Electric pump shell, electric pump, hydraulic energy supply device, chassis system and vehicle

Abstract

The invention discloses an electric pump shell, an electric pump, a hydraulic energy supply device, a chassis system and a vehicle. The electric pump shell comprises a shell body, the shell body is provided with a shaft hole, a liquid inlet groove penetrating in the axial direction is formed in the inner wall of the shaft hole of the shell body, and the liquid inlet groove is suitable for enabling a working medium to flow into the shell body; the inner wall of the shaft hole is further provided with a drainage hole, and the drainage hole communicates with the liquid inlet groove so that part of the working medium in the liquid inlet groove can flow into the shell body through the drainage hole. According to the electric pump shell, the liquid inlet groove penetrating in the axial direction is formed in the inner wall of the shaft hole of the shell body, the number of working media flowing into the shell body through the liquid inlet groove is increased, and meanwhile part of the working media flowing through the liquid inlet groove can flow into the shell body through the drainage hole communicating with the liquid inlet groove; according to the electric pump cooling system, a single fluid channel is adjusted into a plurality of fluid channels, and the electric pump shell structure can effectively improve the cooling effect of the electric pump.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an electric pump housing, an electric pump, a hydraulic energy supply device, a chassis system, and a vehicle. Background Art

[0002] As an important component of vehicle lubrication and cooling systems, electric pumps are widely used in various mechanical transmission and hydraulic systems. In related electric pump cooling systems, the gap between the inner wall of the shaft hole in the electric pump housing and the rotating shaft forms the oil inlet. The working medium flowing into the oil inlet cools the interior of the electric pump housing. Due to insufficient working medium in the shaft gap, the heat generated by the rotating shaft during high-speed rotation is difficult to dissipate in time. The cooling efficiency of the electric pump is low and cannot meet the heat dissipation requirements under high-speed and high-torque conditions. Therefore, how to optimize the electric pump housing to improve the cooling effect of the electric pump is a technical problem that needs to be solved urgently. Summary of the Invention

[0003] Embodiments of the present application provide an electric pump housing, an electric pump, a hydraulic energy supply device, a chassis system, and a vehicle to improve the cooling effect of the electric pump.

[0004] In the first aspect, an embodiment of the present application provides an electric pump housing, which includes a shell body; the shell body has an axial hole, and the inner wall of the axial hole of the shell body is provided with a liquid inlet groove that penetrates along the axial direction, and the liquid inlet groove is suitable for allowing the working medium to flow into the shell body; the inner wall of the axial hole is also provided with a leakage hole, and the leakage hole is connected to the liquid inlet groove so that part of the working medium in the liquid inlet groove can flow into the shell body through the leakage hole.

[0005] According to the electric pump housing of the embodiment of the present application, a liquid inlet groove is provided in the inner wall of the axial hole of the housing body so that the working medium flowing into the housing body through the liquid inlet groove is increased. At the same time, part of the working medium flowing through the liquid inlet groove can flow into the housing body through the leakage hole connected to the liquid inlet groove. The electric pump cooling system is adjusted from a single fluid channel to multiple fluid channels. The electric pump housing structure can effectively improve the cooling effect of the electric pump.

[0006] In a possible embodiment, at least one liquid storage tank is provided on the inner wall of the shaft hole, and the liquid storage tank is suitable for storing the working medium flowing through the liquid inlet tank.

[0007] In one possible implementation, the liquid storage tank includes at least one annular liquid storage tank.

[0008] In a possible implementation, the leakage hole is provided on the inner wall of the liquid storage tank of the shell body.

[0009] In a possible implementation, the drain hole is connected to the liquid inlet tank through the liquid storage tank.

[0010] In a possible embodiment, the shell body is provided with a groove near the shaft hole, and the groove is communicated with the liquid inlet groove.

[0011] In a possible embodiment, the shell body is provided with a first liquid inlet, the first liquid inlet is spaced apart from the liquid inlet groove, and the first liquid inlet is suitable for allowing the working medium to flow into the shell body.

[0012] In a possible implementation manner, the first liquid inlet and the liquid inlet groove are arranged on the same side of the shell body in the axial direction.

[0013] In a possible implementation manner, the shell body forms a second accommodating cavity, and the second accommodating cavity is suitable for accommodating the second rotor assembly and the stator assembly.

[0014] In a possible embodiment, the shell body is provided with a first liquid outlet, and the first liquid outlet is suitable for discharging the working medium in the second accommodating chamber.

[0015] In a possible implementation manner, the first liquid outlet and the liquid inlet groove are arranged on the same axial side of the shell body.

[0016] In a possible implementation, the second accommodating chamber includes a liquid storage chamber, which is suitable for accommodating the working medium in the shell body to cool the second rotor assembly and the stator assembly.

[0017] In a possible implementation, the electric pump housing further includes a partition, which is fixedly connected to the housing body, and the partition and the housing body enclose a liquid storage cavity.

[0018] In a possible embodiment, the electric pump housing further includes an end cover fixedly connected to the housing body, and the second accommodating cavity further includes a controller cavity, which is a space enclosed by the end cover and the partition, and is suitable for accommodating a controller.

[0019] In a possible embodiment, the electric pump housing further includes an end cover, which is fixedly connected to the shell body. The second accommodating chamber further includes a controller chamber, which is a space formed by the end cover and the shell body. The controller chamber is suitable for accommodating a controller, and the controller and the shell body form a liquid storage chamber.

[0020] In a possible embodiment, the electric pump housing further includes a pump cover, which is fixedly connected to the housing body. The pump cover and the housing body form a first accommodating cavity, which is suitable for accommodating the first rotor assembly.

[0021] In a possible implementation, the pump cover is provided with a second liquid inlet, and the second liquid inlet is suitable for allowing the working medium to flow into the first accommodating chamber.

[0022] In a possible embodiment, the pump cover and / or the shell body is provided with a second liquid outlet, and the second liquid outlet is suitable for discharging the working medium in the first accommodating chamber.

[0023] In the second aspect, an embodiment of the present application provides an electric pump housing, which includes a shell body, the shell body is provided with a first liquid inlet; the shell body has an axial hole, and the inner wall of the axial hole of the shell body is provided with a liquid inlet groove that passes through in the axial direction; the first liquid inlet and the liquid inlet groove are spaced apart, and the first liquid inlet and the liquid inlet groove are suitable for allowing the working medium to flow into the shell body.

[0024] In a possible embodiment, the shell body is provided with a groove near the shaft hole, and the groove is communicated with the liquid inlet groove.

[0025] In a possible embodiment, at least one liquid storage tank is provided on the inner wall of the shaft hole, and the liquid storage tank is suitable for storing the working medium flowing through the liquid inlet tank.

[0026] In a possible implementation manner, the first liquid inlet and the liquid inlet groove are arranged on the same side of the shell body in the axial direction.

[0027] In a possible embodiment, the shell body is provided with a first liquid outlet, and the first liquid outlet is suitable for discharging the working medium in the shell body.

[0028] In a possible implementation manner, the first liquid outlet and the liquid inlet groove are arranged on the same axial side of the shell body.

[0029] In a possible embodiment, the electric pump housing also includes a pump cover, which is fixedly connected to the shell body. The pump cover and the shell body form a first accommodating cavity, and the shell body forms a second accommodating cavity. The first liquid inlet and the liquid inlet groove can both connect the first accommodating cavity and the second accommodating cavity.

[0030] In a third aspect, an embodiment of the present application provides an electric pump, which includes the above-mentioned electric pump housing.

[0031] In a possible implementation, the electric pump includes a rotating shaft, the rotating shaft is passed through the shaft hole of the shell body, and the liquid inlet groove of the shell body and the rotating shaft form a first flow path inlet.

[0032] In a possible implementation, the shell body forms a second accommodating cavity, the second accommodating cavity is used to accommodate the second rotor assembly and the stator assembly, and the second rotor assembly is fixedly connected to the rotating shaft.

[0033] In a possible implementation, the shell body is provided with a first liquid outlet, and the electric pump includes a first fluid channel from the second accommodating chamber to the first liquid outlet via the first flow path inlet.

[0034] In a possible embodiment, a leakage hole is further provided on the inner wall of the shaft hole of the shell body, and the leakage hole is connected to the liquid inlet tank. The liquid inlet tank, the rotating shaft and the leakage hole form a second flow path inlet, and the electric pump includes a second fluid channel from the second accommodating chamber to the first liquid outlet via the second flow path inlet.

[0035] In a possible embodiment, a liquid storage tank is provided on the inner wall of the shaft hole, the leakage hole is connected to the liquid inlet tank through the liquid storage tank, and the liquid inlet tank, the rotating shaft, the liquid storage tank and the leakage hole form a second flow path inlet.

[0036] In one possible embodiment, the shell body is provided with a first liquid inlet, which is spaced apart from the liquid inlet tank; the rotating shaft is a hollow shaft, and the internal space of the rotating shaft is formed as a reflux hole, and the electric pump includes a third fluid channel from the second accommodating cavity to the reflux hole via the first liquid inlet.

[0037] In a possible embodiment, the electric pump housing further includes a partition, which is fixedly connected to the shell body. The partition and the shell body enclose a liquid storage chamber to form a second accommodating chamber. The liquid storage chamber can accommodate the working medium in the shell body for cooling the second rotor assembly and the stator assembly.

[0038] In a possible embodiment, the electric pump housing further includes an end cover fixedly connected to the housing body, and the end cover and the partition are enclosed to form a controller cavity of the second accommodating cavity, in which a controller is provided.

[0039] In a possible embodiment, the electric pump housing further includes an end cover, which is fixedly connected to the housing body. The end cover and the housing body together form a controller cavity of the second accommodating cavity. A controller is provided in the controller cavity. The controller and the housing body together form a liquid storage cavity.

[0040] In a possible embodiment, the electric pump housing further includes a pump cover, which forms a first accommodating cavity with the housing body. The first accommodating cavity is used to accommodate a first rotor assembly, which includes an inner rotor and an outer rotor, and the inner rotor is mounted on the rotating shaft.

[0041] In a fourth aspect, an embodiment of the present application provides a hydraulic energy supply device, which includes the above-mentioned electric pump.

[0042] In a fifth aspect, an embodiment of the present application provides a chassis system, which includes a shock absorber and the above-mentioned hydraulic power supply device, and the hydraulic power supply device is fluidically connected to the shock absorber.

[0043] In a sixth aspect, an embodiment of the present application provides a vehicle, which includes the above-mentioned electric pump, or the above-mentioned hydraulic power supply device, or the above-mentioned chassis system.

[0044] For the detailed description of the second to sixth aspects of this application and their various implementations, reference can be made to the detailed description of the first aspect and its various implementations. For the beneficial effects of the second to sixth aspects and their various implementations, reference can be made to the beneficial effect analysis of the first aspect and its various implementations, and no further details will be given here.

[0045] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the cross-sectional structure of the electric pump provided in the embodiment of the present application Figure 1 ;

[0047] Figure 2 Schematic diagram of the cross-sectional structure of the electric pump provided in the embodiment of the present application Figure 2 ;

[0048] Figure 3 Schematic diagram of the cross-sectional structure of the electric pump provided in the embodiment of the present application Figure 3 ;

[0049] Figure 4 A schematic structural diagram of the housing body and the first rotor assembly provided in an embodiment of the present application;

[0050] Figure 5 A schematic diagram of the three-dimensional structure of the shell body in one direction provided by an embodiment of the present application;

[0051] Figure 6 A schematic diagram of the three-dimensional structure of the shell body provided in an embodiment of the present application;

[0052] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the middle shell body along section AA;

[0053] Figure 8 A schematic diagram of the three-dimensional structure of the shell body provided in another direction according to an embodiment of the present application;

[0054] Figure 9 Schematic diagram of the explosion structure of the electric pump provided in an embodiment of the present application.

[0055] Reference numerals:

[0056] Electric pump 100; shell body 10; inner wall of shaft hole 11; liquid inlet groove 12; drain hole 13; liquid storage tank 14; groove 15; first liquid inlet 16; first liquid outlet 17; second accommodating chamber 20; liquid storage chamber 20a; controller chamber 20b; second rotor assembly 21; stator assembly 22; partition 30; end cover 40; pump cover 50; first accommodating chamber 51; first rotor assembly 52; inner rotor 52a; outer rotor 52b; second liquid inlet 53; second liquid outlet 54; rotating shaft 60; reflux hole 61; connecting piece 62; controller 70; first fluid channel A; second fluid channel B; third fluid channel C. DETAILED DESCRIPTION

[0057] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0058] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0059] The following combination Figures 1-9 The electric pump housing, the electric pump 100 , the hydraulic power supply device, the chassis system and the vehicle according to the embodiments of the present invention are described in detail.

[0060] In the examples of this application, refer to Figure 1 and Figure 2 、 Figure 4 and Figure 5 、 Figure 9 As shown, the electric pump housing includes a shell body 10, which has an axial hole. The inner wall 11 of the axial hole of the shell body 10 is provided with a liquid inlet groove 12 that penetrates in the axial direction. The liquid inlet groove 12 is suitable for allowing the working medium to flow into the shell body 10; the inner wall 11 of the axial hole is also provided with a leakage hole 13, which is connected to the liquid inlet groove 12 so that part of the working medium in the liquid inlet groove 12 can flow into the shell body 10 through the leakage hole 13. The axial hole of the shell body 10 is suitable for sleeved with the rotating shaft 60 of the electric pump 100. Furthermore, a flow control valve can be added to the liquid supply circuit of the working medium to achieve control of the flow rate and flow velocity of the working medium, thereby achieving control of the temperature and heat dissipation in the shell body 10, and achieving temperature control and regulation in the shell body 10. Optionally, the working medium is oil.

[0061] According to the electric pump housing of the embodiment of the present application, by providing an axially penetrating liquid inlet groove 12 on the inner wall 11 of the axial hole of the housing body 10, the amount of working medium flowing into the housing body 10 through the liquid inlet groove 12 is increased, thereby increasing the contact time and contact area between the rotating shaft 60 and the working medium. At the same time, part of the working medium flowing through the liquid inlet groove 12 can flow into the housing body 10 through the drain hole 13 connected to the liquid inlet groove 12, so that the working medium can flow into the housing body 10 quickly, accelerating the cooling rate of the electric pump 100 and making the cooling of the electric pump 100 more uniform. As a result, the liquid inlet groove 12 and the drain hole 13 allow the working medium to flow into the housing body 10 in two ways, and the electric pump cooling system is adjusted from a single fluid channel to multiple fluid channels, thereby accelerating the entry of the working medium into the housing body 10 and accelerating the cooling rate of the electric pump 100. This electric pump housing structure can effectively improve the cooling effect of the electric pump 100. In addition, the electric pump housing has a simple structure, is easy to manufacture and process, and is convenient to assemble, and has a wide range of application value.

[0062] In some embodiments of the present application, reference Figure 6 and Figure 7 As shown, the inner wall 11 of the shaft hole is provided with at least one liquid reservoir 14, which is suitable for storing the working medium flowing through the liquid inlet groove 12. The provision of at least one liquid reservoir 14 on the inner wall 11 of the shaft hole can increase the contact time and contact area between the rotating shaft 60 and the working medium, thereby accelerating the cooling speed and achieving a good cooling effect. At the same time, the provision of the liquid reservoir 14 can prevent interruptions in the flow of the working medium due to pressure fluctuations, forming an oil film for rapid lubrication, and extending the life of the rotating shaft 60.

[0063] In some embodiments of the present application, the liquid reservoir 14 includes at least one annular liquid reservoir. The liquid reservoir 14 can be provided as one or more liquid reservoirs according to actual liquid storage requirements. The liquid reservoir 14 is an annular flow path arranged circumferentially along the inner wall 11 of the shaft hole. It can quickly and effectively form an oil film, allowing the rotating shaft 60 to quickly establish a lubricated environment, reducing wear between the inner wall 11 of the shaft hole and the rotating shaft 60, avoiding poor operation of the electric pump 100, and improving the life of the electric pump 100. At the same time, the annular liquid reservoir can evenly distribute the working medium, allowing the working medium to quickly flow into the shell body 10 through the liquid inlet groove 12, thereby improving the cooling effect of the electric pump 100.

[0064] In some embodiments of the present application, the drain hole 13 is provided on the inner wall of the liquid reservoir of the housing 10. Since the liquid reservoir 14 can provide a temporary storage space for the working medium, the drain hole 13 is provided on the inner wall of the liquid reservoir to avoid interruption of the working medium in the liquid inlet tank 12 during the flow process, thereby effectively improving the cooling effect of the electric pump 100.

[0065] In some embodiments of the present application, the drain hole 13 is connected to the liquid inlet groove 12 through the liquid reservoir 14. The drain hole 13 and the liquid inlet groove 12 are located at different positions in the radial direction of the inner wall 11 of the shaft hole, and the two are connected through the liquid reservoir 14. The working medium flowing into the shell body 10 through the drain hole 13 and the working medium flowing into the shell body 10 through the liquid inlet groove 12 can be at different positions in the shell body 10, which can accelerate the cooling speed of the electric pump 100 and make the cooling of the electric pump 100 more uniform.

[0066] In some embodiments of the present application, reference Figure 4 and Figure 5 As shown, the shell body 10 is provided with a groove 15 near the axial hole, and the groove 15 is connected to the liquid inlet groove 12. The groove 15 on the shell body 10 is connected to the liquid inlet groove 12, so that more working medium can quickly enter the liquid inlet groove 12 through the groove 15. The working medium can enter the shell body 10 along the liquid inlet groove 12 and the drain hole 13.

[0067] In some embodiments of the present application, reference Figure 2 As shown, the shell body 10 is provided with a first liquid inlet 16, which is spaced apart from the liquid inlet groove 12. The first liquid inlet 16 is suitable for allowing the working medium to flow into the shell body 10. The first liquid inlet 16 is spaced apart from the liquid inlet groove 12 on the shell body 10, and the shell body 10 adds a fluid channel. The working medium can flow into the shell body 10 in three ways, respectively, through the liquid inlet groove 12, the drain hole 13, and the first liquid inlet 16. This allows the working medium to flow into the shell body 10 more quickly, further accelerating the cooling speed of the electric pump 100, making the cooling of the electric pump 100 more uniform, and further improving the cooling effect of the electric pump 100.

[0068] In some embodiments of the present application, the first liquid inlet 16 and the liquid inlet groove 12 are disposed on the same axial side of the housing body 10. Disposing the first liquid inlet 16 and the liquid inlet groove 12 on the same axial side of the housing body 10 can shorten the cooling flow path of the working medium, thereby improving the cooling effect of the electric pump 100, simplifying the flow path structure, and reducing the manufacturing complexity of the electric pump housing.

[0069] In some embodiments of the present application, the shell body 10 forms a second accommodating chamber 20, which is suitable for accommodating the second rotor assembly 21 and the stator assembly 22. The working medium can enter the second accommodating chamber 20 through the liquid inlet groove 12 and the drain hole 13 respectively to fully cool the second rotor assembly 21 and the stator assembly 22. Optionally, the working medium can also enter the second accommodating chamber 20 through the first liquid inlet 16. The three-way working medium entering the second accommodating chamber 20 can cool the parts of the second rotor assembly 21 and the stator assembly 22 that generate the most heat, and take away most of the heat generated by the winding copper loss of the stator assembly 22, the stator assembly 22 and / or the iron core loss of the second rotor assembly 21, thereby achieving precise cooling of the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20, with a high heat exchange rate and good heat dissipation effect on the second rotor assembly 21 and the stator assembly 22.

[0070] In some embodiments of the present application, reference Figure 8 As shown, the shell body 10 is provided with a first liquid outlet 17, which is suitable for discharging the working medium in the second accommodating chamber 20. The first liquid outlet 17 is directly connected to the external flow path and the second accommodating chamber 20. After the working medium in the second accommodating chamber 20 cools the second rotor assembly 21 and the stator assembly 22, it can be discharged to the outside through the first liquid outlet 17. Optionally, the first liquid outlet 17 can be connected to the external flow channel through a fluid pipeline, and the flow channel distance is shortened, which can accelerate the flow of the working medium, accelerate the cooling and heat exchange of the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20, improve the heat dissipation efficiency of the second rotor assembly 21 and the stator assembly 22, and effectively improve the cooling effect of the electric pump 100.

[0071] In some embodiments of the present application, the first liquid outlet 16 and the liquid inlet 12 are disposed on the same axial side of the shell body 10. The first liquid outlet 16 and the liquid inlet 12 are located on the same axial side of the shell body 10, so that the working medium in the second accommodating chamber 20 is fully cooled by the second rotor assembly 21 and the stator assembly 22 before being discharged to the outside through the first liquid outlet 16, thereby optimizing the flow path space utilization and reducing the flow distance of the working medium.

[0072] In some embodiments of the present application, the second accommodating chamber 20 includes a liquid storage chamber 20a, which is suitable for accommodating the working medium in the shell body 10 to cool the second rotor assembly 21 and the stator assembly 22. The liquid storage chamber 20a can store the working medium to provide continuous cooling for the second rotor assembly 21 and the stator assembly 22 in the liquid storage chamber 20a, especially to maintain a stable temperature under high load conditions of the electric pump 100. Figure 1 and Figure 2 As shown, the first liquid outlet 16 is disposed at the top of the liquid storage cavity 20a.

[0073] In some embodiments of the present application, a flow control valve is added to the working medium supply circuit. By controlling the flow rate and flow velocity of the working medium in each fluid channel, the temperature in the housing body 10 can be stabilized within a set range. Specifically, the liquid storage chamber 20a serves as a buffer for the working medium. In conjunction with the flow control valve in the liquid supply circuit, the flow rate and flow velocity of the working medium are controlled, thereby controlling the temperature and heat dissipation of the second rotor assembly 21 and stator assembly 22 in the liquid storage chamber 20a, thereby achieving temperature control and regulation in the liquid storage chamber 20a.

[0074] In some embodiments of the present application, the electric pump housing further includes a partition 30, which is fixedly connected to the housing body 10. The partition 30 and the housing body 10 enclose a liquid storage chamber 20a. The partition 30 and the housing body 10 enclose the liquid storage chamber 20a for accommodating the second rotor assembly 21 and the stator assembly 22, ensuring a clear flow path for the working medium and preventing mixed flow of the working medium. The working medium stored in the liquid storage chamber 20a provides continuous cooling for the second rotor assembly 21 and the stator assembly 22.

[0075] In some embodiments of the present application, the electric pump housing further includes an end cover 40, which is fixedly connected to the shell body 10, and the second accommodating chamber 20 further includes a controller chamber 20b, which is a space enclosed by the end cover 40 and the partition 30, and the controller chamber 20b is suitable for accommodating a controller 70. The end cover 40 and the shell body 10 can be fixedly connected by bolts or other fixings. By setting the controller chamber 20b, the controller 70 can be spatially isolated from the second rotor assembly 21 and the stator assembly 22, thereby improving the system safety of the electric pump 100. Optionally, one axial side of the stator assembly 22 is connected to the partition 30 by a puncture terminal, so that the controller 70 controls the stator assembly 22.

[0076] In some embodiments of the present application, the electric pump housing further includes an end cap 40, which is fixedly connected to the housing body 10. The second accommodating chamber 20 further includes a controller chamber 20b, which is a space enclosed by the end cap 40 and the housing body 10. The controller chamber 20b is suitable for accommodating a controller 70, which, together with the housing body 10, forms a liquid storage chamber 20a. The end cap 40 and the housing body 10 can be fixedly connected by bolts or other fasteners. A controller 70 that can prevent working media such as oil is used. The controller 70 and the shell body 10 are directly enclosed to form a liquid storage chamber 20a, and the partition 30 is eliminated. The controller chamber 20b formed by the end cover 40 and the shell body 10 is used to accommodate the controller 70. The working medium entering the second accommodating chamber 20 can cool the second rotor assembly 21 and the stator assembly 22 in the liquid storage chamber 20a, and can also directly contact the controller 70 to cool the controller 70, taking away a large amount of heat from the second rotor assembly 21, the stator assembly 22 and the controller 70, thereby greatly improving the cooling effect of the electric pump 100, and has a simple structure and low cost.

[0077] In some embodiments of the present application, the electric pump housing further includes a pump cover 50, which is fixedly connected to the housing body 10. The pump cover 50 and the housing body 10 form a first accommodating chamber 51, which is suitable for accommodating a first rotor assembly 52. ​​Through the cooperation between the pump cover 50 and the housing body 10, the first accommodating chamber 51 forms an independent accommodating space for the first rotor assembly 52, so that the required working medium (e.g., high-pressure working medium) can be delivered through the action of the first rotor assembly 52.

[0078] In some embodiments of the present application, the pump cover 50 is provided with a second liquid inlet 53, which is suitable for allowing the working medium to flow into the first accommodating chamber 51. The second liquid inlet 53 can be provided on the end face of the electric pump 100, or on the side of the electric pump 100. The working medium flows into the first accommodating chamber 51 from the second liquid inlet 53 on the pump cover 50. After passing through the first rotor assembly 52 in the first accommodating chamber 51, the working medium can enter the second accommodating chamber 20 through the liquid inlet groove 12 and the drain hole 13 to fully cool the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20. Optionally, after passing through the first rotor assembly 52 in the first accommodating chamber 51, the working medium can also enter the second accommodating chamber 20 through the first liquid inlet 16 to fully cool the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20.

[0079] In some embodiments of the present application, the pump cover 50 and / or the shell body 10 is provided with a second liquid outlet 54, which is suitable for discharging the working medium in the first accommodating chamber 51. The second liquid outlet 54 can be provided on the end face of the electric pump 100, or on the side of the electric pump 100. The working medium flows into the first accommodating chamber 51 through the second liquid inlet 53 on the pump cover 50. After passing through the first rotor assembly 52 in the first accommodating chamber 51, the working medium can be discharged from the first accommodating chamber 51 to the outside through the second liquid outlet 54. Optionally, the second liquid outlet 54 is connected to the first liquid outlet 17 to form a liquid cooling cycle with an external electric pump cooling system.

[0080] In some embodiments of the present application, the liquid inlet 12, the drain hole 13, the liquid storage tank 14, the groove 15, the first liquid inlet 16, the first liquid outlet 17, the second liquid inlet 53 and / or the second liquid outlet 54 can all be processed by a milling machine, which can ensure processing accuracy and facilitate installation.

[0081] According to the electric pump housing of the second embodiment of the present application, Figure 3 As shown, the electric pump housing includes a housing body 10, which is provided with a first liquid inlet 16. The housing body 10 has an axial hole, and the inner wall 11 of the axial hole of the housing body 10 is provided with a liquid inlet groove 12 extending axially therethrough. The first liquid inlet 16 is spaced apart from the liquid inlet groove 12, and the first liquid inlet 16 and the liquid inlet groove 12 are adapted to allow the working medium to flow into the housing body 10. The axial hole of the housing body 10 is adapted to receive the rotating shaft 60 of the electric pump 100. Furthermore, a flow control valve can be added to the working medium supply circuit to control the flow rate and flow velocity of the working medium, thereby controlling the temperature and heat dissipation in the housing body 10, thereby achieving temperature control and regulation in the housing body 10. Optionally, the working medium is oil.

[0082] According to the electric pump housing of the embodiment of the present application, by providing an axially penetrating liquid inlet groove 12 on the inner wall 11 of the axial hole of the housing body 10, the amount of working medium flowing into the housing body 10 through the liquid inlet groove 12 is increased, thereby increasing the contact time and contact area between the rotating shaft 60 and the working medium. At the same time, a first liquid inlet 16 is provided on the housing body 10 spaced apart from the liquid inlet groove 12, thereby adding a fluid channel to the housing body 10, further increasing the amount of working medium flowing into the housing body 10. Thus, the liquid inlet groove 12 and the first liquid inlet 16 allow the working medium to flow into the housing body 10 in two ways. The electric pump cooling system is adjusted from a single fluid channel to multiple fluid channels, allowing the working medium to flow into the housing body 10 faster, accelerating the cooling speed of the electric pump 100, and making the cooling of the electric pump 100 more uniform. The electric pump housing structure can effectively improve the cooling effect of the electric pump 100. In addition, the electric pump housing has a simple structure, is easy to manufacture and process, and is convenient to assemble, and has a wide range of application value.

[0083] In some embodiments of the present application, the housing body 10 is provided with a groove 15 near the axial hole, and the groove 15 is connected to the liquid inlet groove 14. The groove 15 on the housing body 10 is connected to the liquid inlet groove 12, so that more working medium can quickly enter the liquid inlet groove 12 through the groove 15, and the working medium can enter the housing body 10 along the liquid inlet groove 12.

[0084] In some embodiments of the present application, at least one liquid reservoir 14 is provided on the inner wall 11 of the shaft hole. The liquid reservoir 14 is adapted to store the working medium flowing through the liquid inlet groove 12. Providing at least one liquid reservoir 14 on the inner wall 11 of the shaft hole can increase the contact time and contact area between the rotating shaft 60 and the working medium, resulting in faster cooling and better cooling effects. Furthermore, the provision of the liquid reservoir 14 can prevent interruptions in the flow of the working medium due to pressure fluctuations, thereby forming an oil film for rapid lubrication.

[0085] In some embodiments of the present application, the first liquid inlet 16 and the liquid inlet groove 12 are disposed on the same axial side of the housing body 10. Disposing the first liquid inlet 16 and the liquid inlet groove 12 on the same axial side of the housing body 10 can shorten the cooling flow path of the working medium, thereby improving the cooling effect of the electric pump 100, simplifying the flow path structure, and reducing the manufacturing complexity of the electric pump housing.

[0086] In some embodiments of the present application, the housing 10 is provided with a first liquid outlet 17, which is suitable for discharging the working medium in the housing 10. The first liquid outlet 17 directly connects the external flow path and the interior of the housing 10. After cooling and heat exchange, the working medium in the housing 10 can be discharged to the outside through the first liquid outlet 17. Optionally, the first liquid outlet 17 can be connected to the external flow channel via a fluid conduit, shortening the flow channel distance, accelerating the flow of the working medium, accelerating the cooling and heat exchange of components in the housing 10, improving heat dissipation efficiency, and effectively improving the cooling effect of the electric pump 100.

[0087] In some embodiments of the present application, the first liquid outlet 16 and the liquid inlet 12 are disposed on the same axial side of the shell body 10. The first liquid outlet 16 and the liquid inlet 12 are located on the same axial side of the shell body 10, so that the working medium in the shell body 10 can be fully cooled and heat-exchanged before being discharged to the outside through the first liquid outlet 16, thereby optimizing the flow path space utilization and reducing the flow distance of the working medium.

[0088] In some embodiments of the present application, the electric pump housing further comprises a pump cover 50, which is fixedly connected to the housing body 10. The pump cover 50 and the housing body 10 form a first accommodating chamber 51, and the housing body 10 forms a second accommodating chamber 20. The first liquid inlet 16 and the liquid inlet groove 12 can both communicate with the first accommodating chamber 51 and the second accommodating chamber 20. The pump cover 50 is spaced apart from the first accommodating chamber 51 formed by the housing body 10 and the second accommodating chamber 20 formed by the housing body 10, and can cool and dissipate heat from the components in the first accommodating chamber 51 and the second accommodating chamber 20, respectively. At the same time, the first liquid inlet 16 and the liquid inlet groove 12 can both communicate with the first accommodating chamber 51 and the second accommodating chamber 20. The working medium in the first accommodating chamber 51 can flow into the second accommodating chamber 20 through the first liquid inlet 16 and the liquid inlet groove 12, simplifying the flow path structure of the first accommodating chamber 51 and the second accommodating chamber 20, effectively improving the cooling effect of the electric pump 100, and the electric pump housing has a simple structure, easy manufacturing and processing, and convenient assembly.

[0089] According to the electric pump 100 of the third embodiment of the present application, the electric pump 100 includes the above-mentioned electric pump housing. Optionally, the electric pump 100 is a gear pump. For example, the electric pump 100 is an external gear pump.

[0090] According to the electric pump 100 of the embodiment of the present application, by providing multiple fluid channels in the housing 10, it is possible to increase the amount of working medium flowing into the housing 10, allowing the working medium to flow into the housing 10 more quickly, accelerating the cooling rate of the electric pump 100, and making the cooling of the electric pump 100 more uniform, thereby effectively improving the cooling effect of the electric pump 100. Furthermore, the electric pump 100 has a simple structure, is easy to manufacture and process, and is convenient to assemble, and has a wide range of applications.

[0091] In some embodiments of the present application, the electric pump 100 includes a rotating shaft 60, which is inserted into the axial hole of the housing 10. The liquid inlet groove 12 of the housing 10 and the rotating shaft 60 form a first fluid inlet. The space between the liquid inlet groove 12 on the inner wall 11 of the axial hole in the housing 10 and the rotating shaft 60 forms the first fluid inlet. Compared to the oil inlet formed by the gap between the inner wall of the axial hole and the rotating shaft of the electric pump housing in the prior art, more working medium flows into the housing 10 through the first fluid inlet, thereby increasing the contact time and contact area between the rotating shaft 60 and the working medium, resulting in faster cooling and better cooling effect.

[0092] In some embodiments of the present application, the housing 10 forms a second accommodating cavity 20 for accommodating a second rotor assembly 21 and a stator assembly 22. The second rotor assembly 21 is fixedly connected to the rotating shaft 60. The second rotor assembly 21 includes a magnet, for example, an injection-molded magnet. Injection-molded magnets can improve the magnetic field stability between the second rotor assembly 21 and the stator assembly 22 while reducing magnet costs. Optionally, the second rotor assembly 21 and the rotating shaft 60 have an interference fit, allowing the second rotor assembly 21 to rotate with the rotating shaft 60.

[0093] In some embodiments of the present application, the second rotor assembly 21 is fixedly connected to the rotating shaft 60 via a connector 62. The connector 62 may be a bushing (e.g., a circular bushing) disposed radially inwardly of the second rotor assembly 21 for fixing the rotating shaft 60 and the second rotor assembly 21.

[0094] In some embodiments of the present application, reference Figures 1 to 3 As shown, the housing 10 is provided with a first liquid outlet 17, and the electric pump 100 includes a first fluid channel A extending from the second accommodating chamber 20 to the first liquid outlet 17 via a first flow path inlet. The working medium in the first fluid channel A enters the second accommodating chamber 20 through the liquid inlet groove 12, cools the second rotor assembly 21 and stator assembly 22 in the second accommodating chamber 20, and is then discharged to the outside of the electric pump 100 through the first liquid outlet 17.

[0095] In some embodiments of the present application, reference Figure 1 and Figure 2 As shown, the inner wall 11 of the shaft hole of the housing body 10 is further provided with a drain hole 13, which is connected to the liquid inlet groove 12. The liquid inlet groove 12, the rotating shaft 60, and the drain hole 13 form a second flow path inlet. The electric pump 100 includes a second fluid channel B from the second accommodating chamber 20 to the first liquid outlet 17 via the second flow path inlet. The working medium flows into the second accommodating chamber 20 from the liquid inlet groove 12, and a portion of the working medium flows directly from the liquid inlet groove 12 into the second accommodating chamber 20, where it cools the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20 through the first fluid channel A. Another part of the working medium cools and dissipates heat to the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20 through the second fluid channel B. Specifically, the other part of the working medium passes through the liquid inlet groove 12 and flows into the second accommodating chamber 20 through the leakage hole 13 connected to the liquid inlet groove 12, cools the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20, and is then discharged to the outside of the electric pump 100 through the first liquid outlet 17.

[0096] In some embodiments of the present application, a liquid reservoir 14 is provided on the inner wall 11 of the shaft hole, and the drain hole 13 is connected to the liquid inlet 12 through the liquid reservoir 14. The liquid inlet 12, the rotating shaft 60, the liquid reservoir 14 and the drain hole 13 form a second flow path inlet. Providing the liquid reservoir 14 on the inner wall 11 of the shaft hole can increase the contact time and contact area between the rotating shaft 60 and the working medium. After passing through the liquid inlet 12, the working medium first flows into the liquid reservoir 14, and then flows into the second accommodating chamber 20 through the drain hole 13 connected to the liquid reservoir 14. This can ensure the cooling and heat dissipation effect of the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20, while increasing the contact time and contact area between the rotating shaft 60 and the working medium, resulting in a fast cooling speed and good cooling effect. At the same time, the working medium in the liquid reservoir 14 can quickly form an oil film to lubricate the rotating shaft 60.

[0097] In some embodiments of the present application, reference Figure 3 As shown, the housing 10 is provided with a first liquid inlet 16, which is spaced apart from the liquid inlet tank 12. The rotating shaft 60 is a hollow shaft, and the interior space of the rotating shaft 60 forms a return hole 61. The electric pump 100 includes a third fluid channel C extending from the second accommodating chamber 20 to the return hole 61 via the first liquid inlet 16. The working medium in the third fluid channel C enters the second accommodating chamber 20 through the first liquid inlet 16, cools the second rotor assembly 21 and the stator assembly 22 in the second accommodating chamber 20, and then flows out of the second accommodating chamber 20 through the return hole 61.

[0098] In some embodiments of the present application, the electric pump 100 can use different multi-fluid channels to cool the second rotor assembly 21 and the stator assembly 22 according to different cooling requirements. For example: Figure 1 As shown, the electric pump 100 includes two fluid channels, a first fluid channel A and a second fluid channel B. Figure 2 As shown, the electric pump 100 includes three fluid channels: a first fluid channel A, a second fluid channel B, and a third fluid channel C. Figure 3 As shown, the electric pump 100 includes two fluid channels, a first fluid channel A and a third fluid channel C.

[0099] In some embodiments of the present application, the electric pump housing further includes a partition 30, which is fixedly connected to the housing body 10. The partition 30 and the housing body 10 enclose a liquid storage chamber 20a of the second accommodating chamber 20. The liquid storage chamber 20a can accommodate the working medium in the housing body 10 for cooling the second rotor assembly 21 and the stator assembly 22. The partition 30 and the housing body 10 enclose the liquid storage chamber 20a for accommodating the second rotor assembly 21 and the stator assembly 22, ensuring a clear flow path for the working medium and preventing mixed flow of the working medium. The working medium stored in the liquid storage chamber 20a provides continuous cooling for the second rotor assembly 21 and the stator assembly 22.

[0100] In some embodiments of the present application, the electric pump housing further includes an end cap 40, which is fixedly connected to the housing body 10. The end cap 40 and the partition 30 enclose a controller chamber 20b of the second accommodating chamber 20, and the controller 70 is disposed in the controller chamber 20b. The end cap 40 and the partition 30 enclose the controller chamber 20b, thereby spatially isolating the controller 70 from the second rotor assembly 21 and the stator assembly 22, thereby improving the system safety of the electric pump 100.

[0101] In some embodiments of the present application, the electric pump housing further comprises an end cap 40, which is fixedly connected to the housing body 10. The end cap 40 and the housing body 10 enclose a controller chamber 20b of the second accommodating chamber 20, in which a controller 70 is disposed. The controller 70 and the housing body 10 enclose a liquid storage chamber 20a. The controller 70 and the housing body 10 directly enclose the liquid storage chamber 20a, eliminating the partition 30. The controller chamber 20b formed by the end cap 40 and the housing body 10 is used to accommodate the controller 70. The working medium entering the second accommodating chamber 20 can either cool the second rotor assembly 21 and the stator assembly 22 in the liquid storage chamber 20a or directly contact the controller 70 to cool the controller 70, thereby removing a large amount of heat from the second rotor assembly 21, the stator assembly 22, and the controller 70. This greatly improves the cooling effect of the electric pump 100, and the structure is simple and the cost is low.

[0102] In some embodiments of the present application, the electric pump housing further comprises a pump cover 50. The pump cover 50 and the housing body 10 form a first accommodating chamber 51. The first accommodating chamber 51 is used to accommodate a first rotor assembly 52. ​​The first rotor assembly 52 includes an inner rotor 52a and an outer rotor 52b. The inner rotor 52a is mounted on the rotating shaft 60. Through the cooperation of the pump cover 50 and the housing body 10, the first accommodating chamber 51 forms an independent accommodating space for the first rotor assembly 52, so that the required working medium (e.g., high-pressure working medium) can be delivered through the action of the inner rotor 52a and the outer rotor 52b. Optionally, the electric pump 100 is a gear pump, the inner rotor 52a is an internal gear rotor, and the outer rotor 52b is an external gear rotor.

[0103] In some embodiments of the present application, the inner rotor 52a and the rotating shaft 60 are connected by an interference fit. The rotating shaft 60 and the inner rotor 52a are connected and operate at the same speed, and the connection method is interference fit drive. The second rotor assembly 21 and the stator assembly 22 drive the inner rotor 52a to rotate through the principle of electromagnetic force. The second rotor assembly 21 and the inner rotor 52a rotate with the rotating shaft 60.

[0104] In some embodiments of the present application, the reflux hole 61 of the rotating shaft 60 is connected to the first accommodating chamber 51 , and the working medium flowing from the reflux hole 61 to the first accommodating chamber 51 can be discharged to the outside through the second liquid outlet 54 .

[0105] According to the hydraulic energy supply device of the fourth embodiment of the present application, the hydraulic energy supply device includes the above-mentioned electric pump 100.

[0106] According to the hydraulic energy supply device of the embodiment of the present application, by setting multiple fluid channels in the shell body 10 of the electric pump 10, the working medium flowing into the shell body 10 can be increased, so that the working medium can flow into the shell body 10 faster, thereby accelerating the cooling speed of the electric pump 100, making the cooling of the electric pump 100 more uniform, and effectively improving the cooling effect of the electric pump 100 in the hydraulic energy supply device. The electric pump 100 of the hydraulic energy supply device has a simple structure, is easy to manufacture and process, and is convenient to assemble.

[0107] According to the chassis system of the fifth embodiment of the present application, the chassis system includes a shock absorber and the above-mentioned hydraulic power supply device, and the hydraulic power supply device is fluidically connected to the shock absorber.

[0108] According to the chassis system of the embodiment of the present application, by applying the above-mentioned hydraulic energy supply device, the cooling effect of the electric pump 100 in the chassis system can be improved. The electric pump 100 of the chassis system has a simple structure, is easy to manufacture and process, and is convenient to assemble.

[0109] According to the vehicle of the sixth embodiment of the present application, the vehicle includes the above-mentioned electric pump 100, or the above-mentioned hydraulic power supply device, or the above-mentioned chassis system.

[0110] According to the vehicle of the embodiment of the present application, by applying the above-mentioned electric pump 100, hydraulic power supply device or chassis system, the cooling effect of the electric pump 100 in the vehicle chassis system can be improved. The electric pump 100 of the vehicle has a simple structure, is easy to manufacture and process, and is convenient to assemble.

[0111] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections, or communication; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0112] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0113] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An electric pump housing, characterized in that: The electric pump housing includes a housing body (10); The shell body (10) has an axial hole, and an inner wall (11) of the axial hole of the shell body (10) is provided with a liquid inlet groove (12) extending through the axial direction, wherein the liquid inlet groove (12) is suitable for allowing a working medium to flow into the shell body (10); The inner wall (11) of the shaft hole is further provided with a leakage hole (13), and the leakage hole (13) is communicated with the liquid inlet groove (12), so that part of the working medium in the liquid inlet groove (12) can flow into the shell body (10) through the leakage hole (13).

2. The electric pump housing according to claim 1, characterized in that The inner wall (11) of the shaft hole is provided with at least one liquid storage tank (14), and the liquid storage tank (14) is suitable for storing the working medium flowing through the liquid inlet tank (12).

3. The electric pump housing according to claim 2, characterized in that The liquid storage tank (14) includes at least one annular liquid storage tank (14).

4. The electric pump housing according to claim 2, characterized in that The leakage hole (13) is arranged on the inner wall of the liquid storage tank (14) of the shell body (10).

5. The electric pump housing according to claim 4, characterized in that The leakage hole (13) is connected to the liquid inlet tank (12) through the liquid storage tank (14).

6. The electric pump housing according to claim 1, characterized in that The shell body (10) is provided with a groove (15) at a position close to the axial hole, and the groove (15) is communicated with the liquid inlet groove (12).

7. The electric pump housing according to claim 1, characterized in that The shell body (10) is provided with a first liquid inlet (16), the first liquid inlet (16) is spaced apart from the liquid inlet groove (12), and the first liquid inlet (16) is suitable for allowing the working medium to flow into the shell body (10).

8. The electric pump housing according to claim 7, characterized in that The first liquid inlet (16) and the liquid inlet groove (12) are arranged on the same side of the shell body (10) in the axial direction.

9. The electric pump housing according to any one of claims 1 to 8, characterized in that: The shell body (10) forms a second accommodating cavity (20), and the second accommodating cavity (20) is suitable for accommodating a second rotor assembly (21) and a stator assembly (22).

10. The electric pump housing according to claim 9, characterized in that The shell body (10) is provided with a first liquid outlet (17), and the first liquid outlet (17) is suitable for discharging the working medium in the second accommodating cavity (20).

11. The electric pump housing according to claim 10, characterized in that: The first liquid outlet (17) and the liquid inlet groove (12) are arranged on the same axial side of the shell body (10).

12. The electric pump housing according to claim 9, characterized in that The second accommodating chamber (20) includes a liquid storage chamber (20a), and the liquid storage chamber (20a) is suitable for accommodating the working medium in the shell body (10) to cool the second rotor assembly (21) and the stator assembly (22).

13. The electric pump housing according to claim 12, characterized in that The electric pump housing further comprises a partition (30), wherein the partition (30) is fixedly connected to the housing body (10), and the partition (30) and the housing body (10) enclose the liquid storage chamber (20a).

14. The electric pump housing according to claim 13, characterized in that The electric pump housing further comprises an end cover (40), wherein the end cover (40) is fixedly connected to the housing body (10); the second accommodating chamber (20) further comprises a controller chamber (20b), wherein the controller chamber (20b) is a space enclosed by the end cover (40) and the partition (30); and the controller chamber (20b) is suitable for accommodating a controller (70).

15. The electric pump housing according to claim 12, characterized in that The electric pump housing further comprises an end cover (40), wherein the end cover (40) is fixedly connected to the housing body (10), and the second accommodating chamber (20) further comprises a controller chamber (20b), wherein the controller chamber (20b) is a space enclosed by the end cover (40) and the housing body (10), and the controller chamber (20b) is suitable for accommodating a controller (70), and the controller (70) and the housing body (10) enclose the liquid storage chamber (20a).

16. The electric pump housing according to any one of claims 1 to 8, characterized in that: The electric pump housing further comprises a pump cover (50), wherein the pump cover (50) is fixedly connected to the housing body (10), and the pump cover (50) and the housing body (10) form a first accommodating cavity (51), wherein the first accommodating cavity (51) is suitable for accommodating a first rotor assembly (52).

17. The electric pump housing according to claim 16, characterized in that The pump cover (50) is provided with a second liquid inlet (53), and the second liquid inlet (53) is suitable for allowing the working medium to flow into the first accommodating chamber (51).

18. The electric pump housing according to claim 16, wherein: The pump cover (50) and / or the shell body (10) is provided with a second liquid outlet (54), and the second liquid outlet (54) is suitable for discharging the working medium in the first accommodating cavity (51).

19. An electric pump housing, characterized in that: The electric pump housing comprises a housing body (10), wherein the housing body (10) is provided with a first liquid inlet (16); The shell body (10) has an axial hole, and an inner wall (11) of the axial hole of the shell body (10) is provided with a liquid inlet groove (12) penetrating in the axial direction; The first liquid inlet (16) and the liquid inlet groove (12) are spaced apart from each other, and the first liquid inlet (16) and the liquid inlet groove (12) are suitable for allowing the working medium to flow into the shell body (10).

20. The electric pump housing according to claim 19, wherein: The shell body (10) is provided with a groove (15) at a position close to the axial hole, and the groove (15) is communicated with the liquid inlet groove (12).

21. The electric pump housing according to claim 19, wherein: The inner wall (11) of the shaft hole is provided with at least one liquid storage tank (14), and the liquid storage tank (14) is suitable for storing the working medium flowing through the liquid inlet tank (12).

22. The electric pump housing according to claim 19, wherein: The first liquid inlet (16) and the liquid inlet groove (12) are arranged on the same side of the shell body (10) in the axial direction.

23. The electric pump housing according to claim 19, wherein The shell body (10) is provided with a first liquid outlet (17), and the first liquid outlet (17) is suitable for discharging the working medium in the shell body (10).

24. The electric pump housing according to claim 23, characterized in that The first liquid outlet (17) and the liquid inlet groove (12) are arranged on the same axial side of the shell body (10).

25. The electric pump housing according to any one of claims 19 to 24, characterized in that: The electric pump housing further comprises a pump cover (50), wherein the pump cover (50) is fixedly connected to the housing body (10), wherein the pump cover (50) and the housing body (10) form a first accommodating cavity (51), and the housing body (10) forms a second accommodating cavity (20), and the first liquid inlet (16) and the liquid inlet groove (12) can both communicate with the first accommodating cavity (51) and the second accommodating cavity (20).

26. An electric pump (100), characterized in that The electric pump (100) comprises the electric pump housing according to any one of claims 1 to 25.

27. The electric pump (100) according to claim 26, characterized in that The electric pump (100) comprises a rotating shaft (60), the rotating shaft (60) is passed through the shaft hole of the shell body (10), and the liquid inlet groove (12) of the shell body (10) and the rotating shaft (60) form a first flow path inlet.

28. The electric pump (100) according to claim 27, characterized in that The shell body (10) forms a second accommodating cavity (20), the second accommodating cavity (20) is used to accommodate a second rotor assembly (21) and a stator assembly (22), and the second rotor assembly (21) is fixedly connected to the rotating shaft (60).

29. The electric pump (100) according to claim 28, characterized in that The shell body (10) is provided with a first liquid outlet (17), and the electric pump (100) includes a first fluid channel (A) from the second accommodating chamber (20) to the first liquid outlet (17) via the first flow path inlet.

30. The electric pump (100) according to claim 29, characterized in that The inner wall (11) of the shaft hole of the shell body (10) is further provided with a leakage hole (13), the leakage hole (13) is communicated with the liquid inlet groove (12), the liquid inlet groove (12), the rotating shaft (60) and the leakage hole (13) form a second flow path inlet, and the electric pump (100) includes a second fluid channel (B) from the second accommodating chamber (20) to the first liquid outlet (17) via the second flow path inlet.

31. The electric pump (100) according to claim 30, characterized in that The inner wall (11) of the shaft hole is provided with a liquid storage tank (14), the leakage hole (13) is connected with the liquid inlet tank (12) through the liquid storage tank (14), and the liquid inlet tank (12), the rotating shaft (60), the liquid storage tank (14) and the leakage hole (13) form the second flow path inlet.

32. The electric pump (100) according to any one of claims 29 to 31, characterized in that The shell body (10) is provided with a first liquid inlet (16), and the first liquid inlet (16) is spaced apart from the liquid inlet groove (12); the rotating shaft (60) is a hollow shaft, and the internal space of the rotating shaft (60) is formed as a reflux hole (61); the electric pump (100) includes a third fluid channel (C) from the second accommodating cavity (20) to the reflux hole (61) via the first liquid inlet (16).

33. The electric pump (100) according to claim 28, characterized in that The electric pump housing further comprises a partition (30), wherein the partition (30) is fixedly connected to the housing body (10), and the partition (30) and the housing body (10) enclose a liquid storage cavity (20a) of the second accommodating cavity (20), and the liquid storage cavity (20a) can accommodate the working medium in the housing body (10) for cooling the second rotor assembly (21) and the stator assembly (22).

34. The electric pump (100) according to claim 33, characterized in that The electric pump housing further comprises an end cover (40), wherein the end cover (40) is fixedly connected to the housing body (10), and the end cover (40) and the partition (30) enclose a controller cavity (20b) of the second accommodating cavity (20), wherein a controller (70) is provided in the controller cavity (20b).

35. The electric pump (100) according to claim 33, characterized in that The electric pump housing further comprises an end cover (40), wherein the end cover (40) is fixedly connected to the housing body (10), and the end cover (40) and the housing body (10) enclose a controller cavity (20b) of the second accommodating cavity (20), wherein a controller (70) is provided in the controller cavity (20b), and the controller (70) and the housing body (10) enclose the liquid storage cavity (20a).

36. The electric pump (100) according to claim 28, characterized in that The electric pump housing further comprises a pump cover (50), wherein the pump cover (50) and the housing body (10) form a first accommodating cavity (51), wherein the first accommodating cavity (51) is used to accommodate a first rotor assembly (52), wherein the first rotor assembly (52) comprises an inner rotor (52a) and an outer rotor (52b), and wherein the inner rotor (52a) is mounted on the rotating shaft (60).

37. A hydraulic energy supply device, characterized in that: The hydraulic energy supply device comprises an electric pump (100) according to any one of claims 26 to 36.

38. A chassis system, characterized in that: The chassis system includes a shock absorber and a hydraulic power supply as claimed in claim 37, the hydraulic power supply being fluidly connected to the shock absorber.

39. A vehicle, characterized in that: The vehicle comprises the electric pump (100) according to any one of claims 26 to 36, or the hydraulic energy supply device according to claim 37, or the chassis system according to claim 38.

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