Electric hydraulic pump, active hydraulic suspension and automobile

Abstract

The invention 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] The present application relates to the field of vehicle technology, and in particular to an electric hydraulic pump, an active hydraulic suspension and a car. Background Art

[0002] As a device that actively provides hydraulic energy to the shock absorber, the electric hydraulic pump, shock absorber, solenoid valve, etc. constitute the three key components of the active hydraulic suspension system. Each wheel requires an independent electric hydraulic pump.

[0003] In the related art, the electric hydraulic pump is mainly composed of a hydraulic pump, a motor and a motor controller, and the three are arranged along the axial direction of the motor shaft. However, since the motor controller needs to integrate more circuit components and some electronic components are large in size, the electric hydraulic pump is large in size. Summary of the invention

[0004] Based on this, it is necessary to provide an electric hydraulic pump that not only reduces the size of the motor assembly along the axial direction, but also improves the space utilization of the periphery of the motor assembly.

[0005] An electric hydraulic pump comprises a pump assembly, a motor assembly and a control assembly: the motor assembly is provided with 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 drivingly connected to the pump assembly; the control assembly comprises a first electronic unit and a second electronic unit, the first electronic unit is electrically connected to the second electronic unit and the motor assembly, the first electronic unit is arranged at one end of the motor assembly away from the pump assembly along the axial direction, the second electronic unit is arranged at the outer peripheral side of the motor assembly along the radial direction of the motor shaft, and the second electronic unit is provided with a capacitor element.

[0006] That is to say, setting the control assembly to be composed of a first electronic unit and a second electronic unit is equivalent to dispersing the control assembly, with the first electronic unit installed at the end of the motor assembly and the second electronic unit installed at the outer peripheral side of the motor assembly. Such a setting, on the one hand, is conducive to improving the space utilization rate on the outer peripheral side of the electric hydraulic pump, and on the other hand, it reduces the number of electronic components of the control assembly at the end of the motor assembly, thereby reducing the radial size of the first electronic unit located at the end along the motor shaft. Moreover, it is precisely because the second electronic unit with a capacitor element is installed on the outer peripheral side of the motor assembly that the space occupied by the first electronic unit at the end of the motor assembly along the axial direction is reduced. Therefore, the electric hydraulic pump provided by the present application not only reduces the size along the axial direction of the motor assembly and the size of the first electronic unit along the radial direction of the motor shaft, but also improves the space utilization rate on the outer peripheral side of the motor assembly.

[0007] In some embodiments, the motor assembly includes an assembly shell and a motor body, the assembly shell is surrounded by an assembly cavity, the motor body is disposed in the assembly cavity, and the motor body is provided with the motor shaft; wherein a first mounting portion is provided at one end of the assembly shell facing away from the motor shaft, a second mounting portion is provided on the outer peripheral side of the assembly shell, the first electronic unit is provided on the first mounting portion, and the second electronic unit is provided on the second mounting portion.

[0008] That is to say, the assembly cavity surrounded by the assembly shell is used to meet the assembly requirements of the motor body, which is beneficial for connecting the motor body with other structures through the assembly shell; and the first mounting part and the second mounting part are arranged to achieve integrated assembly of the control assembly relative to the motor assembly.

[0009] In some embodiments, the electric hydraulic pump further includes a control housing, which is connected to the outer peripheral side of the assembly housing and is jointly enclosed with the assembly housing to form an accommodation space for accommodating the second electronic unit. That is, the control housing cooperates with the assembly housing to achieve protection and assembly of the second electronic unit.

[0010] In some embodiments, the control housing is provided with a recessed portion on a side of the motor shaft radially away from the assembly housing, and the recessed portion is arranged away from the capacitor element; the control housing is provided with an assembly hole, and the assembly hole is located in the recessed portion; the control assembly also includes a connecting joint, and the connecting joint is passed through the assembly hole and electrically connected to the capacitor element.

[0011] Such a configuration can, on the one hand, reduce the space occupied by the control housing along the radial direction of the motor shaft, which is also conducive to integrating other structures in the radial direction of the electric hydraulic pump; and, on the other hand, ensure the reliable assembly of the capacitor element. At the same time, the recessed portion is conducive to the assembly of the connection joint, thereby connecting the capacitor element in the second electronic unit to the external power supply.

[0012] In some embodiments, the first installation portion is provided with a first accommodating space, and the first electronic unit is arranged in the first accommodating space; and / or the second installation portion is provided with a second accommodating space, and the second electronic unit is arranged in the second accommodating space.

[0013] That is to say, the provision of the first accommodation space and the second accommodation space is conducive to accommodating the electronic components in the first electronic unit and the second electronic unit, and reducing the radial and axial dimensions.

[0014] In some embodiments, two of the pump assemblies and two of the motor assemblies are provided, the motor shafts of the two motor assemblies are parallel, the two motor shaft 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 shaft; two of the first electronic units and two of the second electronic units are provided, 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 each corresponding motor assembly.

[0015] Such an arrangement fully utilizes the space between the two motor assemblies and the space on the outer peripheral side of each motor assembly, thereby reducing the axial dimension while satisfying the integrated assembly of the two motor assemblies.

[0016] In some embodiments, the control assembly further includes a third electronic unit. The third electronic unit and the two first electronic units are stacked 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 the first electronic unit and the second electronic unit.

[0017] That is to say, by using the third electronic unit, another part of the electronic components can be separated to further reduce the number of electronic components in the first electronic unit and the second electronic unit, thereby reducing the size of the first electronic unit and the second electronic unit.

[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] Such an arrangement can disperse and arrange the electronic components of larger sizes, further reducing the space occupied by the first electronic unit and the third electronic unit along the axial direction of the motor shaft, thereby reducing the axial size.

[0020] In some embodiments, the main control electronic components are disposed on both sides of the third substrate along the axial direction of the motor assembly, so that the space on both sides of the third substrate in the thickness direction can be fully utilized, thereby reducing the radial dimension of the motor shaft and improving the compactness of the structure.

[0021] In some embodiments, the driving electronic components are disposed on both sides of the first substrate along the axial direction of the motor assembly. In this way, the space on both sides of the first substrate in the thickness direction can be fully utilized, thereby reducing the radial dimension of the motor shaft and improving the compactness of the structure.

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

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

[0024] In some embodiments, the electric hydraulic pump further includes a control housing, which is connected to the motor assembly and encloses an accommodation space with the motor assembly for accommodating the second electronic unit.

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

[0026] Such an arrangement 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 with one, and the control housing and the two motor assemblies together enclose a receiving space for receiving the two second electronic units. That is, the two second electronic units share one control housing, which simplifies the structure and facilitates assembly.

[0028] In some embodiments, the control housing is provided with a recessed portion on a side of the motor shaft radially away from the motor assembly, and the recessed portion is arranged to avoid the capacitor element. The control housing is provided with an assembly hole, and the assembly hole is located in the recessed portion. The control assembly also includes a connecting joint, and the connecting joint is passed through the assembly hole and electrically connected to the capacitor element.

[0029] In some embodiments, the first electronic unit includes a first substrate and a drive circuit and a main control circuit disposed on the first substrate, the drive circuit is electrically connected to the motor assembly, and the main control circuit is electrically connected to the drive circuit; the second electronic unit also 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 drive circuit; the first substrate and the second substrate are both connected to the motor assembly.

[0030] That is, the main control circuit can apply instructions to the drive circuit, and then use the drive circuit to control the operation of the motor assembly, and the power supply circuit is used to connect to an external power supply. The first substrate and the second substrate are both used to physically connect to the motor assembly to achieve integration.

[0031] The present application also provides an active hydraulic suspension, comprising a shock absorber and the above-mentioned electric hydraulic pump, wherein the electric hydraulic pump is in fluid communication with the shock absorber.

[0032] The present application also provides a car, comprising the above-mentioned active hydraulic suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

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

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

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

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

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

[0041] Figure 8 A schematic diagram of an electric hydraulic pump provided in accordance with an embodiment of the present application.

[0042] Figure 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 portion; 122, second mounting portion; 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 shell; 135, connecting joint; 136, shielding layer; 1230, assembly cavity; 1231, cylindrical portion; 1232, outer baffle; 1233, rear end plate; 1234, front end plate; 1235, mounting column; 1311, first substrate; 1321, second substrate; 1322, capacitor element; 1331, third substrate; 1340, concave cavity; 1341, recessed portion; 1342, flange; 1343, assembly hole. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0044] It should be noted that when a component is referred to as being "fixed to" or "provided on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "upper", "lower" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present application, unless otherwise clearly specified and limited, a first feature being “on” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium.

[0047] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0048] In the related art, the electric hydraulic pump is mainly composed of a hydraulic pump, a motor and a motor controller, and these three are arranged along the axial direction of the motor shaft. The motor controller needs to integrate more circuit elements to meet the operation control of the motor. Taking the capacitor element as an example, since the capacitor element mainly generates a rotating magnetic field by providing an additional phase difference, it ensures the smooth start and stable operation of the motor; and the capacitor element can also be used for short-term energy storage and buffering. Therefore, the size of the capacitor element is usually set larger to meet the high capacity, high power, and high voltage requirements during motor startup and operation. This results in the capacitor element needing to occupy a larger assembly space during assembly. If the motor controller is installed at the end of the motor, the axial size of the electric hydraulic pump along the motor shaft will be significantly increased, which is not conducive to assembly; and, it is precisely because of this setting that the overall axial size is large, it is difficult to integrate other structures along the axial direction of the electric hydraulic pump, reducing space utilization.

[0049] In view of this, an embodiment of the present application provides an electric hydraulic pump, which can effectively reduce the size along the axial direction of the motor shaft, facilitate the integration of other structures along the axial direction, and thus improve space utilization. The electric hydraulic pump is described in detail below.

[0050] See also Figure 1 and Figure 2 Exemplarily, the electric hydraulic pump includes a pump assembly 110, a motor assembly 120 and a control assembly 130. The motor assembly 120 is provided with 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 transmission-connected to the pump assembly 110. The control assembly 130 includes a first electronic unit 131 and a second electronic unit 132, both of which are electrically connected to the motor assembly 120. The first electronic unit 131 is axially arranged at one end of the motor assembly 120 away from the pump assembly 110, and the second electronic unit 132 is radially arranged at the outer peripheral side of the motor assembly 120 along the motor shaft 125. The second electronic unit 132 is provided with a capacitor element 1322.

[0051] It can be understood that the arrangement of dividing the control assembly 130 into the first electronic unit 131 and the second electronic unit 132 is equivalent to modularly dispersing the electronic components in the control assembly 130, and the first electronic unit 131 and the second electronic unit 132 can be arranged at the end and the outer peripheral side of the motor assembly 120 respectively. Such an arrangement, on the one hand, arranges the second electronic unit 132 at the outer peripheral side of the motor assembly 120, which is conducive to improving the space utilization rate of the outer peripheral side of the electric hydraulic pump, and on the other hand, reduces the number of electronic components of the control assembly 130 at the end of the motor assembly 120, thereby reducing the radial size of the first electronic unit 131 at the end along the motor shaft 125. Moreover, it is precisely because the second electronic unit 132 with the capacitor element 1322 is installed on the outer peripheral side of the motor assembly 120 that not only fully utilizes the space on the outer peripheral side of the motor assembly 120, but also reduces the occupied space of the control assembly 130 in the axial direction of the motor shaft 125, thereby reducing the axial size of the entire electric hydraulic pump, which is conducive to integrating other structures along the axial direction.

[0052] The first electronic unit 131 and the second electronic unit 132 each include a substrate and electronic components disposed on the substrate, and the electronic components are electrically connected to form a circuit for connecting to the motor assembly 120 .

[0053] In the related art, all electronic components are usually integrated on a substrate, and then installed on the end of the motor assembly 120 that is axially away from the pump assembly 110 along the motor shaft 125, which causes the overall size of the substrate to be too large, especially the radial size of the substrate along the motor shaft 125 is large, which in turn affects the overall radial size of the electric hydraulic pump. Therefore, in one embodiment of the present application, it is precisely because of the separation of the first electronic unit 131 and the second electronic unit 132, which is equivalent to dispersing each electronic component on two substrates, that the number of electronic components corresponding to each substrate is reduced, and the size of the substrate is also reduced accordingly. In particular, the radial size of the first electronic unit 131 corresponding to the substrate will be significantly reduced, and for the corresponding second electronic unit 132, it is mainly necessary to meet the assembly size of the capacitor element 1322 along the radial direction of the motor shaft 125. In this way, the occupied space of the control assembly 130 in the radial direction of the motor shaft 125 is further reduced, thereby reducing the overall radial size of the electric hydraulic pump.

[0054] In some specific embodiments, taking the cross section of the motor assembly 120 as a square-like shape, the motor assembly 120 has four sides, and the second electronic unit 132 can be disposed at any side. The square-like shape refers to a shape similar to a square or a shape having square characteristics.

[0055] In another specific embodiment, a plurality of capacitor elements 1322 are provided and arranged in an array.

[0056] See also 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 is surrounded by an assembly cavity 1230, and the motor body 124 is arranged in the assembly cavity 1230. The motor body 124 is provided with a motor shaft 125, and the motor shaft 125 is connected to the pump assembly 110. In other words, the assembly cavity 1230 surrounded by the assembly housing 123 satisfies the assembly of the motor body 124, so as to protect the motor body 124 and facilitate the connection of the motor body 124 with other structures through the assembly housing 123. For example, when the electric hydraulic pump needs to be assembled on the suspension body, the assembly housing 123 is used to fix the suspension body. One end of the motor shaft 125 extends out of the assembly cavity 1230 and is connected to the pump assembly 110, thereby driving the pump assembly 110 to operate. Among them, the pump assembly 110 includes a pump shaft and a transmission component connected to the pump shaft, and the motor shaft 125 can be connected to the pump shaft through a coupling to realize the driving of the transmission component. The pump assembly 110 may be a gear pump, a screw pump, etc., which are only used as examples.

[0057] In some embodiments, a first mounting portion 121 is provided at one end of the assembly housing 123 away from the motor shaft 125, a second mounting portion 122 is provided on the outer peripheral side of the assembly housing 123, a first electronic unit 131 is provided on the first mounting portion 121, and a second electronic unit 132 is provided on the second mounting portion 122. In other words, the first mounting portion 121 and the second mounting portion 122 are used to realize the integrated assembly of the control assembly 130 relative to the motor assembly 120. The first mounting portion 121 and the second mounting portion 122 can be integrally formed with the assembly housing 123, or can be separately formed from the assembly housing 123, as long as they can meet the assembly requirements of the first electronic unit 131 and the second electronic unit 132.

[0058] See also Figures 1 to 4 In some embodiments, the electric hydraulic pump further includes a control housing 134, which is disposed on the outer peripheral side of the assembly housing 123 and is enclosed together with the assembly housing 123 to form an accommodation space for accommodating the second electronic unit 132. In other words, 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 by screws, or by snap fit, or by welding, bonding, etc., as long as the assembly housing 123 and the control housing 134 can be reliably connected and tightly fit. A sealing ring is also provided between the assembly housing 123 and the control housing 134 to ensure the sealing of the accommodation space.

[0059] In some embodiments, the second electronic unit 132 can be connected to the side of the control shell 134 facing the accommodating space by screws, or can be connected to the second mounting portion 122 of the assembly shell 123 by screws, or the second electronic unit 132 can be connected to both the control shell 134 and the second mounting portion 122 to improve assembly reliability.

[0060] The accommodation 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 vibration transmitted to the second electronic unit 132 when the motor body 124 is working.

[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 is provided with an opening on the side facing the assembly housing 123, and the edge of the opening is connected to the assembly housing 123 to achieve the connection between the control housing 134 and the assembly housing 123, and then the cavity 1340 and the assembly housing 123 are used to form the aforementioned accommodation space. The provision of the cavity 1340, on the one hand, can better accommodate the capacitor element 1322 and other electronic components in the second electronic unit 132, and on the other hand, can ensure that the assembly housing 123 has more sufficient space for the motor body 124 to be assembled, thereby maintaining the radial size of the assembly housing 123 not too large.

[0062] The control housing 134 is provided with a flange 1342 at the opening edge, and the flange 1342 is pressed on the assembly housing 123 to achieve assembly. The flange 1342 increases the matching area of ​​the control housing 134, which is not only conducive to assembly, but also improves assembly reliability.

[0063] like Figure 4 and Figure 5 As shown, in some embodiments, a recessed portion 1341 is provided on the side of the control housing 134 away from the assembly housing 123 along the radial direction of the motor shaft 125, and the recessed portion 1341 is arranged away from the capacitor element 1322. Such a setting can, on the one hand, reduce the occupied space of the control housing 134 along the radial direction of the motor shaft 125, which is also conducive to integrating 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. Among them, the part of the cavity 1340 corresponding to the recessed portion 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 an assembly hole 1343, and the assembly hole 1343 is located in the recessed portion 1341. The control assembly 130 further includes a connection joint 135, which is passed through the assembly hole 1343 and is electrically connected to the capacitor element 1322. In this configuration, by freeing up a space smaller than the capacitor element 1322 to accommodate at least part of the connection joint 135, the space utilization rate is further improved.

[0065] See also Figure 1 and Figure 2 In some other embodiments, the first mounting portion 121 is provided with a first accommodation space, and the first electronic unit 131 is provided in the first accommodation space. In this way, not only the integration of the first electronic unit 131 relative to the assembly housing 123 is satisfied, but also at least part of the electronic components in the first electronic unit 131 are accommodated in the first accommodation space, which plays a protective role. Among them, the first accommodation space cooperates with the aforementioned concave cavity 1340 to enclose an accommodation space. The provision of the first accommodation space can reduce the size of the concave cavity 1340, thereby reducing the radial size 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 accommodation space, and the second electronic unit 132 is provided in the second accommodation space. The cooperation between the second accommodation space and the second electronic unit 132 may be similar to the cooperation between the first accommodation space and the first electronic unit 131, so it is not repeated here.

[0067] In other embodiments, the first installation portion 121 may be provided with a first accommodating space, and the aforementioned control housing 134 may be in a flat plate structure, blocking 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 an outer baffle 1232 arranged around the outer circumference of the cylindrical portion 1231. The cylindrical portion 1231 is arranged to form an assembly cavity 1230. The outer baffle 1232 is U-shaped. One end of the outer baffle 1232 along the axial direction of the motor shaft 125 protrudes from the cylindrical portion 1231 to form a first accommodation space; and the outer baffle 1232 protrudes from the cylindrical portion 1231 along the radial direction of the motor shaft 125 at the opening of the U-shape to form a second accommodation space. That is, the first mounting portion 121 and the second mounting portion 122 are both integrally formed in the assembly housing 123. The flange 1342 of the aforementioned control housing 134 is pressed on the outer baffle 1232 and fixed to the outer baffle 1232. The outer baffle 1232 may be provided with a mounting post 1235 , or the outer side wall of the cylindrical portion 1231 may be provided with a mounting post 1235 , so as to facilitate 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 other embodiments, the assembly housing 123 further includes a rear end plate 1233, which is connected to an end of the peripheral baffle 1232 that is away from the pump assembly 110 along the axial direction of the motor shaft 125. The space between the rear end plate 1233 and the cylindrical portion 1231 serves as a first accommodation space, and the opening of the first accommodation space is located on one side of the assembly housing 123 along the radial direction of the motor shaft 125. The first electronic unit 131 can be inserted into the first accommodation space. The control housing 134 is blocked at the opening of the first accommodation space to protect the first electronic unit 131.

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

[0071] In other embodiments, the first mounting portion 121 and the second mounting portion 122 may be in the form of a flat plate, respectively fixed to the end and the outer peripheral side of the assembly housing 123, and then connected to the first electronic unit 131 and the second electronic unit 132. In this case, the depth of the concave cavity 1340 of the control housing 134 may be increased accordingly. At the same time, a control housing may also be provided at the first mounting portion 121, as long as it can meet the requirements of assembling and protecting the first electronic unit 131.

[0072] See also Figure 1 , Figure 5 and Figure 6In some embodiments, the first electronic unit 131 includes a first substrate 1311 and a drive circuit and a main control circuit provided on the first substrate 1311. The drive circuit is electrically connected to the motor assembly 120, and the main control circuit is electrically connected to the drive circuit. The main control circuit at least includes a main control chip, which can apply instructions to the drive circuit, and then use the drive circuit to control the operation of the motor assembly 120. The first substrate 1311 is used to connect with the aforementioned first mounting portion 121, such as a screw connection, to achieve the assembly of the first electronic unit 131 relative to the motor assembly 120. Among them, the specific structure of the drive circuit and the main control circuit is an existing mature technology and will not be repeated here.

[0073] In some embodiments, the second electronic unit 132 also includes a second substrate 1321 and a power circuit provided on the second substrate 1321, the capacitor element 1322 is provided on the second substrate 1321 and is electrically connected to the power circuit, and the power circuit is electrically connected to the drive circuit. The power circuit is usually used to connect to an external power supply, so it is arranged on the outer peripheral side of the motor assembly 120, with more sufficient space, which is conducive to connecting to an external power supply. The second substrate 1321 is screwed to the second mounting portion 122 to realize the assembly of the second electronic unit 132 relative to the motor assembly 120. Among them, the specific structure of the power circuit is an existing mature technology and will not be repeated 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 install electronic components that form the main control circuit and the drive circuit; and both sides of the second substrate 1321 along its thickness direction can also be used to install electronic components that form the power supply circuit. The capacitor element 1322 is installed on the side of the second substrate 1321 along the thickness direction facing the control housing 134 to reduce the space occupied by the assembly housing 123. Alternatively, only the first substrate 1311 can be provided with electronic components on both sides along its thickness direction, or only the second substrate 1321 can be provided with electronic components on both sides along its thickness direction.

[0075] In actual use, the aforementioned control housing 134 is provided with an assembly hole 1343. The control assembly 130 further includes a connection joint 135, which is passed through the assembly hole 1343 and is electrically connected to the capacitor element 1322. The connection joint 135 is used to connect an external power source. The connection joint 135 can be electrically connected to the power circuit through a DC copper busbar. The DC copper busbar can be connected to the power circuit by welding, crimping, etc. to achieve electrical connection.

[0076] See also Figures 5 to 8As another example, two pump assemblies 110 and two motor assemblies 120 are provided, 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. Two first electronic units 131 and two second electronic units 132 are provided, 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 the respective corresponding motor assemblies 120.

[0077] That is to say, the two first electronic units 131 are located at one end of the two motor assemblies 120 facing each other along the axial direction of the motor shaft 125, and are electrically connected to the corresponding motor assemblies 120; and the two first electronic units 131 are electrically connected, which is convenient for connecting to an external power source. At the same time, the two second electronic units 132 are located on the outer peripheral side of the corresponding motor assemblies 120. Taking the cross-section of the motor assembly 120 as a square as an example, the first side of the motor assembly 120 can be a side facing upward in the vertical direction. The two second electronic units 132 are arranged on the same side, which further reduces the occupied space along the radial direction of the motor shaft 125.

[0078] Therefore, such a configuration fully utilizes the space between the two motor assemblies 120 and the space on the outer peripheral side of each motor assembly 120, and reduces the axial size while meeting the integrated assembly of the two motor assemblies 120. In addition, it is precisely because the two pump assemblies 110 are arranged at the opposite ends of the two motor assemblies 120 that it is easier to connect the pump assembly 110 to other structures (such as shock absorbers) through pipelines.

[0079] In some embodiments, the ends of the two motor assemblies 120 that are close to each other along the axial direction of the motor shaft 125 are ends facing each other, and the ends that are far away from each other along the axial direction of the motor shaft 125 are ends facing each other.

[0080] In some embodiments, one pump assembly 110 and one motor assembly 120 correspond to one hydraulic drive group, and the present embodiment is provided with two hydraulic drive groups, namely, the first hydraulic drive group and the 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 assembly housings 123 corresponding to the first motor assembly 120a and the second motor assembly 120b are provided with rear end plates 1233 on the sides facing each other, and are connected by the rear end plates 1233 to realize the integrated assembly of the two hydraulic drive groups; and the setting of the rear end plates 1233 can ensure that the assembly housings 123 of each motor assembly 120 are independent of each other, thereby ensuring that the two hydraulic drive groups are independently set. At this time, the connection joint 135 can be electrically connected to the power supply circuits in the two second electronic units 132 in a parallel manner.

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

[0082] That is to say, the two control housings 134 are connected to their respective corresponding assembly housings 123 to enclose a housing space respectively; and the two control housings 134 are arranged on the same side of the motor assembly 120 along the radial direction of the motor shaft 125, which means that the two second electronic units 132 are arranged on the same side to meet the radial dimension reduction. Each control housing 134 is connected to a corresponding connection connector 135, and each connection connector 135 is electrically connected to the corresponding power supply circuit. Moreover, such a setting can ensure that the two second electronic units 132 do not interfere with each other. When one of the second electronic units 132 is repaired or replaced, it is ensured that the other second electronic unit 132 is not affected, thereby improving safety.

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

[0084] Of course, in other embodiments, the first motor assembly 120a and the second motor assembly 120b may share a control housing 134, that is, the control housing 134 is provided with one, and the control housing 134 and the two motor assemblies 120 jointly enclose a space for accommodating the two second electronic units 132. In this case, the control housing 134 is relatively long and spans the two second mounting portions 122 to protect the two second electronic units 132. The control housing 134 may be provided with a recessed portion 1341, and the connecting joint 135 is provided through an assembly hole 1343 at the recessed portion 1341, and is connected in parallel with the two first electronic units 131.

[0085] Alternatively, the control housing 134 may also be provided with two recessed portions 1341, and each first electronic unit 131 corresponds to a recessed portion 1341 and an assembly hole 1343. Two connection joints 135 are provided, and are respectively provided in the corresponding assembly holes 1343 to be connected to the corresponding first electronic unit 131.

[0086] like Figure 5 and Figure 6As shown, in some other embodiments, the assembly housings 123 corresponding to the first motor assembly 120a and the second motor assembly 120b do not include a rear end plate, and one end of the two first accommodation spaces along the axial direction of the motor shaft 125 is open, and the two assembly housings 123 are fixed at the open positions, such as by welding, bonding or snap fit. In this case, the first motor assembly 120a and the second motor assembly 120b share a control housing 134, which meets the protection requirements 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, and along the axial direction of the motor shaft 125, the third electronic unit 133 and the two first electronic units 131 are stacked, and the third electronic unit 133 is arranged between the two first electronic units 131. The third electronic unit 133 is electrically connected to the first electronic unit 131 and the second electronic unit 132. In other words, by using the arrangement of the third electronic unit 133, another part of the electronic components can be separated to further reduce 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 arranged on the third substrate 1331, and the main control electronic component defines a main control circuit. The first electronic unit 131 includes a first substrate 1311 and a driving electronic component arranged on the first substrate 1311, and the driving electronic component defines 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 size.

[0088] That is to say, the main control circuit and the driving circuit can be separately arranged on the third substrate 1331 and the first substrate 1311. Since the driving circuit is usually a high voltage circuit, and the main control circuit is usually a low voltage circuit. Therefore, such a setting 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 ability of the driving circuit and the main control circuit.

[0089] like Figure 6As shown, in some embodiments, the control assembly 130 further includes a shielding layer 136, which is 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 circuit and the low-voltage circuit to reduce interference. It can be understood that it is precisely because the third electronic unit 133 and the two first electronic units 131 are stacked along the axial direction of the motor shaft 125, in order to maintain a compact arrangement with a small axial size, that the safety distance between each first electronic unit 131 and the third electronic unit 133 is insufficient, 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 the high-voltage circuit and the low-voltage circuit from direct contact, reducing the risk of accidental short circuit; and can protect the various main control electronic components of the main control circuit from high voltage and high current damage of the drive circuit, reduce electromagnetic interference, and thus improve the stability and reliability of signal transmission.

[0090] The shielding layer 136 may be an electrical isolation plate made of antistatic plastic material to reduce the generation and accumulation of static electricity. Low-voltage electronic components such as sensors may also be integrated on the third substrate 1331 .

[0091] In some embodiments, each motor assembly 120 may correspond to a third electronic unit 133. Two third electronic units 133 are stacked between two first electronic units 131. Each third electronic unit 133 and the corresponding first electronic unit 131 are installed together in the corresponding first accommodation 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. Such an arrangement can disperse the electronic components with larger sizes, further reduce the occupied space of the first electronic unit 131 and the third electronic unit 133 along the axial direction of the motor shaft 125, and further reduce the axial size. For example, when the driving electronic components with larger axial dimensions on the first substrate 1311 are arranged at the lower position, and the smaller ones are arranged at the upper position; then, the main control electronic components with larger axial dimensions on the third substrate 1331 are arranged at the upper position, and the smaller ones are arranged at the lower position.

[0093] In some other embodiments, main control electronic components are provided on both sides of the third substrate 1331 along the axial direction of the motor shaft 125, and driving electronic components are provided on both sides of the first substrate 1311 along the axial direction of the motor shaft 125. Such a configuration can make full use of the space on both sides of the thickness direction of the first substrate 1311 and the third substrate 1331, thereby reducing the radial dimension of the motor shaft 125. Alternatively, main control electronic components may be provided on both sides of the third substrate 1331, and driving electronic components may be provided on the side of the first substrate 1311 away from the third substrate 1331 along the axial direction of the motor shaft 125. This is only an example.

[0094] Another embodiment of the present application provides an active hydraulic suspension, including a shock absorber and the above-mentioned electric hydraulic pump, the electric hydraulic pump being in fluid communication with the shock absorber. The electric hydraulic pump is used to provide active vibration reduction control for the shock absorber, thereby improving the vibration reduction effect of the active hydraulic suspension. The active hydraulic suspension also includes a suspension body, and the above-mentioned electric hydraulic pump and shock absorber are both connected to the suspension body.

[0095] Another embodiment of the present application provides a car, including the above-mentioned active hydraulic suspension, the wheels are connected to the active hydraulic suspension through the wheel hub, and the active hydraulic suspension is connected to the body to support the wheels and the body, and then cooperate with other structures to achieve wheel motion trajectory control. The active hydraulic suspension can reduce the impact transmitted to the wheels due to road bumps during the operation of the car, thereby improving the stability and comfort of the car during driving.

[0096] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An electric hydraulic pump, characterized in that: include: Pump assembly; A motor assembly, wherein the motor assembly is provided with 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 drivingly connected to the pump assembly; The control assembly includes a first electronic unit and a second electronic unit, the first electronic unit is electrically connected to the second electronic unit and the motor assembly, the first electronic unit is arranged at one end of the motor assembly away from the pump assembly along the axial direction, the second electronic unit is arranged at the outer peripheral side of the motor assembly along the radial direction of the motor shaft, and the second electronic unit is provided with a capacitor element.

2. The electric hydraulic pump according to claim 1, characterized in that: The motor assembly comprises an assembly housing and a motor body, wherein the assembly housing is provided with an assembly cavity, the motor body is arranged in the assembly cavity, and the motor body is provided with the motor shaft; A first mounting portion is disposed at one end of the assembly housing away from the motor shaft, a second mounting portion is disposed on the outer peripheral side of the assembly housing, the first electronic unit is disposed on the first mounting portion, and the second electronic unit is disposed on the second mounting portion.

3. The electric hydraulic pump according to claim 2, characterized in that: The electric hydraulic pump further includes a control housing connected to the outer peripheral side of the assembly housing, and the control housing is provided with a cavity for accommodating the capacitor element.

4. The electric hydraulic pump according to claim 3, characterized in that: The control housing is provided with a recessed portion on one side of the motor shaft radially away from the assembly housing, and the recessed portion is arranged away from the capacitor element; The control housing is provided with an assembly hole, and the assembly hole is located in the recessed portion. The control assembly also includes a connecting joint, and the connecting joint is passed through the assembly hole and is electrically connected to the capacitor element.

5. The electric hydraulic pump according to claim 2, characterized in that: 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 electric hydraulic pump according to claim 1, characterized in that: The pump assembly and the motor assembly are each 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 motor shaft, and along the axial direction of the motor shaft, the two motor assemblies are located between the two pump assemblies; Two of the first electronic units and two of the second electronic units are provided, 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 each corresponding motor assembly.

7. The electric hydraulic pump according to claim 6, characterized in that: The control assembly also includes a third electronic unit. Along the axial direction of the motor shaft, the third electronic unit and the two first electronic units are stacked and arranged between the two first electronic units. The third electronic unit is electrically connected to the first electronic unit and the second electronic unit.

8. The electric hydraulic pump according to claim 7, characterized in that: 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 arranged on the third substrate; The driving electronic components and the main control electronic components are arranged in a staggered manner.

9. The electric hydraulic pump according to claim 8, characterized in that: At least one of the following is met: The main control electronic components are disposed on both sides of the third substrate along the axial direction of the motor assembly; The driving electronic components are disposed on both sides of the first substrate along the axial direction of the motor assembly; The control assembly further includes a shielding layer, and the shielding layer is arranged between the first electronic unit and the third electronic unit.

10. The electric hydraulic pump according to claim 6, characterized in that: The electric hydraulic pump further includes a control housing, which is connected to the motor assembly and encloses a receiving space for accommodating the second electronic unit with the motor assembly. The electric hydraulic pump satisfies at least one of the following conditions: There are two control housings, each of the motor assemblies and a corresponding control housing together enclose an accommodation space for accommodating a second electronic unit, and along the radial direction of the motor shaft, the two control housings are located on the first side of the motor assembly; The control housing is provided with one, and the control housing and the two motor assemblies together enclose an accommodation space for accommodating the two second electronic units; The control housing is provided with a recessed portion on a side of the motor shaft radially away from the motor assembly, and the recessed portion is arranged to avoid the capacitor element. The control housing is provided with an assembly hole, and the assembly hole is located in the recessed portion. The control assembly also includes a connecting joint, and the connecting joint is passed through the assembly hole and electrically connected to the capacitor element.

11. The electric hydraulic pump according to any one of claims 1 to 6, characterized in that: The first electronic unit includes a first substrate and a drive circuit and a main control circuit provided on the first substrate, the drive circuit is electrically connected to the motor assembly, and the main control circuit is electrically connected to the drive circuit; The second electronic unit further includes a second substrate and a power circuit disposed on the second substrate, the capacitor element is disposed on the second substrate and is electrically connected to the power circuit, and the power circuit is electrically connected to the drive circuit; The first substrate and the second substrate are both connected to the motor assembly.

12. An active hydraulic suspension, characterized in that: The active hydraulic suspension comprises: Shock absorbers; The electric hydraulic pump according to any one of claims 1 to 11, wherein the electric hydraulic pump is in fluid communication with the shock absorber.

13. A car, characterized in that: The automobile includes the active hydraulic suspension of claim 12 .

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