Electric hydraulic pump assembly, hydraulic suspension system and vehicle

Abstract

The utility model discloses an electric hydraulic pump assembly, a hydraulic suspension system and a vehicle, the electric hydraulic pump assembly comprises a pump body, an oil way pipeline and a pressure sensor, the oil way pipeline is connected with the pump body, and the oil way pipeline is used for being connected with a load; the pressure sensor is connected with an oil-way pipeline. In other words, the pressure sensor is externally arranged relative to the pump body. Therefore, on one hand, the structure of the pump body can be simplified, the utilization rate of the internal space of the pump body can be improved, the pressure sensor can be conveniently assembled on the pump body, and the electric hydraulic pump assembly has the advantages that the manufacturing cost is reduced; conditions are created for the pumping and drainage pressure of oil liquid when the pump body is lifted in the follow-up process; on the other hand, the accuracy of data obtained when the pressure sensor detects the oil pressure value can be improved.

Description

Technical Field

[0001] This application relates to the field of vehicle shock absorption technology, and in particular to an electro-hydraulic pump assembly, a hydraulic suspension system, and a vehicle. Background Technology

[0002] As a device that actively provides hydraulic energy to loads such as shock absorbers and hydraulic motors, the electro-hydraulic pump is a key component of active hydraulic suspension systems. Currently, existing electro-hydraulic pumps typically incorporate a pressure sensor inside the pump to detect the pressure of the hydraulic fluid. However, because the pressure sensor is mounted inside the pump, space must be reserved within the pump for its installation, increasing the overall size and production cost of the electro-hydraulic pump. Utility Model Content

[0003] Therefore, it is necessary to provide an electro-hydraulic pump assembly, hydraulic suspension system, and vehicle that facilitates the assembly of pressure sensors and reduces manufacturing costs.

[0004] An electro-hydraulic pump assembly for providing hydraulic pressure to a load, the electro-hydraulic pump assembly comprising:

[0005] Pump body;

[0006] An oil passage is provided, which is connected to the pump body and is also used to connect to the load.

[0007] A pressure sensor is connected to the oil pipeline.

[0008] Understandably, connecting the pressure sensor to the oil pipeline on the pump body for connecting the load allows the pressure sensor to be externally mounted relative to the pump body. This eliminates the need to reserve assembly space for the pressure sensor on the pump body. On the one hand, this simplifies the pump body structure, improves the utilization rate of the internal space of the pump body, and facilitates the assembly of the pressure sensor on the pump body. It also reduces the manufacturing cost of the electric hydraulic pump components and creates conditions for increasing the pumping pressure of the oil during the operation of the pump body. On the other hand, it also improves the accuracy of the oil pressure data detected by the pressure sensor.

[0009] In one embodiment, the pump body includes an oil inlet and an oil outlet;

[0010] The oil pipeline includes a first oil pipeline and a second oil pipeline. One end of the first oil pipeline is connected to the oil inlet, and one end of the second oil pipeline is connected to the oil outlet. The other ends of the first oil pipeline and the other ends of the second oil pipeline are respectively used to connect to the load.

[0011] The pressure sensor is connected to the first oil line pipeline and / or the second oil line pipeline.

[0012] In one embodiment, the pressure sensor includes a first pressure sensor and a second pressure sensor, the first pressure sensor being connected to the first oil line pipe and the second pressure sensor being connected to the second oil line pipe.

[0013] It is understandable that using external first and second pressure sensors to detect the oil pressure when the pump body is filled and discharged can meet the pressure detection requirements of the electric hydraulic pump assembly when providing hydraulic pressure to the load.

[0014] In one embodiment, the electro-hydraulic pump assembly further includes an adapter that connects to the oil line and the pressure sensor, respectively.

[0015] Understandably, the pressure sensor is connected to the oil pipeline via an adapter, thus enabling the assembly connection between the pressure sensor and the oil pipeline.

[0016] In one embodiment, the oil passage includes a first oil passage and a second oil passage, the first oil passage and the second oil passage being respectively connected to the pump body;

[0017] The adapter includes a first passage and a second passage, wherein the first passage is connected to the first oil pipe and the second passage is connected to the second oil pipe.

[0018] It is understandable that by connecting two independent first and second passages to the first and second oil passages respectively, conditions can be created for the subsequent connection of two pressure sensors to the oil passages.

[0019] In one embodiment, the pump body includes an oil inlet and an oil outlet;

[0020] The two ends of the first passage are respectively connected to the oil inlet and the first oil pipeline;

[0021] The two ends of the second passage are respectively connected to the oil outlet and the second oil pipeline.

[0022] It is understandable that the above structural design specifically realizes one embodiment of the adapter being mounted on the pump body.

[0023] In one embodiment, the pump body includes an oil inlet and an oil outlet, one end of the first oil passage is connected to the oil inlet, and one end of the second oil passage is connected to the oil outlet;

[0024] The first oil pipeline includes a first pipe section and a second pipe section. The two ends of the first pipe section are respectively connected to one end of the first passage and the oil inlet. One end of the second pipe section is connected to the other end of the first passage, and the other end of the second pipe section is used to connect to the load.

[0025] And / or, the second oil passage includes a third pipe section and a fourth pipe section, the two ends of the third pipe section are respectively connected to one end of the second passage and the oil outlet, one end of the fourth pipe section is connected to the other end of the second passage, and the other end of the fourth pipe section is used to connect to the load.

[0026] It is understandable that the above structural design specifically realizes one embodiment of the adapter being assembled on the oil pipeline.

[0027] In one embodiment, one end of the first passage is connected to the first oil pipeline, and the other end of the first passage is used to connect to the load.

[0028] One end of the second passage is connected to the second oil pipeline, and the other end of the second passage is used to connect to the load.

[0029] It is understandable that the above structural setup provides a specific embodiment of how the adapter is mounted on a load.

[0030] In one embodiment, the pressure sensor includes a first pressure sensor and a second pressure sensor;

[0031] The first pressure sensor is connected to the first channel, and the second pressure sensor is connected to the second channel.

[0032] In one embodiment, the adapter includes a first adapter portion, the first passage is disposed in the first adapter portion, and the first pressure sensor is mounted in the first adapter portion;

[0033] And / or, the adapter includes a second adapter portion, the second passage is disposed in the second adapter portion, and the second pressure sensor is mounted in the second adapter portion.

[0034] This application also claims protection for a hydraulic suspension system, the hydraulic suspension system comprising:

[0035] Shock absorbers;

[0036] The aforementioned electro-hydraulic pump assembly has its oil circuit connected to the shock absorber.

[0037] This application also claims protection for a vehicle, which includes:

[0038] Shock absorbers;

[0039] The aforementioned electro-hydraulic pump assembly has its oil circuit connected to the shock absorber.

[0040] Due to the application of the above technical solution, this application has the following advantages compared with related technologies:

[0041] The electro-hydraulic pump assembly, hydraulic suspension system, and vehicle claimed in this application connect a pressure sensor to the oil pipeline on the pump body for connecting the load. This allows the pressure sensor to be externally mounted relative to the pump body, eliminating the need to reserve assembly space for the pressure sensor on the pump body. This simplifies the pump body structure, improves the utilization rate of the internal space of the pump body, and facilitates the assembly of the pressure sensor on the pump body. It also reduces the manufacturing cost of the electro-hydraulic pump assembly and creates conditions for subsequently increasing the pumping pressure of the oil during operation. Furthermore, it improves the accuracy of the oil pressure data detected by the pressure sensor. Attached Figure Description

[0042] 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.

[0043] Figure 1 This is a partial structural schematic diagram of an electric hydraulic pump assembly provided in an embodiment of this application.

[0044] Figure 2 for Figure 1 The exploded diagram.

[0045] Figure 3 This is a schematic diagram of the adapter structure in this application.

[0046] Figure 4 This is a schematic diagram of the structure of the first pipe joint / second pipe joint in this application.

[0047] Figure 5 This is a schematic diagram of the structure of a hydraulic suspension system provided in an embodiment of this application.

[0048] Figure 6 for Figure 5 A structural diagram from another perspective.

[0049] Reference numerals: 100, Electro-hydraulic pump assembly; 10, Pump body; 11, Oil inlet; 12, Oil outlet; 20, Oil circuit pipeline; 21, First oil circuit pipeline; 22, Second oil circuit pipeline; 30, Pressure sensor; 31, First pressure sensor; 32, Second pressure sensor; 40, Adapter; 40a, First adapter; 40b, Second adapter; 41, First passage; 411, First pipe joint; 42, Second passage; 421, Second pipe joint; 200, Shock absorber; 300, Energy accumulator; 1000, Hydraulic suspension system. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] like Figure 5 , Figure 6 As shown, the electro-hydraulic pump assembly 100 claimed in this application is applied in a vehicle's hydraulic suspension system 1000. The electro-hydraulic pump assembly 100 is used to provide hydraulic pressure to a load. In this application, the load is illustrated using a shock absorber 200 as an example. The structure and working principle of the shock absorber 200 can be described using conventional methods in related technologies, and will not be elaborated here.

[0056] like Figures 1 to 6 As shown, the electro-hydraulic pump assembly 100 provided in this application includes a pump body 10, an oil passage 20, and a pressure sensor 30. The oil passage 20 is connected to the pump body 10 and is used to connect to the shock absorber 200; the pressure sensor 30 is connected to the oil passage 20. In other words, this application connects the pressure sensor 30 to the oil passage 20 on the pump body 10 for connecting to the shock absorber 200, making the pressure sensor 30 externally mounted relative to the pump body 10. As can be seen from the above, the electro-hydraulic pump assembly 100 of this application externalizes the pressure sensor 30, eliminating the need for the pump body 10 to reserve assembly space for the pressure sensor 30. This simplifies the structure of the pump body 10, improves the utilization rate of the internal space of the pump body 10, and facilitates the assembly of the pressure sensor 30 on the pump body 10, reducing the manufacturing cost of the electro-hydraulic pump assembly 100 and creating conditions for subsequently increasing the pumping pressure of the pump body 10 during operation. Furthermore, it improves the accuracy of the data when the pressure sensor 30 detects the oil pressure value.

[0057] It should be noted that when the electric hydraulic pump assembly 100 is working, the pump body 10 can supply oil to the shock absorber 200 through the oil pipeline 20, thereby achieving hydraulic drive of the shock absorber 200. In this application, the pressure sensor 30 is connected to the oil pipeline 20, allowing the pressure sensor 30 to directly detect the pressure of the oil within the oil pipeline 20. Compared to placing the pressure sensor inside the pump body 10, this avoids the influence of pressure loss on the oil within the oil pipeline 20, thus improving the accuracy of the oil pressure data detected by the pressure sensor 30 in this application.

[0058] In this embodiment, the pump body 10 is illustrated by an electric hydraulic pump, which includes a motor and a hydraulic pump connected together. The motor is used to drive the hydraulic pump to work. A pressure sensor is connected to the oil circuit of the hydraulic pump and is used to detect the pressure of the oil in the hydraulic pump.

[0059] like Figure 2As shown, in one embodiment, the pump body 10 includes an oil inlet 11 and an oil outlet 12; the oil passage 20 includes a first oil passage 21 and a second oil passage 22. One end of the first oil passage 21 is connected to the oil inlet 11, and one end of the second oil passage 22 is connected to the oil outlet 12. The other ends of the first oil passage 21 and the second oil passage 22 are respectively used to connect to the shock absorber 200. When the electro-hydraulic pump assembly 100 of this application is working, the oil outlet 12 on the pump body 10 can discharge to the shock absorber 200 through the second oil passage 22. Then, the shock absorber 200 returns the oil to the oil inlet 11 through the first oil passage 21, realizing the circulation of oil between the pump body 10 and the shock absorber 200, thereby realizing the hydraulic drive of the shock absorber 200 by the pump body 10.

[0060] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in this embodiment, the pressure sensor 30 is connected to the first oil passage 21 and / or the second oil passage 22. The pressure sensor 30 includes a first pressure sensor 31 and a second pressure sensor 32. The first pressure sensor 31 is connected to the first oil passage 21, and the second pressure sensor 32 is connected to the second oil passage 22. The electric hydraulic pump assembly 100 of this embodiment can use the external first pressure sensor 31 and the second pressure sensor 32 to detect the pressure of the oil when the pump body 10 is filled and discharged, thus meeting the pressure detection requirements of the electric hydraulic pump assembly 100 when providing hydraulic pressure to the shock absorber 200. It can be understood that in other embodiments, only the first pressure sensor 31 may be connected to the first oil passage 21, and the second pressure sensor may be integrated into the pump body 10; or, only the second pressure sensor 32 may be connected to the second oil passage 22, and the first pressure sensor may be integrated into the pump body 10. These will not be elaborated here.

[0061] like Figures 1 to 3 As shown, in one embodiment, the electric hydraulic pump assembly 100 further includes an adapter 40, which is connected to the oil line 20 and the pressure sensor 30 respectively. In this embodiment, the pressure sensor 30 is connected to the oil line 20 through the adapter 40, thus enabling the assembly connection between the pressure sensor 30 and the oil line 20.

[0062] like Figure 2As shown, in this embodiment, the adapter 40 includes a first passage 41 and a second passage 42. The first passage 41 is connected to the first oil pipe 21, and the second passage 42 is connected to the second oil pipe 22. That is, the adapter 40 in this embodiment can be connected to the first oil pipe 21 and the second oil pipe 22 on the oil pipe 20 using two independent first passages 41 and second passages 42 respectively. This creates conditions for the subsequent connection of the two pressure sensors 30 to the oil pipe 20. The first pressure sensor 31 is connected to the first passage 41, and the second pressure sensor 32 is connected to the second passage 42. Specifically, the first pressure sensor 31 and the second pressure sensor 32 can be fitted onto the corresponding first passage 41 and second passage 42 on the adapter 40 using a tight-fitting method.

[0063] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the adapter 40 is connected to a first pipe connector 411 on the first passage 41. The first oil pipe 21 can be connected and communicated with the first passage 41 through the first pipe connector 411, which facilitates the assembly connection between the first oil pipe 21 and the first passage 41 on the adapter 40. The assembly direction of the first oil pipe 21 and the first pipe connector 411 is opposite to the assembly direction of the first pressure sensor 31 on the first passage 41 of the adapter 40. This avoids the need for a sufficiently large assembly space when the first pressure sensor 31 and the first oil pipe 21 are assembled on the first passage 41 of the adapter 40, thus facilitating the assembly of the first pressure sensor 31 and the first oil pipe 21 on the first passage 41 of the adapter 40.

[0064] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the adapter 40 is connected to a second pipe connector 421 on the second passage 42. The second oil passage 22 can be connected and communicated with the second passage 42 through the second pipe connector 421, which facilitates the assembly and connection between the second oil passage 22 and the second passage 42 on the adapter 40. The assembly direction of the second oil passage 22 and the second pipe connector 421 is opposite to the assembly direction of the second pressure sensor 32 on the second passage 42 of the adapter 40. This avoids the need for a sufficiently large assembly space when the second pressure sensor 32 and the second oil passage 22 are assembled on the second passage 42 of the adapter 40, thus facilitating the assembly of the second pressure sensor 32 and the second oil passage 22 on the second passage 42 of the adapter 40.

[0065] In this embodiment, the adapter 40 includes a first adapter portion 40a and a second adapter portion 40b, which are connected to form an integral structure. A first passage 41 is disposed in the first adapter portion 40a, and a first pressure sensor 31 is mounted in the first adapter portion 40a; a second passage 42 is disposed in the second adapter portion 40b, and a second pressure sensor 32 is mounted in the second adapter portion 40b. It is understood that in some other embodiments, the first adapter portion 40a and the second adapter portion 40b may not be connected, i.e., the first adapter portion 40a and the second adapter portion 40b may be separately configured.

[0066] It is understood that in some embodiments, the adapter 40 may include only the first adapter portion 40a or only the second adapter portion 40b, with the first pressure sensor 31 and / or the second pressure sensor 32 mounted on the first adapter portion 40a, or the first pressure sensor 31 and / or the second pressure sensor 32 mounted on the second adapter portion 40b.

[0067] like Figure 1 , Figure 2 As shown, in this embodiment, the first pressure sensor 31 and the second pressure sensor 32 are disposed on the same side of the adapter 40.

[0068] It should be noted that in this embodiment, the number of adapters 40 is configured as one, that is, the first passage 41 and the second passage 42 of adapter 40 are connected as one unit, so that adapter 40 can be integrally injection molded from plastic material, which facilitates the production and manufacturing of adapter 40. It can be understood that in other embodiments, the number of adapters 40 may also be configured as two independent units, with the first passage 41 formed on one independent unit of adapter 40 and the second passage 42 formed on another independent unit of adapter 40, which will not be elaborated here.

[0069] It should be noted that, since the first pressure sensor 31 and the second pressure sensor 32 in this embodiment are connected to the adapter 40, it can be understood that the description of the specific position of the adapter 40 when it is assembled on the oil pipeline 20 can be used to describe the different installation positions of the first pressure sensor 31 and the second pressure sensor 32 relative to the external position of the pump body 10.

[0070] like Figure 1 , Figure 2 As shown, in one embodiment, the two ends of the first passage 41 are connected to the oil inlet 11 and the first oil pipe 21, respectively; the two ends of the second passage 42 are connected to the oil outlet 12 and the second oil pipe 22, respectively. That is to say, in this embodiment, the adapter 40 is assembled onto the pump body 10, specifically connected to the oil inlet 11 and the oil outlet 12 of the pump body 10.

[0071] In one embodiment, one end of the first oil passage pipe 21 is connected to the oil inlet 11, and one end of the second oil passage pipe 22 is connected to the oil outlet 12. The first oil passage pipe 21 includes a first pipe section (not shown) and a second pipe section (not shown). The two ends of the first pipe section are respectively connected to one end of the first passage 41 and the oil inlet 11, and one end of the second pipe section is connected to the other end of the first passage 41. The other end of the second pipe section is used to connect to the shock absorber 200. That is, in this embodiment, the first passage 41 on the adapter 40 is located on the path of the first oil passage pipe 21.

[0072] And / or, the second oil passage 22 includes a third pipe section (not shown) and a fourth pipe section (not shown). The two ends of the third pipe section are respectively connected to one end of the second passage 42 and the oil outlet 12. One end of the fourth pipe section is connected to the other end of the second passage 42, and the other end of the fourth pipe section is used to connect to the shock absorber 200. That is to say, in this embodiment, the second passage 42 on the adapter 40 is located on the path of the second oil passage 22.

[0073] In one embodiment, one end of the first passage 41 is connected to the first oil passage 21, and the other end of the first passage 41 is used to connect to the shock absorber 200; one end of the second passage 42 is connected to the second oil passage 22, and the other end of the second passage 42 is used to connect to the shock absorber 200. That is, in this embodiment, the adapter 40 is mounted on the shock absorber 200.

[0074] like Figure 5 , Figure 6 As shown, this application also provides a hydraulic suspension system 1000, including a shock absorber 200 and the aforementioned electro-hydraulic pump assembly 100. The oil passage 20 of the electro-hydraulic pump assembly 100 is connected to the shock absorber 200. An energy storage device 300 is connected to the first oil passage 21 and the second oil passage 22 of the oil passage 20, respectively. The energy storage device 300 transfers the oil flowing through the first oil passage 21 and the second oil passage 22 to meet the usage requirements of the electro-hydraulic pump assembly 100 in the hydraulic suspension system 1000. It should be noted that the specific structure of the energy storage device 300 can adopt conventional methods of related technologies, and will not be elaborated here.

[0075] In one embodiment, the hydraulic suspension system 1000 further includes a control module (not shown). The control module is electrically connected to both the control board (not shown) and the pressure sensor 30 in the pump body 10, allowing the pressure data detected by the pressure sensor 30 to be directly sent to the control module, which then controls the operation of the pump body 10. Since the pressure sensor 30 directly sends the detected pressure data to the control module, compared to the existing method of installing a pressure sensor electrically connected to the control board within the pump body 10, the electrical module on the control board within the pump body 10 is simplified, thus reducing the manufacturing cost of the pump body 10.

[0076] like Figure 5 , Figure 6 As shown, this application also provides a vehicle including a shock absorber 200 and the aforementioned electric hydraulic pump assembly 100, wherein the oil pipeline 20 of the electric hydraulic pump assembly 100 is connected to the shock absorber 200.

[0077] 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.

[0078] 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 assembly for providing hydraulic pressure to a load, characterized in that, The electro-hydraulic pump assembly (100) includes: Pump body (10); Oil pipe (20) is connected to the pump body (10) and is used to connect a load; Pressure sensor (30) is connected to the oil pipeline (20).

2. The electro-hydraulic pump assembly according to claim 1, characterized in that, The pump body (10) includes an oil inlet (11) and an oil outlet (12); The oil pipeline (20) includes a first oil pipeline (21) and a second oil pipeline (22). One end of the first oil pipeline (21) is connected to the oil inlet (11), and one end of the second oil pipeline (22) is connected to the oil outlet (12). The other ends of the first oil pipeline (21) and the other ends of the second oil pipeline (22) are respectively used to connect to the load. The pressure sensor (30) is connected to the first oil line pipe (21) and / or the second oil line pipe (22).

3. The electro-hydraulic pump assembly according to claim 2, characterized in that, The pressure sensor (30) includes a first pressure sensor (31) and a second pressure sensor (32). The first pressure sensor (31) is connected to the first oil line pipe (21), and the second pressure sensor (32) is connected to the second oil line pipe (22).

4. The electro-hydraulic pump assembly according to claim 1, characterized in that, The electric hydraulic pump assembly (100) also includes an adapter (40) which is connected to the oil line (20) and the pressure sensor (30) respectively.

5. The electro-hydraulic pump assembly according to claim 4, characterized in that, The oil pipeline (20) includes a first oil pipeline (21) and a second oil pipeline (22), and the first oil pipeline (21) and the second oil pipeline (22) are respectively connected to the pump body (10); The adapter (40) includes a first passage (41) and a second passage (42), the first passage (41) being connected to the first oil pipe (21) and the second passage (42) being connected to the second oil pipe (22).

6. The electro-hydraulic pump assembly according to claim 5, characterized in that, The pump body (10) includes an oil inlet (11) and an oil outlet (12); The two ends of the first passage (41) are respectively connected to the oil inlet (11) and the first oil pipeline (21); And / or, the two ends of the second passage (42) are respectively connected to the oil outlet (12) and the second oil pipeline (22).

7. The electro-hydraulic pump assembly according to claim 5, characterized in that, The pump body (10) includes an oil inlet (11) and an oil outlet (12); The first oil pipeline (21) includes a first pipe section and a second pipe section. The two ends of the first pipe section are respectively connected to one end of the first passage (41) and the oil inlet (11). One end of the second pipe section is connected to the other end of the first passage (41), and the other end of the second pipe section is used to connect to the load. And / or, the second oil passage (22) includes a third pipe section and a fourth pipe section, the two ends of the third pipe section are respectively connected to one end of the second passage (42) and the oil outlet (12), one end of the fourth pipe section is connected to the other end of the second passage, and the other end of the fourth pipe section is used to connect to the load.

8. The electro-hydraulic pump assembly according to claim 5, characterized in that, One end of the first passage (41) is connected to the first oil pipeline (21), and the other end of the first passage (41) is used to connect to the load; And / or, one end of the second passage (42) is connected to the second oil passage (22), and the other end of the second passage (42) is used to connect to a load.

9. The electro-hydraulic pump assembly according to any one of claims 5-8, characterized in that, The pressure sensor (30) includes a first pressure sensor (31) and a second pressure sensor (32); The first pressure sensor (31) is connected to the first passage (41), and the second pressure sensor (32) is connected to the second passage (42).

10. The electro-hydraulic pump assembly according to claim 9, characterized in that, The adapter (40) includes a first adapter (40a), a first passage (41) disposed in the first adapter (40a), and a first pressure sensor (31) mounted in the first adapter (40a). And / or, the adapter (40) includes a second adapter (40b), the second passage (42) is disposed in the second adapter (40b), and the second pressure sensor (32) is mounted in the second adapter (40b).

11. A hydraulic suspension system, characterized in that, The hydraulic suspension system (1000) includes: Shock absorber (200); The electro-hydraulic pump assembly (100) as described in any one of claims 1-10, wherein the oil passage (20) of the electro-hydraulic pump assembly (100) is connected to the shock absorber (200).

12. A vehicle, characterized in that, The vehicles include: Shock absorber (200) ； The electro-hydraulic pump assembly (100) as described in any one of claims 1-10, wherein the oil passage (20) of the electro-hydraulic pump assembly (100) is connected to the shock absorber (200).

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