CN110081152A - Electric axle for motor vehicles - Google Patents
Electric axle for motor vehicles Download PDFInfo
- Publication number
- CN110081152A CN110081152A CN201810073094.3A CN201810073094A CN110081152A CN 110081152 A CN110081152 A CN 110081152A CN 201810073094 A CN201810073094 A CN 201810073094A CN 110081152 A CN110081152 A CN 110081152A
- Authority
- CN
- China
- Prior art keywords
- main shaft
- gear
- bearing
- electric axle
- jackshaft
- 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
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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
-
- 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
- F16H57/0018—Shaft assemblies for gearings
- F16H57/0025—Shaft assemblies for gearings with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods
-
- 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
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
Abstract
The present invention relates to a kind of electric axles for motor vehicles.Electric axle includes input axle system, jackshaft system and differential system.Jackshaft system includes: main shaft；First gear is arranged on main shaft to receive driving torque from input axle system；Second gear is disposed adjacently on main shaft with first gear driving torque is passed to differential system；Bearing is mounted on main shaft in a manner of sandwiched first gear and second gear；And bearing position limiting structure, the end of main shaft is set and against bearing, bearing is positioned with the axial direction along main shaft.Electric axle of the invention has the advantages that be able to suppress axial gap generation.
Description
Technical field
The present invention relates to motor vehicle technology fields, more particularly, to the electric axle for motor vehicles.
Background technique
Currently, based on carbon emission and environmental-friendly demand is reduced, people are more likely to selection using electric vehicle or mix
Power car is closed to replace the motor vehicles using internal combustion engine as driving source.In this electric vehicle or hybrid vehicle, adopt
Electric axle generally includes input axle system, jackshaft system and differential system.Fig. 5 and Fig. 6 show the prior art
Jackshaft system cross-sectional view.As shown in Figure 5 and Figure 6, jackshaft system 200 includes main shaft 210 and is arranged on main shaft 210
First gear 220 and second gear 230, wherein first gear 220 be used for from input axle system receive driving torque, and
Second gear 230 is used to driving torque passing to differential system.In addition, jackshaft system 200 further includes being arranged in main shaft
The bearing 240 at 210 both ends.When driving torque is transmitted to jackshaft system 200 from input axle system, first gear 220 and the
It would generally be applied with axial force on two gears 230, and the axial force will make first gear 220 and second gear 230 along phase
Anti- direction axial movement, thus generates gap d, as shown in Figure 6 between gear 220 and 230.The gap d can then make axis
The certain axial float of 240 generations is held, generates noise in rotary course so as to will lead to bearing 240, or even can also damage
240 structure of bad bearing simultaneously influences 240 service life of bearing.
Therefore, it is necessary to a kind of electric axles for being able to suppress axial gap generation.
Summary of the invention
The object of the present invention is to provide a kind of electric axles for being able to suppress axial gap generation.
The present invention provides a kind of electric axle for motor vehicles comprising: input axle system, jackshaft system and difference
Fast device system.The jackshaft system includes: main shaft；First gear is arranged on the main shaft with from the input shafting
System receives driving torque；Second gear is disposed adjacently on the main shaft with the first gear to pass driving torque
Pass the differential system；Bearing is mounted on the master in a manner of the sandwiched first gear and the second gear
On axis；And bearing position limiting structure, the end of the main shaft is set and against the bearing, along the axis of the main shaft
It is positioned to the bearing.
According to an embodiment of the invention, the bearing position-limit mechanism is to project radially out the main shaft along the main shaft
Flange.
According to an embodiment of the invention, the flange be by along the main shaft it is axial to the main shaft carry out hot pressing come
It is molding.
According to an embodiment of the invention, the bearing position-limit mechanism is along the axially mounted to the main shaft of the main shaft
Bolt fastening structure.
According to an embodiment of the invention, the bolt fastening structure includes fixing bolt and is arranged in the fixing bolt
Gasket between the end side of the main shaft.
According to an embodiment of the invention, the first gear is arranged on the main shaft via spline connection.
According to an embodiment of the invention, the first gear is arranged on the main shaft via interference fit.
According to an embodiment of the invention, the second gear is integrally formed on the main shaft.
Electric axle of the invention is able to suppress the generation of axial gap, to eliminate the axial float of bearing, reduces
Noise when main shaft rotation, improves the service life of bearing.In addition, electric axle of the invention also have it is compact-sized,
The advantages that easy for installation.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the electric axle of embodiment according to the present invention.
Fig. 2A and Fig. 2 B is the cross-sectional view of the jackshaft system of embodiment according to the present invention, and which respectively show the first teeth
Wheel is installed to the explanatory view before and after main shaft via spline.
Fig. 3 A and Fig. 3 B are the cross-sectional views of jackshaft system according to another embodiment of the present invention, and which respectively show
One gear is installed to the explanatory view before and after main shaft via interference fit.
Fig. 4 is the cross-sectional view of jackshaft system according to still another embodiment of the invention.
Fig. 5 is the cross-sectional view of the jackshaft system of the prior art.
Fig. 6 is that there are cross-sectional views when axial gap for the jackshaft system of the prior art.
Specific embodiment
Hereinafter, embodiment of the invention will be described with reference to drawings.Following detailed description and drawings are for illustratively saying
Bright the principle of the present invention, the present invention is not limited to described preferred embodiment, the scope of the present invention is defined by the claims.It is existing
The embodiment the present invention is described in detail of reference example, some embodiments are illustrated in the drawings.Be described below with reference to attached drawing into
Row, unless otherwise indicated, otherwise same reference numerals in different figures represent same or similar element.Following exemplary
Scheme described in embodiment does not represent all schemes of the invention.On the contrary, these schemes are related in appended claims
And various aspects of the invention system and method example.
It is described below with reference to electric axle of the Fig. 1 to embodiment according to the present invention, wherein Fig. 1 is according to this
The cross-sectional view of the electric axle for motor vehicles of the embodiment of invention.As shown in Figure 1, electric axle 10 includes input shafting
System 100, jackshaft system 200 and differential system 300.
Input axle system 100 includes input shaft 110 and is arranged on input shaft 110 to rotate together with input shaft 110
Gear 120.Input shaft 110 for example may be integrally formed with gear 120.
The first gear 220 and second gear that jackshaft system 200 includes main shaft 210, is set side by side on main shaft 210
230 and by by first gear 220 and second gear 230 it is sandwiched therebetween in a manner of be mounted on bearing 240 on main shaft 210.The
One gear 220 is used to engage with the gear 120 of input axle system 100 to receive driving torque from input axle system 100.Second tooth
Wheel 230 is for passing to differential system 300 for driving torque.
Differential system 300 is including 310, two output axle shafts 320,330 of differential mechanism and is disposed therein an output
Gear 340 on semiaxis 320.Gear 340 for engaged with the second gear 230 of jackshaft system 200 with by driving torque from
Jackshaft system 200 is transmitted to differential mechanism 310.
In addition, motor 400 has as shown in Figure 1, electric axle 10 further includes the motor 400 for generating driving torque
It is coupled to the output shaft 410 of the input shaft 110 of input axle system 100.
Continue with the working principle for being described with reference to Figure 1 the electric axle 10 of embodiment according to the present invention.Work as electricity
When machine 400 is started to work, the output shaft 410 of motor 400 in driven input shaft system 100 input shaft 110 and gear 120 together
Rotation, then gear 120 drives main shaft 210 by engaging with the first gear 220 in jackshaft system 200 and is arranged in master
Second gear 230 on axis rotates together, subsequent second gear 230 by engaged with the gear 320 in differential system 300 come
Differential mechanism 310 is driven to rotate, differential mechanism 310 is then exported driving torque to wheel by two output axle shafts 320,330.Cause
The reduction and driving of the speed exported from motor 400 may be implemented by the electric axle of embodiment according to the present invention in this
The increase of torque.
It is carried out below with reference to jackshaft system of the Fig. 2 to Fig. 4 to the electric axle of embodiment according to the present invention detailed
Ground description, wherein Fig. 2 to Fig. 4 is the cross-sectional view of the jackshaft system of the electric axle of embodiment according to the present invention.
As described above, jackshaft system 200 includes main shaft 210, the first gear 220 being mounted on main shaft 210, the second tooth
Wheel 230 and bearing 240.
Main shaft 210 can be rotated around center axis thereof X-X '.Main shaft 210 can be hollow.
First gear 220 can be spur gear wheel or cylindric spiral gear.According to an embodiment of the invention, first gear
220 can be installed to main shaft 210 via spline.Fig. 2A and Fig. 2 B shows first gear 220 and is installed to main shaft 210 via spline
Jackshaft system 200 view, wherein Fig. 2A shows first gear 220 and is assembled to the schematic of main shaft 210 via spline
Cross-sectional view, and Fig. 2 B shows explanatory view of the first gear 220 before being assembled to main shaft 210.Such as Fig. 2A and Fig. 2 B
Shown, first gear 220 has internal spline, and main shaft 210 has external splines, and thus first gear 220 can be via interior flower
Key and external splines are engaged with each other to be installed to main shaft 210.Make 220 centering of splined main shaft 210 and first gear
Preferably, bearing capacity is high and works more reliable.
According to another embodiment of the present invention, first gear 220 can be installed to main shaft 210 via interference fit.Fig. 3 A
With Fig. 3 B show first gear 220 via interference fit be installed to main shaft 210 jackshaft system 200 view, wherein figure
3A shows schematic cross sectional views of the first gear 220 via interference fit to main shaft 210, and Fig. 3 B shows first
Explanatory view of the gear 220 before being assembled to main shaft 210.As shown in Figure 3A and Figure 3B, first gear 220 has and can cover
The through hole 221 being located on main shaft 210, and the diameter of through hole 221 be slightly less than or equal to main shaft 210 outer diameter, thus when
When first gear 220 is installed on main shaft 210 by means of through hole 221, it can be formed between through hole 221 and main shaft 210
It is full of cooperation.The main shaft 210 and 220 centering of first gear being connected to each other using interference fit are preferable, bearing capacity is high, work more
Reliable and structure is simpler.
Second gear 230 can be spur gear wheel or cylindric spiral gear.According to an embodiment of the invention, for example, such as Fig. 2
To shown in Fig. 4, second gear 230 can be integrally formed on main shaft 210, for example formed as the form of gear shaft.In this way,
The amount of parts in jackshaft system 200 can be reduced.But the present invention is not limited thereto.Those skilled in the art should manage
Solution, second gear can also be installed to main shaft 210 by known manners such as interference fit, splines.
Bearing 240 by by first gear 220 and second gear 230 it is sandwiched therebetween in a manner of be mounted on the two of main shaft 210
A end, to carry out axially position to first gear 220 and second gear 230.Bearing 240 can using tapered roller bearing,
One of angular contact ball bearing and other suitable bearings for being able to bear axial load or combination.It is shown in Fig. 1 to Fig. 4
The example of a tapered roller bearing is only used in each end of main shaft 210.But the present invention is not limited thereto.This field
It should be understood to the one skilled in the art that an angular contact ball bearing or taper roller can also be used respectively in each end of main shaft 210
Both bearing and angular contact ball bearing.
As shown in Figures 2 to 4, jackshaft system 200 further includes bearing position limiting structure, which is arranged in master
The end of axis 210 and against bearing 240, positions bearing 240 with the axial direction along main shaft 210.By in main shaft 210
End be arranged bearing position limiting structure, first gear 220, second gear 230 and bearing 240 can be maintained on main shaft 210,
Therefore gap can be generated along the axial of main shaft 210 to avoid first gear 220, second gear 230 and bearing 240, so as to
Inhibit noise caused by axial gap and service life reduction etc..
According to one embodiment of present invention, bearing position limiting structure, which can be, projects radially out main shaft 210 along main shaft 210
Flange 250.Flange 250 is integrally radially projecting from main shaft 210 in the end of main shaft 210.Flange 250 is against bearing 240
Inner ring, and the diameter of flange 250 be greater than bearing 240 inner ring internal diameter and be less than bearing 240 inner ring outer diameter.
Flange 250 is by carrying out hot-forming formed to main shaft 210 along the axial of main shaft 210.For example, by
After one gear 220, second gear 230 and bearing 240 are mounted on main shaft 210, along the axial to main shaft 210 of main shaft 210
End side 211 execute it is hot-forming, so as to form flange 250.By hot pressing molding flange 250 thickness it is more equal
It is even, so as to be positioned to bearing 240 more accurately.
The flange of embodiment according to the present invention can be such that first gear, second gear and bearing is axially fixed as a result,
On main shaft, displacement will not be generated each other because of axial force, to inhibit the generation of axial float.
According to another embodiment of the invention, bearing position-limit mechanism can be along the axially mounted to main shaft of main shaft 210
210 bolt fastening structure 260.Bolt fastening structure 260 can be mounted by screwing to the end side 211 of main shaft 210.Spiral shell
Bolt fixed structure 260 includes fixing bolt 261 and the gasket being arranged between fixing bolt 261 and the end side 211 of main shaft 210
262.The outer diameter of gasket 262 is greater than the internal diameter of the inner ring of bearing 240 and is less than the outer diameter of the inner ring of bearing 240.
The bolt fastening structure of embodiment according to the present invention can be by means of being threadedly engaged offer ratio with main shaft as a result,
Generated axial force is bigger between first gear and second gear preloads, therefore during the work of jackshaft system, can
First gear, second gear and bearing to be maintained on main shaft, so that it will not generate displacement each other because of axial force, to inhibit
The generation of axial float.
As previously mentioned, although exemplary embodiment of the present invention is illustrated by reference to attached drawing in explanation,
The present invention is not limited to above-mentioned specific embodiment, protection scope of the present invention should be limited by claims and its equivalents
It is fixed.
Claims (8)
1. a kind of electric axle for motor vehicles, including input axle system, jackshaft system and differential system, wherein
The jackshaft system includes:
Main shaft；
First gear is arranged on the main shaft to receive driving torque from the input axle system；
Second gear is disposed adjacently on the main shaft with the first gear driving torque is passed to the differential
Device system；
Bearing is mounted on the main shaft in a manner of the sandwiched first gear and the second gear；And
Bearing position limiting structure, is arranged in the end of the main shaft and against the bearing, with right along the axial direction of the main shaft
The bearing is positioned.
2. electric axle according to claim 1, wherein the bearing position-limit mechanism is along the radially projecting of the main shaft
In the flange of the main shaft.
3. electric axle according to claim 2, wherein the flange is by along the axial to the master of the main shaft
It is next molding that axis carries out hot pressing.
4. electric axle according to claim 1, wherein the bearing position-limit mechanism is along the axially mounted of the main shaft
To the bolt fastening structure of the main shaft.
5. electric axle according to claim 4, wherein the bolt fastening structure includes that fixing bolt and setting exist
Gasket between the fixing bolt and the end side of the main shaft.
6. electric axle according to claim 1, wherein the first gear is arranged via spline connection in the main shaft
On.
7. electric axle according to claim 1, wherein the first gear is arranged via interference fit in the main shaft
On.
8. electric axle according to claim 1, wherein the second gear is integrally formed on the main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073094.3A CN110081152A (en) | 2018-01-25 | 2018-01-25 | Electric axle for motor vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073094.3A CN110081152A (en) | 2018-01-25 | 2018-01-25 | Electric axle for motor vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110081152A true CN110081152A (en) | 2019-08-02 |
Family
ID=67412124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810073094.3A Pending CN110081152A (en) | 2018-01-25 | 2018-01-25 | Electric axle for motor vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110081152A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210362591A1 (en) * | 2020-02-19 | 2021-11-25 | Dana Automotive Systems Group, Llc | Electric drive axle gear train and method for manufacturing said gear train |
| CN114962596A (en) * | 2022-07-27 | 2022-08-30 | 四川丹齿精工科技有限公司 | Gear power transmission structure with high assembly probability |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4114747A (en) * | 1976-03-17 | 1978-09-19 | Fritz Eller | Switching bearing assembly for a motor-driven spindle |
| US20040161185A1 (en) * | 2001-03-12 | 2004-08-19 | Dirk-Olaf Leimann | Gear shaft bearing assembly |
| JP2008044425A (en) * | 2006-08-11 | 2008-02-28 | Jtekt Corp | Electric power steering device |
| CN203823002U (en) * | 2013-09-29 | 2014-09-10 | 中国振华集团久达机械厂 | Novel automobile reverse gear variable gear |
| CN203995678U (en) * | 2014-06-26 | 2014-12-10 | 比亚迪股份有限公司 | Power drive system and there is its vehicle |
| CN206072306U (en) * | 2016-09-29 | 2017-04-05 | 四川建安工业有限责任公司 | A kind of electric vehicle rear axle reduction device transmission shaft structure |
| CN107191547A (en) * | 2017-06-02 | 2017-09-22 | 中国航发南方工业有限公司 | Turbogenerator reduction gear box |
-
2018
- 2018-01-25 CN CN201810073094.3A patent/CN110081152A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4114747A (en) * | 1976-03-17 | 1978-09-19 | Fritz Eller | Switching bearing assembly for a motor-driven spindle |
| US20040161185A1 (en) * | 2001-03-12 | 2004-08-19 | Dirk-Olaf Leimann | Gear shaft bearing assembly |
| JP2008044425A (en) * | 2006-08-11 | 2008-02-28 | Jtekt Corp | Electric power steering device |
| CN203823002U (en) * | 2013-09-29 | 2014-09-10 | 中国振华集团久达机械厂 | Novel automobile reverse gear variable gear |
| CN203995678U (en) * | 2014-06-26 | 2014-12-10 | 比亚迪股份有限公司 | Power drive system and there is its vehicle |
| CN206072306U (en) * | 2016-09-29 | 2017-04-05 | 四川建安工业有限责任公司 | A kind of electric vehicle rear axle reduction device transmission shaft structure |
| CN107191547A (en) * | 2017-06-02 | 2017-09-22 | 中国航发南方工业有限公司 | Turbogenerator reduction gear box |
Non-Patent Citations (1)
| Title |
|---|
| 周王元, 东南大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210362591A1 (en) * | 2020-02-19 | 2021-11-25 | Dana Automotive Systems Group, Llc | Electric drive axle gear train and method for manufacturing said gear train |
| US11752861B2 (en) * | 2020-02-19 | 2023-09-12 | Dana Automotive Systems Group, Llc | Electric drive axle gear train and method for manufacturing said gear train |
| CN114962596A (en) * | 2022-07-27 | 2022-08-30 | 四川丹齿精工科技有限公司 | Gear power transmission structure with high assembly probability |
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