Parallel shaft type power take-off mechanism for electric drive axle

Abstract

The utility model relates to a parallel shaft type power take-off mechanism for an electric drive axle. The parallel shaft type power take-off mechanism comprises a motor assembly and a gearbox assembly. Shells of the motor assembly and the gearbox assembly are integrally arranged; the motor assembly comprises a motor shaft; the gearbox assembly comprises an input shaft connected with the output end of the motor shaft, a driving gear and an output shaft are arranged on the input shaft, and a driven gear meshed with the driving gear is arranged on the output shaft. The motor assembly, the electric control assembly and the gearbox assembly are designed in an integrated mode, the shell of the motor assembly and the shell of the gearbox assembly are arranged in an integrated mode, power can be independently provided, the power take-off device is modularly arranged on a commercial vehicle, the disadvantage that a power take-off mechanism is arranged through a gearbox in the prior art is overcome, and the power take-off device is simple in structure and easy to install and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of commercial vehicles, in particular to a parallel-axis power take-off mechanism for an electric drive axle. Background Art

[0002] In traditional commercial vehicle fields such as muck trucks, garbage trucks, dump trucks and other sub-sectors, the power take-off mechanisms often take power from the vehicle gearbox. As the commercial vehicle electric drive technology route gradually matures, the power route gradually becomes shorter and develops to the stage of central integrated electric drive axle. The independent gearbox has withdrawn from the existing power transmission route, and how the actuator takes power has become an urgent problem to be solved. Utility Model Content

[0003] The purpose of the utility model is to provide a parallel shaft type power take-off mechanism for an electric drive axle in view of the deficiencies in the prior art.

[0004] The utility model is realized by adopting the following technical solutions:

[0005] A parallel-axis power take-off mechanism for an electric drive axle comprises a motor assembly and a gearbox assembly; the housings of the motor assembly and the gearbox assembly are integrally arranged, the motor assembly comprises a motor shaft; the gearbox assembly comprises: an input shaft connected to the output end of the motor shaft, a driving gear arranged on the input shaft, an output shaft, and a driven gear meshing with the driving gear arranged on the output shaft.

[0006] Preferably, the motor assembly further includes: a motor housing, a stator core and a rotor connected to the motor shaft, and a motor outer water jacket covering the stator core; a plurality of liquid cooling grooves are arranged on the motor outer water jacket, and the motor housing is press-fitted outside the motor outer water jacket.

[0007] Preferably, the motor assembly further includes: oil seal 1 and oil seal 2 located near the motor shaft; a plurality of oil drain grooves are provided on the motor housing, and the bottom ends of the oil drain grooves are provided between oil seal 1 and oil seal 2.

[0008] Preferably, the motor housing adopts an envelope structure, a support is provided at the bottom of the motor housing, a high-voltage wire clamp is provided at the side of the motor housing, and reinforcing ribs are provided on the side of the motor housing extending to the support, and are integrated.

[0009] Preferably, the input shaft of the gearbox assembly is a stepped hollow shaft with an internal spline arranged inside; the input shaft is spline-connected to the motor shaft; and both sides of the driving gear are arranged on the input shaft through bearings.

[0010] Preferably, the output shaft of the gearbox assembly is a stepped shaft, and an external spline is provided on the output end; both sides of the passive gear are arranged at the shoulders of the output shaft through bearings.

[0011] Preferably, the gearbox assembly includes: a bearing cover bolted to the motor housing, a sealing assembly arranged in the bearing cover, a groove arranged on the bearing cover, a dust cover arranged on the groove, and a flange arranged at the output end of the output shaft; the flange is spline-connected to the output shaft.

[0012] Preferably, it also includes an electric control assembly; the electric control assembly is connected to the motor housing through bolts.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects:

[0014] 1. The motor housing and the gearbox housing are integrated into one design. The motor housing adopts an envelope structure design, which removes redundant materials, compresses space, saves costs, and reduces product weight.

[0015] 2. The integrated design of the motor outer water jacket and the motor housing, the motor is assembled into the motor housing, which protects the motor and reduces the risk of collision of the motor core components.

[0016] 3. Reinforcement ribs are set on the motor housing to improve the supporting stiffness and strength of the motor housing and the support and reduce local stress concentration.

[0017] 4. The integrated design of the motor assembly, electronic control assembly and gearbox assembly has an independent modular configuration with a simple structure, which is easy to install and maintain, and eliminates the problem of difficult layout of the power take-off mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a cross-sectional schematic diagram of a parallel-axis power take-off mechanism for an electric drive axle of the utility model;

[0020] Figure 2 This is a schematic diagram of the oil drain tank structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the overall structure of the parallel shaft type power take-off mechanism for the electric drive axle of the utility model.

[0022] Description of reference numerals:

[0023] 1. Motor housing; 2. Stator core; 3. Rotor; 4. Motor shaft; 5. Motor outer water jacket; 6. Electronic control assembly; 11. Output shaft ball bearing 2; 12. Passive gear; 13. Output shaft ball bearing 1; 14. Dust cover; 15. Flange; 16. Output shaft; 17. Flange nut; 18. Hexagon head bolt; 19. Seal assembly; 20. Bearing cover; 21. Hexagonal flange bearing with toothed bolt; 22. Driving gear; 23. Input shaft; 24. Input shaft ball bearing 2; 25. Oil seal 1; 26. Oil seal 2; 27. Oil drain groove; 28. Adjustment gasket; 29. ​​Input shaft ball bearing 1; 31. Support; 32. High-voltage wire clamp; 33. Reinforcement rib. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the description of the utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0025] like Figure 1-3 As shown: a parallel-axis power take-off mechanism for an electric drive axle, comprising a motor assembly and a gearbox assembly; the housings of the motor assembly and the gearbox assembly are integrated, and the motor assembly comprises a motor shaft 4; the gearbox assembly comprises: an input shaft 23 connected to the output end of the motor shaft 4, a driving gear 22 is arranged on the input shaft 23, an output shaft 16, and a passive gear 12 meshing with the driving gear 22 is arranged on the output shaft 16; the shaft system of the gearbox assembly is arranged in parallel, and a parallel-axis power take-off is formed with the motor shaft of the motor assembly, which has the advantages of compact structure and saving axial space; it can provide power independently and be modularly configured on commercial vehicles, getting rid of the disadvantage of relying on the gearbox to set the power take-off mechanism in the past, and has a simple structure and is easy to install and maintain.

[0026] The motor assembly also includes: a motor housing 1, a stator core 2 and a rotor 3 connected to a motor shaft 4, and a motor outer water jacket 5 covering the stator core 2; a plurality of liquid cooling grooves are provided on the motor outer water jacket 5, and the liquid cooling grooves are used for conveying coolant; the motor housing 1 is press-fitted on the outside of the motor outer water jacket 5; the motor outer water jacket and the motor housing are integrated in a design, and the motor is assembled into the motor housing, which protects the motor and reduces the risk of collision of the core components of the motor.

[0027] The motor assembly also includes: an oil seal 1 25 and an oil seal 2 26 located near the motor shaft 4; a plurality of oil drain grooves 27 are provided on the motor housing 1, and the bottom of the oil drain groove 27 is provided between the oil seal 1 25 and the oil seal 2 26; the oil drain groove 27 improves reliability.

[0028] The motor housing 1 adopts an envelope structure, a support 31 is provided at the bottom of the motor housing 1, a high-voltage wire clamp 32 is provided on the side of the motor housing 1, and reinforcing ribs 33 are provided on the side of the motor housing 1 extending to the support 31, and an integrated arrangement is adopted; the reinforcing ribs 33 improve the supporting stiffness and strength of the housing and the base, and reduce local stress concentration; the motor housing 1 and the gearbox housing are designed as an integrated whole, and the motor housing adopts an envelope structure design, which removes redundant materials and compresses space, saves costs, and reduces product weight.

[0029] The input shaft 23 of the gearbox assembly is a stepped hollow shaft with an internal spline inside; the input shaft 23 is spline-connected to the motor shaft 4; both sides of the driving gear 22 are arranged on the input shaft 23 through bearings; preferably, input shaft ball bearing 1 29 and input shaft ball bearing 2 24 are arranged on both sides of the driving gear 22 and installed on the input shaft 23.

[0030] The output shaft 16 of the gearbox assembly is a stepped shaft with an external spline on the output end; both sides of the passive gear 12 are arranged at the shoulders of the output shaft 16 through bearings; preferably, output shaft ball bearing 13 and output shaft ball bearing 2 11 are arranged on both sides of the passive gear 12, and the output shaft ball bearing 13 and the output shaft ball bearing 2 11 are arranged at the shoulders of the output shaft.

[0031] Furthermore, both the driving gear 22 and the driven gear 12 are spur gears. The gearbox assembly adopts a parallel shaft arrangement and a single-stage spur gear is set to transmit torque, which greatly reduces torque loss.

[0032] Furthermore, the adjusting gasket can be arranged on the left side of the input shaft ball bearing 1 29 or on the right side of the input shaft ball bearing 2 24, and the number of the adjusting gaskets is 1-3.

[0033] The gearbox assembly includes: a bearing cover 20 bolted to the motor housing 1, a sealing assembly 19 arranged in the bearing cover 20, a groove arranged on the bearing cover 20, a dust cover 14 arranged on the groove, and a flange 15 arranged at the output end of the output shaft 16; the flange 15 is spline-connected to the output shaft 16; preferably, it also includes a flange nut 17 and a corresponding hexagonal head bolt 18, and the flange nut 17 is installed on the output shaft 16 through the hexagonal head bolt 18 to tighten the flange 15; the motor housing 1 is connected to the motor housing 1 through a hexagonal flange surface bearing toothed bolt 21.

[0034] It also includes an electronic control assembly; the electronic control assembly is connected to the motor housing 1 through bolts; preferably, the electronic control assembly adopts a knife-handle structure; the motor assembly, the electronic control assembly, and the gearbox assembly are integrated in design, and their independent modular configuration structure is simple, easy to install and maintain, and gets rid of the problem of difficult layout of the power take-off mechanism.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0036] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A parallel shaft power take-off mechanism for an electric drive axle, characterized in that: The invention comprises a motor assembly and a gearbox assembly; the housings of the motor assembly and the gearbox assembly are integrally arranged; the motor assembly comprises a motor shaft (4); the gearbox assembly comprises: an input shaft (23) connected to the output end of the motor shaft (4); a driving gear (22) arranged on the input shaft (23); an output shaft (16); and a driven gear (12) meshing with the driving gear (22) arranged on the output shaft (16).

2. The parallel shaft power take-off mechanism for an electric drive axle according to claim 1, characterized in that: The motor assembly further comprises: a motor housing (1), a stator core (2) and a rotor (3) connected to a motor shaft (4), and a motor outer water jacket (5) covering the stator core (2); the motor outer water jacket (5) is provided with a plurality of liquid cooling grooves, and the motor housing (1) is press-fitted outside the motor outer water jacket (5).

3. The parallel shaft power take-off mechanism for an electric drive axle according to claim 2, characterized in that: The motor assembly further comprises: an oil seal 1 (25) and an oil seal 2 (26) located near the motor shaft (4); a plurality of oil drain grooves (27) are arranged on the motor housing (1), and the bottom ends of the oil drain grooves (27) are arranged between the oil seal 1 (25) and the oil seal 2 (26).

4. The parallel shaft power take-off mechanism for an electric drive axle according to claim 2, characterized in that: The motor housing (1) adopts an envelope structure, a support (31) is provided at the bottom of the motor housing (1), a high-voltage wire clamp (32) is provided at the side of the motor housing (1), and a reinforcing rib (33) is provided at the side of the motor housing (1) extending to the support (31), and the structure is integrated.

5. The parallel shaft power take-off mechanism for an electric drive axle according to claim 1, characterized in that: The input shaft (23) of the gearbox assembly is a stepped hollow shaft with an internal spline arranged inside; the input shaft (23) is spline-connected with the motor shaft (4); and both sides of the driving gear (22) are arranged on the input shaft (23) through bearings.

6. The parallel shaft power take-off mechanism for an electric drive axle according to claim 1, characterized in that: The output shaft (16) of the gearbox assembly is a stepped shaft, and an external spline is arranged on the output end; both sides of the passive gear (12) are arranged at the shaft shoulder of the output shaft (16) through bearings.

7. The parallel shaft power take-off mechanism for an electric drive axle according to claim 2, characterized in that: The gearbox assembly comprises: a bearing cover (20) bolted to a motor housing (1), a sealing assembly (19) arranged in the bearing cover (20), a groove arranged on the bearing cover (20), a dust cover (14) arranged on the groove, and a flange (15) arranged at the output end of the output shaft (16); the flange (15) is spline-connected to the output shaft (16).

8. The parallel shaft power take-off mechanism for an electric drive axle according to claim 1, characterized in that: It also includes an electric control assembly; the electric control assembly is connected to the motor housing (1) through bolts.

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