CN218407702U

CN218407702U - Pump device and vehicle

Info

Publication number: CN218407702U
Application number: CN202221917363.8U
Authority: CN
Inventors: 徐俊; 樊荣; 化豪爽
Original assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Current assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-01-31
Anticipated expiration: 2032-07-25

Abstract

The utility model provides a pump unit and vehicle, wherein, the pump unit includes: a housing; the shell is provided with an opening, the end cover is covered on the opening, the end cover and the shell enclose to form an inner cavity, and the shell comprises a metal shell and/or the end cover comprises a metal end cover; the stator assembly and the rotor assembly are positioned in the inner cavity and are opposite to each other along the radial direction; the controller comprises a circuit board and an insulating coating, wherein one part of the circuit board is exposed out of the insulating coating, and the shell and the end cover clamp the part of the circuit board exposed out of the insulating coating. Because the shell and/or the end cover are in the grounding state, the circuit board is also in the grounding state, so that the charge accumulation is not easy to occur during the operation of the controller, and the safety during the operation of the controller is improved.

Description

Pump device and vehicle

Technical Field

The utility model discloses electron oil pump technical field particularly, relates to a pump unit and vehicle.

Background

The controller in the oil pump is used as a component consisting of electronic components, charge accumulation is inevitable in the use process, when the charge accumulated by the controller is large, a potential difference is formed between the shell and the controller, and if instantaneous discharge occurs, the electronic components are damaged or a human body is injured.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art or the correlation technique.

In view of this, the first aspect of the present invention provides a pump device, including: a housing; the shell is provided with an opening, the end cover is covered on the opening, the end cover and the shell enclose to form an inner cavity, and the shell comprises a metal shell and/or the end cover comprises a metal end cover; the stator assembly and the rotor assembly are positioned in the inner cavity and are opposite to each other along the radial direction; the controller comprises a circuit board and an insulating coating, wherein one part of the circuit board is exposed out of the insulating coating, and the shell and the end cover clamp the part of the circuit board exposed out of the insulating coating.

The utility model provides a pump unit, stator module and rotor subassembly are located the inner chamber, in order to guarantee pump unit's steady operation, need with pump unit ground connection, can guarantee to use pump unit's staff's safety and play the guard action to pump unit itself. In particular, the housing comprises a metal housing and/or the end cap comprises a metal end cap, so that the housing and/or the end cap can be grounded.

The controller comprises a circuit board and an insulating coating, wherein the insulating coating covers the surface of the circuit board. The insulating coating can serve as an insulator, and in order to ground the circuit board, the controller needs to be subjected to a windowing process, namely, a part of the insulating coating on the surface of the circuit board is removed, so that a part of structures on the circuit board is not covered by the insulating coating. A part of the circuit board exposed out of the insulating coating is clamped by the shell and the end cover, and the shell and/or the end cover are in a grounding state, so that the circuit board is also in a grounding state, charge accumulation is not easy to occur when the controller operates, the safety of the controller during operation is improved, and damage to electric appliance components and workers is avoided.

The end cover and the shell clamp the circuit board, an additional locking piece is not needed to lock the controller, and the number of parts is reduced. And structures such as locking holes do not need to be machined and formed on the controller, so that the structure of the controller is prevented from being damaged. Because shell and end cover centre gripping circuit board, consequently shell and end cover all with the circuit board contact, can realize the ground function steadily.

In one possible application, the end cap is removably attached to the housing, and the end cap can be removed from the housing to facilitate replacement or maintenance of components within the housing. The end cap is secured to the housing, for example, by fasteners such as screws.

In addition, according to the utility model provides a pump device among the above-mentioned technical scheme, can also have following additional technical characteristics:

in any of the above technical solutions, the housing and/or the end cap is provided with a groove, and a part of the circuit board exposed out of the insulating coating extends into the groove.

In this solution, a groove is formed in the housing and/or the end cap, and a portion of the circuit board exposed from the insulating coating needs to be inserted into the groove. The recess provides installation space for the circuit board, and when end cover and shell assembled mutually, the recess provided accommodation space for the circuit board, avoids shell and end cover to cause the damage to the circuit board.

In one possible application, the length of the groove is the same as the thickness of a part of the circuit board exposed out of the insulating coating along the axial direction of the pump device, so that the part of the circuit board exposed out of the insulating coating can be attached to the shell and the end cover, and the part of the circuit board exposed out of the insulating coating can be prevented from being damaged.

In any of the above technical solutions, the groove is provided in the housing, and the depth of the groove is smaller than the wall thickness of the housing in the radial direction of the pump device; the end cover is provided with a groove, and the depth of the groove is smaller than the wall thickness of the end cover along the radial direction of the pump device.

In this solution, when the groove is provided in the housing, the groove does not penetrate the housing in the radial direction of the pump device, since the depth of the groove is smaller than the wall thickness of the housing. Along the radial of pump unit, the shell can play limiting displacement to the circuit board, avoids circuit board and shell separation, is favorable to improving the connection stability of controller and shell.

In a similar way, under the condition that the groove is formed in the end cover, the depth of the groove is smaller than the thickness of the end cover, and the controller can be limited.

In any of the above technical solutions, the depth of the groove is L1, and the wall thickness of the housing and the end cap is L2; the groove is arranged on the shell, and along the radial direction of the pump device, L1 is not more than 0.5L2; the groove is arranged on the end cover, and along the radial direction of the pump device, L1 is not less than 0.5L2.

In the technical scheme, the grooves are arranged on the shell for illustration, the depth L1 of the grooves, the wall thickness L2 of the shell, L1 is not more than 0.5L2, the depth of the grooves is less than half of the thickness of the shell, the grooves are prevented from being formed too deeply, the structure of the shell can be prevented from being damaged, and the structural stability of the shell is ensured. The same applies to the case where the groove is provided in the end cap.

In any of the above solutions, the circumferential side wall of the controller is in contact with the side wall of the groove to restrict the controller from moving in the radial direction of the pump device.

In this technical scheme, the circumference lateral wall of controller contacts with the lateral wall of recess, and the lateral wall of recess plays limiting displacement to the controller to avoid partly of controller to slide in the recess, be favorable to improving the assembly stability of controller.

Because the controller is difficult to rock, the electronic devices in the controller are difficult to damage, and the operation stability of the controller is improved.

In any of the above solutions, the pump device further comprises: the supporting part is arranged on the end cover, is in contact with the controller and is used for supporting the controller.

In this technical scheme, be provided with the supporting part on the end cover, the supporting part contacts with the controller, and the supporting part plays the effect that supports to the controller, avoids the structure of controller to receive destruction.

Specifically, the edge of the controller extends into the groove, and the middle structure of the controller is in a suspended state. During operation of the pump device, operational vibration of the pump device can cause the controller to vibrate, and the container in the middle area of the controller breaks. The supporting part on the design end cover supports the controller in this scheme for the middle part region of controller receives the supporting role of supporting part, and the difficult fracture that takes place of controller guarantees the structural stability of controller, and the difficult fracture that takes place of controller, thereby can improve the stability when pump unit moves.

In a possible application, the number of the supporting parts can be one or more, and a plurality of the supporting parts are distributed at intervals, so that the supporting stability of the controller is further improved.

In any of the above solutions, a portion of the circuit board exposed to the insulating coating includes: the first exposed part is contacted with the shell and the end cover, and an electrical element in the controller avoids the first exposed part; the support portion includes: the heat dissipation glue and the heat conduction portion, the second exposed portion is covered by the heat dissipation glue, and the heat dissipation glue and the end cover are connected to the two ends of the heat conduction portion respectively.

In the technical scheme, the first exposed part and the second exposed part are exposed out of the insulating coating, wherein the first exposed part is in contact with the shell and the end cover, and the electrical component in the controller avoids the first exposed part, so that the first exposed part only can realize a grounding function, the controller cannot be short-circuited, and the operation stability of the controller is improved.

The second exposed part is in contact with the supporting part, specifically, the supporting part is composed of a heat dissipation adhesive and a heat conduction part, and the heat conduction part is made of a heat conduction material, so that the heat conduction part has better heat conduction performance. In the controller operation process, the controller can produce more heat, and the heat that the controller produced can run off through the heat-conducting part to the realization is to the cooling function of controller, guarantees the operating stability of controller.

Because the heat conduction portion has better heat conductivility, the heat conduction portion is made by metal material usually, in order to avoid the controller to take place the problem of opening circuit, sets up the heat dissipation glue between heat conduction portion and the second outside exposure, and the heat dissipation glue has insulating function to avoid the second outside exposure to be connected with the heat conduction portion electricity. In addition, the heat dissipation glue also has better heat conductivity, and the heat generated by the controller can be lost through the heat dissipation glue and the heat conducting part.

In any of the above technical solutions, the housing is provided with a mounting port; the pump device further comprises: the wiring terminal is electrically connected with the controller; the mounting piece is connected with the shell and covers the mounting opening, and the wiring terminal is arranged on the mounting piece; a seal between the mount and the housing.

In this technical scheme, be provided with the installing port on the shell, the installed part can be connected with the shell and cover the installing port, and binding post installs on the installed part, and binding post can pass and stretch into the inner chamber behind the installing port, and binding post is connected with the controller electricity, and binding post can also be connected with power supply portion to realize the power supply for the controller.

The installed part can cover the installation opening, and sundries are prevented from entering the inner cavity through the installation opening. Be provided with the sealing member between installed part and shell, the sealing member can be to playing sealed effect between installed part and the shell, avoids during aqueous vapor passes through to get into the inner chamber between installed part and the shell, is favorable to improving the sealing performance of shell, and the controller is difficult for receiving the corruption of aqueous vapor, ensures the functional stability of controller.

In one possible application, the mounting member is removably attached to the housing, and maintenance can be performed on the interior of the housing by removing the mounting member. The mounting member is secured to the housing, for example, by a locking member such as a screw.

In one possible application, the seal may be a rubber or silicone piece.

In any of the above technical solutions, the housing is provided with a mounting groove, a part of the sealing member is located in the mounting groove, and the mounting groove limits the separation of the sealing member from the housing.

In this technical scheme, machine-shaping has the mounting groove on the shell, and the sealing member holds in the mounting groove, and the seal groove plays limiting displacement to the sealing member, avoids the relative shell of sealing member to remove, prevents sealing member and shell separation to ensure that the sealing member can play sealed effect steadily between shell and the installed part.

In a second aspect, the present invention provides a vehicle, including the pump device according to the above technical solution, therefore the present invention provides a vehicle having all the advantageous effects of the pump device provided in the above technical solution.

The vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy automobile comprises a pure electric automobile, a range-extended electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a pump device in an embodiment of the invention;

fig. 2 shows a schematic structural diagram of a controller in an embodiment of the present invention;

fig. 3 shows a partial view of the housing, end cap, and controller in an embodiment of the invention;

fig. 4 shows a partial view of the housing, seal and mounting in an embodiment of the invention;

fig. 5 shows a schematic structural diagram of an electric power steering system according to an embodiment of the present invention. Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:

110 housing, 120 end cap, 200 controller, 210 circuit board, 220 insulation coating, 300 grooves, 311 supporting part, 312 terminals, 600 mounting part, 700 sealing part, 800 mounting groove, 400 electric power steering system, 411 steering wheel, 412 steering shaft, 413 universal joint, 414 rotating shaft, 415 rack and pinion mechanism, 416 rack shaft, 417 steering wheel, 421 steering torque sensor, 422 control unit, 423 speed reducing mechanism, 500 pump device.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Pump arrangements and vehicles provided in accordance with some embodiments of the present invention are described below with reference to fig. 1-5.

In an embodiment of the present invention, as shown in fig. 1 and 2, a pump device is provided, including: housing 110, end cap 120, stator assembly, rotor assembly, and controller 200. The housing 110 has an opening, the end cap 120 covers the opening, the end cap 120 and the housing 110 enclose an inner cavity, the housing 110 comprises a metal housing and/or the end cap 120 comprises a metal end cap. The stator assembly and the rotor assembly are positioned within the inner cavity, the stator assembly and the rotor assembly being diametrically opposed. The controller 200 includes a circuit board 210 and an insulating coating 220, a portion of the circuit board 210 is exposed out of the insulating coating 220, and the housing 110 and the end cap 120 clamp the portion of the circuit board 210 exposed out of the insulating coating 220.

The pump unit that this embodiment provided, stator module and rotor subassembly are located the inner chamber, in order to guarantee the steady operation of pump unit, need with pump unit ground connection, can guarantee the staff's that uses pump unit safety and play the guard action to pump unit itself. Specifically, the housing 110 includes a metal housing and/or the end cap 120 includes a metal end cap, and thus the housing 110 and/or the end cap 120 may be grounded.

The controller 200 includes a circuit board 210 and an insulating coating 220, wherein the insulating coating 220 can perform an insulating function, and in order to ground the circuit board 210, the controller 200 needs to be "windowed", that is, a part of the insulating coating on the surface of the circuit board 210 is removed, so that a part of the structure on the circuit board 210 is not covered by the insulating coating. A part of the circuit board 210 exposed on the insulating coating 220 is clamped by the shell 110 and the end cover 120, and since the shell 110 and/or the end cover 120 are in a grounding state, the circuit board 210 is also in a grounding state, so that charge accumulation is not easy to occur during the operation of the controller 200, thereby being beneficial to improving the safety during the operation of the controller 200 and avoiding causing damage to electrical components and workers.

The cover 120 and the housing 110 hold the circuit board 210, and no additional locking member is required to lock the controller 200, thereby reducing the number of parts. And, need not process structures such as shaping locking hole on controller 200, avoid causing the destruction to the structure of controller 200. Since the housing 110 and the cap 120 clamp the circuit board 210, both the housing 110 and the cap 120 are in contact with the circuit board 210, and a grounding function can be stably achieved.

In one possible application, the end cap 120 is removably attached to the housing 110, and the end cap 120 may be removed from the housing 110 to facilitate replacement or maintenance of components inside the housing 110. End cap 120 is secured to housing 110, for example, by fasteners such as screws.

In any of the above embodiments, as shown in fig. 1 and 3, the housing 110 and/or the end cap 120 is provided with a groove 300, and a portion of the circuit board 210 exposed by the insulating coating 220 extends into the groove 300.

In this embodiment, the recess 300 is formed in the housing 110 and/or the end cap 120, and a portion of the circuit board 210 exposed by the insulating coating 220 is inserted into the recess 300. The groove 300 provides a mounting space for the circuit board 210, and when the end cap 120 and the shell 110 are assembled, the groove 300 provides a receiving space for the circuit board 210, so that the shell 110 and the end cap 120 are prevented from damaging the circuit board 210.

In one possible application, the length of the groove 300 is the same as the thickness of a portion of the circuit board 210 exposed on the insulating coating 220 along the axial direction of the pump device, so that the portion of the circuit board 210 exposed on the insulating coating 220 can be attached to the outer shell 110 and the end cap 120, and damage to the portion of the circuit board 210 exposed on the insulating coating 220 can be avoided.

In any of the above embodiments, as shown in fig. 3, based on the groove 300 provided in the outer casing 110, the depth of the groove 300 is smaller than the wall thickness of the outer casing 110 in the radial direction of the pump device; since the groove 300 is provided in the end cap 120, the depth of the groove 300 is smaller than the wall thickness of the end cap 120 in the radial direction of the pump device.

In this embodiment, in the case where the groove 300 is provided on the housing 110, since the depth of the groove 300 is smaller than the wall thickness of the housing 110, the groove 300 does not penetrate the housing 110 in the radial direction of the pump device. Along the radial direction of the pump device, the casing 110 can limit the circuit board 210, so as to prevent the circuit board 210 from being separated from the casing 110, which is beneficial to improving the connection stability of the controller 200 and the casing 110.

Similarly, when the groove 300 is disposed on the end cap 120, the depth of the groove 300 is smaller than the thickness of the end cap 120, and the groove can also limit the controller 200.

In any of the above solutions, the depth of the groove 300 is L1, and the wall thickness of the housing 110 and the end cap 120 is L2; based on the fact that the groove 300 is formed in the shell 110, along the radial direction of the pump device, L1 is not more than 0.5L2; based on the groove 300 arranged on the end cover 120, along the radial direction of the pump device, L1 is not less than 0.5L2.

In the technical scheme, the groove 300 is arranged on the shell 110 for exemplary illustration, the depth L1 of the groove 300, the wall thickness L2 of the shell 110, L1 being not less than 0.5L2, the depth of the groove 300 being less than half of the thickness of the shell 110, and the groove 300 being too deep in opening depth is avoided, so that damage to the structure of the shell 110 can be avoided, and the structural stability of the shell 110 is ensured. The same holds true for the case where the groove 300 is provided on the end cap 120.

In any of the above embodiments, the circumferential side wall of the controller 200 contacts the side wall of the groove 300 to restrict the controller 200 from moving in the radial direction of the pump apparatus.

In this embodiment, the circumferential side wall of the controller 200 is in contact with the side wall of the groove 300, and the side wall of the groove 300 limits the controller 200, so that a part of the controller 200 is prevented from sliding in the groove 300, and the assembly stability of the controller 200 is improved.

Since the controller 200 is not easily shaken, the electronic devices in the controller 200 are not easily damaged, which is beneficial to improving the operation stability of the controller 200.

As shown in fig. 1, in any of the above embodiments, the pump apparatus further comprises: and the supporting part 311 is arranged on the end cover 120, the supporting part 311 is in contact with the controller 200, and the supporting part 311 is used for supporting the controller 200.

In this embodiment, the end cap 120 is provided with a supporting portion 311, the supporting portion 311 contacts with the controller 200, and the supporting portion 311 supports the controller 200 to prevent the structure of the controller 200 from being damaged.

Specifically, the edge of the controller 200 extends into the recess 300, and the middle structure of the controller 200 is suspended. During operation of the pump assembly, operational vibration of the pump assembly may cause the controller 200 to vibrate and the central region of the controller 200 may break. The supporting part 311 on the design end cover 120 supports the controller 200 in this scheme, so that the middle region of the controller 200 is supported by the supporting part 311, the controller 200 is not easy to break, the structural stability of the controller 200 is ensured, the controller 200 is not easy to break, and the stability of the pump device during operation can be improved.

In one possible application, the number of the supporting portions 311 may be one or more, and the supporting portions 311 are distributed at intervals, so as to further improve the supporting stability of the controller 200.

In any of the above embodiments, as shown in fig. 1 and 2, the portion of the circuit board 210 exposed by the insulating coating 220 includes: a first exposed portion that contacts the housing 110 and the end cap 120, and a second exposed portion that the electrical components in the controller 200 are shielded from. The support portion 311 includes: a heat-dissipating glue covering the second exposed portion and a heat-conducting portion, both ends of which are connected to the heat-dissipating glue and the end cap 120, respectively.

In this embodiment, the first exposed portion and the second exposed portion are exposed to the insulating coating 220, wherein the first exposed portion is in contact with the housing 110 and the end cap 120, and the electrical components in the controller 200 are shielded from the first exposed portion, so that the first exposed portion can only achieve the grounding function, and the controller 200 is not broken, which is beneficial to improving the operation stability of the controller 200.

The second exposed portion is in contact with the supporting portion 311, and specifically, the supporting portion 311 is composed of two parts, namely a heat dissipation adhesive and a heat conduction portion, and the heat conduction portion is made of a heat conduction material, so that the heat conduction portion has a better heat conduction performance. In the operation process of the controller 200, the controller 200 can generate more heat, and the heat generated by the controller 200 can be lost through the heat conduction part, so that the cooling function of the controller 200 is realized, and the operation stability of the controller 200 is ensured.

Because the heat conduction portion has better heat conductivility, the heat conduction portion is usually made by metal material, in order to avoid controller 200 to take place the open circuit problem, sets up the heat dissipation glue between heat conduction portion and second outside exposure portion, and the heat dissipation glue has insulating function to avoid second outside exposure portion and heat conduction portion to be connected electrically. Moreover, the heat-dissipating glue also has good thermal conductivity, and the heat generated by the controller 200 can be lost through the heat-dissipating glue and the heat-conducting portion.

In any of the above embodiments, as shown in fig. 1 and 4, the housing 110 is provided with a mounting port, and the pump apparatus further includes: terminal 312, mount 600, and seal 700. The connection terminal 312 is electrically connected to the controller 200, the mounting member 600 is connected to the housing 110, the mounting member 600 covers the mounting opening, and the connection terminal 312 is provided in the mounting member 600. The seal 700 is located between the mount 600 and the housing 110.

In this embodiment, a mounting opening is formed in the housing 110, the mounting member 600 can be connected to the housing 110 and cover the mounting opening, the connection terminal 312 is mounted on the mounting member 600, the connection terminal 312 can penetrate through the mounting opening and then extend into the inner cavity, the connection terminal 312 is electrically connected to the controller 200, and the connection terminal 312 can also be connected to a power supply portion, so as to supply power to the controller 200.

The mounting member 600 can cover the mounting opening to prevent impurities from entering the inner cavity through the mounting opening. Be provided with sealing member 700 between installed part 600 and shell 110, sealing member 700 can play sealed effect to between installed part 600 and the shell 110, avoids the aqueous vapor to pass through and gets into in the inner chamber between installed part 600 and the shell 110, is favorable to improving the sealing performance of shell 110, and controller 200 is difficult for receiving the corruption of aqueous vapor, ensures controller 200's functional stability.

In one possible application, the mounting member 600 is detachably coupled to the housing 110, and the interior of the housing 110 may be serviced by removing the mounting member 600. Mounting member 600 is secured to housing 110, for example, by fasteners such as screws.

In one possible application, the seal 700 may be a rubber or silicone piece.

In any of the above embodiments, the housing 110 is provided with a mounting groove 800, and a portion of the sealing member 700 is positioned in the mounting groove 800, which restricts the sealing member 700 from being detached from the housing 110.

In this embodiment, the processing shaping has the mounting groove on shell 110, and the sealing member is held in the mounting groove, and the seal groove plays limiting displacement to the sealing member, avoids the relative shell 110 of sealing member to remove, prevents that the sealing member from separating with shell 110 to ensure that the sealing member can play sealed effect steadily between shell 110 and the installed part.

The present embodiment proposes a vehicle including the pump apparatus 500 in any of the above embodiments, and therefore the vehicle provided by the present embodiment has all the advantages of the pump apparatus 500 provided in the above embodiments.

In one possible application, as shown in fig. 5, a vehicle comprises: an Electric Power Steering system 400 (abbreviated as EPS), in which a pump device 500 is used as the Electric Power Steering system 400 in a vehicle, the Electric Power Steering system 400 is an Electric Power Steering system that directly relies on the pump device 500 to provide auxiliary torque Power, and compared with a conventional Hydraulic Power Steering system HPS (Hydraulic Power Steering), the EPS system has a simple structure and is flexible to assemble, and can save energy and protect the environment, and most of the models of modern vehicles are basically equipped with EPS systems.

The electric power steering system 400 includes a variety of implementations. One of the many possible ways is specifically described below. Specifically, in one implementable manner, the EPS system has an electric power steering system and an assist torque mechanism that generates an assist torque. The assist torque assists a steering torque of the electric power steering system generated by the driver operating the steering wheel. The burden of the operation of the driver is reduced by the assist torque.

Specifically, the electric power steering system 400 includes a steering wheel 411, a steering shaft 412, a universal joint 413, a rotating shaft 414, a rack and pinion mechanism 415, a rack shaft 416, left and right steered wheels 417, and the like.

The assist torque mechanism specifically includes a steering torque sensor 421, an electronic control unit 422 for an automobile, a pump device, a speed reduction mechanism 423, and the like. Specifically, the steering torque sensor 421 detects the steering torque of the electric power steering system. The control unit 422 generates a drive signal based on the detection signal of the steering torque sensor 421. The pump device generates an assist torque corresponding to the steering torque in accordance with the drive signal. The pump device transmits the generated assist torque to the electric power steering system via the speed reduction mechanism 423.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pump apparatus, comprising:

a housing;

the shell is provided with an opening, the end cover covers the opening, the end cover and the shell enclose to form an inner cavity, the shell comprises a metal shell and/or the end cover comprises a metal end cover;

a stator assembly and a rotor assembly positioned within the inner cavity, the stator assembly and the rotor assembly being diametrically opposed;

the controller comprises a circuit board and an insulating coating, a part of the circuit board is exposed out of the insulating coating, and the shell and the end cover clamp the part of the circuit board exposed out of the insulating coating.

2. Pump apparatus according to claim 1,

and the shell and/or the end cover is/are provided with a groove, and a part of the circuit board exposed out of the insulating coating extends into the groove.

3. Pump apparatus according to claim 2,

based on the fact that the groove is formed in the shell, the depth of the groove is smaller than the wall thickness of the shell along the radial direction of the pump device;

based on the groove being arranged in the end cap, the depth of the groove is smaller than the wall thickness of the end cap in the radial direction of the pump device.

4. Pump apparatus according to claim 2,

the depth of the groove is L1, and the wall thickness of the shell and the end cover is L2;

based on the groove arranged on the shell, along the radial direction of the pump device, L1 is not more than 0.5L2;

based on the groove is arranged on the end cover, along the radial direction of the pump device, L1 is not more than 0.5L2.

5. Pump apparatus according to claim 2,

the circumferential side wall of the controller is in contact with the side wall of the groove to restrict radial movement of the controller along the pump device.

6. The pump arrangement according to any one of claims 2 to 5, further comprising:

the supporting part is arranged on the end cover, the supporting part is in contact with the controller, and the supporting part is used for supporting the controller.

7. Pump apparatus according to claim 6,

a portion of the circuit board exposed to the insulating coating includes: the first exposed part is in contact with the shell and the end cover, and an electrical element in the controller avoids the first exposed part;

the support portion includes: the heat dissipation glue and the heat conduction part are covered by the heat dissipation glue, and two ends of the heat conduction part are respectively connected with the heat dissipation glue and the end cover.

8. Pump arrangement according to any one of claims 1 to 5,

the shell is provided with a mounting port;

the pump device further includes:

the wiring terminal is electrically connected with the controller;

the mounting piece is connected with the shell and covers the mounting opening, and the wiring terminal is arranged on the mounting piece;

a seal between the mount and the housing.

9. The pump arrangement according to claim 8,

the shell is provided with a mounting groove, one part of the sealing element is positioned in the mounting groove, and the mounting groove limits the separation of the sealing element from the shell.

10. A vehicle, characterized by comprising a pump device according to any one of claims 1 to 9.