Vehicle transmission system and electric two-wheeled vehicle with same

Abstract

The utility model provides a vehicle transmission system and an electric two-wheeled vehicle with the same, the vehicle transmission system comprises a wheel, a wheel axle used for being fixed with a vehicle body, a bearing, a motor and a transmission structure, the motor is fixed on the wheel axle, the wheel is rotatably arranged on the wheel axle, and the transmission structure is arranged on the wheel axle. The transmission structure comprises a first gear and a second gear, the first gear is arranged on the motor, the second gear is arranged on the wheel, the first gear is in power connection with the second gear, the second gear and the axle are coaxially arranged, and the second gear is supported on the axle through a bearing. By means of the vehicle transmission system, good coaxiality can be achieved between all components in the vehicle transmission system and the axle.

Description

Technical Field

[0001] The utility model relates to the technical field of electric two-wheel vehicles, in particular to a power system of an electric two-wheel vehicle and an electric two-wheel vehicle having the same. Background Art

[0002] At present, the development of electric two-wheel vehicles is very rapid. Generally, an electric two-wheel vehicle is driven by a motor through a transmission mechanism to drive the wheels to rotate relative to the wheel axle, so that the vehicle body moves forward. That is, the wheels need to rotate around the axis of the wheel axle. Since the rotation speed of the wheels is relatively fast, therefore, it has relatively high requirements for the coaxial performance between the components of the vehicle transmission system such as the wheels, the motor, and the transmission mechanism and the wheel axle, so as to reduce the jitter of the wheels during traveling and the damage to the wheel axle. In the existing assembly method, it is impossible to achieve good coaxiality between the components of the vehicle transmission system and the wheel axle. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a vehicle transmission system and an electric two-wheel vehicle having the same, and the vehicle transmission system can enable better coaxiality between the components in the vehicle transmission system and the wheel axle.

[0004] The utility model provides a vehicle transmission system, which includes a wheel, a wheel axle for fixing with the vehicle body, a bearing, a motor and a transmission structure. The motor is fixed on the wheel axle, the wheel is rotatably arranged on the wheel axle, the transmission structure includes a first gear and a second gear, the first gear is arranged on the motor, the second gear is arranged on the wheel, the first gear is in power connection with the second gear, the second gear is coaxially arranged with the wheel axle, and the second gear is supported on the wheel axle through a bearing.

[0005] Further, an inner cavity is formed in the wheel, the motor, the first gear and the second gear are all located in the inner cavity of the wheel. A bolt fixing cylinder is formed on the wheel. One end of the bolt fixing cylinder forms a first connection hole communicating with the inner cavity of the wheel, and the other end is closed. The bolt fixing cylinder extends outward from the side where the inner cavity of the wheel is located. A second connection hole is formed on the second gear. A connecting bolt passes through the second connection hole and the first connection hole in sequence from the side where the inner cavity of the wheel is located and extends into the bolt fixing cylinder.

[0006] Further, the wheel includes a rim and a first cover and a second cover on both sides of the rim, and the first cover and the second cover are fixed to the rim by threads.

[0007] Further, the wheel includes a rim and a first cover and a second cover on both sides of the rim, and the first cover is integrally formed with the rim.

[0008] Furthermore, a first gear is formed on both sides of the motor, and a second gear is provided on each of the first cover and the second cover. Each first gear is power-connected to the second gear on its same side.

[0009] Furthermore, the motor includes a motor body and a housing. A through hole is formed in the housing, and the wheel shaft passes through the through hole so that the housing is fixed to the wheel shaft, and the motor body is fixed inside the housing.

[0010] Furthermore, there are multiple motors. Each motor is power-connected to the second gear through its own first gear. The housing integrally covers the multiple motors, and the through hole is formed between the multiple motors;

[0011] Or, each motor is covered with a housing.

[0012] Furthermore, the cross-section of the through hole is circular or non-circular, and the shape of the cross-section of the wheel shaft is the same as that of the through hole.

[0013] Furthermore, the motor includes a motor body and a housing. The motor body includes a stator. A connecting portion is integrally formed on the outer side surface of the stator. A through hole is formed in the connecting portion, and the wheel shaft passes through the through hole to connect the motor body to the wheel shaft, and the housing covers the motor body.

[0014] Furthermore, a through groove is formed on the side wall of the through hole, and the through groove penetrates the side wall of the through hole.

[0015] Furthermore, there are multiple motors. The multiple motors are combined into one body. The connecting portion is formed between the multiple motors, and the through hole is formed in the connecting portion.

[0016] Furthermore, the rotor of the motor is rotatably supported on the housing, and a plurality of fixing holes are provided on the motor body. The housing is connected to the motor body through the fixing holes.

[0017] The present utility model also provides an electric two-wheeler, including the above-mentioned vehicle transmission system.

[0018] In summary, in the present utility model, by fixing the motor on the wheel axle and transmitting power to the wheel through the first gear and the second gear, since the wheel axle supports both the motor and the wheel at the same time, and the second gear is coaxially arranged with the wheel axle and fixed on the wheel axle through a bearing, this can ensure good coaxiality among the second gear, the wheel and the wheel axle; further, since the motor is directly arranged on the wheel axle, therefore, the assembly tolerance between the motor and the wheel axle does not need to be considered, which can further improve the coaxiality of the vehicle transmission system.

[0019] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, details are described as follows. Brief Description of the Drawings

[0020] Figure 1 It is a schematic cross-sectional structure diagram of the vehicle transmission system provided by the first embodiment of the present utility model.

[0021] Figure 2 It is a schematic structure diagram when the motor of the present utility model is installed on the wheel axle.

[0022] Figure 3 For Figure 2 the schematic structure diagram of the motor body and the wheel axle in

[0023] Figure 4 It is a schematic cross-sectional structure diagram of the vehicle transmission system provided by the second embodiment of the present utility model.

[0024] Figure 5 It is a schematic structure diagram of the vehicle transmission system provided by the third embodiment of the present utility model.

[0025] Figure 6 For Figure 5 the schematic structure diagram of the vehicle transmission system without the end cover in

[0026] Figure 7 For Figure 5 the schematic structure diagram of the vehicle transmission system without the end cover and the wheel body in

[0027] Figure 8 For Figure 5 the schematic cross-sectional structure diagram of the vehicle transmission system in

[0028] Figure 9 It is a schematic structure diagram of the motor body and the wheel axle provided by the fourth embodiment of the present utility model.

[0029] Figure 10 For Figure 9Schematic diagram of the structure of the motor body.

[0030] Figure 11 is Figure 10 Schematic diagram of the structure of the stator body.

[0031] Figure 12 Schematic diagram of the structure of the motor body provided by the fifth embodiment of the present invention.

[0032] Figure 13 Schematic diagram of the structure of the motor body provided by the sixth embodiment of the present invention.

[0033] Figure 14 Schematic diagram of the structure of the motor body and the wheel axle provided by the seventh embodiment of the present invention.

[0034] Figure 15 is Figure 14 Schematic diagram of the structure of the motor body.

[0035] Figure 16 is Figure 14 Schematic diagram of the structure of the stator body.

[0036] Figure 17 Schematic diagram of the structure of the stator body provided by the eighth embodiment of the present invention. Detailed implementation manners

[0037] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended utility model purpose, the present invention is described in detail as follows in conjunction with the accompanying drawings and preferred embodiments.

[0038] The purpose of the present invention is to provide a vehicle transmission system and an electric two-wheeler having the same, and the vehicle transmission system can enable better coaxiality between the components in the vehicle transmission system and the wheel axle.

[0039] As Figures 1 to 3 shown, the vehicle transmission system provided by the first embodiment of the present invention includes a wheel 10, a wheel axle 20 for fixing to the vehicle body, a bearing 30, a motor 40 and a transmission structure. The motor 40 is fixed on the wheel axle 20, the wheel 10 is rotatably arranged on the wheel axle 20, the transmission structure includes a first gear 51 and a second gear 52. The first gear 51 is arranged on the motor 40, the second gear 52 is arranged on the wheel 10, the first gear 51 is power-connected to the second gear 52, and the second gear 52 is coaxially arranged with the wheel axle 20. The second gear 52 is supported on the wheel axle 20 through the bearing 30.

[0040] In this embodiment, by fixing the motor 40 on the wheel axle 20 and transmitting power to the wheel 10 through the first gear 51 and the second gear 52, since the wheel axle 20 supports both the motor 40 and the wheel 10 at the same time, and the second gear 52 is coaxially arranged with the wheel axle 20 and fixed on the wheel axle 20 through the bearing 30, this can ensure good coaxiality among the second gear 52, the wheel 10 and the wheel axle 20; further, since the motor 40 is directly arranged on the wheel axle 20, therefore, the assembly tolerance between the motor 40 and the wheel axle 20 does not need to be considered, which can further improve the coaxiality of the vehicle transmission system.

[0041] Further, in this embodiment, the wheel 10 includes a rim 12 and a first cover 13 and a second cover 14 located on both sides of the rim 12. The first cover 13 and the second cover 14 can be fixed on the rim 12 through bolts. The first cover 13, the second cover 14 and the rim 12 jointly enclose an inner cavity 15. In this embodiment, the wheel axle 20 supports the motor 40, the second gear 52 and the wheel 10 at the same time, which can further ensure good coaxiality among the second gear 52, the wheel 10 and the wheel axle 20.

[0042] Preferably, in this embodiment, the first gear 51 is directly meshed with the second gear 52. It can be understood that in other embodiments, there can also be other transmission gears between the first gear 51 and the second gear 52.

[0043] Further, in this embodiment, an inner cavity 15 is formed in the wheel 10, and the above-mentioned motor 40, the first gear 51 and the second gear 52 are all located in the inner cavity 15 of the wheel 10. In this embodiment, a first connection hole 11 is formed on the wheel 10, specifically on the inner side wall of the first cover 13. A second connection hole 521 is formed on the second gear 52. The connecting bolt 61 passes through the first connection hole 11 and the second connection hole 521 to fixedly connect the wheel 10 and the second gear 52, so as to complete the fixation between the second gear 52 and the wheel 10.

[0044] As Figure 1 shown, in this embodiment, the connecting bolt 61 passes through the first connection hole 11 and the second connection hole 521 in sequence from the outside of the wheel 10 to fix the second gear 52 on the wheel 10.

[0045] Further, an air valve hole 17 is also formed at the joint of the rim 12 and the second cover 14. When a tire is set on the wheel 10, the air valve of the tire is set in the air valve hole 17.

[0046] Further, please continue to refer to Figure 1 , air stirring vanes 18 are also arranged on the first cover 13 and / or the second cover 14, so as to assist the motor 40 in heat dissipation when the wheel 10 rotates.

[0047] Please continue to refer to Figure 2 and Figure 3 In this embodiment, the motor 40 includes a motor body 41 and a housing 42. The housing 42 covers the outside of the motor body 41. A through hole 421 is formed on the housing 42. The wheel shaft 20 passes through the through hole 421 so that the housing 42 is fixed on the wheel shaft 20, and the motor body 41 is fixed inside the housing 42.

[0048] In this embodiment, only the case of arranging one motor 40 on the vehicle drive system is shown. In other embodiments, multiple motors 40 may be arranged. The housing 42 as a whole covers the outside of the multiple motors 40. The multiple motors 40 are all connected to the wheel shaft 20 through the housing 42, and the through hole 421 is formed between the multiple motors 40.

[0049] In this embodiment, both the through hole 421 and the contact portion between the wheel shaft 20 and the through hole 421 are non-circular. The shape of the wheel shaft 20 is consistent with that of the through hole 421. Through the non-circular design, relative rotation between the wheel shaft 20 and the housing 42 can be prevented. It can be understood that in other embodiments, the through hole 421 may also be circular, and the wheel shaft 20 may be in interference fit with the through hole 421, or combined through other connection structures such as fixing parts and splines to fix the wheel shaft 20 in the through hole 421.

[0050] In this embodiment, multiple motors 40 can share a housing 42. It can be understood that in other embodiments, a housing 42 can be provided outside each motor 40.

[0051] As Figure 4 shown, the second embodiment of the present invention is the same as the first embodiment. The difference lies in that in this embodiment, a bolt fixing cylinder 16 is formed on the wheel 10. As Figure 4 shown, it can be formed on the first cover 13. A first connection hole 11 as described above is formed at one end of the bolt fixing cylinder 16, and the other end is closed. The opening of the first connection hole 11 faces the inner cavity 15 of the wheel 10. The bolt fixing cylinder 16 extends outward from the side where the inner cavity 15 of the wheel 10 is located. The connecting bolt 61( Figure 2 the connecting bolt 61 is omitted in for the convenience of showing the connection part) passes through the second connection hole 521 and the first connection hole 11 in sequence from the side where the inner cavity 15 of the wheel 10 is located and extends into the bolt fixing cylinder 16.

[0052] In this embodiment, the connecting bolt 61 sequentially passes through the second connection hole 521 and the first connection hole 11 from the side where the inner cavity 15 of the wheel 10 is located, and extends into the closed bolt fixing cylinder 16. Through the arrangement of the bolt fixing cylinder 16, it is possible to prevent the connecting bolt 61 from shaking or shifting during the movement of the vehicle transmission system, further ensuring the coaxiality between the second gear 52 and the wheel axle 20. Further, through the arrangement of the closed bolt fixing cylinder 16, the connecting bolt 61 can be protected from corrosion, so as to prevent misalignment between the second gear 52 and the wheel 10.

[0053] Further, the first cover 13 can be integrally formed with the rim 12. By integrally forming the first cover 13 and the rim 12, assembly errors can be reduced, coaxiality can be increased. In addition, it can also improve the rigidity of the wheel 10 and reduce noise.

[0054] It can be understood that in this embodiment, the bolt fixing cylinder 16 is shown to be provided on the first cover 13, and the first cover 13 is a structure integrally formed with the rim 12. However, this does not mean that in the embodiments with the bolt fixing cylinder 16, the first cover 13 must be integrally formed with the rim 12. The bolt fixing cylinder 16 can be applied to various embodiments of the present application.

[0055] As Figures 5 to 8 shown, the vehicle transmission system provided by the third embodiment of the present utility model can adopt the relevant structures of the first embodiment and the second embodiment. The difference is that in this embodiment, a first gear 51 is formed on both sides of the motor 40, and a second gear 52 is provided on both the first cover 13 and the second cover 14. Each first gear 51 is power-connected to the second gear 52 on its same side. By arranging the first gears 51 on both sides of the motor 40, the motor 40 and the wheel 10 can be better transmitted. Similar to the above embodiments, both second gears 52 can be connected to the wheel axle 20 through bearings 30.

[0056] It should be noted that the transmission method in this embodiment can also be combined with other structures in the first embodiment and the second embodiment.

[0057] Further, in this embodiment, the first cover 13 can also be integrally formed with the rim 12. The difference is that in this embodiment, a first thread (not shown in the figure) is formed on the inner circumference or outer circumference of the side of the rim 12 facing the second cover 14, and a second thread (not shown in the figure) corresponding to the first thread is formed on the side of the second cover 14 facing the rim 12. The first cover 13 is screwed onto the rim 12 through the second thread and the first thread to facilitate connection with the rim 12. The above structure can also be applied to various embodiments of the present utility model.

[0058] As Figure 9 and Figure 11 shown, the fourth embodiment of the present utility model is basically the same as the above embodiments, except that the fixing manner of the motor 40 and the wheel axle 20 is different.

[0059] In this embodiment, the motor body 41 includes a stator 411. A connecting portion 412 is integrally formed on the outer side surface of the stator 411. The above-mentioned through hole 421 is formed on the connecting portion 412. The wheel axle 20 is inserted into the through hole 421 to connect the motor body 41 and the wheel axle 20. The housing 42 is covered outside the motor body 41. Preferably, the housing 42 can further cover the connecting portion 412.

[0060] In this embodiment, the connecting portion 412 is directly integrally formed on the outer side surface of the stator 411, rather than on the housing 42. That is, the wheel axle 20 is directly connected to the stator 411 of the motor 40, rather than being connected to the motor body 41 through the housing 42. Compared with the prior art, this can eliminate the installation error between the wheel axle 20, the housing 42 and the motor body 41, which will further reduce the assembly error between the first gear 51 and the second gear 52, and further ensure the coaxiality between the vehicle transmission system and the wheel axle 20.

[0061] In this embodiment, the case where the stator 411 is only one piece is shown. It can be understood that in other embodiments, the motor body 41 may include multiple stator 411s stacked together. Each stator 411 is provided with a connecting piece, and each connecting piece is provided with a through hole. The above-mentioned connecting portion 412 is formed by stacking multiple connecting pieces, and the through hole 421 is also composed of multiple through holes that are coaxial and have equal diameters.

[0062] In the above case, after stacking multiple stator 411s, the entire through hole 421 can be reshaped to ensure the coaxiality of the through hole 421.

[0063] Further, in this embodiment, the rotor of the motor 40 (not shown in the figure) is rotatably supported on the housing 42 through bearings. A plurality of fixing holes 414 are formed around the motor body 41. The housing 42 is fixed to the motor body 41 through the fixing holes 414, which can ensure the coaxiality between the rotor and the inner circle of the stator 311.

[0064] It can be understood that in this embodiment, except for the different combination manner of the motor 40 and the wheel axle 20, the relevant structures of the other components can be the same as those mentioned in the first to third embodiments above.

[0065] Please refer to Figure 12, the vehicle transmission system provided by the fifth embodiment of the present utility model is basically the same as the fourth embodiment. The difference is that in this embodiment, a through groove 422 is formed on the side wall of the through hole 421. The through groove 422 penetrates the side wall of the through hole 421 and extends from one end of the through hole 421 to the other end along the axis of the through hole 421. That is, there is a notch on the side of the through hole 421, and the setting of this notch can leave space for the layout of the circuit of the motor 40.

[0066] Please continue to refer to Figure 13 , the vehicle transmission system provided by the sixth embodiment of the present utility model is basically the same as the fifth embodiment. The difference is that in this embodiment, the through groove 422 no longer directly extends from one end of the through hole 421 to the other end. In this embodiment, there are at least two through grooves 422, and the two through grooves 422 respectively extend from both ends of the through hole 421 to the middle of the through hole 421. The above structure can increase the strength at the through hole 421 and further ensure its coaxiality.

[0067] As Figures 14 to 15 shown, the vehicle transmission system provided by the seventh embodiment of the present utility model is basically the same as any one of the fourth to sixth embodiments. The difference is that in this embodiment, there can be two motors 40, and each motor 40 is power-connected to the second gear 52 through its own first gear 51. The stators 411 of the two motors 40 are integrated into one body, a connecting portion 412 is formed between the two stators 411, a through hole 421 is formed in the connecting portion 412, and the stators 411 of the two motors 40 are symmetric about the axis of the through hole 421.

[0068] Through the above structure, when multiple motors 40 jointly provide power, the coaxiality of each motor 40 and the wheel axle 20 can be ensured. As Figure 16 shown, the vehicle transmission system provided by the eighth embodiment of the present utility model is basically the same as the seventh embodiment. The difference is that in this embodiment, there can be three or more motors 40. The stators 411 of the three motors 40 are integrally formed, and the connecting portion 412 is located between the stators 411 of the three motors 40. In the same cross-section perpendicular to the axis of the through hole 421, the centers of the stators 411 on the three motors 40 are arranged in an equilateral triangle, and the axis of the through hole 421 is located at the center of the above equilateral triangle.

[0069] Furthermore, in the present utility model, there can be more motors 40. The stators 411 of the multiple motors 40 are all formed into one body. In the same cross-section perpendicular to the axis of the through hole 421, the centers of the stators 411 on the multiple motors 40 are distributed in a regular polygon, and the axis of the through hole 421 is located at the center of the above regular polygon.

[0070] Understandably, in other embodiments, the multiple motors 40 may also be arranged non-uniformly.

[0071] The present utility model also provides an electric two-wheeler, including the above-mentioned vehicle transmission system. As described above, the above are only the preferred embodiments of the present utility model, and do not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A vehicle transmission system, characterized in that: It includes a wheel, an axle for fixing to a vehicle body, a bearing, a motor and a transmission structure. The motor is fixed on the axle, the wheel is rotatably arranged on the axle, the transmission structure includes a first gear and a second gear, the first gear is arranged on the motor, the second gear is arranged on the wheel, the first gear is power-connected to the second gear, the second gear is coaxially arranged with the axle, and the second gear is supported on the axle by a bearing.

2. The vehicle transmission system according to claim 1, characterized in that: An inner cavity is formed in the wheel, and the motor, the first gear and the second gear are all located in the inner cavity of the wheel. A bolt fixing cylinder is formed on the wheel. One end of the bolt fixing cylinder forms a first connection hole communicating with the inner cavity of the wheel, and the other end is closed. The bolt fixing cylinder extends outward from the side where the inner cavity of the wheel is located. A second connection hole is formed on the second gear. A connecting bolt passes through the second connection hole and the first connection hole in sequence from the side where the inner cavity of the wheel is located and extends into the bolt fixing cylinder.

3. The vehicle transmission system according to claim 1 or 2, characterized in that: The wheel includes a rim and a first cover and a second cover on both sides of the rim. The first cover and the second cover are fixed to the rim by threads.

4. The vehicle transmission system according to claim 1 or 2, characterized in that: The wheel includes a rim and a first cover and a second cover on both sides of the rim. The first cover is integrally formed with the rim.

5. The vehicle transmission system according to claim 4, wherein: A first gear is formed on both sides of the motor. A second gear is arranged on each of the first cover and the second cover. Each first gear is power-connected to the second gear on its same side.

6. The vehicle transmission system according to claim 1, wherein: The motor includes a motor body and a housing. A through hole is formed in the housing. The axle passes through the through hole so that the housing is fixed on the axle, and the motor body is fixed in the housing.

7. The vehicle transmission system according to claim 6, wherein: There are multiple motors. Each motor is power-connected to the second gear through its own first gear. The housing integrally covers outside the multiple motors, and the through hole is formed between the multiple motors; or, each motor is covered with a housing.

8. The vehicle transmission system according to claim 6, wherein: The cross section of the through hole is circular or non-circular, and the shape of the cross section of the axle is the same as that of the through hole.

9. The vehicle transmission system according to claim 1, characterized in that: The motor includes a motor body and a housing. The motor body includes a stator. A connecting part is integrally formed on the outer side surface of the stator. A through hole is formed in the connecting part. The axle passes through the through hole to connect the motor body to the axle, and the housing covers outside the motor body.

10. The vehicle transmission system according to claim 9, wherein: A through groove is formed on the side wall of the through hole, and the through groove penetrates the side wall of the through hole.

11. The vehicle transmission system according to claim 9, characterized in that: There are multiple motors. The multiple motors are combined into one body. The connecting part is formed between the multiple motors, and the through hole is formed in the connecting part.

12. The vehicle transmission system according to claim 6, wherein: The rotor of the motor is rotatably supported on the housing. A plurality of fixing holes are arranged on the motor body, and the housing is connected to the motor body through the fixing holes.

13. An electric two-wheeler, characterized in that: It includes the vehicle transmission system according to any one of claims 1 to 12.

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