CN212195087U

CN212195087U - Double-motor transmission system for racing car and electric car

Info

Publication number: CN212195087U
Application number: CN202021033607.7U
Authority: CN
Inventors: 冉晓珂; 唐岚
Original assignee: Xihua University
Current assignee: Xihua University
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-12-22
Anticipated expiration: 2030-06-08

Abstract

The utility model provides a double-motor transmission system for racing cars and electric automobiles, which comprises a composite secondary reduction box, wherein the composite secondary reduction box comprises a left box body and a right box body, and reducer components which are arranged in a mirror symmetry manner along the longitudinal direction of the vehicle are arranged in the left box body and the right box body; wherein the speed reducer assembly comprises: the power output device comprises a motor, an input gear shaft connected with the motor, a secondary gear set connected with the input gear shaft and rotating synchronously, and a tertiary gear meshed with the secondary gear set, wherein the outer side of the tertiary gear is connected with a half shaft for power output through a constant velocity universal joint; the secondary gear sets of the left box body and the right box body are connected through a secondary coupling, and the tertiary gear sets of the left box body and the right box body are connected through a tertiary coupling. The utility model discloses merge into one with two sets of reducers that bi-motor transmission system needs, reduce part figure and structural style is simple, makes things convenient for the dismouting.

Description

Double-motor transmission system for racing car and electric car

Technical Field

The utility model relates to a vehicle transmission system correlation technique field specifically is a double-motor transmission system of cycle racing and electric automobile.

Background

The center of mass of the vehicle affects the performance of the whole vehicle, and has certain requirements on the arrangement mode and the structural form of a transmission system. At present, the power systems of racing cars and single electric vehicles (especially pure electric vehicles) all include: power motor, speed reducer, differential mechanism, etc. The parts are often independently mounted, which has high requirements on the assembly precision of the mechanical system and high processing difficulty, and each part is usually mounted on a frame or a drive axle, and a large number of fixing mechanism parts are needed, so that the transmission system has large volume, heavy weight and high cost.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art, the utility model discloses combine prior art, from practical application, provide one kind with two originally should reduction gears integration of bi-motor and guarantee compact structure, lightweight, pure electric vehicles transmission system that factor of safety is high.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a double-motor transmission system for racing cars and electric automobiles comprises a composite secondary reduction box, wherein the composite secondary reduction box comprises a left box body and a right box body, and speed reducer assemblies which are arranged in a mirror symmetry mode along the longitudinal direction of a vehicle are arranged in the left box body and the right box body; wherein the speed reducer assembly comprises:

the power output device comprises a motor, an input gear shaft connected with the motor, a secondary gear set connected with the input gear shaft and rotating synchronously, and a tertiary gear meshed with the secondary gear set, wherein the outer side of the tertiary gear is connected with a half shaft for power output through a constant velocity universal joint;

the secondary gear sets of the left box body and the right box body are connected through a secondary coupling, and the tertiary gear sets of the left box body and the right box body are connected through a tertiary coupling.

Furthermore, the secondary coupling connects the secondary gear set through a cylindrical roller bearing to realize a differential function;

and the three-stage coupling connects the three-stage gear through a cylindrical roller bearing to realize a differential function.

Furthermore, the secondary gear set is connected with the corresponding left box body or right box body through a deep groove ball bearing, and the tertiary gear is connected with the corresponding left box body or right box body through a deep groove ball bearing.

Further, the outer side of the third-stage gear is provided with an inner ball cage cavity, the constant-speed universal joint is a tripod constant-speed universal joint, and the third-stage gear is connected with the tripod constant-speed universal joint through the inner ball cage cavity and transmits torque to the hub through a half shaft.

Furthermore, motor support frames are arranged on two sides of the combined type secondary reduction gearbox, and the combined type secondary reduction gearbox is connected with the vehicle frame body.

Furthermore, an output shaft flange plate of the motor is connected with an input gear shaft through an involute spline and is locked by a locking nut.

Further, the secondary gear set comprises two gears which are coaxially arranged, wherein one gear is used for being meshed and matched with the input gear shaft, and the other gear is used for being meshed and matched with the tertiary gear.

Further, the outer sides of the left box body and the right box body are respectively provided with a sealing end cover and a sealing rubber cover.

Furthermore, the left box body and the right box body are connected into a whole through screws.

The utility model has the advantages that:

the utility model skillfully simplifies two sets of speed reducers with double motors into a composite speed reducer and realizes the differential function; the whole structure has higher compactness and safety under the wrapping of the reducer box body, the whole power part has greatly reduced number of parts because two sets of reducers are skillfully simplified into a combined reducer, the cost is reduced while the weight is reduced, the whole structure of the transmission system is compact, the occupied space is small, and the whole structure is easy to assemble and disassemble and maintain; simultaneously the utility model discloses transmission system is whole efficient, whole smooth operation brings for the automobile body vibrations volume little, small in noise, semi-axis straightness nature is good.

Drawings

FIG. 1 is an isometric view of the overall structure of the present invention with the reducer housing removed;

FIG. 2 is a sectional view of the internal structure of the present invention;

fig. 3 is an isometric view of the overall structure of the present invention;

figure 4 is the utility model discloses tertiary gear axle mapping.

The reference numbers shown in the figures:

101. a right box body; 102. a left box body; 103. locking the bolt; 104. an input gear shaft; 105. a secondary gear set; 106. a third-stage gear; 107. a deep groove ball bearing; 108. a cylindrical roller bearing; 109. a secondary coupling; 110. a third-stage coupling; 111. sealing the end cap; 112. sealing the rubber cover; 113. tripod constant velocity joints; 114. a half shaft; 201. a motor support frame; 202. the motor output shaft flange.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

As shown in FIGS. 1-4, the embodiment of the present invention provides a dual-motor transmission system for racing cars and electric vehicles.

The system comprises a composite two-stage reduction gearbox, wherein the box body of the composite two-stage reduction gearbox is in mirror symmetry along the longitudinal direction of the automobile, and the composite two-stage reduction gearbox comprises a left box body 102 and a right box body 101.

The components in the left and

right cases

102 and 101 include: two motors, the motor output shaft flange 202 and the input gear shaft 104 are connected through an involute spline and locked by a locking nut 103, the output end of the composite secondary reduction box is connected with the half shaft 114, the right box body 101 comprises the input gear shaft 104, a secondary gear set 105 and a tertiary gear 106, and the mirror image corresponding to the left box body 102 is formed. The secondary gear set 105 and the tertiary gear 106 are connected with each other by a secondary coupling 109 and a tertiary coupling 110 through cylindrical roller bearings 108, respectively, with respect to mirror images thereof. The secondary coupling 109 connects the secondary gear set 105 through the cylindrical roller bearing 108 to realize a differential function, and the tertiary coupling 110 is similar.

Specifically, the right box body 101 of the speed reducer is in a three-layer gourd shape, an input gear shaft 104, a secondary gear set 105 and a tertiary gear 106 are sequentially arranged in each layer gourd, the secondary gear set 105 and the tertiary gear 106 are connected with the right box body 101 through a deep groove ball bearing 107, the left box body 102 of the speed reducer is in a mirror image relation with the left box body, and the two are connected through screws to form a complete speed reducer with the appearance of a three-layer gourd.

The left side of the third-stage gear 106 is provided with a bearing mounting seat which is connected with a cylindrical roller bearing 108 to realize differential speed, and the right side is provided with an inner ball cage cavity which is connected with a tripod constant velocity universal joint 113 to transmit torque to a hub through a half shaft 114.

The motor supporting frame 201 is arranged on one side of the composite speed reducer, the composite speed reducer is directly connected with the frame, the motor supporting frame 201 is installed on the end face of the motor through bolts, and the half shaft 114 is directly inserted into the inner ball cage of the third-stage gear 106 through the tripod constant-velocity universal joint 113.

The utility model discloses a left side box 102 and the right box 101 outside all are equipped with end cover 111 and sealing rubber cover 112.

The utility model provides an among the transmission system, power transmission path is: the output shaft of the motor, the input gear shaft 104, the secondary gear set 105, the tertiary gear 106, the left half shaft 114, the right half shaft 114 and the left wheel.

Two motor drive system generally need two sets of decelerator, the utility model discloses merge into one with two reduction gears are ingenious, reduce part figure, make drive system structure compacter, the overall structure dismouting is simple to two sets of gear trains can realize the differential each other and do not influence in the combined type reduction gear, inside the transmission semi-axis disect insertion reduction gear, transmission efficiency is high, and the semi-axis linearity is good. Practice proves that the arrangement mode can effectively enable the lengths of the left half shaft and the right half shaft to be equal, so that the linearity and the stability of vehicle running are improved.

Claims

1. A double-motor transmission system for racing cars and electric automobiles is characterized by comprising a composite secondary reduction box, wherein the composite secondary reduction box comprises a left box body and a right box body, and speed reducer assemblies which are arranged in a mirror symmetry mode along the longitudinal direction of a vehicle are arranged in the left box body and the right box body; wherein the speed reducer assembly comprises:

2. The dual-motor transmission system for the racing car and the electric car as claimed in claim 1, wherein the secondary coupling connects the secondary gear set through a cylindrical roller bearing to realize a differential function;

3. The dual-motor transmission system for racing cars and electric cars of claim 1, wherein the secondary gear set is connected with the corresponding left box or right box through a deep groove ball bearing, and the tertiary gear set is connected with the corresponding left box or right box through a deep groove ball bearing.

4. The dual motor transmission system for racing and electric vehicles as claimed in claim 1, wherein the outside of the tertiary gear is an inner cage cavity, the constant velocity joint is a tripod constant velocity joint, and the tertiary gear is connected with the tripod constant velocity joint through the inner cage cavity to transmit torque to the hub through the half shaft.

5. The dual-motor transmission system for racing cars and electric cars of claim 1, wherein the two sides of the combined secondary reduction gearbox are provided with motor support frames, and the combined secondary reduction gearbox is connected with a car frame body.

6. The dual-motor transmission system for racing cars and electric cars of claim 1, wherein the flange plate of the output shaft of the motor is connected with the flange plate of the input gear shaft by an involute spline and is locked by a lock nut.

7. The dual motor transmission system for racing and electric vehicles of claim 1, wherein the secondary gear set comprises two gears coaxially disposed, one of which is adapted to engage with the input gear shaft and the other of which is adapted to engage with the tertiary gear.

8. The dual-motor transmission system for racing cars and electric cars as claimed in claim 1, wherein the outer sides of the left box body and the right box body are provided with a sealing end cover and a sealing rubber cover.

9. The dual-motor transmission system for racing cars and electric cars as claimed in claim 1, wherein said left and right cases are connected together by screws.

10. The dual motor drive system of claim 1, wherein the motor is an outer rotor and inner stator motor.