CN-121973623-A - Transmission system applied to multi-axle heavy off-road vehicle

Abstract

The application provides a transmission system applied to a multi-axle heavy off-road vehicle, and relates to the field of vehicles. The transmission system comprises an axle assembly, a transfer case and a transmission mechanism, wherein the axle assembly comprises a first axle unit, a second axle unit, a third axle unit and a fourth axle unit, the first axle unit, the second axle unit, the third axle unit and the fourth axle unit respectively comprise a left wheel transmission structure and a right wheel transmission structure which are oppositely arranged at two sides of a vehicle, the transfer case comprises a case body, and an inter-wheel differential mechanism, a left front inter-axle differential mechanism, a left rear inter-axle differential mechanism, a right front inter-axle differential mechanism and a right rear inter-axle differential mechanism which are arranged in the case body, and the left wheel transmission structure of the third axle unit is in transmission connection with the left wheel transmission structure of the fourth axle unit, and the right wheel transmission structure of the third axle unit is in transmission connection with the right wheel transmission structure of the fourth axle unit through transmission shafts. The transmission system can flexibly adjust the rotation speed difference between each axle and each wheel, greatly reduce the tire skid and abrasion, and effectively improve the complex road surface trafficability and running stability of the vehicle under the off-road working condition.

Inventors

• SHI HUI
• DONG YI
• NIE BIN
• LV LIANG
• LIANG WENLI
• CAI LEI
• LI SIYUAN

Assignees

• 中国人民解放军63963部队

Dates

Publication Date

20260505

Application Date

20260319

Claims (7)

1. 1. A transmission system for a multi-axle heavy off-road vehicle, comprising: The axle assembly comprises a first axle unit (2), a second axle unit (3), a third axle unit (6) and a fourth axle unit (9) which are sequentially arranged along the direction from the head to the tail of the vehicle, wherein the first axle unit (2), the second axle unit (3), the third axle unit (6) and the fourth axle unit (9) comprise a left wheel transmission structure and a right wheel transmission structure which are oppositely arranged at two sides of the vehicle; The transfer case (5) comprises a case body, and an inter-wheel differential (8), a left front inter-axle differential (4), a left rear inter-axle differential (7), a right front inter-axle differential (17) and a right rear inter-axle differential (18) which are arranged in the case body; the input end of the inter-wheel differential mechanism (8) is used for being connected with a gearbox (12), two output ends of the inter-wheel differential mechanism (8) are respectively connected with the input end of the left rear inter-axle differential mechanism (7) and the input end of the right rear inter-axle differential mechanism (18), two output ends of the left rear inter-axle differential mechanism (7) are respectively connected with the input end of the left front inter-axle differential mechanism (4) and a left wheel transmission structure of the three-axle unit (6), and two output ends of the right rear inter-axle differential mechanism (18) are respectively connected with the input end of the right front inter-axle differential mechanism (17) and a right wheel transmission structure of the three-axle unit (6); two output ends of the left front inter-axle differential mechanism (4) are respectively connected with a left wheel transmission structure of the first axle unit (2) and a left wheel transmission structure of the second axle unit (3), and two output ends of the right front inter-axle differential mechanism (17) are respectively connected with a right wheel transmission structure of the first axle unit (2) and a right wheel transmission structure of the second axle unit (3); The left wheel side transmission structure of the three-axle unit (6) is in transmission connection with the left wheel side transmission structure of the four-axle unit (9), and the right wheel side transmission structure of the three-axle unit (6) is in transmission connection with the right wheel side transmission structure of the four-axle unit (9) through a transmission shaft (10).
2. 2. A transmission system for a multi-axle heavy off-road vehicle according to claim 1, characterized in that the left and right wheel drive arrangements each comprise a mutually cooperating wheel-side ball cage drive shaft (13), steering knuckle assembly (14), hub assembly (15) and wheel-side reducer assembly (16).
3. 3. A transmission system for a multi-axle heavy off-road vehicle according to claim 2, characterized in that the input ends of the one-axle unit (2) and the four-axle unit (9) are each provided with a first transmission case (1).
4. 4. A transmission system for a multi-axle heavy off-road vehicle according to claim 2, characterized in that the output of the three-axle unit (6) is provided with a second transmission case (11).
5. 5. A transmission system for a multi-axle heavy off-road vehicle according to claim 1, wherein a unlatching means is also provided in the housing.
6. 6. The transmission system for a multi-axle heavy off-road vehicle of claim 1, wherein the housing is further provided with an oil temperature sensor interface, an oil pressure sensor interface, an oil level sensor interface, a wheel speed sensor interface, an oil sensor interface, and a vehicle speed sensor interface.
7. 7. A transmission system for a multi-axle heavy off-road vehicle according to claim 1, characterized in that the gearbox (12) is a 7-speed AT gearbox (12).

Description

Transmission system applied to multi-axle heavy off-road vehicle Technical Field The invention relates to the technical field of vehicles, in particular to a transmission system applied to a multi-axle heavy off-road vehicle. Background The multi-axle heavy off-road vehicle is an important type of heavy off-road vehicle and is characterized by being provided with more than two axles, and has large bearing capacity and complex terrain traveling potential by means of a multi-axle structure, so that the multi-axle heavy off-road vehicle is widely applied to the fields of special operation, heavy material off-road transportation, complex working condition engineering operation and the like, and the vehicle has strict technical requirements on space suitability, power transmission efficiency and complex pavement adaptability of a transmission system. The transmission system is a core power transmission unit of the multi-axle heavy off-road vehicle, is an assembly for transmitting engine output power to a series of parts of each driving wheel, can realize key running functions of starting, speed changing, speed reducing, differential speed and the like of the vehicle, has a structural form, a layout design and performance matching, directly determines the dynamic property and the fuel economy of the vehicle, is a core factor for influencing the space utilization rate, the running stability and the complex road surface trafficability of the whole vehicle, and is a key system for realizing the overall performance of the multi-axle heavy off-road vehicle. However, the transmission system of the existing multi-axle heavy off-road vehicle still has significant technical defects in practical application, the core is low in space utilization rate and poor in complex road surface trafficability, and the problem is particularly prominent under off-road working conditions. Disclosure of Invention The invention aims to provide a transmission system applied to a multi-axle heavy off-road vehicle, and aims to solve the technical problems in the background technology. Embodiments of the present invention are implemented as follows: The embodiment of the application provides a transmission system applied to a multi-axle heavy off-road vehicle, which comprises an axle assembly, a transmission system and a transmission system, wherein the axle assembly comprises a first axle unit, a second axle unit, a third axle unit and a fourth axle unit which are sequentially arranged along the direction from the front end to the rear end of the vehicle, and the first axle unit, the second axle unit, the third axle unit and the fourth axle unit respectively comprise a left wheel transmission structure and a right wheel transmission structure which are oppositely arranged at two sides of the vehicle; the transfer case comprises a case body, an inter-wheel differential, a left front inter-axle differential, a left rear inter-axle differential, a right front inter-axle differential and a right rear inter-axle differential which are arranged in the case body, wherein the input end of the inter-wheel differential is connected with a gearbox, the two output ends of the inter-wheel differential are respectively connected with the input end of the left rear inter-axle differential and the input end of the right rear inter-axle differential, the two output ends of the left rear inter-axle differential are respectively connected with the input end of the left front inter-axle differential and a left wheel transmission structure of the three-axle unit, the two output ends of the right rear inter-axle differential are respectively connected with the input end of the right front inter-axle differential and a right wheel transmission structure of the three-axle unit, the two output ends of the left front inter-axle differential are respectively connected with a left wheel transmission structure of the one-axle unit and a left wheel transmission structure of the two-axle unit, the two output ends of the right front inter-axle differential are respectively connected with a left wheel transmission structure of the one-axle unit and a right-axle transmission structure of the two-axle unit, and the two-axle transmission structure of the two-axle unit are respectively connected with the left wheel transmission structure of the two-axle unit and the three-axle transmission structure of the one-axle unit And the right wheel side transmission structure of the three-axle unit is in transmission connection with the right wheel side transmission structure of the four-axle unit through a transmission shaft. Further, based on the foregoing, the left wheel side transmission structure and the right wheel side transmission structure each include a wheel side ball cage transmission shaft, a knuckle assembly, a hub assembly and a wheel side reducer assembly that are mutually matched. Further, based on the foregoing scheme, the input ends of the one-bridge unit and the four-b