CN216969909U - Shaft transmission system for electric motorcycle and electric motorcycle - Google Patents

Abstract

The utility model discloses a shaft transmission system for an electric motorcycle and the electric motorcycle, wherein the shaft transmission system comprises a gear box for driving a rear wheel of a vehicle to rotate and a universal joint transmission device with two universal joints, the first universal joint forms a power input end, and the second universal joint is connected between a transmission shaft and the gear box; the first universal joint is provided with a torque transmission structure matched with a motor output shaft of a driving motor forming a power source; or the free end of the first universal joint is provided with a coupler, and the coupler is used for being connected with a motor output shaft of a driving motor forming a power source. The electric motorcycle comprises the shaft transmission system. The utility model has the advantages that the shaft transmission system is suitable for the motorcycle with the motor output shaft arranged backwards in the longitudinal direction, and is beneficial to configuring a large-capacity battery so as to meet the requirement of long endurance; meanwhile, the cost can be saved, and the failure occurrence probability caused by the failure of the front transmission case can be eliminated; the electric motorcycle has the same beneficial effects as a shaft transmission system.

Description

Shaft transmission system for electric motorcycle and electric motorcycle

Technical Field

The utility model relates to a motorcycle axle transmission system, in particular to an electric motorcycle axle transmission system and an electric motorcycle.

Background

An electric motorcycle is a motorcycle which takes a battery as an energy source and converts electric energy into mechanical energy by a motor. The existing electric motorcycle mainly has three structural forms, namely a hub motor structure, and a motor is arranged in a hub. The other is a side-hung motor structure, and a motor reducer is arranged outside one side of the hub; still another is to arrange the motor on the frame and transmit power to the rear wheel hub through a chain or a transmission shaft. Among the three structures, the structure that the motor is arranged on the frame is closer to the layout of the traditional motorcycle, the heat dissipation performance of the motor is good, the size can be larger, the corresponding power can be higher, and the development trend of the electric motorcycle is met. Meanwhile, the transmission shaft mode can effectively and obviously improve the use safety and the service life of the power system, and a new development trend is formed. The existing shaft transmission system generally comprises a front transmission case, a transmission shaft and a rear transmission case, wherein the front transmission case is used for connecting power output by a motor in an electric motorcycle, the transmission system is only suitable for vehicles with motor output shafts arranged transversely in the same direction as the power output shafts of the traditional internal combustion engine, but not suitable for vehicles with motor output shafts arranged longitudinally, and the motor of the arrangement mode needs to occupy the longitudinal space of the vehicle, occupies the space of a battery and correspondingly influences the endurance mileage. And the longitudinal arrangement mode of the motor can be arranged on the side surface of the vehicle, so that the longitudinal space of the vehicle can be effectively saved, the volume and the capacity of the battery can be effectively increased, and the endurance mileage can be increased. Therefore, in order to adapt to the longitudinal arrangement mode of the motor, the existing shaft transmission system needs to be improved.

Disclosure of Invention

The utility model aims at overcoming the defect that the conventional shaft transmission system for the electric motorcycle is not suitable for the longitudinal arrangement of the motor, and provides the shaft transmission system for the electric motorcycle, which is characterized in that a universal joint at a power input end in a universal joint transmission shaft device is designed into a structure capable of being connected with a motor output shaft, or a coupling connected with the motor output shaft is arranged on the universal joint at the power input end, so that when the shaft transmission system is used for the electric motorcycle, the shaft transmission system is directly connected with the motor output shaft longitudinally arranged through the corresponding universal joint or the coupling, the longitudinal arrangement of the motor is met, the long endurance requirement of a battery arrangement space is increased, a front gear box in the conventional transmission system is omitted, the manufacturing and using cost is saved, and the fault occurrence probability caused by the fault of the front gear box is eliminated. A second object of the present invention is to provide an electric motorcycle having the aforementioned shaft transmission system.

In order to achieve the first object, the utility model adopts the following technical scheme.

A kind of electric motorcycle uses the drive system of the axle, including gear box and cardan drive unit used for driving the rear wheel of the vehicle to rotate, the cardan drive unit is made up of drive shaft and two cardan joints located at both ends of drive shaft, the first cardan joint forms the power input end, the second cardan joint connects between said gear box and the drive shaft; the first universal joint is provided with a torque transmission structure matched with a motor output shaft of a driving motor forming a power source; or the free end of the first universal joint is provided with a coupler, and the coupler is used for being connected with a motor output shaft of a driving motor forming a power source.

By adopting the shaft transmission system of the technical scheme, the universal joint of the power input end in the universal joint transmission shaft device is designed into a structure which can be connected with the motor output shaft, or the universal joint of the power input end is provided with the coupling which is connected with the motor output shaft, so that when the shaft transmission system is used for an electric motorcycle, the shaft transmission system is directly connected with the motor output shaft which is longitudinally arranged through the corresponding universal joint or the coupling, thereby being suitable for the motorcycle with the motor output shaft which is longitudinally arranged backwards, freeing up space for arranging a large-capacity battery, being beneficial to configuring the large-capacity battery and meeting the long-endurance requirement; meanwhile, a front transmission case in the existing transmission system is omitted, so that the manufacturing and using cost can be saved, and the probability of failure caused by the failure of the front transmission case can be eliminated.

Preferably, the torque transmission structure is composed of one of a key transmission structure, a pin transmission structure, a spline transmission structure and a polygonal column hole matching structure. Various torque transmission structures in the prior art are utilized to form various structural forms, so that various selection modes are formed according to different transmission torque sizes and corresponding matching technologies, and the manufacturing efficiency is improved and the cost is reduced.

Preferably, the first universal joint and the second universal joint are both in a cross universal joint structure. The convenience of purchase or customization is improved by utilizing a common structure, the product development period is shortened, and the production and use cost is reduced.

Preferably, a rigid protective cover is arranged outside the universal joint transmission device and fixedly connected to a box body of the gear box, the front end of the rigid protective cover forms a motorcycle bottom fork through a bottom fork pipe structure at the front end, and a shock absorber mounting lug is arranged on the motorcycle bottom fork. The motorcycle bottom fork is fused on a transmission system, so that the motorcycle structure is more compact.

Preferably, the box body comprises a main box body, the main box body is in a pipe shape, and the main box body is fixedly connected with the rigid protective cover through the suction nozzle end of the pipe; the rigid protective cover is of a q-shaped structure, and the q-shaped small end of the rigid protective cover is connected with the main box body; the bottom fork tube structure is positioned at the q-shaped large end. The structural strength and rigidity of the motorcycle bottom fork are enhanced by means of the main box body and the special shape, and the service life is prolonged.

Further preferably, the rigid protective cover and the main box body are fixedly connected through connecting lugs at the upper side and the lower side by bolts. So as to enhance the connection strength and reliability of the two through the connecting lugs.

Further preferably, the bottom fork tube structure comprises a tube hole, needle roller bearings are arranged at two ends in the tube hole, and a liner tube is arranged between the two needle roller bearings. Ensure the articulated flexibility of chain stay and motorcycle frame through bearing to better adaptation pothole road conditions environment improves the travelling comfort of riding.

Further preferably, the gearbox further comprises an input bevel gear and an output bevel gear disc which are meshed with each other, and the input bevel gear is connected with the universal joint transmission device; the output bevel gear disc is fixedly connected with a flange plate through an intermediate shaft in spline fit, the flange plate is also fixedly fastened through a locking nut, and spline fit parameters between the intermediate shaft and the output bevel gear disc and between the intermediate shaft and the flange plate are the same; the flange plate is fixedly connected with a hub bolt for fixedly connecting a rear hub, and the flange plate is also fixedly connected with a brake disc. Through the jackshaft with the direct fixed connection of ring flange on the output awl fluted disc, make the ring flange rotate along with the output awl fluted disc is synchronous, and then wheel hub synchronous rotation after driving through flange and rear wheel hub's wheel hub bolt, stir rear wheel hub for current claw of stirring through the output awl fluted disc, the output awl fluted disc has formed the rigidity rigid connection with rear wheel hub, the vehicle opens and stops the process and does not have the impact, it is steady to open and stop the action, need not to set up the buffer and absorb impact energy, the buffer fragile hidden danger has been eliminated, power transmission efficiency is high, long service life. The intermediate shaft is preferably of a tubular structure, so that the weight is reduced and the energy consumption is reduced.

Still further preferably, the inner end of the intermediate shaft is rotatably supported on the main case; the output bevel gear disc is rotatably supported on the box cover; the hub bolt is provided with a straight knurling section, and the hub bolt is matched and riveted with a matching hole on the flange plate through the straight knurling section. Two-point supporting structure of the output conical fluted disc is formed by the aid of the intermediate shaft, and supporting stability and reliability of the output conical fluted disc are improved.

In order to achieve the second object, the utility model adopts the following technical scheme.

An electric motorcycle includes a shaft transmission system for an electric motorcycle that achieves a first object.

The electric motorcycle adopting the scheme has the same beneficial effects of the shaft transmission system, compact structure and long service life.

The utility model has the advantages that the utility model is suitable for the motorcycle with the motor output shaft arranged backwards along the longitudinal direction, saves space for arranging a large-capacity battery, is beneficial to configuring the large-capacity battery and meets the requirement of long endurance; meanwhile, a front transmission case in the existing transmission system is omitted, so that the manufacturing and using cost can be saved, and the failure occurrence probability caused by the failure of the front transmission case can be eliminated; the electric motorcycle has the same beneficial effects as a shaft transmission system.

Drawings

Fig. 1 is a schematic isometric view of the structure of the present invention.

Fig. 2 is a schematic perspective view of a part of the structure of the present invention, and shows the internal structure of the rigid shield and the main case of the gear case after being cut along the axis of the transmission shaft.

Figure 3 is a structural schematic isometric view of another perspective of the present invention.

Fig. 4 is a schematic sectional view of a part of the structure of the present invention.

Detailed Description

The utility model will be further described with reference to the drawings, but the utility model is not limited thereby within the scope of the embodiments described.

Embodiment 1, referring to fig. 1, 2, 3 and 4, an electric motorcycle shaft transmission system for transmitting the rotational output power of a drive motor 5 longitudinally disposed on a motorcycle frame to a rear hub 14 and disposed on the right side of the vehicle; the rear wheel transmission device comprises a gear box 1 and a universal joint transmission device, wherein the gear box 1 is used for driving rear wheels of a vehicle to rotate, the universal joint transmission device consists of a transmission shaft 2 and two universal joints positioned at two ends of the transmission shaft, a first universal joint 3 forms a power input end, and a second universal joint 4 is connected between the transmission shaft 2 and the gear box 1; the first universal joint 3 has a torque transmission structure matched with a motor output shaft of a driving motor 5 constituting a power source; the torque transmission structure is composed of a spline transmission structure, and specifically, an internal spline matched with an external spline on a motor output shaft of the driving motor 5 is arranged at the free end of the first universal joint 3.

Wherein, first universal joint 3 and second universal joint 4 all are cross universal joint structure. A rigid protective cover 6 is arranged outside the universal joint transmission device, the rigid protective cover 6 is fixedly connected to a box body of the gear box 1, the front end of the rigid protective cover 6 forms a motorcycle bottom fork through a bottom fork pipe structure 7 at the front end, and a shock absorber mounting support lug 8 of a U-shaped insertion structure is arranged on the motorcycle bottom fork.

The box body comprises a main box body 11, the main box body 11 is in a pipe shape, and the main box body 11 is fixedly connected with the rigid protective cover 6 through a suction nozzle end of the pipe; the rigid protective cover 6 is of a q-shaped structure, and the q-shaped small end of the rigid protective cover 6 is connected with the main box body 11; the bottom fork tube structure 7 is positioned at the large end of the q shape. The rigid protective cover 6 is fixedly connected with the main box body 11 through connecting lugs at the upper side and the lower side, wherein bolts 26 and nuts 27 are arranged on the connecting lugs, and the bolts 26 are stepped hinged bolts, so that the rigid protective cover 6 is connected with the main box body 11 more firmly and reliably. The connecting lug 10 of the main box body 11 is in a U-shaped fork structure, and the connecting lug on the rigid protective cover 6 is matched in a fork groove of the U-shaped fork. A spigot matching structure is formed between the rigid protective cover 6 and the main box body 11, a hole of the spigot matching structure is formed in the main box body 11, a convex ring matched with the hole is formed on the rigid protective cover 6, and a first O-shaped sealing ring 21 is further arranged on the spigot matching structure. The main box body 11 is provided with a counter bore for hiding the head of the bolt and the nut, the outer side of the head of the bolt 26 is provided with a decorative cover 28, and the decorative cover 28 is tightly matched with the opening of the counter bore.

The bottom fork tube structure 7 comprises a tube hole, needle bearings 71 are arranged at two ends in the tube hole, a lining tube is arranged between the two needle bearings 71, and the needle bearings 71 are sleeved on a lining 72. The bush 72 also has a seal 73 around it, through which the fork is hinged to the frame.

The gearbox 1 also comprises an input bevel gear 20 and an output bevel gear disc 12 which are meshed with each other, wherein the input bevel gear 20 is in a bevel gear shaft structure and is connected with a universal joint transmission device through a spline matching structure; the input bevel gear 20 is rotatably arranged on the main box body 11 through a pair of tapered roller bearings 29, a first framework oil seal 23 is arranged between the shaft neck of the input bevel gear 20 and the mounting hole of the main box body 11, a main decoration cover 33 is arranged on the outer side of the first framework oil seal 23, and the main decoration cover 33 is embedded on the main box body 11; the main box body 11 is also screwed with an oil filling screw plug 34 through an oil filling hole, is provided with a vent cap 35 through a vent hole, and is screwed with an oil drain screw plug 36 through an oil drain hole; the output conical fluted disc 12 is fixedly connected with a flange plate 13 through an intermediate shaft 17 which is in spline fit and is in a tubular structure, the flange plate 13 is also fixedly fastened through a locking nut 18, spline fit parameters between the intermediate shaft 17 and the output conical fluted disc 12 and between the intermediate shaft 17 and the flange plate 13 are the same, a column hole fit section is also formed between the intermediate shaft 17 and the output conical fluted disc 12, and a second O-shaped sealing ring 22 is arranged on the column hole fit section; the flange plate 13 is fixedly connected with a hub bolt 15 for fixedly connecting a rear hub 14, the flange plate 13 is also fixedly connected with a brake disc 16, and the brake disc 16 is fixedly connected with a rotating speed signal disc 16 a.

The inner end of the intermediate shaft 17 is rotatably supported on the main box body 11 through an inner end small bearing 30, a mounting hole for mounting the intermediate shaft 17 in the main box body 11 is of a through hole structure, a third framework oil seal 23 is arranged between the inside of the through hole and the intermediate shaft 17, and a retaining cover 24 is tightly matched and fixed on the outer side of the third framework oil seal 23; the output conical fluted disc 12 is rotatably supported on a box cover 19 through an outer end large bearing 31, the box cover 19 is fixedly connected with the main box body 11 through bolts, the two are positioned through a spigot matching structure, a third type sealing ring 32 is arranged at the spigot matching structure, a brake caliper mounting part 19a and a rotating speed sensor mounting part 19b are further arranged on the box cover 19, and a fourth framework oil seal 25 is arranged on the outer side of the outer end large bearing 31; the hub bolt 15 is formed with the straight knurling section, and the hub bolt 15 is riveted on the flange plate 13 through the matching hole cooperation of the straight knurling section and the flange plate 13.

In this embodiment, the torque transmission structure at the free end of the first universal joint 3 may further be formed by one of a key transmission structure, a pin transmission structure and a polygonal cylindrical hole matching structure, so as to replace the torque transmission structure formed by the spline transmission structure.

In this implementation, the free end of the first universal joint 3 may further be provided with a coupling, which is used to connect with a motor output shaft of a driving motor constituting a power source, thereby replacing the scheme in which the free end of the first universal joint 3 is provided with a torque transmission structure.

The universal joint in the embodiment can also adopt a ball cage structure to replace a cross structure.

Embodiment 2, with reference to fig. 1, 2, 3 and 4, an electric motorcycle includes the electric motorcycle shaft transmission system of embodiment 1.

The rest of the structure of this embodiment is the same as embodiment 1, and is not described herein again.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A shaft transmission system for an electric motorcycle comprises a gear box (1) for driving a rear wheel of a vehicle to rotate and a universal joint transmission device, wherein the universal joint transmission device consists of a transmission shaft (2) and two universal joints positioned at two ends of the transmission shaft, a first universal joint (3) forms a power input end, and a second universal joint (4) is connected between the transmission shaft (2) and the gear box (1); the first universal joint (3) is characterized by having a torque transmission structure matched with a motor output shaft of a driving motor (5) forming a power source; or the free end of the first universal joint (3) is provided with a coupling which is used for being connected with a motor output shaft of a driving motor forming a power source.

2. The electric motorcycle shaft transmission system according to claim 1, wherein the torque transmission structure is constituted by one of a key transmission structure, a pin transmission structure, a spline transmission structure, and a polygonal cylindrical hole fitting structure.

3. Electric motorcycle shaft transmission system according to claim 1, characterised in that said first (3) and second (4) universal joints are both of a cross-joint configuration.

4. The electric motorcycle shaft transmission system according to claim 1, wherein a rigid protective cover (6) is arranged outside the universal joint transmission device, the rigid protective cover (6) is fixedly connected to a box body of the gear box (1), the front end of the rigid protective cover (6) forms a motorcycle bottom fork through a bottom fork pipe structure (7) at the front end, and a shock absorber mounting lug (8) is arranged on the motorcycle bottom fork.

5. Motor cycle shaft transmission system according to claim 4, wherein said box comprises a main box (11), the main box (11) being of a pipe shape, the main box (11) being fixedly connected to said rigid shield (6) through the mouth end of the pipe; the rigid protective cover (6) is of a q-shaped structure, and the q-shaped small end of the rigid protective cover (6) is connected with the main box body (11); the bottom fork tube structure (7) is positioned at the q-shaped large end.

6. An electric motorcycle shaft transmission system according to claim 5, wherein the rigid shield (6) and the main body (11) are fixedly connected by bolts provided at the upper and lower engaging lugs.

7. Electric motorcycle shaft transmission system according to claim 4, characterized in that the bottom fork tube structure (7) comprises a tube bore, in which needle bearings (71) are provided at both ends, and a liner tube (72) is provided between the needle bearings (71).

8. An electric motorcycle shaft transmission system according to claim 4, characterised in that the gearbox (1) further comprises an input bevel gear (20) and an output bevel gear disc (12) which mesh with each other, the input bevel gear (20) being connected to the cardan transmission; the output conical fluted disc (12) is fixedly connected with a flange plate (13) through an intermediate shaft (17) in spline fit, the flange plate (13) is also fastened and fixed through a locking nut (18), and spline fit parameters between the intermediate shaft (17) and the output conical fluted disc (12) and between the intermediate shaft (17) and the flange plate (13) are the same; the flange plate (13) is fixedly connected with a hub bolt (15) for fixedly connecting a rear hub (14), and the flange plate (13) is also fixedly connected with a brake disc (16).

9. Electric motorcycle shaft transmission system according to claim 8, characterized in that the inner end of the intermediate shaft (17) is rotatably supported on the main box (11); the output conical fluted disc (12) is rotatably supported on the box cover (19); the hub bolt (15) is provided with a straight knurling section, and the hub bolt (15) is matched and riveted with the flange plate (13) through the straight knurling section and a matching hole on the flange plate (13).

10. An electric motorcycle comprising the shaft transmission system for an electric motorcycle according to any one of claims 1 to 9.

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