High-speed motor of electric motorcycle

Abstract

The utility model relates to an electric friction high-speed motor, which comprises a hub, a shell assembly, a motor shaft, a stator and rotor assembly and a transmission assembly, a spacer bush assembly is arranged between the stator and rotor assembly and the transmission assembly, and the transmission assembly comprises a sun wheel, a planet carrier, a gear ring, a plurality of planet wheel shafts and a plurality of planet wheels. The sun wheel is arranged on the motor shaft in a sleeving mode through a second bearing, one end of the planet carrier is arranged on the spacer bush assembly in a sleeving mode through a third bearing, the other end of the planet carrier is connected with the motor shaft through a key, the planet wheel shafts are evenly arranged in the planet carrier in the circumferential direction, and the planet wheels are arranged on the planet wheel shafts in a sleeving mode through fourth bearings respectively. The planet wheel is meshed with the sun wheel, the gear ring is arranged outside the planet wheel in a sleeving mode and meshed with the planet wheel, the shell assembly is coaxially arranged outside the stator and rotor assembly and the transmission assembly in a sleeving mode, the hub is arranged outside the shell assembly in a sleeving mode, and the electric friction high-speed motor is high in reliability, low in failure rate and compact in structure.

Description

Technical Field

[0001] This utility model relates to the field of hub motor technology, and in particular to a high-speed motor for electric motorcycles. Background Technology

[0002] Electric motorcycles have gained increasing popularity due to their advantages such as high speed, environmental friendliness, and economy. As a type of electric vehicle, its electric drive and control system mainly consists of a motor and a speed control device.

[0003] Currently, the wheel hub motors used in electric motorcycles on the market have a high failure rate in their reduction gear mechanisms, which directly affects the reliability and lifespan of the entire wheel hub motor. This not only greatly impacts the user experience but also results in poor safety. Utility Model Content

[0004] To address the above problems, this utility model proposes a high-speed electric motor for electric motorcycles that features high reliability, low failure rate, and compact structure.

[0005] This utility model is achieved through the following technical solution: a high-speed electric motor for electric motorcycles, including a hub, a housing assembly, a motor shaft, a stator and rotor assembly, and a transmission assembly. The housing assembly is coaxially sleeved outside the stator and rotor assembly and the transmission assembly. The hub is sleeved outside the housing assembly. The stator and rotor assembly is sleeved on the motor shaft through two first bearings.

[0006] To improve lubrication, liquid gear oil is used for lubrication in the transmission assembly. To isolate the motor and transmission parts and prevent gear oil from flowing into the motor and causing motor malfunction, a spacer assembly is provided between the stator and rotor assembly and the transmission assembly.

[0007] Furthermore, the spacer assembly includes a spacer and an oil guide cap. The spacer is sleeved outside the motor shaft and a first oil seal is provided between the spacer and the motor shaft. The oil guide cap is sleeved outside the spacer and a second oil seal is provided between the oil guide cap and the spacer.

[0008] To achieve the best oil separation effect, the outer edge of the oil guide cap extends axially to one side with a housing mating part, and the outer diameter surface of the housing mating part fits against the inner diameter surface of the housing assembly.

[0009] To improve the oil guiding effect, the oil guide cover has a slope that is inclined towards the stator and rotor assembly. To improve the strength of the oil guide cover, several reinforcing protrusions are uniformly stamped on the oil guide cover.

[0010] To improve the reliability and extend the service life of the reduction mechanism, the transmission assembly includes a sun gear, a planetary gear carrier, a ring gear, several planetary gear shafts, and several planetary gears. The sun gear is mounted on the motor shaft via a second bearing. One end of the planetary gear carrier is mounted on the spacer assembly via a third bearing, and the other end is connected to the motor shaft via a key. The planetary gear shafts are evenly arranged circumferentially within the planetary gear carrier. Several planetary gears are respectively mounted on the planetary gear shafts via fourth bearings. The planetary gears mesh with the sun gear. The ring gear is mounted outside the planetary gears and meshes with them.

[0011] To improve the reliability of structural assembly and the stability of gear operation, a gear groove is further provided on the housing assembly corresponding to the position of the gear ring, and the outer ring of the gear ring is disposed in the gear groove.

[0012] To improve the lubrication effect of the bearings inside the planetary gear and thus extend their service life, the planetary gear shaft is a hollow shaft, and a lubricating oil hole is radially opened in the middle of the planetary gear shaft.

[0013] Preferably, there are 3 planetary gears and 3 planetary gear shafts. However, more planetary gears and a corresponding number of planetary gear shafts can be designed depending on the actual situation.

[0014] Since the maximum torque of the motor can exceed 200 N·m, in order to improve the strength of the gears in the transmission assembly, it is preferable that the planetary gears, sun gears and ring gears are made of steel.

[0015] To further improve gear strength, increase its impact resistance and transmission smoothness, and reduce its noise, preferably, the planetary gears, sun gears, and ring gears are all helical gears.

[0016] Furthermore, the housing assembly is mounted on the planetary gear carrier and the motor shaft at both ends via a fifth bearing and a sixth bearing, respectively, and a third oil seal and a fourth oil seal are respectively provided between the two ends of the housing assembly and the motor shaft.

[0017] To improve structural compactness and reliability, it is preferable that the first, third, fifth, and sixth bearings are all deep groove ball bearings, and the second and fourth bearings are all needle roller bearings. However, other types of first, second, third, and fourth bearings may also be selected depending on the actual situation.

[0018] The beneficial effects of this utility model are as follows: The high-speed electric motor for electric motorcycles, by designing separate stator and rotor assemblies and a gearbox assembly, improves the structural compactness of the hub motor for electric motorcycles; by designing steel helical gears for the sun gear, planet gears, and ring gear, and optimizing the lubrication structure within the gearbox assembly, the impact resistance and reliability of the gears are greatly improved, thereby extending the service life of the gearbox assembly; by designing an oil guide cap between the rotor assembly and the gearbox assembly, lubricating oil is prevented from entering the motor, ensuring the reliability of the motor while further improving the lubrication effect of the gears within the gearbox assembly, thus reducing the failure rate of the hub motor for electric motorcycles and improving the safety and reliability of the electric motorcycle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the high-speed motor for electric motorcycles according to this utility model.

[0020] Figure 2 This is a cross-sectional view of the high-speed electric motor of the present invention.

[0021] Figure 3 This is a structural schematic diagram of the transmission assembly (showing only one set of planetary gears and planetary gear shafts) of the high-speed motor of the electric motorcycle of this utility model;

[0022] Figure 4 This is a schematic diagram of the planetary gear shaft of the high-speed electric motor of this utility model;

[0023] Figure 5 This is a schematic diagram of the oil guide cover of the high-speed motor of the electric motorcycle according to this utility model;

[0024] In the diagram: 1. Hub; 2. Housing assembly; 21. Gear ring groove; 3. Motor shaft; 4. Stator and rotor assembly; 5. Gearbox assembly; 51. Sun gear; 52. Planetary gear carrier; 53. Gear ring; 54. Planetary gear shaft; 541. Lubricating oil hole; 6. Spacer assembly; 61. Spacer; 62. Oil guide cap; 621. Housing mating part; 622. Reinforcing bulge; 7. Key; 81. First oil seal; 82. Second oil seal; 83. Third oil seal; 84. Fourth oil seal; 91. First bearing; 92. Second bearing; 93. Third bearing; 94. Fourth bearing; 95. Fifth bearing; 96. Sixth bearing. Detailed Implementation

[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0026] like Figure 1-3The high-speed motor of the electric motorcycle shown includes a hub 1, a housing assembly 2, a motor shaft 3, a stator and rotor assembly 4, and a transmission assembly 5. The housing assembly 2 is coaxially sleeved on the stator and rotor assembly 4 and the transmission assembly 5. The hub 1 is sleeved on the housing assembly 2. The stator and rotor assembly 4 is sleeved on the motor shaft 3 through two first bearings 91.

[0027] A spacer assembly 6 is provided between the stator / rotor assembly 4 and the gearbox assembly 5. The spacer assembly 6 includes a spacer 61 and an oil guide cap 62. The spacer 61 is fitted over the motor shaft 3, and a first oil seal 81 is provided between the spacer 61 and the motor shaft 3. The oil guide cap 62 is fitted over the spacer 61, and a second oil seal 82 is provided between the oil guide cap 62 and the spacer 61. The oil guide cap 62 has a slope inclined towards the stator / rotor assembly 4. Figure 5 As shown, the oil guide cover 62 is uniformly stamped with several reinforcing protrusions 622, and the outer edge of the oil guide cover 62 extends axially to one side with a housing mating part 621, the outer diameter surface of the housing mating part 621 is in contact with the inner diameter surface of the housing assembly 2.

[0028] The transmission assembly 5 includes a sun gear 51, a planetary gear carrier 52, a ring gear 53, three planetary gear shafts 54, and three planetary gears 55. The planetary gears 55, the sun gear 51, and the ring gear 53 are made of steel, and all of them are helical gears.

[0029] The sun gear 51 is mounted on the motor shaft 3 via a second bearing 92. One end of the planetary gear carrier 52 is mounted on the spacer assembly 6 via a third bearing 93, and the other end is connected to the motor shaft 3 via a key 7. The planetary gear shafts 54 are evenly arranged circumferentially within the planetary gear carrier 52. Figure 4 As shown, the planetary gear shaft 54 ​​is a hollow shaft, and a lubricating oil hole 541 is radially opened in the middle of the planetary gear shaft 54. The three planetary gears 55 are respectively sleeved on the planetary gear shaft 54 ​​through the fourth bearing 94. The planetary gears 55 mesh with the sun gear 51. A gear groove 21 is opened on the housing assembly 2 corresponding to the position of the gear ring 53. The outer ring of the gear ring 53 is disposed in the gear ring groove 21. The gear ring 53 is sleeved on the outside of the three planetary gears 55 and meshes with the planetary gears 55.

[0030] The housing assembly 2 is mounted on the planetary gear carrier 52 and the motor shaft 3 at both ends via the fifth bearing 95 and the sixth bearing 96, respectively. A third oil seal 83 and a fourth oil seal 84 are respectively provided between the two ends of the housing assembly 2 and the motor shaft 3.

[0031] The first bearing 91, the third bearing 93, the fifth bearing 95, and the sixth bearing 96 are all deep groove ball bearings, while the second bearing 92 and the fourth bearing 94 are both needle roller bearings.

[0032] As an important component of the electric motorcycle's power transmission system, the high-speed motor of this electric motorcycle, when running, the stator and rotor assembly 4, as the motor part, provides driving force for the vehicle's movement, while the gearbox assembly 5 reduces speed and increases torque to ensure stable driving. The sun gear 51, planetary gear carrier 52, ring gear 53, planetary gears 55, second bearing 92, and fourth bearing 94 in the gearbox assembly 5 are lubricated with gear oil, which is stable, reliable, and has low noise, providing a comfortable driving experience.

[0033] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] Furthermore, in the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A high speed motor for an electric motorcycle, characterized by: The application relates to a wheel hub motor, which comprises a wheel hub, a housing assembly, a motor shaft, a stator-rotor assembly and a transmission assembly, wherein a spacer sleeve assembly is arranged between the stator-rotor assembly and the transmission assembly, the stator-rotor assembly is arranged on the motor shaft through two first bearing sleeves, the transmission assembly comprises a sun gear, a planet carrier, a ring gear, a plurality of planet shafts and a plurality of planet gears, the sun gear is arranged on the motor shaft through a second bearing sleeve, one end of the planet carrier is arranged on the spacer sleeve assembly through a third bearing sleeve, and the other end of the planet carrier is connected with the motor shaft through a key, the planet shafts are uniformly arranged in the planet carrier in the circumferential direction, the planet gears are arranged on the planet shafts through fourth bearing sleeves respectively, the planet gears are engaged with the sun gear, the ring gear is arranged outside the planet gears and engaged with the planet gears, the housing assembly is coaxially arranged outside the stator-rotor assembly and the transmission assembly, and the wheel hub is arranged outside the housing assembly.

2. The high speed motor of the electric motorcycle according to claim 1, characterized in that: The spacer sleeve assembly comprises a spacer sleeve and an oil guide cover, the spacer sleeve is arranged outside the motor shaft, and a first oil seal is arranged between the spacer sleeve and the motor shaft, and the oil guide cover is arranged outside the spacer sleeve, and a second oil seal is arranged between the oil guide cover and the spacer sleeve.

3. The high speed motor of the electric motorcycle according to claim 2, characterized in that: An outer edge of the oil guide cover extends to one side in the axial direction and is provided with a housing matching part, an outer diameter surface of the housing matching part is matched with an inner diameter surface of the housing assembly, the oil guide cover has an inclination towards the stator-rotor assembly, and a plurality of reinforcing convexes are uniformly punched on the oil guide cover.

4. The high speed motor of the electric motorcycle according to claim 1, characterized in that: A ring gear groove is formed on the housing assembly corresponding to the position of the ring gear, and an outer ring of the ring gear is arranged in the ring gear groove.

5. The high speed motor of the electric motorcycle according to claim 1, characterized in that: The planet shafts are hollow shafts, and lubricating oil holes are formed in the planet shafts in the radial direction.

6. The high speed motor of the electric motorcycle according to claim 1, characterized by: The number of the planet gears is three, and the number of the planet shafts is three.

7. The high speed motor of the electric motorcycle according to claim 1, characterized by: The materials of the planet gears, the sun gear and the ring gear are steel.

8. The high speed motor of the electric motorcycle according to claim 1, characterized by: The planet gears, the sun gear and the ring gear are helical gears.

9. The high speed motor of the electric motorcycle according to claim 1, characterized by: The housing assembly is arranged on the planet carrier and the motor shaft through fifth and sixth bearing sleeves respectively at two ends, and third and fourth oil seals are arranged between the two ends of the housing assembly and the motor shaft respectively.

10. The high speed motor of the electric motorcycle according to claim 9, characterized in that: The first bearing, the third bearing, the fifth bearing and the sixth bearing are deep groove ball bearings, and the second bearing and the fourth bearing are needle bearings.

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