Motor assembly, hydraulic energy supply device, chassis system, and vehicle

Abstract

The present application provides a motor assembly, a hydraulic energy supply device, a chassis system, and a vehicle. The motor assembly comprises a first housing, a second housing, a cover body, and first sealing members. The first housing is provided with a first sealing portion. The second housing is connected to the first housing. The second housing is provided with a second sealing portion. The second sealing portion and the first sealing portion are located at the end of the second housing and the end of the first housing close to each other. The cover body is connected to the same side of the first housing and the second housing in a first direction. The cover body comprises a third sealing portion. The first sealing portion and the second sealing portion each comprise slots or protrusions. The third sealing portion comprises protrusions or slots. The protrusions are adapted to be inserted into the slots. The first sealing members are connected between the first sealing portion and the third sealing portion and between the second sealing portion and the third sealing portion. Each first sealing member comprises a first sealing layer and a second sealing layer. The first sealing layer and the second sealing layer are respectively arranged on two opposite sides of the corresponding protrusion along a third direction, so as to improve the sealing performance.

Description

Motor assembly, hydraulic energy supply device, chassis system and vehicle

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 2024213092674, filed on June 7, 2024, and entitled "Motor assembly, hydraulic energy supply device, chassis system and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the technical field of vehicles, and in particular relates to a motor assembly, a hydraulic energy supply device, a chassis system and a vehicle. BACKGROUND

[0004] In related technologies, a motor assembly includes a motor controller and at least two motors. An electric control shell of the motor controller is connected with a shell of the at least two motors. Each motor is connected in turn. A preformed, self-supporting and / or possibly elastic sealing element is arranged between the electric control shell and the shell, and between the shells. However, at the position where the connection between the electric control shell and the shell and the connection between the adjacent shells intersect, since the connection between the electric control shell and the shell and the connection between the adjacent shells are not sealed at the same time, there is a problem of unreliable sealing.

[0005] Utility model content

[0006] In the application content part, a series of simplified concepts are introduced, which will be further described in detail in the specific embodiment part. The application content part does not mean to try to limit the key features and necessary technical features of the claimed technical solution, and even less to try to determine the protection scope of the claimed technical solution.

[0007] To at least partially solve the above problems, the first aspect of the present application provides a motor assembly, comprising:

[0008] A first shell, an end portion of the first shell in a first direction is provided with a first sealing portion, the first sealing portion extends along a second direction, the first direction intersects with the second direction;

[0009] A second shell, the second shell and the first shell are opposite and connected in the second direction, an end portion of the second shell in the first direction is provided with a second sealing portion, the second sealing portion extends along the second direction, the second sealing portion and the first sealing portion are located at the end portions of the second shell and the first shell close to each other;

[0010] a cover connected to the same side of the first casing and the second casing in the first direction, the cover comprising a third sealing part, wherein the first sealing part and the second sealing part comprise a groove or a protrusion, the third sealing part comprises a protrusion or a groove, the protrusion is adapted to be inserted into the groove; and

[0011] a first sealing member connected between the first sealing part and the third sealing part, and between the second sealing part and the third sealing part, the first sealing member comprising a first sealing layer and a second sealing layer, the first sealing layer and the second sealing layer are respectively arranged on opposite sides of the protrusion in a third direction, the third direction intersects with the first direction and the second direction.

[0012] According to the motor assembly of the first aspect of the present application, the first sealing member is arranged between the first sealing part of the first casing and the third sealing part of the cover, and between the second sealing part of the second casing and the third sealing part of the cover at the connection of the first casing, the second casing and the cover. Specifically, the first sealing layer and the second sealing layer of the first sealing member are respectively arranged on opposite sides of the protrusion in the third direction, thereby increasing the sealing area of the connection of the first casing and the cover, and the connection of the second casing and the cover, thereby helping to improve the sealing performance of the first casing and the cover, and the sealing performance of the second casing and the cover.

[0013] Optionally, the groove comprises a bottom surface, a first groove side and a second groove side, the first groove side and the second groove side are oppositely arranged in the third direction, and the bottom surface is connected to the first groove side and the second groove side.

[0014] The protrusion comprises a top surface, a first protrusion side and a second protrusion side, the first protrusion side and the second protrusion side are oppositely arranged in the third direction, and the top surface is connected to the first protrusion side and the second protrusion side.

[0015] The first sealing layer is arranged between the first groove side and the first protrusion side, and the second sealing layer is arranged between the second groove side and the second protrusion side.

[0016] Optionally, the first sealing member further comprises a third sealing layer, the third sealing layer is arranged between the bottom surface and the top surface.

[0017] Optionally, the first sealing layer, the third sealing layer and the second sealing layer are sequentially connected.

[0018] Optionally, the first casing comprises a first mounting surface and a first set of partial bosses, the partial bosses protrude from the first mounting surface along the first direction, the first set of partial bosses comprises two partial bosses arranged spaced apart along the third direction, the recess is formed between the two partial bosses of the first set of partial bosses, the first sealing portion is configured as the recess;

[0019] The cover comprises a second mounting surface and a first partial groove, the second mounting surface is directly or indirectly connected to the first mounting surface, the partial groove is recessed relative to the second mounting surface along the second direction, the first set of partial grooves comprises two partial grooves arranged spaced apart along the third direction, the protrusion is formed between the two partial grooves, the third sealing portion is configured as the protrusion, the partial groove is adapted to accommodate the partial boss.

[0020] Optionally, the first casing comprises a first mounting surface and the recess, the recess is recessed relative to the first mounting surface along the first direction;

[0021] The cover comprises a second mounting surface and the protrusion, the second mounting surface is directly or indirectly connected to the first mounting surface, the protrusion is protruded relative to the second mounting surface along the second direction.

[0022] Optionally, the cover comprises a stop edge, the stop edge is located at an end of the cover close to the first casing along the first direction;

[0023] Wherein, in a plane perpendicular to the first direction, the orthographic projection of the stop edge is located outside the orthographic projection of the first casing, in a plane perpendicular to the third direction, the orthographic projection of the stop edge at least partially overlaps the orthographic projection of the first casing.

[0024] Optionally, the first casing and the second casing each comprise a connecting lug protruded along the third direction, the connecting lug comprises a first connecting hole through along the second direction;

[0025] The connecting lug located at the first casing and the connecting lug located at the second casing are oppositely arranged along the second direction, the connecting lug located at the first casing and the connecting lug located at the second casing are adapted to connect a fastening assembly to fasten the first casing to the second casing.

[0026] Optionally, at least one of the first housing and the second housing is provided with an insertion portion, the insertion portion comprising a first hole portion extending along the second direction and a second hole portion located at an end of the first housing away from the first sealing portion along the first direction, the second hole portion extending along the first direction and being communicated to the first hole portion;

[0027] At least one of the first housing and the second housing is provided with a connecting boss extending along the second direction, the connecting boss being inserted into the first hole portion;

[0028] The motor assembly comprises a fastener at least partially penetrating the second hole portion and being fastened to the first housing and the second housing.

[0029] Optionally, the first housing and the second housing each have an axial end surface facing each other in the second direction;

[0030] The connecting boss protrudes from the axial end surface, the connecting boss comprising an insertion hole penetrating along the first direction, a hole wall of the insertion hole away from the axial end surface in the second direction being formed with a first guide surface, the distance between the first guide surface and the axial end surface in the second direction gradually increasing from a side close to the first sealing portion to a side away from the first sealing portion along the first direction;

[0031] The motor assembly comprises an insertion piece adapted to be inserted into the insertion hole, the insertion piece comprising a second guide surface adapted to be fitted to the first guide surface;

[0032] The fastener is fastened to the insertion piece and the first housing or the second housing.

[0033] Optionally, the first guide surface is inclined to the third direction;

[0034] The second guide surface is inclined to the third direction, and the inclination direction of the second guide surface is the same as that of the first guide surface.

[0035] Optionally, the first housing comprises a first positioning portion arranged at a side of the insertion hole;

[0036] The insertion piece comprises a second positioning portion located at a side of the insertion piece;

[0037] One of the first positioning portion and the second positioning portion is configured as a positioning groove, and the other of the first positioning portion and the second positioning portion is configured as a positioning boss inserted into the positioning groove.

[0038] Optionally, the first housing and the second housing each has an axial end face facing each other in the second direction.

[0039] The motor assembly further comprises a second seal connected between the axial end face of the first housing and the axial end face of the second housing.

[0040] Optionally, the first housing and the second housing are identical.

[0041] The second aspect of the present application provides a hydraulic energy supply device, comprising the above motor assembly.

[0042] According to the hydraulic energy supply device of the second aspect of the present application, by applying the above motor assembly, the sealing performance of the hydraulic energy supply device can be effectively improved.

[0043] Optionally, the hydraulic energy supply device further comprises a first hydraulic pump and a second hydraulic pump oppositely arranged in the second direction, the motor assembly comprises a first motor and a second motor oppositely arranged and connected in the second direction, the first hydraulic pump is connected to an end of the first motor away from the second motor in the second direction, so as to be suitable for driving the first hydraulic pump by the first motor, and the second hydraulic pump is connected to an end of the second motor away from the first motor in the second direction, so as to be suitable for driving the second hydraulic pump by the second motor.

[0044] The third aspect of the present application provides a chassis system, comprising:

[0045] a shock absorber; and the above hydraulic energy supply device fluidly connected to the shock absorber.

[0046] According to the chassis system of the third aspect of the present application, by applying the above hydraulic energy supply device, the stability of the damping performance of the chassis system can be improved.

[0047] The fourth aspect of the present application provides a vehicle, comprising the above motor assembly, or the above hydraulic energy supply device, or the above chassis system.

[0048] According to the vehicle of the fourth aspect of the present application, by applying the above motor assembly, or the above hydraulic energy supply device, or the above chassis system, the stability of the vehicle performance can be improved, thereby facilitating the user to obtain a better use experience. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to make the technical solutions in the embodiments of the present application or the related art clearer, the accompanying drawings needed in the embodiments or the related art description will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0050] Fig. 1 is a perspective view of a hydraulic energy supply device according to an embodiment of the present application;

[0051] Fig. 2 is an exploded perspective view of the hydraulic energy supply device shown in Fig. 1;

[0052] Fig. 3 is a perspective view of two motors, two hydraulic pumps and two cantilever assemblies in Fig. 1 in a state of being installed;

[0053] Fig. 4 is a front view of Fig. 3;

[0054] Fig. 5 is a sectional view of Fig. 3, in which the core of the motor and other components are omitted;

[0055] Fig. 6 is an enlarged view of portion I in Fig. 5;

[0056] Fig. 7 is a bottom view of Fig. 3;

[0057] Fig. 8 is a sectional view taken along line A-A in Fig. 7;

[0058] Fig. 9 is a perspective view of a cover according to an embodiment of the present application;

[0059] Fig. 10 is a structural schematic view of a plug-in member in Fig. 2;

[0060] Fig. 11 is a bottom view of one motor, a plug-in member and a fastener in Fig. 7 in a state of being installed;

[0061] Fig. 12 is a partial enlarged view of a connection between a cover and a casing according to an embodiment of the present application;

[0062] Fig. 13 is a structural schematic view of a hydraulic energy supply device according to an embodiment of the present application;

[0063] Fig. 14 is a structural schematic view of a chassis system according to an embodiment of the present application;

[0064] Fig. 15 is a structural schematic view of a vehicle according to an embodiment of the present application;

[0065] Fig. 16 is a structural schematic view of a vehicle according to another embodiment of the present application;

[0066] Fig. 17 is a structural schematic view of a vehicle according to still another embodiment of the present application.

[0067] 100 - first motor; 101 - first housing; 101a - first receiving portion; 101b - first positioning portion; 101c - third connecting hole; 102 - axial end face; 103 - first sealing portion; 103a - bottom surface; 103b - first recessed side surface; 103c - second recessed side surface; 104 - recess; 105 - first mounting surface; 106 - partial boss; 107 - connecting lug; 107a - first connecting hole; 108 - insertion portion; 108a - first hole portion; 108b - second hole portion; 111 - connecting boss; 111a - insertion hole; 111b - first guide surface; 120 - second motor; 121 - second housing; 121a - second receiving portion; 123 - second sealing portion; 131 - receiving groove; 150 - motor controller; 151 - cover body; 152 - third sealing portion; 152a - top surface; 152b - first protruding side surface; 152c - second protruding side surface; 152d - protrusion; 153 - second mounting surface; 154 - partial groove; 155 - stopper; 161 - first sealing member; 161a - first sealing layer; 161b - second sealing layer; 161c - third sealing layer; 162 - second sealing member; 171 - insertion member; 171a - second guide surface; 171b - second connecting hole; 171c - second positioning portion; 172 - fastener; 181 - first hydraulic pump; 182 - second hydraulic pump; 190 - cantilever assembly; 200 - motor assembly; 300 - hydraulic energy supply device; 400 - chassis system; 1000 - vehicle; D1 - first direction; D2 - second direction; D3 - third direction. DETAILED DESCRIPTION

[0068] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0069] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0070] In the description of the application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0071] In the description of the application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0072] The application provides an electric machine assembly, a hydraulic energy supply device with the electric machine assembly, a chassis system with the hydraulic energy supply device and a vehicle.

[0073] As shown in FIGS. 1-12, embodiments of the present application provide a motor assembly 200. The motor assembly 200 according to embodiments of the present application can include at least two housings, a cover 151, and a first seal 161. The at least two housings include a first housing 101 and a second housing 121. An end of the first housing 101 in a first direction D1 is provided with a first sealing portion 103. The first sealing portion 103 extends along a second direction D2. The first direction D1 intersects the second direction D2, and further, the first direction D1 is perpendicular to the second direction D2. The second housing 121 and the first housing 101 are opposite and connected in the second direction D2. An end of the second housing 121 in the first direction D1 is provided with a second sealing portion 123. The second sealing portion 123 extends along the second direction D2. The second sealing portion 123 and the first sealing portion 103 are located at ends of the second housing 121 and the first housing 101 close to each other. That is, the second sealing portion 123 is located at an end of the second housing 121 close to the first housing 101 in the second direction D2. The first sealing portion 103 is located at an end of the first housing 101 close to the second housing 121 in the second direction D2. The cover 151 is connected to the same side of the first housing 101 and the second housing 121 in the first direction D1. The cover 151 includes a third sealing portion 152. The first sealing portion 103 and the second sealing portion 123 include a groove 104 or a protrusion 152d. The third sealing portion 152 includes a protrusion 152d or a groove 104. That is, if the first sealing portion 103 and the second sealing portion 123 include the groove 104, the third sealing portion 152 includes the protrusion 152d; if the first sealing portion 103 and the second sealing portion 123 include the protrusion 152d, the third sealing portion 152 includes the groove 104. The protrusion 152d is adapted to be inserted into the groove 104. The first seal 161 is connected between the first sealing portion 103 and the third sealing portion 152, and between the second sealing portion 123 and the third sealing portion 152. That is, the first seal 161 is located between the aforementioned groove 104 and the protrusion 152d. The first seal 161 can include a first sealing layer 161a and a second sealing layer 161b. The first sealing layer 161a and the second sealing layer 161b are respectively provided on opposite sides of the protrusion 152d in a third direction D3. The third direction D3 intersects the first direction D1 and the second direction D2, and further, the third direction D3 is perpendicular to the first direction D1 and the second direction D2. That is, the first sealing layer 161a is located in a gap between a side surface of the protrusion 152d and a side groove wall of the groove 104 in the third direction D3. Correspondingly, the second sealing layer 161b is located in a gap between another side surface of the protrusion 152d and another side groove wall of the groove 104 in the third direction D3. The third direction D3 is perpendicular to the first direction D1 and the second direction D2. The first housing 101 is a housing of a first motor 100. The second housing 121 is a housing of a second motor 120. The cover 151 is at least a part of a housing of a motor controller 150.

[0074] According to the motor assembly 200 of the embodiments of the present application, the first seal 161 is arranged between the first sealing part 103 of the first casing 101 and the third sealing part 152 of the cover 151 and between the second sealing part 123 of the second casing 121 and the third sealing part 152 of the cover 151 at the connection of the first casing 101, the second casing 121 and the cover 151. Specifically, the first sealing layer 161a and the second sealing layer 161b of the first seal 161 are arranged on the opposite sides of the protrusion 152d in the third direction D3, thereby increasing the sealing area of the connection of the first casing 101 and the cover 151 and the connection of the second casing 121 and the cover 151, and thereby helping to improve the sealing of the first casing 101 and the cover 151 and the sealing of the second casing 121 and the cover 151. Thus, the embodiments of the present application can solve the problem of unreliable sealing at the connection of the motor controller and the first casing 101 and the second casing 121 adjacent to the connection of the motor controller and the first casing 101.

[0075] The motor assembly 200 of the present application will be further described below with the example of the assembly and connection of the first casing 101, the second casing 121 and the cover 151. In the following embodiments, the structure of the first casing 101 is the same as the structure of the second casing 121. Moreover, the first sealing part 103 and the second sealing part 123 comprise or are configured as grooves 104, and the third sealing part 152 comprises or is configured as a protrusion 152d.

[0076] For example, the first seal 161 can be a sealant. In the production process, the liquid or semi-liquid sealant is applied into the groove 104, and during the process of inserting the protrusion into the groove 104, the sealant flows and distributes between the groove wall of the groove 104 and the surface of the protrusion opposite in the third direction D3, and finally, the sealant solidifies and maintains the corresponding shape.

[0077] Alternatively, the first seal 161 can adopt a seal material with good fluidity such as 988 molding glue.

[0078] Alternatively, the first seal 161 can adopt a seal structure made of a metal-coated gasket and other pre-formed materials.

[0079] Referring to FIG. 12, for example, the first sealing portion 103 can include a bottom surface 103a, a first groove side surface 103b, and a second groove side surface 103c. The first groove side surface 103b and the second groove side surface 103c are oppositely arranged along the third direction D3. The bottom surface 103a is connected to the first groove side surface 103b and the second groove side surface 103c to enclose the groove 104. The protrusion 152d can include a top surface 152a, a first protrusion side surface 152b, and a second protrusion side surface 152c. The first protrusion side surface 152b and the second protrusion side surface 152c are oppositely arranged along the third direction D3. The top surface 152a is connected to the first protrusion side surface 152b and the second protrusion side surface 152c to form the protrusion 152d. In a state where the protrusion 152d is inserted in the groove 104, the first sealing layer 161a of the first seal 161 is provided between the first groove side surface 103b and the first protrusion side surface 152b. The second sealing layer 161b of the first seal 161 is provided between the second groove side surface 103c and the second protrusion side surface 152c. Thus, a seal is formed between the protrusion 152d and the groove 104 by the first sealing layer 161a and the second sealing layer 161b of the first seal 161, and the sealability can be reliably improved.

[0080] Alternatively, each of the first groove side surface 103b and the second groove side surface 103c can be substantially extended along the first direction D1. In an example where each of the first groove side surface 103b and the second groove side surface 103c is a plane, each of the first groove side surface 103b and the second groove side surface 103c can be parallel to or close to parallel to the first direction D1, and each of the first groove side surface 103b and the second groove side surface 103c can be perpendicular to or close to perpendicular to the third direction D3. For example, the bottom surface 103a can be perpendicular to or close to perpendicular to the first direction D1.

[0081] Alternatively, each of the first protrusion side surface 152b and the second protrusion side surface 152c can be substantially extended along the first direction D1. In an example where each of the first protrusion side surface 152b and the second protrusion side surface 152c is a plane, each of the first protrusion side surface 152b and the second protrusion side surface 152c can be parallel to or close to parallel to the first direction D1, and each of the first protrusion side surface 152b and the second protrusion side surface 152c can be perpendicular to or close to perpendicular to the third direction D3. For example, the top surface 152a can be perpendicular to or close to perpendicular to the first direction D1.

[0082] Alternatively, any one of the bottom surface 103a, the first groove side surface 103b, the second groove side surface 103c, the top surface 152a, the first protrusion side surface 152b, and the second protrusion side surface 152c can be a plane, a curved surface, a special-shaped surface, a surface of any combination thereof, other forms of surfaces, etc.

[0083] In the embodiment, the connection between the bottom surface 103a and the first recessed side surface 103b and the connection between the bottom surface 103a and the second recessed side surface 103c can adopt a structure of smooth transition such as chamfer, round chamfer, etc. It can be understood that the connection between the bottom surface 103a and the first recessed side surface 103b and the connection between the bottom surface 103a and the second recessed side surface 103c can also be a structure of straight angle, acute angle, obtuse angle, etc.

[0084] In the embodiment, the connection between the top surface 152a and the first protruding side surface 152b and the connection between the top surface 152a and the second protruding side surface 152c can adopt a structure of smooth transition such as chamfer, round chamfer, etc. It can be understood that the connection between the top surface 152a and the first protruding side surface 152b and the connection between the top surface 152a and the second protruding side surface 152c can also be a structure of straight angle, acute angle, obtuse angle, etc.

[0085] Referring to FIG. 12, in addition, the first sealing member 161 can further include a third sealing layer 161c. The third sealing layer 161c is arranged between the bottom surface 103a and the top surface 152a. In this way, the contact area between the first sealing member 161 and the first sealing portion 103 and the third sealing portion 152 can be further increased, so as to further improve the sealing performance.

[0086] Optionally, when the sealing between the first mounting surface 105 of the first casing 101 and the second mounting surface 153 of the cover 151 is implemented by using other sealing structure different from the first sealing member 161, the third sealing layer 161c can be replaced by the other sealing structure. Similarly, the sealing structure and the connecting structure between the second casing 121 and the cover 151 can be implemented by referring to the sealing structure and the connecting structure between the first casing 101 and the cover 151.

[0087] Further, the first sealing layer 161a, the third sealing layer 161c and the second sealing layer 161b are connected in sequence. In this way, the continuity of the first sealing member 161 between the first sealing portion 103 and the third sealing portion 152 can be improved, so as to further improve the sealing effect.

[0088] Referring to FIGS. 2-5, 8, 9, and 12, for example, the first housing 101 can include a first mounting surface 105 and a first set of partial bosses 106. The first mounting surface 105 herein can be a portion of one end surface of the first housing 101 along the first direction D1, and in particular refers to an edge portion of the end surface. The first mounting surface 105 herein can be a continuous arrangement of a ring of surfaces. The partial bosses 106 project from the first mounting surface 105 along the second direction D2. The first set of partial bosses 106 can include two partial bosses 106 arranged apart along the third direction D3. A groove 104 is formed between the two partial bosses 106. The first seal 103 is configured as the groove 104. The surfaces of the two partial bosses 106 facing each other can each be understood as the first groove side 103b, the second groove side 103c described above. The portion of the first mounting surface 105 between the two partial bosses 106 can be understood as the bottom surface 103a described above.

[0089] Correspondingly, the cover 151 can include a second mounting surface 153 and a first set of partial grooves 154. The second mounting surface 153 is directly or indirectly connected to the first mounting surface 105. The partial grooves 154 are recessed relative to the second mounting surface 153 along the second direction D2. The first set of partial grooves 154 can include two partial grooves 154 arranged apart along the third direction D3. A protrusion 152d is formed between the two partial grooves 154. The third seal 152 is configured as the protrusion 152d. The partial grooves 154 are adapted to accommodate the partial bosses 106.

[0090] By being so arranged, the first seal 161 only needs to be arranged in a range where the partial boss 106 and the partial groove 154 abut, which is conducive to improving the sealing performance of the connection between the adjacent first housing 101 and the cover 151, saving material and processing costs, and simplifying the structure. Moreover, it is also conducive to facilitating the positioning of the housing and the first housing 101 through the cooperation of the partial boss 106 and the partial groove 154. Furthermore, through the cooperation of the partial groove 154 and the partial boss 106, the range of the first seal 161 flowing in the second direction D2 and the third direction D3 can also be limited before the first seal 161 solidifies at the connection between the groove 104 and the protrusion, which is more conducive to the first seal 161 being fully and uniformly distributed at the connection between the groove 104 and the protrusion, thereby saving the amount of glue applied to the first seal 161 and ensuring the neatness of the connection between the groove 104 and the protrusion.

[0091] Optionally, the first housing 101 can include at least two sets of partial bosses 106. The at least two sets of partial bosses 106 can include a first set of partial bosses 106 and a second set of partial bosses 106. The first set of partial bosses 106 and the second set of partial bosses 106 are spaced apart in the third direction D3. For example, the first set of partial bosses 106 and the second set of partial bosses 106 are located at two ends of the first housing 101 in the third direction D3, respectively. The cover 151 can include at least two sets of partial slots 154. The at least two sets of partial slots 154 can include a first set of partial slots 154 and a second set of partial slots 154. The first set of partial slots 154 and the second set of partial slots 154 are spaced apart in the third direction D3. The first set of partial slots 154 and the second set of partial slots 154 are each arranged corresponding to the first set of partial bosses 106 and the second set of partial bosses 106. For example, the first set of partial slots 154 and the second set of partial slots 154 are each located at two ends of the cover 151 in the third direction D3.

[0092] Here, by arranging the at least two sets of partial bosses 106 at two ends of the first housing 101 in the third direction D3, and arranging the at least two sets of partial slots 154 corresponding to the at least two sets of partial bosses 106 in the cover 151, a more comprehensive sealing can be achieved between the first housing 101 and the cover 151, thereby ensuring the reliability of the sealing.

[0093] Referring to FIGS. 1-5, 7, and 8, for example, the first housing 101 and the second housing 121 can each include a connecting lug 107 protruding in the third direction D3. The connecting lug 107 can include a first connecting hole 107a extending in the second direction D2. The first connecting hole 107a is configured to receive a fastening component. The connecting lug 107 of the first housing 101 and the connecting lug 107 of the second housing 121 are arranged opposite to each other in the second direction D2. The connecting lug 107 of the first housing 101 and the connecting lug 107 of the second housing 121 are adapted to connect the fastening component to secure the first housing 101 to the second housing 121. Optionally, the fastening component can include a bolt, a nut, or the like.

[0094] Referring to FIGS. 2, 4-8, 10, and 11, for example, at least one of the first housing 101 and the second housing 121 can include an insertion portion 108. The insertion portion 108 can include a first hole portion 108a and a second hole portion 108b. The first hole portion 108a extends in the second direction D2. The second hole portion 108b is located at an end of the first housing 101 away from the first sealing portion 103 in the first direction D1. The second hole portion 108b extends in the first direction D1. The second hole portion 108b is in communication with the first hole portion 108a. At least one of the first housing 101 and the second housing 121 can include a connecting boss 111. The connecting boss 111 is inserted into the first hole portion 108a. The motor assembly 200 can include a fastener 172. The fastener 172 is at least partially threaded through the second hole portion 108b and fastened to the first housing 101 and the second housing 121. Here, by the cooperation of the insertion portion 108 and the connecting boss 111, and by fastening the connecting boss 111 and the housing 101 with the fastener 172, the fastening structure of the two housings 101 can be increased, thereby improving the stability of the connection structure of the two housings 101.

[0095] Alternatively, the first housing 101 and the second housing 121 each include the insertion portion 108 and the connecting boss 111.

[0096] Continuing to refer to FIGS. 2, 4-8, 10 and 11, for example, the first casing 101 and the second casing 121 each has an axial end surface 102 facing each other in the second direction D2. The connecting boss 111 protrudes from the axial end surface 102. The connecting boss 111 includes a plug hole 111a provided through in the first direction D1. A hole wall of the plug hole 111a away from the axial end surface 102 in the second direction D2 is formed with a first guide surface 111b. The first guide surface 111b gradually increases in distance from the axial end surface 102 in the second direction D2 from a side close to the first sealing portion 103 to a side away from the first sealing portion 103 along the first direction D1. The motor assembly 200 can include a plug 171. The plug 171 is adapted to be plugged into the plug hole 111a. The plug 171 includes a second guide surface 171a adapted to fit against the first guide surface 111b. A fastener 172 fastens the plug 171 to the casing in which the insertion portion 108 is located. Here, the casing in which the insertion portion 108 is located is either the first casing 101 or the second casing 121. During fastening of the plug 171 to the casing in which the insertion portion 108 is located by the fastener 172, due to cooperation of the first guide surface 111b and the second guide surface 171a, an approaching force towards the casing in which the insertion portion 108 is located is applied to the casing in which the connecting boss 111 is located in the second direction D2, and the approaching force gradually increases with increasing insertion depth of the plug 171 in the plug hole 111a. During this process, due to cooperation of the first guide surface 111b and the second guide surface 171a, the casing in which the insertion portion 108 is located is also subjected to an approaching force towards the casing in which the connecting boss 111 is located transmitted via the fastener 172, and the approaching force gradually increases with increasing insertion depth of the plug 171 in the plug hole 111a. After completion of fastening of the plug 171 to the casing in which the insertion portion 108 is located, the connection of the first casing 101 and the second casing 121 is more stable. And due to the approaching force in the second direction D2 always maintained between the first guide surface 111b and the second guide surface 171a, a pre-tightening approaching force is always maintained between the axial end surface 102 of the first casing 101 and the axial end surface 102 of the second casing 121, thereby facilitating to ensure stability of the seal between the axial end surface 102 of the first casing 101 and the axial end surface 102 of the second casing 121.

[0097] Referring to FIGS. 2, 5, 6 and 10, optionally, the first guide surface 111b is inclined to the third direction D3. The second guide surface 171a is inclined to the third direction D3. And the second guide surface 171a is inclined in the same direction as the first guide surface 111b. That is, the first guide surface 111b and the second guide surface 171a are both inclined surfaces inclined to the third direction D3. Compared with curved surfaces or other special-shaped surfaces, the inclined surfaces are easier to manufacture, and are advantageous to reduce complexity and processing difficulty of the structure.

[0098] Referring to FIG. 2, FIG. 7, FIG. 8, FIG. 10 and FIG. 11, for example, the first housing 101 can include a first positioning portion 101b. The first positioning portion 101b corresponds to a side of the insertion hole 111a in any direction perpendicular to the first direction D1. The insertion piece 171 can include a second positioning portion 171c. The second positioning portion 171c is located at a side of the insertion piece 171 in any direction perpendicular to the first direction D1. One of the first positioning portion 101b and the second positioning portion 171c is configured as a positioning groove. The other of the first positioning portion 101b and the second positioning portion 171c is configured as a positioning boss. The positioning boss is inserted into the positioning groove to prevent the insertion piece 171 from moving in the direction perpendicular to the first direction D1. The cooperation between the positioning boss and the positioning groove is a kind of fool-proof design. The purpose and effect of the fool-proof design are clear to those skilled in the art, and will not be described here.

[0099] Alternatively, the first positioning portion 101b is a positioning groove. The second positioning portion 171c is a positioning boss. The positioning boss is located at opposite sides of the insertion piece 171 in the third direction D3.

[0100] Further alternatively, the insertion piece 171 can be a wedge-shaped block. The insertion piece 171 is provided with a second connecting hole 171b through which the fastener 172 passes. On the housing provided with the insertion portion 108, the housing is provided with a third connecting hole 101c extending in the first direction D1 at a position corresponding to the second hole portion 108b. The fastener 172 passes through the second connecting hole 171b of the insertion piece 171 and is fastened to the third connecting hole 101c.

[0101] As shown in FIG. 6 and FIG. 8, alternatively, the fastener 172 is a bolt. The second connecting hole 171b is a smooth hole. The third connecting hole 101c is a threaded hole. By converting the axial tightening force of the bolt into a pushing force in the second direction D2, the envelope size of the combination of the first housing 101 and the second housing 121 in the second direction D2 is effectively reduced.

[0102] Alternatively, the dimension of the first sealing portion 103 in the second direction D2 is less than or equal to the dimension of the first housing 101 in the second direction D2. The dimension of the second sealing portion 123 in the second direction D2 is less than or equal to the dimension of the second housing 121 in the second direction D2. Correspondingly, the dimension of the third sealing portion 152 in the second direction D2 is less than or equal to the dimension of the cover 151 in the second direction D2.

[0103] Referring to FIGS. 2, 5, and 6, for example, the first housing 101 and the second housing 121 each have an axial end surface 102 facing each other in the second direction D2. The motor assembly 200 can further include a second seal 162. The second seal 162 is attached between the axial end surface 102 of the first housing 101 and the axial end surface 102 of the second housing 121. By providing the second seal 162, the sealability between the axial end surface 102 of the first housing 101 and the axial end surface 102 of the second housing 121 can be improved.

[0104] Alternatively, the second seal 162 can be formed of a preformed material such as a seal gasket, a seal washer, a metal-coated gasket, or the like. Alternatively, the second seal 162 can be formed by applying a seal material having a good flowability and then curing the seal material.

[0105] Referring to FIGS. 9 and 12, the cover 151 can include a flange 155. The flange 155 extends in the circumferential direction of the cover 151 and extends in the first direction D1 toward the center of the first housing 101 so as to partially shield the side surface of the first housing 101. In a plane perpendicular to the first direction D1, the flange 155 is located outside the first housing 101. In a plane perpendicular to the third direction D3, the flange 155 has a projection that at least partially overlaps the projection of the first housing 101. By providing the flange 155, the relative positions of the cover 151 and the first housing 101 and the relative positions of the cover 151 and the second housing 121 can be easily positioned during assembly. Furthermore, the flange 155 can shield the connection portions of the cover 151 and the first housing 101 and the connection portions of the cover 151 and the second housing 121 to some extent.

[0106] In the example shown in the drawings, the end portion of the first housing 101 in the second direction D2 toward the second housing 121 has a first receiving portion 101a. The end portion of the second housing 121 in the second direction D2 toward the first housing 101 has a second receiving portion 121a. The first receiving portion 101a and the second receiving portion 121a are virtual bodies. The first receiving portion 101a and the second receiving portion 121a communicate with each other, thereby forming a receiving groove 131 at the connection portion of the first housing 101 and the second housing 121. The receiving groove 131 is adapted to receive at least an electric component such as a capacitor.

[0107] Compared with the related art, in addition to the sealing structure arranged between the axial end surface 102 of the first casing 101 and the axial end surface 102 of the second casing 121, between the first casing 101 and the cover 151, and between the second casing 121 and the cover 151, the embodiment of the application further increases the sealing area of the joint part of the first casing 101, the second casing 121 and the cover 151 by the cooperation of the first sealing part 103 and the second sealing part 123 with the third sealing part 152 respectively, thereby enhancing the sealing performance of the joint part of the first casing 101, the second casing 121 and the cover 151. Thus, the embodiment of the application can solve the problem of unreliable sealing due to the different sealing of the joint part between the electric control casing and the casing 101 and the joint part of the adjacent casing 101.

[0108] Referring to FIGS. 1 to 13, the application further provides a hydraulic energy supply device 300. The hydraulic energy supply device 300 can include the motor assembly 200 described above.

[0109] According to the hydraulic energy supply device 300 of the application, by applying the motor assembly 200 described above, the sealing performance of the hydraulic energy supply device 300 can be effectively improved.

[0110] In addition, the hydraulic energy supply device 300 can further include a first hydraulic pump 181 and a second hydraulic pump 182 arranged opposite in the second direction D2. The motor assembly 200 can include a first motor 100 and a second motor 120. The first motor 100 and the second motor 120 are arranged opposite in the second direction D2 and connected. The first hydraulic pump 181 is connected to the end of the first motor 100 away from the second motor 120 in the second direction D2, so as to be driven by the first motor 100. The second hydraulic pump 182 is connected to the end of the second motor 120 away from the first motor 100 in the second direction D2, so as to be driven by the second motor 120.

[0111] Optionally, the hydraulic energy supply device 300 can further include two cantilever assemblies 190. One of the two cantilever assemblies 190 is connected to the end of the first hydraulic pump 181 away from the first motor 100. The other of the two cantilever assemblies 190 is connected to the end of the second hydraulic pump 182 away from the second motor 120. The cantilever assembly 190 is used to be connected to the chassis of the vehicle 1000.

[0112] For example, the hydraulic energy supply device 300 can include a motor controller 150. The motor controller 150 can include the cover 151 described above.

[0113] Referring to FIG. 14, the application further provides a chassis system 400. The chassis system 400 can include a shock absorber and the hydraulic energy supply device 300 described above. The hydraulic energy supply device 300 is in fluid communication with the shock absorber.

[0114] According to the chassis system 400 of the application, by applying the hydraulic energy supply device 300 described above, the stability of the damping performance of the chassis system 400 can be improved.

[0115] Referring to FIGS. 15-17, the application further provides a vehicle 1000. As shown in FIG. 15, the vehicle 1000 can include the motor assembly 200 described above, or as shown in FIG. 16, the vehicle 1000 can include the hydraulic energy supply device 300 described above, or as shown in FIG. 17, the vehicle 1000 can include the chassis system 400 described above.

[0116] According to the vehicle 1000 of the application, by applying the motor assembly 200 described above, or the hydraulic energy supply device 300 described above, or the chassis system 400 described above, the stability of the performance of the vehicle 1000 can be improved, thereby facilitating the user to obtain a better use experience.

[0117] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0118] As referred to herein, "one embodiment", "an embodiment", or "one or more embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Moreover, the appearances of the phrase "in one embodiment" in various places in this specification are not necessarily referring to the same embodiment.

[0119] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of this specification.

[0120] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word comprising does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices, apparatuses or means can be listed, comprising means for carrying out a certain task. The use of the term "means" does not limit the scope of the claim to only a device or apparatus. The word "comprising" does not exclude other elements or steps than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices, apparatuses or means can be listed, comprising means for carrying out a certain task. The use of the term "means" does not limit the scope of the claim to only a device or apparatus. The word "first", "second", "third", etc. does not necessarily indicate any order or precedence. The use of such terms is solely for the purpose of naming different elements.

[0121] Finally, it should be noted that the above-mentioned embodiments are merely intended for describing and illustrating, not limiting the technical solutions of the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric machine assembly (200), characterized by, The motor assembly (200) comprises: a first housing (101), an end of the first housing (101) in a first direction (D1) is provided with a first sealing part (103), the first sealing part (103) extends along a second direction (D2), the first direction (D1) intersects with the second direction (D2); a second housing (121), the second housing (121) and the first housing (101) are opposite and connected in the second direction (D2), an end of the second housing (121) in the first direction (D1) is provided with a second sealing part (123), the second sealing part (123) extends along the second direction (D2), the second sealing part (123) and the first sealing part (103) are located at the ends of the second housing (121) and the first housing (101) close to each other; a cover (151), the cover (151) is connected to the same side of the first housing (101) and the second housing (121) in the first direction (D1), the cover (151) comprises a third sealing part (152), wherein the first sealing part (103) and the second sealing part (123) comprise a groove (104) or a protrusion (152d), the third sealing part (152) comprises a protrusion (152d) or a groove (104), the protrusion (152d) is adapted to be inserted into the groove (104); and a first sealing member (161), the first sealing member (161) is connected between the first sealing part (103) and the third sealing part (152), and between the second sealing part (123) and the third sealing part (152), the first sealing member (161) comprises a first sealing layer (161a) and a second sealing layer (161b), the first sealing layer (161a) and the second sealing layer (161b) are respectively arranged on opposite sides of the protrusion (152d) in a third direction (D3), the third direction (D3) intersects with the first direction (D1) and the second direction (D2) two by two.

2. The electric machine assembly (200) of claim 1, wherein, The groove comprises a bottom surface (103a), a first groove side (103b) and a second groove side (103c), the first groove side (103b) and the second groove side (103c) are oppositely arranged in the third direction (D3), the bottom surface (103a) is connected to the first groove side (103b) and the second groove side (103c); The protrusion comprises a top surface (152a), a first protrusion side (152b) and a second protrusion side (152c), the first protrusion side (152b) and the second protrusion side (152c) are oppositely arranged in the third direction (D3), the top surface (152a) is connected to the first protrusion side (152b) and the second protrusion side (152c); The first sealing layer (161a) is arranged between the first groove side (103b) and the first protrusion side (152b), and the second sealing layer (161b) is arranged between the second groove side (103c) and the second protrusion side (152c).

3. The electric machine assembly (200) of claim 2, characterized in that The first sealing member (161) further comprises a third sealing layer (161c) arranged between the bottom surface (103a) and the top surface (152a).

4. The electric machine assembly (200) of claim 3, characterized in that The first sealing layer (161a), the third sealing layer (161c) and the second sealing layer (161b) are sequentially connected.

5. The electric machine assembly (200) of claim 1, wherein, The first housing (101) comprises a first mounting surface (105) and a first set of partial bosses (106), the partial bosses (106) protrude from the first mounting surface (105) along the first direction (D1), the first set of partial bosses (106) comprises two partial bosses (106) arranged at intervals in the third direction (D3), the recess (104) is formed between the two partial bosses (106) of the first set of partial bosses (106), and the first sealing part (103) is configured as the recess (104); The cover (151) comprises a second mounting surface (153) and a first partial groove (154), the second mounting surface (153) is directly or indirectly connected to the first mounting surface (105), the partial groove (154) is recessed relative to the second mounting surface (153) along the second direction (D2), the first set of partial grooves (154) comprises two partial grooves (154) arranged at intervals in the third direction (D3), the protrusion is formed between the two partial grooves (154), the third sealing part (152) is configured as the protrusion (152d), and the partial groove (154) is adapted to accommodate the partial boss (106).

6. The electric machine assembly (200) of claim 1, wherein, The first housing (101) comprises a first mounting surface (105) and the recess, the recess is recessed relative to the first mounting surface (105) along the first direction (D1); The cover (151) comprises a second mounting surface (153) and the protrusion, the second mounting surface (153) is directly or indirectly connected to the first mounting surface (105), and the protrusion is protruded relative to the second mounting surface (153) along the second direction (D2).

7. The electric machine assembly (200) of claim 1, wherein, The cover (151) comprises a stop edge (155), the stop edge (155) is located at an end of the cover (151) close to the first housing (101) in the first direction (D1); In a plane perpendicular to the first direction (D1), the orthographic projection of the stop edge (155) is located outside the orthographic projection of the first housing (101), and in a plane perpendicular to the third direction (D3), the orthographic projection of the stop edge (155) at least partially overlaps the orthographic projection of the first housing (101).

8. The electric machine assembly (200) of claim 1, wherein, The first casing (101) and the second casing (121) each include a connecting lug (107) protruding in the third direction (D3), the connecting lug (107) including a first connecting hole (107a) penetrating in the second direction (D2); The connecting lug (107) located at the first casing (101) and the connecting lug (107) located at the second casing (121) are oppositely arranged in the second direction (D2), the connecting lug (107) located at the first casing (101) and the connecting lug (107) located at the second casing (121) are adapted to connect a fastening assembly to fasten the first casing (101) to the second casing (121).

9. The electric machine assembly (200) of claim 1, wherein, At least one of the first casing (101) and the second casing (121) is provided with an insertion portion, the insertion portion including a first hole portion (108a) extending in the second direction (D2) and a second hole portion (108b) located at an end of the first casing (101) away from the first sealing portion (103) in the first direction (D1), the second hole portion (108b) extending in the first direction (D1) and communicating with the first hole portion (108a); At least one of the first casing (101) and the second casing (121) is provided with a connecting boss (111) extending in the second direction (D2), the connecting boss (111) being inserted into the first hole portion (108a); The motor assembly (200) includes a fastener (172) at least partially penetrating the second hole portion (108b) and being fastened to the first casing (101) and the second casing (121).

10. The electric machine assembly (200) of claim 9, characterized by The first casing (101) and the second casing (121) each have an axial end surface (102) facing each other in the second direction (D2); The connecting boss (111) protrudes from the axial end surface (102), the connecting boss (111) including an insertion hole (111a) penetrating in the first direction (D1), a hole wall of the insertion hole (111a) away from the axial end surface (102) in the second direction (D2) forming a first guide surface (111b), the distance between the first guide surface (111b) and the axial end surface (102) gradually increasing from the side close to the first sealing portion (103) to the side away from the first sealing portion (103) in the first direction (D1); The motor assembly (200) includes an insertion piece (171) adapted to be inserted into the insertion hole (111a), the insertion piece (171) including a second guide surface (171a) adapted to be fitted to the first guide surface (111b). The fastener (172) is fastened to the plug-in member (171) and the first casing (101) or the second casing (121).

11. The electric machine assembly (200) of claim 10, characterized by The first guide surface (111b) is inclined to the third direction (D3); The second guide surface (171a) is inclined to the third direction (D3), and the inclination direction of the second guide surface (171a) is the same as that of the first guide surface (111b).

12. The electric machine assembly (200) of claim 10, wherein, The first casing (101) comprises a first positioning portion (101b) arranged on the side of the plug-in hole (111a); The plug-in member (171) comprises a second positioning portion (171c) arranged on the side of the plug-in member (171); One of the first positioning portion (101b) and the second positioning portion (171c) is configured as a positioning groove, and the other is configured as a positioning boss which is inserted into the positioning groove.

13. The electric machine assembly (200) of claims 1-1 1, characterized by, The first casing (101) and the second casing (121) each have an axial end surface (102) facing each other in the second direction (D2); The motor assembly (200) further comprises a second seal (162) connected between the axial end surface (102) of the first casing (101) and the axial end surface (102) of the second casing (121).

14. The electric machine assembly (200) according to any one of claims 1 to 13, characterized in that, The first casing (101) and the second casing (121) are the same.

15. A hydraulic energy supply device (300), characterized in that The hydraulic power supply device (300) comprises the motor assembly (200) according to any one of claims 1 to 14.

16. The hydraulic energy supply device (300) according to claim 15, characterized in that The hydraulic power supply device (300) further comprises a first hydraulic pump (181) and a second hydraulic pump (182) arranged oppositely in the second direction (D2), and the motor assembly (200) comprises a first motor (100) and a second motor (120) arranged oppositely and connected in the second direction (D2), the first hydraulic pump (181) is connected to the end of the first motor (100) away from the second motor (120) in the second direction (D2), so as to be suitable for driving the first hydraulic pump (181) by the first motor (100), and the second hydraulic pump (182) is connected to the end of the second motor (120) away from the first motor (100) in the second direction (D2), so as to be suitable for driving the second hydraulic pump (182) by the second motor (120).

17. A chassis system (400) characterized by The chassis system (400) comprises a shock absorber and the hydraulic power supply device (300) according to claim 15 or 16, which is in fluid communication with the shock absorber.

18. A vehicle (1000), characterized in that The vehicle (1000) comprises the electric machine assembly (200) of any one of claims 1 to 14, or the hydraulic power supply device (300) of claim 15 or 16, or the chassis system (400) of claim 17.

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