Vehicle-mounted pump motor structure

Abstract

The utility model relates to a kind of vehicle-mounted pump motor structures, wherein vehicle-mounted pump motor structure includes cylinder body, the cylinder body has the first end and the second end oppositely arranged along axial direction, the first end of the cylinder body includes first connecting part, the second end of the cylinder body includes second connecting part;Stator installed in the cylinder body, the stator is enclosed to form inner cavity around axial direction;Protective cover, the inner wall of the protective cover is attached the inner wall of the inner cavity setting, the inner wall of at least part of the first end of the protective cover is abutted with the first connecting part, the inner wall of at least part of the second end of the protective cover is abutted with the second connecting part, so that the inner and outer wall of the protective cover is sealed and isolated;Rotor installed in the inner cavity, the outer wall of the rotor and the protective cover have preset gap between it.The utility model can be isolated by protective cover of stator inner wall, and the connecting part of two ends is cooperated to realize complete isolation sealing.

Description

Technical Field

[0001] This utility model relates to a vehicle-mounted motor, and more particularly to a vehicle-mounted pump motor structure. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] With the rapid development of new energy vehicles, the demand for various types of vehicle motors is increasing. Basically, every vehicle will be equipped with 2-5 electronic water pumps, electric oil pumps, and other devices. The characteristic of this type of device is that the medium being compressed and transported flows between the stator and rotor structures of the motor.

[0004] Therefore, the motor structure design must completely isolate the medium from the motor stator to ensure stable operation of the motor over a long period of time; however, existing sealing structures are difficult to meet the above requirements, or the structure is complex and the processing cost is high.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The purpose of this utility model is to provide a vehicle-mounted pump motor structure that can be isolated by a protective cover fitted on the inner wall of the stator, and achieve complete isolation and sealing in conjunction with the connecting parts at both ends.

[0007] To achieve the above objectives, this utility model discloses the following vehicle-mounted pump motor structure, which includes: A cylinder body having a first end and a second end disposed opposite to each other along an axial direction; the first end of the cylinder body includes a first connecting portion, and the second end of the cylinder body includes a second connecting portion. A stator installed in the cylinder body, the stator forming an inner cavity around the axial direction; A protective cover, wherein the outer wall of the protective cover is attached to the inner wall of the inner cavity, at least a portion of the inner wall at the first end of the protective cover abuts against the first connecting portion, and at least a portion of the inner wall at the second end of the protective cover abuts against the second connecting portion, so that the inner and outer walls of the protective cover are sealed and isolated from each other. The rotor is installed in the inner cavity, and there is a preset gap between the outer wall of the rotor and the protective cover.

[0008] As a further description of the above technical solution, the first end of the stator includes a first frame, the second end of the stator includes a second frame, and the first frame and the second frame are connected by a body. The first frame is recessed at the connection point with the body to form a first annular portion, and the second frame is recessed at the connection point with the body to form a second annular portion; The first annular portion is filled with a first supporting and fixing ring, and the second annular portion is filled with a second supporting and fixing ring.

[0009] As a further description of the above technical solution, the outer wall of the first support fixing ring abuts against the first frame, and the inner wall of the first support fixing ring abuts against the outer wall at the first end of the protective cover. The outer wall of the second support fixing ring abuts against the second frame, and the inner wall of the second support fixing ring abuts against the outer wall at the second end of the protective cover.

[0010] As a further description of the above technical solution, a flange is provided at the first end of the protective cover, and the flange is axially fitted with at least a portion of the first support fixing ring and the first skeleton.

[0011] As a further description of the above technical solution, the second end of the protective cover is radially recessed to form a stepped surface, and the stepped surface is axially fitted with at least a portion of the second support fixing ring.

[0012] As a further description of the above technical solution, the protective cover is made of a non-magnetic material.

[0013] As a further description of the above technical solution, the protective cover is made of 304 stainless steel.

[0014] As a further description of the above technical solution, the thickness of the protective cover is set to 0.1~0.5mm.

[0015] As a further description of the above technical solution, a first sealing ring is provided between the inner wall of the first end of the protective cover and the first connecting part.

[0016] As a further description of the above technical solution, a second sealing ring is provided between the inner wall of the second end of the protective cover and the second connecting part.

[0017] Based on the above technical solution, the beneficial effects of this utility model are as follows: The vehicle-mounted pump motor structure of this utility model can achieve complete isolation and sealing through a protective cover fitted onto the inner wall of the stator and the connecting parts at both ends. Specifically, the outer wall of the protective cover fits into the inner wall of the cavity formed by the stator, and the two ends of the protective cover are sealed on both sides through the corresponding connecting structure of the cylinder, so that the inner and outer sides of the protective cover are completely isolated. Furthermore, the barrel-shaped cover design of the protective cover is easy to install and manufacture, and has the advantages of good sealing performance and reasonable cost control.

[0018] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the connection relationship of a vehicle-mounted pump motor structure provided in the embodiments of this specification; Figure 2 This is a side view of a protective cover for a vehicle-mounted pump motor structure provided in the embodiments of this specification; Figure 3 This is a three-dimensional schematic diagram of a protective cover for a vehicle-mounted pump motor structure provided in the embodiments of this specification; Figure 4 This is a general installation diagram of a vehicle-mounted pump motor structure provided in the embodiments of this specification; In the picture: 1. Cylinder block; 11. First connecting part; 12. Second connecting part; 13. Inner cavity; 2. Stator; 21. First frame; 22. Second frame; 23. Body; 24. First annular portion; 25. Second annular portion; 26. First support and fixing ring; 27. Second support and fixing ring; 3. Protective cover; 31. Flange; 32. Stepped surface; 4. Rotor; 5. First sealing ring; 6. Second sealing ring. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0023] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0024] Please see Figure 1-4 This embodiment describes a vehicle-mounted pump motor structure, which includes: The cylinder body 1 has a first end and a second end arranged opposite to each other along the axial direction. The first end of the cylinder body 1 includes a first connecting part 11, and the second end of the cylinder body 1 includes a second connecting part 12. A stator 2 is installed in the cylinder 1, and the stator 2 forms an inner cavity 13 around the axis; The protective cover 3 has its outer wall attached to the inner wall of the inner cavity 13. At least a portion of the inner wall at the first end of the protective cover 3 abuts against the first connecting part 11, and at least a portion of the inner wall at the second end of the protective cover 3 abuts against the second connecting part 12, so that the inner and outer walls of the protective cover 3 are sealed and isolated from each other. The rotor 4 is installed in the inner cavity 13, and there is a preset gap between the outer wall of the rotor 4 and the protective cover 3.

[0025] Based on the above structure, in actual operation, the stator 2 is energized and drives the rotor 4 to rotate axially. The output end of the rotor 4 drives the output shaft connected to the first or second external end to perform work, and the gear and other structures at its end realize power output. During operation, due to the special operating environment of electric water pumps, electric oil pumps, etc., fluid may pass through the internal cavity in the axial direction of the rotor 4, and fluid may also exist in other positions in the inner cavity 13, such as the gap between the stator 2 and the rotor 4. However, due to the isolation provided by the protective cover 3, the fluid in the middle position is blocked. The sealed connection between the two ends and the first connection part 11 and the second connection part 12 of the cylinder 1 blocks the fluid at both ends. Therefore, the sealing effect achieved by this application can be realized in the end.

[0026] In other words, based on the above-described structural scheme of this application, isolation can be achieved by the protective cover 3 fitted onto the inner wall of the stator 2, and complete isolation and sealing can be achieved in conjunction with the connecting parts at both ends. Specifically, the outer wall of the protective cover 3 fits into the inner wall of the cavity 13 formed by the stator 2, and the two ends of the protective cover 3 are sealed on both sides through the corresponding connecting structure of the cylinder 1, so that the inner and outer sides of the protective cover 3 are completely isolated. Furthermore, the barrel-shaped cover design of the protective cover 3 is easy to install and easy to manufacture, and has the advantages of good sealing performance and proper cost control.

[0027] Further, the first end of the stator 2 includes a first frame 21, and the second end of the stator 2 includes a second frame 22. The first frame 21 and the second frame 22 are connected by a body 23. A first annular portion 24 is formed at the connection between the first frame 21 and the body 23, and a second annular portion 25 is formed at the connection between the second frame 22 and the body 23. A first supporting ring 26 is filled and installed in the first annular portion 24, and a second supporting ring 27 is filled and installed in the second annular portion 25. The supporting relationship is as follows: the outer wall of the first supporting ring 26 abuts against the first frame 21, and the inner wall of the first supporting ring 26 abuts against the outer wall of the first end of the protective cover 3; the outer wall of the second supporting ring 27 abuts against the second frame 22, and the inner wall of the second supporting ring 27 abuts against the outer wall of the second end of the protective cover 3. The first frame 21 and the second frame 22 can be configured as an annular structure whose size is smaller than that of the body 23 of the stator 2, allowing for a recess to form a first annular portion 24 for accommodating the first support and fixing ring 26. This structural configuration increases the connection area at the end of the first annular portion 24 where leakage is more likely, thus significantly reducing the possibility of fluid leakage at the location of the first annular portion 24. The second annular portion 25 and the second support and fixing ring 27 are combined in the same manner.

[0028] In terms of specific design, certain distinctions can be made. For example, a flange 31 is provided at the first end of the protective cover 3, and the flange 31 is axially fitted with at least a portion of the first support fixing ring 26 and the first frame 21. The flange 31 covers the corresponding positions of the first support fixing ring 26 and the first frame 21 from the first end to the second end, and can form a large contact surface according to the diameter of the flange 31, thereby reducing the path of fluid leakage and reducing the possibility of leakage.

[0029] In another embodiment, a stepped surface 32 is formed at the second end of the protective cover 3 in a radially recessed manner, and the stepped surface 32 axially abuts against at least a portion of the second support retaining ring 27. A larger second support retaining ring 27 can be installed here, which itself can simultaneously abut against the stepped surface 32 and the stator 2 in the region of the second annular portion 25 along the direction from the second end to the first end, forming a large-area sealing effect with excellent sealing performance.

[0030] Specifically, the protective cover 3 is made of a non-magnetic material, preferably 304 stainless steel in this application. This material is inexpensive, readily available, and has good plasticity. Compared to plastic, it has better temperature resistance and is suitable for high-temperature applications. Meanwhile, the thickness of the protective cover 3 is set to 0.1~0.5mm. While achieving the same sealing performance, its thickness is significantly lower than that of plastic solutions, and the pre-set gap is smaller, minimizing the impact on motor performance.

[0031] In one embodiment, a first sealing ring 5 is provided between the inner wall of the first end of the protective cover 3 and the first connecting portion 11. Similarly, a second sealing ring 6 is provided between the inner wall of the second end of the protective cover 3 and the second connecting portion 12. Specifically, in this embodiment, the first sealing ring 5 and the second sealing ring 6 can actually be configured as multiple rings spaced apart along the axial direction, which can maximize the sealing effect. The first connecting portion 11 can be provided with an annular groove for accommodating the first sealing ring 5, which facilitates the installation of the first sealing ring 5, and the same applies to the second connecting portion 12.

[0032] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0033] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0034] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A vehicle-mounted pump motor structure, characterized in that, The structure of the vehicle-mounted pump motor includes: A cylinder body having a first end and a second end disposed opposite to each other along an axial direction; the first end of the cylinder body includes a first connecting portion, and the second end of the cylinder body includes a second connecting portion. A stator installed in the cylinder body, the stator forming an inner cavity around the axial direction; A protective cover, wherein the outer wall of the protective cover is attached to the inner wall of the inner cavity, at least a portion of the inner wall at the first end of the protective cover abuts against the first connecting portion, and at least a portion of the inner wall at the second end of the protective cover abuts against the second connecting portion, so that the inner and outer walls of the protective cover are sealed and isolated from each other. The rotor is installed in the inner cavity, and there is a preset gap between the outer wall of the rotor and the protective cover.

2. The vehicle-mounted pump motor structure according to claim 1, characterized in that: The first end of the stator includes a first frame, and the second end of the stator includes a second frame. The first frame and the second frame are connected by a body. The first frame is recessed at the connection point with the body to form a first annular portion, and the second frame is recessed at the connection point with the body to form a second annular portion; The first annular portion is filled with a first supporting and fixing ring, and the second annular portion is filled with a second supporting and fixing ring.

3. The vehicle-mounted pump motor structure according to claim 2, characterized in that: The outer wall of the first support fixing ring abuts against the first frame, and the inner wall of the first support fixing ring abuts against the outer wall at the first end of the protective cover. The outer wall of the second support fixing ring abuts against the second frame, and the inner wall of the second support fixing ring abuts against the outer wall at the second end of the protective cover.

4. The vehicle-mounted pump motor structure according to claim 3, characterized in that: A flange is provided at the first end of the protective cover, and the flange is axially fitted with at least a portion of the first support fixing ring and the first frame.

5. The vehicle-mounted pump motor structure according to claim 3, characterized in that: The second end of the protective cover is radially recessed to form a stepped surface, which axially fits against at least a portion of the second support fixing ring.

6. The vehicle-mounted pump motor structure according to claim 1, characterized in that: The protective cover is made of a non-magnetic material.

7. The vehicle-mounted pump motor structure according to claim 6, characterized in that: The protective cover is made of 304 stainless steel.

8. The vehicle-mounted pump motor structure according to claim 1, characterized in that: The thickness of the protective cover is set to 0.1~0.5mm.

9. The vehicle-mounted pump motor structure according to claim 1, characterized in that: A first sealing ring is provided between the inner wall of the first end of the protective cover and the first connecting part.

10. The vehicle-mounted pump motor structure according to claim 9, characterized in that: A second sealing ring is provided between the inner wall of the second end of the protective cover and the second connecting part.

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