Dual-motor power shaft system arrangement structure and transmission using the same

Abstract

This invention discloses a dual-motor power shaft arrangement structure and a transmission using this structure. By placing the second electric power intervention gear on the intermediate shaft of the first electric power module, the axial dimension of the motor arrangement is reduced, the number of motor intervention gear pairs is decreased, the transmission efficiency of the transmission is improved, and costs are reduced. The first gear and the second electric power intervention gear on the intermediate shaft are respectively arranged at opposite ends of the intermediate shaft, avoiding the risk of excessive load and reduced lifespan on the bearings that would occur if the first gear and the second electric power intervention gear were placed next to the bearings on the same side. This balances the load distribution across the entire intermediate shaft, improving the service life of the intermediate shaft and bearings.

Description

Technical Field

[0001] The present invention relates to the field of transmissions, and in particular to a dual-motor power shaft system arrangement structure and a transmission adopting the structure. Background Art

[0002] With the rapid development of the automobile industry, the number of cars in the market is growing rapidly. Traditional fuel vehicles consume non-renewable energy (such as oil) to provide power, which poses a challenge to energy consumption. Under the dual pressure of environment and energy, the country has put forward higher requirements for automobile emissions. The development of new energy vehicles is imperative. Hybrid vehicles happen to be the product of the transition from traditional fuel vehicles to new energy vehicles. The intervention of the motor basically adopts the insertion of intermediate gears to achieve power transmission, but the space of the automobile power cabin is limited, and the power layout of the hybrid system has become a thorny problem. Summary of the invention

[0003] The present invention discloses a dual-motor power shaft system arrangement structure, in which a motor intervention gear is arranged on the intermediate shaft of a first electric power module, thereby reducing the axial size of the motor arrangement, reducing the motor intervention gear pair, improving the transmission efficiency of the transmission, and reducing the cost.

[0004] The present invention also discloses a transmission using the dual-motor power shaft system arrangement structure, which reduces the axial size of the motor arrangement, reduces the number of motors involved in the gear pair, improves the transmission efficiency of the transmission, and reduces costs.

[0005] The dual-motor power shaft system arrangement structure disclosed in the present invention includes:

[0006] A first electric power module, a first electric power input shaft, an input shaft gear, an intermediate shaft, an intermediate shaft gear, and an intermediate shaft constant meshing gear; the input shaft gear is fixed on the first electric power input shaft, the intermediate shaft gear is arranged on the intermediate shaft, and the intermediate shaft constant meshing gear is fixed on the intermediate shaft;

[0007] A second electric power module, a second electric power output shaft gear, a second electric power intermediate shaft, a second electric power intermediate gear, and a second electric power intervention gear; the second electric power intermediate gear is fixed on the second electric power intermediate shaft; the second electric power intervention gear is fixedly arranged on the intermediate shaft and arranged side by side with the intermediate shaft constant meshing gear;

[0008] Differential Final reduction gear and differential;

[0009] The power of the first electric power module is transmitted to the differential through the input shaft gear on the first electric power input shaft, the intermediate shaft gear on the intermediate shaft, the intermediate shaft constant meshing gear, and the differential main reduction gear;

[0010] The power of the second electric power module is transmitted to the differential through the second electric power output shaft gear, the second electric power intermediate gear on the second electric power intermediate shaft, the second electric power intervention gear, the intermediate shaft constant meshing gear, and the differential main reduction gear.

[0011] Furthermore, the input shaft gear includes: input shaft first gear gear, input shaft fourth gear gear, input shaft third gear gear and input shaft second gear gear; the input shaft first gear gear, input shaft fourth gear gear, input shaft third gear gear and input shaft second gear gear are fixedly arranged in sequence on the first electric power input shaft.

[0012] Furthermore, the intermediate shaft gear comprises: an intermediate shaft first gear, a first synchronizer, an intermediate shaft fourth gear, an intermediate shaft third gear, a second synchronizer and an intermediate shaft second gear; the intermediate shaft first gear, the first synchronizer, the intermediate shaft fourth gear, the intermediate shaft third gear, the second synchronizer and the intermediate shaft second gear are arranged in sequence on the intermediate shaft; the input shaft first gear is meshed with the intermediate shaft first gear; the input shaft fourth gear is meshed with the intermediate shaft fourth gear; the input shaft third gear is meshed with the intermediate shaft third gear; the input shaft second gear is meshed with the intermediate shaft second gear; the intermediate shaft first gear, the intermediate shaft fourth gear, the intermediate shaft third gear and the intermediate shaft second gear are loosely mounted on the intermediate shaft, the first synchronizer switches between the intermediate shaft first gear and the intermediate shaft fourth gear, and the second synchronizer switches between the intermediate shaft third gear and the intermediate shaft second gear.

[0013] Furthermore, the intermediate shaft first gear and the second electric power intervention gear are respectively arranged at two ends of the intermediate shaft.

[0014] Furthermore, the second electric power module is a second power motor.

[0015] Furthermore, the first electric power module is a first power motor.

[0016] The invention also discloses a transmission adopting the dual-motor power shaft system arrangement structure.

[0017] The beneficial technical effects of the present invention are:

[0018] 1) The second electric power intervention gear is inserted behind the constant meshing teeth of the intermediate shaft, which increases the axial arrangement space of the second electric power module. This not only solves the problem that the axial size of the second electric power module is too large to complete the shaft arrangement in a limited space, but also reduces the gear pairs, improves the transmission efficiency of the transmission, and reduces the cost of the transmission;

[0019] 2) The first gear of the intermediate shaft and the second electric power intervention gear are arranged at the two ends of the intermediate shaft respectively, avoiding the risk of placing the first gear of the intermediate shaft and the second electric power intervention gear next to the bearing on the same side, which would cause the bearing to bear too much load and reduce its life. In this way, the load distribution on the entire intermediate shaft is balanced, and the service life of the intermediate shaft and bearing is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the dual-motor power shaft system arrangement in the prior art;

[0021] Figure 2 This is a structural diagram of the dual-motor power shaft system layout of the present invention. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, the prior art dual-motor power shaft system arrangement structure includes:

[0023] Motor 01, motor output shaft gear 02, motor intermediate gear 03, motor first transition gear 04 and motor second transition gear 05; the power of motor 01 is output through motor output shaft gear 02, motor intermediate gear 03, motor second transition gear 05 and motor first transition gear 04;

[0024] The first intermediate shaft 026, the motor intervention gear 06, the first intermediate shaft five-speed gear 07, the first synchronizer 08, the reverse gear 09 and the first intermediate shaft constant meshing gear 010; the motor intervention gear 06, the first intermediate shaft five-speed gear 07, the first synchronizer 08, the reverse gear 09 and the first intermediate shaft constant meshing gear 010 are arranged on the first intermediate shaft 026 in sequence; wherein the motor intervention gear 06 and the first intermediate shaft constant meshing gear 010 are fixed on the first intermediate shaft 026, the first intermediate shaft five-speed gear 07 and the reverse gear 09 are loosely mounted on the first intermediate shaft 026, and the motor intervention gear 06 is meshed with the motor first transition gear 04;

[0025] Input shaft 027, input shaft fourth gear 011, input shaft third gear 012, input shaft fifth gear 013, input shaft second gear 014, input shaft first gear 015; the input shaft fourth gear 011, input shaft third gear 012, input shaft fifth gear 013, input shaft second gear 014 and input shaft first gear 015 are fixedly arranged in sequence on the input shaft 027;

[0026] The second intermediate shaft 028, the second intermediate shaft fourth gear 016, the second synchronizer 017, the second intermediate shaft third gear 018, the second intermediate shaft second gear 019, the third synchronizer 020, the second intermediate shaft first gear 021, and the second intermediate shaft constant meshing gear 022 are arranged on the second intermediate shaft 028 in sequence; wherein the second intermediate shaft constant meshing gear 022 is fixed on the second intermediate shaft 028; the second intermediate shaft fourth gear 016 is meshed with the input shaft second gear 014, and the second intermediate shaft third gear 01 8 is meshed with the input shaft third gear 012, the second intermediate shaft second gear 019 is meshed with the input shaft second gear 014, and the second intermediate shaft first gear 021 is meshed with the input shaft first gear 015; the second intermediate shaft constant meshing gear 022 is fixedly arranged on the second intermediate shaft 028; the second intermediate shaft fourth gear 016 and the second intermediate shaft third gear 018 are arranged on the second intermediate shaft 028 without sleeves, and the second synchronizer 017 switches between the second intermediate shaft fourth gear 016 and the second intermediate shaft third gear 018; the second intermediate shaft second gear 019 and the second intermediate shaft first gear 021 are arranged on the second intermediate shaft 028 without sleeves, and the third synchronizer 020 switches between the second intermediate shaft second gear 019 and the second intermediate shaft first gear 021;

[0027] The differential main reduction gear 023 and the differential 024; the first intermediate shaft constant meshing gear 010 and the second intermediate shaft constant meshing gear 022 are respectively meshed with the differential main reduction gear 023, thereby providing power to the differential 024.

[0028] The dual-motor power shaft system arrangement structure of the prior art is relatively easy to arrange the shaft system when the axial size of motor 01 is small; but when the transmission motor is involved in the gear pair and is used more frequently, the axial size of motor 01 begins to increase, and the transmission design becomes more complicated, which not only reduces the transmission efficiency of the entire transmission, but also increases the cost of the transmission.

[0029] In addition, the second intermediate shaft first gear 021 is generally arranged on the housing bearing side close to the engine end, and together with the second intermediate shaft constant meshing gear 022, it will increase the bearing load here and cause system instability.

[0030] like Figure 2 As shown, the dual-motor power shaft system arrangement structure of the present invention includes:

[0031] The first power motor module 8, the first power input shaft 19, the input shaft gear, the intermediate shaft 20, the intermediate shaft gear and the intermediate shaft constant meshing gear 15; the input shaft gear includes: the input shaft first gear 4, the input shaft fourth gear 5, the input shaft third gear 6 and the input shaft second gear 7; the intermediate shaft gear includes: the intermediate shaft first gear 9, the first synchronizer 10, the intermediate shaft fourth gear 11, the intermediate shaft third gear 12, the second synchronizer 13 and the intermediate shaft second gear 14;

[0032] The input shaft gears fixedly arranged on the first power input shaft are: input shaft first gear 4, input shaft fourth gear 5, input shaft third gear 6, input shaft second gear 7; the intermediate shaft gears arranged on the intermediate shaft are: intermediate shaft first gear 9, first synchronizer 10, intermediate shaft fourth gear 11, intermediate shaft third gear 12, second synchronizer 13 and intermediate shaft second gear 14; the intermediate shaft first gear 9, intermediate shaft fourth gear 11, intermediate shaft third gear 12, intermediate shaft second gear 14 are loosely mounted on the intermediate shaft 20 in sequence.

[0033] The input shaft first gear 4 meshes with the intermediate shaft first gear 9; the input shaft fourth gear 5 meshes with the intermediate shaft fourth gear 11; the input shaft third gear 6 meshes with the intermediate shaft third gear 12; the input shaft second gear 7 meshes with the intermediate shaft second gear 14; the first synchronizer 10 switches between the intermediate shaft first gear and the intermediate shaft fourth gear; the second synchronizer 13 switches between the intermediate shaft third gear and the intermediate shaft second gear.

[0034] The second electric power motor module 1, the second power output shaft gear 2, the second electric power intermediate shaft 21, the second electric power intermediate gear 3, the second electric power intervention gear 16; the second electric power intermediate gear 3 is fixed on the second electric power intermediate shaft 21; the second electric power intervention gear 16 is fixedly arranged on the intermediate shaft 20 and arranged side by side with the intermediate shaft constant meshing gear 15; the intermediate shaft first gear 9 and the second electric power intervention gear 16 are respectively arranged at the two ends of the intermediate shaft.

[0035] Differential main reduction gear 17 and differential 18;

[0036] The power of the first electric power motor module is transmitted to the differential 18 through the input shaft gear on the first electric power input shaft, the intermediate shaft gear on the intermediate shaft, the intermediate shaft constant meshing gear 15, and the differential main reduction gear 17.

[0037] The power of the second electric power motor module is transmitted to the differential 18 through the second electric power output shaft gear 2, the second electric power intermediate gear 3, the second electric power intervention gear 16, the intermediate shaft constant meshing gear 15, and the differential main reduction gear 17.

[0038] The invention also discloses a transmission adopting the dual-motor power shaft system arrangement structure.

[0039] Due to the large axial dimension of the motor, the shaft system cannot be arranged in a limited space. Therefore, a second electric power intervention gear 16 is inserted behind the intermediate shaft constant meshing gear 15, thereby increasing the axial arrangement space of the second electric power motor. This not only solves the problem of insufficient space, but also reduces multiple gear pairs, thereby improving the transmission efficiency of the transmission and reducing the cost of the transmission.

[0040] Since the second electric power intervention gear 16 is arranged next to the intermediate shaft constant mesh gear 15, if the intermediate shaft first gear 9 is arranged next to the intermediate shaft constant mesh gear 15, the load borne by the bearing is too large, the service life of the bearing is reduced, and there is a risk. The intermediate shaft first gear 9 and the second electric power intervention gear 16 are arranged at the two ends of the intermediate shaft respectively, which can balance the load distribution on the entire shaft and increase the service life of the intermediate shaft and bearings.

Claims

1. Dual motor power shaft system layout structure, Features: include, A first electric power module (8), a first electric power input shaft (19), an input shaft gear, an intermediate shaft (20), an intermediate shaft gear and an intermediate shaft constant mesh gear (15); the input shaft gear is fixed to the first electric power input shaft (19), the intermediate shaft gear is arranged with an idler sleeve on the intermediate shaft, and the intermediate shaft constant mesh gear (15) is fixed to the intermediate shaft (20); The input shaft gear positions include: an input shaft first gear (4), an input shaft fourth gear (5), an input shaft third gear (6) and an input shaft second gear (7); the input shaft first gear, the input shaft fourth gear, the input shaft third gear and the input shaft second gear are fixedly arranged in sequence on the first electric power input shaft (19); The intermediate shaft gear position gears include: an intermediate shaft first gear (9), a first synchronizer (10), an intermediate shaft fourth gear (11), an intermediate shaft third gear (12), a second synchronizer (13) and an intermediate shaft second gear (14); the intermediate shaft first gear, the first synchronizer, the intermediate shaft fourth gear, the intermediate shaft third gear, the second synchronizer and the intermediate shaft second gear are arranged on the intermediate shaft (20) in sequence; the input shaft first gear is meshed with the intermediate shaft first gear; the input shaft fourth gear is meshed with the intermediate shaft fourth gear; the input shaft third gear is meshed with the intermediate shaft third gear; the input shaft second gear is meshed with the intermediate shaft second gear; the intermediate shaft first gear, the intermediate shaft fourth gear, the intermediate shaft third gear and the intermediate shaft second gear are loosely mounted on the intermediate shaft, the first synchronizer switches between the intermediate shaft first gear and the intermediate shaft fourth gear, and the second synchronizer switches between the intermediate shaft third gear and the intermediate shaft second gear; A second electric power module (1), a second electric power output shaft gear (2), a second electric power intermediate shaft (21), a second electric power intermediate gear (3), and a second electric power intervention gear (16); the second electric power intermediate gear (3) is fixed on the second electric power intermediate shaft (21); the second electric power intervention gear (16) is fixedly arranged on the intermediate shaft (20) and arranged side by side with the intermediate shaft constant meshing gear (15); Differential main reduction gear (17) and differential (18); The power of the first electric power module (8) is transmitted to the differential through the input shaft gear on the first electric power input shaft (19), the intermediate shaft gear on the intermediate shaft, the intermediate shaft constant meshing gear, and the differential main reduction gear; The power of the second electric power module (1) is transmitted to the differential through the second electric power output shaft gear, the second electric power intermediate gear on the second electric power intermediate shaft, the second electric power intervention gear, the intermediate shaft constant meshing gear, and the differential main reduction gear.

2. The dual-motor power shaft arrangement structure according to claim 1, Features: The intermediate shaft first gear and the second electric power intervention gear (16) are arranged at two ends of the intermediate shaft respectively.

3. The dual-motor power shaft arrangement structure as claimed in claim 1, Features: The second electric power module (1) is a second power motor.

4. The dual-motor power shaft arrangement structure as claimed in claim 1, Features: The first electric power module (8) is a first power motor.

5. A transmission adopting the dual-motor power shaft system arrangement structure as claimed in any one of claims 1 to 4.

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