Powered rear swingarm drive system of pure electric two-wheeled motorcycle

Abstract

Disclosed in the present utility model is a powered rear swingarm drive system of a pure electric two-wheeled motorcycle. The powered rear swingarm drive system comprises a rear fork fixing seat, wherein one side of the rear fork fixing seat is connected to a frame, a powered swingarm housing and a support swingarm are provided at two ends of the other side of the rear fork fixing seat, respectively, an output shaft is rotationally connected between the powered swingarm housing and the support swingarm, an electric motor cavity is provided in the powered swingarm housing, and a gear cavity is provided in the side of the electric motor cavity that is close to the output shaft; a driving electric motor is provided in the electric motor cavity, a driving gear shaft and a driven gear which are meshed with each other are provided in the gear cavity, and the driving gear shaft and the driven gear form a speed reduction transmission; and the driving gear shaft is connected to an electric motor shaft of the driving motor, one end of the output shaft extends into the gear cavity, and the driven gear is connected to the output shaft. A power transmission path is shorter, the efficiency is better, and the sealing performance is good. The size of a battery is not required to be reduced, and a larger battery can be placed to increase the range. The problems of poor performance and poor waterproofness caused by an increased moment of inertia resulting from a hub electric motor are reduced.

Description

Pure electric two-wheeled motorcycle power rear fork drive system Technical Field

[0001] The utility model belongs to the technical field of motorcycle electric drive, and more specifically relates to a power rear flat fork drive system for a pure electric two-wheeled motorcycle. Background Art

[0002] In the field of motorcycle electric drive, the commonly used structural forms currently include hub motors and mid-mounted motors. When using hub motor drive, although the structure is simple, the hub motor is heavy, has a large moment of inertia, and is inefficient, which not only affects the handling performance of the entire vehicle, but also increases material costs, and the hub motor has poor waterproof sealing performance; while the transmission path when driven by a mid-mounted motor is longer, and it will occupy the limited space of the motorcycle itself, sacrificing the battery volume, thereby reducing the vehicle's range.

[0003] At present, some methods have begun to use side-mounted motors for driving, but their transmission system structures are complex, affecting transmission efficiency and manufacturing costs.

[0004] Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model provides a pure electric two-wheeled motorcycle power rear flat fork drive system, which has better power transmission efficiency, small occupied volume, stable performance and good waterproofness.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a power rear fork drive system for a pure electric two-wheeled motorcycle, comprising a rear fork fixing seat, one side of the rear fork fixing seat is connected to the frame, and a power fork housing and a supporting fork are respectively provided at both ends of the other side, an output shaft is rotatably connected between the power fork housing and the supporting fork, a motor cavity is provided on the power fork housing, a gear cavity is provided on the side of the motor cavity close to the output shaft, a drive motor is provided in the motor cavity, a driving gear shaft and a driven gear that mesh with each other are provided in the gear cavity, and the driving gear shaft and the driven gear form a reduction transmission, the driving gear shaft is connected to the motor shaft on the drive motor, one end of the output shaft extends into the gear cavity, and the driven gear is connected to the output shaft.

[0007] Furthermore, a sealing hole is provided between the motor cavity and the gear cavity, the end of the motor shaft extends into the sealing hole, and an oil seal is provided between the end of the motor shaft and the sealing hole.

[0008] Furthermore, a protruding first bearing hole is provided on the inner wall of the motor cavity close to the gear cavity, the first bearing hole corresponds to the sealing hole, and a motor support bearing is provided between the motor shaft and the first bearing hole.

[0009] Furthermore, the end of the output shaft extending into the gear cavity is close to the inner wall of the gear cavity, a protruding second bearing hole is provided on the inner wall of the gear cavity, the end of the output shaft extends into the second bearing hole, and an output support bearing is provided between the end of the output shaft and the second bearing hole.

[0010] Furthermore, the passive gear is connected to the end of the output shaft extending into the gear cavity, and a retaining ring is provided on the end of the output shaft, and the retaining ring is in contact with the passive gear.

[0011] Furthermore, the power flat fork housing and the rear fork fixing seat are fixedly connected by bolts and nuts.

[0012] Furthermore, a plurality of reinforcing ribs are provided on the power fork housing and the supporting fork.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the driving motor in the motor cavity is started, driving the driving gear shaft to rotate, then driving the driven gear to rotate, and finally driving the output shaft to rotate, thereby realizing the driving of the driving wheel. Since the driving motor and the transmission system are both built into the power rear fork housing on one side of the driving wheel, the power transmission path is shorter, the efficiency is better, and the sealing performance is good; there is no need to sacrifice the battery volume, so that a larger battery can be placed to increase the cruising range; and the performance degradation and waterproof problems caused by the increase in rotational inertia caused by the hub motor are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic diagram of the appearance and structure of a power rear fork drive system for a pure electric two-wheeled motorcycle according to the present invention;

[0015] FIG2 is a schematic diagram of the internal structure of the power rear fork drive system of the pure electric two-wheeled motorcycle in the first embodiment of the present utility model;

[0016] FIG3 is a schematic diagram of the internal structure of the power rear fork drive system of the pure electric two-wheeled motorcycle in the second embodiment of the present utility model.

[0017] Figure numerals: rear fork fixing seat 1; power flat fork housing 2; support flat fork 3; output shaft 4; motor cavity 5; gear cavity 6; drive motor 7; active gear shaft 8; passive gear 9; sealing hole 10; oil seal 11; first bearing hole 12; motor support bearing 13; second bearing hole 14; output support bearing 15; retaining ring 16; motor shaft 17. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. In the description of this utility model, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0020] The present invention will be further described with reference to FIG1 to FIG3 .

[0021] Example 1:

[0022] The power rear fork drive system of a pure electric two-wheeled motorcycle includes a rear fork fixing seat 1, one side of the rear fork fixing seat 1 is connected to the frame, and a power fork housing 2 and a support fork 3 are respectively provided at both ends of the other side, an output shaft 4 is rotatably connected between the power fork housing 2 and the support fork 3, a motor cavity 5 is provided on the power fork housing 2, a gear cavity 6 is provided on the side of the motor cavity 5 close to the output shaft 4, a drive motor 7 is provided in the motor cavity 5, a driving gear shaft 8 and a driven gear 9 that mesh with each other are provided in the gear cavity 6, and the driving gear shaft 8 and the driven gear 9 are reduced speed transmission, the driving gear shaft 8 is connected to the motor shaft on the drive motor 7, one end of the output shaft 4 extends into the gear cavity 6, and the driven gear 9 is connected to the output shaft 4.

[0023] Specifically, a driving wheel is provided on the output shaft 4 .

[0024] As shown in Figures 1 and 2, the drive motor 7 in the motor cavity 5 is started, driving the driving gear shaft 8 to rotate, then driving the driven gear 9 to rotate, and finally driving the output shaft 4 to rotate, thereby realizing the driving of the driving wheel. Since the drive motor 7 and the transmission system are both built into the power rear fork housing on the driving wheel side, the power transmission path is shorter, the efficiency is better, and the sealing performance is good; there is no need to sacrifice the battery volume, so a larger battery can be placed to increase the cruising range; and the performance degradation and waterproof problems caused by the increase in rotational inertia caused by the hub motor are reduced.

[0025] As shown in Figure 2, in this embodiment, preferably, a sealing hole 10 is provided between the motor cavity 5 and the gear cavity 6, the end of the motor shaft extends into the sealing hole 10, and an oil seal 11 is provided between the end of the motor shaft and the sealing hole 10, so that the oil seal 11 prevents the lubricating oil in the gear cavity 6 from flowing into the motor cavity 5.

[0026] As shown in Figure 2, in this embodiment, preferably, a protruding first bearing hole 12 is provided on the inner wall of the motor cavity 5 near the gear cavity 6, and the first bearing hole 12 corresponds to the sealing hole 10. A motor support bearing 13 is provided between the motor shaft and the first bearing hole 12, so that both ends of the motor shaft and both ends of the driving gear are supported by bearings, making their rotation more stable.

[0027] Specifically, a bearing oil retaining ring corresponding to the motor support bearing 13 is provided in the first bearing hole 12 , and the bearing oil retaining ring is located on a side of the motor support bearing 13 facing the oil seal 11 .

[0028] As shown in Figure 2, in this embodiment, preferably, the end of the output shaft extending into the gear cavity 6 is close to the inner wall of the gear cavity 6, and a protruding second bearing hole 14 is provided on the inner wall of the gear cavity 6. The end of the output shaft 4 extends into the second bearing hole 14, and an output support bearing 15 is provided between the end of the output shaft 4 and the second bearing hole 14, so that the output shafts 4 on both sides of the driven gear 9 are supported by bearings, making the rotation of the driven gear 9 more stable.

[0029] As shown in FIG. 1 and FIG. 2 , in this embodiment, preferably, the power flat fork housing 2 and the rear fork fixing seat 1 are fixedly connected by bolts and nuts to facilitate the disassembly and assembly of the driving wheel.

[0030] As shown in FIG. 1 and FIG. 2 , in this embodiment, preferably, the power fork housing 2 and the support fork 3 are both provided with a plurality of reinforcing ribs.

[0031] Example 2:

[0032] A power rear fork drive system for a pure electric two-wheeled motorcycle includes a rear fork fixing seat 1, one side of the rear fork fixing seat 1 is connected to the frame, and a power fork housing 2 and a support fork 3 are respectively provided at both ends of the other side, an output shaft 4 is rotatably connected between the power fork housing 2 and the support fork 3, a motor cavity 5 is provided on the power fork housing 2, a gear cavity 6 is provided on the side of the motor cavity 5 close to the output shaft 4, a drive motor 7 is provided in the motor cavity 5, a driving gear shaft 8 and a driven gear 9 that mesh with each other are provided in the gear cavity 6, and the driving gear shaft 8 and the driven gear 9 are reduced speed transmission, the driving gear shaft 8 is connected to the motor shaft on the drive motor 7, one end of the output shaft 4 extends into the gear cavity 6, and the driven gear 9 is connected to the output shaft 4.

[0033] As shown in Figures 1 and 3, the drive motor 7 in the motor cavity 5 is started, driving the driving gear shaft 8 to rotate, then driving the driven gear 9 to rotate, and finally driving the output shaft 4 to rotate, thereby realizing the driving of the driving wheel. Since the drive motor 7 and the transmission system are both built into the power rear fork housing on the driving wheel side, the power transmission path is shorter, the efficiency is better, and the sealing performance is good; there is no need to sacrifice the battery volume, so a larger battery can be placed to increase the cruising range; and the performance degradation and waterproof problems caused by the increase in rotational inertia caused by the hub motor are reduced.

[0034] As shown in FIG3 , in this embodiment, preferably, a sealing hole 10 is provided between the motor cavity 5 and the gear cavity 6, the end of the motor shaft extends into the sealing hole 10, and an oil seal 11 is provided between the end of the motor shaft and the sealing hole 10, so as to prevent the lubricating oil in the gear cavity 6 from flowing into the motor cavity 5.

[0035] As shown in FIG3 , in this embodiment, preferably, the passive gear 9 is connected to the end of the output shaft 4 extending into the gear cavity 6 , and a retaining ring is provided on the end of the output shaft 4 , and the retaining ring contacts the passive gear 9 to prevent the passive gear 9 from falling off.

[0036] As shown in FIG3 , in this embodiment, the first bearing hole 12 and the second bearing hole 14 in the original embodiment 1 are removed, and the corresponding bearings in the bearing holes are also removed. The entire drive system uses only four bearing supports, which has a simple structure and lower manufacturing costs.

[0037] As shown in FIG. 1 and FIG. 3 , in this embodiment, preferably, the power flat fork housing 2 and the rear fork fixing seat 1 are fixedly connected by bolts and nuts to facilitate the disassembly and assembly of the driving wheel.

[0038] As shown in FIG. 1 and FIG. 3 , in this embodiment, preferably, the power fork housing 2 and the support fork 3 are both provided with a plurality of reinforcing ribs.

[0039] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A power rear swingarm drive system for a pure electric two-wheeled motorcycle, characterized in that: It includes a rear fork fixing seat. One side of the rear fork fixing seat is connected to the frame, and a power flat fork housing and a support flat fork are respectively arranged at both ends of the other side. An output shaft is rotatably connected between the power flat fork housing and the support flat fork. A motor cavity is arranged on the power flat fork housing. A gear cavity is arranged on one side of the motor cavity close to the output shaft. A driving motor is arranged in the motor cavity. A driving gear shaft and a driven gear that mesh with each other are arranged in the gear cavity, and the driving gear shaft and the driven gear are in a reduction drive. The driving gear shaft is connected to the motor shaft on the driving motor. One end of the output shaft extends into the gear cavity, and the driven gear is connected to the output shaft.

2. The power rear swingarm drive system of the pure electric two-wheel motorcycle according to claim 1, characterized in that: A sealing hole is arranged between the motor cavity and the gear cavity. The end of the motor shaft extends into the sealing hole, and an oil seal is arranged between the end of the motor shaft and the sealing hole.

3. The power rear swingarm drive system of the pure electric two-wheel motorcycle according to claim 2, characterized in that: A protruding first bearing hole is arranged on the inner wall of the motor cavity close to the gear cavity. The first bearing hole corresponds to the sealing hole, and a motor support bearing is arranged between the motor shaft and the first bearing hole.

4. The power rear swingarm drive system of the pure electric two-wheeled motorcycle according to claim 3, characterized in that: The end of the output shaft extending into the gear cavity is close to the inner wall of the gear cavity. A protruding second bearing hole is arranged on the inner wall of the gear cavity. The end of the output shaft extends into the second bearing hole, and an output support bearing is arranged between the end of the output shaft and the second bearing hole.

5. The power rear swingarm drive system of the pure electric two-wheeled motorcycle according to claim 3, characterized in that: The driven gear is connected to the end of the output shaft extending into the gear cavity. A retaining ring is arranged on the end of the output shaft, and the retaining ring is in contact with the driven gear.

6. The pure electric two-wheeled motorcycle power rear swingarm drive system according to any one of claims 1-5, characterized in that: The power flat fork housing and the rear fork fixing seat are fixedly connected by bolts and nuts.

7. The pure electric two-wheeled motorcycle power rear swingarm drive system according to claim 6, characterized in that: A number of reinforcing ribs are arranged on both the power flat fork housing and the support flat fork.

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