WO2016156472A1 - Torque transfer device for electric machine rotor and electric machine thereof - Google Patents
Torque transfer device for electric machine rotor and electric machine thereof Download PDFInfo
- Publication number
- WO2016156472A1 WO2016156472A1 PCT/EP2016/057030 EP2016057030W WO2016156472A1 WO 2016156472 A1 WO2016156472 A1 WO 2016156472A1 EP 2016057030 W EP2016057030 W EP 2016057030W WO 2016156472 A1 WO2016156472 A1 WO 2016156472A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- electric machine
- shaft
- gear
- connecting key
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
- F16D1/116—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/102—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via polygon shaped connections
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
Definitions
- the present application relates to the technical field of motor vehicles, in particular to a torque transfer device for an electric machine rotor and an electric machine thereof.
- an electric machine for driving a wheel system of a motor vehicle such as an electric automobile or a hybrid automobile
- electricity generally has an output gear to transfer torque from a rotor shaft to external equipment (such as a speed reducer or a transmission) .
- the output gear is generally arranged on an end of the rotor shaft directly, to establish a connection between the output gear and the rotor shaft of the electric machine, thereby enabling torque generated by the rotor of the electric machine to be transferred to external equipment via the output gear.
- the diameter of the addendum circle of the output gear is limited by the bearing neck of the rotor shaft, so the flexibility of design of the electrically driven wheel system is reduced.
- the present application provides a torque transfer device for an electric machine rotor, the device comprising a gear shaft on which is provided an external connecting key; a rotor shaft on which is provided an internal connecting key; wherein the external connecting key mates with the internal connecting key in a nested manner, so as to connect the gear shaft to the rotor shaft circumferentially .
- an output gear is provided on the gear shaft; the rotor shaft is connected to a rotor; wherein the output gear is meshed with a gear on a speed reducer or transmission, so that torque generated by the rotor is transferred to the speed reducer or transmission .
- the external connecting key is an external spline or an external polygon profile key; the internal connecting key is an internal spline or an internal polygon profile key.
- a spring clip is provided at that end of the gear shaft which mates with the rotor shaft, to enable the gear shaft to carry an axial force from the output gear.
- the gear shaft and the rotor shaft are both provided with a groove structure; the spring clip mates with the groove structures on the gear shaft and the rotor shaft and thereby connects the gear shaft and the rotor shaft together in an axial direction .
- the present application also provides an electric machine com- prising the torque transfer device for an electric machine rotor described above.
- the torque transfer device for an electric machine rotor and the electric machine thereof have at least the following advantages: the gear shaft and the rotor shaft are connected together cir ⁇ cumferentially by means of nested mating of the external connecting key on the gear shaft with the internal connecting key on the rotor shaft, to transfer torque generated by the rotor of the electric machine; the technical solution of the present application places no restrictions on the diameters of the gear shaft and the output gear, therefore gear shafts of different sizes may be employed to mate with the rotor shaft, so that the design of the electrically driven wheel system has a higher level of flexibility.
- Fig. 1 shows an exploded view of an electric machine according to a particular embodiment of the present application.
- Fig. 2 shows a sectional view of an electric machine according to a particular embodiment of the present application.
- Fig. 3 shows a view along section A-A in Fig. 2.
- Fig. 1 shows an exploded view of an electric machine according to a particular embodiment of the present application.
- Figs. 2 and 3 show sectional views of an electric machine according to a particular embodiment of the present application.
- the electric machine comprises a gear shaft 1, a rotor 3 having a rotor shaft 2, and a spring clip 4.
- An external connecting key la and an output gear lb are provided on the gear shaft 1.
- An internal connecting key 2a is provided on the rotor shaft 2 of the electric machine, wherein the external connecting key la on the gear shaft 1 and the internal connecting key 2a on the rotor shaft 2 mate with each other (e.g.
- the gear shaft 1 and rotor shaft 2 form the torque transfer device for an electric machine rotor of the present application.
- the output gear lb is used to mesh with another gear (e.g. a gear on a speed reducer or transmission) , and thereby transfer torque to external equipment (e.g. a speed reducer or transmission) .
- the present application can employ gear shafts 1 of different sizes to mate with the rotor shaft 2, with no restriction on the diameters of the gear shaft 1 and the output gear lb, so that the design of the electrically driven wheel system has a higher level of flexibility.
- the external connecting key la on the gear shaft 1 may be an outer spline or an outer polygon profile key; correspondingly, the internal connecting key 2a on the rotor shaft 2 which mates therewith may be an internal spline or an internal polygon profile key.
- Those skilled in the art could also employ connecting keys of another type to connect the gear shaft and the rotor shaft together according to actual requirements; these variations do not depart from the scope of protection of the present application.
- the electric machine of the present application may also comprise a spring clip 4; the spring clip 4 is provided at that end of the gear shaft 1 which mates with the rotor shaft 2, to enable the gear shaft 1 to carry an axial force from the output gear lb.
- the gear shaft 1 and the rotor shaft 2 are both provided with a groove structure; the spring clip 4 mates with the groove structures on the gear shaft 1 and the rotor shaft 2 and thereby connects the gear shaft 1 and the rotor shaft 2 together in an axial direction, to enable the gear shaft 1 to carry an axial force from the output gear lb.
- Those skilled in the art could also locate the gear shaft in the axial direction in another way according to actual requirements; these variations do not depart from the scope of protection of the present application.
- the electric machine of the present application may for example be used for driving a wheel system of a motor vehicle by electricity. However, those skilled in the art will appreciate that the electric machine of the present application could also be used to drive another system comprising a wheel system.
- the gear shaft and the rotor shaft are connected together circumferentially by means of nested mating of the external connecting key on the gear shaft with the internal connecting key on the rotor shaft, to transfer torque generated by the rotor of the electric machine.
- gear shafts of different sizes may be employed to mate with the rotor shaft, so that the design of the electrically driven wheel system has a higher level of flexibility, and the size of the output gear can be changed flexibly so that the same driven wheel system platform can realize different applications.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The present application relates to a torque transfer device for an electric machine rotor, wherein the device comprises a gear shaft on which is provided an external connecting key; a rotor shaft on which is provided an internal connecting key; wherein the external connecting key mates with the internal connecting key in a nested manner, so as to connect the gear shaft to the rotor shaft circumferentially. The present application also relates to an electric machine comprising the device. In the technical solution of the present application, no restrictions are placed on the diameters of the gear shaft and the output gear, therefore gear shafts of different sizes may be employed to mate with the rotor shaft, so that the design of the electrically driven wheel system has a higher level of flexibility.
Description
Description
Torque transfer device for electric machine rotor and electric machine thereof
Technical field
The present application relates to the technical field of motor vehicles, in particular to a torque transfer device for an electric machine rotor and an electric machine thereof.
Background art
In the prior art, an electric machine for driving a wheel system of a motor vehicle (such as an electric automobile or a hybrid automobile) by electricity generally has an output gear to transfer torque from a rotor shaft to external equipment (such as a speed reducer or a transmission) . At present, the output gear is generally arranged on an end of the rotor shaft directly, to establish a connection between the output gear and the rotor shaft of the electric machine, thereby enabling torque generated by the rotor of the electric machine to be transferred to external equipment via the output gear. However, in that solution, due to limitations of the installation process, the diameter of the addendum circle of the output gear is limited by the bearing neck of the rotor shaft, so the flexibility of design of the electrically driven wheel system is reduced. Content of the application
To solve the above problem, the present application provides a torque transfer device for an electric machine rotor, the device comprising a gear shaft on which is provided an external connecting key; a rotor shaft on which is provided an internal connecting key; wherein the external connecting key mates with the internal
connecting key in a nested manner, so as to connect the gear shaft to the rotor shaft circumferentially .
Optionally, an output gear is provided on the gear shaft; the rotor shaft is connected to a rotor; wherein the output gear is meshed with a gear on a speed reducer or transmission, so that torque generated by the rotor is transferred to the speed reducer or transmission . Optionally, the external connecting key is an external spline or an external polygon profile key; the internal connecting key is an internal spline or an internal polygon profile key.
Optionally, a spring clip is provided at that end of the gear shaft which mates with the rotor shaft, to enable the gear shaft to carry an axial force from the output gear.
Optionally, the gear shaft and the rotor shaft are both provided with a groove structure; the spring clip mates with the groove structures on the gear shaft and the rotor shaft and thereby connects the gear shaft and the rotor shaft together in an axial direction .
The present application also provides an electric machine com- prising the torque transfer device for an electric machine rotor described above.
Compared with the prior art, the torque transfer device for an electric machine rotor and the electric machine thereof according to the present application have at least the following advantages: the gear shaft and the rotor shaft are connected together cir¬ cumferentially by means of nested mating of the external connecting key on the gear shaft with the internal connecting key on the rotor shaft, to transfer torque generated by the rotor of the electric machine; the technical solution of the present application places no restrictions on the diameters of the gear shaft and the output gear, therefore gear shafts of different sizes may be employed to
mate with the rotor shaft, so that the design of the electrically driven wheel system has a higher level of flexibility.
Description of the accompanying drawings
Fig. 1 shows an exploded view of an electric machine according to a particular embodiment of the present application.
Fig. 2 shows a sectional view of an electric machine according to a particular embodiment of the present application.
Fig. 3 shows a view along section A-A in Fig. 2.
Particular embodiments
A torque transfer device for an electric machine rotor and an electric machine thereof according to embodiments of the present application are described below with reference to the accompanying drawings. In the following description, many specific details are expounded in order to give those skilled in the art a more comprehensive understanding of the present application. However, it will be obvious to those skilled in the art that some of these specific details may be omitted in the implementation of the present application. Moreover, it should be appreciated that the present application is not limited to the specific embodiments presented. On the contrary, one could consider using any combination of the following features and key elements to implement the present application, regardless of whether they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages serve merely an explanatory purpose and should not be regarded as key elements or limitations of the claims, unless clearly mentioned in the claims.
Fig. 1 shows an exploded view of an electric machine according to a particular embodiment of the present application. Figs. 2 and 3 show sectional views of an electric machine according to a particular embodiment of the present application. As shown in Figs.
1-3, the electric machine comprises a gear shaft 1, a rotor 3 having a rotor shaft 2, and a spring clip 4. An external connecting key la and an output gear lb are provided on the gear shaft 1. An internal connecting key 2a is provided on the rotor shaft 2 of the electric machine, wherein the external connecting key la on the gear shaft 1 and the internal connecting key 2a on the rotor shaft 2 mate with each other (e.g. mate in a nested manner) and thereby connect the gear shaft 1 and the rotor shaft 2 together circumferentially, to transfer torque generated by the rotor of the electric machine. The gear shaft 1 and rotor shaft 2 form the torque transfer device for an electric machine rotor of the present application. The output gear lb is used to mesh with another gear (e.g. a gear on a speed reducer or transmission) , and thereby transfer torque to external equipment (e.g. a speed reducer or transmission) . Through the provision of connecting keys of different shapes and sizes on the gear shaft 1 and the rotor shaft 2, the present application can employ gear shafts 1 of different sizes to mate with the rotor shaft 2, with no restriction on the diameters of the gear shaft 1 and the output gear lb, so that the design of the electrically driven wheel system has a higher level of flexibility.
In the present application, the external connecting key la on the gear shaft 1 may be an outer spline or an outer polygon profile key; correspondingly, the internal connecting key 2a on the rotor shaft 2 which mates therewith may be an internal spline or an internal polygon profile key. Those skilled in the art could also employ connecting keys of another type to connect the gear shaft and the rotor shaft together according to actual requirements; these variations do not depart from the scope of protection of the present application.
Further, as shown in Figs . 1 - 3 , the electric machine of the present application may also comprise a spring clip 4; the spring clip 4 is provided at that end of the gear shaft 1 which mates with the rotor shaft 2, to enable the gear shaft 1 to carry an axial force from the output gear lb. Specifically, the gear shaft 1 and the rotor shaft 2 are both provided with a groove structure; the spring clip
4 mates with the groove structures on the gear shaft 1 and the rotor shaft 2 and thereby connects the gear shaft 1 and the rotor shaft 2 together in an axial direction, to enable the gear shaft 1 to carry an axial force from the output gear lb. Those skilled in the art could also locate the gear shaft in the axial direction in another way according to actual requirements; these variations do not depart from the scope of protection of the present application.
The electric machine of the present application may for example be used for driving a wheel system of a motor vehicle by electricity. However, those skilled in the art will appreciate that the electric machine of the present application could also be used to drive another system comprising a wheel system. In the electric machine of the present application, the gear shaft and the rotor shaft are connected together circumferentially by means of nested mating of the external connecting key on the gear shaft with the internal connecting key on the rotor shaft, to transfer torque generated by the rotor of the electric machine. The technical solution of the present application places no re¬ strictions on the diameters of the gear shaft and the output gear, therefore gear shafts of different sizes may be employed to mate with the rotor shaft, so that the design of the electrically driven wheel system has a higher level of flexibility, and the size of the output gear can be changed flexibly so that the same driven wheel system platform can realize different applications.
Although the present application has been disclosed above by way of preferred embodiments, it is by no means limited to this. Various changes and amendments made by any person skilled in the art without departing from the spirit and scope of the present application shall be included in the scope of protection of the present application. Thus the scope of protection of the present application shall be the scope defined by the claims.
Claims
1. A torque transfer device for an electric machine rotor, characterized by comprising:
a gear shaft (1) on which is provided an external connecting key (la) ;
a rotor shaft (2) on which is provided an internal connecting key (2a) ;
wherein the external connecting key (la) mates with the internal connecting key (2a) in a nested manner, so as to connect the gear shaft (1) to the rotor shaft (2) circumferentially .
2. The device as claimed in claim 1, characterized in that an output gear (lb) is provided on the gear shaft (1);
the rotor shaft (2) is connected to a rotor (3) ;
wherein the output gear (lb) is meshed with a gear on a speed reducer or transmission, so that torque generated by the rotor (3) is transferred to the speed reducer or transmission.
3. The device as claimed in claim 1, characterized in that the external connecting key (la) is an external spline or an external polygon profile key;
the internal connecting key (2a) is an internal spline or an internal polygon profile key.
4. The device as claimed in claim 1, characterized in that a spring clip (4) is provided at that end of the gear shaft (1) which mates with the rotor shaft (2) , to enable the gear shaft (1) to carry an axial force from the output gear (lb) .
5. The device as claimed in claim 4, characterized in that the gear shaft (1) and the rotor shaft (2) are both provided with a groove structure; the spring clip (4) mates with the groove structures on the gear shaft (1) and the rotor shaft (2) and thereby connects the gear shaft (1) and the rotor shaft (2) together in an axial direction.
6. An electric machine, characterized by comprising the torque transfer device for an electric machine rotor as claimed in any one of claims 1 - 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520194913.1 | 2015-04-02 | ||
| CN201520194913.1U CN204517563U (en) | 2015-04-02 | 2015-04-02 | The torque transmitter of rotor and motor thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016156472A1 true WO2016156472A1 (en) | 2016-10-06 |
Family
ID=53715495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2016/057030 WO2016156472A1 (en) | 2015-04-02 | 2016-03-31 | Torque transfer device for electric machine rotor and electric machine thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN204517563U (en) |
| WO (1) | WO2016156472A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020084040A1 (en) * | 2018-10-24 | 2020-04-30 | Hans Heidolph GmbH | Shaking and/or mixing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588761A (en) * | 2004-09-13 | 2005-03-02 | 胜华波集团有限公司 | Motor with turbine and worm decelerator |
| US20090285517A1 (en) * | 2008-05-15 | 2009-11-19 | Ulrich Eckel | Drive facility |
| US20130039696A1 (en) * | 2011-08-08 | 2013-02-14 | Denso Corporation | Coupling device for connecting rotary members |
| US20130296094A1 (en) * | 2009-10-27 | 2013-11-07 | Magna Powertrain Of America, Inc. | Electric drive unit with modular motor assembly |
| US20140119810A1 (en) * | 2012-10-31 | 2014-05-01 | Melvin Lee Tinnin | Steering wheel shaft retention mechanism assembly and service tool |
-
2015
- 2015-04-02 CN CN201520194913.1U patent/CN204517563U/en active Active
-
2016
- 2016-03-31 WO PCT/EP2016/057030 patent/WO2016156472A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588761A (en) * | 2004-09-13 | 2005-03-02 | 胜华波集团有限公司 | Motor with turbine and worm decelerator |
| US20090285517A1 (en) * | 2008-05-15 | 2009-11-19 | Ulrich Eckel | Drive facility |
| US20130296094A1 (en) * | 2009-10-27 | 2013-11-07 | Magna Powertrain Of America, Inc. | Electric drive unit with modular motor assembly |
| US20130039696A1 (en) * | 2011-08-08 | 2013-02-14 | Denso Corporation | Coupling device for connecting rotary members |
| US20140119810A1 (en) * | 2012-10-31 | 2014-05-01 | Melvin Lee Tinnin | Steering wheel shaft retention mechanism assembly and service tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020084040A1 (en) * | 2018-10-24 | 2020-04-30 | Hans Heidolph GmbH | Shaking and/or mixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN204517563U (en) | 2015-07-29 |
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