CN106763619A - Two shift transmission used for electric vehicle - Google Patents

Abstract

A kind of two shift transmission used for electric vehicle of the invention, is suitable for preposition forerunner or rearmounted engine rear-drive automobile, and two shift transmissions are located at the output end of motor；Two shift transmissions are triple axle structure, and it includes input axle assembly, countershaft assembly, output assembly and casing assembly；The input axle assembly, countershaft assembly, output assembly rotation centerline it is parallel, and the input axle assembly, countershaft assembly, output assembly be mounted be supported on casing assembly.Transmission efficiency of the present invention, simple structure, gearratio be easy to matching, manufacturing cost it is relatively low；Transmitting torque is big, gearshift control is accurate, reliability is high, it is ensured that the performance requirement such as shift process power is not interrupted, the shift process time is short, shift process smooth-going；Allow using more light-weighted motor, the cost of reduction motor；Motor and transmission system integrated form are designed, power drive system integrated cost is greatly reduced, it is stronger in the loading compatibility of different automobile types.

Description

Two-speed transmission for electric vehicles

technical field

This project involves a two-speed transmission for electric vehicles, which belongs to the field of automobile technology.

Background technique

With the increasingly serious environmental problems and the depletion of traditional fossil energy, the industry wave of developing electric vehicles has been set off worldwide. In my country's "13th Five-Year Plan", the construction of "Industry 4.0", and the realization of "Made in China 2025" and other national strategic plans, it is clear that electric vehicles are the main strategic orientation for the development of new energy vehicles and the transformation of the automobile industry in my country.

Transmission technology is the core technology of electric vehicles, which directly determines the power and economy of vehicles. At present, the electric vehicles on the market are mainly matched with single-speed reducers. Although they have the advantages of simple structure, small size, light weight, no need to change gears and no power interruption, etc., they have the following disadvantages:

1) Higher performance requirements for the drive motor. The characteristics of the drive motor are low-rotation constant torque and high-rotation constant power. In order to make the car have good climbing performance and acceleration performance, the transmission ratio of the single-speed reducer will be relatively large. The speed will be very high, and the wear and noise of the drive motor will be increased. Therefore, the driving motor is required to have good speed regulation performance and mechanical performance, which often increases the volume and manufacturing cost of the driving motor.

2) The efficiency is low. Because a single transmission ratio usually cannot take into account the power and economy of electric vehicles at the same time, the driving motor cannot be at a high-efficiency operating point in most cases during driving, especially at the highest or lowest speed and low load conditions, the efficiency of the driving motor will generally drop. Below 60-70%, serious waste of on-board electric energy reduces cruising range.

Due to the limitations of current battery technology, the range of electric vehicles is very limited. In order to enable electric vehicles to better exert their advantages and reduce the requirements for driving motors and batteries, the electric drive system of electric vehicles should adopt a multi-speed transmission. By manipulating the multi-speed transmission, it is ensured that the drive motor can work more in an ideal high-efficiency area, thereby improving the vehicle's power, economy and other indicators.

Compared with more gears or even continuously variable transmissions, two-speed transmissions have a simpler and more compact structure, higher power density, relatively mature technology, and lower manufacturing costs. At present, the mainstream two-speed transmissions for electric vehicles on the market are mainly mechanical transmissions. Because of the interruption of power during the shifting process, the long time for synchronizer shifting, and the prominent vibration and noise problems, the comfort and power of shifting are difficult. Poor, reducing the market competitiveness of electric vehicles. Therefore, the development of a two-speed transmission with uninterrupted shifting power, short shifting time, and low vibration and noise is of great market value.

Contents of the invention

The purpose of the present invention is to provide a two-speed transmission for electric vehicles to solve the problems of the existing single-speed reducer, such as high requirements on the drive motor and relatively low efficiency of the drive motor during driving, so as to increase the cruising range of the electric vehicle while ensuring The shifting power is uninterrupted, the shifting time is short, and the vibration and noise are small, which improves the power and economy of the vehicle, reduces costs, and promotes the industrialization of electric vehicles.

The present invention relates to a two-speed transmission for electric vehicles, suitable for front-drive or rear-drive vehicles, and the two-speed transmission (T) is located at the output end of a drive motor (E);

Their shape constructs are:

1. The drive motor (E) is an existing drive motor of an electric vehicle;

2. The two-speed transmission (T) is a three-shaft structure, which includes an input shaft assembly (I), an intermediate shaft assembly (M), an output assembly (O) and a box assembly (B); they The relationship between each other is: the rotation center lines of the input shaft assembly (I), the intermediate shaft assembly (M) and the output assembly (O) are parallel, and the input shaft assembly (I), the intermediate shaft assembly (M) and the output assembly (O) are installed and supported on the box assembly (B);

Their shape constructs are:

2.1 The box assembly (B) includes the first box (B1) and the second box (B2);

The relationship between them is:

2.1.1 The first box (B1) and the second box (B2) are arranged in order from the direction close to the drive motor (E) to the direction away from the drive motor (E);

2.1.2 The first box (B1) is fixedly connected or integrated with the output end of the drive motor (E);

2.1.3 The first box (B1) is fixedly connected to the second box (B2);

Their shape constructs are:

2.1.4 The first box (B1) and the second box (B2) are metal parts with complex structures;

2.2 The input shaft assembly (I) includes the input shaft (1), first gear driving gear (2), second gear driving gear (3), first gear clutch (C1), second gear clutch (C2), input shaft sealing ring (4), input shaft adjusting washer (5), first bearing (6), second bearing (7), third bearing (8), fourth bearing (9), fifth bearing (10), sixth Bearing (11), the seventh bearing (12), the eighth bearing (13), the ninth bearing (14);

The relationship between them is:

2.2.1 The input shaft (1), first gear driving gear (2), second gear driving gear (3), first gear clutch (C1), second gear clutch (C2), first bearing (6), second bearing (7), the third bearing (8), the fourth bearing (9), the fifth bearing (10), the sixth bearing (11), the seventh bearing (12), the eighth bearing (13), the ninth bearing ( 14) coincide with the rotation centerline of the driving motor (E);

2.2.2 The first gear clutch (C1), the first gear driving gear (2), the second gear driving gear (3), and the second gear clutch (C2) are sequentially from the direction close to the drive motor (E) to the direction away from the drive motor (E) arrangement;

2.2.3 The end of the input shaft (1) close to the drive motor (E) is installed and supported on the first box (B1) through the second bearing (7), and the end of the input shaft (1) away from the drive motor (E) Installed and supported on the second box body (B2) through the eighth bearing (13);

2.2.4 The input shaft (1) is fixedly connected to the output of the drive motor (E);

2.2.5 The first gear driving gear (2) is installed and supported on the input shaft (1) through the fourth bearing (9);

2.2.6 The second gear driving gear (3) is installed and supported on the input shaft (1) through the sixth bearing (11);

2.2.7 One end of the first gear clutch (C1) close to the drive motor (E) is installed and supported on the first box (B1) through the first bearing (6), and the first gear clutch (C1) is far away from the drive motor (E) One end is sleeved on the input shaft (1);

2.2.8 The end of the second gear clutch (C2) away from the drive motor (E) is installed and supported on the second box (B2) through the ninth bearing (14), and the second gear clutch (C2) is close to the drive motor (E) One end is sleeved on the input shaft (1);

2.2.9 The third bearing (8) is located between the first gear clutch (C1) and the first gear driving gear (2). The function of decoupling the speed of the clutch (C1) from the first gear driving gear (2);

2.2.10 The fifth bearing (10) is located between the first gear driving gear (2) and the second gear driving gear (3). The role of speed decoupling between the first gear driving gear (2) and the second gear driving gear (3);

2.2.11 The seventh bearing (12) is located between the second gear driving gear (3) and the second gear clutch (C2). The effect of decoupling the rotational speed of the driving gear (3) and the second gear clutch (C2);

2.2.12 The inner ring of the input shaft sealing ring (4) is installed and supported on the journal of the input shaft (1) near the drive motor (E), and the outer ring of the input shaft sealing ring (4) is installed and supported on the A box (B1) plays the role of sealing and isolating the inside of the two-speed transmission (T) from the external environment;

2.2.13 The input shaft adjusting gasket (5) is located between the first box (B1) and the first bearing (6) of the box assembly (B), and the input shaft adjusting gasket (5) is empty On the first box body (B1), it plays the role of adjusting the installation dimension chain of the input shaft assembly (I);

Their shape constructs are:

2.2.14 The input shaft (1) is a rotary structural member;

2.2.15 The driving gear (2) of the first gear is a cylindrical gear;

2.2.16 The second gear driving gear (3) is a cylindrical gear;

2.2.17 The input shaft seal ring (4) is a rotary seal;

2.2.18 The input shaft adjusting gasket (5) is a rotary structural part;

2.2.19 The first bearing (6), the second bearing (7), the third bearing (8), the fourth bearing (9), the fifth bearing (10), the sixth bearing (11), the seventh bearing ( 12), the eighth bearing (13), and the ninth bearing (14) are rolling bearing standard parts;

2.2.20 The first gear clutch (C1) is a multi-plate friction clutch, and the driving end of the first gear clutch (C1) includes the first gear outer hub support (15), the first gear outer hub (16), the first gear first Dual sheet (21), first block second dual sheet (23), first block third dual sheet (25), first block fourth dual sheet (27), first block fifth dual sheet (29), first block sixth The pair plate (31), the first gear outer hub retaining ring (32), the driven end of the first gear clutch (C1) includes the first gear friction plate (22), the first gear second friction plate (24), the first gear The third friction plate (26), the fourth friction plate of the first gear (28), the fifth friction plate of the first gear (30), the inner hub of the first gear (33), the execution end of the first gear clutch (C1) includes the first gear clutch Piston cavity (P1), first gear piston (17), first gear spring set (18), first gear spring set mounting seat (19), first gear outer hub support ring (20), the first gear clutch (C1) The executing end of the first gear clutch (C1) can selectively engage the driving end of the first gear clutch (C1) and the driven end of the first gear clutch (C1), and the input shaft (1) of the input shaft assembly (I) and the input shaft assembly ( 1) the first gear driving gear (2) is temporarily connected, thereby realizing the effect of transmitting torque;

The relationship between them is:

1) The end of the first gear outer hub support (15) close to the drive motor (E) is installed and supported on the first box (B1) through the first bearing (6) of the input shaft assembly (I), the first gear One end of the outer hub support (15) away from the drive motor (E) is fixedly connected with the input shaft (1) of the input shaft assembly (I);

2) The inner ring of the first gear outer hub (16) is installed and fixed on the first gear outer hub support (15);

3) The inner ring of the first gear inner hub (33) is installed and fixed on the first gear driving gear (2) of the input shaft assembly (1);

4) The first dual plate (21) of the first block, the first friction plate (22) of the first block, the second dual plate (23) of the first block, the second friction plate (24) of the first block, and the third dual plate (24) of the first block ( 25), the third friction plate (26) of one block, the fourth paired plate (27) of one block, the fourth friction plate (28) of one block, the fifth paired plate (29) of one block, the fifth friction plate (29) of one block ( 30), the sixth dual piece (31) of the first gear, and the outer hub ring (32) of the first gear are arranged sequentially from the direction close to the drive motor (E) to the direction away from the drive motor (E);

5) the outer ring of the first dual sheet (21) of the first block, the outer ring of the second dual sheet (23) of the first block, the outer ring of the third dual sheet (25) of the first block, the fourth dual sheet (27) of the first block ), the outer ring of the fifth dual sheet (29) of the first block, and the outer ring of the sixth dual sheet (31) of the first block are installed and fixed on the outer hub (16) of the first block;

6) The inner ring of the first friction plate (22) of the first gear, the inner ring of the second friction plate (24) of the first gear, the inner ring of the third friction plate (26) of the first gear, the fourth friction plate (28) of the first gear ) and the inner ring of the fifth friction plate (30) of the first block are installed and fixed on the inner hub (33) of the first block;

7) The outer ring of the first block outer hub retaining ring (32) is installed in the inner ring groove of the first block outer hub (16), which plays the role of axially limiting the sixth pair of pairs (31) of the first block;

8) The first gear piston (17), the first gear spring set (18), the first gear spring set mounting seat (19), and the first gear outer hub support retaining ring (20) move from close to the drive motor (E) to away from the drive motor (E) directions are arranged sequentially;

9) The inner ring of the first gear piston (17) is installed and supported on the first gear outer hub support (15);

10) The inner ring of the first gear spring group mounting seat (19) is installed and supported on the first gear outer hub support (15), and the outer ring of the first gear spring group mounting seat (19) is installed and supported on the first gear piston (17 )superior;

11) The end of the first stop spring group (18) close to the drive motor (E) is installed and supported on the first stop piston (17), and the end of the first stop spring group (18) away from the drive motor (E) is supported on the first stop spring group mounting base (19);

12) The inner ring of the retaining ring (20) of the first gear outer hub support (20) is installed in the outer ring groove of the first gear outer hub support (15) to limit the axial position of the first gear spring group mounting seat (19). role;

13) The first-gear clutch piston chamber (P1) is located between the first-gear outer hub support (15) and the first-gear piston (17), and the first-gear clutch piston chamber (P1) is filled with The hydraulic oil in the hydraulic system, the pressure formed by the first gear clutch piston chamber (P1) pushes the first gear piston (17) to overcome the spring force of the first gear spring group (18) to move away from the driving motor (E), so that the first gear Blocking piston (17) compresses the first pair of discs (21) of a block, the first friction plate of a block (22), the second pair of plates of a block (23), the second friction plate of a block (24), the first block of a block Three pairs of discs (25), the third friction plate of one block (26), the fourth pair of plates of one block (27), the fourth friction plate of one block (28), the fifth pair of plates of one block (29), the first block of one block The fifth friction plate (30) and the sixth dual plate (31) of the first gear play the role of engaging the driving end of the first gear clutch (C1) and the driven end of the first gear clutch (C1);

Their shape constructs are:

1) The first gear outer hub support (15) is a rotary structural part, and there is an outer ring groove at the end away from the drive motor (E);

2) The first gear outer hub (16) is a rotary structural member, and there is an inner ring groove at the end away from the driving motor (E);

3) The first gear piston (17) is a rotary structural member;

4) The first retaining spring group (18) is composed of a plurality of coil springs evenly arranged in the circumferential direction;

5) The mounting seat (19) of the first retaining spring group is a rotary structural member;

6) The retaining ring (20) of the first gear outer hub support is a rotary structural part;

7) The first paired sheet (21) of the first block, the second paired sheet (23) of one block, the third paired sheet (25) of one block, the fourth paired sheet (27) of one block, the fifth paired sheet (27) of one block ( 29), the sixth dual sheet (31) of the first block is a rotary structural member;

8) The first friction plate (22) of the first block, the second friction plate (24) of the first block, the third friction plate (26) of the first block, the fourth friction plate (28) of the first block; the fifth friction plate (28) of the first block ( 30) is a rotary structural part with a friction material on the surface;

9) The retaining ring (32) of the first gear outer hub support is a rotary structural member;

10) The inner hub (33) of the first block is a rotary structural member;

2.2.21 The second gear clutch (C2) is a multi-plate friction clutch, and the driving end of the second gear clutch (C2) includes the second gear outer hub support (34), the second gear outer hub (35), the second gear first Dual sheet (40), second block dual sheet (42), second block third dual sheet (44), second block fourth dual sheet (46), second block fifth dual sheet (48), second block sixth The dual plate (50), the second gear outer hub back ring (51), the driven end of the second gear clutch (C2) includes the second gear first friction plate (41), the second gear second friction plate (43), the second gear The third friction plate (45), the fourth friction plate of the second gear (47), the fifth friction plate of the second gear (49), the inner hub of the second gear (52), the execution end of the second gear clutch (C2) includes the second gear clutch Piston cavity (P2), second gear piston (36), second gear spring group (37), second gear spring group mounting seat (38), second gear outer hub support ring (39), the second gear clutch (C2) The executing end of the second gear clutch (C2) can selectively engage the driving end of the second gear clutch (C2) and the driven end of the second gear clutch (C2), and the input shaft (1) of the input shaft assembly (I) and the input shaft assembly ( 1) the second gear driving gear (3) is temporarily connected, thereby realizing the effect of transmitting torque;

The relationship between them is:

1) The end of the second gear outer hub support (34) away from the drive motor (E) is installed and supported on the second box of the box assembly (B) through the ninth bearing (14) of the input shaft assembly (I) (B2), the second gear outer hub support (34) is fixedly connected to the input shaft (1) of the input shaft assembly (I) near one end of the drive motor (E);

2) The inner ring of the second gear outer hub (35) is installed and fixed on the second gear outer hub support (34);

3) The inner ring of the second gear inner hub (52) is installed and fixed on the second gear driving gear (3) of the input shaft assembly (1);

4) The first dual plate of the second gear (40), the first friction plate of the second gear (41), the second dual plate of the second gear (42), the second friction plate of the second gear (43), the third dual plate of the second gear ( 44), the third friction plate of the second gear (45), the fourth dual plate of the second gear (46), the fourth friction plate of the second gear (47), the fifth dual plate of the second gear (48), the fifth friction plate of the second gear ( 49), the second gear and the sixth dual plate (50), the second gear outer hub retaining ring (51) are arranged in sequence from the direction away from the drive motor (E) to the direction close to the drive motor (E);

5) The outer ring of the first dual sheet (40) of the second block, the outer ring of the second dual sheet (42) of the second block, the outer ring of the third dual sheet (44) of the second block, the fourth dual sheet (46) of the second block ), the outer ring of the fifth dual sheet (48) of the second block, and the outer ring of the sixth dual sheet (50) of the second block are installed and fixed on the second block outer hub (35);

6) The inner ring of the first friction plate (41) of the second gear, the inner ring of the second friction plate (43) of the second gear, the inner ring of the third friction plate (45) of the second gear, the fourth friction plate (47) of the second gear ) and the inner ring of the fifth friction plate (49) of the second gear are installed and fixed on the inner hub (52) of the second gear;

7) The outer ring of the second gear outer hub retaining ring (51) is installed in the inner ring groove of the second gear outer hub (35), forming an axial limit effect on the second gear and the sixth pair piece (50);

8) The second gear piston (36), the second gear spring set (37), the second gear spring set mounting seat (38), the second gear outer hub support retaining ring (39) move from away from the drive motor (E) to close to the drive motor (E) directions are arranged sequentially;

9) The inner ring of the second gear piston (36) is installed and supported on the second gear outer hub support (34);

10) The inner ring of the second gear spring group mounting seat (38) is installed and supported on the second gear outer hub support (34), and the outer ring of the second gear spring group mounting seat (38) is installed and supported on the second gear piston (36 )superior;

11) The end of the second gear spring group (37) close to the drive motor (E) is supported on the second gear spring group mounting seat (38), and the end of the second gear spring group (37) away from the drive motor (E) is installed and supported on On the second gear piston (36);

12) The inner ring of the second gear outer hub support retaining ring (51) is installed in the outer ring groove of the second gear outer hub support (34), forming an axial limit for the second gear spring group mounting seat (38). effect;

13) The second gear clutch piston cavity (P2) is located between the second gear piston (36) and the second gear outer hub support (34), and the second gear clutch piston cavity (P2) is filled with The hydraulic oil in the hydraulic system, the pressure formed by the second gear clutch piston chamber (P2) pushes the second gear piston (36) to overcome the spring force of the second gear spring group (37) and move towards the direction close to the drive motor (E), so that the second gear Blocking piston (36) compresses the first dual plate (40) of the second gear, the first friction plate of the second gear (41), the second dual plate of the second gear (42), the second friction plate of the second gear (43), the second friction plate of the second gear The third dual plate (44), the third friction plate of the second gear (45), the fourth dual plate of the second gear (46), the fourth friction plate of the second gear (47), the fifth dual plate of the second gear (48), the second gear of the second gear The fifth friction plate (49) and the sixth dual plate (50) of the second gear form the effect of engaging the driving end of the second gear clutch (C2) and the driven end of the second gear clutch (C2);

Their shape constructs are:

1) The second gear outer hub support (34) is a rotary structural part, and there is an outer ring groove near the end of the drive motor (E);

2) The second gear outer hub (35) is a rotary structural part, and there is an inner ring groove near the end of the drive motor (E);

3) The second gear piston (36) is a rotary structural member;

4) The second gear spring group (37) is composed of a plurality of coil springs evenly arranged in the circumferential direction;

5) The mounting seat (38) of the second gear spring group is a rotary structural member;

6) The retaining ring (39) of the second gear outer hub support is a rotary structural part;

7) The first paired sheet (40) of the second block, the second paired sheet (42) of one block, the third paired sheet (44) of one block, the fourth paired sheet (46) of one block, the fifth paired sheet (46) of one block ( 48), the sixth dual sheet (50) of the first block is a rotary structural member;

8) The first friction plate of the second gear (41), the second friction plate of the second gear (43), the third friction plate of the second gear (45), the fourth friction plate of the second gear (47); the fifth friction plate of the second gear ( 49) is a rotary structural part, and the surface is a friction material;

9) The retaining ring (51) of the second gear outer hub support is a rotary structural part;

10) The second gear inner hub (52) is a rotary structural member;

2.3 The intermediate shaft assembly (M) includes the intermediate shaft (53), the first gear driven gear (54), the second gear driven gear (55), the main reducer driving gear (56), the tenth bearing (57), Eleventh bearing (58), intermediate shaft adjusting gasket (59);

The relationship between them is:

2.3.1 The intermediate shaft (53), first gear driven gear (54), second gear driven gear (55), main reducer driving gear (56), tenth bearing (57), eleventh bearing (58 ) coincides with the centerlines of rotation;

2.3.2 The tenth bearing (57), the main reducer driving gear (56), the first gear driven gear (54), the second gear driven gear (55), and the eleventh bearing (58) are on the intermediate shaft (53 ) are arranged sequentially from the direction close to the drive motor (E) to the direction away from the drive motor (E);

2.3.3 The first gear driven gear (54) is fixedly connected with the intermediate shaft (53);

2.3.4 The second gear driven gear (55) is fixedly connected with the intermediate shaft (53);

2.3.5 The driving gear (56) of the main reducer is fixedly connected or integrated with the intermediate shaft (53);

2.3.6 The inner ring of the tenth bearing (57) is installed on the journal on the side of the intermediate shaft (53) close to the drive motor (E), and the outer ring of the tenth bearing (57) is installed on the first box ( On B1), the inner ring of the eleventh bearing (58) is installed on the journal on the side of the intermediate shaft (53) away from the drive motor (E), and the outer ring of the tenth bearing (58) is installed on the second box body (B2);

2.3.7 The intermediate shaft adjusting gasket (59) is located between the eleventh bearing (58) and the second box (B2), and the outer ring of the intermediate shaft adjusting gasket (59) is installed and supported on the second box On the body (B2), it plays the role of adjusting the installation dimension chain of the intermediate shaft assembly (M);

Their shape constructs are:

2.3.8 The intermediate shaft (53) is a rotary structural member;

2.3.9 The first gear driven gear (54) is a cylindrical gear;

2.3.10 The second gear driven gear (55) is a cylindrical gear;

2.3.11 The driving gear (56) of the main reducer is a cylindrical gear;

2.3.12 The tenth bearing (57) and the eleventh bearing (58) are standard rolling bearings;

2.3.13 The intermediate shaft adjusting gasket (59) is a rotary structural part;

2.4 The output assembly (O) includes the final drive driven gear (60), the differential assembly (61), the twelfth bearing (62), the thirteenth bearing (63), the output shaft adjusting gasket ( 64), the first sealing ring of the output shaft (65), the second sealing ring of the output shaft (66), the first half shaft (67), the second half shaft (68);

The relationship between them is:

2.4.1 The main reducer driven gear (60), differential assembly (61), twelfth bearing (62), thirteenth bearing (63), first half shaft (67), second half shaft The centerlines of rotation of the shaft (68) coincide;

2.4.2 The first half shaft (67), the first sealing ring of the output shaft (65), the output shaft adjusting gasket (64), the twelfth bearing (62), the differential assembly (61), the main reducer The driven gear (60), the thirteenth bearing (63), the second sealing ring of the output shaft (66), and the second half-shaft (68) are in sequence from the direction close to the drive motor (E) to the direction away from the drive motor (E) arrangement;

2.4.3 The driven gear (60) of the main reducer is fixedly connected with the differential assembly (61);

2.4.4 The inner ring of the twelfth bearing (62) is installed and supported on the journal of the differential assembly (61) near the drive motor (E), and the outer ring of the twelfth bearing (62) is installed Supported on the first box (B1), the inner ring of the thirteenth bearing (63) is installed and supported on the journal of the differential assembly (61) away from the drive motor (E), the thirteenth The outer ring of the bearing (63) is installed and supported on the second box body (B2);

2.4.5 The end of the first half shaft (67) away from the drive motor (E) is fixedly connected to the differential assembly (61);

2.4.6 One end of the second half shaft (68) close to the drive motor (E) is fixedly connected to the differential assembly (61);

2.4.7 The output shaft adjusting gasket (64) is located between the first box (B1) and the twelfth bearing (62), and the outer ring of the output shaft adjusting gasket (64) is installed and supported on the first box (B1), it plays the role of adjusting the installation size chain of the output assembly (O);

2.4.8 The inner ring of the first sealing ring (65) of the output shaft is installed and supported on the first half shaft (67), and the outer ring of the first sealing ring (65) of the output shaft is installed and supported on the first box body (B1 ), which plays the role of sealing and isolating the inside of the two-speed transmission (T) from the external environment;

2.4.9 The inner ring of the second sealing ring (66) of the output shaft is installed and supported on the second half shaft (68), and the outer ring of the second sealing ring (66) of the output shaft is installed and supported on the second box body (B2 ) to play the role of sealing and isolating the inside of the two-speed transmission (T) from the external environment.

Their shape constructs are:

2.4.10 The driven gear (60) of the main reducer is a cylindrical gear;

2.4.11 The differential gear assembly (61) is an existing product for general automobiles;

2.4.12 The twelfth bearing (62) and the thirteenth bearing (63) are standard rolling bearings;

2.4.13 The output shaft adjusting gasket (64) is a rotary structural part;

2.4.14 The first seal ring (65) of the output shaft and the second seal ring (66) of the output shaft are rotary seals;

2.4.15 The first half shaft (67) and the second half shaft (68) are existing products for general automobiles;

The transmission scheme involved in the present invention generates two gears of the first gear and the second gear by controlling the engagement or separation of the first gear clutch (C1) and the second gear clutch (C2); the working principle of the present invention is briefly as follows:

1. When the first gear clutch (C1) is disengaged and the second gear clutch (C2) is disengaged, the electric vehicle is in neutral, and the power cannot be transmitted from the drive motor (E) to the first half shaft (67) and the second half shaft (68);

2. When the first-gear clutch (C1) is engaged and the second-gear clutch (C2) is disengaged, the electric vehicle is in the first gear, and the power is from the drive motor (E) through the input shaft (1), the first-gear clutch (C1), First gear driving gear (2), first gear driven gear (54), intermediate shaft (53), final drive gear (56), final drive driven gear (60), differential assembly (61) It is transmitted to the first half shaft (67) and the second half shaft (68); the ratio of the speed of the input shaft (1) to the speed of the driven gear (60) of the final drive is the transmission ratio of the first gear;

3. When the first gear clutch (C1) is separated and the second gear clutch (C2) is combined, the electric vehicle is in the second gear, and the power is from the drive motor (E) through the input shaft (1), the second gear clutch (C2), Second gear driving gear (3), second gear driven gear (55), intermediate shaft (53), main reducer driving gear (56), final drive driven gear (60), differential assembly (61) It is transmitted to the first half shaft (67) and the second half shaft (68); the ratio of the speed of the input shaft (1) to the speed of the driven gear (60) of the final drive is the transmission ratio of the second gear;

4. Wherein, when the driving motor (E) rotates forward, the first gear and the second gear are the forward first gear and the forward second gear; when the driving motor (E) rotates in the reverse direction, the first gear and the second gear are Reverse first gear and reverse second gear. The transmission ratios of the first forward gear and the first reverse gear are the same; the transmission ratios of the second forward gear and the second reverse gear are the same.

A two-speed transmission for electric vehicles of the present invention has the following advantages and effects:

1. The invention adopts a fixed-axis gear transmission scheme, which has high transmission efficiency, simple structure, easy matching of transmission ratio, and low manufacturing cost;

2. The present invention adopts two multi-disc friction clutches for gear shifting, with large transmission torque, precise gear shifting control, and high reliability, which can ensure uninterrupted power during the shifting process, short shifting time, and smooth shifting process and other performance requirements;

3. The present invention adopts two-speed variable speed, expands the range of the transmission ratio, can greatly reduce the performance requirements for the drive motor, allows the use of a more lightweight drive motor, thereby reducing the production cost of the drive motor, and simultaneously because the drive motor can be more Working in the high-efficiency range in many places, on the premise of ensuring the power of the vehicle, it increases the economy of the vehicle and further reduces the total cost of electric vehicles;

4. The present invention integrates the driving motor and the transmission system, which not only fully optimizes the performance of the electric drive system, improves the driving efficiency, but also greatly reduces the overall cost of the electric drive system, making it more compatible with different vehicle types. , conducive to the industrialization and marketization of electric vehicles.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the present invention.

Fig. 2 is a structural schematic diagram of the present invention.

Fig. 3 is a partial enlarged view of the structure of the input shaft assembly I.

Fig. 4 is a partially enlarged view of the structure of a wet clutch C1.

Fig. 5 is a partially enlarged view of the structure of the second gear wet clutch C2.

Fig. 6 is a power transmission route diagram of first-gear driving.

Fig. 7 is a power transmission route diagram of the second gear drive.

The serial numbers, symbols, codes and units in the figure are explained as follows:

1 Input shaft; 2 First gear driving gear; 3 Second gear driving gear; 4 Input shaft sealing ring;

5 input shaft adjusting gasket; 6 first bearing; 7 second bearing; 8 third bearing;

9 the fourth bearing; 10 the fifth bearing; 11 the sixth bearing; 12 the seventh bearing;

13 the eighth bearing; 14 the ninth bearing; 15 the outer hub support of the first gear; 16 the outer hub of the first gear;

17 first gear piston; 18 first gear spring group; 19 first gear spring group mounting seat; 20 first gear outer hub support retaining ring;

21 one blocks the first dual plate; 22 one blocks the first friction plate; 23 one blocks the second dual plate; 24 one blocks the second friction plate;

25 is the third dual plate; 26 is the third friction plate; 27 is the fourth dual plate; 28 is the fourth friction plate;

29 is the fifth dual plate for one block; 30 is the fifth friction plate for one block; 31 is the sixth dual plate for one block; 32 is for the outer hub retaining ring;

33 first gear inner hub; 34 second gear outer hub support; 35 second gear outer hub; 36 second gear piston;

37 second gear return spring group; 38 second gear spring group mounting seat; 39 second gear outer hub support retaining ring; 40 second gear first dual piece;

41 the first friction plate of the second gear; 42 the second dual plate of the second gear; 43 the second friction plate of the second gear; 44 the third dual plate of the second gear;

45 The third friction plate of the second gear; 46 The fourth dual plate of the second gear; 47 The fourth friction plate of the second gear; 48 The fifth dual plate of the second gear;

49 second gear fifth friction plate; 50 second gear sixth dual plate; 51 second gear outer hub retaining ring; 52 second gear inner hub;

53 intermediate shaft; 54 first gear driven gear; 55 second gear driven gear; 56 main reducer driving gear;

57 the tenth bearing; 58 the eleventh bearing; 59 the intermediate shaft adjusting gasket; 60 the driven gear of the main reducer;

61 differential gear assembly; 62 twelfth bearing; 63 thirteenth bearing; 64 output shaft adjusting gasket;

65 output shaft first seal ring; 66 output shaft second seal ring; 67 first half shaft; 68 second half shaft;

B box assembly; B1 first box; B2 second box; C1 first gear clutch;

C2 second gear clutch; E drive motor; T two gear transmission; I input shaft assembly;

M intermediate shaft assembly; O output assembly; P1 first gear clutch piston cavity; P2 second gear clutch piston cavity.

detailed description

Referring to the accompanying drawings, the present invention is further described.

Referring to Figures 1, 2, 3, 4, 5, 6, and 7, the present invention is a two-speed transmission for electric vehicles, suitable for front-drive or rear-drive vehicles, and the two-speed transmission T is located at the drive motor E the output terminal;

Their shape constructs are:

1. The drive motor E is a permanent magnet synchronous drive motor for electric vehicles;

2. The two-speed transmission T is a three-shaft structure, which includes an input shaft assembly I, an intermediate shaft assembly M, an output assembly O, and a box assembly B; the relationship between them is: the input shaft The rotation centers of the assembly I, the intermediate shaft assembly M, and the output assembly O are parallel, and the input shaft assembly I, the intermediate shaft assembly M, and the output assembly O are all installed and supported on the box assembly B;

Their shape constructs are:

2.1 The box assembly B includes the first box B1 and the second box B2;

The relationship between them is:

2.1.5 The first box B1 and the second box B2 are arranged in order from the direction close to the drive motor E to the direction away from the drive motor E;

2.1.6 The first box B1 is fixedly connected to the output end of the driving motor E through several bolts;

2.1.7 The first box B1 and the second box B2 are fixedly connected by several bolts;

Their shape constructs are:

2.1.8 The first box B1 and the second box B2 are aluminum alloy castings with complex structures;

2.2 The input shaft assembly I includes input shaft 1, first gear driving gear 2, second gear driving gear 3, first gear clutch C1, second gear clutch C2, input shaft sealing ring 4, input shaft adjusting gasket 5, first bearing 6. Second bearing 7, third bearing 8, fourth bearing 9, fifth bearing 10, sixth bearing 11, seventh bearing 12, eighth bearing 13, ninth bearing 14;

The relationship between them is:

2.2.1 The input shaft 1, first gear driving gear 2, second gear driving gear 3, first gear clutch C1, second gear clutch C2, first bearing 6, second bearing 7, third bearing 8, fourth bearing 9, The fifth bearing 10, the sixth bearing 11, the seventh bearing 12, the eighth bearing 13, and the ninth bearing 14 coincide with the rotation center line of the drive motor E;

2.2.2 The first gear clutch C1, the first gear driving gear 2, the second gear driving gear 3, and the second gear clutch C2 are arranged sequentially from the direction close to the drive motor E to the direction away from the drive motor E;

2.2.3 The end of the input shaft 1 close to the drive motor E is installed and supported on the first box body B1 through the second bearing 7, and the end of the input shaft 1 away from the drive motor E is installed and supported on the second box body through the eighth bearing 13 on B2;

2.2.4 The input shaft 1 is connected to the output of the drive motor E through a spline;

2.2.5 The first gear driving gear 2 is installed and supported on the input shaft 1 through the fourth bearing 9;

2.2.6 The second gear driving gear 3 is installed and supported on the input shaft 1 through the sixth bearing 11;

2.2.7 The end of the first gear clutch C1 close to the drive motor E is installed and supported on the first box B1 through the first bearing 6, and the end of the first gear clutch C1 away from the drive motor E is sleeved on the input shaft 1 through a spline connection ;

2.2.8 The end of the second gear clutch C2 away from the drive motor E is installed and supported on the second box B2 through the ninth bearing 14, and the end of the second gear clutch C2 close to the drive motor E is sleeved on the input shaft 1 through a spline connection ;

2.2.9 The third bearing 8 is located between the first gear clutch C1 and the first gear driving gear 2, and the third bearing 8 is vacantly sleeved on the input shaft 1, so as to separate the speed of the first gear clutch C1 from the first gear driving gear 2. The role of coupling;

2.2.10 The fifth bearing 10 is located between the driving gear 2 of the first gear and the driving gear 3 of the second gear. The role of speed decoupling;

2.2.11 The seventh bearing 12 is located between the second-gear driving gear 3 and the second-gear clutch C2, and the seventh bearing 12 is vacantly sleeved on the input shaft 1 to resolve the rotation speed of the second-gear driving gear 3 and the second-gear clutch C2. The role of coupling;

2.2.12 The inner ring of the input shaft sealing ring 4 is installed and supported on the journal of the input shaft 1 near the side of the drive motor E, and the outer ring of the input shaft sealing ring 4 is installed and supported on the first box B1 to play The function of sealing and isolating the interior of the two-speed transmission T from the external environment;

2.2.13 The input shaft adjusting gasket 5 is located between the first box B1 and the first bearing 6, and the input shaft adjusting gasket 5 is emptied on the first box B1 to adjust the installation of the input shaft assembly I. The role of the dimensional chain;

Their shape constructs are:

2.2.14 The input shaft 1 is a solid shaft made of alloy steel;

2.2.15 The driving gear 2 of the first gear is an involute helical cylindrical gear made of alloy steel;

2.2.16 The second gear driving gear 3 is an involute helical cylindrical gear made of alloy steel;

2.2.17 The input shaft sealing ring 4 is a metal skeleton sealing ring made of rubber material;

2.2.18 The input shaft adjustment gasket 5 is a punched piece of iron material;

2.2.19 The first bearing 6 and the ninth bearing 14 are deep groove ball bearings;

2.2.20 The second bearing 7, the fourth bearing 9, the sixth bearing 11, and the eighth bearing 13 are radial needle bearings;

2.2.21 The third bearing 8, the fifth bearing 10, and the seventh bearing 12 are thrust cylindrical roller bearings;

2.2.22 The first-gear clutch C1 is a multi-plate wet friction clutch, and the driving end of the first-gear clutch C1 includes the first-gear outer hub support 15, the first-gear outer hub 16, the first dual disc 21 of the first gear, and the second gear of the first gear. Two pairs of plates 23, the third pair of plates 25 of one block, the fourth pair of plates of one block 27, the fifth pair of plates 29 of one block, the sixth pair of plates 31 of one block, the outer hub retaining ring 32 of one block, the clutch C2 of one block The driven end of the first block includes a first friction plate 22, a second friction plate 24, a third friction plate 26, a fourth friction plate 28, a fifth friction plate 30, and an inner hub 33 , the execution end of the first-gear clutch C1 includes the first-gear clutch piston chamber P1, the first-gear piston 17, the first-gear spring group 18, the first-gear spring group mounting seat 19, the first-gear outer hub support ring 20, the first-gear clutch The executing end of C1 can selectively engage the driving end of the first-gear clutch C1 and the driven end of the first-gear clutch C1, and temporarily connect the input shaft 1 of the input shaft assembly I and the first-gear driving gear 2 of the input shaft assembly I. Connected to realize the function of transmitting torque; the relationship between them is:

1) The end of the first gear outer hub support 15 close to the drive motor E is installed and supported on the first box body B1 of the box assembly B through the first bearing 6 of the input shaft assembly I, and the first gear outer hub support 15 The end away from the drive motor E is splined to the input shaft 1 of the input shaft assembly I;

2) The inner ring of the first gear outer hub 16 is welded and fixed on the first gear outer hub support 15;

3) The inner ring of the first gear inner hub 33 is welded and fixed on the first gear driving gear 2 of the input shaft assembly 1;

4) The first dual plate 21 of the first block, the first friction plate 22 of the first block, the second dual plate 23 of the first block, the second friction plate 24 of the first block, the third dual plate 25 of the first block, and the third friction plate 26 of the first block , the fourth dual sheet 27 of the first block, the fourth friction sheet 28 of the first block, the fifth dual sheet 29 of the first block, the fifth friction sheet 30 of the first block, the sixth dual sheet 31 of the first block, and the outer hub retaining ring 32 of the first block from approaching The drive motor E is arranged sequentially in a direction away from the drive motor E;

5) the outer ring of the first dual sheet 21 of the first block, the outer ring of the second dual sheet 23 of the first block, the outer ring of the third dual sheet 25 of the first block, the outer ring of the fourth dual sheet 27 of the first block, and the second dual sheet 27 of the first block. The outer ring of the fifth dual sheet 29 and the outer ring of the sixth dual sheet 31 of the first block are installed on the outer hub 16 of the first block through spline connection;

6) The inner ring of the first friction plate 22 of the first gear, the inner ring of the second friction plate 24 of the first gear, the inner ring of the third friction plate 26 of the first gear, the inner ring of the fourth friction plate 28 of the first gear, and the second friction plate 28 of the first gear. The inner ring of the fifth friction plate 30 is installed on the inner hub 33 of the first gear through a spline connection;

7) The outer ring of the first block outer hub retaining ring 32 is installed in the inner ring groove of the first block outer hub 16 to form an axial position limiting effect on the sixth pair piece 31 of the first block;

8) The first gear piston 17, the first gear spring group 18, the first gear spring group mounting seat 19, and the first gear outer hub support retaining ring 20 are arranged sequentially from the direction close to the drive motor E to the direction away from the drive motor E;

9) The inner ring of the first gear piston 17 is installed and supported on the first gear outer hub support 15;

10) The inner ring of the first block spring group mounting seat 19 is installed and supported on the first block outer hub support 15, and the outer ring of the first block spring group mounting seat 19 is installed and supported on the first block piston 17;

11) The end of the first stop spring group 18 close to the driving motor E is installed and supported on the first stop piston 17, and the end of the first stop spring group 18 away from the drive motor E is supported on the first stop spring group mounting seat 19;

12) The inner ring of the retaining ring 20 of the first gear outer hub bearing is installed in the outer ring groove of the first gear outer hub bearing 15, which plays the role of axially limiting the first gear spring group mounting seat 19;

13) The first-gear clutch piston chamber P1 is located between the first-gear outer hub support 15 and the first-gear piston 17, and the first-gear clutch piston chamber P1 is filled with hydraulic oil from the hydraulic system of the two-gear transmission T. The pressure formed by the clutch piston chamber P1 pushes the first-gear piston 17 to overcome the spring force of the first-gear spring group 18 to move away from the driving motor E, so that the first-gear piston 17 presses the first-gear first pair plate 21 and the first-gear first friction Plate 22, the second dual plate 23 of one block, the second friction plate 24 of one block, the third dual plate 25 of one block, the third friction plate 26 of one block, the fourth dual plate 27 of one block, and the fourth friction plate 28 of one block , the fifth dual plate 29 of the first gear, the fifth friction plate 30 of the first gear, and the sixth dual plate 31 of the first gear play the role of engaging the driving end of the first gear clutch C1 and the driven end of the first gear clutch C1;

Their shape constructs are:

1) The first gear outer hub support 15 is a casting of alloy steel material, and there is an outer ring groove away from the E end of the drive motor;

2) The first gear outer hub 16 is a stamped part made of alloy steel, and there is an inner ring groove far away from the E end of the driving motor;

3) The first gear piston 17 is a stamped part made of alloy steel;

4) The first retaining spring group 18 is composed of a plurality of helical springs of spring steel materials evenly arranged in the circumferential direction;

5) The mounting seat 19 of the first retaining spring group is a casting of aluminum alloy material;

6) The retaining ring 20 of the outer hub support of the first gear is a circlip made of alloy steel;

7) The first dual sheet 21 of this one block, the second dual sheet 23 of one block, the third dual sheet 25 of one block, the fourth dual sheet 27 of one block, the fifth dual sheet 29 of one block, and the sixth dual sheet 31 of one block Punched parts made of alloy steel;

8) The first friction plate 22 of the first gear, the second friction plate 24 of the first gear, the third friction plate 26 of the first gear, the fourth friction plate 28 of the first gear, and the fifth friction plate 30 of the first gear are punched parts, and the inside is an alloy Steel material, the surface is paper-based friction material;

9) The retaining ring 32 of the outer hub support of the first gear is a circlip made of alloy steel;

10) The inner hub 33 of the first block is a stamping part made of alloy steel;

2.2.23 The second gear clutch C2 is a multi-disc friction clutch. The driving end of the second gear clutch C2 includes the second gear outer hub support 34, the second gear outer hub 35, the second gear first dual plate 40, the second gear second gear Dual plate 42, the third dual plate 44 of the second gear, the fourth dual plate 46 of the second gear, the fifth dual plate 48 of the second gear, the sixth dual plate 50 of the second gear, the outer hub retaining ring 51 of the second gear, the second gear clutch C2 The driven end includes the first friction plate 41 for the second gear, the second friction plate 43 for the second gear, the third friction plate 45 for the second gear, the fourth friction plate 47 for the second gear, the fifth friction plate 49 for the second gear, and the inner hub 52 for the second gear. The execution end of the second gear clutch C1 includes the second gear clutch piston cavity P1, the second gear piston 36, the second gear spring group 37, the second gear spring group mounting seat 38, and the second gear outer hub support ring 39. The second gear clutch C2 The executing end of the second gear clutch C2 can selectively engage the driving end of the second gear clutch C2 and the driven end of the second gear clutch C2, and temporarily connect the input shaft 1 of the input shaft assembly I with the second gear driving gear 3 of the input shaft assembly I Up, so as to realize the function of transmitting torque;

The relationship between them is:

1) The end of the second-speed outer hub support 34 away from the drive motor E is installed and supported on the second box body B2 of the box assembly B through the ninth bearing 14 of the input shaft assembly I, and the second-speed outer hub support 34 One end close to the drive motor E is splined to the input shaft 1 of the input shaft assembly I;

2) The inner ring of the second gear outer hub 35 is welded and installed on the second gear outer hub support 34;

3) The inner ring of the second gear inner hub 52 is welded and installed on the second gear driving gear 3 of the input shaft assembly 1;

4) The first dual plate 40 of the second gear, the first friction plate 41 of the second gear, the second dual plate 42 of the second gear, the second friction plate 43 of the second gear, the third dual plate 44 of the second gear, and the third friction plate 45 of the second gear , the fourth dual plate 46 of the second gear, the fourth friction plate 47 of the second gear, the fifth dual plate 48 of the second gear, the fifth friction plate 49 of the second gear, the sixth dual plate 50 of the second gear, and the outer hub retaining ring 51 of the second gear The drive motor E is arranged sequentially in the direction close to the drive motor E;

5) The outer ring of the first dual sheet 40 of the second block, the outer ring of the second dual sheet 42 of the second block, the outer ring of the third dual sheet 44 of the second block, the outer ring of the fourth dual sheet 46 of the second block, the second dual sheet of the second block The outer ring of the fifth dual sheet 48 and the outer ring of the sixth dual sheet 50 of the second block are installed on the second block outer hub 35 through a spline connection;

6) The inner ring of the first friction plate 41 of the second gear, the inner ring of the second friction plate 43 of the second gear, the inner ring of the third friction plate 45 of the second gear, the inner ring of the fourth friction plate 47 of the second gear, the second friction plate of the second gear The inner ring of the fifth friction plate 49 is installed on the second gear inner hub 52 through a spline connection;

7) The outer ring of the second gear outer hub retaining ring 51 is installed in the inner ring groove of the second gear outer hub 35 to form an axial limit effect on the second gear and the sixth pair piece 50;

8) The second gear piston 36, the second gear spring group 37, the second gear spring group mounting seat 38, and the second gear outer hub support retaining ring 39 are arranged sequentially from the direction away from the drive motor E to the direction close to the drive motor E;

9) The inner ring of the second gear piston 36 is installed and supported on the second gear outer hub support 34;

10) The inner ring of the second gear spring group mounting seat 38 is installed and supported on the second gear outer hub support 34, and the outer ring of the second gear spring group mounting seat 38 is installed and supported on the second gear piston 36;

11) The end of the second gear spring group 37 close to the driving motor E is supported on the second gear spring group mounting seat 38, and the end of the second gear spring group 37 away from the driving motor E is installed and supported on the second gear piston 36;

12) The inner ring of the second gear outer hub support ring 51 is installed in the outer ring groove of the second gear outer hub support 34, and plays the role of axially limiting the second gear spring group mounting seat 38;

13) The second gear clutch piston cavity P2 is located between the second gear piston 36 and the second gear outer hub support 34, the second gear clutch piston cavity P2 is filled with hydraulic oil from the hydraulic system of the two gear transmission T, the second gear The pressure formed by the clutch piston cavity P2 pushes the second-gear piston 36 to overcome the spring force of the second-gear spring group 37 and move toward the direction close to the drive motor E, so that the second-gear piston 36 presses the second-gear first pair plate 40 and the second-gear first friction Plate 41, second gear second dual plate 42, second gear second friction plate 43, second gear third dual plate 44, second gear third friction plate 45, second gear fourth dual plate 46, second gear fourth friction plate 47 , the fifth pair plate 48 of the second gear, the fifth friction plate 49 of the second gear, and the sixth pair plate 50 of the second gear play the role of engaging the driving end of the second gear clutch C2 and the driven end of the second gear clutch C2;

Their shape constructs are:

1) The second gear outer hub support 34 is a casting of alloy steel material, and there is an outer ring groove near the E end of the drive motor;

2) The second gear outer hub 35 is a stamped part of alloy steel material, and there is an inner ring groove near the E end of the drive motor;

3) The second gear piston 36 is a stamped part made of alloy steel;

4) The second gear spring group 37 is composed of a plurality of helical springs of spring steel materials uniformly arranged in the circumferential direction;

5) The mounting seat 38 of the second gear spring group is a casting of aluminum alloy material;

6) The retaining ring 39 of the second gear outer hub support is a snap spring made of alloy steel;

7) The first dual sheet 40 of the second block, the second dual sheet 42 of one block, the third dual sheet 44 of one block, the fourth dual sheet 46 of one block, the fifth dual sheet 48 of one block, and the sixth dual sheet 50 of one block Punched parts made of alloy steel;

8) The first friction plate 41 of the second gear, the second friction plate 43 of the second gear, the third friction plate 45 of the second gear, the fourth friction plate 47 of the second gear; the fifth friction plate 49 of the second gear is a blanking part, and the inside is an alloy Steel material, the surface is paper-based friction material;

9) The retaining ring 51 of the second gear outer hub support is a circlip made of alloy steel;

10) The second gear inner hub 52 is a stamped part made of alloy steel;

2.3 The intermediate shaft assembly M includes the intermediate shaft 53, the first gear driven gear 54, the second gear driven gear 55, the driving gear of the main reducer

Wheel 56, tenth bearing 57, eleventh bearing 58, intermediate shaft adjusting gasket 59;

The relationship between them is:

2.3.1 The rotation centerlines of the intermediate shaft 53, the first gear driven gear 54, the second gear driven gear 55, the driving gear 56 of the main reducer, the tenth bearing 57, and the eleventh bearing 58 coincide;

2.3.2 The tenth bearing 57, the main reducer driving gear 56, the first gear driven gear 54, the second gear driven gear 55, and the eleventh bearing 58 are on the intermediate shaft 53 from close to the drive motor E to away from the drive motor E The directions are arranged sequentially;

2.3.3 The first gear driven gear 54 is connected to the intermediate shaft 53 through a spline;

2.3.4 The second gear driven gear 55 is connected to the intermediate shaft 53 through a spline;

2.3.5 The drive gear 56 of the main reducer is integrated with the intermediate shaft 53;

2.3.6 The inner ring of the tenth bearing 57 is installed on the journal on the side of the intermediate shaft 53 close to the drive motor E, the outer ring of the tenth bearing 57 is installed on the first box B1, and the eleventh bearing 58 The inner ring of the tenth bearing 58 is installed on the journal on the side of the intermediate shaft 53 away from the drive motor E, and the outer ring of the tenth bearing 58 is installed on the second box B2;

2.3.7 The intermediate shaft adjusting washer 59 is located between the eleventh bearing 58 and the second box body B2, and the outer ring of the intermediate shaft adjusting washer 59 is installed and supported on the second box body B2 to adjust the middle The role of the shaft assembly M installation size chain;

Their shape constructs are:

2.3.8 The intermediate shaft 53 is a hollow shaft made of alloy steel;

2.3.9 The first gear driven gear 54 is an involute helical cylindrical gear made of alloy steel;

2.3.10 The second gear driven gear 55 is an involute helical cylindrical gear made of alloy steel;

2.3.11 The driving gear 56 of the main reducer is an involute helical cylindrical gear made of alloy steel;

2.3.12 The tenth bearing 57 and the eleventh bearing 58 are tapered roller bearings;

2.3.13 The intermediate shaft adjusting gasket 59 is a punched piece of iron material;

2.4 The output assembly O includes the driven gear 60 of the main reducer, the differential assembly 61, the twelfth bearing 62, the thirteenth bearing 63, the output shaft adjusting gasket 64, the first sealing ring 65 of the output shaft, the output Shaft second sealing ring 66, first half shaft 67, second half shaft 68;

The relationship between them is:

2.4.1 The centerlines of the driven gear 60 of the main reducer, the differential assembly 61, the twelfth bearing 62, the thirteenth bearing 63, the first half shaft 67, and the second half shaft 68 coincide;

2.4.2 The first half shaft 67, the first sealing ring 65 of the output shaft, the output shaft adjusting gasket 64, the twelfth bearing 62, the differential assembly 61, the driven gear 60 of the main reducer, and the thirteenth bearing 63. The second sealing ring 66 of the output shaft and the second semi-shaft 68 are arranged sequentially from the direction close to the drive motor E to the direction away from the drive motor E;

2.4.3 The driven gear 60 of the main reducer is fixedly connected with the differential assembly 61 through several bolts;

2.4.4 The inner ring of the twelfth bearing 62 is installed and supported on the journal of the differential assembly 61 near the drive motor E, and the outer ring of the twelfth bearing 62 is installed and supported on the first box B1 , the inner ring of the thirteenth bearing 63 is installed and supported on the journal of the side of the differential assembly 61 away from the drive motor E, and the outer ring of the thirteenth bearing 63 is installed and supported on the second box B2;

2.4.5 The end of the first half shaft 67 away from the drive motor E is connected to the differential assembly 61 through a spline;

2.4.6 The end of the second half shaft 68 close to the drive motor E is connected to the differential assembly 61 through a spline;

2.4.7 The output shaft adjusting gasket 64 is located between the first box B1 and the twelfth bearing 62, and the outer ring of the output shaft adjusting gasket 64 is installed and supported on the first box B1 to adjust the overall output. The role of O installation size chain;

2.4.8 The inner ring of the first sealing ring 65 of the output shaft is installed and supported on the first semi-shaft 67, and the outer ring of the first sealing ring 65 of the output shaft is installed and supported on the first box B1, so as to connect the two gears The function of sealing and isolating the interior of the transmission T from the external environment;

2.4.9 The inner ring of the second sealing ring 66 of the output shaft is installed and supported on the second semi-shaft 68, and the outer ring of the second sealing ring 66 of the output shaft is installed and supported on the second box body B2, so as to connect the two gears The function of sealing and isolating the interior of the transmission T from the external environment;

Their shape constructs are:

2.4.10 The driven gear 60 of the main reducer is an involute helical cylindrical gear made of alloy steel;

2.4.11 The differential assembly 61 is a differential for electric vehicles;

2.4.12 The twelfth bearing 62 and the thirteenth bearing 63 are tapered roller bearings;

2.4.13 The output shaft adjusting gasket 64 is a blanking piece of iron material;

2.4.14 The first sealing ring 65 of the output shaft and the second sealing ring 66 of the output shaft are metal skeleton sealing rings made of rubber materials;

2.4.15 The first half shaft 67 and the second half shaft 68 are half shafts for electric vehicles;

The transmission scheme involved in the present invention generates two gears, the first gear and the second gear, by controlling the engagement or separation of the first gear clutch C1 and the second gear clutch C2; the working principle of the present invention is briefly as follows:

1. When the first gear clutch C1 is disengaged and the second gear clutch C2 is disengaged, the electric vehicle is in neutral, and the power cannot be transmitted from the driving motor E to the first half shaft 67 and the second half shaft 68;

2. When the first-gear clutch C1 is engaged and the second-gear clutch C2 is disengaged, the electric vehicle is in the first gear, and the power is from the driving motor E through the input shaft 1, the first-gear clutch C1, the first-gear driving gear 2, and the first-gear driven gear. The gear 54, the intermediate shaft 53, the driving gear 56 of the final drive, the driven gear 60 of the final drive, and the differential assembly 61 are transmitted to the first half shaft 67 and the second half shaft 68; the speed of the input shaft 1 is related to the main drive The ratio of the speed of the driven gear 60 is the transmission ratio of the first gear;

3. When the first-gear clutch C1 is separated and the second-gear clutch C2 is combined, the electric vehicle is in the second gear, and the power is from the drive motor E through the input shaft 1, the second-gear clutch C2, the second-gear driving gear 3, and the second-gear driven gear The gear 55, the intermediate shaft 53, the driving gear 56 of the final drive, the driven gear 60 of the final drive, and the differential assembly 61 are transmitted to the first half shaft 67 and the second half shaft 68; the speed of the input shaft 1 is related to the main drive The ratio of the speed of the driven gear 60 is the transmission ratio of the second gear;

Wherein, when the drive motor E rotates forward, the first gear and the second gear are forward first gear and forward second gear; when the drive motor E rotates reversely, the first gear and second gear are reverse first gear and reverse second gear. block. The transmission ratios of the first forward gear and the first reverse gear are the same, ranging from 5 to 15; the transmission ratios of the second forward gear and the second reverse gear are the same, ranging from 2 to 12.

The box structure of the present invention may have a variety of technical solutions due to changes in specific design requirements, and other box structures obtained based on the present invention are within the claims of the present invention;

The gear structure of the present invention may have various technical solutions due to changes in specific design requirements, and other gear structures obtained based on the present invention are within the claims of the present invention;

The clutch structure of the present invention will have multiple technical solutions due to changes in specific design requirements, and other types of clutch structures obtained based on the present invention are within the claims of the present invention;

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (33)

1. a kind of two shift transmission used for electric vehicle, is suitable for the preposition forerunner of motor lateral arrangement or rearmounted engine rear-drive automobile, institute State output end of two shift transmissions (T) positioned at motor (E)；It is characterized in that：Two shift transmission (T) is triple axle knot Structure, it includes input axle assembly (I), countershaft assembly (M), output assembly (O) and casing assembly (B)；They are each other Relation be：The input axle assembly (I), countershaft assembly (M), output assembly (O) rotation centerline it is parallel, and the input shaft Assembly (I), countershaft assembly (M), output assembly (O) are mounted and are supported on casing assembly (B)；

Wherein, the casing assembly (B) includes the first casing (B1), the second casing (B2)；First casing (B1) and the second casing (B2) it is fixedly connected；First casing (B1) is fixedly connected or is made of one with the output end of motor (E)；

Wherein, the input axle assembly (I) comprising input shaft (1), one gear driving gear (2), two gear driving gear (3), one keep off from Clutch (C1), two gears clutch (C2), input Simmer ring (4), input shaft adjust pad (5), clutch shaft bearing (6), the second axle Hold (7), 3rd bearing (8), fourth bearing (9), 5th bearing (10), 6th bearing (11), 7th bearing (12), 8th bearing (13), the 9th bearing (14)；Above-mentioned part overlaps with the rotation centerline of motor (E)；One gear clutch (C1), a gear Driving gear (2), two gear driving gear (3), two gears clutch (C2) are from close motor (E) to away from motor (E) Direction in turn arranges；The input shaft (1) is installed by second bearing (7) near one end of motor (E) and is supported on first On casing (B1), the input shaft (1) is installed by 8th bearing (13) away from one end of motor (E) and is supported on the second casing (B2) on, the input shaft (1) is fixedly connected with the output of motor (E)；One gear driving gear (2) is by fourth bearing (9) install and be supported on input shaft (1)；The two gear driving gear (3) is installed by 6th bearing (11) and is supported on input shaft (1) On；One gear clutch (C1) is installed by clutch shaft bearing (6) near one end of motor (E) and is supported on the first casing (B1) On, gear clutch (C1) is enclosed within input shaft (1) away from one end of motor (E)；This two gear clutch (C2) away from One end of motor (E) is installed by the 9th bearing (14) and is supported on the second casing (B2), and two gear clutch (C2) is leaned on One end of nearly motor (E) is enclosed within input shaft (1)；The 3rd bearing (8) is positioned at gear clutch (C1) and a gear active Between gear (2), 3rd bearing (8) empty set is played gear clutch (C1) and a gear driving gear on input shaft (1) (2) effect of rotating speed decoupling；Between gear driving gear (2) and two gear driving gear (3), this for the 5th bearing (10) Five bearings (10) empty set is played gear driving gear (2) and the decoupling of two gear driving gear (3) rotating speed on input shaft (1) Effect；The 7th bearing (12) is kept off between clutch (C2) positioned at two gear driving gear (3) and two, 7th bearing (12) empty set On input shaft (1), play a part of two gear driving gear (3) and two gear clutch (C2) rotating speed decouplings；The input shaft is close The inner ring installation of seal (4) is supported on input shaft (1) and is close on the axle journal of motor (E) side, the input Simmer ring (4) Outer shroud install be supported on the first casing (B1), play by the inside of two shift transmissions (T) and external environment sealing isolation Effect；The input shaft adjust pad (5) between first casing (B1) and clutch shaft bearing (6) of casing assembly (B), the input Axial adjustment pad (5) empty set plays a part of adjustment input axle assembly (I) installation dimension chain on the first casing (B1)；

Wherein, the countershaft assembly (M) subtracts comprising jackshaft (53), gear driven gear (54), two gears driven gear (55), master Fast device driving gear (56), the tenth bearing (57), the 11st bearing (58), jackshaft adjust pad (59)；Except middle axial adjustment Outward, the rotation centerline of above-mentioned remaining part overlaps pad (59)；Tenth bearing (57), main reducing gear driving gear (56), One gear driven gear (54), two gears driven gear (55), the 11st bearing (58) are on jackshaft (53) near motor (E) in turn arranged to away from motor (E) direction；One gear driven gear (54) is fixedly connected with jackshaft (53)；Should Two gears driven gear (55) are fixedly connected with jackshaft (53)；The main reducing gear driving gear (56) is fixed with jackshaft (53) to be connected Connect or be made of one；The inner ring of the tenth bearing (57) is arranged on jackshaft (53) and is close on the axle journal of motor (E) side, The outer ring of the tenth bearing (57) is arranged on the first casing (B1), and the inner ring of the 11st bearing (58) is arranged on jackshaft (53) away from the axle journal of motor (E) side, the outer ring of the tenth bearing (58) is arranged on the second casing (B2)；In this Countershaft adjust pad (59) between the 11st bearing (58) and the second casing (B2), the jackshaft adjust pad (59) Outer shroud is installed and is supported on the second casing (B2), plays a part of to adjust countershaft assembly (M) installation dimension chain；

Wherein, the output assembly (O) comprising main reducing gear driven gear (60), differential assembly (61), the 12nd bearing (62), 13rd bearing (63), output shaft adjust pad (64), the sealing ring of output shaft first (65), the sealing ring of output shaft second (66), First semiaxis (67), the second semiaxis (68)；The main reducing gear driven gear (60), differential assembly (61), the 12nd bearing (62), the 13rd bearing (63), the first semiaxis (67), the rotation centerline of the second semiaxis (68) overlap；First semiaxis (67), The sealing ring of output shaft first (65), output shaft adjust pad (64), the 12nd bearing (62), differential assembly (61), main deceleration Device driven gear (60), the 13rd bearing (63), the sealing ring of output shaft second (66), the second semiaxis (68) are near motor (E) in turn arranged to away from motor (E) direction；The main reducing gear driven gear (60) is fixed with differential assembly (61) Connection；The inner ring of the 12nd bearing (62) installs the axle journal for being supported on differential assembly (61) near motor (E) side On, the outer ring of the 12nd bearing (62) is installed and is supported on the first casing (B1), and the inner ring of the 13rd bearing (63) is installed Differential assembly (61) is supported on away from the axle journal of motor (E) side, branch is installed in the outer ring of the 13rd bearing (63) Support is on the second casing (B2)；The one end and the fixed company of differential assembly (61) of first semiaxis (67) away from motor (E) Connect；Second semiaxis (68) is fixedly connected near one end of motor (E) with differential assembly (61)；The output shaft adjusting pad Between the first casing (B1) and the 12nd bearing (62), the outer shroud of the output shaft adjust pad (64) installs support to piece (64) On the first casing (B1), play a part of adjustment output assembly (O) installation dimension chain；The sealing ring of the output shaft first (65) Inner ring is installed and is supported on the first semiaxis (67), and the outer shroud of the sealing ring of the output shaft first (65) is installed and is supported on the first casing (B1) on, play a part of for the inside of two shift transmissions (T) and external environment to seal isolation；The sealing ring of output shaft second (66) inner ring is installed and is supported on the second semiaxis (68), and the outer shroud of the sealing ring of the output shaft second (66) is installed and is supported on second On casing (B2), play a part of for the inside of two shift transmissions (T) and external environment to seal isolation.

2. one kind according to claim 1 two shift transmission used for electric vehicle, it is characterised in that：The input shaft (1), centre Axle (53) is revolving structure part.

3. one kind according to claim 1 two shift transmission used for electric vehicle, it is characterised in that：The one gear driving gear (2), two gear driving gear (3), gear driven gear (54), two gears driven gear (55), main reducing gear driving gear (56), master Retarder driven gearwheel (60) is roller gear.

4. one kind according to claim 1 two shift transmission used for electric vehicle, it is characterised in that：The input Simmer ring (4), the sealing ring of output shaft first (65), the sealing ring of output shaft second (66) are rotary sealing part.

5. one kind according to claim 1 two shift transmission used for electric vehicle, it is characterised in that：The input shaft adjust pad (5), output shaft adjust pad (64), jackshaft adjust pad (59) are revolving structure part.

6. one kind according to claim 1 two shift transmission used for electric vehicle, it is characterised in that：The clutch shaft bearing (6), Two bearings (7), 3rd bearing (8), fourth bearing (9), 5th bearing (10), 6th bearing (11), 7th bearing (12), the 8th Bearing (13), the 9th bearing (14), the tenth bearing (57), the 11st bearing (58), the 12nd bearing (62), the 13rd bearing (63) it is rolling bearing standard component.

7. one kind according to claim 1 two shift transmission used for electric vehicle, it is characterised in that：One gear clutch (C1) Be multi-plate friction clutch, drive end of gear clutch (C1) comprising an outer hub bearing (15) of gear, one keep off outer hub (16), One gear the first antithesis piece (21), one gear the second antithesis piece (23), one gear the 3rd antithesis piece (25), one gear the 4th antithesis piece (27), One the 5th antithesis piece (29) of gear, the 6th antithesis piece (31) of gear, an outer hub back-up ring (32) of gear, this one keeps off the driven of clutch (C1) End includes the first friction plate of a gear (22), the second friction plate of a gear (24), the 3rd friction plate (26) of gear, the 4th friction plate of gear (28), hub (33) in the 5th friction plate (30) of gear, a gear, the actuating station of gear clutch (C1) is lived comprising a gear clutch Plug chamber (P1), gear piston (17), gear groups of springs (18), gear groups of springs mounting seat (19), an outer hub bearing back-up ring of gear (20), this one gear clutch (C1) actuating station can by one gear clutch (C1) drive end and one gear clutch (C1) from Moved end is selectively engaged, and will be input into the input shaft (1) of axle assembly (I) and the one of input axle assembly (I) keeps off driving gear (2) temporarily When couple together so that realize transmit torque effect.

8. one kind according to claim 7 two shift transmission used for electric vehicle, it is characterised in that：The outer hub bearing of one gear (15) clutch shaft bearing (6) installation near one end of motor (E) by being input into axle assembly (I) is supported on the first casing (B1) On, the outer hub bearing (15) of a gear is fixedly connected away from one end of motor (E) with the input shaft (1) of input axle assembly (I)；

The inner ring of the outer hub (16) of one gear is fixed on outer hub bearing (15) of a gear；

The inner ring of hub (33) is fixed on gear driving gear (2) of input axle assembly (I) in one gear；

One the first antithesis piece of the gear (21), the first friction plate of a gear (22), the second antithesis piece of a gear (23), second friction plate of gear (24), the 3rd antithesis piece (25) of gear, the 3rd friction plate (26) of gear, the 4th antithesis piece (27) of gear, the 4th friction plate of gear (28), the 5th antithesis piece (29) of gear, the 5th friction plate (30) of gear, the 6th antithesis piece (31) of gear, an outer hub back-up ring of gear (32) in turn arranged to away from motor (E) direction near motor (E)；

The outer shroud of one the first antithesis piece of the gear (21), the outer shroud of the second antithesis piece of a gear (23), one keep off the 3rd antithesis piece (25) Outer shroud, the outer shroud of the 4th antithesis piece (27) of gear, the outer shroud of the 5th antithesis piece (29) of gear, one keep off the outer of the 6th antithesis piece (31) Ring is fixed on the outer hub (16) of a gear；

The inner ring of one the first friction plate of the gear (22), the inner ring of the second friction plate of a gear (24), one keep off the 3rd friction plate (26) Inner ring, the inner ring of the 4th friction plate (28) of gear, the inner ring of the 5th friction plate (30) of gear are fixed on hub (33) in a gear On；

The outer shroud of the outer hub back-up ring (32) of one gear is arranged in the inner groove of an outer hub (16) of gear, is played to the 6th antithesis piece of gear (31) effect of axial limiting；

One gear piston (17), gear groups of springs (18), gear groups of springs mounting seat (19), an outer hub bearing back-up ring (20) of gear from In turn arranged to away from motor (E) direction near motor (E)；

The inner ring of one gear piston (17) is installed and is supported on outer hub bearing (15) of a gear；

The inner ring of one gear groups of springs mounting seat (19) is installed and is supported on outer hub bearing (15) of a gear, and the gear groups of springs is installed The outer shroud of seat (19) is installed and is supported on a gear piston (17)；

One gear groups of springs (18) is installed near one end of motor (E) and is supported on a gear piston (17), the gear spring Group (18) is supported in gear groups of springs mounting seat (19) away from one end of motor (E)；

The inner ring of the outer hub bearing back-up ring (20) of one gear is arranged in the outer groove of an outer hub bearing (15) of gear, is played to a gear bullet The effect of spring group mounting seat (19) axial limiting；

One gear clutch piston cavity (P1) is located between an outer hub bearing (15) of gear and gear piston (17), the gear clutch Plunger shaft (P1) is filled with the hydraulic oil in the hydraulic system from two shift transmissions (T), gear clutch piston cavity (P1) The pressure of formation promotes gear piston (17) to overcome the spring force of a gear groups of springs (18) to be transported to the direction away from motor (E) It is dynamic, allow a gear piston (17) to compress one and keep off the first antithesis piece (21), the first friction plate of a gear (22), second antithesis piece of gear (23), the second friction plate of a gear (24), the 3rd antithesis piece (25) of gear, the 3rd friction plate (26) of gear, the 4th antithesis piece of gear (27), the 4th friction plate (28) of gear, the 5th antithesis piece (29) of gear, the 5th friction plate (30) of gear, the 6th antithesis piece of gear (31), play the articulate effect of driven end of the drive end of gear clutch (C1) and gear clutch (C1).

9. one kind according to claim 7 two shift transmission used for electric vehicle, it is characterised in that：The outer hub bearing of one gear (15) it is revolving structure part, has an outer groove away from motor (E) end.

10. one kind according to claim 7 two shift transmission used for electric vehicle, it is characterised in that：The outer hub (16) of one gear It is revolving structure part, has an inner groove away from motor (E) end.

11. one kind two shift transmissions used for electric vehicle according to claim 7, it is characterised in that：One gear piston (17) It is revolving structure part.

12. one kind two shift transmissions used for electric vehicle according to claim 7, it is characterised in that：The one gear groups of springs (18) helical spring being arranged circumferentially by multiple is constituted.

13. one kind two shift transmissions used for electric vehicle according to claim 7, it is characterised in that：The one gear groups of springs peace Dress seat (19) is revolving structure part.

14. one kind two shift transmissions used for electric vehicle according to claim 7, it is characterised in that：The outer hub bearing of one gear Back-up ring (20) is revolving structure part.

15. one kind two shift transmissions used for electric vehicle according to claim 7, it is characterised in that：One gear, first antithesis Piece (21), the second antithesis piece of a gear (23), the 3rd antithesis piece (25) of gear, the 4th antithesis piece (27) of gear, the 5th antithesis of gear Piece (29), the 6th antithesis piece (31) of gear are revolving structure part.

16. one kind two shift transmissions used for electric vehicle according to claim 7, it is characterised in that：One gear first rubs Piece (22), the second friction plate of a gear (24), the 3rd friction plate (26) of gear, the 4th friction plate (28) of gear；One gear the 5th rubs Piece (30) is revolving structure part, and surface is friction material.

17. one kind two shift transmissions used for electric vehicle according to claim 7, it is characterised in that：The outer hub bearing of one gear Back-up ring (32) is revolving structure part.

18. one kind two shift transmissions used for electric vehicle according to claim 7, it is characterised in that：Hub (33) in one gear It is revolving structure part.

19. one kind two shift transmissions used for electric vehicle according to claim 1, it is characterised in that：The two gears clutch (C2) it is multi-plate friction clutch, the drive end of two gear clutch (C2) includes the two outer hub bearings (34) of gear, the two outer hubs of gear (35), two the first antithesis piece of gears (40), two the second antithesis piece of gears (42), two the 3rd antithesis pieces (44) of gear, two the 4th antithesis pieces of gear (46), two the 5th antithesis pieces (48) of gear, two the 6th antithesis pieces (50) of gear, the two outer hub back-up rings (51) of gear, two gear clutch (C2) Driven end comprising two gear the first friction plate (41), two gear the second friction plate (43), two gear the 3rd friction plates (45), two gear the 4th Friction plate (47), two gear the 5th friction plates (49), two gear in hub (52), this two gear clutch (C2) actuating station comprising two keep off from Clutch plunger shaft (P2), two gears piston (36), two gears groups of springs (37), two gears groups of springs mounting seat (38), the two outer hub bearings of gear Back-up ring (39), the actuating station of two gear clutch (C2) can be by the drive end of two gears clutch (C2) and two gears clutch (C2) Driven end be selectively engaged, will be input into axle assembly (I) input shaft (1) and be input into axle assembly (I) two gear driving gear (3) temporarily couple together, so as to realize transmitting the effect of torque.

20. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：The outer hub bearing of two gears (34) away from motor (E) one end by be input into axle assembly (I) the 9th bearing (14) install be supported on casing assembly (B) The second casing (B2) on, the two outer hub bearing (34) of gear is near one end of motor (E) and the input for being input into axle assembly (I) Axle (1) is fixedly connected；

The inner ring of the outer hub (35) of two gears is fixed on outer hub bearing (34) of two gears；

The inner ring of hub (52) is fixed in the two gear driving gear (3) of input axle assembly (I) in two gear；

Two the first antithesis piece of the gear (40), two the first friction plate of gears (41), two the second antithesis piece of gears (42), two the second friction plates of gear (43), two the 3rd antithesis pieces (44) of gear, two the 3rd friction plates (45) of gear, two the 4th antithesis pieces (46) of gear, two the 4th friction plates of gear (47), two the 5th antithesis pieces (48) of gear, two the 5th friction plates (49) of gear, two the 6th antithesis pieces (50) of gear, the two outer hub back-up rings of gear (51) in turn arranged near motor (E) direction from away from motor (E)；

The outer shroud of two the first antithesis piece of the gear (40), the outer shroud of two the second antithesis piece of gears (42), two keep off the 3rd antithesis pieces (44) Outer shroud, the outer shroud of two the 4th antithesis pieces (46) of gear, the outer shroud of two the 5th antithesis pieces (48) of gear, two keep off the outer of the 6th antithesis pieces (50) Ring is fixed on the outer hub (35) of two gears；

The inner ring of two the first friction plate of the gear (41), the inner ring of two the second friction plate of gears (43), two keep off the 3rd friction plates (45) Inner ring, the inner ring of two the 4th friction plates (47) of gear, the inner ring of two the 5th friction plates (49) of gear are fixed on hub (52) in two gears On；

The outer shroud of the outer hub back-up ring (51) of two gears is arranged in the inner groove of the two outer hubs (35) of gear, is formed to two the 6th antithesis pieces of gear (50) effect of axial limiting；

Two gear piston (36), two gears groups of springs (37), two gears groups of springs mounting seat (38), the two outer hub bearing back-up rings (39) of gear from In turn arranged near motor (E) direction away from motor (E)；

The inner ring of two gear piston (36) is installed and is supported on outer hub bearing (34) of two gears；

The inner ring of two gear groups of springs mounting seat (38) is installed and is supported on outer hub bearing (34) of two gears, and the two gears groups of springs is installed The outer shroud of seat (38) is installed and is supported on two gear pistons (36)；

Two gear groups of springs (37) is supported in two gear groups of springs mounting seat (38) near one end of motor (E), two gear Groups of springs (37) is installed away from one end of motor (E) and is supported on two gear pistons (36)；

The inner ring of the outer hub bearing back-up ring (51) of two gears is arranged in the outer groove of the two outer hub bearings (34) of gear, is formed to two gear bullets The effect of spring group mounting seat (38) axial limiting；

Two gear clutch piston cavity (P2) is located between two gears piston (36) and the two outer hub bearings (34) of gear, the two gears clutch Plunger shaft (P2) is filled with the hydraulic oil in the hydraulic system from two shift transmissions (T), two gear clutch piston cavity (P2) The pressure of formation promotes two gears piston (36) to overcome the spring force of two gear groups of springs (37) to be transported near the direction of motor (E) It is dynamic, allow two gear pistons (36) to compress two and keep off the first antithesis piece (40), two the first friction plate of gears (41), two the second antithesis pieces of gear (42), two the second friction plate of gears (43), two the 3rd antithesis pieces (44) of gear, two the 3rd friction plates (45) of gear, two the 4th antithesis pieces of gear (46), two the 4th friction plates (47) of gear, two the 5th antithesis pieces (48) of gear, two the 5th friction plates (49) of gear, two the 6th antithesis pieces of gear (50), formed the articulate effect of driven end of the drive end of two gears clutch (C2) and two gears clutch (C2).

21. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：The outer hub bearing of two gears (34) it is revolving structure part, has an outer groove near motor (E) end.

22. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：The outer hub (35) of two gears It is revolving structure part, has an inner groove near motor (E) end.

23. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：Two gear piston (36) It is revolving structure part.

24. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：The two gears groups of springs (37) helical spring being arranged circumferentially by multiple is constituted.

25. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：The two gears groups of springs peace Dress seat (38) is revolving structure part.

26. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：The outer hub bearing of two gears Back-up ring (39) is revolving structure part.

27. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：Two gears, first antithesis Piece (40), the second antithesis piece of a gear (42), the 3rd antithesis piece (44) of gear, the 4th antithesis piece (46) of gear, the 5th antithesis of gear Piece (48), the 6th antithesis piece (50) of gear are revolving structure part.

28. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：Two gear first rubs Piece (41), two the second friction plate of gears (43), two the 3rd friction plates (45) of gear, two the 4th friction plates (47) of gear；Two gears the 5th rub Piece (49) is revolving structure part, and surface is friction material.

29. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：The outer hub bearing of two gears Back-up ring (51) is revolving structure part.

30. one kind two shift transmissions used for electric vehicle according to claim 19, it is characterised in that：Hub (52) in two gear It is revolving structure part.

31. one kind two shift transmissions used for electric vehicle according to claim 1, it is characterised in that：The one gear clutch (C1) and two gear clutch (C2) engagement or separation, produce one gear and two gear two gears：

When described one gear clutch (C1) separation, two gears clutch (C2) are separated, the electric automobile is in neutral, and power cannot The first semiaxis (67) and the second semiaxis (68) are transferred to from motor (E)；

Combine when described one gear clutch (C1), when two gears clutch (C2) are separated, the electric automobile is in a gear, and power is from drive Dynamic motor (E) is through input shaft (1), gear clutch (C1), gear driving gear (2), gear driven gear (54), jackshaft (53), main reducing gear driving gear (56), main reducing gear driven gear (60), differential assembly (61) are transferred to the first semiaxis And the second semiaxis (68) (67)；The rotating speed of input shaft (1) is a gear with the ratio of the rotating speed of main reducing gear driven gear (60) Gearratio；

Separate when described one gear clutch (C1), when two gears clutch (C2) are combined, the electric automobile is in two gears, and power is from drive Dynamic motor (E) is through input shaft (1), two gears clutch (C2), two gear driving gear (3), two gears driven gear (55), jackshaft (53), main reducing gear driving gear (56), main reducing gear driven gear (60), differential assembly (61) are transferred to the first semiaxis And the second semiaxis (68) (67)；The rotating speed of input shaft (1) is two gears with the ratio of the rotating speed of main reducing gear driven gear (60) Gearratio.

32. one kind two shift transmissions used for electric vehicle according to claim 31, it is characterised in that：As motor (E) When rotating forward, a gear and two gears are forward gear and two gears that advance；When motor (E) is reversely rotated, described one Gear and two gears are a gear and two gears.

33. one kind two shift transmissions used for electric vehicle according to claim 32, it is characterised in that：Described forward gear The gearratio of a gear is identical；Two gears that advance are identical with the gearratio of two gears.