Single-motor double-intermediate-shaft heavy truck electric drive axle power assembly and vehicle

Abstract

The utility model relates to an electric drive axle power assembly, in particular to a single-motor double-intermediate-shaft heavy truck electric drive axle power assembly and a vehicle. The power assembly comprises an input shaft, an input gear, an input driven gear, a normally meshed driving gear, a second-gear driving gear, an intermediate shaft, an idle gear, a hollow shaft, a normally meshed driven gear, a second-gear driven gear, a first intermediate shaft driven gear, a first intermediate shaft, a first intermediate shaft driving gear, a main reduction gear, a first sliding sleeve, a first-gear gear and a second sliding sleeve. A second intermediate shaft driven gear, a second intermediate shaft and a second intermediate shaft driving gear; the input shaft, the intermediate shafts, the hollow shaft, the first intermediate shaft and the second intermediate shaft are arranged in parallel. Due to the adoption of the structural arrangement of full parallel shafts, the manufacturing cost is low, and the system transmission efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electric drive axle power assembly and vehicle, specifically to a kind of single motor double intermediate shaft heavy truck electric drive axle power assembly and vehicle using the electric drive axle power assembly. BACKGROUND

[0002] With the vigorous development of new energy vehicle technology, in the field of commercial vehicles, electric drive axle becomes the standard power unit of new energy vehicle model launched by major domestic and foreign manufacturers due to its compact structure, high transmission efficiency and light weight.

[0003] There are mainly two configurations on the market: single motor electric drive axle and double motor electric drive axle. Single motor electric drive axle has more advantages in cost and weight, while double motor electric drive axle has greater output torque. In order to improve the output torque of single motor electric drive axle to meet the application conditions of heavy truck commercial vehicles, some products use wheel end planetary gear to reduce speed to obtain higher output torque, but the disadvantage is that it reduces the transmission efficiency of the system. At the same time, if it runs at high speed for a long time, the wheel end will overheat and leak oil. Some products use single intermediate shaft transmission power for the speed reduction mechanism. Once the output torque exceeds 40,000 Nm, the main reduction gear stress is very large, and tooth breakage is likely to occur. The above factors limit the development and application of single motor electric drive axle.

[0004] Chinese patent CN118912180A discloses an electric drive axle single motor three-gear planetary wheel type speed reducer assembly, which includes an input shaft connected with a driving motor, a first intermediate shaft parallel to the input shaft, a central shaft parallel to the first intermediate shaft, and a second intermediate shaft parallel to the central shaft. The input shaft is provided with a first gear. The first intermediate shaft is sequentially provided with a second gear, a third gear, and the second gear can be engaged with the first gear. The central shaft is sequentially provided with a tenth gear, a second gear shifting structure, a seventh gear, a fifth gear, and a fourth gear, and the fourth gear can be engaged with the third gear. The second intermediate shaft is sequentially provided with a ninth gear, an eighth gear, a first gear shifting structure, and a sixth gear, and the sixth gear can be engaged with the fifth gear, the eighth gear can be engaged with the seventh gear, and the ninth gear can be engaged with the tenth gear. However, since the patent uses a wheel end planetary gear reduction structure, it still has the technical problem of low transmission efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the technical problem of low transmission efficiency of existing single motor electric drive axle power assembly, and provides a single motor double intermediate shaft heavy truck electric drive axle power assembly and vehicle.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] The electric drive axle power assembly of the utility model realizes large torque output at the wheel end by reasonable arrangement of the transmission system and adoption of output stage double intermediate shaft structure.

[0008] A single-motor double-intermediate axle heavy truck electric drive axle power assembly, which is characterized in that:

[0009] The power assembly comprises an input shaft, an input gear, an input driven gear, a constantly meshing driving gear, a two-gear driving gear, an intermediate shaft, an intermediate gear, a hollow shaft, a constantly meshing driven gear, a two-gear driven gear, a first intermediate shaft driven gear, a first intermediate shaft, a first intermediate shaft driving gear, a main reduction gear, a first sliding sleeve, a one-gear gear, a second sliding sleeve, a second intermediate shaft driven gear, a second intermediate shaft and a second intermediate shaft driving gear;

[0010] The input shaft, the intermediate shaft, the hollow shaft, the first intermediate shaft and the second intermediate shaft are arranged in parallel with each other;

[0011] The right end of the input shaft is connected with the output end of the driving motor of the vehicle, and the input gear is mounted on the input shaft;

[0012] The input driven gear, the constantly meshing driving gear and the two-gear driving gear are mounted in sequence on the intermediate shaft in the right-to-left direction, the input driven gear is engaged with the input gear, the constantly meshing driving gear is engaged with the constantly meshing driven gear, and the two-gear driving gear is engaged with the intermediate gear;

[0013] The hollow shaft is sleeved on the left half axle of the vehicle, the intermediate gear and the one-gear gear are respectively sleeved on the hollow shaft, the constantly meshing driven gear and the first sliding sleeve are respectively mounted on the hollow shaft, the constantly meshing driven gear is located between the intermediate gear and the one-gear gear, and the first sliding sleeve is located on the right side of the one-gear gear;

[0014] The first intermediate shaft driven gear and the first intermediate shaft driving gear are respectively mounted on the first intermediate shaft, the two-gear driven gear is sleeved on the second intermediate shaft and engaged with the intermediate gear, and the second sliding sleeve, the second intermediate shaft driven gear and the second intermediate shaft driving gear are mounted in sequence on the second intermediate shaft in the left-to-right direction;

[0015] The one-gear gear is engaged with the first intermediate shaft driven gear and the second intermediate shaft driven gear respectively, the main reduction gear is engaged with the first intermediate shaft driving gear and the second intermediate shaft driving gear respectively and mounted on the differential of the vehicle, and connected with the right half axle through the differential of the vehicle;

[0016] The left end of the first sliding sleeve is used for engaging with the right end of the one-gear gear when the one-gear is engaged, and the right end is used for engaging with the left end of the main reduction gear when the three-gear is engaged, and the left end of the second sliding sleeve is used for engaging with the right end of the two-gear driven gear when the two-gear is engaged.

[0017] Further, the input gear is mounted on the left end of the input shaft;

[0018] The input driven gear and the second-gear driving gear are respectively installed on the two ends of the intermediate shaft, and the always-engaged driving gear is installed on the middle position of the intermediate shaft;

[0019] The first-intermediate-shaft driven gear and the first-intermediate-shaft driving gear are respectively installed on the two ends of the first intermediate shaft;

[0020] The second-gear driven gear is sleeved on the left end of the second intermediate shaft, and the second-intermediate-shaft driving gear is installed on the right end of the second intermediate shaft.

[0021] The utility model discloses still provided another single motor double intermediate axle heavy truck electric drive bridge power assembly, its special feature lies in:

[0022] The utility model relates to an input shaft, input gear, input driven gear, always -engaged driving gear, second -gear driving gear, intermediate shaft, hollow shaft, second -gear driven gear, first -intermediate-shaft driven gear, first intermediate shaft, first -intermediate-shaft driving gear, main reduction gear, first sliding sleeve, gear, second sliding sleeve, second -intermediate-shaft driven gear, second intermediate shaft, second -intermediate-shaft driving gear and transmission shaft are included.

[0023] The input shaft, intermediate shaft, hollow shaft, first intermediate shaft, second intermediate shaft and transmission shaft are arranged in parallel with each other;

[0024] The right end of the input shaft is connected with the output end of the driving motor of the vehicle, and the input gear is installed on the input shaft;

[0025] The input driven gear, always -engaged driving gear and second -gear driving gear are sequentially installed on the intermediate shaft along the right to left direction, the input driven gear is engaged with the input gear, the always -engaged driving gear is engaged with the always -engaged driven gear, and the second -gear driving gear is engaged with the intermediate gear;

[0026] The hollow shaft is sleeved on the left half shaft of the vehicle, the intermediate gear and the gear are respectively sleeved on the hollow shaft, the always -engaged driven gear and the first sliding sleeve are respectively installed on the hollow shaft, and the always -engaged driven gear is located between the intermediate gear and the gear, and the first sliding sleeve is located on the right side of the gear;

[0027] The first-intermediate-shaft driven gear and the first-intermediate-shaft driving gear are respectively installed on the first intermediate shaft;

[0028] The transmission shaft and the second intermediate shaft are coaxially arranged, the second-gear driven gear and the second sliding sleeve are respectively installed on the transmission shaft, and the second-gear driven gear is engaged with the intermediate gear, the second-intermediate-shaft driven gear and the second-intermediate-shaft driving gear are respectively installed on the second intermediate shaft, and the second-intermediate-shaft driven gear is sleeved on the transmission shaft;

[0029] The first gear is engaged with the first intermediate shaft driven gear and the second intermediate shaft driven gear, and the main reduction gear is engaged with the first intermediate shaft driving gear and the second intermediate shaft driving gear, and is installed on the differential of the vehicle and connected with the right half shaft through the differential of the vehicle;

[0030] The left end of the first sliding sleeve is used for engaging with the right end of the first gear when the first gear is engaged, and the right end is used for engaging with the left end of the main reduction gear when the third gear is engaged; the right end of the second sliding sleeve is used for engaging with the left end of the second intermediate shaft driven gear when the second gear is engaged.

[0031] Further, the input gear is installed on the left end of the input shaft;

[0032] The input driven gear and the second gear driving gear are installed on the two ends of the intermediate shaft respectively, and the always engaged driving gear is installed on the middle position of the intermediate shaft;

[0033] The first intermediate shaft driven gear and the first intermediate shaft driving gear are installed on the two ends of the first intermediate shaft respectively;

[0034] The second gear driven gear is installed on the left end of the transmission shaft, the second sliding sleeve is installed on the transmission shaft close to the right end, the second intermediate shaft driven gear and the second intermediate shaft driving gear are installed on the two ends of the second intermediate shaft respectively, and the second intermediate shaft driven gear is sleeved on the right end of the transmission shaft.

[0035] The utility model further provides third single motor double intermediate shaft heavy truck electric drive bridge power assembly, its special feature lies in:

[0036] The utility model discloses a single motor double intermediate shaft heavy truck electric drive bridge power assembly, which comprises an input shaft, an input gear, an input driven gear, an always engaged driving gear, a second gear driving gear, an intermediate shaft, an intermediate gear, a hollow shaft, a always engaged driven gear, a second gear driven gear, a first intermediate shaft driven gear, a first intermediate shaft, a first intermediate shaft driving gear, a main reduction gear, a first sliding sleeve, a first gear, a second sliding sleeve, a second intermediate shaft driven gear, a second intermediate shaft and a second intermediate shaft driving gear.

[0037] The input shaft, the intermediate shaft, the hollow shaft, the first intermediate shaft and the second intermediate shaft are arranged in parallel with each other;

[0038] The right end of the input shaft is connected with the output end of the driving motor of the vehicle, and the input gear is installed on the input shaft;

[0039] The input driven gear, the always engaged driving gear and the second gear driving gear are sequentially installed on the left half of the intermediate shaft in the right-to-left direction; the input driven gear is engaged with the input gear, the always engaged driving gear is engaged with the always engaged driven gear, and the second gear driving gear is engaged with the intermediate gear;

[0040] The hollow shaft is sleeved on the left half shaft of the vehicle, the intermediate gear and the one-gear gear are respectively sleeved on the hollow shaft, the constant engagement driven gear and the first sliding sleeve are respectively installed on the hollow shaft, and the constant engagement driven gear is located between the intermediate gear and the one-gear gear, and the first sliding sleeve is located on the right side of the one-gear gear;

[0041] The first intermediate shaft is a hollow shaft, and is sleeved on the right half of the intermediate shaft; the first intermediate shaft driven gear and the first intermediate shaft driving gear are respectively installed on the first intermediate shaft; the two-gear driven gear is sleeved on the second intermediate shaft and is engaged with the intermediate gear; the second sliding sleeve, the second intermediate shaft driven gear and the second intermediate shaft driving gear are sequentially installed on the second intermediate shaft in the left-to-right direction;

[0042] The one-gear gear is engaged with the first intermediate shaft driven gear and the second intermediate shaft driven gear respectively, the main reduction gear is engaged with the first intermediate shaft driving gear and the second intermediate shaft driving gear respectively, and is installed on the differential of the vehicle and is connected with the right half shaft through the differential of the vehicle;

[0043] The left end of the first sliding sleeve is used for engaging with the right end of the one-gear gear when the one-gear is engaged, and the right end is used for engaging with the left end of the main reduction gear when the three-gear is engaged; the left end of the second sliding sleeve is used for engaging with the right end of the two-gear driven gear when the two-gear is engaged.

[0044] Further, the input gear is installed on the left end of the input shaft;

[0045] The input driven gear is installed on the middle end, and the constant engagement driving gear and the two-gear driving gear are sequentially installed on the intermediate shaft in the direction away from the input driven gear;

[0046] The first intermediate shaft driven gear and the first intermediate shaft driving gear are respectively installed on the two ends of the first intermediate shaft;

[0047] The two-gear driven gear is sleeved on the left end of the second intermediate shaft, and the second intermediate shaft driving gear is installed on the right end of the second intermediate shaft.

[0048] The utility model further provides fourth single motor double intermediate axle heavy truck electric drive bridge power assembly, and its special feature lies in:

[0049] The utility model discloses a single motor double intermediate axle heavy truck electric drive bridge power assembly, which comprises an input shaft, an input gear, an input driven gear, a constant engagement driving gear, a two-gear driving gear, an intermediate shaft, an intermediate gear, a hollow shaft, a constant engagement driven gear, a two-gear driven gear, a first intermediate shaft driven gear, a first intermediate shaft, a first intermediate shaft driving gear, a main reduction gear, a first sliding sleeve, a one-gear gear, a second sliding sleeve, a second intermediate shaft driven gear, a second intermediate shaft, a second intermediate shaft driving gear, a power takeoff gear, a third sliding sleeve and an output shaft.

[0050] The input shaft, the intermediate shaft, the hollow shaft, the first intermediate shaft, the second intermediate shaft and the output shaft are arranged in parallel;

[0051] The right end of the input shaft is connected with the output end of the driving motor of the vehicle, and the input gear is mounted on the input shaft;

[0052] The input driven gear, the always-engaged driving gear and the second-gear driving gear are mounted on the intermediate shaft in sequence from right to left, the input driven gear is engaged with the input gear, the always-engaged driving gear is engaged with the always-engaged driven gear, and the second-gear driving gear is engaged with the intermediate gear;

[0053] The hollow shaft is sleeved on the left half axle of the vehicle, the intermediate gear and the first-gear gear are respectively sleeved on the hollow shaft, the always-engaged driven gear and the first sliding sleeve are respectively mounted on the hollow shaft, and the always-engaged driven gear is located between the intermediate gear and the first-gear gear, and the first sliding sleeve is located at the right side of the first-gear gear;

[0054] The first intermediate shaft driven gear and the first intermediate shaft driving gear are respectively mounted on the first intermediate shaft, the second-gear driven gear is sleeved on the second intermediate shaft and engaged with the intermediate gear, and the second sliding sleeve, the second intermediate shaft driven gear and the second intermediate shaft driving gear are mounted on the second intermediate shaft in sequence from left to right;

[0055] The first-gear gear is engaged with the first intermediate shaft driven gear and the second intermediate shaft driven gear respectively, the main reduction gear is engaged with the first intermediate shaft driving gear and the second intermediate shaft driving gear respectively and mounted on the differential of the vehicle, and connected with the right half axle through the differential of the vehicle;

[0056] The left end of the first sliding sleeve is used for engaging with the right end of the first-gear gear when the first gear is engaged, and the right end is used for engaging with the left end of the main reduction gear when the third gear is engaged, and the left end of the second sliding sleeve is used for engaging with the right end of the second-gear driven gear when the second gear is engaged;

[0057] The power take-off gear is sleeved on the output shaft and engaged with the second-gear driven gear, the right end of the output shaft is used for connecting with the power take-off device of the vehicle, and the sliding sleeve is mounted on the output shaft and the left end thereof is used for engaging with the right end of the power take-off gear when the power is taken off.

[0058] Further, the input gear is mounted on the left end of the input shaft;

[0059] The input driven gear and the second-gear driving gear are respectively mounted on the two ends of the intermediate shaft, and the always-engaged driving gear is mounted at the middle position of the intermediate shaft;

[0060] The first intermediate shaft driven gear and the first intermediate shaft driving gear are respectively mounted on the two ends of the first intermediate shaft;

[0061] The second intermediate shaft driving gear is installed on the right end of the second intermediate shaft.

[0062] Meanwhile, the utility model also provides a vehicle, including drive motor, differential, left half axle, right half axle, left wheel, right wheel and electric drive axle power assembly. Or including differential, left half axle, right half axle, left wheel, right wheel, electric drive axle power assembly and power takeoff device, the both ends of left half axle are connected with the left end of differential and left wheel respectively, and the both ends of right half axle are connected with the right end of differential and right wheel respectively.

[0063] The power takeoff device is a water pump or an oil pump, the both ends of the left half axle are connected with the left end of the differential and the left wheel respectively, and the both ends of the right half axle are connected with the right end of the differential and the right wheel respectively, the drive motor transmits power to the differential through the electric drive axle power assembly, and then the differential drives the left wheel and the right wheel to rotate through the left half axle and the right half axle.

[0064] The special feature is that the electric drive axle power assembly is the single-motor double-intermediate axle heavy truck electric drive axle power assembly.

[0065] The utility model has the advantages of:

[0066] 1. The utility model adopts a full-parallel shaft structure arrangement, has low manufacturing cost and high system transmission efficiency.

[0067] 2. The utility model adopts a double-intermediate axle symmetrical structure in the output stage, which jointly bears the load, significantly improves the stress state of the main reduction gear, and has high reliability when the electric drive axle power assembly output torque exceeds 40000Nm.

[0068] 3. The utility model has three gears, has better power economy and multi-scene applicability in the heavy commercial vehicle field. DRAWINGS

[0069] Figure 1 It is a structural schematic diagram of the utility model embodiment one.

[0070] Figure 2 It is a one-gear transmission route schematic diagram in the utility model embodiment one.

[0071] Figure 3 It is a two-gear transmission route schematic diagram in the utility model embodiment one.

[0072] Figure 4 It is a three-gear transmission route schematic diagram in the utility model embodiment one.

[0073] Figure 5 It is a structural schematic diagram of the utility model embodiment two.

[0074] Figure 6 This is a structural schematic diagram of Embodiment 3 of this utility model;

[0075] Figure 7 This is a structural schematic diagram of Embodiment 4 of this utility model.

[0076] In the diagram: 1-Drive motor; 2-Input shaft; 3-Input gear; 4-Input driven gear; 5-Constant mesh drive gear; 6-Second gear drive gear; 7-Intermediate shaft; 8-Intermediate wheel; 9-Hollow shaft; 10-Constant mesh driven gear; 11-Second gear driven gear; 12-First intermediate shaft driven gear; 13-First intermediate shaft; 14-First intermediate shaft drive gear; 15-Main reduction gear; 16-First sliding sleeve; 17-First gear; 18-Second sliding sleeve; 19-Second intermediate shaft driven gear; 20-Second intermediate shaft; 21-Second intermediate shaft drive gear; 22-Differential gear; 23-Drive shaft; 24-Power take-off gear; 25-Third sliding sleeve; 26-Output shaft; 27-Power take-off device; 28-Left half shaft; 29-Right half shaft; 30-Left wheel; 31-Right wheel. Detailed Implementation

[0077] To make the objectives, advantages, and features of this utility model clearer, the following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a single-motor, dual-intermediate-axle heavy-duty truck electric drive axle powertrain and vehicle according to this utility model. The advantages and features of this utility model will become clearer according to the following specific embodiments.

[0078] Example 1

[0079] like Figure 1 As shown, this utility model discloses a single-motor, dual-intermediate-shaft heavy-duty truck electric drive axle powertrain, which... Figure 1 With the left and right directions as a reference, the output shaft of the vehicle's drive motor 1 is connected to the right end of the input shaft 2. The input gear 3 is installed on the left end of the input shaft 20. The input driven gear 4, the constant mesh drive gear 5, and the second gear drive gear 6 are installed sequentially from right to left on the intermediate shaft 7. The input driven gear 4 and the second gear drive gear 6 are installed at both ends of the intermediate shaft 7, and the constant mesh drive gear 5 is installed in the middle position of the intermediate shaft 7. The input driven gear 4 meshes with the input gear 3, the constant mesh drive gear 5 meshes with the constant mesh driven gear 10, and the second gear drive gear 6 meshes with the intermediate wheel 8.

[0080] The hollow shaft 9 is loosely fitted on the left half shaft 28 of the vehicle, and its length is less than the length of the left half shaft 28. The constantly meshed driven gear 10 and the first sliding sleeve 16 are respectively installed on the hollow shaft 16. The intermediate wheel 8 and the first gear 17 are loosely fitted on the hollow shaft 9. The constantly meshed driven gear 10 is located between the intermediate wheel 8 and the first gear 17. The first sliding sleeve 16 is located at the right end of the hollow shaft.

[0081] The first intermediate shaft 13 is connected with the first intermediate shaft driven gear 12 and the first intermediate shaft driving gear 14 at two ends respectively, the second intermediate shaft 20 is sequentially fixed with the second sliding sleeve 18, the second intermediate shaft driven gear 19 and the second intermediate shaft driving gear 21 from left to right, the second intermediate shaft driving gear 21 is located at the right end of the second intermediate shaft 20, the two-gear driven gear 11 is sleeved on the left end of the second intermediate shaft 20 and is engaged with the intermediate gear 8, the second sliding sleeve 18 is located on the side of the second intermediate shaft 20 close to the two-gear driven gear 11, and the second intermediate shaft driven gear 19 is located on the side of the second intermediate shaft 20 close to the second intermediate shaft driving gear 21.

[0082] The one-gear driving gear 17 is engaged with the first intermediate shaft driven gear 12 and the second intermediate shaft driven gear 19, the main reduction gear 15 is engaged with the first intermediate shaft driving gear 14 and the second intermediate shaft driving gear 21, the main reduction gear 15 is connected with the differential 22, the left half shaft 28 is connected with the differential 22 and the left wheel 29 at two ends respectively, and the right half shaft 30 is connected with the differential 22 and the right wheel 31 at two ends respectively.

[0083] The input shaft 2, the intermediate shaft 7, the hollow shaft 9, the first intermediate shaft 13 and the second intermediate shaft 20 are arranged in parallel.

[0084] The output stage of the utility model adopts double intermediate shaft symmetrical structure, not only guarantees higher transmission efficiency, also promotes the torque output capacity of power assembly, makes single motor electric drive axle has stronger cost competitiveness.

[0085] As shown in the figure, Figure 2 The one-gear power transmission route is as follows: the first sliding sleeve 16 moves to the left and is combined with the one-gear driving gear 17, power from the driving motor 1 passes through the input shaft 2, the input gear 3, the input driven gear 4, the intermediate shaft 7, the always-engaged driving gear 5, the always-engaged driven gear 10, the hollow shaft 9, the first sliding sleeve 16, the one-gear driving gear 17, a part of power passes through the first intermediate shaft driven gear 12, the first intermediate shaft 13, the first intermediate shaft driving gear 14, the main reduction gear 15, the differential 22, another part of power passes through the second intermediate shaft driven gear 19, the second intermediate shaft 20, the second intermediate shaft driving gear 21, the main reduction gear 15, the differential 22, then passes through the left half shaft 28 and the right half shaft 29 from the differential 22 respectively, power reaches the left wheel 30 and the right wheel 31, and drives the vehicle to run.

[0086] As shown in the figure, Figure 3As shown, the power transmission route of the second gear is: the second sliding sleeve 18 moves left and combines with the second driven gear 11, the power from the driving motor 1 passes through the input shaft 2, the input gear 3, the input driven gear 4, the intermediate shaft 7, the second driving gear 6, the intermediate gear 8, the second driven gear 11, the second sliding sleeve 18, the second intermediate shaft 20, a part of the power passes through the second intermediate shaft driven gear 19, the first gear 17, the first intermediate shaft driven gear 12, the first intermediate shaft 13, the first intermediate shaft driving gear 14, the main reduction gear 15, the differential 22, and the other part of the power passes through the second intermediate shaft driving gear 21, the main reduction gear 15, the differential 22, and then respectively passes through the left half shaft 28 and the right half shaft 29 from the differential 22, and reaches the left wheel 30 and the right wheel 31 to drive the vehicle to run.

[0087] As shown in the figure, Figure 4 the power transmission route of the third gear is: the first sliding sleeve 16 moves right and combines with the main reduction gear 15, the power from the driving motor 1 passes through the input shaft 2, the input gear 3, the input driven gear 4, the intermediate shaft 7, the always meshing driving gear 5, the always meshing driven gear 10, the hollow shaft 9, the first sliding sleeve 16, the main reduction gear 15, and the differential 22, and then respectively passes through the left half shaft 28 and the right half shaft 29 from the differential 22, and reaches the left wheel 30 and the right wheel 31 to drive the vehicle to run.

[0088] When the first sliding sleeve 16 does not combine with the first gear 17 or the main reduction gear 15, and the second sliding sleeve 18 does not combine with the second driven gear 11, the electric drive axle assembly is in the neutral state. When in the neutral state, the driving motor 1 stops working.

[0089] Example Two

[0090] As shown in the figure, Figure 5 the difference between this embodiment and example one is that a transmission shaft 23 is further arranged, the transmission shaft 23 is coaxially arranged with the second intermediate shaft 20, the second driven gear 11 and the second sliding sleeve 18 are fixed on the transmission shaft 23, the second intermediate shaft driven gear 19 and the second intermediate shaft driving gear 21 are fixed on the second intermediate shaft 20, and at the same time, the second intermediate shaft driven gear 19 is sleeved on the transmission shaft 23, so as to connect the transmission shaft 23 and the second intermediate shaft 20 at the shaft head. The second gear power transmission is realized by the connection of the right movement of the second sliding sleeve 18 and the second intermediate shaft driven gear 19. The rest of the structure of this embodiment is the same as that of example one.

[0091] Example Three

[0092] As shown in the figure, Figure 6As shown, the difference between this embodiment and Embodiment 1 is that the first intermediate shaft 13 is machined as a hollow shaft and loosely fitted onto the right half of the intermediate shaft 7, thereby shortening the axial dimension of the drive axle assembly by sharing the support bearings at both ends of the intermediate shaft 7. The rest of the structure of this embodiment is the same as that of Embodiment 1.

[0093] Example 4

[0094] like Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that a power take-off gear 24, a third sliding sleeve 25, and an output shaft 26 are also provided.

[0095] In this embodiment, the power take-off gear 24 is loosely fitted on the output shaft 26 and meshes with the second driven gear 11. The third sliding sleeve 25 is fixed on the output shaft 26, and the right end of the output shaft 26 is connected to the vehicle's power take-off device 27. The engagement of the third sliding sleeve 25 with the power take-off gear 24 enables power to be supplied to the vehicle's power take-off device (such as a water pump or oil pump) in both parked and driving states. The remaining structure of this embodiment is the same as in Embodiment 1.

Claims

1. A single-motor double-intermediate shaft heavy truck electric drive axle power assembly, characterized in that: it comprises an input shaft (2), an input gear (3), an input driven gear (4), a constantly meshing driving gear (5), a two-gear driving gear (6), an intermediate shaft (7), an intermediate gear (8), a hollow shaft (9), a constantly meshing driven gear (10), a two-gear driven gear (11), a first intermediate shaft driven gear (12), a first intermediate shaft (13), a first intermediate shaft driving gear (14), a main reduction gear (15), a first sliding sleeve (16), a one-gear gear (17), a second sliding sleeve (18), a second intermediate shaft driven gear (19), a second intermediate shaft (20), and a second intermediate shaft driving gear (21); the input shaft (2), the intermediate shaft (7), the hollow shaft (9), the first intermediate shaft (13), and the second intermediate shaft (20) are arranged in parallel with each other; the right end of the input shaft (2) is connected with the output end of a drive motor (1) of a vehicle, and the input gear (3) is installed on the input shaft (2); the input driven gear (4), the constantly meshing driving gear (5), and the two-gear driving gear (6) are sequentially installed on the intermediate shaft (7) in a right-to-left direction, the input driven gear (4) is engaged with the input gear (3), the constantly meshing driving gear (5) is engaged with the constantly meshing driven gear (10), and the two-gear driving gear (6) is engaged with the intermediate gear (8); the hollow shaft (9) is sleeved on a left half shaft (28) of the vehicle, the intermediate gear (8) and the one-gear gear (17) are respectively sleeved on the hollow shaft (9), the constantly meshing driven gear (10) and the first sliding sleeve (16) are respectively installed on the hollow shaft (9), the constantly meshing driven gear (10) is located between the intermediate gear (8) and the one-gear gear (17), and the first sliding sleeve (16) is located on the right side of the one-gear gear (17); the first intermediate shaft driven gear (12) and the first intermediate shaft driving gear (14) are respectively installed on the first intermediate shaft (13); the two-gear driven gear (11) is sleeved on the second intermediate shaft (20) and engaged with the intermediate gear (8); the second sliding sleeve (18), the second intermediate shaft driven gear (19), and the second intermediate shaft driving gear (21) are sequentially installed on the second intermediate shaft (20) in a left-to-right direction; the one-gear gear (17) is engaged with the first intermediate shaft driven gear (12) and the second intermediate shaft driven gear (19) respectively, the main reduction gear (15) is engaged with the first intermediate shaft driving gear (14) and the second intermediate shaft driving gear (21) respectively, and is installed on a differential (22) of the vehicle and connected with a right half shaft (29) through the differential (22) of the vehicle; the left end of the first sliding sleeve (16) is used for engaging with the right end of the one-gear gear (17) when the one-gear gear (17) is engaged, and the right end is used for engaging with the left end of the main reduction gear (15) when the three-gear gear (17) is engaged; the left end of the second sliding sleeve (18) is used for engaging with the right end of the two-gear driven gear (11) when the two-gear gear (17) is engaged. 2.The single-motor double-intermediate shaft heavy truck electric drive axle power assembly according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ The input gear (3) is installed on the left end of the input shaft (2); The input driven gear (4) and the two-gear driving gear (6) are respectively installed on the two ends of the intermediate shaft (7), and the always-engaged driving gear (5) is installed on the middle of the intermediate shaft (7); The first intermediate shaft driven gear (12) and the first intermediate shaft driving gear (14) are respectively installed on the two ends of the first intermediate shaft (13); The two-gear driven gear (11) is sleeved on the left end of the second intermediate shaft (20), and the second intermediate shaft driving gear (21) is installed on the right end of the second intermediate shaft (20).

3. A single-motor double-intermediate shaft heavy truck electric drive axle power assembly, characterized in that: It comprises an input shaft (2), an input gear (3), an input driven gear (4), an always-engaged driving gear (5), a two-gear driving gear (6), an intermediate shaft (7), an intermediate gear (8), a hollow shaft (9), an always-engaged driven gear (10), a two-gear driven gear (11), a first intermediate shaft driven gear (12), a first intermediate shaft (13), a first intermediate shaft driving gear (14), a main reduction gear (15), a first sliding sleeve (16), a one-gear (17), a second sliding sleeve (18), a second intermediate shaft driven gear (19), a second intermediate shaft (20), a second intermediate shaft driving gear (21) and a transmission shaft (23); The input shaft (2), the intermediate shaft (7), the hollow shaft (9), the first intermediate shaft (13) and the second intermediate shaft (20) are arranged in parallel with each other; The right end of the input shaft (2) is connected with the output end of the driving motor (1) of the vehicle, and the input gear (3) is installed on the input shaft (2); The input driven gear (4), the always-engaged driving gear (5) and the two-gear driving gear (6) are sequentially installed on the intermediate shaft (7) from right to left, the input driven gear (4) is engaged with the input gear (3), the always-engaged driving gear (5) is engaged with the always-engaged driven gear (10), and the two-gear driving gear (6) is engaged with the intermediate gear (8); The hollow shaft (9) is sleeved on the left half shaft (28) of the vehicle, the intermediate gear (8) and the one-gear (17) are respectively sleeved on the hollow shaft (9), the always-engaged driven gear (10) and the first sliding sleeve (16) are respectively installed on the hollow shaft (9), and the always-engaged driven gear (10) is located between the intermediate gear (8) and the one-gear (17), and the first sliding sleeve (16) is located on the right side of the one-gear (17); The first intermediate shaft driven gear (12) and the first intermediate shaft driving gear (14) are respectively installed on the first intermediate shaft (13); The transmission shaft (23) and the second intermediate shaft (20) are coaxially arranged, the two-gear driven gear (11) and the second sliding sleeve (18) are respectively installed on the transmission shaft (23), and the two-gear driven gear (11) is engaged with the intermediate gear (8); the second intermediate shaft driven gear (19) and the second intermediate shaft driving gear (21) are respectively installed on the second intermediate shaft (20), and the second intermediate shaft driven gear (19) is sleeved on the right end of the transmission shaft (23). The first gear (17) is engaged with the first intermediate shaft driven gear (12) and the second intermediate shaft driven gear (19) respectively, the main reduction gear (15) is engaged with the first intermediate shaft driving gear (14) and the second intermediate shaft driving gear (21) respectively, and is installed on the differential (22) of the vehicle, and is connected with the right half shaft (29) through the differential (22) of the vehicle; The left end of the first sliding sleeve (16) is used for engaging with the right end of the first gear (17) when the first gear is engaged, and the right end is used for engaging with the left end of the main reduction gear (15) when the third gear is engaged; the right end of the second sliding sleeve (18) is used for engaging with the left end of the second intermediate shaft driven gear (19) when the second gear is engaged.

4. The single motor double intermediate shaft heavy truck electric drive axle power assembly according to claim 3, characterized in that: The input gear (3) is installed on the left end of the input shaft (2); The input driven gear (4) and the second gear driving gear (6) are installed on both ends of the intermediate shaft (7) respectively, and the always engaged driving gear (5) is installed at the middle position of the intermediate shaft (7); The first intermediate shaft driven gear (12) and the first intermediate shaft driving gear (14) are installed on both ends of the first intermediate shaft (13) respectively; The second gear driven gear (11) is installed on the left end of the transmission shaft (23), and the second sliding sleeve (18) is installed at a position close to the right end of the transmission shaft (23); the second intermediate shaft driven gear (19) and the second intermediate shaft driving gear (21) are installed on both ends of the second intermediate shaft (20) respectively.

5. A single motor double intermediate shaft heavy truck electric drive axle power assembly, characterized in that: It comprises an input shaft (2), an input gear (3), an input driven gear (4), an always engaged driving gear (5), a second gear driving gear (6), an intermediate shaft (7), an intermediate gear (8), a hollow shaft (9), an always engaged driven gear (10), a second gear driven gear (11), a first intermediate shaft driven gear (12), a first intermediate shaft (13), a first intermediate shaft driving gear (14), a main reduction gear (15), a first sliding sleeve (16), a first gear (17), a second sliding sleeve (18), a second intermediate shaft driven gear (19), a second intermediate shaft (20) and a second intermediate shaft driving gear (21); The input shaft (2), the intermediate shaft (7), the hollow shaft (9), the first intermediate shaft (13) and the second intermediate shaft (20) are arranged in parallel with each other; The right end of the input shaft (2) is connected with the output end of the driving motor (1) of the vehicle, and the input gear (3) is installed on the input shaft (2); The input driven gear (4), the always engaged driving gear (5) and the second gear driving gear (6) are sequentially installed on the left half of the intermediate shaft (7) in the right-to-left direction; the input driven gear (4) is engaged with the input gear (3), the always engaged driving gear (5) is engaged with the always engaged driven gear (10), and the second gear driving gear (6) is engaged with the intermediate gear (8); The hollow shaft (9) is sleeved on the left half shaft (28) of the vehicle, the intermediate gear (8) and the one-gear gear (17) are sleeved on the hollow shaft (9) respectively, the always-engaged driven gear (10) and the first sliding sleeve (16) are installed on the hollow shaft (9) respectively, and the always-engaged driven gear (10) is located between the intermediate gear (8) and the one-gear gear (17), and the first sliding sleeve (16) is located on the right side of the one-gear gear (17); The first intermediate shaft (13) is a hollow structure, and is sleeved on the right half of the intermediate shaft (7); the first intermediate shaft driven gear (12) and the first intermediate shaft driving gear (14) are installed on the first intermediate shaft (13) respectively; the two-gear driven gear (11) is sleeved on the second intermediate shaft (20) and is engaged with the intermediate gear (8); the second sliding sleeve (18), the second intermediate shaft driven gear (19) and the second intermediate shaft driving gear (21) are installed on the second intermediate shaft (20) in sequence from left to right; The one-gear gear (17) is engaged with the first intermediate shaft driven gear (12) and the second intermediate shaft driven gear (19) respectively, the main reduction gear (15) is engaged with the first intermediate shaft driving gear (14) and the second intermediate shaft driving gear (21) respectively, and is installed on the differential (22) of the vehicle, and is connected with the right half shaft (29) through the differential (22) of the vehicle; The left end of the first sliding sleeve (16) is used for engaging with the right end of the one-gear gear (17) when the one-gear is engaged, and the right end is used for engaging with the left end of the main reduction gear (15) when the three-gear is engaged; the left end of the second sliding sleeve (18) is used for engaging with the right end of the two-gear driven gear (11) when the two-gear is engaged.

6. The single-motor double-intermediate shaft heavy truck electric drive axle power assembly according to claim 5, characterized in that: The input gear (3) is installed on the left end of the input shaft (2); The two-gear driving gear (6) is installed on the left end of the intermediate shaft (7); The first intermediate shaft driven gear (12) and the first intermediate shaft driving gear (14) are installed on the two ends of the first intermediate shaft (13) respectively; The two-gear driven gear (11) is sleeved on the left end of the second intermediate shaft (20), and the second intermediate shaft driving gear (21) is installed on the right end of the second intermediate shaft (20).

7. A single-motor double-intermediate shaft heavy truck electric drive axle power assembly, characterized in that: It comprises an input shaft (2), an input gear (3), an input driven gear (4), an always-engaged driving gear (5), a two-gear driving gear (6), an intermediate shaft (7), an intermediate gear (8), a hollow shaft (9), an always-engaged driven gear (10), a two-gear driven gear (11), a first intermediate shaft driven gear (12), a first intermediate shaft (13), a first intermediate shaft driving gear (14), a main reduction gear (15), a first sliding sleeve (16), a one-gear gear (17), a second sliding sleeve (18), a second intermediate shaft driven gear (19), a second intermediate shaft (20), a second intermediate shaft driving gear (21), a power take-off gear (24), a third sliding sleeve (25) and an output shaft (26). The input shaft (2), the intermediate shaft (7), the hollow shaft (9), the first intermediate shaft (13), the second intermediate shaft (20) and the output shaft (26) are arranged in parallel with each other; The right end of the input shaft (2) is connected with the output end of the driving motor (1) of the vehicle, and the input gear (3) is installed on the input shaft (2); The input driven gear (4), the always meshing driving gear (5) and the two-gear driving gear (6) are installed in sequence on the intermediate shaft (7) in the right-to-left direction, the input driven gear (4) is engaged with the input gear (3), the always meshing driving gear (5) is engaged with the always meshing driven gear (10), and the two-gear driving gear (6) is engaged with the intermediate gear (8); The hollow shaft (9) is sleeved on the left half shaft (28) of the vehicle, the intermediate gear (8) and the first gear (17) are respectively sleeved on the hollow shaft (9), the always meshing driven gear (10) and the first sliding sleeve (16) are respectively installed on the hollow shaft (9), and the always meshing driven gear (10) is located between the intermediate gear (8) and the first gear (17), and the first sliding sleeve (16) is located on the right side of the first gear (17); The first intermediate shaft driven gear (12) and the first intermediate shaft driving gear (14) are respectively installed on the first intermediate shaft (13); the two-gear driven gear (11) is sleeved on the second intermediate shaft (20) and engaged with the intermediate gear (8); the second sliding sleeve (18), the second intermediate shaft driven gear (19) and the second intermediate shaft driving gear (21) are installed in sequence on the second intermediate shaft (20) in the left-to-right direction; The first gear (17) is engaged with the first intermediate shaft driven gear (12) and the second intermediate shaft driven gear (19) respectively, the main reduction gear (15) is engaged with the first intermediate shaft driving gear (14) and the second intermediate shaft driving gear (21) respectively, and is installed on the differential (22) of the vehicle, and is connected with the right half shaft (29) through the differential (22) of the vehicle; The left end of the first sliding sleeve (16) is used for engaging with the right end of the first gear (17) when the first gear is engaged, and the right end is used for engaging with the left end of the main reduction gear (15) when the third gear is engaged; the left end of the second sliding sleeve (18) is used for engaging with the right end of the two-gear driven gear (11) when the second gear is engaged; The power take-off gear (24) is sleeved on the output shaft (26) and engaged with the two-gear driven gear (11); the right end of the output shaft (26) is used for connecting with the power take-off device (27) of the vehicle; the sliding sleeve is installed on the output shaft (26), and the left end is used for engaging with the right end of the power take-off gear (24) when the power is taken off.

8. The single-motor double-intermediate shaft heavy truck electric drive axle power assembly according to claim 7, characterized in that: The input gear (3) is installed on the left end of the input shaft (2); The input driven gear (4) and the two-gear driving gear (6) are respectively installed on the two ends of the intermediate shaft (7), and the always meshing driving gear (5) is installed at the middle position of the intermediate shaft (7); The first intermediate shaft driven gear (12) and the first intermediate shaft driving gear (14) are respectively installed on the two ends of the first intermediate shaft (13); The second intermediate shaft (20) is provided with a second intermediate shaft driving gear (21) and a second intermediate shaft driven gear (11). 9.A vehicle comprising a driving motor (1), a differential (22), a left half shaft (28), a right half shaft (29), a left wheel (30), a right wheel (31) and an electric drive axle power assembly; The left half shaft (28) is connected to the left end of the differential (22) and the left wheel (30) respectively, and the right half shaft (29) is connected to the right end of the differential (22) and the right wheel (31) respectively; The driving motor (1) transmits power to the differential (22) through the electric drive axle power assembly, and then drives the left wheel (30) and the right wheel (31) to rotate through the differential (22) and the left half shaft (28) and the right half shaft (29); Characterized in that: The electric drive axle power assembly is the single-motor double-intermediate shaft heavy truck electric drive axle power assembly of claim 1 or 2; Or, the electric drive axle power assembly is the single-motor double-intermediate shaft heavy truck electric drive axle power assembly of claim 3 or 4; Or, the electric drive axle power assembly is the single-motor double-intermediate shaft heavy truck electric drive axle power assembly of claim 5 or 6. 10.A vehicle comprising a driving motor (1), a differential (22), a left half shaft (28), a right half shaft (29), a left wheel (30), a right wheel (31), an electric drive axle power assembly and a power take-off device (27); The left half shaft (28) is connected to the left end of the differential (22) and the left wheel (30) respectively, and the right half shaft (29) is connected to the right end of the differential (22) and the right wheel (31) respectively; The driving motor (1) transmits power to the differential (22) through the electric drive axle power assembly, and then drives the left wheel (30) and the right wheel (31) to rotate through the differential (22) and the left half shaft (28) and the right half shaft (29); The power take-off device (27) is a water pump or an oil pump; Characterized in that: The electric drive axle power assembly is the single-motor double-intermediate shaft heavy truck electric drive axle power assembly of claim 7 or 8.

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