CN-121973621-A - New energy automobile unifies electricity and drives assembly more

Abstract

The utility model provides a new energy automobile all-in-one electricity drives assembly, includes motor, motor controller, differential mechanism, oil cooling lubrication system and cooling water system, the motor sets up integrated casing with the motor controller outside, and the differential mechanism outside sets up the differential mechanism casing, differential mechanism is planetary gear differential mechanism, and differential mechanism includes input shaft, output shaft, and the input shaft passes the hole setting of motor rotor, and the input shaft is the hollow shaft, sets up the output shaft in the hole of input shaft, oil cooling lubrication system includes the tree-like oil duct that integrates in integrated casing, locates oil pump and heat exchanger on the casing, the tree-like oil duct has a plurality of branches, communicates respectively to the lubricating oil jet mouth of motor stator, is used for lubricated the nozzle orifice of bearing and is used for lubricating the inside oil circuit of input shaft and motor rotor, the cooling water system includes the water course that integrates in integrated casing, and the water course has inlet channel and the outlet corresponding with motor controller and the first cooling water through hole that communicates with the heat exchanger.

Inventors

• LIU ZHANGCHENG
• CANG YINGQING
• XIAO CHENGJIA
• ZHOU LIANGJUN
• HE JIAN
• ZHOU YANG

Assignees

• 重庆青山工业有限责任公司

Dates

Publication Date

20260505

Application Date

20260204

Claims (8)

1. 1. The utility model provides a new energy automobile all-in-one electricity drive assembly, includes motor, motor controller (2), differential mechanism, oil cooling lubrication system and cooling water system, motor and motor controller outside set up integrated casing (1), differential mechanism outside set up differential mechanism casing (3), integrated casing (1) left side sets up rear end cover (4) and changes visor (5) soon, characterized in that differential mechanism is planetary gear differential mechanism, and differential mechanism includes input shaft (18), output shaft (14), and input shaft (18) pass the hole setting of motor rotor (13), and input shaft (18) are the hollow shaft, set up output shaft (14) in the hole of input shaft (18), oil cooling lubrication system includes tree oil duct integrated in integrated casing (1), oil pump (6) and heat exchanger (7) of locating on the casing, tree oil duct has a plurality of branches, and the lubricating oil jet that communicate respectively to motor stator (12), oil spout hole for lubricating bearing and be used for lubricating input shaft (18) and motor rotor (13) inside oil circuit, cooling system includes that integrated casing (1) has an inlet and a water course (21) and a water course (20) and a water course (7) and a water course (11) are connected with the corresponding to the cooling water course (2).
2. 2. The multi-in-one electric drive assembly of the new energy automobile of claim 1, wherein the differential housing of the differential is integrated with the planet carrier.
3. 3. The new energy automobile all-in-one electric drive assembly according to claim 1, wherein the tree-shaped oil duct comprises a first oil duct (8) for connecting an oil pump (6) and a heat exchanger (7), a second oil duct (9) for connecting the heat exchanger (7) and a motor lubrication oil duct (19), and a third oil duct (10) connected to a rear end cover (4) and a rotary protective cover (5), and the motor lubrication oil duct (19) is communicated with a lubrication oil injection port of a motor stator (12).
4. 4. The electric drive assembly for the new energy automobile is characterized in that the cooling water system further comprises a cooling water through pipe (23) for connecting the heat exchanger (7) with an external whole automobile water tank and a second cooling water through hole (22) for guiding cooling water to the power supply assembly.
5. 5. The new energy automobile all-in-one electric drive assembly according to claim 1, wherein the motor controller (2) is directly assembled at the corresponding position of the integrated shell (1) through a locating pin and a threaded connection and is sealed by a sealing cover plate.
6. 6. The new energy automobile all-in-one electric drive assembly according to claim 1, wherein the side wall of the input shaft (18) is provided with an oil injection hole for lubricating the motor rotor (13).
7. 7. The new energy automobile all-in-one electric drive assembly of claim 1, wherein the integrated shell (1) is integrally formed by die casting.
8. 8. The electric drive assembly for the new energy automobile is characterized in that two ends of the input shaft (18) are respectively supported by a first bearing (15), a second bearing (16) and a third bearing (17).

Description

New energy automobile unifies electricity and drives assembly more Technical Field The invention relates to the field of new energy automobile spot-driving assemblies, in particular to a new energy automobile all-in-one electric driving assembly. Background With the rapid development of new energy automobile industry and the increase of market competition, electric drive systems are evolving towards high efficiency, high power density, low cost and high integration. An electric drive assembly of three-in-one (motor, controller, differential integration) to more-in-one has become the mainstream technical route of the industry. The integration level is improved, the number of parts of the system can be effectively reduced, the overall weight and the overall size are reduced, the assembly process is optimized, the cost is reduced, and meanwhile the flexibility of the whole vehicle arrangement and the improvement of the energy density are facilitated. Currently, the integration schemes of electric drive assemblies on the market focus on compact arrangements at the physical level and on a common housing design of the partial components. For example, it is common practice to arrange the Motor Controller (MCU) in the form of an independent or partially integrated housing at the rear end or laterally of the motor housing, fixed by bolting, and combined with a parallel shaft differential. Such solutions, while achieving a degree of integration, have inherent drawbacks in that, first, the split or partially integrated controller housing structure adds additional parts, connectors and sealing interfaces, which not only result in increased weight and cost, but also introduce potential leakage risks and accuracy control difficulties due to build-up of assembly dimension chains. Secondly, the parallel shaft type differential mechanism occupies relatively large radial space, further compression of the radial dimension of the assembly is limited, and the requirement of extremely harsh vehicle type platforms for installation space is difficult to meet. In the aspect of heat management, the prior art mostly adopts a mixed mode of motor water cooling and differential splash lubrication or simple oil cooling. Although the technology of the water-cooled motor is mature, the cooling liquid is isolated from the internal cavity of the motor, the cooling efficiency of the stator core and the winding is in a bottleneck, and the risk of electrical short circuit or lubricating oil emulsification caused by potential leakage of the cooling liquid exists. For splash lubrication, the lubrication effect depends on the rotating speed, and under the low-speed, high-torque or extreme working conditions, it is difficult to ensure that key moving parts such as bearings, gears and the like are continuously, uniformly and fully lubricated and cooled, and the reliability and the service life limit of the assembly are affected. In addition, when the system is highly integrated and the internal heating density is increased, the traditional thermal management scheme faces serious challenges in achieving efficient and uniform cooling and lubrication in a compact space, local overheating is easy to occur, and further improvement of the power density of the assembly is restricted. Therefore, there is a need in the art for an innovative housing structure of an electric drive assembly, which is capable of realizing ultra-high integration while breaking through the limitations of the prior art in terms of compactness, thermal management efficiency and cost control, and providing an integrated electric drive solution with a more compact structure, more efficient and reliable lubrication and cooling, and easy manufacturing and assembly. Disclosure of Invention The invention aims at overcoming the corresponding defects of the prior art and provides a new energy automobile all-in-one electric drive assembly. The integrated box adopts a cooling scheme of forced oil cooling lubrication, and by adopting the scheme, the problems of difficult cooling and lubrication and high-temperature failure of internal parts caused by high integration level can be avoided, the high requirement of the existing market on the product performance is met, meanwhile, the three-dimensional size of the product is extremely compressed, and the goals of light weight, miniaturization and low cost of the whole vehicle are more facilitated. The invention discloses a new energy automobile all-in-one electric drive assembly which comprises a motor, a motor controller, a differential mechanism, an oil cooling lubrication system and a cooling water system, wherein an integrated shell is arranged outside the motor and the motor controller, the differential mechanism is arranged outside the differential mechanism, a rear end cover and a rotary protective cover are arranged on the left side of the integrated shell, the differential mechanism is a planetary gear differential mechanism and comprises