction motors of lubricating oil in the reduction gear axle 2 to prevent to reveal.
Be equipped with direction inclined plane 25 between first section hole 22 and the second section hole 23, this direction inclined plane 25 both ends respectively with the tip smooth transition connection in first section hole 22 and second section hole 23, the setting up of direction inclined plane 25 has effectively avoided lubricating oil 5 to pile up at the hookup location of second section hole 23 and first section hole 22 for lubricating oil 5 flows more smoothly, and then has improved the vice lubricated effect of electricity driving spline.
In specific operation, referring to fig. 3 and 4, the reducer shaft 2 and the motor shaft 1 rotate at high speed through the spline pair, i.e. the internal spline 24 and the external spline 11, which are matched with each other, and the oil guide assembly 3 on the reducer housing 4 directly guides the collected lubricating oil 5 to flow into the second section hole 23 of the shaft hole 21 of the reducer shaft 2, so that the oil guide path is short, the loss is small, and the oil guide efficiency is high. Because the axial section of the second section of hole 23 is conical, the large end of the second section of hole 23 is connected with the first section of hole 22, the small end of the second section of hole 23 is communicated with the oil guide component 3 on the speed reducer, and the inflowing lubricating oil 5 can cling to the hole wall of the second section of hole 23 to rotate together under the action of centrifugal force. The shaft hole 21 of the speed reducer shaft 2 generates a reaction force F to the lubricating oil 5 under the action of centrifugal force, the reaction force F generates a horizontal component force Fa to the lubricating oil 5 under the action of a cone, the lubricating oil 5 moves to the first section hole 22 along the hole wall of the second section hole 23 under the action of the horizontal component force Fa, the sufficient lubrication of the connecting position of the motor shaft 1 and the speed reducer shaft 2 is ensured, the heat generated by the work of the electric drive spline pair is rapidly cooled, the safety faults of abnormal sound, power interruption, motor short circuit and the like of a vehicle caused by insufficient lubrication of the electric drive spline are effectively solved, and the safety of the vehicle is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a lubricating structure of motor shaft and reduction gear axle, is including motor shaft (1) and the cavity that is provided with external splines (11) and reduction gear axle (2) that just is provided with shaft hole (21), and in shaft hole (21) that motor shaft (1) stretched into reduction gear axle (2) with reduction gear axle (2) spline fit, its characterized in that: the shaft hole (21) comprises a first section of hole (22) and a second section of hole (23) which are communicated with each other, and an inner spline (24) correspondingly matched with an outer spline (11) on the motor shaft (1) is arranged on the inner wall of the first section of hole (22); second section hole (23) axial cross-section is the toper, and the main aspects of second section hole (23) are connected with first section hole (22), and the tip of second section hole (23) leads oil component (3) intercommunication on with the reduction gear, lead in oil component (3) with the leading-in second section hole (23) of lubricating oil (5) to the reduction gear axle (2), make lubricating oil (5) move to first section hole (22) along the pore wall of second section hole (23) under the effect of conical second section hole (23), lubricate motor shaft (1) and reduction gear axle (2) hookup location.
2. The lubrication structure of a motor shaft and a reducer shaft according to claim 1, wherein: and the oil guide assembly (3) is an oil guide groove arranged on the speed reducer shell (4).
3. The lubrication structure of a motor shaft and a reducer shaft according to claim 1 or 2, wherein: a sealing ring (6) used for preventing lubricating oil (5) from flowing to the motor side is arranged between the motor shaft (1) and the speed reducer shaft (2).
4. The lubrication structure of a motor shaft and a reducer shaft according to claim 1 or 2, wherein: a guide inclined plane (25) is arranged between the first section of hole (22) and the second section of hole (23), and two ends of the guide inclined plane (25) are respectively connected with the first section of hole (22) and the second section of hole (23) in a smooth transition mode.
5. A vehicle, characterized in that: a lubricating structure including the motor shaft and the reducer shaft according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110443663.0A CN113187884A (en) | 2021-04-23 | 2021-04-23 | Lubricating structure and vehicle of motor shaft and reduction gear axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110443663.0A CN113187884A (en) | 2021-04-23 | 2021-04-23 | Lubricating structure and vehicle of motor shaft and reduction gear axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113187884A true CN113187884A (en) | 2021-07-30 |
Family
ID=76978318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110443663.0A Pending CN113187884A (en) | 2021-04-23 | 2021-04-23 | Lubricating structure and vehicle of motor shaft and reduction gear axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113187884A (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3785458A (en) * | 1972-04-14 | 1974-01-15 | Caterpillar Tractor Co | Lubrication system for a gear drive mechanism |
| JPH07190176A (en) * | 1993-12-24 | 1995-07-28 | Hitachi Constr Mach Co Ltd | Power transmission |
| JP2000161473A (en) * | 1998-11-27 | 2000-06-16 | Ebara Corp | Lubricating oil supply mechanism for transmission device of arm shaft bevel gear |
| JP2004360726A (en) * | 2003-06-02 | 2004-12-24 | Toyota Motor Corp | Electric drive unit |
| US20080251324A1 (en) * | 2007-04-10 | 2008-10-16 | Aisin Ai Co., Ltd | Lubricating structure for transmission |
| CN101803152A (en) * | 2007-09-10 | 2010-08-11 | 株式会社小松制作所 | Power unit |
| CN202646648U (en) * | 2012-06-08 | 2013-01-02 | 三一重工股份有限公司 | Transfer case and engineering machinery |
| US20130247550A1 (en) * | 2012-03-26 | 2013-09-26 | Zf Friedrichshafen Ag | Arrangement for oil-supply of an add-on module |
| CN103671853A (en) * | 2012-09-18 | 2014-03-26 | 南车戚墅堰机车车辆工艺研究所有限公司 | Lubricating structure of rotating spline |
| US20140274420A1 (en) * | 2013-03-13 | 2014-09-18 | Hamilton Sundstrand Corporation | Spline lubrication system |
| US20170001513A1 (en) * | 2014-01-08 | 2017-01-05 | Ntn Corporation | In-wheel motor drive device |
| US20180051794A1 (en) * | 2015-06-08 | 2018-02-22 | Komatsu Ltd. | Power transmission device and work vehicle provided with power transmission device |
| US20180135740A1 (en) * | 2015-11-12 | 2018-05-17 | Komatsu Ltd. | Lubricating apparatus |
| JP2018155386A (en) * | 2017-03-21 | 2018-10-04 | トヨタ自動車株式会社 | Lubrication structure of power transmission device |
| DE102018101641B3 (en) * | 2018-01-25 | 2019-01-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Device for cooling a rotor shaft of an electric motor |
| CN212627445U (en) * | 2020-07-24 | 2021-02-26 | 重庆长安新能源汽车科技有限公司 | Structure for preventing lubricating oil from permeating into driving motor |
-
2021
- 2021-04-23 CN CN202110443663.0A patent/CN113187884A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3785458A (en) * | 1972-04-14 | 1974-01-15 | Caterpillar Tractor Co | Lubrication system for a gear drive mechanism |
| JPH07190176A (en) * | 1993-12-24 | 1995-07-28 | Hitachi Constr Mach Co Ltd | Power transmission |
| JP2000161473A (en) * | 1998-11-27 | 2000-06-16 | Ebara Corp | Lubricating oil supply mechanism for transmission device of arm shaft bevel gear |
| JP2004360726A (en) * | 2003-06-02 | 2004-12-24 | Toyota Motor Corp | Electric drive unit |
| US20080251324A1 (en) * | 2007-04-10 | 2008-10-16 | Aisin Ai Co., Ltd | Lubricating structure for transmission |
| CN101803152A (en) * | 2007-09-10 | 2010-08-11 | 株式会社小松制作所 | Power unit |
| US20110001400A1 (en) * | 2007-09-10 | 2011-01-06 | Komatsu Ltd. | Power Unit |
| US20130247550A1 (en) * | 2012-03-26 | 2013-09-26 | Zf Friedrichshafen Ag | Arrangement for oil-supply of an add-on module |
| CN202646648U (en) * | 2012-06-08 | 2013-01-02 | 三一重工股份有限公司 | Transfer case and engineering machinery |
| CN103671853A (en) * | 2012-09-18 | 2014-03-26 | 南车戚墅堰机车车辆工艺研究所有限公司 | Lubricating structure of rotating spline |
| US20140274420A1 (en) * | 2013-03-13 | 2014-09-18 | Hamilton Sundstrand Corporation | Spline lubrication system |
| US20170001513A1 (en) * | 2014-01-08 | 2017-01-05 | Ntn Corporation | In-wheel motor drive device |
| US20180051794A1 (en) * | 2015-06-08 | 2018-02-22 | Komatsu Ltd. | Power transmission device and work vehicle provided with power transmission device |
| US20180135740A1 (en) * | 2015-11-12 | 2018-05-17 | Komatsu Ltd. | Lubricating apparatus |
| JP2018155386A (en) * | 2017-03-21 | 2018-10-04 | トヨタ自動車株式会社 | Lubrication structure of power transmission device |
| DE102018101641B3 (en) * | 2018-01-25 | 2019-01-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Device for cooling a rotor shaft of an electric motor |
| CN212627445U (en) * | 2020-07-24 | 2021-02-26 | 重庆长安新能源汽车科技有限公司 | Structure for preventing lubricating oil from permeating into driving motor |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210730 |
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