CN216508880U

CN216508880U - Driving assembly of electric vehicle hub

Info

Publication number: CN216508880U
Application number: CN202123456646.5U
Authority: CN
Inventors: 阮送良; 魏学勇; 陈玺宇
Original assignee: Taizhou Quanshun Electric Drive Technology Co ltd
Current assignee: Taizhou Quanshun Electric Drive Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-13
Anticipated expiration: 2031-12-31

Abstract

The utility model provides a driving assembly of an electric vehicle hub, and belongs to the technical field of electric vehicles. The driving assembly solves the technical problem that the existing driving assembly of the hub of the electric vehicle occupies large space. The driving assembly of the electric vehicle hub comprises a middle motor, a hub and a speed reducing structure, wherein the hub comprises a wheel core and a wheel rim, and is characterized in that an end cover part is integrally formed on one side of the wheel core, an accommodating cavity is formed between the end cover part and the inner circumferential surface of the wheel core, and the speed reducing structure is arranged in the accommodating cavity and is used for driving the wheel core to rotate by the middle motor. The utility model can improve the space utilization effect and the structure compactness.

Description

Driving assembly of electric vehicle hub

Technical Field

The utility model belongs to the technical field of electric vehicles, and relates to a driving assembly of an electric vehicle hub.

Background

The electric vehicle is an electric drive vehicle and is also named as an electric drive vehicle. Electric vehicles are classified into alternating current electric vehicles and direct current electric vehicles. Generally, an electric vehicle is a vehicle that uses a battery as an energy source, and converts electric energy into mechanical energy through a controller, a motor and other components to move so as to control the current and change the speed. At present, in the electric vehicle on the market, the motor for driving the rear wheel is arranged at the rear part of the vehicle frame, however, the size of the motor is limited due to the limitation of the installation space, so that only a few motors with smaller power can be installed, and partial manufacturers install the motors in the middle of the vehicle frame with larger space.

The chinese patent with the publication number of CN203544281U discloses a mid-motor structure of an electric vehicle, which comprises a motor, wherein the motor is in transmission connection with a speed reducer, the speed reducer is in transmission connection with a transmission device, the transmission device is in transmission connection with a rear wheel of the electric vehicle, the motor, the speed reducer and the transmission device are all arranged in a cover body, and the cover body is detachably connected with a frame of the electric vehicle.

The transmission of the scheme is stable, but the speed reducing structure is arranged between the motor and the driven disc, so that the occupied space is large.

Disclosure of Invention

The utility model provides a driving assembly of an electric vehicle hub aiming at the problems in the prior art, and the technical problems to be solved by the utility model are as follows: the driving assembly structure of the electric vehicle hub is more compact.

The purpose of the utility model can be realized by the following technical scheme:

the driving assembly of the electric vehicle hub comprises a middle motor, the hub and a speed reducing structure, wherein the hub comprises a wheel core and a wheel rim, and is characterized in that an end cover part is integrally formed on one side of the wheel core, an accommodating cavity is formed between the end cover part and the inner circumferential surface of the wheel core, and the speed reducing structure is arranged in the accommodating cavity and is used for driving the wheel core to rotate by the middle motor.

Put the driving motor of motor for installing at the frame middle part, but make full use of the great space in frame middle part, wheel hub includes wheel core and rim, and the periphery of rim is used for suit tire spare, and the wheel core is the inner circle structure, and the reduction structure is used for putting the high rotational speed deceleration that motor output to wheel hub in with and increases the square to be suitable for the demand that the electric motor car went, the reduction structure can be current electric motor car reduction structure on the market. Through the integrative end cap portion that sets up in one side at the wheel core, make end cap portion and wheel core inner peripheral surface form and hold the chamber, with the speed reduction structural design in holding the chamber, make full use of wheel core like this is as the casing of speed reduction structure, and the volume space at full use wheel core middle part further reduces horizontal size under the prerequisite of putting in driving motor and occupies, improves space utilization effect and compact structure nature.

In the driving assembly of the electric vehicle hub, the driving assembly further comprises a driven disc coaxially arranged with the hub, the driven disc is in transmission connection with the output end of the middle motor through a belt or a chain, and the driven disc and the input end of the speed reducing structure can synchronously rotate. The driven disc is directly driven by the middle motor, so that the output rotating speed can be initially reduced, the speed reduction requirement on the speed reduction structure is further reduced, and the size control of the speed reduction structure is facilitated; and the transmission is realized through a belt or a chain wheel, so that the long-distance accurate transmission can be conveniently realized, and the space is ensured to be compact.

In the driving assembly of the electric vehicle hub, the driving assembly further comprises a positioning shaft which is fixed with the frame relatively, and the positioning shaft is axially arranged in the hub in a penetrating manner. The positioning shaft can limit the position of the hub relative to the frame, and the position of the hub and the speed reducing structure is stable.

In the driving assembly of the electric vehicle hub, the speed reducing structure comprises a sun gear and a plurality of first planet gears meshed with the sun gear, the sun gear is an input end of the speed reducing structure, the first planet gears are rotationally connected to the hub, and when the sun gear rotates, the first planet gears can drive the hub to rotate. Therefore, after the sun wheel is driven, the first planet wheel meshed with the sun wheel can be directly or indirectly in transmission fit with the gear ring and the gear fixed relative to the frame, so that the first planet wheel rotates, the hub can rotate around the axis of the hub in a speed reduction manner, and the speed reduction transmission from the middle motor to the hub is further realized.

In the drive assembly of the above-mentioned electric vehicle hub, the speed reduction structure further includes a fixed gear and a plurality of second planet gears respectively engaged with the first planet gears, the second planet gears are rotatably connected to the hub, the fixed sleeve of the fixed gear is disposed on the outer peripheral surface of the positioning shaft, and the second planet gears are simultaneously engaged with the fixed gear. Therefore, the second planet wheel is meshed with the first planet wheel and the fixed gear respectively to realize transmission, and the fixed gear is smaller than a gear ring in radial size, so that the radial size of the whole speed reduction structure is further controlled while speed reduction transmission is realized.

In the driving assembly of the electric vehicle hub, the sun gear is sleeved on the periphery of the positioning shaft, and the driven disc is sleeved on the periphery of the sun gear and positioned with the sun gear in the circumferential direction. Therefore, the driven disc directly drives the sun wheel to rotate, the transmission path outside the hub is ensured to be more simplified, and the improvement of the structure compactness is facilitated.

In the driving assembly of the electric vehicle hub, the second planet wheel comprises a large tooth column meshed with the first planet wheel and a small tooth column meshed with the fixed gear, and the large tooth column and the small tooth column are coaxially arranged. Therefore, the reduction transmission can be further carried out from the large tooth column to the small tooth column, the size of the reduction structure is favorably controlled, and the structure compactness is improved.

Compared with the prior art, the utility model has the following advantages:

this drive assembly of electric motor car wheel hub drives the wheel hub rotation through with speed reduction structural design in wheel hub's inner chamber, make full use of the volume space at wheel hub middle part like this, further reduce horizontal size under the prerequisite of putting in driving motor and occupy, improve space utilization effect and compact structure nature.

Drawings

Fig. 1 is a schematic perspective view of the present embodiment.

Fig. 2 is a schematic perspective view of another angle in the present embodiment.

Fig. 3 is a perspective view of a part of the hub according to the embodiment.

Fig. 4 is a perspective view of a partial structure of the present embodiment.

Fig. 5 is a perspective view of the deceleration structure and the positioning shaft in this embodiment.

In the figure, 1, a motor is arranged in the middle; 2. a hub; 21. a wheel core; 211. an end cap portion; 22. a rim;

3. a deceleration structure; 31. a sun gear; 32. a planet wheel I; 33. a planet wheel II; 331. a large toothed column; 332. a small toothed column; 34. a fixed gear;

4. a driven plate; 5. positioning the shaft; 6. a receiving cavity.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-5, the driving assembly of the electric vehicle hub includes a central motor 1, a hub 2 and a speed reducing structure 3, the hub 2 includes a wheel core 21 and a wheel rim 22, an end cover portion 211 is integrally formed on one side of the wheel core 21, an accommodating cavity 6 is formed between the end cover portion 211 and an inner circumferential surface of the wheel core 21, the speed reducing structure 3 is disposed in the accommodating cavity 6, and an output end of the central motor 1 is in transmission connection with an input end of the speed reducing structure 3 and drives the wheel core 21 to rotate. The middle motor 1 is a driving motor arranged in the middle of the frame, the large space in the middle of the frame can be fully utilized, the periphery of the wheel hub 2 is used for sleeving a tire part, the speed reducing structure 3 is used for outputting the middle motor 1 to the high rotating speed reducing and moment increasing of the wheel hub 2 so as to meet the driving requirement of an electric vehicle, and the speed reducing structure 3 can be a conventional speed reducing structure 3 of the electric vehicle sold in the market. Through designing reduction structure 3 in wheel hub 2's inner chamber and drive wheel hub 2 and rotate, make full use of the volume space at 2 middle parts of wheel hub like this further reduces horizontal size and occupies under the prerequisite of putting in driving motor, improves space utilization effect and compact structure nature. Further, the driving assembly further comprises a driven disc 4 coaxially arranged with the hub 2, the driven disc 4 is in transmission connection with the output end of the middle motor 1 through a belt or a chain, and the driven disc 4 and the input end of the speed reducing structure 3 rotate synchronously. The driven disc 4 is directly driven by the middle motor 1, so that the output rotating speed can be preliminarily reduced, the speed reduction requirement on the speed reduction structure 3 is further reduced, and the size control of the speed reduction structure 3 is facilitated; and the transmission is realized through a belt or a chain wheel, so that the long-distance accurate transmission can be conveniently realized, and the space is ensured to be compact. The driving assembly further comprises a positioning shaft 5 fixedly connected with the frame, and the positioning shaft 5 axially penetrates through the hub 2. The positioning shaft 5 defines the position of the hub 2 relative to the frame, and the position of the hub 2 and the reduction mechanism 3 is stable.

As shown in fig. 3-5, the reduction structure 3 comprises a sun gear 31 and two first planet gears 32 engaged with the sun gear 31, the sun gear 31 is an input end of the reduction structure 3, the two first planet gears 32 are rotationally connected to the hub 2 and are arranged in a central symmetry, and when the sun gear 31 rotates, the hub 2 can be driven to rotate through the first planet gears 32. Thus, after the sun wheel 31 is driven, the first planet wheel 32 meshed with the sun wheel can be directly or indirectly in transmission fit with a gear ring fixed relative to the frame, so that the hub 2 can rotate around the axis of the hub 2 in a speed reducing manner while the first planet wheel 32 rotates, and the speed reducing transmission from the middle motor 1 to the hub 2 is further realized. Preferably, the reduction structure 3 further comprises a fixed gear 34 and two planet gears 33 respectively meshed with the two planet gears one 32, the planet gears two 33 are rotatably connected to the hub 2, the fixed gear 34 is fixedly sleeved on the outer peripheral surface of the positioning shaft 5, and the two planet gears 33 are arranged in a central symmetry manner and simultaneously meshed with the fixed gear 34. Therefore, the second planet wheels 33 are respectively meshed with the first planet wheels 32 and the fixed gear 34 to realize transmission, and the fixed gear 34 has smaller radial size than a gear ring, so that the radial size of the whole speed reducing structure 3 can be further controlled while speed reducing transmission is realized. The sun gear 31 is sleeved on the periphery of the positioning shaft 5, and the driven disc 4 is sleeved on the periphery of the sun gear 31 and is circumferentially positioned with the sun gear 31. Therefore, the driven disc 4 directly drives the sun wheel 31 to rotate, the transmission path outside the hub 2 is ensured to be more simplified, and the improvement of the structural compactness is facilitated. The second planet wheel 33 comprises a large tooth column 331 meshed with the first planet wheel 32 and a small tooth column 332 meshed with the fixed gear 34, and the large tooth column 331 and the small tooth column 332 are coaxially arranged. Therefore, the reduction transmission can be further carried out from the large tooth column 331 to the small tooth column 332, which is beneficial to controlling the size of the reduction structure 3 and improving the structure compactness.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The driving assembly of the electric vehicle wheel hub comprises a centrally-mounted motor (1), the wheel hub (2) and a speed reducing structure (3), wherein the wheel hub (2) comprises a wheel core (21) and a wheel rim (22), the driving assembly is characterized in that an end cover part (211) is integrally formed on one side of the wheel core (21), a containing cavity (6) is formed between the end cover part (211) and the inner circumferential surface of the wheel core (21), and the speed reducing structure (3) is arranged in the containing cavity (6) and is used for driving the wheel core (21) to rotate by the centrally-mounted motor (1).

2. The drive assembly of the electric vehicle hub according to claim 1, characterized in that the drive assembly further comprises a driven disc (4) coaxially arranged with the hub (2), the driven disc (4) is in transmission connection with the output end of the centrally-mounted motor (1) through a belt or a chain, and the driven disc (4) rotates synchronously with the input end of the speed reducing structure (3).

3. The drive assembly of the electric vehicle hub according to claim 2, characterized in that the drive assembly further comprises a positioning shaft (5) fixed relative to the vehicle frame, and the positioning shaft (5) is axially inserted into the hub (2).

4. The drive assembly of the electric vehicle hub according to claim 3, wherein the reduction structure (3) comprises a sun gear (31) and a plurality of first planet gears (32) meshed with the sun gear (31), the sun gear (31) is an input end of the reduction structure (3), the first planet gears (32) are rotatably connected to the hub (2), and the hub (2) can be driven to rotate through the first planet gears (32) when the sun gear (31) rotates.

5. The drive assembly of the electric vehicle hub as claimed in claim 4, wherein the reduction structure (3) further includes a fixed gear (34) and a plurality of second planet gears (33) respectively engaged with the plurality of first planet gears (32), the second planet gears (33) are rotatably connected to the hub (2), the fixed gear (34) is fixedly sleeved on the outer peripheral surface of the positioning shaft (5), and the plurality of second planet gears (33) are simultaneously engaged with the fixed gear (34).

6. The drive assembly of the electric vehicle hub according to claim 4, wherein the sun gear (31) is sleeved on the periphery of the positioning shaft (5), and the driven disc (4) is sleeved on the periphery of the sun gear (31) and is circumferentially positioned with the sun gear (31).

7. The drive assembly of the electric vehicle hub according to claim 5, characterized in that the second planet wheel (33) comprises a large tooth column (331) meshed with the first planet wheel (32) and a small tooth column (332) meshed with the fixed gear (34), and the large tooth column (331) and the small tooth column (332) are coaxially arranged.