Active suspension electro-hydraulic pump assembly, chassis axle, and chassis system for vehicle

Abstract

The present invention discloses an active suspension electro-hydraulic pump assembly, a chassis wheel axle and a chassis system for a vehicle. An integrated motor housing and a controller cover are provided, and the integrated housing is provided with motor cavities located at both ends in the axial direction. Two motors and corresponding hydraulic pumps are respectively installed in the two motor cavities, and the controller cover is covered on the circuit board mounting surface of the integrated motor housing to form a controller cavity for mounting a circuit board. Only sealant is provided between the controller cover and the circuit board mounting surface for connection. The assembly process of the electro-hydraulic pump assembly is reconstructed and simplified, and the design of bolt-fixed connection between the dual motors and the process of sealant sealing are avoided, thereby improving the overall anti-road vibration function of the product and the sealing reliability of the product controller cavity.

Description

Technical Field

[0001] The present invention belongs to the technical field of active suspension, and in particular relates to an active suspension electro-hydraulic pump assembly, a chassis axle and a chassis system for a vehicle. Background Art

[0002] Active suspension specifically includes sensors, controllers, and actuators. Sensors are responsible for detecting the vehicle's status, such as body acceleration, suspension displacement, and wheel speed. The controller processes this data and then uses an algorithm to calculate the force to be applied or the parameters to be adjusted. Finally, actuators (such as hydraulic or electromagnetic actuators) actually adjust the suspension. The key advantage of active suspension is its real-time adjustment, which can respond to road surface changes within milliseconds to keep the vehicle body stable. For example, when a wheel encounters a bump, the suspension can quickly contract to reduce the impact transmitted to the vehicle body. When cornering, the active suspension can adjust its stiffness to reduce roll and improve handling.

[0003] Active suspensions typically use hydraulic or electromagnetic systems for actuators. Hydraulic actuators offer fast response and high force, but they are complex and energy-intensive. Electromagnetic actuators, such as linear motors, may be more efficient but may not offer the same force output as hydraulic systems.

[0004] The hydraulic actuator specifically consists of a damper with a double-acting hydraulic cylinder and piston, a hydraulic pump head, an electric motor driving the corresponding hydraulic pump, and a hydraulic unit with a hydraulic oil tank and valves. The operating principle is that the electric motor drives the hydraulic pump in forward or reverse rotation, driving hydraulic oil into the double-acting hydraulic cylinder. The piston then outputs damping to control the corresponding wheel suspension system.

[0005] The patent clusters CN114987130A, CN112193009A, CN118775486A, CN118739725A, CN117365939A, and CN116428401A applied for by Lapa Automobile Company describe assembly products or technologies for providing hydraulic pressure to electronic controls in active suspension systems in the vehicle chassis field. This product or technology can receive and respond to the control instructions issued by the vehicle's central processor after calculating and processing the vehicle's driving road condition signals from the vehicle's cameras, radars and other sensors in advance, and then quickly provide or withdraw hydraulic pressure to the suspension system's shock absorbers to lift the vehicle body, thereby improving the vehicle's road comfort.

[0006] Patents CN114987130A and CN112193009A describe products and technologies with three functional groups. Their key features include: a first motor-pump assembly, comprising a first hydraulic pump and a first motor for driving the first hydraulic pump; a second motor-pump assembly, comprising a second hydraulic pump and a second motor for driving the second hydraulic pump; and a third electronic unit for controlling the first and second motor-pump assemblies. These three functional groups are housed within a monolithic housing comprised of at least three partial housings, each of which is adjacent to and sealed at least or precisely therewith by a sealing adhesive. The primary drawback or relative disadvantage of these patented technologies is that the three partial housings require simultaneous application and curing of sealant in three dimensions, a complex and challenging process. If the sealant is applied and cured sequentially in two directions, the sealant is poorly sealed at the junction of the two adhesive layers, significantly impacting the lifespan of the electronic controller unit within the cavity. The two hydraulic-motor assemblies are connected by bolts, which bear a significant weight, resulting in a complex and relatively unreliable connection.

[0007] Specifically, the existing technology involves relatively complex and unreliable structural designs for components or parts, such as motors and housings, and the corresponding assembly and manufacturing processes, leading to high costs. Particularly problematic is the screw / pin fastening method used to connect the dual motors and their housings. Considering factors such as the motor weight distribution and the vibration level of the vehicle frame, the vibration resistance is generally unreliable. Furthermore, the cavity seals between the dual motors, as well as between the dual motor housings and the upper cover, are sealed using three-dimensional T-shaped cross-plane sealing grooves. This inevitably leads to the following issues:

[0008] (1) If the synchronous gluing process is adopted, it is extremely difficult to implement. Combined with the assembly of the controller, it is almost impossible to implement.

[0009] (2) In the step-by-step gluing process, the sealing effect of the bonding interface of the secondary gluing is less reliable. Summary of the Invention

[0010] In response to the above problems, the present invention provides an active suspension electro-hydraulic pump assembly, a chassis axle and a chassis system for a vehicle, which provides a completely new structure in which two electric motors are installed on the same integrated motor housing.

[0011] In order to solve the above problems, the technical solution of the present invention is:

[0012] An active suspension electro-hydraulic pump assembly of the present invention comprises:

[0013] a first electro-hydraulic pump group and a second electro-hydraulic pump group, each of the first electro-hydraulic pump group and the second electro-hydraulic pump group comprising a hydraulic pump and an electric motor for driving the hydraulic pump;

[0014] a circuit board, configured to control the first electro-hydraulic pump group and the second electro-hydraulic pump group;

[0015] Also included is an integrated motor housing and controller cover;

[0016] The integrated motor housing is configured to have two motor cavities arranged in the axial direction and with openings located at both ends, and a circuit board mounting surface located in the circumferential direction thereof; the two motor cavities are respectively used to mount the two motors;

[0017] The controller cover is configured to cover the circuit board mounting surface and form a controller cavity, and the circuit board is mounted in the controller cavity and parallel to the axis;

[0018] Among them, two potting glue openings are provided on the mounting surface of the circuit board, and the two potting glue openings respectively penetrate to the bottom surface of the corresponding motor cavity, and the two potting glue openings are both located in the controller cavity; the two potting glue openings and the two openings of the motor cavity are configured to cooperate with the corresponding potting tooling in the assembly process to simultaneously carry out the filling and curing processes of the potting glue.

[0019] In the active suspension electro-hydraulic pump assembly of the present invention, the circuit board is a control board;

[0020] The control board is provided with a signal processing unit, a control unit and a power processing unit.

[0021] In the active suspension electro-hydraulic pump assembly of the present invention, the power processing unit is arranged on the surface of the control board facing away from the motor, and the heat generated by the power processing unit is configured to be transferred to the controller cover for heat dissipation.

[0022] In the active suspension electro-hydraulic pump assembly of the present invention, the integrated motor housing is configured to further have an intermediate cavity located between the two motor cavities;

[0023] The intermediate cavity is connected to the controller cavity, and a signal relay control unit corresponding to the two motors is provided in the intermediate cavity;

[0024] The signal relay control unit is configured to collect preset parameter data groups and integrate and relay them to the circuit board.

[0025] The active suspension electro-hydraulic pump assembly of the present invention, the signal relay control unit includes a fixing bracket and two electrical connection parts;

[0026] The fixing bracket is installed in the middle cavity, and the fixing bracket has a first accommodating portion and a second accommodating portion that are arranged opposite to each other;

[0027] The two electrical connection parts are respectively plugged into the first accommodating part and the second accommodating part; the two electrical connection parts are respectively provided with a Hall sensor matching the corresponding motor shaft;

[0028] The two electrical connection parts are respectively connected to the circuit board through a control board cable; or the two electrical connection parts are connected through a transfer cable, and one of the electrical connection parts is connected to the circuit board through a control board cable.

[0029] In the active suspension electro-hydraulic pump assembly of the present invention, the electrical connection portion is configured to be electrically connected to a pump cavity temperature and pressure sensor board mounted on the corresponding hydraulic pump via a pump cavity temperature and pressure sensor cable;

[0030] A cable opening is provided on a side of the circuit board mounting surface close to the hydraulic pump, and the pump cavity temperature and pressure sensor cable is configured to be connected to the pump cavity temperature and pressure sensor board through a slot in the cable opening.

[0031] In the active suspension electro-hydraulic pump assembly of the present invention, the electrical connection portion is fixedly provided with a three-phase terminal on the power receiving side, and the three-phase terminal on the power receiving side is electrically connected to the three-phase port corresponding to the motor; the circuit board is respectively provided with a three-phase terminal on the power supply side that matches the two three-phase terminals on the power receiving side;

[0032] Among them, the three-phase terminal on the power supply side is provided with a three-phase clamping part, and the three-phase terminal on the power receiving side is configured to be inserted into the three-phase clamping part, and the fixed connection between the three-phase terminal on the power supply side and the three-phase terminal on the power receiving side is achieved based on the clamping action of the three-phase clamping part.

[0033] In the active suspension electro-hydraulic pump assembly of the present invention, the hydraulic pump is an internal gear pump;

[0034] The internal gear pump includes a pump housing, a filling piece and an internal gear set;

[0035] A working space is defined in the pump housing, the internal meshing gear set is arranged in the working space, and a first fluid port and a second fluid port communicating with the working space are provided on the pump housing;

[0036] The internally meshing gear set includes a first gear having external teeth and a second gear having internal teeth, the first gear being configured to rotate when driven by a rotating shaft of the motor, and the second gear being configured to mesh with the first gear in a meshing area, and forming a fluid space away from the meshing area between the first gear and the second gear;

[0037] The filling member is arranged in the fluid space and divides the fluid space into a first fluid cavity and a second fluid cavity located on both sides of the fluid space in a circumferential direction, the first fluid cavity is connected to the first fluid port via a first fluid channel, and the second fluid cavity is connected to the second fluid port via a second fluid channel;

[0038] The first gear and the second gear have involute tooth profiles or linear conjugate tooth profiles, and the number of teeth of the first gear and the number of teeth of the second gear are in a mutually prime tooth ratio.

[0039] The active suspension electro-hydraulic pump assembly of the present invention further includes two axial compensation units respectively arranged at the axial ends of the internally meshing gear set; both of the axial compensation units are configured to be axially adhered to the first gear and / or the second gear under the action of the compensation force.

[0040] The active suspension electro-hydraulic pump assembly of the present invention is further provided with a third fluid chamber located between the first fluid chamber and the second fluid chamber in the fluid space, and the fluid pressure in the third fluid chamber is located between the first fluid chamber and the second fluid chamber; wherein, the axial compensation unit is provided with an oil channel connected to the third fluid chamber, and the axial compensation unit is provided with a pressure balancing chamber on the side away from the internal meshing gear set, and the oil channel is configured to guide the oil in the third fluid chamber into the pressure balancing chamber to balance the deflection force acting on the axial compensation unit due to the fluid pressure difference between the first fluid chamber and the second fluid chamber.

[0041] In the active suspension electro-hydraulic pump assembly of the present invention, a third fluid cavity is further formed in the fluid space and is located between the first fluid cavity and the second fluid cavity;

[0042] Wherein, the rotating shaft is a hollow shaft, and the hollow inner cavity of the rotating shaft is respectively connected to the third fluid cavity and the sealed wet cavity in the motor, and the sealed wet cavity is respectively connected to the first fluid cavity and the second fluid cavity through two pressure relief check structures on the pump casing.

[0043] The active suspension electro-hydraulic pump assembly of the present invention, the pressure relief check structure includes an oil discharge channel, an oil discharge seal and an oil discharge elastic member provided in the pump housing;

[0044] One end of the oil unloading channel is connected to the sealed wet chamber, and the other end of the oil unloading channel is connected to the first fluid chamber or the second fluid chamber; a section of the inner wall of the oil unloading channel extends inward to form an annular check surface, and the annular check surface is arranged toward the fluid space;

[0045] The oil unloading seal is movably connected in the oil unloading channel;

[0046] The elastic member is connected to the sealing member, and the sealing member is configured to abut against the annular check surface under the elastic force of the oil unloading elastic member to close the oil unloading channel.

[0047] The active suspension electro-hydraulic pump assembly of the present invention comprises an electric motor comprising a stator module, a rotor module and a bearing base. The bearing base and the corresponding hydraulic pump are respectively sealedly connected to both ends of the stator module and cooperate to form a sealed wet cavity communicating with the pump cavity of the hydraulic pump.

[0048] The rotating shaft of the rotor module is rotatably connected to the bearing base and the hydraulic pump, and the rotating shaft is transmission-connected to the pump head assembly of the hydraulic pump.

[0049] The active suspension electro-hydraulic pump assembly of the present invention, wherein the rotor module further comprises a silicon steel sheet assembly, a plurality of magnetic steels and an injection molded part;

[0050] A plurality of magnetic steel slots are distributed on the silicon steel sheet assembly, and the magnetic steel is arranged in the magnetic steel slots;

[0051] The injection molded part includes a plurality of filling parts and connecting parts respectively located at both ends of the silicon steel sheet assembly; the silicon steel sheet assembly is provided with a plurality of injection holes, the filling parts are filled in the injection holes, and the two ends of the filling parts are respectively connected to the connecting parts;

[0052] The rotating shaft is connected to the rotating shaft hole on the silicon steel sheet assembly, and an induction magnet is provided at one end of the rotating shaft away from the hydraulic pump.

[0053] The active suspension electro-hydraulic pump assembly of the present invention, wherein the stator module includes a stator tooth component, a stator yoke, a stator winding and a plastic part;

[0054] The stator tooth component includes a plurality of stator teeth, and a reinforcing rib is provided between adjacent stator teeth for connection; the stator yoke is sleeved and connected to the outside of the stator tooth component; the stator winding is connected to the stator tooth component; the plastic component wraps the stator tooth component and the stator winding, and fills the gap between the stator tooth component, the stator yoke and the stator winding; and a portion of the surface of the plastic component forms the stator inner wall of the stator module;

[0055] Wherein, both ends of the inner wall of the stator are respectively configured to have stator sealing connection sections, and the two stator sealing ends are respectively sealedly connected to the bearing base and the hydraulic pump through sealing elements;

[0056] It also includes two support sleeves, which are inserted into the plastic part from both ends in the axial direction; and the support sleeves are configured to support the corresponding stator sealing connection section to prevent the sealing connection section from deforming due to temperature changes and affecting the compression rate of the sealing ring.

[0057] In the active suspension electro-hydraulic pump assembly of the present invention, the rotating shaft of the electric motor is drivingly connected to the pump head assembly of the hydraulic pump, and the pump housing of the hydraulic pump includes an oil inlet plate and an oil outlet plate connected to each other; an axial gap is provided between the rotating shaft and the oil inlet plate;

[0058] Also included are an elastic conductive structure and a grounding structure;

[0059] The elastic conductive structure is installed in the axial gap, and the elastic conductive structure is configured to be clamped between the oil inlet plate and the axial end surface of the rotating shaft in a preset compression state;

[0060] The grounding structure is mounted on the oil inlet plate, and the grounding structure is configured to be connected to an external ground terminal;

[0061] Wherein, the axial expansion and contraction amount of the elastic conductive structure in the preset compression state is greater than the axial movement amount of the rotating shaft.

[0062] In the active suspension electro-hydraulic pump assembly of the present invention, the oil outlet plate is mounted on the opening of the motor cavity;

[0063] The grounding structure includes a grounding bolt, a metal bracket, a grounding gasket and a flexible grounding wire;

[0064] The grounding bolt includes a first threaded section, a shock-absorbing mounting section and a second threaded section arranged in sequence in the axial direction; the first threaded section is threadedly connected to the oil inlet plate and the oil outlet plate, and the first threaded section is in conductive contact with the oil inlet plate and the oil outlet plate; the metal bracket is installed at the external grounding end, and the metal bracket is configured to be elastically connected to the shock-absorbing mounting section through a shock-absorbing ring; the grounding gasket is sleeved on the second threaded section, and the grounding gasket is locked to the shock-absorbing ring through a grounding nut; the two ends of the flexible grounding wire are electrically connected to the metal bracket and the grounding gasket respectively.

[0065] A chassis wheel axle of the present invention comprises the active suspension electro-hydraulic pump assembly described in any one of the above;

[0066] Also, there are a first hydraulically adjustable shock absorber and a second hydraulically adjustable shock absorber respectively hydraulically connected to the corresponding hydraulic pump.

[0067] A chassis system of the present invention comprises the active suspension electro-hydraulic pump assembly described in any one of the above;

[0068] And, there are a first hydraulically adjustable shock absorber and a second hydraulically adjustable shock absorber respectively hydraulically connected to the corresponding hydraulic pump; the first hydraulically adjustable shock absorber and the second hydraulically adjustable shock absorber are assigned to a common chassis axle, or the first hydraulically adjustable shock absorber and the second hydraulically adjustable shock absorber are arranged on a common chassis axle.

[0069] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0070] 1. An embodiment of the present invention provides an integrated motor housing and a controller cover, and configures the integrated housing to have motor cavities located at both ends in the axial direction. The two motor cavities are respectively installed with two electric motors and corresponding hydraulic pumps. The controller cover is covered with the circuit board mounting surface of the integrated motor housing to form a controller cavity for mounting the circuit board. Only sealant is provided between the controller cover and the circuit board mounting surface for connection. This reconstructs and simplifies the assembly process of the electro-hydraulic pump assembly, avoids the design of bolt-fixed connection between the two motors and the process of sealant sealing, and improves the overall product's resistance to road vibration and the sealing reliability of the product's controller cavity.

[0071] In addition, this embodiment also innovatively provides two potting glue ports on the mounting surface of the circuit board that penetrate through to the bottom surface of the corresponding motor cavity. The potting glue ports can cooperate with the potting glue tooling provided thereon and the potting glue tooling inserted into the opening of the motor cavity to realize the synchronous potting and curing process of the dual motor cavities when the integrated motor housing is horizontally placed. The provision of the potting glue ports circumvents the limitations of the conventional potting solution of potting glue through the potting glue tooling at the opening of the motor cavity for the horizontally placed integrated motor housing, and enables the dual motors to be fixed synchronously in the corresponding motor cavities, avoiding the need to pot and cure the two motors in sequence, optimizing the assembly process of the motor part, and making the electro-hydraulic pump assembly solution using the integrated motor housing feasible and effectively reducing costs.

[0072] 2. An embodiment of the present invention sets the circuit board as a control board, and the control unit controls the dual motors. It also innovatively sets the heat dissipation path of the heat-generating components such as the power processing unit on the control board to dissipate heat upward through the controller cover, avoiding the conventional solution of dissipating heat downward to the motor to dissipate heat through the fluid circulating inside the motor, reconstructing the heat dissipation path of the assembly controller, and substantially reducing the requirements for the heat-resistant selection of controller components, thereby reducing costs and improving the heat resistance level of the entire machine.

[0073] 3. One embodiment of the present invention provides a signal relay control unit, wherein two electrical connectors receive preset parameter data sets such as the temperature and pressure of the working medium inside the hydraulic pump and the rotational speed, and transmit them to the circuit board for integrated relaying, thereby achieving weak current connection. Furthermore, the electrical connector also achieves strong current connection by plugging the electrical connector with the fixed bracket installed in the middle cavity, and by clamping the three-phase terminals on the power receiving side with the three-phase terminals on the power supply side of the circuit board. The structural and electrical connections between the assembly controller subassembly and the dual motor subassembly are reconstructed, greatly increasing the connection reliability between product components, facilitating the assembly process between product assemblies or components, and reducing production costs.

[0074] Fourth, one embodiment of the present invention utilizes an internally meshing gear set, in which the first and second gears have involute or linear conjugate tooth profiles. Furthermore, the number of teeth on the first and second gears is in a mutually prime ratio, i.e., a tooth ratio design with no common divisor. This significantly reduces oil trapping, improves meshing smoothness and gear reliability and lifespan, and reduces gear meshing noise. Furthermore, a grounding structure is designed on the pump housing, integrating fixed-mounted shock absorption and complete housing grounding, enhancing the compatibility of the active suspension electro-hydraulic pump assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 is an overall schematic diagram of the active suspension electro-hydraulic pump assembly of the present invention;

[0076] Figure 2 This is an overall exploded view of the active suspension electro-hydraulic pump assembly of the present invention;

[0077] Figure 3 Another overall exploded view of the active suspension electro-hydraulic pump assembly of the present invention;

[0078] Figure 4 A cross-sectional view of the active suspension electro-hydraulic pump assembly of the present invention excluding the controller cover and the circuit board;

[0079] Figure 5 A schematic diagram of a controller cover and a circuit board of an active suspension electro-hydraulic pump assembly according to the present invention;

[0080] Figure 6 A cross-sectional view of a controller cover and a circuit board of an active suspension electro-hydraulic pump assembly of the present invention;

[0081] Figure 7 An exploded view of the hydraulic pump of the active suspension electro-hydraulic pump assembly of the present invention adopting a linear conjugate tooth profile;

[0082] Figure 8 A cross-sectional view of a hydraulic pump of an active suspension electro-hydraulic pump assembly according to the present invention adopting a linear conjugate tooth profile;

[0083] Figure 9 Schematic diagram of the assembly of the stator and rotor of the active suspension electro-hydraulic pump assembly of the present invention;

[0084] Figure 10 This is a schematic diagram of the assembly of the dual-motor assembly of the active suspension electro-hydraulic pump assembly of the present invention before potting;

[0085] Figure 11 An exploded view of the pump housing and upper components of the active suspension electro-hydraulic pump assembly of the present invention;

[0086] Figure 12 This is a schematic diagram of the assembly of the dual motor assembly of the active suspension electro-hydraulic pump assembly of the present invention after potting;

[0087] Figure 13 Schematic diagram of the structure of the potting cavity, stator and rotor, and pump housing of the active suspension electro-hydraulic pump assembly of the present invention (the third sealing ring is not shown);

[0088] Figure 14 Schematic diagram of the cross-sectional structure of the stator module of the active suspension electro-hydraulic pump assembly of the present invention;

[0089] Figure 15 An exploded schematic diagram of the rotor module, bearing base, and bearing module of the active suspension electro-hydraulic pump assembly of the present invention;

[0090] Figure 16 Schematic diagram of an explosion of a stator module of an active suspension electro-hydraulic pump assembly of the present invention;

[0091] Figure 17 Schematic diagram of a radial cross-section of a stator module of an active suspension electro-hydraulic pump assembly of the present invention;

[0092] Figure 18 It is a structural schematic diagram of the stator teeth component of the active suspension electro-hydraulic pump assembly of the present invention;

[0093] Figure 19 for Figure 16 Schematic diagram of the stator yoke;

[0094] Figure 20 This is a schematic structural diagram of the glue filling layer of the active suspension electro-hydraulic pump assembly of the present invention;

[0095] Figure 21 for Figure 16 Schematic diagram of the injection molding layer;

[0096] Figure 22 Schematic diagram of the assembly of the stator module and bearing base of the active suspension electro-hydraulic pump assembly of the present invention;

[0097] Figure 23This is an exploded schematic diagram of the assembly of the rotor module of the active suspension electro-hydraulic pump assembly of the present invention on the driving end side of the rotating shaft;

[0098] Figure 24 It is a radial cross-sectional schematic diagram of the rotor module of the active suspension electro-hydraulic pump assembly of the present invention;

[0099] Figure 25 It is a structural schematic diagram of an injection molded part of an active suspension electro-hydraulic pump assembly of the present invention;

[0100] Figure 26 Schematic diagram of a silicon steel sheet component of the active suspension electro-hydraulic pump assembly of the present invention;

[0101] Figure 27 A partial schematic diagram of a silicon steel sheet component of the active suspension electro-hydraulic pump assembly of the present invention being assembled with magnetic steel;

[0102] Figure 28 A schematic structural diagram of an integrated motor housing (a portion cut off by a cross section parallel to the motor axis) of an active suspension electro-hydraulic pump assembly according to the present invention;

[0103] Figure 29 A schematic diagram of the assembly of the integrated motor housing (the portion cut off by the cross section perpendicular to the motor axis) and the controller cover of the active suspension electro-hydraulic pump assembly of the present invention;

[0104] Figure 30 This is a schematic diagram of a first gear adopting a linear conjugate tooth profile for the hydraulic pump of the active suspension electro-hydraulic pump assembly of the present invention;

[0105] Figure 31 A schematic diagram of a hydraulic pump of the active suspension electro-hydraulic pump assembly of the present invention using a linear conjugate tooth-shaped unloading groove;

[0106] Figure 32 This is a schematic diagram of an oil channel using a linear conjugate tooth profile for the hydraulic pump of the active suspension electro-hydraulic pump assembly of the present invention;

[0107] Figure 33 An exploded view of the hydraulic pump of the active suspension electro-hydraulic pump assembly of the present invention adopting an involute tooth profile;

[0108] Figure 34 A cross-sectional view of a hydraulic pump of an active suspension electro-hydraulic pump assembly according to the present invention adopting an involute tooth profile;

[0109] Figure 35 This is a schematic diagram of a first gear adopting an involute tooth profile for the hydraulic pump of the active suspension electro-hydraulic pump assembly of the present invention;

[0110] Figure 36 A schematic diagram of an unloading groove with an involute tooth profile is shown for the hydraulic pump of the active suspension electro-hydraulic pump assembly of the present invention;

[0111] Figure 37 This is a schematic diagram of an oil channel with an involute tooth profile adopted by the hydraulic pump of the active suspension electro-hydraulic pump assembly of the present invention;

[0112] Figure 38 An exploded view of the shaft current derivation structure of the active suspension electro-hydraulic pump assembly of the present invention;

[0113] Figure 39 A cross-sectional view of the shaft current derivation structure of the active suspension electro-hydraulic pump assembly of the present invention;

[0114] Figure 40 A cross-sectional view of another shaft current derivation structure of the active suspension electro-hydraulic pump assembly of the present invention;

[0115] Figure 41 A schematic diagram of a carbon brush assembly of another axis current derivation structure of the active suspension electro-hydraulic pump assembly of the present invention;

[0116] Figure 42 A single-board layout diagram of the active suspension electro-hydraulic pump assembly of the present invention;

[0117] Figure 43 A cross-sectional view of the heat dissipation structure on the top surface of the control board of the active suspension electro-hydraulic pump assembly of the present invention;

[0118] Figure 44 A front view of a control board solution for an active suspension electro-hydraulic pump assembly according to the present invention;

[0119] Figure 45 A front view of another control single board solution of the active suspension electro-hydraulic pump assembly of the present invention;

[0120] Figure 46 Schematic diagram of the module composition of the active suspension electro-hydraulic pump assembly of the present invention;

[0121] Figure 47 A schematic diagram of the electrical connection portion of the active suspension electro-hydraulic pump assembly of the present invention;

[0122] Figure 48 Another schematic diagram of the electrical connection portion of the active suspension electro-hydraulic pump assembly of the present invention;

[0123] Figure 49 A schematic diagram of a signal relay control unit of an active suspension electro-hydraulic pump assembly according to the present invention;

[0124] Figure 50 Schematic diagram of a pump cavity temperature and pressure sensor plate of an active suspension electro-hydraulic pump assembly of the present invention;

[0125] Figure 51is a schematic diagram of the grounding structure of the active suspension electro-hydraulic pump assembly of the present invention;

[0126] Figure 52 A schematic diagram of a grounding bolt of an active suspension electro-hydraulic pump assembly according to the present invention;

[0127] Figure 53 It is a schematic diagram of the pressure relief and check structure of the active suspension electro-hydraulic pump assembly of the present invention.

[0128] Explanation of the accompanying symbols: 1. stator module; 1.1.1. stator tooth component; 1.1.1.1.1. tooth portion; 1.1.1.2. first connecting portion; 1.1.1.3. second protrusion; 1.1.2. reinforcing rib; 1.2. stator yoke; 1.2.1. second groove; 1.3. insulating skeleton; 1.4. coil; 1.5. glue layer; 1.5.1. first groove; 1.5.2. block; 1.6. injection molding layer; 1.6.1. first protrusion; 1.6.2. stator inner wall; 1.6.3. injection molding chamfer; 1.7. temperature detection unit; 1.8. support sleeve; 2. rotor module; 2.1. shaft; 2.1.1. annular groove; 2.1.2. oil outlet hole; 2.1.3. step Surface; 2.1.4, retaining ring groove; 2.2, silicon steel sheet assembly; 2.2.1, magnetic steel groove; 2.2.2, air avoidance groove; 2.2.3, first injection molding hole; 2.2.4, second injection molding hole; 2.2.5, magnetic isolation bridge; 2.2.6, shaft hole; 2.2.7, channel; 2.3, magnetic steel; 2.4, injection molding part; 2.4.1, filling part; 2.4.2, second connecting part; 2.4.2.1, dynamic balancing hole; 2.5, dynamic balancing part; 2.6, thrust pad; 2.7, magnetic ring; 2.8, fixing sleeve; 3, bearing base; 3.1, cover plate; 3.1.1, second mounting surface; 3.1.2, clearance groove; 3.2, side wall part; 3.3, first sealing ring; 4, bearing module; 4.1, rolling bearing; 4 .2. Bearing seat; 4.2.1. C-spring groove; 4.2.2. First mounting surface; 4.3. Circlip; 4.4. C-spring; 4.5. Leaf spring; 5. Oil outlet plate; 5.1. Second sealing ring; 5.2. Third sealing ring; 5.3. First sliding bearing; 5.4. Second sealing ring groove; 5.5. Third sealing ring groove; 5.6: Oil discharge channel; 5.6.1: Annular check surface; 5.7: Check valve seat; 5.8: Oil discharge elastic member; 5.9: Oil discharge seal; 5.10: Cutout; 6. Integrated motor housing; 6.1. Motor cavity; 6.1.1. Circumferential positioning surface; 6.1.3. Axial positioning surface; 6.2. Intermediate cavity; 6.3. Potting glue port; 6.4. Intermediate cavity opening 6.5. Mounting opening; 6.6. Circuit board mounting surface; 6.6.1. Mounting slot; 6.6.2. Sealing groove; 6.6.3. Threaded hole; 6.7. Cable opening; 7.1. Potting compound; 7.2. Potting fixture 1; 7.2.1. Potting hole; 7.3. Potting fixture 2; 7.3.1. Auxiliary sliding bearing; 8.1. Signal relay control unit; 8.2. Pump chamber temperature and pressure sensor board; 8.2.1. M3 screw; 8.2.2. Pump chamber temperature and pressure fixing hole; 8.2.3. Temperature and pressure sensor interface; 8.2.4. Pump chamber temperature and pressure signal processing circuit; 8.3. Pump chamber temperature and pressure sensor board connector; 8.4. Pump chamber temperature and pressure sensor cable; 8.5. Fixing bracket; 8.5.1. Bracket connector slot; 8.5.2. Bracket screw hole; 8.5.3. Bracket screw; 8.6. Electrical connection; 8.6.1. Angle sensor assembly; 8.6.1.1. Angle sensor circuit; 8.6.2. Power receiving side three-phase terminal; 8.6.3. Connector; 8.6.4. Stator three-phase wire; 8.6.5. Bracket screw bushing; 8.6.6. Accommodation cavity; 8.6.7. Clip; 8.6.8. Support platform; 8.6.9. Wire harness hole; 8.7. Stator temperature sensor wire harness; 8.8. Transfer cable; 8.9. Control board cable; 9. Controller cover; 9.1. Heat sink fins; 9.2. Thermal grease; 9.3. Inner heat sink extension; 10. Sealed wet cavity; 11. Hydraulic pump; 11.1 , pump housing; 11.1.1, oil inlet plate; 11.2, rubber pad; 11.3, axial floating plate; 11.4, second gear; 11.5, first gear; 11.6, crescent plate; 11.7, floating plate; 11.8, adjustment pin; 11.9, adjustment spring; 11.10, guide pin shaft; 11.11, gear cavity bushing; 11.12, friction-reducing coating; 11.13, first fluid port; 11.14, first fluid cavity; 11.15, second fluid port; 11.16, second fluid cavity; 11.17, drive hole; 11.18, first unloading groove; 11.19, second unloading groove; 11.20, third unloading groove; 11.21, oil channel; 11.22, outlet Elastic member; 11.23, guide protrusion; 11.24, second sliding bearing; 11.25, electrical conduction block; 11.26, grounding bolt; 11.26.1, first threaded portion; 11.26.2, airtight section; 11.26.3, nut portion; 11.26.4, shock-absorbing mounting column; 11.26.5, second threaded portion; 11.27, shock-absorbing ring; 11.27.1, shock-absorbing column; 11.27.2, flange; 11.27.3, first through hole; 11.28, metal bracket; 11.29, second through hole; 11.30, grounding hole; 11.31, grounding screw; 11.32, grounding gasket; 11.33, first grounding terminal; 11.34, grounding nut 11.35. Fourth unloading groove; 11.36. Fifth unloading groove; 11.37. Third fluid chamber; 11.38. Carbon brush assembly; 11.38.1. Second grounding terminal; 11.38.2. Brush chamber; 11.38.3. Brush braid; 11.38.4. Carbon brush elastic member; 11.38.5. Carbon brush; 12. Control board; 12.1. Control unit; 12.2. Power processing unit; 12.3. Low-voltage power supply and signal interface; 12.4. Power supply interface; 12.5. Adapter; 12.6. Additional interface; 12.7. AC quick-connect spring; 12.7.1. Three-phase terminal on the power supply side; 12.7.2. Three-phase clamping portion; 12.8. Control board quick-connect connector. DETAILED DESCRIPTION

[0129] The following is a further detailed description of an active suspension electro-hydraulic pump assembly, a chassis axle, and a chassis system for a vehicle proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description.

[0130] Example 1

[0131] See Figures 1 to 8 In one embodiment, an active suspension electro-hydraulic pump assembly includes a first electro-hydraulic pump group, a second electro-hydraulic pump group, an integrated motor housing 6, a controller cover 9 and a circuit board.

[0132] The first electro-hydraulic pump group and the second electro-hydraulic pump group each include a hydraulic pump 11 and a motor for driving the hydraulic pump 11. The circuit board is used to control the first electro-hydraulic pump group and the second electro-hydraulic pump group.

[0133] The integrated motor housing 6 is configured to have two motor cavities 6.1 arranged axially and with openings at both ends, and a circuit board mounting surface 6.6 located on its circumference. The two motor cavities 6.1 are used to mount two motors respectively.

[0134] The controller cover 9 is configured to cover the circuit board mounting surface 6.6 and form a controller cavity. The circuit board is mounted in the controller cavity and parallel to the axis.

[0135] Two potting glue ports 6.3 are provided on the circuit board mounting surface 6.6. These ports extend through the bottom surfaces of the corresponding motor cavities 6.1, and are both located within the controller cavity (i.e., both ports 6.3 are located in the center of the circuit board mounting surface 6.6. During the potting process, the glue flows from the center to the left and right sides). The two potting glue ports 6.3 and the openings of the two motor cavities 6.1 are configured to coordinate with the corresponding potting tooling during the assembly process to simultaneously perform the potting and curing processes of the potting glue 7.1.

[0136] In this embodiment, an integrated motor housing 6 and a controller cover 9 are provided, and the integrated housing is provided with motor cavities 6.1 located at both ends in the axial direction. Two motors and corresponding hydraulic pumps 11 are respectively installed in the two motor cavities 6.1, and the controller cover 9 is covered on the circuit board mounting surface 6.6 of the integrated motor housing 6 to form a controller cavity for mounting the circuit board. Only sealant is provided between the controller cover 9 and the circuit board mounting surface 6.6 for connection. This reconstructs and simplifies the assembly process of the electro-hydraulic pump assembly, avoids the design of bolt-fixed connection and sealant sealing process between the dual motors, and improves the overall anti-road vibration function of the product and the sealing reliability of the product controller cavity.

[0137] In addition, this embodiment also innovatively provides two potting glue openings 6.3 on the circuit board mounting surface 6.6 that penetrate to the bottom surface of the corresponding motor cavity 6.1. The potting glue openings 6.3 can cooperate with the potting glue tooling provided thereon and the potting glue tooling inserted into the opening of the motor cavity 6.1 to realize the synchronous potting and curing processes of the dual motor cavities 6.1 when the integrated motor housing 6 is placed horizontally. The setting of the potting glue port 6.3 circumvents the limitations of the conventional potting solution for the horizontally placed integrated motor housing 6, which is to pot glue through the potting tooling at the opening of the motor cavity 6.1 (the existing potting solution for a single motor is to place the single motor housing vertically and set a potting tooling at its opening, and to provide a number of downward small-diameter potting holes on the potting tooling so that the glue can flow into the gap between the motor stator and the single motor housing through its fluidity, and perform subsequent curing operations. In addition, the glue cannot be pressed in with high pressure, because the potting tooling will be removed later, and the mating surface between the single motor housing and the tooling will also be sealed with the pump housing 11.1 of the hydraulic pump 11. High-pressure injection will cause glue to leak into the mating surface, thereby affecting the sealing effect with the pump housing 11.1. If the integrated motor housing 6 of this embodiment is potted sequentially, it is necessary to wait for the curing operation of the previous motor to cool before performing the potting operation of another motor, which takes up time. The time is long, and if you want to inject glue synchronously, the integrated motor housing 6 must be arranged horizontally. In this case, if a conventional solution is adopted, it will be necessary to open multiple L-shaped injection channels on the injection tooling corresponding to the opening, and based on the fluidity of the glue, it is necessary to make the output port of the L-shaped injection channel as far as possible above the motor cavity 6.1. This solution is difficult to implement and the injection effect is poor. However, the injection glue port 6.3 of this embodiment is directly opened on the circuit board mounting surface 6.6, that is, above the motor cavity 6.1. The glue can flow smoothly between the stator and the motor cavity 6.1, and there is no need to open an L-shaped injection channel on the corresponding injection tooling), and the dual motors can be fixed synchronously in the corresponding motor cavity 6.1, avoiding the need to inject glue and cure the two motors in sequence, optimizing the assembly process of the motor part, and making the electro-hydraulic pump assembly solution using the integrated motor housing 6 feasible and cost-effective.

[0138] Furthermore, the potting glue port 6.3 of this embodiment is located within the controller cavity, that is, within the sealed area formed by the controller cover 9 and the circuit board mounting surface 6.6 (the plane where the two are joined is sealed and closed with an annular sealant to prevent external media from entering the internal cavity enclosed by the two and affecting the operation of the controller and other circuits). Therefore, there is no need to provide an additional sealing structure for the potting glue port 6.3.

[0139] The active suspension electro-hydraulic pump assembly of this embodiment is further described below:

[0140] See Figure 5 and Figure 6 In this embodiment, the aforementioned circuit board can be specifically a control board 12. Furthermore, the control board 12 is provided with a signal processing unit, a control unit 12.1, and a power processing unit 12.2. The power processing unit 12.2 is disposed on the surface of the control board 12 facing away from the motor, and heat generated by the power processing unit 12.2 is configured to be transferred to the controller cover 9 for dissipation.

[0141] That is, this embodiment sets the circuit board as the control board 12, and the control unit 12.1 controls the dual motors, and innovatively sets the heat dissipation path of the heat-generating components such as the power processing unit 12.2 on the control board 12 to dissipate heat upward through the controller cover 9, thereby avoiding the existing conventional solution of dissipating heat downward to the motor to dissipate heat through the fluid circulating inside the motor, reconstructing the heat dissipation path of the assembly controller, and fully reducing the requirements for the heat resistance selection of controller components, thereby reducing costs and improving the heat resistance level of the entire machine.

[0142] See Figure 3 and Figure 4 In this embodiment, the integrated motor housing 6 can also be configured to include an intermediate cavity 6.2 located between the two motor cavities 6.1. Intermediate cavity 6.2 communicates with the controller cavity and houses signal relay control units 8.1 corresponding to the two motors. Signal relay control units 8.1 are configured to collect preset parameter data sets, integrate them, and relay them to the circuit board.

[0143] Specifically, the signal relay control unit 8.1 includes a fixed bracket 8.5 and two electrical connectors 8.6. The fixed bracket 8.5 is mounted in the intermediate cavity 6.2 and has a first and second accommodating portions positioned opposite each other. The two electrical connectors 8.6 are respectively inserted into the first and second accommodating portions. Each of the two electrical connectors 8.6 is equipped with a Hall effect sensor that matches the corresponding motor shaft 2.1.

[0144] The two electrical connectors 8.6 are each connected to the circuit board via a control board cable 8.9. Specifically, each control board cable 8.9 can be plugged into a signal socket on the circuit board. Alternatively, the two electrical connectors 8.6 are connected via a transfer cable 8.8, with one of the electrical connectors 8.6 connected to the circuit board via a control board cable 8.9. This means that the signals from the two electrical connectors 8.6 are aggregated and output to the circuit board via a single control board cable 8.9.

[0145] The signal transmission between the detection module and the upper control assembly is realized through the signal relay control unit 8.1. The mixed signal relay processing components are arranged in the space inside the motor. The temperature and pressure sensor signals in the pump head component and the motor stator temperature sensor signal are first connected to the angle sensor component 8.6.1 through a cable. It is fixed in the motor sub-assembly housing through a fixed bracket 8.5 to form an integrated component structure. The controller is provided with a control board quick-connect connector 12.8. Only one quick-connect cable is required for connection, which facilitates the assembly of the controller and the motor sub-assembly, solves the cumbersome assembly problem of traditional cable connection, and greatly reduces the risk of signal loss under harsh vibration conditions. This solves the problems of the prior art in the assembly process of the controller and the motor sub-assembly, which is cumbersome, time-consuming, error-prone, and space-consuming, and can simultaneously achieve assembly convenience and reliability after assembly. The fixed bracket 8.5 provides a first accommodating portion and a second accommodating portion to facilitate the installation of the two electrical connection parts 8.6. The compact design saves installation space and is particularly suitable for restricted environments such as vehicle chassis. The two electrical connection parts 8.6 are respectively embedded in the receiving parts of the fixing bracket 8.5 to avoid exposed wiring and improve the stability and impact resistance of the overall structure.

[0146] Furthermore, electrical connection portion 8.6 is configured to electrically connect to pump cavity temperature and pressure sensor board 8.2 mounted on the corresponding hydraulic pump 11 via pump cavity temperature and pressure sensor cable 8.4. A cable opening 6.7 is defined on the side of circuit board mounting surface 6.6 closest to the corresponding hydraulic pump 11 (located away from the aforementioned molding area). Pump cavity temperature and pressure sensor cable 8.4 is configured to connect to pump cavity temperature and pressure sensor board 8.2 via a slot in cable opening 6.7.

[0147] In this embodiment, the setting of the intermediate cavity 6.2 also allows the above-mentioned potting glue port 6.3 to be further extended to the side of the intermediate cavity 6.2 corresponding to the motor cavity 6.1, so that the corresponding potting tool can be inserted into the intermediate cavity 6.2 to form a potting glue buffer cavity located between the potting tool, the potting glue port 6.3, and the motor stator. The glue can be buffered after entering the potting glue buffer cavity, and the glue entering and contained in the potting glue buffer cavity can gradually flow to the space between the motor stator and the motor cavity 6.1 body under the action of its own gravity, and can more evenly fill the potting glue cavity formed by the two potting tools and the motor stator and the motor cavity 6.1 body. After being filled, the glue inside can be solidified to form a potting glue 7.1 for heat dissipation and structural fixation.

[0148] See Figure 47 and Figure 48In this embodiment, the electrical connection portion 8.6 is provided with a receiving-side three-phase terminal 8.6.2, which is electrically connected to the three-phase port of the corresponding motor. The circuit board is provided with a power supply-side three-phase terminal 12.7.1 that matches the two receiving-side three-phase terminals 8.6.2.

[0149] Among them, the three-phase terminal 12.7.1 on the power supply side is provided with a three-phase clamping part 12.7.2, and the three-phase terminal 8.6.2 on the power receiving side is configured to be inserted into the three-phase clamping part 12.7.2. Based on the clamping effect of the three-phase clamping part 12.7.2, the three-phase terminal 12.7.1 on the power supply side and the three-phase terminal 8.6.2 on the power receiving side are fixedly connected, and the three-phase terminal 8.6.2 on the power receiving side is electrically connected to the three-phase port of the corresponding motor, thereby forming the entire circuit path.

[0150] See Figure 7 and Figure 8 In this embodiment, the hydraulic pump 11 can be an internal gear pump. The internal gear pump can employ an involute tooth profile or a linear conjugate tooth profile. The linear conjugate tooth profile can better reduce the problem of oil trapping, improve meshing smoothness and gear reliability and lifespan, and reduce noise caused by gear meshing.

[0151] Furthermore, to address the issue of bearing corrosion caused by shaft current, this embodiment further provides an elastic conductive structure in the axial gap between the rotating shaft 2.1 and the oil inlet plate 11.1.1 of the pump housing 11.1 (the pump housing 11.1 includes the connected oil inlet plate 11.1.1 and the oil outlet plate 5). A grounding structure connected to an external ground terminal is also provided on the oil inlet plate 11.1.1. The elastic conductive structure is configured to be clamped between the oil inlet plate 11.1.1 and the axial end surface of the rotating shaft 2.1 in a predetermined compressed state. The axial expansion and contraction of the elastic conductive structure in this predetermined compressed state is greater than the axial movement of the rotating shaft 2.1. This forms an axial current extraction path formed by the elastic conductive structure, oil inlet plate 11.1.1, and grounding structure. The axial expansion and contraction of the elastic conductive structure compensates for the axial movement of the rotating shaft 2.1, ensuring that the shaft current can be consistently extracted.

[0152] Example 2

[0153] See Figures 9 to 29 This embodiment further explains the motor part based on the above embodiment 1:

[0154] The motor cavity 6.1 of this embodiment is provided on the integrated motor housing 6. The motor is provided in the motor cavity 6.1. The potting compound 7.1 is provided in the motor cavity 6.1 and is located between the motor and the motor cavity 6.1 (specifically, between the stator module 1 and the motor cavity 6.1). A potting compound port 6.3 is provided on the side wall of the integrated motor housing 6, which connects the potting compound 7.1 and the outside of the integrated motor housing 6, and the motor cavities 6.1 in the two motors respectively have corresponding potting compound ports 6.3. The potting compound 7.1 closes the potting compound port 6.3, and the three-phase wires of the stator in the motor pass through the potting compound 7.1 and are electrically connected to the signal relay control unit 8.1 in the intermediate cavity 6.2.

[0155] The two motors are mounted on the same integrated motor housing 6. Compared with the prior art solution of mounting the two motors in separate housings and then connecting the two separate housings together, this saves the steps of positioning, assembling, and connecting the two separate housings.

[0156] The electric motor of this embodiment includes a stator module 1, a rotor module 2, and a bearing base 3. The bearing base 3 and the corresponding hydraulic pump 11 are sealedly connected to both ends of the stator module 1 and cooperate to form a sealed wet chamber 10 that communicates with the pump chamber of the hydraulic pump 11. The rotating shaft 2.1 of the rotor module 2 is rotatably connected to the bearing base 3 and the hydraulic pump 11, and the rotating shaft 2.1 is drivingly connected to the pump head assembly of the hydraulic pump 11.

[0157] The stator module 1 of this embodiment is further described below:

[0158] The stator module 1 includes a stator tooth component 1.1, a stator yoke 1.2, a stator winding, a glue potting layer 1.5, an injection molding layer 1.6, a temperature detection unit 1.7 and two support sleeves 1.8.

[0159] The stator winding includes several insulating frames 1.3 and coils 1.4. The several insulating frames 1.3 (specifically, in this embodiment, 100 insulating frames 1.3) are laid flat on a winding tool, and then the coils 1.4 are wound around the insulating frames 1.3 to form the stator winding.

[0160] The stator teeth component 1.1 includes a plurality of stator teeth 1.1.1, which are evenly distributed along the circumference of the stator module 1. A reinforcing rib 1.1.2 is provided between two adjacent stator teeth 1.1.1 to connect them. Specifically, Figure 18As shown, a stator tooth 1.1.1 comprises a tooth portion 1.1.1.1 and a first connecting portion 1.1.1.2. The radially inner side of the tooth portion 1.1.1.1 (the radial direction here refers to the radial direction of the stator module 1) is connected to the first connecting portion 1.1.1.2. A gap exists between the first connecting portions 1.1.1.2 of two adjacent stator teeth 1.1.1. The reinforcing ribs 1.1.2 are located in this gap, and the ends of the reinforcing ribs 1.1.2 are connected to the first connecting portions 1.1.1.2 of the stator teeth 1.1.1 on either side. The gap formed between the first connecting portions 1.1.1.2 of two adjacent stator teeth 1.1.1 contains multiple reinforcing ribs 1.1.2 spaced apart along the axis of the stator module 1. The reinforcing ribs 1.1.2 are located in the radially outer area of ​​the gap. In this embodiment, the width of the reinforcing ribs 1.1.2 can be set to approximately 0.5 mm to reduce stator magnetic flux leakage.

[0161] The stator winding is connected to the stator tooth assembly 1.1, specifically the tooth portion 1.1.1.1 of the stator tooth 1.1.1 within the stator tooth assembly 1.1. During assembly, the wound insulating frame 1.3 is rolled and inserted onto the stator tooth 1.1.1 within the stator tooth assembly 1.1, thereby assembling the stator winding to the stator tooth assembly 1.1. After assembly, preferably there is no gap between the insulating frame 1.3 and the stator tooth 1.1.1. However, to facilitate assembly, in this embodiment, the gap between the insulating frame 1.3 and the stator tooth 1.1.1 is designed to be approximately 0.01 mm.

[0162] The stator yoke 1.2 is sleeved and connected to the outside of the stator tooth component 1.1. The radially outward-facing surface of the stator tooth 1.1.1 (the radial direction here refers to the radial direction of the stator module 1) and the inner sidewall of the stator yoke 1.2 are each provided with a second protrusion 1.1.1.3, and the other is provided with a corresponding second groove 1.2.1. The second protrusion 1.1.1.3 is received in the second groove 1.2.1. Specifically, in this embodiment, the second protrusion 1.1.1.3 is provided on the radially outward-facing surface of the tooth portion 1.1.1.1 of the stator tooth 1.1.1, and the corresponding second groove 1.2.1 is provided on the inner sidewall of the stator yoke 1.2. Furthermore, the second protrusion 1.1.1.3 can be configured so that its circumferential length increases radially outward, and the shape of the second groove 1.2.1 is adapted to match the second protrusion 1.1.1.3. This allows for a tighter connection between the stator tooth 1.1.1 and the stator yoke 1.2. Furthermore, the shape of one of the second protrusions 1.1.1.3 is designed to another shape, and the shape of the second groove 1.2.1 corresponding to the second protrusion 1.1.1.3 is changed accordingly, so that the positions of the stator yoke 1.2 and the stator tooth component 1.1 in the circumferential direction can be positioned.

[0163] After the stator winding is assembled onto the stator tooth assembly 1.1, the stator yoke 1.2 and stator tooth assembly 1.1 can be assembled by press-fitting. The provision of the second protrusion 1.1.1.3 and the second groove 1.2.1 further ensures proper alignment between the stator tooth assembly 1.1 and the stator yoke 1.2. After the stator yoke 1.2 and stator tooth assembly 1.1 are assembled, it is preferable that there is no gap between the second protrusion 1.1.1.3 and the second groove 1.2.1. However, to facilitate assembly, in this embodiment, the clearance between the second protrusion 1.1.1.3 and the second groove 1.2.1 is designed to be approximately 0.05 mm.

[0164] After the stator yoke 1.2 and stator tooth assembly 1.1 are assembled, one of the support sleeves 1.8 is press-fitted from one axial end of the stator module 1 into the insulating frame 1.3, with one axial end face of the support sleeve 1.8 abutting the first connection portion 1.1.1.2 of the stator tooth assembly 1.1. A temperature sensing unit 1.7 (specifically, a temperature sensor in this embodiment) is then embedded in the coil 1.4 (this embodiment includes two temperature sensing units 1.7, each embedded in the coil 1.4 in the two insulating frames 1.3), such that the temperature sensing units 1.7 are in contact with the coil 1.4. The stator tooth assembly 1.1, stator yoke 1.2, insulating frame 1.3, coil 1.4, and one of the support sleeves 1.8 are then glued using a glue potting tool to form a glue potting layer 1.5, thus integrating the components into a single unit. The temperature detection unit 1.7 is located in the coil 1.4 of the stator winding, and the electrical connection line electrically connected to the temperature detection unit 1.7 extends out of the glue layer 1.5 ( Figure 22 The reference numerals in the figure actually refer to electrical connection lines connected to the temperature detection unit 1.7. The temperature detection unit 1.7 is used to detect the temperature of the stator phase line (ie, the coil 1.4).

[0165] Next, another support sleeve 1.8 is press-fitted onto the entire stator module 1 from the other axial end thereof. A molded layer 1.6 is then formed on the inner sidewall of the molded layer 1.5 by injection molding (with both ends of the molded layer 1.6 extending to cover both support sleeves 1.8). In this embodiment, the injection molding material is preferably LCP or PPA. Other injection molding materials may also be used in other embodiments. The inner wall of the molded layer 1.6 forms the stator inner wall 1.6.2. In this embodiment, the thickness of the molded layer 1.6 is preferably approximately 0.7 mm to ensure that the stator inner wall 1.6.2 forms a dense layer of plastic.

[0166] After injection molding, the stator module 1 comprises an injection-molded stator inner wall 1.6.2. Support sleeves 1.8 are positioned radially outward of the stator inner wall 1.6.2 at each axial end of the stator module 1. Specifically, two support sleeves 1.8 are inserted from either end of the stator module 1, positioned between the injection-molded layer 1.6 and the glue-filled layer 1.5. One axial end face of each support sleeve 1.8 abuts the first connection portion 1.1.1.2 of the stator tooth component 1.1. When assembled with other components (specifically, the bearing base 3 and the oil outlet plate 5), the primary connection is at the ends of the stator inner wall 1.6.2. Therefore, the two support sleeves 1.8 provide support for the injection-molded layer 1.6, thereby enhancing the structural strength of the stator module 1. In this embodiment, the support sleeves 1.8 can be made of steel, although other materials are also possible in other embodiments.

[0167] Because the reinforcing rib 1.1.2 is located in the radially outer region of the gap formed between the first connecting portions 1.1.1.2 of two adjacent stator teeth 1.1.1, the radially inner region of the gap is left empty. This empty portion allows for the formation of first grooves 1.5.1 on the inner sidewall of the glue layer 1.5 during glue pouring. Specifically, the inner sidewall of the glue layer 1.5 is provided with a plurality of first grooves 1.5.1. Consequently, when the molded layer 1.6 is formed by injection molding, first protrusions 1.6.1 are formed within the first grooves 1.5.1. Specifically, the outer sidewall of the molded layer 1.6 is provided with a plurality of first protrusions 1.6.1 corresponding to the plurality of first grooves 1.5.1, and the first protrusions 1.6.1 are accommodated within the corresponding first grooves 1.5.1. The arrangement of the first protrusion 1.6.1 and the first groove 1.5.1 can prevent the injection layer 1.6 and the glue potting layer 1.5 from circumferential rotation after the injection molding is completed.

[0168] The bearing base 3 of this embodiment is further described below:

[0169] Bearing base 3 is sealably mounted on one end of stator inner wall 1.6.2. Hydraulic pump 11, part of the active suspension electro-hydraulic pump, is sealably mounted on the other end of stator inner wall 1.6.2. Specifically, oil outlet plate 5 in hydraulic pump 11 extends into and seals the other end of stator inner wall 1.6.2. Stator inner wall 1.6.2, bearing base 3, and oil outlet plate 5 cooperate to form a sealed wet chamber 10.

[0170] The bearing base 3 includes a cover plate 3.1 and a side wall portion 3.2. The side wall portion 3.2 is connected to the end surface of the cover plate 3.1 facing the oil outlet plate 5. The end of the side wall portion 3.2 not connected to the cover plate 3.1 extends into the stator inner wall 1.6.2 and is connected to the stator inner wall 1.6.2. Specifically, Figure 13 and Figure 15 As shown, two grooves for the first sealing ring 3.3 are provided on the outer wall of the sidewall portion 3.2. The two first sealing rings 3.3 are installed in the grooves, respectively. The first sealing rings 3.3 and the stator inner wall 1.6.2 are sealed via an interference fit, ensuring a compression ratio of the first sealing ring 3.3 between 15% and 30%. After the sidewall portion 3.2 of the bearing base 3 and the stator inner wall 1.6.2 are installed, the first sealing ring 3.3 is positioned at the corresponding position of the support sleeve 1.8. That is, within the radial cross-section (radial here refers to the radial direction of the stator module 1) of the first sealing ring 3.3, the support sleeve 1.8 is located radially outward of the first sealing ring 3.3. The support sleeve 1.8 supports the injection molded layer 1.6, preventing deformation of the inner wall of the injection molded layer 1.6 due to temperature fluctuations, which could affect the compression ratio of the first sealing ring 3.3 (and also the compression ratio of the second sealing ring 5.1 on the oil outlet plate 5, described below). Preferably, injection-molded chamfers 1.6.3 are provided at both ends of the stator inner wall 1.6.2, so that the first sealing ring 3.3 will not be cut during the press-fitting process (the injection-molded chamfer 1.6.3 at the end that cooperates with the oil outlet plate 5 is used to prevent the second sealing ring 5.1 on the oil outlet plate 5 from being cut during the press-fitting process).

[0171] The rotor module 2 of this embodiment is further described below:

[0172] The rotor module 2 comprises a silicon steel sheet assembly 2.2, several magnets 2.3, an injection molded part 2.4, a rotating shaft 2.1, a magnetic ring 2.7, a thrust washer 2.6, and a fixed sleeve 2.8. The rotor module 2 is housed within a sealed wet chamber 10. The rotating shaft 2.1 extends through the oil outlet plate 5 and into the hydraulic pump 11. Except for a portion of the rotating shaft 2.1 that extends through the oil outlet plate 5 and out of the sealed wet chamber 10, the remainder of the rotor module 2 remains within the sealed wet chamber 10.

[0173] The silicon steel sheet assembly 2.2 is formed by stacking several silicon steel sheets. Several magnetic steel slots 2.2.1 are distributed throughout the silicon steel sheet assembly 2.2, with magnets 2.3 located within these slots. These slots 2.2.1 are evenly distributed along the circumference of the rotor module 2. There is a one-to-one correspondence between each magnet 2.3 and slot 2.2.1, with each magnet 2.3 located within a corresponding slot 2.2.1.

[0174] The injection molded part 2.4 includes several filling portions 2.4.1 and second connecting portions 2.4.2 located at the ends of the silicon steel sheet assembly 2.2 (the two ends here refer to the ends in the axial direction of the rotor module 2). The silicon steel sheet assembly 2.2 is provided with several injection holes, and the filling portions 2.4.1 fill the injection holes. The two ends of the filling portion 2.4.1 are respectively connected to the second connecting portions 2.4.2.

[0175] Specifically, the magnetic steel 2.3 can be press-fitted into the corresponding magnetic steel slot 2.2.1 on the silicon steel sheet assembly 2.2 by clearance fitting, and then formed into the injection molded part 2.4 by injection molding, so that the injection molded part 2.4, the silicon steel sheet assembly 2.2 and the magnetic steel 2.3 form a whole.

[0176] Specifically, the magnetic steel slot 2.2.1 on the silicon steel sheet assembly 2.2 restricts all degrees of freedom of the magnetic steel 2.3 therein except in the axial direction of the rotor module 2. The two ends of the silicon steel sheet assembly 2.2 and the two ends of the magnetic steel 2.3 respectively abut the two second connecting portions 2.4.2 of the injection molded part 2.4, preventing the injection molded part 2.4, the silicon steel sheet assembly 2.2, and the magnetic steel 2.3 from moving in the axial direction of the rotor module 2. Moreover, the injection molded part 2.4 is formed by injection molding, so that even if there is a gap between the magnetic steel slot 2.2.1 and the magnetic steel 2.3, the gap is filled by the injection molded part 2.4. Forming the injection molded part 2.4 by injection molding can add an injection molded portion to the weak points of the overall structure composed of the silicon steel sheet assembly 2.2 and the magnetic steel 2.3, thereby enhancing the overall structural strength of the rotor module 2.

[0177] Preferably, the intersection of two planes in the inner wall of the magnetic steel slot 2.2.1 is recessed inward to form a clearance groove 2.2.2. In this embodiment, the magnetic steel 2.3 is generally rectangular. If the four sharp corners of the rectangular cross-section come into contact with the inner wall of the magnetic steel slot 2.2.1 during installation, the magnetic steel 2.3 can be easily damaged. To this end, the portions of the magnetic steel slot 2.2.1 corresponding to these four sharp corners (i.e., the intersection of the two planes in the magnetic steel slot 2.2.1) are provided with a clearance groove 2.2.2 to avoid the sharp points of the magnetic steel 2.3, making it less likely to collide with the silicon steel sheet assembly 2.2, and ensuring the integrity of the magnetic steel 2.3 after it is press-fitted into the silicon steel sheet assembly 2.2. After the injection molding process forms the injection molded part 2.4, the gaps within the clearance groove 2.2.2 will be filled by the injection molded part 2.4, thereby preventing it from becoming a weak point in the structural strength of the rotor component.

[0178] The types of injection holes on the silicon steel sheet assembly 2.2 mainly include the first injection hole 2.2.3, the second injection hole 2.2.4, and the above-mentioned air-avoidance groove 2.2.2.

[0179] The first injection molding hole 2.2.3 is located between two adjacent magnetic isolation bridges 2.2.5 of the silicon steel sheet assembly 2.2, and the surfaces facing each other between the two adjacent magnetic isolation bridges 2.2.5 are respectively the inner side walls of the first injection molding hole 2.2.3 located between the two adjacent magnetic isolation bridges 2.2.5. The width of the magnetic isolation bridge 2.2.5 is generally small, so the magnetic isolation bridge 2.2.5 becomes the structural weakness of the silicon steel sheet assembly 2.2 and the magnetic steel 2.3 as a whole. The presence of the first injection molding hole 2.2.3 allows the first injection molding hole 2.2.3 to be filled with the filling portion 2.4.1 of the injection molding part 2.4 after the injection molding is performed to form the injection molded part 2.4. In this way, the two side surfaces of the magnetic isolation bridge 2.2.5 are respectively in contact with the filling portions 2.4.1 in the first injection molding holes 2.2.3 on both sides, and the filling portions 2.4.1 on both sides support the magnetic isolation bridge 2.2.5. The filling portion 2.4.1 within the first injection hole 2.2.3 prevents the magnetic isolation bridge 2.2.5 from becoming a structural weakness of the rotor module 2, thereby reducing the width of the magnetic isolation bridge 2.2.5 and further reducing the rotor magnetic leakage coefficient. In this embodiment, the width of the magnetic isolation bridge 2.2.5 is preferably about 0.5 mm.

[0180] Specifically, each first injection hole 2.2.3 corresponds to each magnetic steel slot 2.2.1. The first injection hole 2.2.3 is located radially inward of the magnetic steel slot 2.2.1 (the radial direction here refers to the radial direction of the rotor module 2), and the first injection hole 2.2.3 is connected to the corresponding magnetic steel slot 2.2.1. Furthermore, the magnetic steel slot 2.2.1 can be open radially outward, that is, the radially outer sidewall of the magnetic steel slot 2.2.1 is provided with a channel 2.2.7 that connects to the outer wall surface of the silicon steel sheet assembly 2.2.

[0181] The second injection hole 2.2.4 is located between two adjacent magnetic steel slots 2.2.1 and is mainly used to make the combination of the silicon steel sheet assembly 2.2 and the injection molded part 2.4 tighter, and to connect the two second connecting parts 2.4.2 so that the injection molded part 2.4 itself is inseparable.

[0182] Several dynamic balancing holes 2.4.2.1 are provided on the second connecting portion 2.4.2, and dynamic balancing members 2.5 are installed in at least one of these holes. After the magnets 2.3 are press-fitted onto the silicon steel sheet assembly 2.2 and then injection-molded to form a unit comprising the silicon steel sheet assembly 2.2, the magnets 2.3, and the molded part 2.4, the unit may have a center of gravity that is not in the designed position. In this case, dynamic balancing members 2.5 can be installed in appropriately located dynamic balancing holes 2.4.2.1 to bring the unit's center of gravity back to the designed position, thereby dynamically balancing the rotor module 2.

[0183] Preferably, the second connecting portion 2.4.2 can be configured as a disc as a whole, the dynamic balancing holes 2.4.2.1 on the second connecting portion 2.4.2 can be evenly distributed along the circumference of the rotor module 2, the dynamic balancing holes 2.4.2.1 can be circular holes, and the dynamic balancing member 2.5 can be a steel ball, which can be assembled into the dynamic balancing hole 2.4.2.1 by interference fitting.

[0184] The rotor module 2 has improved structural strength through injection molding, and is dynamically balanced by pressing steel balls, avoiding the foreign matter problem caused by the deweighting method and the risk of traditional dynamic balancing mud falling off.

[0185] Silicon steel sheet assembly 2.2 is provided with a shaft hole 2.2.6. Shaft 2.1 passes through shaft hole 2.2.6 and is fixedly connected to silicon steel sheet assembly 2.2. Specifically, shaft 2.1 is machined with a knurled structure, which creates an interference fit with shaft hole 2.2.6 in silicon steel sheet assembly 2.2. The connection between shaft 2.1 and shaft hole 2.2.6 can be accomplished through interference fit or frozen assembly.

[0186] The end of the rotating shaft 2.1 that extends into the hydraulic pump 11 is the driving end, while the end of the rotating shaft 2.1 located within the sealed wet chamber 10 is the non-driving end. A thrust washer 2.6, a magnetic ring 2.7, and a fixed sleeve 2.8 are disposed at the non-driving end of the rotating shaft 2.1. The fixed sleeve 2.8 is connected to the non-driving end of the rotating shaft 2.1. Both the thrust washer 2.6 and the magnetic ring 2.7 are located within the fixed sleeve 2.8, with the thrust washer 2.6 positioned between the non-driving end face of the rotating shaft 2.1 and the magnetic ring 2.7. The connection between the fixed sleeve 2.8 and the rotating shaft 2.1 compresses and secures the magnetic ring 2.7 to the non-driving end face of the rotating shaft 2.1 via the thrust washer 2.6. The thrust washer 2.6 generates a spring force when compressed, ensuring that the magnetic ring 2.7 is pressed against the non-driving end face of the rotating shaft 2.1. Furthermore, it prevents the magnetic ring 2.7 from fracturing during compression. In this embodiment, the thrust pad 2.6 can be made of a rubber material, the magnetic ring 2.7 can be made of a neodymium iron boron material, and the fixing sleeve 2.8 can be made of a SUS non-magnetic material.

[0187] Specifically, an annular groove 2.1.1 is provided on the non-drive end surface of the rotating shaft 2.1, and a fixed sleeve 2.8 extends into the annular groove 2.1.1. The portion of the non-drive end surface of the rotating shaft 2.1 located within the annular groove 2.1.1 cooperates with the fixed sleeve 2.8 to form a housing space, within which the thrust washer 2.6 and the magnetic ring 2.7 are located. The outer wall of the magnetic ring 2.7 and the inner wall of the fixed sleeve 2.8 are provided with corresponding flattened portions. During installation, the flattened portions of the magnetic ring 2.7 are aligned with those of the fixed sleeve 2.8 and the fixed sleeve 2.8, after which the magnetic ring 2.7 is placed into the fixed sleeve 2.8. The thrust washer 2.6 is then placed into the fixed sleeve 2.8, and the fixed sleeve 2.8, along with the magnetic ring 2.7 and thrust washer 2.6, is press-fitted onto the rotating shaft 2.1. The inner wall of the fixed sleeve 2.8 and the radially outward sidewall of the annular groove 2.1.1 form an interference fit, with the interference fit being approximately 0.03 mm in this embodiment.

[0188] The rotating shaft 2.1 has an inner hole, and an oil outlet hole 2.1.2 is provided on the outer wall of the rotating shaft 2.1, which is connected to the inner hole. The portion of the rotating shaft 2.1 located within the sealed wet chamber 10 and the portion extending into the hydraulic pump 11 are both provided with oil outlet holes 2.1.2. In other words, oil outlet holes 2.1.2 are provided on both the driving end and the non-driving end of the rotating shaft 2.1. Oil can flow through the inner hole of the rotating shaft 2.1 and flow in or out through the oil outlet holes 2.1.2. This allows the oil in the hydraulic pump 11 in the active suspension electro-hydraulic pump to flow into the sealed wet chamber 10. The oil entering the sealed wet chamber 10 can cool the rotor module 2 and the stator module 1, while also lubricating the rolling bearing 4.1 in the sealed wet chamber 10. Specifically, in this embodiment, two oil outlet holes 2.1.2 are provided on the driving end of the rotating shaft 2.1, and one oil outlet hole 2.1.2 is provided on the non-driving end of the rotating shaft 2.1.

[0189] The rotor module 2 is mounted via a rotating shaft 2.1. The drive end of the rotating shaft 2.1 passes through an oil outlet plate 5 and is rotatably connected to the oil outlet plate 5. Specifically, a first sliding bearing 5.3 can be disposed between the rotating shaft 2.1 and the through-hole in the oil outlet plate 5 through which the rotating shaft 2.1 passes. The outer ring of the first sliding bearing 5.3 is installed in the through-hole of the oil outlet plate 5 via an interference fit, and the rotating shaft 2.1 is rotatably connected to the inner ring of the first sliding bearing 5.3. The non-drive end of the rotating shaft 2.1 is mounted on the bearing base 3 via a bearing module 4.

[0190] Bearing module 4 includes a rolling bearing 4.1, a bearing seat 4.2, a retaining spring 4.3, a C-spring 4.4, and a leaf spring 4.5. The non-driven end of rotating shaft 2.1 is mounted on the inner ring of rolling bearing 4.1, rolling bearing 4.1 is mounted on bearing seat 4.2, and bearing seat 4.2 is mounted on bearing base 3. For ease of description, the direction along the axis of rotating shaft 2.1 and from the driven end to the non-driven end is referred to as the first direction, and the direction along the axis of rotating shaft 2.1 and from the non-driven end to the driven end is referred to as the second direction.

[0191] The bearing modules 4 are all located in the sealed wet chamber 10. The rolling bearings 4.1 can be open bearings that are lubricated by the oil in the sealed wet chamber 10.

[0192] The inner ring of rolling bearing 4.1 is fixed to the non-drive end of rotating shaft 2.1 through an interference fit. The outer wall of the non-drive end of rotating shaft 2.1 is provided with a stepped surface 2.1.3 and a retaining spring groove 2.1.4. These stepped surface 2.1.3 and retaining spring groove 2.1.4 are spaced apart along the axis of rotating shaft 2.1. Retaining springs 4.3 are installed in retaining spring groove 2.1.4. The end faces of the inner ring of rolling bearing 4.1 abut against the stepped surface 2.1.3 and retaining spring 4.3, respectively. The stepped surface 2.1.3 and retaining spring 4.3 cooperate to limit the axial position of rolling bearing 4.1 on rotating shaft 2.1, preventing axial movement between rotating shaft 2.1 and rolling bearing 4.1. Specifically, in this embodiment, the stepped surface 2.1.3 faces a first direction. The end face of the inner ring of rolling bearing 4.1 facing a second direction abuts the stepped surface 2.1.3, while the end face of the inner ring of rolling bearing 4.1 facing the first direction abuts the retaining spring 4.3. Thus, the inner ring of the rolling bearing 4.1 is fixedly connected to the rotating shaft 2.1. The circlip 4.3 can be assembled in the circlip groove 2.1.4 by clamping the circlip 4.3.

[0193] The bearing seat 4.2 extends into and fits within the sidewall portion 3.2 of the bearing base 3. A C-spring groove 4.2.1 is provided on the outer wall of the bearing seat 4.2 and / or the inner wall of the bearing base 3. A C-spring 4.4 is mounted within this groove. Specifically, in this embodiment, the C-spring groove 4.2.1 is provided on the outer wall of the bearing seat 4.2. The inner ring of the C-spring 4.4 contacts the bottom of the groove 4.2.1, while the outer ring of the C-spring 4.4 contacts the inner wall of the sidewall portion 3.2 of the bearing base 3. Ideally, there is no gap between the outer wall of the bearing seat 4.2 and the inner wall of the side wall portion 3.2 of the bearing base 3. However, to facilitate press-fitting the bearing seat 4.2 into the side wall portion 3.2 of the bearing base 3, the gap between the outer wall of the bearing seat 4.2 and the inner wall of the side wall portion 3.2 of the bearing base 3 is designed to be approximately 0.02 mm. To further secure the bearing seat 4.2 and the bearing base 3, a C-spring 4.4 is provided. This completes the fixed connection between the bearing seat 4.2 and the bearing base 3.

[0194] The inner sidewall of bearing seat 4.2 is interference-fitted with the outer sidewall of the outer ring of rolling bearing 4.1. Bearing seat 4.2 has a first mounting surface 4.2.2 facing the first direction, and bearing base 3 has a second mounting surface 3.1.1 facing the second direction. Second mounting surface 3.1.1 is a portion of the end surface of cover plate 3.1 facing the second direction and is located within sidewall portion 3.2. First mounting surface 4.2.2 abuts the end surface of the outer ring of rolling bearing 4.1 facing the second direction, while a leaf spring 4.5 is provided between second mounting surface 3.1.1 and the end surface of the outer ring of rolling bearing 4.1 facing the first direction. Alternatively, a leaf spring 4.5 may be provided between first mounting surface 4.2.2 and the end surface of the outer ring of rolling bearing 4.1 facing the second direction, while second mounting surface 3.1.1 abuts the end surface of the outer ring of rolling bearing 4.1 facing the first direction. This secures the outer ring of rolling bearing 4.1 to bearing seat 4.2.

[0195] The non-driving end of the rotating shaft 2.1 extends into the side wall portion 3.2 of the bearing base 3. Furthermore, a clearance groove 3.1.2 is provided on the end surface of the cover plate 3.1 facing the oil outlet plate 5 (i.e., a clearance groove 3.1.2 is provided on the end surface of the cover plate 3.1 facing the second direction and located within the side wall portion 3.2), and the magnetic ring 2.7 is at least partially located within the clearance groove 3.1.2. A detection device for cooperating with the magnetic ring 2.7 to detect and obtain the rotation status of the rotating shaft 2.1 is provided outside the end surface of the cover plate 3.1 facing the first direction. In order for the magnetic ring 2.7 to cooperate with the detection device, the distance between the two needs to be controlled and cannot be too far. However, the cover plate 3.1 as a whole cannot be too thin, so the clearance groove 3.1.2 is provided to reduce the thickness of the cover plate 3.1 corresponding to the magnetic ring 2.7. In this embodiment, after the rotating shaft 2.1, the bearing module 4 and the bearing base 3 are assembled, the distance between the magnetic ring 2.7 and the end surface of the cover plate 3.1 facing the second direction is about 2.5 mm.

[0196] The two motors are coaxially arranged within the two motor cavities 6.1 of the integrated motor housing 6. The integrated motor housing 6 also includes an intermediate cavity 6.2, which houses the signal relay control unit 8.1 for the active suspension electro-hydraulic pump. The intermediate cavity 6.2 is located between the two motor cavities 6.1. The motor cavities 6.1 are primarily used to house the motors, and therefore have an overall cylindrical shape.

[0197] Part of the outer wall of the integrated motor housing 6 forms a circuit board mounting surface 6.6. This surface is provided with a mounting slot 6.6.1 for mounting the control board 12 of the active suspension electro-hydraulic pump assembly. The intermediate cavity 6.2 is provided with an intermediate cavity opening 6.4 that connects to the circuit board mounting surface 6.6. This intermediate cavity opening 6.4 is located within the mounting slot 6.6.1 of the circuit board mounting surface 6.6.

[0198] Preferably, the potting glue ports 6.3 corresponding to the two motor cavities 6.1 are located on the same circumferential side of the integrated motor housing 6. Furthermore, the potting glue ports 6.3 communicating with the motor cavities 6.1 are located within the mounting groove 6.6.1 on the circuit board mounting surface 6.6. More preferably, the intermediate cavity opening 6.4 communicates with the potting glue ports 6.3 corresponding to the two motor cavities 6.1.

[0199] Part of the inner wall of motor cavity 6.1 cooperates with potting compound 7.1 to form a positioning annular surface. This surface faces radially inward of the motor axis, with its centerline coinciding with the motor axis. The motor's fixed end (specifically, cover plate 3.1 within bearing base 3) extends into and seals against the inner side of the positioning annular surface.

[0200] The portion of the positioning annular surface formed by the inner wall of the motor cavity 6.1 is the circumferential positioning surface 6.1.2. Specifically, the circumferential positioning surface 6.1.2 is a curved surface formed by rotating a line segment more than 180° around the centerline of the positioning annular surface, and the line segment is parallel to the centerline of the positioning annular surface. Thus, when the motor is installed in the motor cavity 6.1 (before potting 7.1 is formed), the circumferential positioning surface 6.1.2 can restrict the movement of the fixed end of the motor in the radial plane.

[0201] Part of the inner wall of the motor cavity 6.1 forms an axial positioning surface 6.1.3, which is used to abut the end surface of the motor's fixed end, thereby axially positioning the motor within the motor cavity 6.1. Preferably, the outer edge of the axial positioning surface 6.1.3 in the same motor cavity 6.1 is connected to the positioning annular surface, that is, the axial positioning surface 6.1.3 is located inwardly of the circumferential positioning surface 6.1.2.

[0202] A connecting opening for communicating with the intermediate cavity 6.2 is provided on the axial positioning surface 6.1.3. The signal relay control unit 8.1 includes an angle sensor assembly 8.6.1, which cooperates with the magnetic ring 2.7 to obtain angular position information of the rotating shaft 2.1. In a projection plane perpendicular to the motor axis, the projection of the connecting opening completely covers the projection of the magnetic ring 2.7. In this way, the angle sensor assembly 8.6.1 in the signal relay control unit 8.1 can be positioned at the connecting opening within the intermediate cavity 6.2, as close as possible to the magnetic ring 2.7, thereby reducing the thickness of the cover plate 3.1 at the clearance groove 3.1.2.

[0203] A first anti-rotation element is located on the inner wall of one end of motor chamber 6.1, adjacent to the other motor chamber 6.1. This element cooperates with a second anti-rotation element located at the fixed end of the motor to prevent the motor from rotating circumferentially. One of the first and second anti-rotation elements is a slot 6.1.1, and the other is a block 1.5.2, which inserts and connects to slot 6.1.1. The first and second anti-rotation elements cooperate to prevent the motor from rotating circumferentially within motor chamber 6.1.

[0204] Specifically, in this embodiment, the first anti-rotation element is a slot 6.1.1, and the second anti-rotation element is a block 1.5.2. The inner wall of the motor cavity 6.1, where the slot 6.1.1 is located, faces away from the other motor cavity 6.1. In the stator module 1, the block 1.5.2 is located on the end face of the potting layer 1.5 near the non-drive end of the rotating shaft 2.1.

[0205] There is a gap between the outer wall of the motor stator and the inner wall of the motor cavity 6.1, which is filled with potting glue 7.1. This gap is preferably about 0.5-1 mm. The provision of this gap facilitates the flow of glue during the potting process in the motor cavity 6.1.

[0206] An installation opening 6.5 is provided at one end of the motor cavity 6.1, away from the intermediate cavity 6.2. Mounted within this opening is an oil outlet plate 5 for the hydraulic pump 11 of the active suspension electro-hydraulic pump. This plate extends into the motor cavity 6.1 through this opening, sealing off the latter. Furthermore, it extends into the inner wall 1.6.2 of the motor's stator and forms a sealed connection therewith.

[0207] When the integrated motor housing 6 is used, it can be (it should be noted that the usage process provided here is only an example and not a limitation of this embodiment): the two motors are respectively extended into the motor cavity 6.1 from the installation openings 6.5 of the two motor cavities 6.1, and the fixed end of the motor (specifically the cover plate 3.1) is pressed into the circumferential positioning surface 6.1.2 and the end face of the fixed end abuts the axial positioning surface 6.1.3. Then, a potting tool 7.2 (one potting tool 7.2 corresponds to each motor cavity 6.1) is extended from the potting glue port 6.3 and the middle cavity opening 6.4. The potting tool 7.2 fits the part of the outer wall of the fixed end of the motor that is not in contact with the circumferential positioning surface 6.1.2 (this refers to the part viewed from the circumferential direction, not that the potting tool 7.2 completely covers the part of the outer wall of the fixed end of the motor that is not in contact with the circumferential positioning surface 6.1.2). In this way, the fixed end of the motor cooperates with the potting tool 7.2 to seal the end of the motor cavity 6.1 close to the middle cavity 6.2 (except for the potting hole 7.2.1). The potting hole 7.2.1 can be set on the potting tool 7.2, or there can be a gap between the potting tool 7.2 and part of the inner wall of the potting glue port 6.3, and the gap forms the potting hole 7.2.1. The mounting opening 6.5 of the motor cavity 6.1 is then sealed using the second potting tool 7.3 (one potting tool 7.3 is provided for each motor cavity 6.1). Potting is then performed through the potting holes 7.2.1. After the glue has solidified, the first potting tool 7.2 and the second potting tool 7.3 are removed, and the oil outlet plate 5 is installed. During the potting process, the three-phase cables of the motor and the electrical connection cables of the temperature detection unit 1.7 are routed through the potting holes 7.2.1. After the glue solidifies, the three-phase cables and the electrical connection cables can pass through the potting glue 7.1, exit the motor cavity 6.1, and be electrically connected to the signal relay control unit 8.1 within the intermediate cavity 6.2.

[0208] The connection between the potting glue port 6.3 and the middle cavity opening 6.4, and the circumferential positioning surface 6.1.2 forming part of the positioning annular surface, both increase the space available for placing the potting tool 7.2, making the potting work of the motor cavity 6.1 more convenient and cost-effective.

[0209] After the potting work is completed and the potting tool 7.2 is removed, the potting glue 7.1 formed by the solidification of the glue will be replenished at the potting glue opening 6.3. That is, the potting glue 7.1 will cooperate with the fixed end of the motor and the inner wall of the motor cavity 6.1 itself, so that the motor cavity 6.1 is closed at the end close to the middle cavity 6.2, and will not be unsealed due to the potting glue opening 6.3 opened on the integrated motor housing 6.

[0210] The potting glue openings 6.3 corresponding to the two potting glues 7.1 are both opened on the circuit board mounting surface 6.6. Therefore, when the circuit board mounting surface 6.6 is placed upward, the two motor cavities 6.1 can be potted at the same time, and the potting efficiency is improved (the split housing in the prior art requires potting of two independent housings separately).

[0211] The oil outlet plate 5 is located inside the motor cavity 6.1 and a temperature and pressure detection unit is installed on the part outside the motor. The pump cavity temperature and pressure sensor cable 8.4 of the temperature and pressure detection unit extends out of the integrated motor housing 6 through the cable opening 6.7 on the integrated motor housing 6. In the axial direction of the motor, the cable opening 6.7 is located at a position farther away from the intermediate cavity 6.2 relative to the stator module 1 of the motor. When the integrated motor housing 6 is potted, the pump cavity temperature and pressure sensor cable 8.4 of the temperature and pressure detection unit is led out from the cable opening 6.7. When the glue solidifies into the potting glue 7.1, the potting glue 7.1 will close the cable opening 6.7. Preferably, the cable opening 6.7 can also be opened in the mounting groove 6.6.1.

[0212] like Figure 11 As shown, the temperature and pressure detection unit includes a pump cavity temperature and pressure sensor board 8.2, which is secured to the oil outlet plate 5 via two M3 screws 8.2.1. A pump cavity temperature and pressure sensor board connector 8.3 is provided on the pump cavity temperature and pressure sensor board 8.2. A pump cavity temperature and pressure sensor cable 8.4, which connects to the pump cavity temperature and pressure sensor board 8.2, has a terminal block on one end. The terminal block on the pump cavity temperature and pressure sensor cable 8.4 plugs into the pump cavity temperature and pressure sensor board connector 8.3 on the pump cavity temperature and pressure sensor board 8.2, achieving both mechanical and electrical connections.

[0213] The circuit board mounting surface 6.6 is provided with a sealing groove 6.6.2, which is arranged around the mounting groove 6.6.1. On the circuit board mounting surface 6.6, a threaded hole 6.6.3 for connecting the controller cover 9 can be provided on the outer side of the sealing groove 6.6.2.

[0214] After potting is complete, the electrical wiring, signal relay control unit 8.1, and control board 12 are positioned properly. Sealant is then applied to the sealing grooves 6.6.2. The controller cover 9 is then placed over the circuit board mounting surface 6.6, and screwed to the integrated motor housing 6. Once the controller cover 9 is connected to the integrated motor housing 6, the sealant is allowed to solidify, ensuring that the chamber housing the control board 12 is airtight.

[0215] A feasible assembly scheme for the active suspension electro-hydraulic pump of this embodiment is now provided. It should be noted that this installation scheme is only for illustration and is not intended to limit this embodiment.

[0216] Complete the assembly of the stator module 1 and the rotor module 2. The rotor module 2 is then assembled with the bearing module 4 and the bearing base 3. The rotor module 2 and the bearing base 3 are then assembled together with the stator module 1 to complete the assembly of the stator and rotor. The two stators and rotors are then press-fitted into the integrated motor housing 6. During the assembly of the rotor module 2 and the bearing base 3 together with the stator module 1, lubricating oil is applied to the first sealing ring 3.3 and the stator inner wall 1.6.2 when the bearing base 3 is press-fitted onto the stator inner wall 1.6.2. After the stator and rotor are assembled, a gap of approximately 0.1 mm is maintained between the outer ring of the bearing base 3 (specifically, the sidewall portion 3.2) and the stator inner wall 1.6.2. The extrusion deformation of the first sealing ring 3.3 aligns the rotor module 2 with the stator module 1 on the non-drive end of the shaft 2.1.

[0217] like Figure 10 As shown, potting tool 1 7.2 is installed at potting glue port 6.3, and potting tool 2 7.3 is installed at mounting opening 6.5. Potting tool 2 7.3 also has a through-hole for the shaft 2.1 to pass through. This through-hole houses an auxiliary sliding bearing 7.3.1, identical to the first sliding bearing 5.3 described above. The shaft 2.1 actually passes through this through-hole and is rotationally connected to the auxiliary sliding bearing 7.3.1. At this point, the coaxiality of the centerline of the circumferential positioning surface 6.1.2 (i.e., the centerline of the positioning annular surface) on the integrated motor housing 6 must be ensured with the axis of the auxiliary sliding bearing 7.3.1. This ensures that, after the potting process is completed and the potting glue 7.1 fills the gap between the outer wall of the stator and the inner wall of the motor cavity 6.1, the axis of the shaft 2.1 coincides with the preset axis. After installing the stators and rotors corresponding to the two motor cavities 6.1, as well as the potting tool 1 7.2 and potting tool 2 7.3, the two motor cavities 6.1 can be potted simultaneously using vacuum potting. The potting glue 7.1 is cured at high temperature. Then, the potting tool 1 7.2 and potting tool 2 7.3 are removed.

[0218] Press the first sliding bearing 5.3 into the hole through which the rotating shaft 2.1 passes on the oil outlet plate 5 using an interference fit. Insert the second sealing ring 5.1 into the second sealing ring groove 5.4 of the oil outlet plate 5, and insert the third sealing ring 5.2 into the third sealing ring groove 5.5 of the oil outlet plate 5. Install the pump chamber temperature and pressure sensor plate 8.2 onto the oil outlet plate 5. Plug the corresponding connectors of the pump chamber temperature and pressure sensor cable 8.4 into the connector ports on the pump chamber temperature and pressure sensor plate 8.2. Then, pass the end of the pump chamber temperature and pressure sensor cable 8.4, unattached from the connector, through the installation opening 6.5 into the motor chamber 6.1, then through the cable opening 6.7 and out of the integrated motor housing 6. Next, press the oil outlet plate 5 onto the stator inner wall 1.6.2 of the stator module 1, ensuring that the second sealing ring 5.1 engages with the stator inner wall 1.6.2, compressing the second sealing ring 5.1 to generate a spring force that forms a seal. At the same time, the oil outlet plate 5 is sealed to the inner wall of the motor cavity 6.1 at the installation opening 6.5 via a third sealing ring 5.2. Before press-fitting, both the rotating shaft 2.1 and the first sliding bearing 5.3 are lubricated. The injection-molded chamfer 1.6.3 on the stator inner wall 1.6.2, near the drive end of the rotating shaft 2.1, prevents the second sealing ring 5.1 from cutting during press-fitting. To ensure proper alignment of the oil outlet plate 5, the integrated motor housing 6, and the rotating shaft 2.1, ideally, there should be no gap between the oil outlet plate 5 and the integrated motor housing 6, and between the first sliding bearing 5.3 and the rotating shaft 2.1. However, to facilitate assembly and rotation, in this embodiment, a gap of approximately 0.05 mm is designed between the oil outlet plate 5 and the integrated motor housing 6, and a gap of approximately 0.1 mm is designed between the first sliding bearing 5.3 and the rotating shaft 2.1. The extrusion deformation of the second sealing ring 5.1 aligns the rotor module 2 with the stator module 1 on the drive end of the rotating shaft 2.1. Moreover, at the connection between the oil outlet plate 5 and the inner wall of the motor cavity 6.1 at the installation opening 6.5, the installation of the oil outlet plate 5 on one motor cavity 6.1 can be completed before the installation of the oil outlet plate 5 on the other motor cavity 6.1 is completed.

[0219] The above assembly separates the sealed wet chamber 10 from the intermediate chamber 6.2. The signal relay control unit 8.1 is installed in the intermediate chamber 6.2. The electrical connection wires of the temperature and pressure detection unit extend out of the integrated motor housing 6 through the cable opening 6.7. The electrical connection wires of the temperature detection unit 1.7 extend out of the integrated motor housing 6 through the potting glue opening 6.3. Both electrical connection wires extend into the intermediate chamber 6.2 through the intermediate chamber opening 6.4 and are electrically connected to the signal relay control unit 8.1.

[0220] The dual-motor assembly for the active suspension electro-hydraulic pump provided in this embodiment cleverly arranges a process structure opening for pouring glue from the middle of the shell into the motor cavity 6.1 (i.e., the connection point between the pouring glue opening 6.3 and the middle cavity opening 6.4), and correspondingly cleverly designs an independent electric motor with its own dry and wet cavity separation, thereby reconstructing and simplifying the assembly process of the dual-motor assembly for the active suspension electro-hydraulic pump, avoiding the design of bolt-fixed connection between the dual motors (two independent shells are provided for installing two motors respectively) and the process of sealant sealing (in this embodiment, the sealing groove 6.6.2 for applying sealant is provided in a circle around the installation groove 6.6.1 and is continuous), thereby improving the overall anti-road vibration function of the product and the sealing reliability of the product controller cavity (i.e., the cavity where the control board 12 is placed).

[0221] Example 3

[0222] This embodiment further explains the hydraulic pump 11 based on the above embodiment 1 or embodiment 2:

[0223] See Figures 7 and 8 and Figures 30 to 32 In one embodiment, an internal meshing linear conjugate gear pump for an active suspension electro-hydraulic pump includes a pump housing 11.1, an internal meshing gear set, and a filling piece.

[0224] A working space is defined within the pump housing 11.1. The pump housing 11.1 is provided with a first fluid port 11.13 and a second fluid port 11.15 communicating with the working space.

[0225] An internally meshing gear set is arranged within the workspace and includes a first gear 11.5 having external teeth and a second gear 11.4 having internal teeth. First gear 11.5 is rotatably arranged along a first axis and is configured to rotate when driven by shaft 2.1. Second gear 11.4 is rotatably arranged along a second axis different from the first axis. Second gear 11.4 is configured to mesh with first gear 11.5 in an engagement zone, forming a fluid space between first gear 11.5 and second gear 11.4, away from the engagement zone.

[0226] A filler is arranged in the fluid space and divides the fluid space into a first fluid chamber 11.14 and a second fluid chamber 11.16 located on either side of the fluid space in the circumferential direction (specifically, the fluid space enclosed by the mutually meshing first and second gears 11.5, 11.4 and the inner cavity of the pump housing 11.1 is initially divided into two parts by the meshing of the filler and the gears; these two parts are the first fluid chamber 11.14 and the second fluid chamber 11.16). The first fluid chamber 11.14 is connected to the first fluid port 11.13 via a first fluid channel, and the second fluid chamber 11.16 is connected to the second fluid port 11.15 via a second fluid channel.

[0227] When first gear 11.5 rotates forward, second gear 11.4 rotates in the same direction, gradually increasing the volume of first fluid chamber 11.14 and creating a partial vacuum. Oil, under the action of atmospheric pressure, enters first fluid chamber 11.14 from first fluid port 11.13, creating a low-pressure chamber for oil absorption. Simultaneously, the volume of second fluid chamber 11.16 gradually decreases, squeezing the oil and increasing its pressure. The oil is then forced out of second fluid port 11.15, creating a high-pressure chamber for oil discharge. Conversely, when first gear 11.5 rotates counterclockwise, second gear 11.4 rotates in the same direction, gradually increasing the volume of second fluid chamber 11.16 and creating a partial vacuum. Oil, under the action of atmospheric pressure, enters second fluid chamber 11.15 from second fluid port 11.16, creating a low-pressure chamber for oil absorption. Simultaneously, the volume of first fluid chamber 11.14 gradually decreases, squeezing the oil and increasing its pressure. The oil is then forced out of first fluid port 11.13, creating a high-pressure chamber for oil discharge.

[0228] Among them, the first gear 11.5 and the second gear 11.4 have linear conjugate tooth shapes, and the number of teeth of the first gear 11.5 and the number of teeth of the second gear 11.4 are mutually prime tooth ratios. A typical value is that the first gear 11.5 uses 10 teeth and the second gear 11.4 uses 13 teeth, but it is not limited to this tooth number pairing.

[0229] In this embodiment, a first gear 11.5 with external teeth and a second gear 11.4 with internal teeth are disposed within the pump housing 11.1. The first gear 11.5 and the second gear 11.4 mesh with each other in an engagement area, forming a fluid space away from the engagement area. A filler is further provided to divide the fluid space into a first fluid chamber 11.14 and a second fluid chamber 11.16 on either side of the circumference. These chambers communicate with the first fluid port 11.13 and the second fluid port 11.15 on the pump housing 11.1, respectively. Among them, this embodiment sets the first gear 11.5 and the second gear 11.4 to a linear conjugate tooth profile. Compared with the mainstream involute tooth profile, the linear conjugate tooth profile does not have oil trapping in the meshing area, which greatly reduces the problem of oil trapping, improves the meshing smoothness and gear reliability life, and reduces the noise caused by gear meshing. The number of teeth of the first gear 11.5 and the number of teeth of the second gear 11.4 are set to a mutually prime tooth ratio, that is, there is no common divisor between the number of teeth of the first gear 11.5 and the number of teeth of the second gear 11.4, which can reduce the probability of resonance, thereby solving the problem of low efficiency, abnormal wear, vibration and noise caused by oil trapping in the existing internal meshing linear conjugate gear pump.

[0230] The specific structure of this embodiment is further described below:

[0231] In this embodiment, the gear parameters of the first gear 11.5 and the second gear 11.4 include:

[0232] The tooth profile half angle β is 25.5° to 26.5°, the pitch thickness coefficient ks is 4 / 15 to 2 / 5, the addendum coefficient hax is 0.58 to 0.59, the root height coefficient hfx is 0.78 to 0.79, and the contact ratio ε is 1.05 to 1.15. The preferred values ​​are the tooth profile half angle β = 26°, the pitch thickness coefficient ks = 1 / 3, the addendum coefficient hax = 0.585, the root height coefficient hfx = 0.785, and the contact ratio ε is in the range of 1.05 to 1.15.

[0233] In this embodiment, the pump housing 11.1 specifically includes an oil inlet plate 11.1.1 and an oil outlet plate 5. The oil inlet plate 11.1.1 covers the oil outlet plate 5 and together form the aforementioned working space. The oil outlet plate 5 is mounted on the external motor (specifically, the side of the oil outlet plate 5 facing away from the oil inlet plate 11.1.1 is sealed to the motor housing or the stator inner wall 1.6.2). The oil inlet plate 11.1.1 is provided with the aforementioned first fluid port 11.13 and second fluid port 11.15.

[0234] Furthermore, the inner cavity of the oil outlet plate 5 may be provided with a gear cavity sleeve 11.11 for sliding engagement with the outer ring surface of the second gear 11.4. Gear cavity sleeve 11.11, in conjunction with the axially inner side surfaces of the oil inlet plate 11.1.1 and the oil outlet plate 5, forms a gear cavity for mounting the internally meshing gear set. The inner surface of gear cavity sleeve 11.11 is coated with a friction-reducing coating 11.12, which reduces friction between the second gear 11.4 and the inner surface of gear cavity sleeve 11.11 during pump operation, thereby lowering power consumption, improving efficiency, and reducing noise and vibration.

[0235] In this embodiment, to prevent axial leakage and adjust axial clearance, the internal linear conjugate gear pump further includes two axial compensation units, one positioned axially at either end of the internal gear set. Specifically, the two axial compensation units are positioned between the internal gear set and oil inlet plate 11.1.1 and between the internal gear set and oil outlet plate 5, respectively. Each axial compensation unit is configured to axially abut against the internal gear set under the action of a compensation force. The axial compensation unit located near the first fluid port 11.13 and the second fluid port 11.15 forms a first fluid channel and a second fluid channel. These two fluid channels are defined on the axial compensation unit between the internal gear set and oil inlet plate 11.1.1. The axial compensation unit is abutted against the first gear 11.5 and / or the second gear 11.4.

[0236] Furthermore, a third fluid chamber 11.37 is formed within the fluid space, located between the first fluid chamber 11.14 and the second fluid chamber 11.16. Specifically, it can be formed in the area where the filler is located. The fluid pressure within the third fluid chamber 11.37 is located between the first and second fluid chambers 11.14, 11.16, i.e., a medium-pressure chamber. The axial compensation unit is provided with an oil passage 11.21 connected to the third fluid chamber 11.37. Oil passage 11.21 is configured to direct the oil within the third fluid chamber 11.37 into the side of the axial compensation unit facing away from the internal gear set, thereby balancing the deflection force exerted on the axial compensation unit by the fluid pressure difference between the first and second fluid chambers 11.14, 11.16. The first fluid chamber 11.14 and the second fluid chamber 11.16 are respectively a high-pressure chamber and a low-pressure chamber. The two have different pressures and are located in different areas, which will result in different forces acting on the axial compensation unit in the axial direction, making the axial compensation unit prone to deflection. Through the cooperation of the third fluid chamber 11.37 and the oil channel 11.21, the other side of the axial compensation unit can be supported by a medium-pressure fluid, thereby reducing the deflection force, avoiding abnormal wear caused by the deflection of the axial compensation unit, and improving the service life of the oil pump and its efficiency during its service life.

[0237] Specifically, the axial compensation unit comprises an axial floating plate 11.3 and an axial elastic member, the ends of which are respectively attached to the pump housing 11.1 and the axial floating plate 11.3. The axial elastic member, located near the first and second fluid ports 11.13 and 11.15, cooperates with the axial floating plate 11.3 to form a first and second fluid channel, each disconnected from the other, and a pressure balancing chamber located on the side of the axial floating plate 11.3 facing away from the internal gear set.

[0238] The aforementioned oil channel 11.21 is defined on the axial floating plate 11.3, and the pressure balance chamber is connected to the oil channel 11.21. Furthermore, a lubrication channel may be defined on the surface of the axial floating plate 11.3 facing away from the internal gear set. This lubrication channel connects to the oil channel 11.21 or the pressure balance chamber, and then to the outer edge of the axial floating plate 11.3. This lubrication channel allows oil to flow through the lubrication channel between the outer side of the second gear 11.4 and the gear chamber bushing 11.11 for lubrication.

[0239] The axial elastic member can be specifically a rubber pad 11.2. When the end face of the axial floating plate 11.3 rubs and wears against the first gear 11.5 and / or the second gear 11.4, the elastic force of the rubber pad 11.2 can be used to squeeze the axial floating plate 11.3 to automatically compensate for the gap. Furthermore, the axial floating plate 11.3 is provided with a first fluid hole and a second fluid hole. The axial elastic member can be specifically two rubber rings, which are respectively attached to the side of the axial floating plate 11.3 facing away from the gears and are respectively mounted on the first fluid hole and the second fluid hole. The first fluid hole cooperates with the inner surface of the rubber ring to form the aforementioned first fluid channel, and the second fluid hole cooperates with the inner surface of the rubber ring to form the aforementioned second fluid channel. The outer surfaces of the two rubber rings cooperate with the surface of the axial floating plate 11.3 facing away from the gears to form the aforementioned pressure balance chamber.

[0240] Furthermore, the mating surface of the axial floating plate 11.3 facing the internally meshing gear set is provided with extended blind grooves extending from the first fluid chamber 11.14 and the second fluid chamber 11.16 along the filler, respectively. Each extended blind groove is provided with a connected unloading groove group, allowing fluid in the two fluid chambers to enter the extended blind groove and achieve unloading through the unloading grooves within the unloading groove group. The unloading grooves within each unloading groove group cover the area where the teeth of the first gear 11.5 and the second gear 11.4 are located. The function of the unloading grooves is to release some of the fluid pressure carried between the teeth of the first gear 11.5 or the second gear 11.4 and the filler through their gradually decreasing cross-sectional area, thereby preventing this portion of fluid from being compressed and causing impact on the two gears.

[0241] Among them, each unloading groove group can include three or more unloading grooves. When the number of unloading grooves is three, the first unloading groove 11.18 corresponding to the first gear 11.5 (which can be set to extend from the extended blind groove toward the area where the teeth of the first gear 11.5 are located), and the second unloading groove 11.19 and the third unloading groove 11.20 corresponding to the second gear 11.4 (which can be set to extend from the extended blind groove toward the area where the teeth of the second gear 11.4 are located) can be specifically triangular in cross section, thereby taking into account the reasonable unloading requirements when the first gear 11.5 and the second gear 11.4 are meshed, reducing the situation where oil is trapped in the gear pump during operation, reducing vibration and noise, and improving the life of the pump.

[0242] In this embodiment, in order to adjust the radial gap and perform gap compensation to improve efficiency, the filling piece includes a crescent plate 11.6, two radial compensation pieces and two floating plates 11.7.

[0243] Crescent plate 11.6 is rotatably mounted to pump housing 11.1 via a retaining pin (the aforementioned third fluid chamber 11.37 is formed in the area where the retaining pin is located). Floating grooves are provided on either the outer or inner surface of crescent plate 11.6, circumferentially, with two floating grooves located on either side of the retaining pin. Floating plates 11.7 are positioned within these floating grooves. Radial compensators are positioned between corresponding floating plates 11.7 and the floating grooves, configured to radially push floating plates 11.7 away from crescent plate 11.6. This embodiment utilizes radial compensators with optimized interplay and clearance to achieve high volumetric efficiency.

[0244] Among them, the radial compensation part includes an adjusting pin 11.8 and an adjusting spring 11.9. An adjusting slot with an opening facing the floating plate 11.7 is provided in the floating slot. The adjusting pin 11.8 and the adjusting spring 11.9 are arranged in the adjusting slot, and the adjusting spring 11.9 is configured to push the adjusting pin 11.8 to fit tightly against the floating plate 11.7.

[0245] The fixing pins can be specifically two guide pin shafts 11.10, which are respectively inserted into the crescent plate 11.6 from both sides of the axial direction and are respectively connected to the oil inlet plate 11.1.1 and the oil outlet plate 5.

[0246] This embodiment employs a floating slot opening toward the first gear 11.5. The outer surface of the crescent plate 11.6 engages the tooth top of the second gear 11.4, the adjustment pin 11.8 engages the outer surface of the floating plate 11.7, and an adjustment spring 11.9 is mounted between the crescent plate 11.6 and the adjustment pin 11.8. The inner surface of the floating plate 11.7 engages the tooth top of the first gear 11.5. The adjustment spring 11.9 compresses the adjustment pin 11.8, pushing the floating plate 11.7 toward the tooth top of the first gear 11.5 to achieve clearance compensation. After compensation, the clearance between the tooth top of the second gear 11.4 and the outer surface of the crescent plate 11.6 is within a range of 0-0.003, and the clearance between the tooth top of the first gear 11.5 and the inner surface of the floating plate 11.7 is also within a range of 0-0.003.

[0247] In this embodiment, a drive hole 11.17 for connecting to the rotating shaft 2.1 is provided on the first gear 11.5. In order to improve the balance of the moving parts and enhance the driving stability, and reduce noise and vibration, the drive hole 11.17 can be configured as a symmetrical regular hexagonal drive hole 11.17 or a spline hole.

[0248] To resolve or improve problems such as oil trapping, low efficiency, abnormal wear, vibration, and noise, and to enhance the efficiency and life of the oil pump, this embodiment proposes solutions in the driving structure of the driving gear (first gear 11.5), gear cavity coating, gear parameters and number of teeth, clearance between moving parts and clearance adjustment device, unloading groove structure, and cooling or lubricating oil channel 11.21 on the axial floating plate 11.3.

[0249] In this embodiment, the motor's rotating shaft 2.1 extends into the workspace and is in transmission connection with the drive hole 11.17 of the first gear 11.5. Specifically, to achieve motor cooling, the motor's rotating shaft 2.1 can be configured as a hollow shaft and extend to the area where the pressure balance chamber is located, thereby allowing the hollow channel of the hollow shaft to connect the pressure balance chamber and the rotor chamber where the motor rotor is located. Furthermore, the axial compensation unit located between the oil outlet plate 5 and the internal gear set can be configured to be symmetrical with the axial compensation unit on the other side. That is, the axial compensation unit located between the oil outlet plate 5 and the internal gear set can also include two rubber rings and an axial floating plate 11.3 to form a third fluid channel and a fourth fluid channel. Two cooling channels are provided on the oil outlet plate 5, each connecting the third and fourth fluid channels to the rotor chamber. One-way valves can be further provided in the two cooling channels to ensure that oil can only enter the pump housing 11.1 from the rotor chamber. That is, the oil in the rotor cavity is in a medium-pressure state, while the third fluid channel and the fourth fluid channel connected to it through the cooling channel are in a low-pressure state and a high-pressure state respectively (depending on the direction of rotation of the first gear 11.5). The pressure difference between the medium pressure and the low pressure can cause the oil in the rotor cavity to flow back to the gear pump through the corresponding one-way valve, completing the oil cooling cycle.

[0250] See Figure 53 In this embodiment, the pressure relief check structure may specifically include an oil unloading channel 5.6, an oil unloading seal 5.9, and an oil unloading elastic member 5.8 opened in the pump housing 11.1. One end of the oil unloading channel 5.6 is connected to the sealed wet chamber 10, and the other end of the oil unloading channel 5.6 is connected to the first fluid chamber 11.14 or the second fluid chamber 11.16. A section of the inner wall of the oil unloading channel 5.6 extends inward to form an annular check surface 5.6.1, and the annular check surface 5.6.1 is arranged to face the fluid space. The oil unloading seal 5.9 is movably connected in the oil unloading channel 5.6. The oil unloading elastic member 5.8 is connected to the oil unloading seal 5.9, and the oil unloading seal 5.9 is configured to abut against the annular check surface 5.6.1 under the elastic force of the oil unloading elastic member 5.8 to close the oil unloading channel 5.6.

[0251] Furthermore, the pressure relief check structure may further include a check valve seat 5.7, which is mounted to the oil discharge passage 5.6 by means of a chiseled fit. A notch 5.10 may be provided in the check valve seat 5.7 to maintain communication between the oil discharge passage 5.6 and the corresponding first fluid chamber 11.14 or second fluid chamber 11.16. The oil discharge elastic member 5.8 may be a spring, while the oil discharge seal 5.9 may be a steel ball or a sphere made of another material.

[0252] See Figure 38 and Figure 39, the shaft current derivation part of this embodiment is further explained below:

[0253] In this embodiment, the rotating shaft 2.1 passes through the oil outlet plate 5 at one end facing the hydraulic pump 11 and extends into the pump head accommodating space to be connected to the pump head assembly, and the portion of the rotating shaft 2.1 extending from the pump head assembly is rotatably connected to the oil outlet plate 5 and the oil inlet plate 11.1.1 through the first sliding bearing 5.3 and the second sliding bearing 11.24 respectively (specifically, a sliding bearing accommodating space corresponding to the second sliding bearing 11.24 can be opened on the oil inlet plate 11.1.1, and the first sliding bearing 5.3 is installed at the through hole passing through the oil outlet plate 5), and an axial gap is formed between the rotating shaft 2.1 and the oil inlet plate 11.1.1 (that is, the gap between the axial end face of the rotating shaft 2.1 and the bottom surface of the sliding bearing accommodating space. Preferably, an axially extending axial groove can be further opened on the bottom surface of the sliding bearing accommodating space to expand the axial gap so that the axial current derivation structure can be installed therein).

[0254] The axial current extraction structure may specifically include an elastic conductive structure and a grounding structure. The elastic conductive structure is installed in the aforementioned axial gap and is configured to be clamped in a predetermined compressed state between the oil inlet plate 11.1.1 and the axial end surface of the rotating shaft 2.1. The grounding structure is installed on the oil inlet plate 11.1.1 and is configured to connect to an external ground terminal.

[0255] Among them, the axial expansion and contraction of the elastic conductive structure in the preset compression state is greater than the axial movement of the rotating shaft 2.1. Specifically, the elongation and axial expansion of the elastic conductive structure in the preset compression state are respectively greater than the axial movement of the rotating shaft 2.1 toward its two ends, thereby ensuring that the elastic conductive structure is always in contact with the rotating shaft 2.1 and the oil inlet plate 11.1.1.

[0256] This embodiment provides an elastic conductive structure between the rotating shaft 2.1 of the active suspension electro-hydraulic pump assembly and the oil outlet plate 5. This elastic conductive structure is configured to be clamped in a preset compressed state between the oil inlet plate 11.1.1 and the axial end face of the rotating shaft 2.1. The axial expansion and contraction of the elastic conductive structure in the preset compressed state is configured to be greater than the axial movement of the rotating shaft 2.1. That is, during motor operation, the elastic conductive structure adaptively compensates for the axial movement of the rotating shaft 2.1, ensuring that the rotating shaft 2.1, the elastic conductive structure, and the oil outlet plate 5 always remain conductive. Furthermore, a grounding structure is provided on the oil outlet plate 5, connected to an external ground terminal, thereby ensuring that the shaft voltage generated on the rotating shaft 2.1 is at the same potential as the ground terminal through the branch circuit, thereby preventing shaft current from corroding the bearings. This embodiment utilizes the axial gap between the rotating shaft 2.1 and the oil outlet plate 5 to achieve dynamic contact in the axial direction. The elastic design maintains stable contact and a stable shaft current elimination effect, thus resolving the high risk of elimination failure in existing shaft current elimination solutions.

[0257] The specific structure of the shaft current derivation structure in this embodiment is further described below.

[0258] In this embodiment, the elastic conductive structure includes an outlet elastic member 11.22 and an outlet protrusion 11.23. The two ends of the outlet elastic member 11.22 are respectively connected to the oil inlet plate 11.1.1 and the outlet protrusion 11.23. The outlet protrusion 11.23 is configured so that its protruding end makes point contact with the rotating shaft 2.1. Specifically, the outlet protrusion 11.23 may include a base section and a protruding section (the protruding section may be configured as a cone) connected in the axial direction. The small end of the protruding section (i.e., the aforementioned protruding end) faces outward, and the large end is connected to the base section. The side of the base section facing away from the protruding section may be provided with a mounting groove for embedding and installing the outlet elastic member 11.22. Similarly, the oil inlet plate 11.1.1 may also be provided with a mounting groove for embedding and installing the outlet elastic member 11.22. The provision of the mounting grooves on both sides can ensure the stable installation of the outlet elastic member 11.22 and ensure the stability of the outlet elastic member 11.22 during the expansion and contraction process.

[0259] Specifically, the outlet spring 11.22 can be a bidirectional, top-to-bottom wave spring, which increases the contact area between the outlet spring 11.22, the outlet bump 11.23, and the oil inlet plate 11.1.1, thereby reducing contact resistance. The outlet bump 11.23 can be made of H62 copper with a silver-plated surface, and the shaft 2.1 can be subjected to a conductive oxidation treatment, also reducing contact resistance.

[0260] Preferably, the point contact position between the small end of the raised section and the rotating shaft 2.1 is located on the axis of the rotating shaft 2.1, that is, the lead-out protrusion 11.23 is arranged axially along the axis of the rotating shaft 2.1. When the rotating shaft 2.1 rotates, the relative linear speed of the lead-out protrusion 11.23 is low, which reduces the wear of parts during the rotation of the rotating shaft 2.1 and eliminates the need for installation and maintenance.

[0261] In this embodiment, since heat easily accumulates in the motor, the working medium in the hydraulic pump 11 will be guided into the motor to remove the heat. The process of the working medium entering and withdrawing from the motor requires that the rotating shaft 2.1 be set as a hollow shaft with an axial hollow channel.

[0262] On this basis, the elastic conductive structure may also include an electrically conductive block 11.25, which is fixedly mounted in the axial hollow channel of the rotating shaft 2.1, and the electrically conductive block 11.25 is configured to contact the raised end point of the lead-out protrusion 11.23. That is, the electrically conductive block 11.25 replaces the axial end face of the rotating shaft 2.1 in point contact with the lead-out protrusion 11.23. Specifically, the electrically conductive block 11.25 can be interference-pressed into the axial hollow channel to ensure the stability of the installation and contact with the lead-out protrusion 11.23. Specifically, an embedding groove corresponding to the electrically conductive block 11.25 can be further processed at the corresponding end of the axial hollow channel of the hollow shaft.

[0263] See Figure 51 and Figure 52 In this embodiment, the grounding structure can be specifically a grounding bolt 11.26 installed on the oil inlet plate 11.1.1, and the grounding bolt 11.26 is connected to the ground terminal of the vehicle.

[0264] The active suspension electro-hydraulic pump assembly of this embodiment forms a branch circuit by forming the rotating shaft 2.1, the electrical conduction block 11.25, the lead-out protrusion 11.23, and the oil inlet plate 11.1.1. The oil inlet plate 11.1.1 is connected to the vehicle ground terminal via the grounding bolt 11.26, thereby ensuring that the shaft voltage generated on the rotating shaft 2.1 is at the same potential as the ground terminal through the above-mentioned branch circuit, thereby preventing the shaft current from corroding the bearings.

[0265] The grounding structure of this embodiment is described in detail below:

[0266] In this embodiment, the grounding structure may specifically include a grounding bolt 11.26, a metal bracket 11.28, a grounding gasket 11.32 and a flexible grounding wire.

[0267] Grounding bolt 11.26 includes a first threaded section, a shock-absorbing mounting section, and a second threaded section arranged in sequence in the axial direction. The first threaded section is threadedly connected to the oil inlet plate 11.1.1 and the oil outlet plate 5, and the first threaded section is in conductive contact with the oil inlet plate 11.1.1 and the oil outlet plate 5. A metal bracket 11.28 is mounted on the external grounding terminal, and the metal bracket 11.28 is configured to be elastically connected to the shock-absorbing mounting section via a shock-absorbing ring 11.27. A grounding gasket 11.32 is sleeved on the second threaded section and is locked to the shock-absorbing ring 11.27 via a grounding nut 11.34. The two ends of the flexible grounding wire are electrically connected to the metal bracket 11.28 and the grounding gasket 11.32, respectively.

[0268] This embodiment realizes the conductive connection between the integrated motor housing 6, the oil inlet plate 11.1.1, the oil outlet plate 5 and the metal bracket 11.28 through the specific setting of the grounding structure, which is beneficial to the rapid discharge of static electricity generated by the electric motor and the hydraulic pump 11. At the same time, the setting of the shock absorber ring 11.27 and the setting of the grounding bolt 11.26 do not interfere with each other, thereby enabling the active suspension electro-hydraulic pump assembly to simultaneously meet the functions of electrostatic conduction, vibration isolation and stable connection.

[0269] Specifically, the grounding bolt 11.26 includes a first threaded portion 11.26.1, a gap section 11.26.2, a nut portion 11.26.3, a shock-absorbing mounting column 11.26.4 and a second threaded portion 11.26.5, which are arranged in sequence along the axis. The diameter of the first threaded portion 11.26.1 is smaller than the diameter of the gap section 11.26.2, the diameter of the gap section 11.26.2 is smaller than the diameter of the nut portion 11.26.3, the nut portion 11.26.3 is used to facilitate the installation of the grounding bolt 11.26, the gap section 11.26.2 is used to prevent the nut portion 11.26.3 from causing structural interference to the oil inlet plate 11.1.1, the diameter of the second threaded portion 11.26.5 is smaller than the diameter of the shock-absorbing mounting column 11.26.4, and the diameter of the shock-absorbing mounting column 11.26.4 is smaller than the diameter of the nut portion 11.26.3.

[0270] Furthermore, a first through hole 11.27.3 is provided in the center of the shock absorbing ring 11.27, and the shock absorbing ring 11.27 is sleeved on the outer periphery of the shock absorbing mounting column 11.26.4, and the shock absorbing ring 11.27 and the shock absorbing mounting column 11.26.4 are fixedly connected by interference fit.

[0271] In this embodiment, after the damping ring 11.27 and the grounding bolt 11.26 are assembled, one side of the damping ring 11.27 abuts against the nut portion 11.26.3, and the nut portion 11.26.3 is used to limit the movement of the damping ring 11.27 along the axis of the grounding bolt 11.26.

[0272] Furthermore, shock-absorbing ring 11.27 comprises a shock-absorbing column 11.27.1 and an annular flange 11.27.2 disposed on the outer wall of shock-absorbing column 11.27.1. The diameter of shock-absorbing column 11.27.1 is smaller than that of flange 11.27.2. Metal bracket 11.28 comprises a second through-hole 11.29, the diameter of which is smaller than that of flange 11.27.2. Metal bracket 11.28 is sleeved around the outer periphery of shock-absorbing column 11.27.1, and the two are fixedly connected by an interference fit.

[0273] In this embodiment, after the metal bracket 11.28 and the shock-absorbing ring 11.27 are assembled, the metal bracket 11.28 abuts against the flange 11.27.2, and the flange 11.27.2 is used to limit the movement of the metal bracket 11.28 along the axis of the grounding bolt 11.26.

[0274] Preferably, a grounding nut 11.34 is also provided, and a grounding gasket 11.32 is provided between the grounding nut 11.34 and the metal bracket 11.28. The grounding gasket 11.32 is provided with a third through hole. After the second threaded portion 11.26.5 passes through the grounding gasket 11.32, the end of the second threaded portion 11.26.5 is threadedly connected to the grounding nut 11.34.

[0275] Furthermore, the outer diameter of the grounding nut 11.34 and the outer diameter of the grounding gasket 11.32 are both smaller than the diameter of the second through hole 11.29 of the metal bracket 11.28. When the grounding bolt 11.26, the grounding gasket 11.32, the grounding nut 11.34 and the metal bracket 11.28 are assembled, the first end face of the grounding gasket 11.32 abuts against the grounding nut 11.34, and the second end face of the grounding gasket 11.32 abuts against the shock-absorbing ring 11.27. When the grounding nut 11.34 is tightened, the two sides of the shock-absorbing ring 11.27 are respectively limited by the nut portion 11.26.3 and the grounding nut 11.34, which can further prevent the shock-absorbing ring 11.27 from moving left and right along the axis direction of the grounding bolt 11.26.

[0276] Furthermore, when the second threaded portion 11.26.5 is threadedly connected to the grounding nut 11.34, the second threaded portion 11.26.5 and the grounding nut 11.34 are in conductive contact. When the grounding nut 11.34 is tightened, the grounding nut 11.34 and the grounding gasket 11.32 are in conductive contact. The grounding gasket 11.32 is provided with a first grounding terminal 11.33 extending outwardly through a wire or an integrated stamping process. That is, the grounding gasket 11.32 body does not come into direct contact with the metal bracket 11.28, and a conductive connection is formed between the first grounding terminal 11.33 and the metal bracket 11.28. Specifically, the metal bracket 11.28 is provided with a grounding hole 11.30, and the first grounding terminal 11.33 and the grounding hole 11.30 are fixedly connected and in conductive contact via a grounding screw 11.31. The grounding gasket 11.32 includes a C-shaped spring or a flat washer.

[0277] Preferably, the strength grade of the grounding bolt 11.26 is selected to be equal to or higher than grade 10.9 to ensure the connection strength of the grounding bolt 11.26.

[0278] Example 4

[0279] See Figures 33 to 37In this embodiment, based on the above-mentioned embodiment 3, the tooth profiles of the first gear 11.5 and the second gear 11.4 are modified to involute tooth profiles, specifically the tooth profiles and the corresponding unloading grooves are adjusted. The other structures are basically the same as the hydraulic pump scheme in the above-mentioned embodiment 3. The number of teeth of the first gear 11.5 and the number of teeth of the second gear 11.4 are still coprime, and there is no common divisor between the number of teeth of the first gear 11.5 and the number of teeth of the second gear 11.4, which can reduce the probability of resonance and avoid the generation of harmonic resonance noise.

[0280] The gear parameters of the first gear 11.5 and the second gear 11.4 may specifically include:

[0281] The pressure angle range is 24° to 25°, the tooth addendum coefficient is 0.85 to 0.95, and the top clearance coefficient is 0.18 to 0.22. The preferred values ​​are a pressure angle α of 25°, a tooth addendum coefficient ha* of 0.9, and a top clearance coefficient c* of 0.2. While ensuring normal gear transmission, an overlap ratio of 1.4 to 1.55 is used to reduce oil trapping in the oil pump.

[0282] After adopting the involute tooth profile, the layout of the unloading groove can be adaptively adjusted, specifically:

[0283] At least two unloading groove groups are provided on the mating surface of the axial floating plate 11.3 facing the internal meshing gear set. The two unloading groove groups are respectively arranged corresponding to the first fluid chamber 11.14 and the second fluid chamber 11.16, and the unloading grooves in each unloading groove group cover the area where the teeth of the first gear 11.5 and the second gear 11.4 are located. The function of the unloading groove is to release part of the fluid pressure carried by the first gear 11.5 or the second gear 11.4 between the teeth and the filler through its gradually decreasing cross-sectional area, thereby avoiding the situation where this part of the fluid is compressed and causes impact on the two gears.

[0284] Among them, each unloading groove group can include two or more parallel distributed unloading grooves (when the number of unloading grooves is two, the fourth unloading groove 11.35 is close to the first gear 11.5, and the fifth unloading groove 11.36 is close to the second gear 11.4, and the groove length of the fourth unloading groove 11.35 is shorter than that of the fifth unloading groove 11.36). The cross-section of the unloading groove can be specifically triangular, so as to take into account the reasonable unloading requirements when the first gear 11.5 and the second gear 11.4 are engaged, reduce the situation where oil is trapped in the gear pump when the gear pump is running, reduce vibration and noise, and improve the life of the pump.

[0285] Example 5

[0286] See Figure 40 and Figure 41Based on the above-mentioned embodiment three, this embodiment provides another shaft current derivation structure. In order to set up this shaft current derivation structure, a preset installation groove extending axially outward along the rotating shaft 2.1 needs to be opened on the oil inlet plate 11.1.1 (that is, a recess is set in the direction away from the rotating shaft 2.1), thereby forming a preset installation space between the preset installation groove and the axial end face of the rotating shaft 2.1.

[0287] The axial current extraction structure may specifically include a carbon brush assembly 11.38 arranged in a preset installation space, an electrical connector, and a grounding structure arranged on the oil inlet plate 11.1.1. The carbon brush assembly 11.38 is configured to axially push its carbon brush 11.38.5 to abut against the axial end face of the rotating shaft 2.1 in a preset compression state (i.e., by outputting an elastic force toward the rotating shaft 2.1 to the carbon brush 11.38.5, so that it abuts and presses against the axial end face of the rotating shaft 2.1). The electrical connector is configured to connect the carbon brush 11.38.5 and the oil inlet plate 11.1.1 at both ends, wherein at least part of the electrical connector can be deformed to match the axial movement of the carbon brush 11.38.5. The grounding structure is installed on the oil inlet plate 11.1.1, and the grounding structure is configured to connect to the external grounding terminal.

[0288] The permissible axial movement of the carbon brush 11.38.5 in the preset compressed state is greater than the axial play of the shaft 2.1. Specifically, the permissible movement of the carbon brush 11.38.5 toward and away from the shaft 2.1 in the preset compressed state is greater than the axial play of the shaft 2.1 toward its ends, thereby ensuring that the carbon brush 11.38.5 is in constant contact with the shaft 2.1.

[0289] This embodiment provides a predetermined mounting groove on the oil outlet plate 5 of the active suspension electro-hydraulic pump assembly, forming a predetermined mounting space between the groove and the axial end face of the rotating shaft 2.1. A carbon brush assembly 11.38 and an electrical connector are arranged within the predetermined mounting space. The carbon brush assembly 11.38 is configured to axially push the carbon brush 11.38.5 within it against the axial end face of the rotating shaft 2.1 in a predetermined compressed state. A partially deformable electrical connector is provided to achieve electrical conduction between the carbon brush 11.38.5 and the oil outlet plate 5. The allowable axial movement of the carbon brush 11.38.5 in the predetermined compressed state is set to be greater than the axial movement of the rotating shaft 2.1. That is, during motor operation, the carbon brush assembly 11.38 can adaptively compensate for axial movement of the rotating shaft 2.1. Furthermore, the partial deformation of the electrical connector matches the axial movement of the carbon brush 11.38.5, thereby ensuring that the rotating shaft 2.1, the carbon brush 11.38.5, the electrical connector, and the oil outlet plate 5 always maintain electrical conduction. A grounding structure is further provided on the oil outlet plate 5 and connected to the external grounding terminal, thereby ensuring that the shaft voltage generated on the rotating shaft 2.1 is the same as the grounding terminal potential through the above branch circuit, thereby preventing the shaft current from corroding the bearing.

[0290] The specific structure of the shaft current derivation structure in this embodiment is further described below.

[0291] In this embodiment, the carbon brush assembly 11.38 may specifically include a brush chamber 11.38.2, a carbon brush elastic member 11.38.4 and a carbon brush 11.38.5. The brush chamber 11.38.2 is installed in a preset mounting groove for fixation, and an axial channel opening toward the rotating shaft 2.1 is provided in the brush chamber 11.38.2. The carbon brush 11.38.5 is slidably connected to the axial channel 2.2.7 (that is, the axial channel 2.2.7 is used to limit the carbon brush 11.38.5 to move only in the axial direction).

[0292] The ends of the carbon brush spring 11.38.4 are connected to the brush chamber 11.38.2 and the carbon brush 11.38.5, respectively. The carbon brush spring 11.38.4 is configured to push the carbon brush 11.38.5 against the axial end surface of the rotating shaft 2.1 under a preset compression state. Specifically, the carbon brush spring 11.38.4 can be a spring or other compressible element that outputs an elastic force.

[0293] The electrical connector may specifically include a second grounding terminal 11.38.1 and a brush braid 11.38.3. The second grounding terminal 11.38.1 is fixed to the brush cavity 11.38.2, and the connecting section of the second grounding terminal 11.38.1 extends into the axial channel 2.2.7, and the grounding section of the second grounding terminal 11.38.1 extends out of the brush cavity 11.38.2. The grounding section is configured to press against the oil inlet plate 11.1.1 through its own deformation under the action of the brush cavity 11.38.2. The grounding section may specifically be a metal sheet bent axially outward. After the brush cavity 11.38.2 is installed in place, the distance between the bottom surface of the brush cavity 11.38.2 and the bottom surface of the preset installation groove is less than the axial length of the metal sheet, thereby causing the metal sheet to deform and maintain an electrically conductive state of abutment and compression. The two ends of the brush braid 11.38.3 are respectively connected to the connecting section and the carbon brush 11.38.5. Among them, the brush braid 11.38.3 and the connecting section can be connected by soldering, and the brush braid 11.38.3 and the carbon brush 11.38.5 can be connected by a sintering process.

[0294] Specifically, the brush braid 11.38.3 can be formed by braiding copper wires, thereby ensuring that the brush braid 11.38.3 is deformable.

[0295] In this embodiment, brush chamber 11.38.2 specifically comprises a sequentially connected guide section, a step section, and a frusto-conical section with a gradually decreasing diameter. An axial channel is formed within the guide section, the step section, and at least a portion of the frusto-conical section. The axial channel in the guide section primarily guides the axial movement of carbon brush 11.38.5, while the axial channels in the step section and frusto-conical section primarily serve to mount a spring. The step section forms a stepped surface with an increasing diameter, allowing the stepped surface 2.1.3 to abut the inner wall of oil inlet plate 11.1.1 around the predetermined mounting groove when brush chamber 11.38.2 is installed in the predetermined mounting groove. The frusto-conical section is provided to facilitate an interference fit and secure insertion into the predetermined mounting groove.

[0296] The frustum section defines a connection opening for connecting to the connecting section, which in turn communicates with the axial passageway, thereby facilitating soldering of the brush braid 11.38.3 to the connecting section. The brush chamber 11.38.2 can be constructed of plastic, injection molded to facilitate an interference fit with the metal oil inlet plate 11.1.1.

[0297] In this embodiment, the axial channel can be set to be coaxial with the rotating shaft 2.1, so that the carbon brush 11.38.5 is coaxial with the rotating shaft 2.1, so as to minimize the wear of the carbon brush 11.38.5 and avoid installation and maintenance.

[0298] Furthermore, the carbon brush 11.38.5 can be set as a tubular carbon brush (i.e. a hollow carbon brush 11.38.5). Firstly, the contact area with the rotating shaft 2.1 can be reduced to minimize frictional heat. Secondly, the brush braid 11.38.3 can be welded to the inside of the carbon brush 11.38.5 by grooving or other means on the inner ring surface of the tubular carbon brush.

[0299] On this basis, the carbon brush assembly 11.38 can also include an electrical conduction block 11.25, which is fixedly mounted in the axial hollow channel of the rotating shaft 2.1 and configured to abut the carbon brush 11.38.5 in the axial direction. In other words, the electrical conduction block 11.25 replaces the axial end face of the rotating shaft 2.1 in contact with the carbon brush 11.38.5. Specifically, the electrical conduction block 11.25 can be interference-pressed within the axial hollow channel to ensure stable installation and contact with the protrusion. Specifically, a corresponding embedding groove for the electrical conduction block 11.25 can be further machined at the corresponding end of the axial hollow channel of the hollow shaft.

[0300] In this embodiment, the grounding structure may specifically be a grounding bolt 11.26 installed on the oil inlet plate 11.1.1, and the grounding bolt 11.26 is connected to the ground terminal of the vehicle.

[0301] The active suspension electro-hydraulic pump assembly of this embodiment forms a branch circuit by forming the rotating shaft 2.1, the electrical conduction block 11.25, the carbon brush 11.38.5, the brush braid 11.38.3, the second grounding terminal 11.38.1, and the oil inlet plate 11.1.1, and the oil inlet plate 11.1.1 is connected to the ground terminal of the entire vehicle through the grounding bolt 11.26, thereby ensuring that the shaft voltage generated on the rotating shaft 2.1 is the same as the grounding terminal potential through the above-mentioned branch circuit, thereby avoiding corrosion of the bearings caused by the shaft current.

[0302] Example 6

[0303] This embodiment further explains the circuit board and electrical components based on the above embodiments 1 to 5.

[0304] In this embodiment, the control board 12 is provided with a signal processing unit, a control unit 12.1 and a power processing unit 12.2. The power processing unit 12.2 is provided on a surface of the control board 12 facing away from the motor.

[0305] The controller cover 9 is arranged on the side of the control board 12 facing away from the motor. The surface of the controller cover 9 facing away from the control board 12 is configured with a low-voltage power supply and signal interface 12.3 and a power supply interface 12.4. The control board 12 is communicated with the upper-level control device through the low-voltage power supply and signal interface 12.3, and the power supply is fed to the control board 12 via the power supply interface 12.4.

[0306] In this embodiment, because the signal processing unit, control unit 12.1, and power processing unit 12.2 are integrated on the same control board 12, the signal transmission path is significantly shortened. In a traditional discrete design, the signal transmission from the signal processing board to the power processing board may involve a long transmission distance and numerous intermediate links, resulting in signal delay. The integrated design of this embodiment reduces the signal transmission time between different boards, allowing the entire controller assembly to respond more quickly to commands from the upper control device. This, in turn, allows the active suspension electro-hydraulic pump system to more promptly adjust operating parameters based on the vehicle's driving status and road conditions. For example, when the vehicle is traversing uneven roads, the electro-hydraulic pump output can be more quickly controlled to maintain the stability of the vehicle's suspension. Furthermore, the integrated design reduces interference during signal transmission. In a discrete design, signals transmitted between different boards may be affected by factors such as the surrounding electromagnetic environment, resulting in signal distortion. The single-board integrated design allows signal processing and power processing to work closely together on the same board, resulting in more stable signal transmission and improved control accuracy. This enables the active suspension electro-hydraulic pump system to more accurately control the speed, pressure and other parameters of the electro-hydraulic pump, thereby more accurately adjusting the stiffness and damping of the vehicle suspension, improving the vehicle's driving comfort and handling stability.

[0307] By integrating the functions of two control boards onto a single board, the integration level is increased by over 30% compared to traditional separate board designs. This eliminates the traditional split between the control board and driver board, significantly reducing the size and volume of the controller assembly, making the entire system more compact. This provides greater flexibility in the layout and installation of the active suspension electro-hydraulic pump assembly within the limited space of the vehicle, optimizing the vehicle's interior space, improving space utilization, and facilitating installation and maintenance. Especially with many consumers favoring the convenience of mini cars, this miniaturized design makes it easier to install the electro-hydraulic pump assembly within the vehicle chassis or other confined spaces without affecting the layout and functionality of other components. The integrated design reduces the number of control boards and associated electrical connections, thereby lowering manufacturing costs. Furthermore, the single-board integrated controller assembly simplifies and swifts assembly, reducing assembly steps and time, and improving production efficiency. Furthermore, the reduced system complexity makes subsequent maintenance and repair more convenient and efficient, reducing maintenance costs and time, and improving the cost-effectiveness and practicality of the entire system.

[0308] See also Figures 42 to 46 Preferably, the control board 12 is configured to be divided into a low-voltage area, an isolation area and a high-voltage area. The low-voltage area is configured at the first end of the length extension direction of the control board 12, and the high-voltage area is configured at the second end of the length extension direction of the control board 12. The isolation area is configured between the low-voltage area and the high-voltage area. The isolation area is provided with a power isolation module and a signal isolation module to perform power isolation and signal isolation respectively.

[0309] By dividing the control board 12 into a low-voltage area, an isolation area, and a high-voltage area, the high-voltage circuit and the low-voltage circuit are strictly separated. The high-voltage area mainly processes circuits related to power supply, while the low-voltage area involves low-voltage circuits such as control signals. This partitioning design effectively prevents the high-voltage circuit from interfering with and damaging the low-voltage circuit. The high-voltage area and the low-voltage area are isolated by the isolation area, in which the power isolation module and the signal isolation module can effectively suppress the impact of electromagnetic interference generated by the high-voltage area on the signal processing unit in the low-voltage area. In the high-voltage area, the power processing of large currents may generate strong electromagnetic fields. If these electromagnetic fields act directly on the low-voltage area, they may cause problems such as signal distortion and false triggering. The existence of the isolation area is like setting up an "electromagnetic barrier" between the high-voltage area and the low-voltage area, so that the signal processing in the low-voltage area can be carried out in a relatively stable electromagnetic environment, thereby ensuring the integrity and accuracy of the signal and improving the electromagnetic compatibility of the entire controller assembly.

[0310] See also Figure 42The signal processing unit, control unit 12.1, and power processing unit 12.2 are arranged on the side of the controller cover 9 facing away from the motor. The controller cover 9 includes a low-voltage power supply and signal interface 12.3, a power supply interface 12.4, and an additional interface 12.6. The low-voltage power supply and signal interface 12.3 is used to communicate with the higher-level chassis control device, while the high-voltage power supply of the control board 12 is fed through the power supply interface 12.4. The additional interface 12.6 is provided for controlling or operating external devices.

[0311] Preferably, the low-voltage area is provided with a temperature and pressure processing unit, an angle processing unit, a temperature processing unit, a power supply module and a low-voltage power supply and signal interface 12.3. The temperature and pressure processing unit, the angle processing unit and the temperature processing unit are connected to the control unit 12.1 through a signal isolation module, and the power supply module is connected to the low-voltage power supply and signal interface 12.3. The power supply module is arranged in the first width direction close to the control board 12, and the temperature and pressure processing unit, the angle processing unit and the temperature processing unit are arranged in the second width direction close to the control board 12.

[0312] In this embodiment, the temperature and pressure processing unit, the angle processing unit and the temperature processing unit are arranged in the second width direction close to the control board 12. This layout allows each processing unit to work independently and reduces interference between them. Figure 46 For example, W1 is the first width direction, and W2 is the second width direction. The temperature and pressure processing unit includes a sampling module and a filtering module, which are sequentially arranged along the second direction. The angle processing unit includes a sampling module and a filtering module, which are sequentially arranged along the second direction. The temperature sampling unit includes a sampling module, a filtering module, and a comparison module, which are sequentially arranged along the second direction.

[0313] Preferably, the high-voltage area is provided with a temperature sampling unit, a voltage sampling unit, a current sampling unit, a control unit 12.1, a drive unit, a power supply interface 12.4, an inverter unit and a three-phase AC interface. The temperature sampling unit, the voltage sampling unit and the current sampling unit are electrically connected to the control unit 12.1 respectively, the control unit 12.1 is electrically connected to the drive unit, the inverter unit is electrically connected to the power supply interface 12.4 to receive the power voltage input by the power supply, the inverter unit is electrically connected to the motor of the active suspension electro-hydraulic pump through the three-phase AC interface, and the power supply interface 12.4 is arranged near the edge of the high-voltage area.

[0314] This embodiment rationally arranges the functional units to disperse heat sources, preventing local overheating and also avoiding electromagnetic interference between different units. For example, the inverter unit generates a certain amount of heat during operation. Placing it in a suitable location in the high-voltage area can maintain a certain distance from other units to reduce the impact of heat on other units.

[0315] During the circuit design process, this embodiment fully considered the signal flow and electromagnetic compatibility between the various functional modules. Multi-layer circuit board technology was employed to rationally allocate power and signal layers, reducing signal interference. Furthermore, based on surface mount technology (SMT) and chip-scale packaging, a large number of electronic components were densely arranged on the circuit board, significantly reducing its size. This single-board design not only reduces the number of connections between circuit boards, reducing signal transmission loss and the risk of failure, but also improves system integration and stability. For example, by integrating control signal processing and drive signal generation within the same chip, control unit 12.1, delays in signal transmission are reduced, enabling the controller to respond to sensor signals more quickly and accurately and control the operation of the electro-hydraulic pump.

[0316] In some embodiments, the high-voltage region includes a current sampling unit, a voltage sampling unit, and a temperature sampling unit. The current sampling unit is located on both sides of the driving unit and includes a sampling module, a filtering module, and a comparison module, which are arranged in sequence along the second direction. The voltage sampling unit includes a sampling module, a filtering module, and a comparison module, which are arranged in sequence along the second direction. The temperature sampling unit includes a sampling module, a filtering module, and a comparison module, which are arranged in sequence along the second direction.

[0317] In the prior art, when the active suspension system is operating, the electronic components in the controller will continue to generate heat, especially under high-load operating conditions, such as when the vehicle is continuously driving at high speed or frequently passing over bumpy roads. The heat generation of the controller will increase dramatically. The heat dissipation structure design of existing controllers is often not reasonable. Most rely on simple natural heat dissipation or small heat sinks, which cannot meet the demand for rapid heat dissipation. Prolonged high-temperature environments will cause the performance of electronic components to degrade or even damage them, seriously affecting the service life and stability of the controller. For example, the on-resistance of power transistors will increase at high temperatures, resulting in increased power loss, further exacerbating heat generation, forming a vicious cycle, and ultimately may lead to controller failure.

[0318] See also Figure 5 Preferably, the outer surface of the controller cover 9 is provided with heat dissipation fins 9.1, and the heat dissipation fins 9.1 are of a wavy or interdigitated structure.

[0319] This embodiment is based on the basic idea of ​​adopting a single control board 12, and an optimized heat dissipation structure design is performed. Large-area heat dissipation fins 9.1 are provided on the outer surface of the controller cover 9. The heat dissipation fins 9.1 are made of aluminum alloy, which has good thermal conductivity and heat dissipation effect. The shape of the fins adopts a wavy or forked-finger structure, which effectively increases the heat dissipation area. Under the same working conditions, compared with the traditional heat dissipation design, the operating temperature of the controller can be reduced by more than 10°C, which effectively extends the service life of the electronic components and ensures the stable operation of the controller under various harsh working conditions. This not only improves the reliability of the active suspension system, but also reduces the possibility of performance degradation and failure due to overheating of the controller.

[0320] Preferably, a thermally conductive pad is provided on the inner surface of the controller cover 9 , and the thermally conductive pad is configured to contact the electronic components on the surface of the control board 12 .

[0321] In this embodiment, thermal conductive pads are also provided on the inner surface of the controller cover 9 and on the top of the electronic components of the circuit board to further enhance the heat conduction effect.

[0322] Continue to see Figure 43 Preferably, thermal grease 9.2 is provided between the inner surface of the controller cover 9 and the thermal pad.

[0323] In this embodiment, high-conductivity thermal grease 9.2 is applied between the metal housing and the thermal pad to ensure rapid and efficient heat transfer from the thermal pad to the metal housing. When the controller is operating, heat generated by the electronic components is first transferred through the thermal pad to the thermal grease 9.2, then to the metal housing, where it is finally dissipated into the surrounding air by the heat sink fins 9.1.

[0324] Figure 43 The positions of components such as the inner heat dissipation extension 9.3, thermal grease 9.2, and power processing unit 12.2 are clearly marked. On the control board 12, the power processing unit 12.2 is located on the side of the control board 12 facing the controller cover 9 and contacts the controller cover 9 via the thermal grease 9.2 and the inner heat dissipation extension 9.3.

[0325] In some embodiments, to further improve heat dissipation efficiency, a small cooling fan can be installed around the heat sink 9.1 to accelerate air flow through forced air cooling, removing more heat. This top-surface heat dissipation structure design ensures that the controller temperature remains within a reasonable range during long-term, high-load operation, ensuring the normal operation of electronic components and extending the life of the controller.

[0326] Preferably, the control board 12 extends along the length direction of the integrated motor housing 6 .

[0327] In the embodiment example, the control board 12 is arranged laterally on the integrated motor housing 6 and extends basically over the entire integrated motor housing 6, which allows the path between the control board 12 and all components to be regulated (motor, sampling module, pressure sensor, etc.) to be shorter.

[0328] In addition, existing controllers have deficiencies in the design of high- and low-voltage connectors when connecting to external circuits. On the one hand, the connector connection method is not stable enough. During vehicle operation, due to vibration and bumps, the connector can easily loosen, resulting in poor contact and affecting power and signal transmission. On the other hand, the specifications and interface standards of the connectors are not unified. During actual assembly and maintenance, a variety of different types of cables and connectors are required, which increases the difficulty and cost of operation and reduces the reliability of the connection. Furthermore, when assembling the controller with the electro-hydraulic pump, the existing design lacks a convenient and reliable connection method. The assembly process often requires complex positioning and tightening operations, which consumes a lot of time and manpower. Moreover, during vehicle operation, due to vibration and mechanical stress, the connection parts can easily loosen, affecting the coordinated operation between the electro-hydraulic pump and the controller, and reducing the response speed and control accuracy of the active suspension system.

[0329] Preferably, a control board quick-plug connector 12.8 and an AC quick-plug spring clip 12.7 are provided on the side of the control board 12 facing the motor. A positioning slot is provided on the control board 12 to form a limited installation with the integrated motor housing 6. During installation, the control board cable 8.9 of the sampling module is inserted into the control board quick-plug connector 12.8 of the control board 12, and the AC phase line terminal of the motor assembly is inserted into the AC quick-plug spring clip 12.7.

[0330] The connector in this embodiment adopts a modular design and is divided into two parts: a high-voltage connector and a low-voltage connector, which are used to connect power and signal lines, respectively. The connector housing is made of high-strength engineering plastic, which has excellent insulation properties and mechanical strength. Inside the connector, elastic contact pieces and a locking connection structure are used. When the plug is inserted into the socket, the elastic contact pieces tightly fit the cable conductor, ensuring a good electrical connection. The locking structure also securely locks the plug and socket together to prevent loosening due to vibration. It should be noted that the connector interface adopts a standardized design that complies with common electrical connection standards in the automotive industry, facilitating quick assembly with cables of various specifications. The connector layout takes into account actual usage requirements, placing the high-voltage and low-voltage connectors on the same side of the controller for easy operation and maintenance. This integrated high- and low-voltage connector design not only improves connection reliability and stability, but also simplifies the assembly process and reduces costs. The connector's locking connection structure and standardized interface design ensure stable power and signal transmission and reduce the risk of failures caused by loose connections. The quick-assembly design with the motor subassembly significantly shortens assembly time, improves production efficiency, and facilitates subsequent maintenance and replacement. This convenient and reliable connection method provides a strong guarantee for the efficient operation of the active suspension system.

[0331] Figure 44 The structure and assembly diagram of the integrated high and low voltage connectors are shown, showing the internal structure and connection method of the connectors. The low voltage power supply and signal interface 12.3 is used to control the communication between the control board 12 and the upper chassis control device, while the high voltage level power supply voltage of the control board 12 is fed through the power supply interface 12.4. For example, in this embodiment, an integrally bent high voltage power supply interface is selected to connect to the control board 12. Figure 45 As an optional method, the power supply interface 12.4 can also be a straight head type and connected to the control board 12 through the adapter 12.5. The connection between the power supply interface 12.4 and the adapter 12.5 can be a hard connection or a soft connection, which is not limited here. Figure 2The schematic diagram of the structure of the assembly connection between the control board 12 and the integrated motor housing 6 is shown, showing key structures such as the positioning slot and the fastening bolt hole and the assembly steps. During the assembly process, the FPC cable of the sampling module in the integrated motor housing 6 is first inserted into the control board quick-plug connector 12.8 of the control board 12. The control board quick-plug connector 12.8 is located at the bottom of the control board 12. An automotive-grade quick push-lock connector is selected to facilitate quick assembly operations. Then, the positioning slot of the control board 12 is aligned with the positioning protrusion on the integrated motor housing 6 and gently pushed in to complete the preliminary positioning. This ensures that the AC phase line terminal on the integrated motor housing 6 is accurately inserted into the middle of the AC quick-plug spring 12.7 of the controller unit. Finally, the two are tightly fixed by passing the fastening bolt through the bolt hole. In order to further enhance the stability of the connection, rubber buffer pads are used for buffering at the connection between the positioning slot and the fastening bolt to reduce the damage to the connecting components caused by the stress generated by vibration.

[0332] Furthermore, to facilitate convenient, reliable, and quick assembly with the integrated motor housing 6, dedicated positioning slots and fastening bolt holes are designed on the side of the controller. The positioning slots utilize a dovetail or T-slot structure, precisely mating with the positioning protrusions on the integrated motor housing 6, enabling quick and easy initial positioning of the controller and motor housing 6. The positioning and dimensions of the fastening bolt holes are carefully planned to ensure uniform tightening force when fastening bolts are used for connection, securing the controller and motor subassembly together. During assembly, first, plug the sampling module FPC cable from the motor subassembly into the controller unit's control board quick-connect connector 12.8. The control board quick-connect connector 12.8 is located on the bottom of the circuit board and uses an automotive-grade quick-release connector for easy and quick assembly. Then, align the controller's positioning slots with the positioning protrusions on the integrated motor housing 6 and gently push in to complete the initial positioning. This ensures that the AC phase terminal on the integrated motor housing 6 is accurately inserted between the AC quick-connect springs 12.7 on the controller unit. Finally, secure the two together by inserting the fastening bolts through the bolt holes.

[0333] In some embodiments, to further enhance the stability of the connection, rubber cushions are used at the connection points between the positioning slots and the fastening bolts to reduce damage to the connecting components caused by vibration-induced stress. This design not only ensures accurate and convenient assembly, but also ensures a stable connection between the controller and the integrated motor housing 6 during vehicle operation, preventing vibration or displacement from affecting the normal operation of the system.

[0334] This embodiment's innovative single-board design reduces the number of circuit boards and interconnects, lowering hardware costs. Combined with an optimized heat dissipation structure, it eliminates the need for complex water cooling systems, reducing equipment acquisition and maintenance costs. The integrated connectors and quick assembly design improve production efficiency and reduce labor and time costs. Overall, this embodiment improves product performance while effectively controlling costs, delivering significant economic benefits to both automakers and users.

[0335] This embodiment integrates signal processing and power processing on a single circuit board, achieving a high degree of integration. This integrated design significantly reduces electrical connections between control boards, lowering system complexity and failure risks while improving system reliability and stability. Furthermore, this integrated design enables more direct and rapid signal transmission, minimizing signal transmission delays and interference, thereby improving system response speed and control accuracy, better meeting the requirements for fast and precise control of automotive active suspension electro-hydraulic pump assemblies.

[0336] This embodiment aims to comprehensively address the challenges of existing active suspension electro-hydraulic pump controllers. Through innovative design concepts and advanced technical means, a highly integrated controller assembly is developed, featuring efficient heat dissipation, reliable connections, and easy assembly. This achieves high levels of controller hardware integration and simplifies the system architecture. Optimized heat dissipation ensures stable controller operation under various operating conditions. Improved connector and assembly design enhances connection reliability and convenience, significantly improving the overall performance and reliability of active suspension systems and providing the automotive industry with a more advanced and practical active suspension control solution.

[0337] See Figure 47 and Figure 48 The specific structure of the electrical connection portion 8.6 of this embodiment is further described below:

[0338] In this embodiment, the AC quick-plug spring 12.7 on the control board 12 may specifically include a power supply side three-phase terminal 12.7.1 and a three-phase clamping portion 12.7.2, and the fixed bracket 8.5 is provided with a bracket plug-in slot 8.5.1.

[0339] The electrical connection part 8.6 is fixed with a three-phase terminal 8.6.2 on the receiving side and a plug-in part 8.6.3. The electrical connection part 8.6 is made of an injection molding process, so that the three-phase terminal 8.6.2 on the receiving side is integrated and fixed with the electrical connection part 8.6. That is, the three-phase terminal 8.6.2 on the receiving side is made of metal material, and other areas of the electrical connection part 8.6 are mostly made of thermoplastic plastic to form an integrated insulating package. There are no welding points or bolt connection points between the three-phase terminal 8.6.2 on the receiving side and the main body of the electrical connection part 8.6, which greatly improves the connection firmness and stability of the three-phase terminal 8.6.2 on the receiving side and the electrical connection part 8.6.

[0340] The three-phase terminal 8.6.2 on the receiving side is electrically connected to the three-phase terminal 12.7.1 on the power supply side and the three-phase port of the motor respectively, so that the electric energy output by the external power supply can be transmitted to the motor in sequence through the power supply part and the electrical connection part 8.6.

[0341] The plug-in part 8.6.3 and the bracket plug-in slot 8.5.1 realize plug-in connection. When the plug-in part 8.6.3 is fully inserted into the bracket plug-in slot 8.5.1, the power supply part, the electrical connection part 8.6 and the motor can maintain a relatively fixed position, that is, the fixed connection function of the power supply part, the electrical connection part 8.6 and the motor is realized.

[0342] In this embodiment, the power supply unit also includes a power supply side PCBA circuit board (i.e., the above-mentioned control single board 12), and the power supply side three-phase terminal 12.7.1 is electrically connected to the power supply side PCBA circuit board, and the power supply side PCBA circuit board is used to adjust the power parameters supplied to the motor.

[0343] The three-phase terminal 12.7.1 on the power supply side is provided with a three-phase clamping part 12.7.2. In one embodiment, the three-phase clamping part 12.7.2 is a clamping claw structure with a middle opening. When the pin of the three-phase terminal 8.6.2 on the power supply side is inserted into the middle opening of the three-phase clamping part 12.7.2 of the three-phase terminal 12.7.1 on the power supply side, the clamping claw structures on both sides of the three-phase clamping part 12.7.2 will apply a clamping force to both sides of the three-phase terminal 8.6.2 on the power receiving side, thereby achieving the fixed connection function of the three-phase terminal 12.7.1 on the power supply side and the three-phase terminal 8.6.2 on the power receiving side. Through the above connection method, the portability and stability of the connection between the three-phase terminal 12.7.1 on the power supply side and the three-phase terminal 8.6.2 on the power receiving side can be effectively improved.

[0344] In this embodiment, electrical connection portion 8.6 further includes a stator three-phase electrical wire 8.6.4. The first end of stator three-phase electrical wire 8.6.4 is electrically connected to the three-phase port of the motor, and the second end of stator three-phase electrical wire 8.6.4 is electrically connected to the receiving-side three-phase terminal 8.6.2. Specifically, the conductive core wires of stator three-phase electrical wire 8.6.4 and the conductive areas of the three-phase port of the motor and the receiving-side three-phase terminal 8.6.2 can be electrically connected by soldering or resistance welding.

[0345] In this embodiment, the bracket plug-in slot 8.5.1 is a semi-open groove-shaped structure, which can be selected as a semicircular or rectangular structure. The plug-in portion 8.6.3 is adapted to the shape of the bracket plug-in slot 8.5.1. When the plug-in portion 8.6.3 is plugged into the bracket plug-in slot 8.5.1, the plug-in portion 8.6.3 and the bracket plug-in slot 8.5.1 are fixedly connected by interference fit or bonding, thereby achieving the effect of fixing the relative positions of the power supply portion, the electrical connection portion 8.6 and the motor.

[0346] In this embodiment, bracket screw bushings 8.6.5 are provided on both sides of the electrical connection part 8.6, and bracket screw holes 8.5.2 are provided at the relative position of the fixed bracket 8.5. When the plug-in part 8.6.3 is fully inserted into the bracket plug-in slot 8.5.1, the bracket screw bushings 8.6.5 and the bracket screw holes 8.5.2 are vertically opposite to each other, and the bracket screws 8.5.3 are sequentially passed through the bracket screw bushings 8.6.5 and the bracket screw holes 8.5.2, so that the electrical connection part 8.6 is fixedly connected to the fixed bracket 8.5, further improving the connection stability of the electrical connection part 8.6 and the fixed bracket 8.5.

[0347] In this embodiment, the bracket screw bushing 8.6.5 is made of cold-rolled steel plate to improve the mechanical properties of the bracket screw bushing 8.6.5, and the surface of the bracket screw bushing 8.6.5 is coated with a zinc-nickel plating layer to ensure the salt spray reliability performance of the bracket screw bushing 8.6.5.

[0348] In this embodiment, the surface of the receiving-side three-phase terminal 8.6.2 is coated with a silver plating layer to reduce the contact resistance between the power supply-side three-phase terminal 12.7.1 and the receiving-side three-phase terminal 8.6.2, thereby preventing abnormal temperature rise.

[0349] In this embodiment, a receiving cavity 8.6.6 is further provided inside the electrical connection portion 8.6. An angle sensor assembly 8.6.1 is placed in the receiving cavity 8.6.6. The angle sensor assembly 8.6.1 is used to measure the rotation angle data of the rotating shaft 2.1.

[0350] In this embodiment, the size of the angle sensor assembly 8.6.1 is adapted to the size of the accommodating cavity 8.6.6, and the inner wall of the accommodating cavity 8.6.6 is provided with a number of clips 8.6.7 for limiting the angle sensor assembly 8.6.1 to prevent the angle sensor assembly 8.6.1 from moving in the accommodating cavity 8.6.6.

[0351] A supporting platform 8.6.8 for supporting the angle sensor assembly 8.6.1 is provided on the edge of the bottom surface of the accommodating cavity 8.6.6. When the angle sensor assembly 8.6.1 is placed in the accommodating cavity 8.6.6, the bottom surface of the angle sensor assembly 8.6.1 is in direct contact with the top surface of the supporting platform 8.6.8. There is a gap between the bottom surface of the angle sensor assembly 8.6.1 and the bottom surface of the accommodating cavity 8.6.6, which prevents the components on the PCBA circuit board from being squeezed and is used to improve the heat dissipation effect of the angle sensor assembly 8.6.1.

[0352] In this embodiment, electrical connection portion 8.6 is provided with a plurality of wiring holes 8.6.9, through which control panel cable 8.9 can be passed. Wiring holes 8.6.9 are used to secure control panel cable 8.9. A first end of control panel cable 8.9 is electrically connected to angle sensor assembly 8.6.1, and a second end of control panel cable 8.9 is electrically connected to an external controller. Control panel cable 8.9 is used to transmit measurement data from angle sensor assembly 8.6.1 to control board 12, and to transmit control signals from control board 12 to angle sensor assembly 8.6.1. Specifically, the connection between control panel cable 8.9 and angle sensor assembly 8.6.1 can be achieved by welding or snap-fitting 8.6.7. The connection point between control panel cable 8.9 and angle sensor assembly 8.6.1 can be further secured with adhesive tape.

[0353] See Figure 49 The following further describes the signal transmission related contents of the two electrical connection parts 8.6 in this embodiment:

[0354] In this embodiment, the angle sensor assembly 8.6.1 is provided with a temperature and pressure sensor connector, which is electrically connected to the pump cavity temperature and pressure sensor board 8.2 through the pump cavity temperature and pressure sensor cable 8.4.

[0355] By configuring a temperature and pressure sensor connector on the angle sensor component 8.6.1, the temperature and pressure information can be aggregated through the angle sensor component 8.6.1 and sent to the control board 12, thereby improving the integration of the product. The temperature and pressure sensors are connected to the board cable through an independent connector, which facilitates maintenance and replacement, while reducing the complexity of the signal transmission line.

[0356] Preferably, the angle sensor assembly 8.6.1 comprises an angle sensor circuit 8.6.1.1, which converts the rotation angle of the corresponding shaft 2.1 into a digital signal through magnetoelectricity and sends it to the control board 12.

[0357] The angle sensor circuit 8.6.1.1 is integrated with the temperature and pressure sensor circuits via a transfer cable 8.8 and a control board cable 8.9, reducing the number of wiring harnesses and the complexity of the controller interface. The modular design facilitates calibration and maintenance, reducing vehicle production costs.

[0358] Preferably, the angle sensor assembly 8.6.1 further comprises a temperature and pressure sensor signal processing circuit, which is used to convert the fluid temperature and pressure values ​​in the corresponding pump chamber into electrical signals respectively.

[0359] The temperature and pressure sensor signal processing circuit converts the fluid temperature and pressure values ​​within the two pump chambers into electrical signals, enabling real-time acquisition of key hydraulic system parameters (temperature and pressure). Furthermore, the controller combines the rotor position signal from the angle sensor with temperature and pressure data to dynamically adjust motor speed, hydraulic flow, or valve opening using algorithms such as PID and model predictive control, achieving more precise suspension stiffness and height adjustment.

[0360] Preferably, angle sensor assembly 8.6.1 is equipped with a stator temperature sensor connector, which is electrically connected to stator temperature sensor harness 8.7. This directly monitors the stator winding temperature, providing real-time feedback on the motor's thermal status. This allows the controller to dynamically adjust the motor's output power or hydraulic load to prevent faults such as insulation aging and winding burnout caused by overload or insufficient heat dissipation. Two temperature sensors can monitor the stator temperatures of the two motors separately, enabling differentiated cooling or power limiting, and preventing the risk of local overheating from being masked by a single temperature measurement point.

[0361] See Figure 50 The specific structure of the pump chamber temperature and pressure sensor plate 8.2 of this embodiment is further described below:

[0362] In this embodiment, the main body of the pump chamber temperature and pressure sensor board 8.2 is a PCB board structure, and a temperature and pressure sensor interface 8.2.3, a pump chamber temperature and pressure signal processing circuit 8.2.4 and a pump chamber temperature and pressure sensor board connector 8.3 are provided in the pump chamber temperature and pressure sensor board 8.2. The temperature and pressure sensor interface 8.2.3 is electrically connected to the input end of the pump chamber temperature and pressure signal processing circuit 8.2.4, and the output end of the pump chamber temperature and pressure signal processing circuit 8.2.4 is electrically connected to the pump chamber temperature and pressure sensor board connector 8.3.

[0363] The pump chamber temperature and pressure sensor board 8.2 is configured as follows: the temperature and pressure sensor interface 8.2.3 is used to couple with the output pins of the temperature and pressure sensor for measuring the temperature and pressure parameters of the hydraulic medium; the pump chamber temperature and pressure signal processing circuit 8.2.4 is used to perform anti-electromagnetic interference and filtering processing on the original temperature and pressure signals output by the temperature and pressure sensor; the pump chamber temperature and pressure sensor board connector 8.3 is used to output the processed temperature and pressure signals to the angle sensor assembly 8.6.1 external controller.

[0364] That is, in this embodiment, the temperature and pressure sensors are no longer directly connected to the angle sensor assembly 8.6.1 through separate wiring harnesses and connectors. Instead, the temperature and pressure signals are uniformly transferred by the pump chamber temperature and pressure sensor board 8.2, effectively reducing the messy and complex arrangement of wiring harnesses and connectors. Based on the pump chamber temperature and pressure signal processing circuit 8.2.4, anti-electromagnetic interference and filtering processing are performed on the temperature and pressure signals, which can effectively improve the quality of the temperature and pressure signals.

[0365] In this embodiment, a plurality of temperature and pressure sensor interfaces 8.2.3 are provided in the pump cavity temperature and pressure sensor board 8.2, and the plurality of temperature and pressure sensor interfaces 8.2.3 are electrically connected to the input ends of the pump cavity temperature and pressure signal processing circuit 8.2.4, respectively. Each group of temperature and pressure sensor interfaces 8.2.3 can correspond to a group of temperature and pressure sensors, that is, a single pump cavity temperature and pressure sensor board 8.2 can be connected to multiple groups of temperature and pressure sensors at the same time. In this embodiment, multiple groups of temperature and pressure sensors can be used to measure the temperature and pressure parameters of the hydraulic medium at different positions in the same hydraulic pump 11, or to realize redundant measurement of the hydraulic medium in the same hydraulic pump 11, thereby improving the accuracy of the temperature and pressure parameter measurement.

[0366] In this embodiment, the temperature and pressure sensor interface 8.2.3 adopts a blind hole structure. The blind hole structure connects the surface layer and one or more internal layers of the PCB board, but does not penetrate the entire PCB board. The metal layer of the hole wall of the temperature and pressure sensor interface 8.2.3 is electrically connected to the input end of the pump chamber temperature and pressure signal processing circuit 8.2.4.

[0367] In this embodiment, the temperature and pressure sensor interface 8.2.3 and the output pin of the temperature and pressure sensor are fixedly connected by interference fit or welding. In this embodiment, if the output pin of the temperature and pressure sensor is a spring pin, during the assembly process of the temperature and pressure sensor and the pump chamber temperature and pressure sensor board 8.2, based on the blind hole structure of the temperature and pressure sensor interface 8.2.3, the alignment and plug-in fixation between the output pin of the temperature and pressure sensor and the temperature and pressure sensor interface 8.2.3 can be conveniently and accurately achieved to ensure connection reliability.

[0368] In this embodiment, a plurality of pump cavity temperature and pressure fixing holes 8.2.2 are provided in the pump cavity temperature and pressure sensor board 8.2. The pump cavity temperature and pressure fixing holes 8.2.2 adopt a through-hole structure. The through-hole structure refers to penetrating from one side of the PCB board to the other side to form a through hole on the PCB board. The pump cavity temperature and pressure fixing holes 8.2.2 are used to penetrate M3 screws 8.2.1 to fix the pump cavity temperature and pressure sensor board 8.2 to the preset position of the oil outlet plate 5, so that the pump cavity temperature and pressure sensor board 8.2 can achieve position fixation in the electro-hydraulic pump.

[0369] In this embodiment, the hole wall of the pump chamber temperature and pressure fixing hole 8.2.2 is provided with a metal layer, the M3 screw 8.2.1 is made of metal material, and the metal layer of the hole wall of the pump chamber temperature and pressure fixing hole 8.2.2 is electrically connected to the pump chamber temperature and pressure signal processing circuit 8.2.4 and the ground terminal. In this embodiment, the preset position of the electro-hydraulic pump includes a pump casing 11.1, that is, when the pump casing 11.1 is used as the ground terminal, by connecting the metal hole wall of the pump chamber temperature and pressure fixing hole 8.2.2 to the ground terminal, the pump chamber temperature and pressure signal processing circuit 8.2.4 is electromagnetically shielded and grounded, thereby improving the anti-EMC interference capability of the pump chamber temperature and pressure sensor board 8.2 and improving the quality of the sensor signal.

[0370] In this embodiment, the pump chamber temperature and pressure sensor board connector 8.3 is communicated with the angle sensor assembly 8.6.1 through a single shielded cable. Multiple interfaces are provided in the pump chamber temperature and pressure sensor board connector 8.3. The single shielded cable may include multiple groups of wire cores. Different wire cores correspond one-to-one to different interfaces in the pump chamber temperature and pressure sensor board connector 8.3 and are used to transmit temperature and pressure signals of different temperature and pressure sensors, thereby reducing the number of conventional wiring harnesses used.

[0371] Example 7

[0372] This embodiment provides a chassis axle, comprising the active suspension electro-hydraulic pump assembly of any of the above embodiments.

[0373] And, there is a first hydraulically adjustable shock absorber and a second hydraulically adjustable shock absorber, each of which is hydraulically connected to a corresponding hydraulic pump 11. The first hydraulically adjustable shock absorber and the second hydraulically adjustable shock absorber each have two dampers or pressure chambers, and the two electrohydraulic pumps mentioned above are hydraulically connected to the pressure chambers of the two hydraulically adjustable shock absorbers. Thus, for example, "soft" or "hard" damping can be set by damping or throttling the electrohydraulic pump, such as more or less pressure shocks / pressure fluctuations from the pressure chamber. In this case, the respective electrohydraulic pump is thus driven hydraulically, so that the electric motor of the electrohydraulic pump can be operated as a motor generator and thus can recover electrical energy (recovery). In addition, the zero position or rest position of the shock absorber can also be set actively or specifically, and can also be changed (continuously) during driving operation (active chassis).

[0374] Example 8

[0375] This embodiment provides a chassis system, including the active suspension electro-hydraulic pump assembly of any of the above embodiments.

[0376] There are first and second hydraulically adjustable shock absorbers, each hydraulically connected to a corresponding hydraulic pump 11. The first and second hydraulically adjustable shock absorbers are assigned to a common chassis axle, or the first and second hydraulically adjustable shock absorbers are arranged on a common chassis axle.

[0377] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the scope of protection of the present invention.

Claims

1. An active suspension electro-hydraulic pump assembly, characterized in that: include: a first electro-hydraulic pump group and a second electro-hydraulic pump group, each of the first electro-hydraulic pump group and the second electro-hydraulic pump group comprising a hydraulic pump and an electric motor for driving the hydraulic pump; a circuit board, configured to control the first electro-hydraulic pump group and the second electro-hydraulic pump group; It is characterized by further comprising an integrated motor housing and a controller cover; The integrated motor housing is configured to have two motor cavities arranged in the axial direction and with openings located at both ends, and a circuit board mounting surface located in the circumferential direction thereof; the two motor cavities are respectively used to mount the two motors; The controller cover is configured to cover the circuit board mounting surface and form a controller cavity, and the circuit board is mounted in the controller cavity and parallel to the axis; Among them, two potting glue openings are provided on the mounting surface of the circuit board, and the two potting glue openings respectively penetrate to the bottom surface of the corresponding motor cavity, and the two potting glue openings are both located in the controller cavity; the two potting glue openings and the two openings of the motor cavity are configured to cooperate with the corresponding potting tooling in the assembly process to simultaneously carry out the filling and curing processes of the potting glue.

2. The active suspension electro-hydraulic pump assembly according to claim 1, characterized in that: The circuit board is a control board; The control board is provided with a signal processing unit, a control unit and a power processing unit.

3. The active suspension electro-hydraulic pump assembly according to claim 2, characterized in that: The power processing unit is arranged on a surface of the control board facing away from the motor, and the heat generated by the power processing unit is configured to be transferred to the controller cover for heat dissipation.

4. The active suspension electro-hydraulic pump assembly according to claim 1, characterized in that: The integrated motor housing is configured to further have an intermediate cavity located between the two motor cavities; The intermediate cavity is connected to the controller cavity, and a signal relay control unit corresponding to the two motors is provided in the intermediate cavity; The signal relay control unit is configured to collect preset parameter data groups and integrate and relay them to the circuit board.

5. The active suspension electro-hydraulic pump assembly according to claim 4, characterized in that: The signal relay control unit includes a fixing bracket and two electrical connection parts; The fixing bracket is installed in the middle cavity, and the fixing bracket has a first accommodating portion and a second accommodating portion that are arranged opposite to each other; The two electrical connection parts are respectively plugged into the first accommodating part and the second accommodating part; the two electrical connection parts are respectively provided with a Hall sensor matching the corresponding motor shaft; The two electrical connection parts are respectively connected to the circuit board through a control board cable; or the two electrical connection parts are connected through a transfer cable, and one of the electrical connection parts is connected to the circuit board through a control board cable.

6. The active suspension electro-hydraulic pump assembly according to claim 5, characterized in that: The electrical connection portion is configured to be electrically connected to a pump cavity temperature and pressure sensor board installed on the corresponding hydraulic pump through a pump cavity temperature and pressure sensor cable; A cable opening is provided on a side of the circuit board mounting surface close to the hydraulic pump, and the pump cavity temperature and pressure sensor cable is configured to be connected to the pump cavity temperature and pressure sensor board through a slot in the cable opening.

7. The active suspension electro-hydraulic pump assembly according to claim 5, characterized in that: The electrical connection portion is fixed with a three-phase terminal on the power receiving side, and the three-phase terminal on the power receiving side is electrically connected to the three-phase port corresponding to the motor; the circuit board is respectively provided with a three-phase terminal on the power supply side that matches the two three-phase terminals on the power receiving side; Among them, the three-phase terminal on the power supply side is provided with a three-phase clamping part, and the three-phase terminal on the power receiving side is configured to be inserted into the three-phase clamping part, and the fixed connection between the three-phase terminal on the power supply side and the three-phase terminal on the power receiving side is achieved based on the clamping action of the three-phase clamping part.

8. The active suspension electro-hydraulic pump assembly according to claim 1, characterized in that: The hydraulic pump is an internal gear pump; The internal gear pump includes a pump housing, a filling piece and an internal gear set; A working space is defined in the pump housing, the internal meshing gear set is arranged in the working space, and a first fluid port and a second fluid port communicating with the working space are provided on the pump housing; The internally meshing gear set includes a first gear having external teeth and a second gear having internal teeth, the first gear being configured to rotate when driven by a rotating shaft of the motor, and the second gear being configured to mesh with the first gear in a meshing area, and forming a fluid space away from the meshing area between the first gear and the second gear; The filling member is arranged in the fluid space and divides the fluid space into a first fluid cavity and a second fluid cavity located on both sides of the fluid space in a circumferential direction, the first fluid cavity is connected to the first fluid port via a first fluid channel, and the second fluid cavity is connected to the second fluid port via a second fluid channel; The first gear and the second gear have involute tooth profiles or linear conjugate tooth profiles, and the number of teeth of the first gear and the number of teeth of the second gear are in a mutually prime tooth ratio.

9. The active suspension electro-hydraulic pump assembly according to claim 8, characterized in that: It also includes two axial compensation units respectively arranged at the two axial ends of the internally meshing gear set; both of the axial compensation units are configured to be axially pressed against the first gear and / or the second gear under the action of the compensation force.

10. The active suspension electro-hydraulic pump assembly according to claim 9, characterized in that: A third fluid chamber is also formed in the fluid space, located between the first fluid chamber and the second fluid chamber, and the fluid pressure in the third fluid chamber is located between the first fluid chamber and the second fluid chamber; wherein, the axial compensation unit is provided with an oil channel connected to the third fluid chamber, and the axial compensation unit is provided with a pressure balance chamber on the side away from the internal meshing gear set, and the oil channel is configured to guide the oil in the third fluid chamber into the pressure balance chamber to balance the deflection force acting on the axial compensation unit by the fluid pressure difference between the first fluid chamber and the second fluid chamber.

11. The active suspension electro-hydraulic pump assembly according to claim 8, characterized in that: A third fluid cavity is further formed in the fluid space and is located between the first fluid cavity and the second fluid cavity; Wherein, the rotating shaft is a hollow shaft, and the hollow inner cavity of the rotating shaft is respectively connected to the third fluid cavity and the sealed wet cavity in the motor, and the sealed wet cavity is respectively connected to the first fluid cavity and the second fluid cavity through two pressure relief check structures on the pump casing.

12. The active suspension electro-hydraulic pump assembly according to claim 11, characterized in that: The pressure relief check structure includes an oil discharge channel, an oil discharge seal and an oil discharge elastic member opened on the pump housing; One end of the oil unloading channel is connected to the sealed wet chamber, and the other end of the oil unloading channel is connected to the first fluid chamber or the second fluid chamber; a section of the inner wall of the oil unloading channel extends inward to form an annular check surface, and the annular check surface is arranged toward the fluid space; The oil unloading seal is movably connected in the oil unloading channel; The elastic member is connected to the sealing member, and the sealing member is configured to abut against the annular check surface under the elastic force of the oil unloading elastic member to close the oil unloading channel.

13. The active suspension electro-hydraulic pump assembly according to claim 1, characterized in that: The electric motor includes a stator module, a rotor module and a bearing base. The bearing base and the corresponding hydraulic pump are sealed and connected to both ends of the stator module and cooperate to form a sealed wet cavity connected to the pump cavity of the hydraulic pump. The rotating shaft of the rotor module is rotatably connected to the bearing base and the hydraulic pump, and the rotating shaft is transmission-connected to the pump head assembly of the hydraulic pump.

14. The active suspension electro-hydraulic pump assembly according to claim 13, characterized in that: The rotor module also includes a silicon steel sheet assembly, a plurality of magnetic steels and injection molded parts; A plurality of magnetic steel slots are distributed on the silicon steel sheet assembly, and the magnetic steel is arranged in the magnetic steel slots; The injection molded part includes a plurality of filling parts and connecting parts respectively located at both ends of the silicon steel sheet assembly; the silicon steel sheet assembly is provided with a plurality of injection holes, the filling parts are filled in the injection holes, and the two ends of the filling parts are respectively connected to the connecting parts; The rotating shaft is connected to the rotating shaft hole on the silicon steel sheet assembly, and an induction magnet is provided at one end of the rotating shaft away from the hydraulic pump.

15. The active suspension electro-hydraulic pump assembly according to claim 13, characterized in that: The stator module includes a stator tooth component, a stator yoke, a stator winding and a plastic part; The stator tooth component includes a plurality of stator teeth, and a reinforcing rib is provided between adjacent stator teeth for connection; the stator yoke is sleeved and connected to the outside of the stator tooth component; the stator winding is connected to the stator tooth component; the plastic component wraps the stator tooth component and the stator winding, and fills the gap between the stator tooth component, the stator yoke and the stator winding; and a portion of the surface of the plastic component forms the stator inner wall of the stator module; Wherein, both ends of the inner wall of the stator are respectively configured to have stator sealing connection sections, and the two stator sealing ends are respectively sealedly connected to the bearing base and the hydraulic pump through sealing elements; It also includes two support sleeves, which are inserted into the plastic part from both ends in the axial direction; and the support sleeves are configured to support the corresponding stator sealing connection section to prevent the sealing connection section from deforming due to temperature changes and affecting the compression rate of the sealing ring.

16. The active suspension electro-hydraulic pump assembly according to claim 1, characterized in that: The rotating shaft of the motor is drivingly connected to the pump head assembly of the hydraulic pump, and the pump housing of the hydraulic pump includes an oil inlet plate and an oil outlet plate connected to each other; an axial gap is provided between the rotating shaft and the oil inlet plate; Also included are an elastic conductive structure and a grounding structure; The elastic conductive structure is installed in the axial gap, and the elastic conductive structure is configured to be clamped between the oil inlet plate and the axial end surface of the rotating shaft in a preset compression state; The grounding structure is mounted on the oil inlet plate, and the grounding structure is configured to be connected to an external ground terminal; Wherein, the axial expansion and contraction amount of the elastic conductive structure in the preset compression state is greater than the axial movement amount of the rotating shaft.

17. The active suspension electro-hydraulic pump assembly according to claim 16, characterized in that: The oil outlet plate is installed at the opening of the motor cavity; The grounding structure includes a grounding bolt, a metal bracket, a grounding gasket and a flexible grounding wire; The grounding bolt includes a first threaded section, a shock-absorbing mounting section and a second threaded section arranged in sequence in the axial direction; the first threaded section is threadedly connected to the oil inlet plate and the oil outlet plate, and the first threaded section is in conductive contact with the oil inlet plate and the oil outlet plate; the metal bracket is installed at the external grounding end, and the metal bracket is configured to be elastically connected to the shock-absorbing mounting section through a shock-absorbing ring; the grounding gasket is sleeved on the second threaded section, and the grounding gasket is locked to the shock-absorbing ring through a grounding nut; the two ends of the flexible grounding wire are electrically connected to the metal bracket and the grounding gasket respectively.

18. A chassis axle, characterized in that: comprising the active suspension electro-hydraulic pump assembly according to any one of claims 1 to 17; Also, there are a first hydraulically adjustable shock absorber and a second hydraulically adjustable shock absorber respectively hydraulically connected to the corresponding hydraulic pump.

19. A chassis system for a vehicle, characterized in that: comprising the active suspension electro-hydraulic pump assembly according to any one of claims 1 to 17; And, there are a first hydraulically adjustable shock absorber and a second hydraulically adjustable shock absorber respectively hydraulically connected to the corresponding hydraulic pump; the first hydraulically adjustable shock absorber and the second hydraulically adjustable shock absorber are assigned to a common chassis axle, or the first hydraulically adjustable shock absorber and the second hydraulically adjustable shock absorber are arranged on a common chassis axle.

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