WO2020181671A1

WO2020181671A1 - Dual motor transaxle case

Info

Publication number: WO2020181671A1
Application number: PCT/CN2019/090821
Authority: WO
Inventors: 李占江; 高超; 蒋元广; 湛时时; 薛正成
Original assignee: 南京越博动力系统股份有限公司
Priority date: 2019-03-11
Filing date: 2019-06-12
Publication date: 2020-09-17

Abstract

A dual motor transaxle case, comprising a first motor (19), a second motor (38), a first intermediate shaft (1), a second intermediate shaft (35), a first input shaft (18), a second input shaft (37), a differential (39), a first main reducer driving gear (12), a second main reducer driving gear (29), a main reducer driven gear (30), a first-gear driving gear (9), a first-gear driven gear (10), a second-gear driving gear (27), a second-gear driven gear (28), a third-gear driving gear (2), a third-gear driven gear (5), a fourth-gear driving gear (23), a fourth-gear driven gear (21), a fifth-gear driving gear (42), a fifth-gear driven gear (43), a sixth-gear driving gear (44), and a sixth-gear driven gear (45).

Description

Double motor drive axle box

Cross references to related applications

This application requires Nanjing Yuebo Power System Co., Ltd. to file on March 11, 2019, the application name is "Dual Motor Drive Axle Box", the Chinese patent application number "201910181815.7" and Nanjing Yuebo Power System Co., Ltd. The priority of the Chinese patent application number "201920303265.7" filed on March 11, 2019 with the application name "Dual Motor Drive Axle Box".

Technical field

This application relates to the technical field of electric vehicles, in particular to a dual-motor drive axle box.

Background technique

Environmental protection and energy saving are important issues facing the world in the 21st century. The Chinese government has also put forward the basic national policy of building a conservation-oriented society and an industrial development policy that encourages the development of small-emission energy-saving vehicles. Electric vehicles are to achieve this goal. One of the important methods. Reducer, drive axle and electric motor are all important parts of electric vehicles.

The Chinese patent application with application number 201510391895.0 discloses a dual-motor drive axle structure. The technical solution includes an axle housing located at the bottom of the frame. Two independent drive motors are arranged side by side in the axle housing. The main shaft of each motor is equipped with a planetary reducer. The power output by the drive motor is transmitted to the axle through the planetary reducer. The transmission shaft is transmitted to a pair of front driving wheels or rear driving wheels of the electric vehicle through the transmission shaft. This technical solution reduces the unsprung quality of the chassis and improves the service life of tires and ride comfort. However, there are problems of power interruption during operation, which affects the driving experience of the car; high-torque motors are expensive and costly. The system is inefficient.

The Chinese patent application with application number 201811198399.3 discloses a hybrid electric vehicle transmission system, which belongs to the field of hybrid power technology. The technical solution includes: an engine, a first motor, a second motor, a planetary gear train, a first rotating shaft, a second clutch, a third clutch, a ring gear joint and a battery pack; the planetary gear train includes: a planet carrier, a sun gear, The planet gear and the ring gear, the sun gear and the planet gear are located on the planet carrier, the outer gear ring of the sun gear meshes with the inner gear ring of the planet gear, and the ring gear meshes with the outer gear ring of the planet gear; the engine and the first rotating shaft One end is connected; one end of the first motor is connected to the ring gear through the ring gear joint, and the other end is connected to the battery pack; one end of the second motor is connected to the second clutch, and the other end is connected to the battery pack; planet carrier, third clutch, second The clutch is sequentially connected with the first rotating shaft; the other end of the first rotating shaft is provided with a power output wheel, which is connected with the wheels. This technical solution enables the vehicle to have good fuel economy, but it is not suitable for pure electric vehicles.

Application content

In view of the shortcomings of the prior art, the purpose of this application is to provide a high-efficiency dual-motor drive axle box.

The technical solution for solving the problem of the present application is: the drive axle box includes a first motor, a second motor, a first intermediate shaft, a second intermediate shaft, a first input shaft, a second input shaft, a differential, and a first main shaft. Reduce driving gear, second main reduction driving gear, main reduction driven gear, first speed driving gear, first speed driven gear, second speed driving gear, second speed driven gear, third speed driving gear, third speed driven gear, Fourth-speed driving gear, fourth-speed driven gear, fifth-speed driving gear, fifth-speed driven gear, sixth-speed driving gear, sixth-speed driven gear, direct first-speed driving gear, direct first-speed driven gear, direct second-speed driving Gear and direct second-speed driven gear;

The first input shaft and the first intermediate shaft are arranged in parallel; the first input shaft includes a first input shaft right half shaft and a first input shaft left half shaft that can be connected to each other, and the first input shaft right half shaft is connected with the first motor ; Direct one-speed driving gear is fixedly arranged on the right half shaft of the first input shaft; the first main reduction driving gear is fixedly arranged on the left half shaft of the first input shaft; first-speed driven gear, third-speed driven gear, five The gear driven gear is sleeved on the left half shaft of the first input shaft; the left half shaft of the first input shaft is slidably provided with a first gear sleeve and a second gear sleeve; the direct first gear driving gear is provided with first coupling teeth, One coupling tooth can be connected with the first gear sleeve; the first gear driven gear is provided with second coupling teeth, and the second coupling teeth can be connected with the second gear sleeve; the third gear driven gear is provided with third coupling teeth, The three coupling teeth can be connected with the second gear sleeve; the fifth gear driven gear is provided with a seventh coupling tooth, and the seventh coupling tooth can be connected with the first gear sleeve; the direct first gear driven gear, the first gear driving gear and the third gear The transmission driving gear is fixedly arranged on the first intermediate shaft; the first main reduction driving gear meshes with the main reduction driven gear; the main reduction driven gear is connected with the differential;

The second input shaft and the second intermediate shaft are arranged in parallel; the second input shaft includes a second input shaft right half shaft and a second input shaft left half shaft that can be connected to each other, and the second input shaft right half shaft is connected with the second motor ; Direct second gear driven gear is fixedly arranged on the right half shaft of the second input shaft; the second main reduction driving gear is fixedly arranged on the second input half shaft and left half shaft; second gear driven gear, fourth gear driven gear and The sixth-speed driven gear is sleeved on the left half shaft of the second input shaft; the left half shaft of the second input shaft is slidably provided with a third gear sleeve and a fourth gear sleeve; the direct second gear driving gear is provided with an eighth coupling tooth, The eighth coupling tooth can be connected with the third gear sleeve; the second gear driven gear is provided with fifth coupling teeth, and the fifth coupling tooth can be connected with the fourth gear sleeve; the fourth gear driven gear is provided with sixth coupling teeth, The sixth coupling tooth can be connected with the fourth gear sleeve; the sixth-speed driven gear is provided with a fourth coupling tooth, which can be connected with the third gear sleeve; the direct second-speed driven gear, the second-speed driving gear and The fourth-speed driving gear is fixedly arranged on the second intermediate shaft; the second main reduction driving gear meshes with the main reduction driven gear.

Further, the axle box further includes a first gear hub fixedly arranged on the left half shaft of the first output shaft; the first gear is sleeved on the first gear hub; the first gear sleeve can slide axially so as to be combined with the first tooth Or the seventh coupling tooth meshes.

Further, the axle box further includes a second gear hub fixedly arranged on the left half shaft of the first output shaft; the second gear is sleeved on the second gear hub; the second gear sleeve can slide axially so as to be combined with the second tooth Or the third coupling tooth meshes.

Further, the axle box further includes a third gear hub fixedly arranged on the left half shaft of the second output shaft; the third gear is sleeved on the third gear hub; the third gear sleeve can axially slide, thereby connecting with the fourth gear Or the eighth coupling tooth meshes.

Further, the axle box further includes a fourth gear hub fixedly arranged on the left half shaft of the second output shaft; the fourth gear is sleeved on the fourth gear hub; the fourth gear sleeve can slide axially so as to be combined with the sixth tooth Or the fifth coupling tooth meshes.

Further, the first gear sleeve, the second gear sleeve, the third gear sleeve and the fourth gear sleeve are driven to slide by air cylinders.

Compared with the prior art, the beneficial effects of this application are:

1. The parallel dual input shaft system is adopted, and the power will not be interrupted when shifting gears.

2. In the case of parallel dual input shafts, the internal space of the transmission is reasonably arranged and the structure is simple.

3. Adopt dual-motor drive, so that no matter whether the car is in acceleration, low-speed or high-speed conditions, the single-motor drive and dual-motor drive mode switch, so that the motor always works in the efficient operation area, thereby avoiding the waste of electric energy .

Description of the drawings

Fig. 1 is a schematic diagram of the structure of the drive axle box.

Figure 2 is a diagram of the power transmission route of the drive axle box when the first gear is working.

Figure 3 is a power transmission route diagram of the drive axle box when the second gear is working.

Figure 4 is a diagram of the power transmission route of the drive axle box when working in third gear.

Figure 5 is a power transmission route diagram of the drive axle box when the fourth gear is working.

Figure 6 is a diagram of the power transmission route of the drive axle box when the fifth gear is working.

Fig. 7 is a power transmission route diagram of the drive axle box when the sixth gear is working.

Fig. 8 is a power transmission route diagram of the drive axle box when the first gear and the second gear are working simultaneously.

Fig. 9 is a power transmission route diagram of the drive axle box when the second gear and the third gear are working simultaneously.

Fig. 10 is a power transmission route diagram of the drive axle box when the third gear and the fourth gear are working simultaneously.

Fig. 11 is a power transmission route diagram of the drive axle box when the fourth gear and the fifth gear are working simultaneously.

Fig. 12 is a power transmission route diagram of the drive axle box when the fifth gear and the sixth gear are working simultaneously.

Description of Reference Signs: 1-first intermediate shaft; 2-third gear driving gear; 3-second coupling tooth; 4-fifth coupling tooth; 5-third-speed driven gear; 6-third coupling tooth; 7- Second gear hub; 8-second gear sleeve; 9-first-speed driving gear; 10-first-speed driven gear; 11-first output shaft; 12-first main reduction driving gear; 13-seventh combined tooth; 14-first gear sleeve; 15-first gear hub; 16-direct first-speed driven gear; 17-direct first-speed driving gear; 18-first input shaft; 19-first motor; 20-second output shaft ; 21-fourth gear driven gear; 23-fourth gear driving gear; 24-sixth combined tooth; 25-fourth gear hub; 26-fourth gear sleeve; 27-second gear driving gear; 28-second gear driven Gear; 29-second main reduction driving gear; 30-main reduction driven gear; 31-fourth combined tooth; 32-third gear sleeve; 33-third gear hub; 34-direct second-speed driven gear; 35 -Second intermediate shaft; 36- direct second-speed driving gear; 37- second input shaft; 38- second motor; 39- differential; 40- second half shaft; 41- first half shaft; 42- five Gear driving gear; 43-fifth gear driven gear; 44-sixth gear driving gear; 45-sixth gear driven gear; 46-first coupling gear; 47-eighth coupling gear; 48-first input shaft right half shaft ; 49-Left half shaft of the first input shaft; 50-Right half shaft of the second input shaft; 51-Left half shaft of the second input shaft.

detailed description

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the application, but should not be understood as a limitation to the application.

As shown in Figure 1, the drive axle box includes a first motor 19, a second motor 38, a first intermediate shaft 1, a second intermediate shaft 35, a first input shaft 18, a second input shaft 37, and a differential 39. , The first main reduction driving gear 12, the second main reduction driving gear 29, the main reduction driven gear 30, the first-speed driving gear 9, the first-speed driven gear 10, the second-speed driving gear 27, the second-speed driven gear 28, Third-speed driving gear 2, third-speed driven gear 5, fourth-speed driving gear 23, fourth-speed driven gear 21, fifth-speed driving gear 42, fifth-speed driven gear 43, sixth-speed driving gear 44, sixth-speed driven gear 45. Direct first-speed driving gear 17, direct first-speed driven gear 16, direct second-speed driving gear 36, and direct second-speed driven gear 34;

The first input shaft 18 and the first intermediate shaft 1 are arranged in parallel; the first input shaft 18 includes a first input shaft right half shaft 48 and a first input shaft left half shaft 49 that can be connected to each other, and the first input shaft right half shaft 48 Connected to the first motor 19; the direct first gear driving gear 17 is fixedly arranged on the first input shaft right half shaft 48; the first main reduction driving gear 12 is fixedly arranged on the first input shaft left half shaft 49; The driven gear 10, the third-speed driven gear 5, and the fifth-speed driven gear 43 are sleeved on the left half shaft 49 of the first input shaft; the left half shaft 49 of the first input shaft is slidably provided with a first gear sleeve 14 and a first gear sleeve 14 Two gear sleeve 8; the direct first gear driving gear 17 is provided with a first coupling tooth 46, the first coupling tooth 46 can be connected with the first gear sleeve 14; the first gear driven gear 10 is provided with a second coupling tooth 3, the second The coupling tooth 3 can be connected with the second gear sleeve 8; the third gear driven gear 5 is provided with a third coupling tooth 6 which can be connected with the second gear sleeve 8; the fifth gear driven gear 43 is provided with The seventh coupling tooth 13 can be connected with the first gear sleeve 14; the direct first-speed driven gear 16, the first-speed driving gear 9 and the third-speed driving gear 2 are fixedly arranged on the first intermediate shaft 1; The first main reduction driving gear 12 meshes with the main reduction driven gear 30; the main reduction driven gear 30 is connected with the differential 39;

The second input shaft 37 and the second intermediate shaft 35 are arranged in parallel; the second input shaft 37 includes a second input shaft right half shaft 50 and a second input shaft left half shaft 51 that can be connected to each other, and the second input shaft right half shaft 50 Connected to the second motor 38; the direct second-speed driven gear 36 is fixedly arranged on the second input shaft right half shaft 50; the second main reduction driving gear 29 is fixedly arranged on the second input shaft left half shaft 51; Gear driven gear 28, fourth gear driven gear 21, and sixth gear driven gear 45 are sleeved on the second input shaft left half shaft 51; the second input shaft left half shaft 51 is slidably provided with a third gear sleeve 32 and The fourth gear sleeve 26; the direct second gear driving gear 34 is provided with an eighth coupling tooth 47, which can be connected to the third gear sleeve 32; the second gear driven gear 28 is provided with a fifth coupling tooth 4, The fifth coupling tooth 4 can be connected with the fourth gear sleeve 26; the fourth gear driven gear 21 is provided with a sixth coupling tooth 24, and the sixth coupling tooth 24 can be connected with the fourth gear sleeve 26; the sixth gear driven gear 45 is provided There are fourth coupling teeth 31, the fourth coupling teeth 31 can be connected with the third gear sleeve 33; the direct second-speed driven gear 34, the second-speed driving gear 27 and the fourth-speed driving gear 23 are fixedly arranged on the second intermediate shaft 35 ; The second main reduction driving gear 29 and the main reduction driven gear 30 mesh.

Further, the axle box further includes a first gear hub 15 fixedly arranged on the left half shaft 49 of the first output shaft; the first gear sleeve 14 is installed on the first gear hub 15; the first gear sleeve 14 can slide axially, Thereby, it meshes with the first coupling tooth 46 or the seventh coupling tooth 13.

Further, the axle box also includes a second gear hub 7 fixedly arranged on the left half shaft 49 of the first output shaft; the second gear sleeve 8 is installed on the second gear hub 7; the second gear sleeve 8 can slide axially, Thereby, it meshes with the second coupling tooth 3 or the third coupling tooth 6.

Further, the axle box further includes a third gear hub 33 fixedly arranged on the left half shaft 51 of the second output shaft; the third gear sleeve 32 is installed on the third gear hub 33; the third gear sleeve 32 can slide axially, Thereby, it meshes with the fourth coupling tooth 31 or the eighth coupling tooth 47.

Further, the axle box further includes a fourth gear hub 25 fixedly arranged on the left half shaft 51 of the second output shaft; the fourth gear sleeve 26 is installed on the fourth gear hub 25; the fourth gear sleeve 26 can slide axially, Thereby, it meshes with the sixth coupling tooth 24 or the fifth coupling tooth 4.

Further, the first gear sleeve 14, the second gear sleeve 8, the third gear sleeve 32 and the fourth gear sleeve 26 are driven to slide by air cylinders (not shown in the figure) respectively.

The working process of the drive axle box: when working in the first gear directly, the first motor 19 works, and the first gear sleeve 14 is connected with the first coupling tooth 46 to realize the direct first gear. When the direct second gear works, the second motor 38 works, and the third gear sleeve 32 is connected with the eighth coupling tooth 47 to realize the direct second gear. As shown by the arrow in Fig. 2, when the first gear works, the first motor 19 works, and the second gear sleeve 8 is connected with the second coupling tooth 3 to realize the first gear. As shown by the arrow in Fig. 3, when the second gear works, the second motor 38 works, and the fourth gear sleeve 26 is connected with the fifth coupling tooth 4 to realize the second gear. As shown by the arrow in Fig. 4, when the third gear works, the second motor 38 works, and the second gear sleeve 8 is connected with the third coupling tooth 6 to realize the third gear. As shown by the arrow in Fig. 5, when the fourth gear works, the second motor 38 works, and the fourth gear sleeve 26 is connected with the sixth coupling tooth 24 to realize the fourth gear. As shown by the arrow in Fig. 6, when the fifth gear is working, the first motor 19 works, and the first gear sleeve 14 is connected with the seventh coupling tooth 13 to realize the fifth gear. As shown by the arrow in FIG. 7, when the sixth gear works, the second motor 38 works, and the third gear sleeve 32 is connected with the eighth coupling tooth 47 to realize the sixth gear.

When the first and second gears work at the same time, as shown by the arrows in Figure 8, the first motor 19 and the second motor 38 work at the same time, the second gear sleeve 8 is connected to the second coupling tooth 3, and the fourth gear sleeve 26 is connected to the fifth coupling tooth. 4Connect. As shown by the arrows in Figure 9, when the second and third gears work at the same time, the first motor 19 and the second motor 38 work at the same time, the fourth gear sleeve 26 is connected to the fifth coupling tooth 4, and the second gear sleeve 8 is connected to the third coupling tooth. 6Connect. As shown by the arrows in Figure 10, when the third and fourth gears work at the same time, the first motor 19 and the second motor 38 work at the same time, the second gear sleeve 8 is connected with the third coupling tooth 6, and the fourth gear sleeve 26 is connected with the sixth coupling tooth. 24 connections. As shown by the arrows in Figure 11, when the fourth and fifth gears work simultaneously, the first motor 19 and the second motor 38 work simultaneously, the fourth gear sleeve 26 is connected with the sixth coupling tooth 24, and the first gear sleeve 14 is connected with the seventh coupling tooth. 13Connect. As shown by the arrows in Figure 12, when the fifth and sixth gears work at the same time, the first motor 19 and the second motor 38 work at the same time, the first gear sleeve 14 is connected to the seventh coupling tooth 13, and the third gear sleeve 32 is connected to the eighth coupling tooth. 47 connections.

In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply the pointed device or element It must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "multiple" means two or more, unless otherwise clearly defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless expressly stipulated and defined otherwise, the “on” or “under” of the first feature on the second feature may be in direct contact with the first and second features, or indirectly through an intermediary. contact. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , The structure, materials, or characteristics are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the characteristics of the different embodiments or examples described in this specification without contradicting each other.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiment undergoes changes, modifications, substitutions and modifications.

Claims

A dual-motor drive axle box, characterized in that it includes a first motor, a second motor, a first intermediate shaft, a second intermediate shaft, a first input shaft, a second input shaft, a differential, and a first main reduction drive Gear, second main reduction driving gear, main reduction driven gear, first speed driving gear, first speed driven gear, second speed driving gear, second speed driven gear, third speed driving gear, third speed driven gear, fourth speed Driving gear, fourth-speed driven gear, fifth-speed driving gear, fifth-speed driven gear, sixth-speed driving gear, sixth-speed driven gear, direct first-speed driving gear, direct first-speed driven gear, direct second-speed driving gear and Direct second gear driven gear;

The first input shaft and the first intermediate shaft are arranged in parallel; the first input shaft includes a first input shaft right half shaft and a first input shaft left half shaft that can be connected to each other, the first input shaft right The half shaft is connected to the first motor; the direct first-speed driving gear is fixedly arranged on the right half shaft of the first input shaft; the first main reduction driving gear is fixedly arranged on the first input half Shaft left half shaft; the first-speed driven gear, the third-speed driven gear, and the fifth-speed driven gear are sleeved on the left half shaft of the first input shaft; the left half of the first input shaft The shaft is slidably provided with a first gear sleeve and a second gear sleeve; the direct first-speed driving gear is provided with a first coupling tooth, and the first coupling tooth can be connected with the first gear sleeve; the first gear The driven gear is provided with a second coupling tooth, the second coupling tooth can be connected with the second gear sleeve; the third gear driven gear is provided with a third coupling tooth, the third coupling tooth can be connected with the The second gear sleeve is connected; the fifth gear driven gear is provided with a seventh coupling tooth, which can be connected with the first gear sleeve; the direct first gear driven gear, the The first-speed driving gear and the third-speed driving gear are fixedly arranged on the first intermediate shaft; the first main reduction driving gear meshes with the main reduction driven gear; the main reduction driven gear and the differential器连接； Connect to

The second input shaft and the second intermediate shaft are arranged in parallel; the second input shaft includes a second input shaft right half shaft and a second input shaft left half shaft that can be connected to each other, the second input shaft right The half shaft is connected with the second motor; the direct second-speed driven gear is fixedly arranged on the right half shaft of the second input shaft; the second main reduction driving gear is fixedly arranged on the second input Half shaft left half shaft; the second gear driven gear, the fourth gear driven gear and the sixth gear driven gear are sleeved on the left half shaft of the second input shaft; the second input shaft left A third gear sleeve and a fourth gear sleeve are slidably provided on the half shaft; the direct second-speed driving gear is provided with an eighth coupling tooth, which can be connected with the third gear sleeve; The gear driven gear is provided with a fifth coupling tooth, which can be connected with the fourth gear sleeve; the fourth gear driven gear is provided with a sixth coupling tooth, and the sixth coupling tooth can be connected with The fourth gear sleeve is connected; the sixth-speed driven gear is provided with a fourth coupling tooth, and the fourth coupling tooth can be connected with the third gear sleeve; the direct second-speed driven gear, the The second gear driving gear and the fourth gear driving gear are fixedly arranged on the second intermediate shaft; the second main reduction driving gear meshes with the main reduction driven gear.
The dual-motor drive axle box according to claim 1, further comprising a first gear hub fixedly arranged on the left half shaft of the first output shaft; the first tooth is sleeved on the first Gear hub; the first gear sleeve can slide axially, thereby meshing with the first coupling tooth or the seventh coupling tooth.
The dual-motor drive axle box according to any one of claims 1-2, further comprising a second gear hub fixedly arranged on the left half shaft of the first output shaft; the second gear set It is provided on the second gear hub; the second gear sleeve can slide axially so as to mesh with the second coupling tooth or the third coupling tooth.
The dual-motor drive axle box according to any one of claims 1-3, further comprising a third gear hub fixedly arranged on the left half shaft of the second output shaft; the third gear set It is provided on the third gear hub; the third gear sleeve can slide axially so as to mesh with the fourth coupling tooth or the eighth coupling tooth.
The dual-motor drive axle box according to any one of claims 1-4, further comprising a fourth gear hub fixedly arranged on the left half shaft of the second output shaft; the fourth gear set It is provided on the fourth gear hub; the fourth gear sleeve can slide axially so as to mesh with the sixth coupling tooth or the fifth coupling tooth.
The dual-motor drive axle box according to any one of claims 1-5, wherein: the first gear sleeve, the second gear sleeve, the third gear sleeve and the fourth gear sleeve The sliding is driven by the cylinder respectively.