Electric hydraulic pump, active hydraulic suspension and automobile

Abstract

The utility model relates to the technical field of vehicles, and provides an electric hydraulic pump, an active hydraulic suspension and an automobile. The electric hydraulic pump comprises a pump assembly, a motor assembly and a control assembly. The motor assembly is provided with a motor shaft. The motor assembly is located on one side of the pump assembly in the axial direction of the motor shaft, and the motor shaft is in transmission connection with the pump assembly. The control assembly comprises a first electronic unit and a second electronic unit, the first electronic unit and the second electronic unit are both electrically connected with the motor assembly, the first electronic unit is arranged at the end, away from the pump assembly, of the motor assembly in the axial direction, and the second electronic unit is arranged on the peripheral side of the motor assembly in the radial direction of the motor shaft. The second electronic unit is provided with a capacitor element. According to the electric hydraulic pump, the size in the axial direction of the motor shaft can be effectively reduced, and then the space utilization rate is increased.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an electro-hydraulic pump, an active hydraulic suspension, and an automobile. Background Technology

[0002] An electro-hydraulic pump, as a device that actively provides hydraulic energy to shock absorbers, along with shock absorbers and solenoid valves, constitutes the three key components of an active hydraulic suspension system. Each wheel requires an independent electro-hydraulic pump.

[0003] In related technologies, electric hydraulic pumps mainly consist of a hydraulic pump, a motor, and a motor controller, all arranged axially along the motor shaft. However, because the motor controller needs to integrate many circuit components, and some electronic components are relatively large, the size of the electric hydraulic pump is relatively large. Utility Model Content

[0004] Therefore, it is necessary to provide an electric hydraulic pump that not only reduces the axial dimension of the motor assembly but also improves the space utilization of the outer periphery of the motor assembly.

[0005] An electric hydraulic pump includes a pump assembly, a motor assembly, and a control assembly: the motor assembly has a motor shaft, and along the axial direction of the motor shaft, the motor assembly is located on one side of the pump assembly, and the motor shaft is drively connected to the pump assembly; the control assembly includes a first electronic unit and a second electronic unit, the first electronic unit being electrically connected to the second electronic unit and the motor assembly, the first electronic unit being disposed along the axial direction at one end of the motor assembly opposite to the pump assembly, and the second electronic unit being disposed radially along the motor shaft on the outer periphery of the motor assembly, the second electronic unit having a capacitor element.

[0006] In other words, configuring the control assembly into a first electronic unit and a second electronic unit is equivalent to distributing the control assembly, with the first electronic unit installed at the end of the motor assembly and the second electronic unit installed on the outer periphery of the motor assembly. This arrangement, on the one hand, improves the space utilization of the outer periphery of the electric hydraulic pump, and on the other hand, reduces the number of electronic components in the control assembly at the end of the motor assembly, thereby reducing the radial dimension of the first electronic unit located at the end along the motor axis. Furthermore, because the second electronic unit, which contains capacitors, is installed on the outer periphery of the motor assembly, the axial space occupied by the first electronic unit at the end of the motor assembly is reduced. Therefore, the electric hydraulic pump provided in this application not only reduces the axial dimension of the motor assembly and the radial dimension of the first electronic unit along the motor axis, but also improves the space utilization of the outer periphery of the motor assembly.

[0007] In some embodiments, the motor assembly includes an assembly housing and a motor body. The assembly housing surrounds an assembly cavity, and the motor body is disposed in the assembly cavity. The motor body has a motor shaft. The assembly housing has a first mounting portion at one end away from the motor shaft, and a second mounting portion on the outer periphery of the assembly housing. The first electronic unit is disposed in the first mounting portion, and the second electronic unit is disposed in the second mounting portion.

[0008] In other words, the assembly cavity formed by the assembly shell is used to meet the assembly of the motor body, which is conducive to the connection of the motor body with other structures through the assembly shell; and, by using the first mounting part and the second mounting part, the integrated assembly of the control assembly relative to the motor assembly can be realized.

[0009] In some embodiments, the electro-hydraulic pump further includes a control housing connected to the outer periphery of the assembly housing, and together with the assembly housing, forming an accommodating space for housing the second electronic unit. That is, the control housing and the assembly housing cooperate to achieve protection and assembly of the second electronic unit.

[0010] In some embodiments, the control housing has a recessed portion on a side radially away from the assembly housing along the motor shaft, the recessed portion being disposed away from the capacitor element; the control housing has an assembly hole located in the recessed portion, and the control assembly further includes a connecting connector that passes through the assembly hole and is electrically connected to the capacitor element.

[0011] This design reduces the space occupied by the control housing along the motor axis, facilitating the integration of other structures in the radial direction of the electric hydraulic pump. Furthermore, it ensures reliable assembly of the capacitor components. The recessed area also facilitates the assembly of connecting connectors, thereby connecting the capacitor components in the second electronic unit to an external power source.

[0012] In some embodiments, the first mounting portion has a first receiving space, and the first electronic unit is disposed in the first receiving space; and / or, the second mounting portion has a second receiving space, and the second electronic unit is disposed in the second receiving space.

[0013] In other words, the arrangement of the first and second accommodating spaces facilitates the accommodation of electronic components in the first and second electronic units, thereby reducing radial and axial dimensions.

[0014] In some embodiments, there are two pump assemblies and two motor assemblies, the motor shafts of the two motor assemblies are parallel, the two motor shaft assemblies are arranged along the axial direction of one motor shaft, and the two motor assemblies are located between the two pump assemblies along the axial direction of the motor shaft; there are two first electronic units and two second electronic units, the two first electronic units are electrically connected and located between the two motor assemblies, and the two second electronic units are located on the first side of their respective corresponding motor assemblies.

[0015] This configuration makes full use of the space between the two motor assemblies and the space on the outer periphery of each motor assembly, reducing the axial dimensions while satisfying the requirements for integrated assembly of the two motor assemblies.

[0016] In some embodiments, the control assembly further includes a third electronic unit, which is stacked with two first electronic units along the axial direction of the motor shaft, and the third electronic unit is disposed between the two first electronic units. The third electronic unit is electrically connected to both the first electronic unit and the second electronic unit.

[0017] In other words, by using the third electronic unit, another part of the electronic components can be separated out to further reduce the number of electronic components in the first and second electronic units, thereby reducing the size of the first and second electronic units.

[0018] In some embodiments, the first electronic unit includes a first substrate and a driving electronic component disposed on the first substrate; the third electronic unit includes a third substrate and a main control electronic component disposed on the third substrate; the driving electronic component and the main control electronic component are arranged in a staggered manner.

[0019] This arrangement allows for the distribution of larger electronic components, further reducing the space occupied by the first and third electronic units along the motor shaft, thereby reducing the axial dimension.

[0020] In some embodiments, the main control electronic components are provided on both sides of the third substrate along the axial direction of the motor assembly. This allows for full utilization of the space on both sides of the third substrate in the thickness direction, thereby reducing the dimensions along the motor axis and improving structural compactness.

[0021] In some embodiments, the drive electronic components are provided on both sides of the first substrate along the axial direction of the motor assembly. This allows for full utilization of the space on both sides of the first substrate in the thickness direction, thereby reducing the dimensions along the motor axis and improving structural compactness.

[0022] In some embodiments, the control assembly further includes a shielding layer disposed between the first electronic unit and the third electronic unit.

[0023] The physical barrier provided by the shielding layer can prevent direct contact between high-voltage and low-voltage circuits, reducing the risk of accidental short circuits. Furthermore, it can protect the main control electronic components of the main control circuit from damage caused by the high voltage and high current of the drive circuit, reduce electromagnetic interference, and thus improve the stability and reliability of signal transmission.

[0024] In some embodiments, the electro-hydraulic pump further includes a control housing connected to the motor assembly and enclosing a space for accommodating the second electronic unit.

[0025] In some embodiments, there are two control housings, each of the motor assemblies and a corresponding control housing together enclosing a space for the second electronic unit, and both control housings are located on the first side of the motor assembly along the radial direction of the motor shaft.

[0026] This setup not only reduces the radial dimension but also ensures that the two second electronic units do not interfere with each other.

[0027] In some embodiments, the control housing is provided such that the control housing and the two motor assemblies together enclose a space for accommodating the two second electronic units. That is, the two second electronic units share a single control housing, simplifying the structure and facilitating assembly.

[0028] In some embodiments, the control housing has a recessed portion on the side of the motor assembly that is radially away from the motor shaft, the recessed portion being disposed away from the capacitor element, the control housing having an assembly hole located in the recessed portion, and the control assembly further including a connecting connector that passes through the assembly hole and is electrically connected to the capacitor element.

[0029] In some embodiments, the first electronic unit includes a first substrate and a driving circuit and a main control circuit disposed on the first substrate. The driving circuit is electrically connected to the motor assembly, and the main control circuit is electrically connected to the driving circuit. The second electronic unit further includes a second substrate and a power supply circuit disposed on the second substrate. The capacitor element is disposed on the second substrate and electrically connected to the power supply circuit, and the power supply circuit is electrically connected to the driving circuit. Both the first substrate and the second substrate are connected to the motor assembly.

[0030] In other words, the main control circuit can issue commands to the drive circuit, thereby controlling the operation of the motor assembly using the drive circuit, while the power supply circuit is used to connect to an external power source. Both the first and second substrates are used for physical connection with the motor assembly to achieve integration.

[0031] This application also provides an active hydraulic suspension, including a shock absorber and the aforementioned electro-hydraulic pump, wherein the electro-hydraulic pump is in fluid communication with the shock absorber.

[0032] This application also provides a vehicle including the aforementioned active hydraulic suspension. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 An exploded view of an electric hydraulic pump provided in an embodiment of this application;

[0035] Figure 2 A schematic diagram of the motor assembly in an electric hydraulic pump provided in an embodiment of this application;

[0036] Figure 3 A schematic diagram of the housing assembly in an electric hydraulic pump provided in an embodiment of this application;

[0037] Figure 4 A schematic diagram of the control housing in an electric hydraulic pump provided in an embodiment of this application;

[0038] Figure 5 An exploded view of an electric hydraulic pump provided in another embodiment of this application;

[0039] Figure 6 An exploded view of an electric hydraulic pump provided in yet another embodiment of this application;

[0040] Figure 7 An exploded view of an electric hydraulic pump provided in yet another embodiment of this application;

[0041] Figure 8 This is a schematic diagram of an electric hydraulic pump provided in one embodiment of this application.

[0042] Reference numerals: 110, Pump assembly; 110a, First pump assembly; 110b, Second pump assembly; 120, Motor assembly; 120a, First motor assembly; 120b, Second motor assembly; 121, First mounting part; 122, Second mounting part; 123, Assembly housing; 124, Motor body; 125, Motor shaft; 130, Control assembly; 131, First electronic unit; 132, Second electronic unit; 133, Third electronic unit ; 134. Control housing; 135. Connecting joint; 136. Shielding layer; 1230. Assembly cavity; 1231. Cylindrical part; 1232. Outer baffle; 1233. Rear end plate; 1234. Front end plate; 1235. Mounting post; 1311. First substrate; 1321. Second substrate; 1322. Capacitor element; 1331. Third substrate; 1340. Cavity; 1341. Recessed part; 1342. Flanged edge; 1343. Assembly hole. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] It should be noted that when a component is referred to as being "fixed to" or "attached to" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "upper," "lower," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, the terms "above" and "below" of the first feature and the second feature can refer to the first feature being in direct contact with the second feature, or the first feature and the second feature being in indirect contact through an intermediate medium.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0048] In related technologies, electric hydraulic pumps mainly consist of a hydraulic pump, a motor, and a motor controller, all arranged axially along the motor shaft. The motor controller needs to integrate numerous circuit components to control the motor's operation. Taking capacitors as an example, capacitors primarily generate a rotating magnetic field by providing an additional phase difference, ensuring smooth motor startup and stable operation. Furthermore, capacitors can also be used for short-term energy storage and buffering. Therefore, capacitors are typically large to meet the high capacity, high power, and high voltage requirements of motor startup and operation. This results in capacitors requiring significant assembly space. If the motor controller is installed at the end of the motor, the axial dimension of the electric hydraulic pump along the motor shaft will increase significantly, hindering assembly. Moreover, this large overall axial dimension makes it difficult to integrate other structures along the axial direction of the electric hydraulic pump, reducing space utilization.

[0049] To address this, one embodiment of this application provides an electric hydraulic pump that can effectively reduce the axial dimension along the motor shaft, facilitating the integration of other structures along the axial direction and thereby improving space utilization. The electric hydraulic pump is described in detail below.

[0050] Please see Figure 1 and Figure 2 For example, the electro-hydraulic pump includes a pump assembly 110, a motor assembly 120, and a control assembly 130. The motor assembly 120 has a motor shaft 125. Along the axial direction of the motor shaft 125, the motor assembly 120 is located on one side of the pump assembly 110 and is drively connected to it. The control assembly 130 includes a first electronic unit 131 and a second electronic unit 132, both electrically connected to the motor assembly 120. The first electronic unit 131 is axially located at the end of the motor assembly 120 opposite to the pump assembly 110, and the second electronic unit 132 is radially located on the outer periphery of the motor assembly 120 along the motor shaft 125. The second electronic unit 132 includes a capacitor element 1322.

[0051] Understandably, dividing the control assembly 130 into a first electronic unit 131 and a second electronic unit 132 is equivalent to modularly distributing the electronic components within the control assembly 130. The first electronic unit 131 and the second electronic unit 132 can be respectively located at the end and outer periphery of the motor assembly 120. This arrangement, on the one hand, improves the space utilization of the outer periphery of the electric hydraulic pump by placing the second electronic unit 132 on the outer periphery of the motor assembly 120; on the other hand, it reduces the number of electronic components at the end of the control assembly 130 of the motor assembly 120, thereby reducing the radial dimension of the first electronic unit 131 at the end along the motor shaft 125. Furthermore, by mounting the second electronic unit 132, which includes a capacitor element 1322, on the outer periphery of the motor assembly 120, not only is the space on the outer periphery of the motor assembly 120 fully utilized, but the axial space occupied by the control assembly 130 along the motor shaft 125 is also reduced, thereby reducing the overall axial dimension of the electric hydraulic pump and facilitating the integration of other structures along the axial direction.

[0052] The first electronic unit 131 and the second electronic unit 132 both include a substrate and electronic components disposed on the substrate. Each electronic component is electrically connected to form a circuit for connection with the motor assembly 120.

[0053] In related technologies, all electronic components are typically integrated onto a single substrate and mounted on the motor assembly 120 at one end of the motor shaft 125 away from the pump assembly 110. This results in an excessively large overall size of the substrate, particularly its radial dimension along the motor shaft 125, which affects the overall radial dimension of the electric hydraulic pump. Therefore, in one embodiment of this application, the separate placement of the first electronic unit 131 and the second electronic unit 132 effectively distributes the electronic components across two substrates. This reduces the number of integrated electronic components on each substrate, and consequently, the size of the substrate is also reduced. In particular, the radial dimension of the substrate corresponding to the first electronic unit 131 is significantly reduced, and for the second electronic unit 132, it is only necessary to meet the assembly dimensions of the capacitor element 1322 along the radial direction of the motor shaft 125. This further reduces the space occupied by the control assembly 130 in the radial direction of the motor shaft 125, thereby reducing the overall radial dimension of the electric hydraulic pump.

[0054] In some specific embodiments, taking the cross-section of the motor assembly 120 as a square as an example, the motor assembly 120 has four sides, and the aforementioned second electronic unit 132 can be located on any one of the sides. Here, "square" refers to a shape similar to a square or a shape with square characteristics.

[0055] In another specific case, multiple capacitor elements 1322 are provided and arranged in an array.

[0056] Please see Figures 1 to 3 In some embodiments, the motor assembly 120 includes an assembly housing 123 and a motor body 124. The assembly housing 123 encloses an assembly cavity 1230, and the motor body 124 is disposed within the assembly cavity 1230. The motor body 124 has a motor shaft 125, which is connected to the pump assembly 110. That is, the assembly cavity 1230 enclosed by the assembly housing 123 accommodates the assembly of the motor body 124, providing protection for the motor body 124 and facilitating its connection to other structures via the assembly housing 123. For example, when the electric hydraulic pump needs to be mounted on the suspension body, it is fixed to the suspension body using the assembly housing 123. One end of the motor shaft 125 extends out of the assembly cavity 1230 and connects to the pump assembly 110, thereby driving the pump assembly 110 to operate. The pump assembly 110 includes a pump shaft and a transmission component connected to the pump shaft. The motor shaft 125 can be connected to the pump shaft via a coupling to drive the transmission component. Pump assembly 110 can be a gear pump, screw pump, etc., which are only examples here.

[0057] In some embodiments, the assembly housing 123 has a first mounting portion 121 at one end opposite to the motor shaft 125, and a second mounting portion 122 on the outer periphery of the assembly housing 123. A first electronic unit 131 is disposed in the first mounting portion 121, and a second electronic unit 132 is disposed in the second mounting portion 122. That is, by utilizing the first mounting portion 121 and the second mounting portion 122, the integrated assembly of the control assembly 130 relative to the motor assembly 120 is achieved. Both the first mounting portion 121 and the second mounting portion 122 can be integrally formed with the assembly housing 123 or separately formed from it, as long as they can satisfy the assembly requirements of the first electronic unit 131 and the second electronic unit 132.

[0058] Please see Figures 1 to 4 In some embodiments, the electric hydraulic pump further includes a control housing 134, which is located on the outer periphery of the assembly housing 123 and together with the assembly housing 123 forms a space for accommodating the second electronic unit 132. That is, the control housing 134 cooperates with the assembly housing 123 to achieve protection and assembly of the second electronic unit 132. The control housing 134 and the assembly housing 123 can be detachably connected using screws, snap-fit ​​connections, welding, or bonding, as long as a reliable connection and tight fit between the assembly housing 123 and the control housing 134 are achieved. A sealing ring is also provided between the assembly housing 123 and the control housing 134 to ensure the airtightness of the accommodating space.

[0059] In some embodiments, the second electronic unit 132 may be connected to the side of the control housing 134 facing the receiving space by screws, or it may be connected to the second mounting part 122 of the assembly housing 123 by screws, or the second electronic unit 132 may be connected to both the control housing 134 and the second mounting part 122 to improve assembly reliability.

[0060] The accommodating space does not interfere with the aforementioned assembly cavity 1230, thereby ensuring that the second electronic unit 132 and the motor body 124 do not interfere with each other. A buffer layer may be provided at the second mounting portion 122 to reduce vibrations transmitted to the second electronic unit 132 when the motor body 124 is operating.

[0061] In some specific embodiments, the control housing 134 is provided with a cavity 1340 for accommodating the capacitor element 1322. Specifically, the cavity 1340 has an opening on the side facing the assembly housing 123, and the edge of the opening is connected to the assembly housing 123 to realize the connection between the control housing 134 and the assembly housing 123, thereby using the cavity 1340 and the assembly housing 123 to form the aforementioned accommodating space. The cavity 1340 can better accommodate the capacitor element 1322 and other electronic components in the second electronic unit 132, and can also ensure that the assembly housing 123 has more space for assembling the motor body 124, thereby keeping the radial dimension of the assembly housing 123 from being too large.

[0062] The control housing 134 has a flange 1342 at the edge of its opening. The flange 1342 is pressed against the assembly housing 123 to achieve assembly. The flange 1342 increases the mating area of ​​the control housing 134, which not only facilitates assembly but also improves assembly reliability.

[0063] like Figure 4 and Figure 5 As shown, in some embodiments, the control housing 134 has a recess 1341 on the side of the motor shaft 125 facing away from the mounting housing 123, and the recess 1341 is positioned to avoid the capacitor element 1322. This arrangement reduces the space occupied by the control housing 134 in the radial direction of the motor shaft 125, which facilitates the integration of other structures in the radial direction of the electric hydraulic pump; on the other hand, it ensures the reliable assembly of the capacitor element 1322. The portion of the cavity 1340 corresponding to the recess 1341 can accommodate electronic components smaller than the capacitor element 1322.

[0064] like Figure 4 and Figure 5As shown, in some embodiments, the control housing 134 is provided with a mounting hole 1343 located in the recess 1341. The control assembly 130 also includes a connector 135 passing through the mounting hole 1343 and electrically connected to the capacitor element 1322. This arrangement further improves space utilization by freeing up space smaller than the capacitor element 1322 to accommodate at least part of the connector 135.

[0065] Please see Figure 1 and Figure 2 In some embodiments, the first mounting portion 121 is provided with a first receiving space, and the first electronic unit 131 is disposed in the first receiving space. This not only satisfies the integration of the first electronic unit 131 with respect to the mounting housing 123, but also utilizes the first receiving space to accommodate at least some of the electronic components in the first electronic unit 131, thus providing a protective function. The first receiving space cooperates with the aforementioned cavity 1340 to form a receiving space. The provision of the first receiving space can reduce the size of the cavity 1340, thereby reducing the radial dimension of the control housing 134 along the motor shaft 125.

[0066] In some other embodiments, the second mounting portion 122 is provided with a second receiving space, and the second electronic unit 132 is disposed in the second receiving space. The cooperation between the second receiving space and the second electronic unit 132 is basically similar to the cooperation between the first receiving space and the first electronic unit 131, and therefore will not be described in detail.

[0067] In other embodiments, the first mounting part 121 may be provided with a first accommodating space, and the aforementioned control housing 134 may be in the form of a flat plate structure, sealing the opening of the first accommodating space, thereby enclosing the accommodating space.

[0068] like Figure 2 and Figure 5As shown, in some specific embodiments, the assembly housing 123 includes a cylindrical portion 1231 and a peripheral baffle 1232 surrounding the outer periphery of the cylindrical portion 1231. The cylindrical portion 1231 forms an assembly cavity 1230. The peripheral baffle 1232 is U-shaped. One end of the peripheral baffle 1232 protrudes from the cylindrical portion 1231 along the axial direction of the motor shaft 125 to form a first receiving space; and the peripheral baffle 1232 protrudes radially from the cylindrical portion 1231 at the opening of the U-shape along the motor shaft 125 to form a second receiving space. That is, the first mounting portion 121 and the second mounting portion 122 are both integrally formed on the assembly housing 123. The flange 1342 of the aforementioned control housing 134 is pressed against the peripheral baffle 1232 and fixed to the peripheral baffle 1232. The outer baffle 1232 may have a protruding mounting post 1235, or the outer wall of the cylindrical part 1231 may have a protruding mounting post 1235, which facilitates connection with the flange 1342 of the control housing 134; and the mounting post 1235 may also be connected to the second electronic unit 132.

[0069] like Figure 1 As shown, in some embodiments, the assembly housing 123 further includes a rear end plate 1233, which is connected to one end of the peripheral baffle 1232 axially away from the pump assembly 110 along the motor shaft 125. The space between the rear end plate 1233 and the cylindrical portion 1231 serves as a first receiving space, with the opening of the first receiving space located on one side of the assembly housing 123 radially along the motor shaft 125. The first electronic unit 131 can be inserted into the first receiving space. The control housing 134 seals the opening of the first receiving space to protect the first electronic unit 131.

[0070] The assembly housing 123 also includes a front end plate 1234, which is located at the end of the outer baffle 1232 facing the pump assembly 110.

[0071] In other embodiments, both the first mounting portion 121 and the second mounting portion 122 can be flat and fixed to the end and outer periphery of the assembly housing 123, respectively, and then connected to the first electronic unit 131 and the second electronic unit 132. In this case, the depth of the cavity 1340 of the control housing 134 can be increased accordingly. Simultaneously, a control housing can also be provided at the first mounting portion 121, as long as it can meet the assembly and protection requirements of the first electronic unit 131.

[0072] Please see Figure 1 , Figure 5 and Figure 6In some embodiments, the first electronic unit 131 includes a first substrate 1311 and a driving circuit and a main control circuit disposed on the first substrate 1311. The driving circuit is electrically connected to the motor assembly 120, and the main control circuit is electrically connected to the driving circuit. The main control circuit includes at least a main control chip, which can issue commands to the driving circuit, thereby controlling the operation of the motor assembly 120 using the driving circuit. The first substrate 1311 is used to connect to the aforementioned first mounting portion 121, for example, by screw connection, to realize the assembly of the first electronic unit 131 relative to the motor assembly 120. The specific structures of the driving circuit and the main control circuit are existing mature technologies and will not be described in detail here.

[0073] In some embodiments, the second electronic unit 132 further includes a second substrate 1321 and a power supply circuit disposed on the second substrate 1321. A capacitor element 1322 is disposed on the second substrate 1321 and electrically connected to the power supply circuit, which is electrically connected to the drive circuit. The power supply circuit is typically used to connect to an external power source, and is therefore arranged on the outer periphery of the motor assembly 120, providing more space and facilitating connection to an external power source. The second substrate 1321 is screwed to the second mounting portion 122 to achieve the assembly of the second electronic unit 132 relative to the motor assembly 120. The specific structure of the power supply circuit is existing mature technology and will not be described in detail here.

[0074] In some embodiments, both sides of the first substrate 1311 along its thickness direction (i.e., the axial direction of the motor shaft 125) can be used to mount electronic components forming the main control circuit and drive circuit; and both sides of the second substrate 1321 along its thickness direction can also be used to mount electronic components forming the power supply circuit. Capacitor elements 1322 are mounted on the side of the second substrate 1321 facing the control housing 134 along its thickness direction to reduce the space occupied by the mounting housing 123. Alternatively, electronic components may be provided only on both sides of the first substrate 1311 along its thickness direction, or only on both sides of the second substrate 1321 along its thickness direction.

[0075] In practical use, the aforementioned control housing 134 is provided with mounting holes 1343. The control assembly 130 also includes a connecting connector 135, which passes through the mounting hole 1343 and is electrically connected to the capacitor element 1322. The connecting connector 135 is used to connect to an external power source. The connecting connector 135 can be electrically connected to the power supply circuit via a DC copper busbar. The DC copper busbar can be connected to the power supply circuit by welding, crimping, or other methods.

[0076] Please see Figures 5 to 8As another example, both pump assemblies 110 and motor assemblies 120 are provided in pairs. The motor shafts 125 of the two motor assemblies 120 are parallel, and the two motor assemblies 120 are arranged along the axial direction of one motor shaft 125. Along the axial direction of the motor shaft 125, the two motor assemblies 120 are located between the two pump assemblies 110. Both first electronic units 131 and second electronic units 132 are provided in pairs. The two first electronic units 131 are electrically connected and located between the two motor assemblies 120, and the two second electronic units 132 are located on the first side of their respective motor assemblies 120.

[0077] In other words, the two first electronic units 131 are located at opposite ends of the two motor assemblies 120 along the motor shaft 125 and are electrically connected to their respective motor assemblies 120; furthermore, the electrical connection of the two first electronic units 131 facilitates connection to an external power source. Meanwhile, the two second electronic units 132 are located on the outer periphery of their respective motor assemblies 120. Taking a roughly square cross-section of the motor assembly 120 as an example, the first side of the motor assembly 120 can be the side facing upwards in the vertical direction. The simultaneous arrangement of the two second electronic units 132 on the same side further reduces the space occupied radially along the motor shaft 125.

[0078] Therefore, this arrangement makes full use of the space between the two motor assemblies 120 and the space on the outer periphery of each motor assembly 120, reducing the axial dimension while satisfying the integrated assembly of the two motor assemblies 120. In addition, since the two pump assemblies 110 are located at opposite ends of the two motor assemblies 120, it is easier to connect the pump assembly 110 to other structures (such as vibration dampers) through piping.

[0079] In some embodiments, the ends of the two motor assemblies 120 that are close together along the axial direction of the motor shaft 125 are the opposite ends, and the ends that are far apart along the axial direction of the motor shaft 125 are the opposite ends.

[0080] In some embodiments, a pump assembly 110 and a motor assembly 120 correspond to a hydraulic drive group. Therefore, this embodiment has two hydraulic drive groups: a first hydraulic drive group and a second hydraulic drive group. The first hydraulic drive group corresponds to the first pump assembly 110a and the first motor assembly 120a. The second hydraulic drive group corresponds to the second pump assembly 110b and the second motor assembly 120b. The mounting housings 123 corresponding to the first motor assembly 120a and the second motor assembly 120b each have a rear end plate 1233 on their opposite sides, and are connected by the rear end plates 1233 to achieve integrated assembly of the two hydraulic drive groups. Furthermore, the rear end plates 1233 ensure that the mounting housings 123 of each motor assembly 120 are independent, thus ensuring that the two hydraulic drive groups are independently configured. In this case, the connecting joints 135 can be connected in parallel to the power circuits in both second electronic units 132.

[0081] like Figure 7 As shown, in some embodiments, both the first motor assembly 120a and the second motor assembly 120b are provided with control housings 134, that is, there are two control housings 134. Each motor assembly 120 and its corresponding control housing 134 together enclose a space for a second electronic unit 132. Along the radial direction of the motor shaft 125, both control housings 134 are located on the first side of the motor assembly 120.

[0082] In other words, the two control housings 134 are connected to their respective mounting housings 123 to enclose a housing space. Furthermore, the two control housings 134 are arranged on the same radial side of the motor assembly 120 along the motor shaft 125, which means the two second electronic units 132 are also arranged on the same side, satisfying the requirement of radial dimension reduction. Each control housing 134 is connected to a corresponding connector 135, and each connector 135 is electrically connected to a corresponding power circuit. Moreover, this arrangement ensures that the two second electronic units 132 do not interfere with each other. When one second electronic unit 132 is repaired or replaced, the other second electronic unit 132 is not affected, improving safety.

[0083] In some embodiments, each control housing 134 is provided with a recess 1341 that avoids the corresponding capacitor element 1322, and an assembly hole 1343 is provided in the recess 1341 to facilitate the assembly of the connector 135.

[0084] Of course, in other embodiments, the first motor assembly 120a and the second motor assembly 120b may share a single control housing 134. That is, the control housing 134 is provided such that it, together with the two motor assemblies 120, encloses a space for accommodating the two second electronic units 132. In this case, the control housing 134 is relatively long, spanning the two second mounting portions 122, to protect the two second electronic units 132. The control housing 134 may have a recess 1341, with a connecting connector 135 passing through a mounting hole 1343 in the recess 1341, connected in parallel with the two first electronic units 131.

[0085] Alternatively, the control housing 134 may also have two recesses 1341, with each first electronic unit 131 corresponding to one recess 1341 and one mounting hole 1343. Two connecting connectors 135 are provided, each passing through its corresponding mounting hole 1343, and connected to the corresponding first electronic unit 131.

[0086] like Figure 5 and Figure 6As shown, in some other embodiments, the mounting housings 123 corresponding to the first motor assembly 120a and the second motor assembly 120b respectively do not include rear end plates. In this case, one end of each of the two first receiving spaces along the axial direction of the motor shaft 125 is open, and the two mounting housings 123 are fixed at the open end, for example, by welding, bonding, or snap-fit. In this case, the first motor assembly 120a and the second motor assembly 120b share a single control housing 134, which provides protection for the two first electronic units 131 and the two second electronic units 132.

[0087] like Figure 6 As shown, in some embodiments, the control assembly 130 further includes a third electronic unit 133. Along the axial direction of the motor shaft 125, the third electronic unit 133 and two first electronic units 131 are stacked, with the third electronic unit 133 positioned between the two first electronic units 131. The third electronic unit 133 is electrically connected to both the first electronic units 131 and the second electronic units 132. That is, by utilizing the third electronic unit 133, another portion of the electronic components can be separated, further reducing the number of electronic components on the first substrate 1311 and the second substrate 1321, thereby reducing the size of the first substrate 1311 and the second substrate 1321. Specifically, the third electronic unit 133 includes a third substrate 1331 and a main control electronic component disposed on the third substrate 1331, the main control electronic component defining a main control circuit. The first electronic unit 131 includes a first substrate 1311 and a driving electronic component disposed on the first substrate 1311, the driving electronic component defining a driving circuit. At this time, the first motor assembly 120a and the second motor assembly 120b share the main control circuit of the third electronic unit 133, further reducing the axial dimension.

[0088] In other words, the main control circuit and the drive circuit can be located on the third substrate 1331 and the first substrate 1311 respectively. Since the drive circuit is usually a high-voltage circuit, while the main control circuit is usually a low-voltage circuit, this arrangement is equivalent to isolating the high-voltage circuit and the low-voltage circuit, thereby reducing the impact of noise and interference signals in the high-voltage circuit on the low-voltage circuit and improving the stability and anti-interference capability of the drive circuit and the main control circuit.

[0089] like Figure 6As shown, in some embodiments, the control assembly 130 further includes a shielding layer 136 disposed between the first electronic unit 131 and the third electronic unit 133. That is, the shielding layer 136 can physically isolate the aforementioned high-voltage and low-voltage circuits, reducing interference. It is understood that because the third electronic unit 133 and the two first electronic units 131 are stacked along the axial direction of the motor shaft 125, the safety distance between each first electronic unit 131 and the third electronic unit 133 is insufficient to maintain a compact arrangement with a small axial dimension, causing the high-voltage circuit in the drive circuit to affect the signal quality of the main control circuit. Therefore, the physical barrier provided by the shielding layer 136 can prevent direct contact between the high-voltage and low-voltage circuits, reducing the risk of external short circuits; and it can protect the main control electronic components of the main control circuit from damage caused by the high voltage and high current of the drive circuit, reducing electromagnetic interference, thereby improving the stability and reliability of signal transmission.

[0090] The shielding layer 136 can be an electrical isolation plate, made of anti-static plastic or similar materials, to reduce the generation and accumulation of static electricity. Low-voltage electronic components such as sensors can also be integrated onto the third substrate 1331.

[0091] In some embodiments, each motor assembly 120 may correspond to one third electronic unit 133. Two third electronic units 133 are stacked between two first electronic units 131. Each third electronic unit 133 and its corresponding first electronic unit 131 are jointly installed in a corresponding first receiving space.

[0092] like Figure 6 As shown, in some embodiments, the driving electronic components on the first substrate 1311 and the main control electronic components on the third substrate 1331 are arranged in a staggered manner. This arrangement can disperse the larger electronic components, further reducing the space occupied by the first electronic unit 131 and the third electronic unit 133 along the motor shaft 125, thereby reducing the axial dimension. For example, when the driving electronic components with larger axial dimensions on the first substrate 1311 are arranged at a lower position and the smaller ones are arranged at a higher position, then the main control electronic components with larger axial dimensions on the third substrate 1331 are arranged at a higher position and the smaller ones are arranged at a lower position.

[0093] In some other embodiments, the third substrate 1331 has main control electronic components on both sides along the axial direction of the motor shaft 125, and the first substrate 1311 has drive electronic components on both sides along the axial direction of the motor shaft 125. This arrangement can fully utilize the space on both sides of the first substrate 1311 and the third substrate 1331 in the thickness direction, thereby reducing the radial dimension along the motor shaft 125. Alternatively, the main control electronic components can be located on both sides of the third substrate 1331, and the drive electronic components can be located on the side of the first substrate 1311 opposite to the third substrate 1331 along the axial direction of the motor shaft 125. This is only an example.

[0094] Another embodiment of this application provides an active hydraulic suspension, including a shock absorber and the aforementioned electro-hydraulic pump, the electro-hydraulic pump being in fluid communication with the shock absorber. The electro-hydraulic pump provides active damping control for the shock absorber, improving the damping effect of the active hydraulic suspension. The active hydraulic suspension also includes a suspension body, to which both the aforementioned electro-hydraulic pump and shock absorber are connected.

[0095] Another embodiment of this application provides a car including the aforementioned active hydraulic suspension. The wheels are connected to the active hydraulic suspension via wheel hubs, and the active hydraulic suspension is connected to the vehicle body to provide support for the wheels and the vehicle body, thereby cooperating with other structures to achieve wheel trajectory control. The active hydraulic suspension can reduce the impact transmitted to the wheels due to road bumps during vehicle operation, thereby improving the stability and comfort of the vehicle while driving.

[0096] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. An electro-hydraulic pump characterized by, The electric hydraulic pump comprises: a pump assembly; a motor assembly provided with a motor shaft, the motor assembly being located on one side of the pump assembly along the axial direction of the motor shaft, the motor shaft being in driving connection with the pump assembly; a control assembly comprising a first electronic unit and a second electronic unit, the first electronic unit being in electrical connection with the second electronic unit and the motor assembly, the first electronic unit being arranged at the end of the motor assembly away from the pump assembly along the axial direction, the second electronic unit being arranged at the outer circumferential side of the motor assembly along the radial direction of the motor shaft, the second electronic unit being provided with a capacitor element.

2. The electro-hydraulic pump of claim 1, wherein, The motor assembly comprises an assembly shell and a motor body, the assembly shell being provided with an assembly cavity, the motor body being arranged in the assembly cavity, the motor body being provided with the motor shaft; wherein the end of the assembly shell away from the motor shaft is provided with a first mounting portion, the outer circumferential side of the assembly shell is provided with a second mounting portion, the first electronic unit is arranged in the first mounting portion, and the second electronic unit is arranged in the second mounting portion.

3. The electro-hydraulic pump of claim 2, wherein, The electric hydraulic pump further comprises a control shell connected to the outer circumferential side of the assembly shell, the control shell being provided with a recessed cavity for accommodating the capacitor element.

4. The electro-hydraulic pump of claim 3, wherein, The control shell is provided with a recessed portion on the side away from the assembly shell along the radial direction of the motor shaft, the recessed portion avoiding the arrangement of the capacitor element; the control shell is provided with an assembly hole located in the recessed portion, the control assembly further comprises a connecting joint, the connecting joint being arranged in the assembly hole and being in electrical connection with the capacitor element.

5. The electro-hydraulic pump of claim 2, wherein, The first mounting portion is provided with a first accommodating space, and the first electronic unit is arranged in the first accommodating space; and / or the second mounting portion is provided with a second accommodating space, and the second electronic unit is arranged in the second accommodating space.

6. The electro-hydraulic pump of claim 1, wherein, The pump assembly and the motor assembly are both provided with two, the motor shafts of the two motor assemblies are parallel, the two motor assemblies are arranged along the axial direction of one of the motor shafts, and the two motor assemblies are located between the two pump assemblies along the axial direction of the motor shafts; The first electronic unit and the second electronic unit are both provided with two, the two first electronic units are in electrical connection and located between the two motor assemblies, and the two second electronic units are located on the first side of the corresponding motor assembly.

7. The electro-hydraulic pump of claim 6, wherein, The control assembly further comprises a third electronic unit, the third electronic unit and the two first electronic units are arranged in a stack along the axial direction of the motor shaft, the third electronic unit is arranged between the two first electronic units, and the third electronic unit is in electrical connection with the first electronic unit and the second electronic unit.

8. The electro-hydraulic pump of claim 7, wherein, The first electronic unit comprises a first substrate and a driving electronic element arranged on the first substrate; The third electronic unit comprises a third substrate and a master control electronic element arranged on the third substrate; The driving electronic element and the master control electronic element are arranged in a staggered manner.

9. The electro-hydraulic pump of claim 8, wherein, At least one of the following is met: the master control electronic element is arranged on both sides of the third substrate along the axial direction of the motor assembly; The first substrate is provided with the driving electronic element on both sides of the motor assembly along the axial direction. The control assembly further comprises a shielding layer, which is arranged between the first electronic unit and the third electronic unit.

10. The electro-hydraulic pump of claim 6, wherein, The electro-hydraulic pump further comprises a control housing, which is connected with the motor assembly and surrounds the motor assembly to form a space for accommodating the second electronic unit. The control housing is provided with two, and each of the motor assemblies is surrounded by a corresponding control housing to form a space for accommodating a second electronic unit along the radial direction of the motor shaft. The control housing is provided with one, and one control housing surrounds two motor assemblies to form a space for accommodating two second electronic units. The control housing is provided with a recess on the side away from the motor assembly along the radial direction of the motor shaft, which avoids the arrangement of the capacitor element.

11. The electro-hydraulic pump according to any one of claims 1 to 6, characterized in that The first electronic unit comprises a first substrate, a driving circuit and a master control circuit arranged on the first substrate, the driving circuit is electrically connected with the motor assembly, and the master control circuit is electrically connected with the driving circuit. The second electronic unit further comprises a second substrate and a power supply circuit arranged on the second substrate, the capacitor element is arranged on the second substrate and electrically connected with the power supply circuit, and the power supply circuit is electrically connected with the driving circuit. The first substrate and the second substrate are connected with the motor assembly.

12. An active hydraulic suspension, characterized by The active hydraulic suspension comprises: a shock absorber; The electro-hydraulic pump of any one of claims 1 to 11 is in fluid communication with the shock absorber.

13. An automobile characterized by comprising: The automobile comprises the active hydraulic suspension of claim 12.

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