CN-224233463-U - Motor applied to vehicle chassis active suspension five-in-one electric pump assembly

CN224233463UCN 224233463 UCN224233463 UCN 224233463UCN-224233463-U

Abstract

The utility model provides a be applied to motor of five unification electric pump assemblies of vehicle chassis initiative suspension, belongs to vehicle chassis technical field, including motor housing, stator, rotor and motor shaft, motor housing and stator fixed connection, motor shaft and rotor interference press fit, motor housing be high strength aluminum alloy casing, be in the same place with the stator hot jacket through heating expansion's mode, the stator inboard is provided with the protective sheath, and the protective sheath press fit is on the corresponding installation position of casing, seals the protection to the rotor, the motor shaft is the hollow shaft, and inside is equipped with the oil circuit passageway, and the air gap between oil circuit passageway and the stator is linked together. The application reduces the space occupation, weight and manufacturing cost and assembly cost through integrated and compact design, and greatly improves the performance and heat dissipation of the motor.

Inventors

DAI HOUSHAN
LIU XIANG
CHEN WEI
SHI YONGHONG
CHI ZHIHENG

Assignees

上海淅减汽车悬架有限公司
南阳淅减汽车减振器有限公司

Dates

Publication Date: 20260512
Application Date: 20250418

Claims (7)

1. The utility model provides a be applied to motor of five unification electric pump assemblies of vehicle chassis initiative suspension, includes motor housing, stator, rotor and motor shaft, motor housing and stator fixed connection, motor shaft and rotor interference press fit, its characterized in that: the motor shell is a high-strength aluminum alloy shell, the motor shell is thermally sleeved with the stator in a heating expansion mode, a protective sleeve is arranged on the inner side of the stator, the protective sleeve is pressed on a corresponding installation position of the shell to seal and protect the rotor, the motor shaft is a hollow shaft, an oil path channel is arranged in the motor shaft, and the oil path channel is communicated with an air gap between the stator and the rotor.
2. The motor for the vehicle chassis active suspension five-in-one electric pump assembly of claim 1, wherein the end part of the motor shaft is connected with the gear end of the hydraulic pump through a spline or a five-square, and the motor shaft and the gear end of the hydraulic pump are coaxially arranged and connected in a sealing manner.
3. The motor for the vehicle chassis active suspension five-in-one electric pump assembly of claim 2, wherein the five-sided connection is a matching structure of a pentagonal shaft and a hole, the pentagonal boss is arranged at the shaft end of the motor shaft, namely, the outer five-sided boss, the pentagonal groove is arranged at the gear end of the hydraulic pump, namely, the inner five-sided boss, and the center line of the motor shaft is coincident with the center line of the gear end of the hydraulic pump.
4. The motor for the vehicle chassis active suspension five-in-one electric pump assembly of claim 2, wherein the hydraulic pump comprises an oil suction cavity, the oil suction cavity is communicated with a gap between a stator and a rotor of the motor through an oil passage of a motor shaft, cooling oil is filled in the oil suction cavity to form an oil cooling system, and the oil cooling system further comprises a one-way valve.
5. The motor for the vehicle chassis active suspension five-in-one electric pump assembly of claim 1, wherein the initial air gap between the stator and the rotor is 0.8mm, the air gap between the protective sleeve and the rotor is 0.5mm after the protective sleeve is assembled, and the protective sleeve is made of metal or composite materials, is positioned on the inner side of the stator and is fixed with a motor shell through interference fit.
6. The motor for the vehicle chassis active suspension five-in-one electric pump assembly according to claim 3, wherein the hydraulic pump is a four-quadrant internal gear pump, and the motor is a permanent magnet synchronous motor and supports forward and reverse driving.
7. A vehicle chassis active suspension five-in-one electric pump assembly is characterized by comprising the motor applied to the vehicle chassis active suspension five-in-one electric pump assembly according to any one of claims 1-6.

Description

Motor applied to vehicle chassis active suspension five-in-one electric pump assembly Technical Field The utility model belongs to the technical field of vehicle chassis, and particularly relates to a motor applied to a five-in-one electric pump assembly of an active suspension of a vehicle chassis, which is particularly suitable for the high-efficiency hydraulic driving requirement of an active suspension system. Background With the continuous development of the automobile industry, market clients have increasingly increased requirements for smoothness and operability of automobiles. In the technical field of vehicle suspensions, due to poor shock filtering performance, the conventional shock absorber is difficult to meet the requirements of users on driving comfort. To improve this situation, semi-active suspensions have been developed whose damping can be continuously tuned with some improvement in performance over conventional shock absorbers. However, a semi-active suspension still has a large gap in terms of adjustment accuracy and response speed compared to an active suspension. Active suspension as a better technical solution is becoming the main stream of the market. In an active suspension system, the electric pump assembly is one of the key components, and the motor is an important and indispensable power element in the electric pump assembly. The high-performance motor can drive the four-quadrant internal gear pump and support forward and reverse rotation, so that high-pressure oil is continuously provided for the shock absorber, wider adjustment bandwidth and faster response speed of the suspension are realized, smoothness and operability of a vehicle are truly improved, and better driving experience is brought to passengers. However, at present, no mature case exists in the aspect of the motor structure of the five-in-one electric pump assembly applied to the vehicle active suspension in China, and the development of the motor has the problems of high development cost, great design difficulty and the like. Therefore, there is a need for an innovative motor structural design to solve the deficiencies in the prior art and meet the market demand for high performance active suspension systems. Disclosure of utility model In order to solve the defects in the prior art, the utility model provides a motor of a five-in-one electric pump assembly applied to a vehicle chassis active suspension system, which meets the requirements of a high-performance active suspension system. The technical problems to be solved by the utility model are realized by the following technical scheme: The utility model discloses a motor applied to a vehicle chassis active suspension five-in-one electric pump assembly, which comprises a motor shell, a stator, a rotor and a motor shaft, wherein the motor shell is fixedly connected with the stator, the motor shaft and the rotor are in interference press fit, in the utility model, the motor shell is a high-strength aluminum alloy shell which is thermally sleeved with the stator in a heating expansion mode, a protective sleeve is arranged on the inner side of the stator, the protective sleeve is press-fitted on a corresponding mounting position of the shell to seal and protect the rotor, the motor shaft is a hollow shaft, an oil path channel is arranged in the motor shaft, and the oil path channel is communicated with an air gap between the stator and the rotor. In the utility model, the end part of the motor shaft is connected with the gear end of the hydraulic pump through a spline or a five-way joint, and the motor shaft and the gear end of the hydraulic pump are coaxially arranged and connected in a sealing way. Further, the five-square connection is a matching structure of a shaft with a pentagon-shaped section and a hole, the shaft end of the motor shaft is a pentagonal boss, namely an outer five-square, the gear end of the hydraulic pump is a pentagonal groove, namely an inner five-square, and the central line of the motor shaft is coincident with the central line of the gear end of the hydraulic pump. Further, the hydraulic pump comprises an oil suction cavity, the oil suction cavity is communicated with a gap between a stator and a rotor of the motor through an oil path channel of the motor shaft, cooling oil is filled in the oil suction cavity to form an oil cooling system, and the oil cooling system further comprises a one-way valve. In the utility model, the initial air gap between the stator and the rotor is 0.8mm, and the air gap between the protective sleeve and the rotor is 0.5mm after the protective sleeve is assembled so as to reduce the risk of sweeping the bore, and the protective sleeve is made of metal or composite material and is fixed with the stator and the motor shell through interference fit. In the utility model, the hydraulic pump is a four-quadrant internal gear pump, the motor is a permanent magnet synchronous motor, and forward and reverse rotation