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CN-224197590-U - Single-motor three-gear electric drive bridge with balanced weight distribution and vehicle

CN224197590UCN 224197590 UCN224197590 UCN 224197590UCN-224197590-U

Abstract

The utility model discloses a single-motor three-gear electric drive axle and a vehicle with balanced weight distribution, which belong to the technical field of electric drive systems of new energy automobiles and comprise a drive motor, an input shaft, intermediate shaft assemblies, a transmission gear set, a differential assembly and a half shaft, wherein the intermediate shaft assemblies are arranged on two sides of the axle, the drive motor is connected with the input shaft, the intermediate shaft assemblies and the transmission gear set are respectively arranged on two radial sides of the half shaft, the input shaft selectively transmits power to a second three-gear intermediate shaft or a first intermediate shaft of the intermediate shaft assemblies through the transmission gear set and a gear selection mechanism, and the power of the differential assembly is transmitted to a planet row reduction mechanism through the transmission gear set and is output to a differential shell and is output to drive through the half shaft. According to the utility model, the transmission gears and the shafting are arranged at two sides of the axle to balance weight, the time of the motor running in a high-efficiency interval is increased through three-gear speed change, the energy consumption is reduced, a large reduction ratio is obtained through the planetary gear reducer, the output torque of the wheel end is improved, and the three-gear speed change type speed reducer has practicability and applicability.

Inventors

  • LIU PEIRAN
  • WANG PENGPENG
  • WEI FUCHAO
  • DUAN YUNHONG
  • CAO FEI
  • LIANG HAO
  • YIN ZHIQIANG
  • GAO TAO

Assignees

  • 陕西法士特汽车传动集团有限责任公司

Dates

Publication Date
20260505
Application Date
20250610

Claims (10)

  1. 1. The utility model provides a balanced single motor three-gear electric drive axle of weight distribution which characterized in that, includes driving motor (1), input shaft (2) and arranges jackshaft subassembly, drive gear group, differential mechanism assembly and the semi-axis in the axle both sides, wherein: The intermediate shaft assembly comprises a second intermediate shaft (3) and a first intermediate shaft (15), the driving motor (1) is connected with the input shaft (2), and the second intermediate shaft (3), the first intermediate shaft (15) and the transmission gear sets are respectively arranged at two radial sides of the half shaft so as to balance the weight of two sides of the axle; The input shaft (2) can selectively transmit power to a second-third intermediate shaft (3) or a first-intermediate shaft (15) through a transmission gear set and a gear selection mechanism so as to realize three-gear speed change; The differential assembly comprises a planetary gear set speed reducing mechanism, the half shafts comprise a left half shaft (25) and a right half shaft (21), power of the differential assembly is transmitted to the planetary gear set speed reducing mechanism, and is output to a differential shell (19) through the planetary gear speed reducing mechanism, and is output and driven through the left half shaft (25) and the right half shaft (21).
  2. 2. The weight distribution balanced single-motor three-gear electric drive axle according to claim 1, characterized in that the transmission gear set comprises a primary driving gear (8), a primary driven gear (7), a secondary driving gear (9), a secondary driven gear (10), a first gear driving gear (11), a first gear driven gear (14), a third gear driving gear (6), a third gear driven gear (13), a second gear driving gear (4), a second gear driven gear (29) and a first intermediate shaft output gear (17); The primary driving gear (8) is fixedly connected with the input shaft (2), the secondary driving gear (9), the primary driven gear (7) and the secondary and third-gear intermediate shaft (3) are fixedly connected, the third-gear driving gear (6), the secondary driving gear (4) are sleeved on the secondary and third-gear intermediate shaft (3), the secondary driven gear (10) and the first-gear driving gear (11) form a duplex gear and are sleeved on the left half shaft (25), and the third-gear driven gear (13) and the secondary driven gear (29) are sleeved on the left half shaft (25).
  3. 3. The single-motor three-gear electric drive axle with balanced weight distribution according to claim 2, characterized in that the input shaft (2) selectively transmits power to the second and third-gear intermediate shaft (3) through the meshing of the primary driving gear (8) and the primary driven gear (7), or transmits power to the first-gear intermediate shaft (15) through the meshing of the primary driving gear (8) and the primary driven gear (7), the meshing of the secondary driving gear (9) and the secondary driven gear (10), and the meshing of the first-gear driving gear (11) and the first-gear driven gear (14).
  4. 4. The weight distribution balanced single-motor three-gear electric drive axle according to claim 2, characterized in that the gear selection mechanism comprises a gear sleeve (5), the gear sleeve (5) being keyed to a second-third intermediate shaft (3), the gear sleeve (5) being movable left and right to select engagement with a third gear drive gear (6) or a second gear drive gear (4).
  5. 5. The single-motor three-gear electric drive axle with balanced weight distribution according to claim 2, characterized in that the planetary gear reduction mechanism comprises a sun gear (24), a planet gear (27), a planet carrier (26) and an inner gear ring (28), wherein the sun gear (24) is connected with a transmission gear set, the power is transmitted to the planet carrier (26) through the planet gear (27), and the inner gear ring (28) is fixed.
  6. 6. The weight-distribution balanced single-motor three-speed electrically driven bridge according to claim 5, characterized in that the first-speed intermediate shaft output gear (17) is meshed with a second-speed driven gear (29) for first-speed power transmission.
  7. 7. The single-motor three-gear electric drive axle with balanced weight distribution according to claim 6, characterized in that the second-gear driven gear (29) is connected with the sun gear (24) for the second-gear power transmission, and the third-gear driven gear (13) is connected with the sun gear (24) for the third-gear power transmission.
  8. 8. The single-motor three-gear electric drive axle with balanced weight distribution according to claim 1, characterized in that a intermediate wheel (30) is added between the input shaft (2) and the second and third gear intermediate shaft (3).
  9. 9. The balanced, weight-distribution, single-motor, three-speed electric drive axle of claim 1, further comprising a reserved power take-off interface coupled to the differential assembly or the drive gear set.
  10. 10. A vehicle comprising a balanced weight distribution single motor three-gear electrically driven bridge according to any one of claims 1 to 9.

Description

Single-motor three-gear electric drive bridge with balanced weight distribution and vehicle Technical Field The utility model belongs to the technical field of new energy automobile electric drive systems, and particularly relates to a single-motor three-gear electric drive bridge and a vehicle with balanced weight distribution. Background In the field of commercial vehicles, an electric drive bridge technology is used as a core transmission device of a new energy truck and a tractor, and is undergoing transformation and upgrading from a single speed reducer to multi-gear speed change so as to improve the efficiency, the dynamic property and the economical efficiency of an electric drive system. The existing two-gear speed-changing electric drive bridge product in the market has the problems of oversized axial dimension, uneven weight distribution and the like, and the existing main flow scheme mostly adopts a parallel shaft single-stage or two-stage speed-reducing structure, but has the advantages of compact structure, and has the defects of low efficiency of high-speed working conditions, poor adaptability to complex road conditions and the like. Industry technology pain focuses on how to achieve balance of multi-gear speed change, light weight and reliability, and coordination optimization of a transmission system between space layout and NVH performance. In summary, in the existing electric drive axle multi-gear transmission, the single-motor multi-gear transmission gear sets are intensively arranged on one side of the axle, so that the weight distribution on two sides of the axle is uneven, the control stability of the vehicle is affected, the economy is insufficient due to few gears, and the single-gear or two-gear scheme is difficult to enable the motor to be in a full-working-condition high-efficiency interval for a long time. Disclosure of utility model The utility model provides a single-motor three-gear electric drive axle and a vehicle with balanced weight distribution, and aims to solve the problems that in the existing electric drive axle multi-gear transmission, the weight distribution on two sides of an axle is uneven due to the fact that a gear set of the single-motor multi-gear transmission is intensively arranged on one side of the axle, the control stability of the vehicle is affected, the economy is insufficient due to few gears, and a single-gear or two-gear scheme is difficult to enable a motor to be in an all-working-condition high-efficiency region for a long time. In order to achieve the above purpose, the utility model adopts the following technical scheme: The utility model provides a single-motor three-gear electric drive axle with balanced weight distribution, which comprises a drive motor, an input shaft, and intermediate shaft assemblies, a transmission gear set, a differential assembly and a half shaft which are arranged on two sides of the axle, wherein: The intermediate shaft assembly comprises a second intermediate shaft, a third intermediate shaft and a first intermediate shaft, the driving motor is connected with the input shaft, and the second intermediate shaft, the first intermediate shaft and the transmission gear sets are respectively arranged at two radial sides of the half shaft so as to balance the weight at two sides of the axle; The input shaft can selectively transmit power to a second-third intermediate shaft or a first-third intermediate shaft through the transmission gear set and the gear selection mechanism so as to realize three-gear speed change; The differential assembly comprises a planetary gear set, a differential shell, a left half shaft and a right half shaft, wherein the planetary gear set is arranged on the left half shaft, the planetary gear set is arranged on the right half shaft, and the planetary gear set is connected with the planetary gear set. In some embodiments, the drive gear set includes a primary drive gear, a primary driven gear, a secondary drive gear, a secondary driven gear, a first drive gear, a first driven gear, a third drive gear, a third driven gear, a second drive gear, a second driven gear, and a first countershaft output gear; The first-stage driving gear is fixedly connected with the input shaft, the second-stage driving gear and the first-stage driven gear are fixedly connected with the second-third intermediate shaft, the third-stage driving gear and the second-stage driving gear are sleeved on the second-third intermediate shaft in an empty mode, the second-stage driven gear and the first-stage driving gear form a duplex gear and are sleeved on the left half shaft in an empty mode, and the third-stage driven gear and the second-stage driven gear are sleeved on the left half shaft in an empty mode. Further, the input shaft selectively transmits power to the second and third intermediate shafts through the engagement of the primary driving gear and the primary driven gear, or transmits power to the first intermediate sh