Motor of five-in-one low-power electric pump assembly applied to vehicle active suspension

Abstract

The utility model is applicable to the technical field of shock absorbers, and provides a motor of a five-in-one low-power electric pump assembly applied to a vehicle active suspension, which comprises a motor shell and a controller lower shell, the motor shell and the controller lower shell are integrally cast and formed, a motor stator is arranged in the motor shell, and the motor stator is connected with the controller lower shell. The motor shell is in interference fit with the motor stator, the motor rotor is arranged in the motor stator, and the air gap between the motor rotor and the motor stator is 0.8; a deep groove ball bearing is arranged in the motor shell, the deep groove ball bearing supports the motor rotor and transmits torque, and a magnetic encoder for detecting the position of the motor rotor is further arranged in the motor shell. The motor shell and the controller lower shell are integrally cast and formed, so that the motor structure is more compact, the space occupancy rate of the motor is reduced, the BOM cost is saved, the weight is reduced, and the improvement of light weight and miniaturization is realized.

Description

Technical Field

[0001] This utility model belongs to the field of shock absorber technology, and in particular relates to a motor for a five-in-one low-power electric pump assembly used in vehicle active suspension. Background Technology

[0002] Automotive suspension shock absorbers are automotive components that connect the chassis and body of a car to reduce vehicle vibration. They are important parts of the suspension and affect the overall ride comfort and handling stability of the vehicle.

[0003] Traditional shock absorbers have poor vibration filtering performance and generally offer only average ride comfort. While semi-active suspensions offer continuously adjustable damping compared to traditional shock absorbers, they still lag significantly behind active suspensions in terms of adjustment precision and response speed. As market demands for smoothness and handling in automobiles increase, the market share of electronically controlled shock absorbers is gradually growing, and active suspensions, as a superior technical solution, are gradually becoming the mainstream in the market.

[0004] The motor is an important and indispensable power component of the electric pump assembly. The traditional electric pump assembly consists of a motor, a hydraulic pump and a controller. The motor and controller are separate structures connected by bolts, which not only makes the overall volume large, but also increases the manufacturing cost. Utility Model Content

[0005] This utility model provides a motor for a five-in-one low-power electric pump assembly applied to a vehicle's active suspension. It aims to solve the problems of reducing the space utilization and manufacturing cost of the electric pump assembly, as well as how to improve the smoothness and handling of the vehicle through the motor, thereby providing passengers with a better driving experience.

[0006] This utility model is implemented as follows: a motor for a five-in-one low-power electric pump assembly applied to a vehicle's active suspension includes a motor housing and a lower controller housing, wherein the motor housing and the lower controller housing are integrally cast.

[0007] A motor stator is installed inside the motor housing, and the motor housing and the motor stator are interference-fitted. A motor rotor is installed inside the motor stator, and the air gap between the motor rotor and the motor stator is 0.8.

[0008] The motor housing is equipped with a deep groove ball bearing, which bears the load and transmits torque to the motor rotor. The motor housing is also equipped with a magnetic encoder for detecting the position of the motor rotor.

[0009] Optionally, one side of the deep groove ball bearing is limited by a retaining ring groove reserved on the motor housing, and the other side of the deep groove ball bearing is axially limited to the motor rotor by a retaining ring groove reserved on the motor shaft.

[0010] Optionally, a pressure sensor and a temperature sensor are also provided inside the motor housing. The pressure sensor is located at the inlet and outlet of the hydraulic pump. The leads of the pressure sensor and the temperature sensor are fixed and insulated with rubber plugs for temperature and pressure harnesses and are connected to the controller.

[0011] Optionally, a 0.8mm air gap is provided between the motor stator and the motor rotor.

[0012] Optionally, a rotor protective sleeve is fixed to the inner wall of the motor stator, and the rotor protective sleeve is made of 0.1-0.25mm stainless steel.

[0013] Optionally, the motor housing is provided with a glue-filling hole for filling the gaps in the motor with glue.

[0014] Optionally, the three-phase lines of the motor stator are radially connected via a three-phase adapter plate.

[0015] Optionally, the motor housing is provided with a magnetic rear cover for sealing the rotor and preventing oil leakage.

[0016] Optionally, a sealing ring is provided inside the motor housing, which is used to fit around the deep groove ball bearing to achieve a seal between the deep groove ball bearing and the motor rotor.

[0017] The beneficial effects achieved by this utility model are as follows: This utility model provides a motor for a five-in-one low-power electric pump assembly applied to a vehicle's active suspension. The motor includes a motor housing and a lower controller housing, which are integrally cast. A motor stator is disposed within the motor housing, and the motor housing and motor stator are interference-fitted. A motor rotor is disposed within the motor stator, and the air gap between the motor rotor and the motor stator is 0.8 mm. A deep groove ball bearing is disposed within the motor housing to bear the load and transmit torque to the motor rotor. Furthermore, a magnetic encoder for detecting the position of the motor rotor is also disposed within the motor housing. The integrated casting of the motor housing and controller lower housing makes the motor structure more compact, thereby reducing the motor's space occupancy, saving BOM costs, and reducing weight, achieving improvements in lightweighting and miniaturization. The use of high-performance deep groove ball bearings and magnetic winding in conjunction with the motor rotor effectively enhances motor performance, continuously supplying high-pressure oil to the shock absorbers. This results in a wider suspension adjustment bandwidth and faster response speed, truly improving vehicle smoothness and handling, and providing passengers with a better driving experience. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the motor structure of the five-in-one low-power electric pump assembly used in the active suspension of a vehicle, as provided in this application.

[0021] Figure 2 This is a cross-sectional structural schematic diagram of the motor of the five-in-one low-power electric pump assembly used in the active suspension of a vehicle, as provided in this application.

[0022] Figure label:

[0023] 1-Pressure sensor, 2-Temperature sensor, 3-Temperature and pressure harness rubber plug, 4-Motor housing, 5-Motor stator, 6-Motor rotor, 7-Rotor protective sleeve, 8-Sealing ring, 9-Deep groove ball bearing, 10-Magnet back cover, 11-Three-phase adapter plate, 12-Magnetic braid, 13-Controller lower housing. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] To effectively illustrate the embodiments of this utility model, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0026] See Figure 1 As shown, this application discloses a motor for a five-in-one low-power electric pump assembly applied to a vehicle's active suspension. The motor includes a motor housing 4 and a lower controller housing 13, which are integrally cast to achieve high integration. A PCB board fixing device is provided at the junction of the motor housing 4 and the lower controller housing 13 to fix the PCB board to the motor housing 4. Furthermore, the lower part of the motor housing 4 is connected by mirror bolts to realize a five-in-one mirror motor. This not only makes the motor structure more compact, thereby reducing the space occupied by the motor, saving BOM costs and reducing weight, but also effectively achieves improvements in lightweighting and miniaturization, saving BOM costs.

[0027] See Figure 2As shown, the motor of the five-in-one low-power electric pump assembly for use in a vehicle's active suspension disclosed in this application includes a pressure sensor 1, a temperature sensor 2, a temperature and pressure harness rubber plug 3, a motor stator 5, a motor rotor 6, a rotor protective sleeve 7, a sealing ring 8, a deep groove ball bearing 9, a magnet back cover 10, a three-phase adapter plate 11, and a magnetic braid 12, all housed within the motor housing 4. The motor housing 4 and motor stator 5 are interference-fitted and assembled using a heating method. The pressure sensor 1 is located at the inlet and outlet of the hydraulic pump, and the motor uses the pressure sensor 1 to detect the pressure at the inlet and outlet of the hydraulic pump. The temperature sensor 2 is located inside the motor housing 4, and the motor uses the temperature sensor 2 to detect the internal temperature of the motor. Thus, effective pressure and temperature detection of the motor is achieved through the pressure sensor 1 and temperature sensor 2. To save internal space, the leads of the pressure sensor 1 and temperature sensor 2 are fixed and insulated with the temperature and pressure harness rubber plug 3, and their leads are connected to the controller, thereby transmitting the collected pressure and temperature signals to the controller in real time. Of course, since the heat is mainly generated during the rotation of the motor rotor 6 and the motor stator 5, the temperature sensor 2 is positioned close to the motor stator 5 and the motor rotor 6. The specific details will not be elaborated here.

[0028] In the specific implementation process, the three-phase lines of the motor stator 5 are radially transferred through the three-phase adapter plate 11, which can effectively save space. The motor stator 5 is interference-fitted with the inner wall of the motor housing 4. The motor rotor 6 is set inside the motor stator 5, and the air gap between the motor rotor 6 and the motor stator 5 is 0.8 mm. In order to ensure effective rotation between the motor rotor 6 and the motor stator 5 and to avoid contact damage caused by thermal expansion of the motor stator 5 and the motor rotor 6, an air gap of 0.8 mm is left between the motor stator 5 and the motor rotor 6.

[0029] In the specific implementation process, a rotor protective sleeve 7 is fixed to the inner wall of the motor stator 5. The rotor protective sleeve 7 is made of stainless steel with a wall thickness of 0.1-0.25mm. Through processing, the stainless steel rotor protective sleeve 7 is made to fit tightly against the inner wall of the motor stator 5, thereby effectively avoiding the risk of rotor rubbing. Moreover, in the motor disclosed in this application, the motor housing 4 is also provided with a glue-filling hole (not shown in the attached drawings). The glue-filling machine fills the gaps of the motor through the glue-filling hole, which on the one hand improves the insulation and thermal conductivity of the motor, and on the other hand reduces the vibration and noise of the motor, greatly increasing the overall reliability of the motor. On the other hand, if the gap between the motor stator 5 and the rotor protective sleeve 7 is filled with glue, the rotor protective sleeve 7 can also withstand a pressure of 20MPa, thereby effectively improving the protection of the motor rotor 6.

[0030] In the specific implementation process, a deep groove ball bearing 9 is installed inside the motor housing 4. The deep groove ball bearing 9 bears the load and transmits torque to the motor rotor 6. Specifically, a motor shaft is fixed inside the motor rotor 6. One end of the motor shaft is used to install the deep groove ball bearing 9. A retaining ring groove (not shown in the attached drawing) is reserved on one side of the motor shaft of the deep groove ball bearing 9, and a retaining ring groove (not shown in the attached drawing) is also reserved on the other side of the motor housing 4. The retaining ring groove reserved on the motor shaft on one side of the deep groove ball bearing 9 provides axial restraint to the motor rotor 6, and the retaining ring groove reserved on the motor housing 4 on the other side of the deep groove ball bearing 9 provides restraint, thereby realizing the installation of the deep groove ball bearing 9. At the same time, in order to ensure the sealing between the deep groove ball bearing 9 and the motor rotor 6, a sealing ring 8 is provided inside the motor housing 4. The sealing ring 8 is used to fit over the deep groove ball bearing 9 to achieve a seal between the deep groove ball bearing 9 and the motor rotor 6.

[0031] Of course, in the specific implementation process, a magnetic back cover 10 is provided on the motor housing 4 for sealing and installing the deep groove ball bearing 9, and a magnetic encoder 12 for detecting the position of the motor rotor 6 is also provided inside the motor housing 4. The magnetic encoder 12 is a type of magnetic encoder that can detect the position information of the motor rotor 6 in real time, and provide feedback on the absolute and relative position changes of the motor rotor 6. Through precise measurement of the rotor position, it can also assist the motor in initial positioning, ensuring that the motor can accurately find the initial position when starting, laying the foundation for subsequent precise control. The specifics are not elaborated here.

[0032] The motor disclosed in this application, a five-in-one low-power electric pump assembly for use in vehicle active suspension, integrates the motor housing 4 and the lower housing 13 of the controller in a single unit, achieving improvements in weight reduction and miniaturization. Furthermore, the motor gaps are treated with adhesive to improve insulation and thermal conductivity, while also reducing vibration and noise, significantly increasing overall motor reliability. The use of a low-power motor ensures performance while greatly improving space utilization and economy. Moreover, by using high-performance deep groove ball bearings and magnetic encoders in conjunction with the motor rotor, a high-performance permanent magnet motor drives a four-quadrant internal gear pump, supporting both forward and reverse rotation. This continuously supplies high-pressure oil to the shock absorbers, enabling a wider suspension adjustment bandwidth and faster response speed, truly improving vehicle smoothness and handling, and providing passengers with a better driving experience.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A motor for a five-in-one low-power electric pump assembly used in a vehicle's active suspension, characterized in that, The system includes a motor housing (4) and a lower controller housing (13), which are integrally cast. A motor stator (5) is provided inside the motor housing (4). The motor housing (4) and the motor stator (5) are interference-fitted. A motor rotor (6) is provided inside the motor stator (5). The air gap between the motor rotor (6) and the motor stator (5) is 0.

8. A deep groove ball bearing (9) is provided inside the motor housing (4). The deep groove ball bearing (9) supports the motor rotor (6) and transmits torque. A magnetic encoder (12) for detecting the position of the motor rotor (6) is also provided inside the motor housing (4).

2. The motor of the five-in-one low-power electric pump assembly applied to a vehicle's active suspension as described in claim 1, characterized in that, One side of the deep groove ball bearing (9) is limited by the retaining ring groove reserved on the motor housing (4), and the other side of the deep groove ball bearing (9) is axially limited to the motor rotor (6) by the retaining ring groove reserved on the motor shaft.

3. The motor of the five-in-one low-power electric pump assembly applied to a vehicle's active suspension as described in claim 1, characterized in that, The motor housing (4) is also equipped with a pressure sensor (1) and a temperature sensor (2). The pressure sensor (1) is located at the inlet and outlet of the hydraulic pump. The lead wires of the pressure sensor (1) and the temperature sensor (2) are fixed and insulated with a temperature and pressure wire harness rubber plug (3) and connected to the controller.

4. The motor of the five-in-one low-power electric pump assembly applied to a vehicle active suspension as described in claim 1, characterized in that, A 0.8mm air gap is left between the motor stator (5) and the motor rotor (6).

5. The motor of the five-in-one low-power electric pump assembly applied to a vehicle's active suspension as described in claim 4, characterized in that, The inner wall of the motor stator (5) is fixed with a rotor protective sleeve (7), which is made of 0.1-0.25mm stainless steel.

6. The motor of the five-in-one low-power electric pump assembly applied to a vehicle active suspension as described in claim 1, characterized in that, The motor housing (4) is provided with a glue-filling hole for filling the gaps in the motor with glue.

7. The motor of the five-in-one low-power electric pump assembly applied to a vehicle's active suspension as described in claim 1, characterized in that, The three-phase lines of the motor stator (5) are radially transferred through the three-phase adapter plate (11).

8. The motor of the five-in-one low-power electric pump assembly applied to a vehicle active suspension as described in claim 1, characterized in that, A magnet back cover (10) is provided on the motor housing (4).

9. The motor of the five-in-one low-power electric pump assembly applied to a vehicle active suspension as described in claim 1, characterized in that, A sealing ring (8) is provided inside the motor housing (4). The sealing ring (8) is used to be fitted on the outside of the deep groove ball bearing (9) to achieve the sealing between the deep groove ball bearing (9) and the motor rotor (6).

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