Rear cover mounting structure and electronic water pump
By using positioning holes on the PCB board and positioning posts on the back cover, the problem of aligning electrical connection pins with electrical connection sockets was solved, enabling efficient assembly of the electronic water pump.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PIERBURG HUAYU PUMP TECHNOLOGY CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-06-23
AI Technical Summary
In the current assembly process of electronic water pumps, it is difficult to quickly align the electrical connection pins on the back cover with the electrical connection holes on the PCB board, resulting in low assembly efficiency.
Positioning holes are set on the PCB board, and positioning posts are set on the back cover. The top of the positioning post is located above the electrical connection pin. When installing the back cover, the positioning post is inserted into the PCB board before the electrical connection pin, and the precise alignment of the electrical connection pin and the electrical connection socket is achieved through the cooperation of the positioning post and the positioning hole.
This improved the insertion accuracy of the electrical connection pins and increased the assembly efficiency of the electronic water pump.
Smart Images
Figure CN224396768U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic water pump technology, specifically to a rear cover mounting structure and an electronic water pump. Background Technology
[0002] The basic structure of an electronic water pump includes a casing, a volute, an impeller, a rear cover, a stator, a rotor, and a PCB board. The volute is installed at the front end of the casing, the impeller is installed in the cavity between the volute and the casing, the stator and rotor are installed in the inner cavity of the casing, the rear cover is installed at the rear end of the casing, and the PCB board is installed in the cavity between the rear cover and the casing.
[0003] In existing technology, the PCB board is first fixed to the bottom of the housing with screws. Then, the back cover is placed on the bottom of the housing, and the electrical connection pins on the back cover are inserted into the electrical connection holes on the PCB board. Finally, the back cover is fixed to the housing with screws. In actual production, because the electrical connection pins are located between the back cover and the housing, when the back cover is placed on the bottom of the housing, due to manufacturing tolerances, it is difficult for workers to accurately align the electrical connection pins with the electrical connection pins on the PCB board. Repeated adjustments are required to accurately insert the electrical connection pins on the back cover into the electrical connection holes on the PCB board. This limits the assembly efficiency of the electronic water pump.
[0004] Therefore, how to quickly align the electrical connection pins on the back cover with the electrical connection sockets on the PCB board to improve the assembly efficiency of the electronic water pump has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0005] In view of this, the purpose of this utility model is to provide a back cover mounting structure to solve the technical problem of low back cover mounting efficiency in existing back cover mounting structures.
[0006] The technical solution adopted by this utility model is: a back cover mounting structure, comprising:
[0007] The housing has a clearance hole at its bottom end;
[0008] The PCB board is fixedly connected to the bottom of the housing. The PCB board is provided with electrical connection sockets and positioning holes, and the electrical connection sockets and positioning holes are located below the clearance holes.
[0009] The back cover is disposed on the side of the PCB board away from the housing, and the back cover is fixedly connected to the housing;
[0010] The rear cover is provided with an electrical connection pin and a positioning post. The electrical connection pin is inserted into the electrical connection socket, and the positioning post is inserted into the positioning hole, with the top of the positioning post located above the top of the electrical connection pin.
[0011] Preferably, the positioning post includes a tapered insert head and a columnar guide rod that are axially fixedly connected. The bottom end of the columnar guide rod is fixedly connected to the rear cover, and the top end of the columnar guide rod is fixedly connected to the large-diameter end of the tapered insert head.
[0012] Preferably, the columnar guide rod includes a large-diameter section and a small-diameter section coaxially and fixedly connected. The bottom end of the large-diameter section is fixedly connected to the rear cover, the top end of the small-diameter section is fixedly connected to the conical insert head, and the bottom end of the small-diameter section is fixedly connected to the top end of the large-diameter section. The radial dimension of the large-diameter section is larger than the radial dimension of the positioning hole, so that a limiting surface for axially limiting the electrical connection pin is formed between the small-diameter section and the large-diameter section.
[0013] Preferably, the number of positioning posts is two.
[0014] Preferably, the electrical connection pin is a fisheye pin.
[0015] Preferably, the PCB board and the housing are fixedly connected by internal screws.
[0016] Preferably, the back cover and the housing are fixedly connected by external screws.
[0017] Preferably, a sealing ring is installed between the rear cover and the housing.
[0018] Preferably, the rear cover is provided with a mounting hole, and a vent valve is installed in the mounting hole.
[0019] The second objective of this utility model is to provide an electronic water pump, including the aforementioned rear cover mounting structure.
[0020] The beneficial effects of this utility model are:
[0021] This invention features a positioning hole on a PCB board and a positioning post formed on the back cover, with the top of the positioning post positioned above the electrical connection pin. When installing the back cover, the positioning post is inserted into the PCB board before the electrical connection pin, and the positioning post, in conjunction with the positioning hole, positions the electrical connection pin on the back cover and the electrical connection socket on the PCB board. This allows the electrical connection pin to be accurately inserted into the electrical connection socket, effectively solving the manufacturing tolerance problem, improving the insertion accuracy of the electrical connection pin, and also increasing the assembly efficiency of the electronic water pump. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the rear cover mounting structure of this utility model;
[0023] Figure 2 This is a 3D diagram showing the back cover after it has been removed.
[0024] Figure 3This is a three-dimensional schematic diagram of the casing;
[0025] Figure 4 This is a 3D schematic diagram of the back cover;
[0026] Figure 5 This is a three-dimensional schematic diagram of the positioning post.
[0027] Explanation of the reference numerals in the figure:
[0028] 1. Volute; 2. Impeller; 3. Stator; 4. Rotor; 5. Separator sleeve;
[0029] 10. Housing; 11. Clearance hole; 12. Positioning boss; 13. Connection hole;
[0030] 20. PCB board; 21. Electrical connection socket; 22. Positioning hole;
[0031] 30. Back cover; 31. Electrical connection pin; 32. Positioning post; 33. Conical insert head; 34. Large diameter section; 35. Small diameter section; 36. Limiting surface;
[0032] 40. Internal screws;
[0033] 50. External screws;
[0034] 60. Sealing ring;
[0035] 70. Vent valve. Detailed Implementation
[0036] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.
[0037] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0040] Examples, such as Figures 1-5 As shown, a rear cover mounting structure includes: a housing 10, a PCB board 20, and a rear cover 30. A clearance hole 11 is provided at the bottom end of the housing 10. The PCB board 20 is fixedly connected to the bottom end of the housing 10. An electrical connection socket 21 and a positioning hole 22 are provided on the PCB board 20, and the electrical connection socket 21 and the positioning hole 22 are located directly below the clearance hole 11. The rear cover 30 is disposed on the side of the PCB board 20 away from the housing 10, and the rear cover 30 is fixedly connected to the housing 10.
[0041] An electrical connection pin 31 and a positioning post 32 are provided on the rear cover 30. The electrical connection pin 31 is inserted into the electrical connection socket 21, and the positioning post 32 is inserted into the positioning hole 22. The top end of the positioning post 32 is located above the top end of the electrical connection pin 31.
[0042] This invention features a positioning hole 22 on the PCB board 20 and a positioning post 32 formed on the back cover 30. The top of the positioning post 32 is positioned above the electrical connection pin 31. When installing the back cover 30, the positioning post 32 is inserted into the PCB board 20 before the electrical connection pin 31. Through the cooperation between the positioning post 32 and the positioning hole 22, the electrical connection pin 31 on the back cover 30 and the electrical connection socket 21 on the PCB board 20 are positioned. This allows the electrical connection pin 31 to be accurately inserted into the electrical connection socket 21, which not only effectively solves the manufacturing tolerance problem and improves the insertion accuracy of the electrical connection pin, but also improves the assembly efficiency of the electronic water pump.
[0043] Specific embodiment 1, such as Figures 1-5 As shown, a back cover mounting structure includes:
[0044] The housing 10 has an open top and a closed bottom structure, and an avoidance hole 11 is provided on the bottom plate of the housing 10.
[0045] PCB board 20 is located on the outer side of the bottom end of housing 10. PCB board 20 is parallel to and fixedly connected to the bottom plate of housing 10. Electrical connection socket 21 and positioning hole 22 are formed on PCB board 20, and electrical connection socket 21 and positioning hole 22 are located directly below clearance hole 11.
[0046] Specifically, such as Figure 2 and Figure 3 As shown, the PCB board 20 is fixedly connected to the housing 10 as follows: multiple positioning bosses 12 are formed on the lower surface of the bottom plate of the housing 10, and the lower surfaces of all positioning bosses 12 are coplanar; connection holes 13 are provided on the positioning bosses 12; the upper surface of the PCB board 20 is tightly fitted with the lower surfaces of the multiple positioning bosses 12; multiple internal screws 40 are installed on the PCB board 20, and the internal screws 40 correspond one-to-one with the connection holes 13, and the top of the internal screws 40 passes through the PCB board 20 and is threaded into the connection holes 13, so that the PCB board and the housing 10 are detachably fixedly connected.
[0047] The back cover 30 is located on the side of the PCB board 20 away from the housing 10, and the back cover 30 is fixedly connected to the housing 10 by a plurality of external screws 50.
[0048] An electrical connection pin 31 and a positioning post 32 are installed on the back cover 30. The top of the positioning post 32 is located above the top of the electrical connection pin 31, and the electrical connection pin 31 is inserted into the electrical connection socket 21. The positioning post 32 is inserted into the positioning hole 22, so that the positioning post 32 is inserted into the positioning hole 22 on the PCB board 20 before the electrical connection pin 31. Through the cooperation between the positioning post 32 and the positioning hole 22, the electrical connection pin 31 is accurately inserted into the electrical connection socket 21 on the PCB board 20, thereby avoiding the influence of manufacturing tolerances on the connection and effectively improving the accuracy of the pin insertion.
[0049] Specifically, such as Figure 4 As shown, one or more positioning posts 32 are formed on the side of the rear cover 30 near the housing 10, for example, the number of positioning posts 32 is two.
[0050] The positioning post 32 includes a tapered insert head 33 and a columnar guide rod that are axially fixedly connected. From top to bottom, the radial dimension of the tapered insert head 33 gradually increases, that is, the top end of the tapered insert head 33 is the small diameter end and the bottom end is the large diameter end, so that the positioning post 32 can be smoothly inserted into the positioning hole 22 on the PCB board. The bottom end of the columnar guide rod is fixedly connected to the back cover 30, and the top end of the columnar guide rod is fixedly connected to the large diameter end of the tapered insert head 33, so that the electrical connection pin 31 is guided to be accurately inserted into the electrical connection socket 21 on the PCB board 20 through the cooperation of the columnar guide rod and the positioning hole 22.
[0051] Preferred, such as Figure 5 As shown, the columnar guide rod includes an integrally formed large-diameter section 34 and a small-diameter section 35, with the large-diameter section 34 and the small-diameter section 35 coaxially arranged. The bottom end of the large-diameter section 34 is fixedly connected to the rear cover 30, and the top end of the small-diameter section 35 is coaxially arranged and fixedly connected to the bottom end of the conical insert head 33. The bottom end of the small-diameter section 35 is fixedly connected to the top end of the large-diameter section 34. The radial dimension of the small-diameter section 35 is equal to the radial dimension of the positioning hole 22 (when a reinforcing rib is formed on the outer surface of the small-diameter section 35, the radial dimension of the small-diameter section 35 plus the width of the reinforcing rib equals...). The radial dimension of the positioning hole 22 is greater than that of the large diameter section 34, so that a limiting surface 36 for axially limiting the electrical connection pin 31 is formed between the small diameter section 35 and the large diameter section 34, so that the electrical connection pin 31 has good electrical contact with the PCB board 20; for example, the electrical connection pin 31 is a fisheye pin, and when the limiting surface 36 of the positioning post 32 is in contact with the lower surface of the PCB board 20, the fisheye position of the fisheye pin is just located in the electrical connection hole 21 to prevent the fisheye pin from being over-inserted.
[0052] It should be noted that when the back cover 30 is connected to the PCB board 20, the power supply uses a 3-pin fisheye connection, which has a strong ability to carry large currents.
[0053] Preferably, a sealing ring 60 is installed between the rear cover 30 and the housing 10.
[0054] Preferably, a mounting hole is provided on the back cover 30, and a vent valve 70 is installed in the mounting hole. Through the waterproof and ventilating function of the vent valve 70, the high-temperature gas between the housing 10 and the back cover 30 can be better discharged to the outside, so as to achieve a balance between the internal and external air pressure, which is beneficial to the heat dissipation of the PCB board 20.
[0055] Examples, such as Figure 1 As shown, an electronic water pump includes the aforementioned rear cover mounting structure, and further includes a volute 1, an impeller 2, a stator 3, a rotor 4, and a partition sleeve 5. The partition sleeve 5 is installed in the inner cavity of the housing 10, and the top end of the partition sleeve 5 abuts axially against the housing 10. The rotor 4 is installed in the inner cavity of the partition sleeve 5, and the bottom end of the rotor shaft of the rotor 4 is rotatably connected to the housing 10, while the top end of the rotor shaft of the rotor 4 is rotatably connected to the partition sleeve 5. The stator 3 is fixedly installed between the partition sleeve 5 and the housing 10. The impeller 2 is located on the side of the partition sleeve 5 away from the housing 10, and the impeller 2 is fixedly connected to the rotor shaft of the rotor 4. The volute 1 covers the outside of the impeller 2, and the volute 1 is fixedly connected to the top end of the housing 10.
[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A rear cover mounting structure characterized by comprising: include: The housing (10) has a clearance hole (11) at its bottom end. PCB board (20), the PCB board (20) is fixedly connected to the bottom end of the housing (10), the PCB board (20) is provided with electrical connection socket (21) and positioning hole (22), and the electrical connection socket (21) and positioning hole (22) are located below the clearance hole (11); The rear cover (30) is disposed on the side of the PCB board (20) away from the housing (10), and the rear cover (30) is fixedly connected to the housing (10); The rear cover (30) is provided with an electrical connection pin (31) and a positioning post (32). The electrical connection pin (31) is inserted into the electrical connection socket (21), and the positioning post (32) is inserted into the positioning hole (22). The top of the positioning post (32) is located above the top of the electrical connection pin (31).
2. The rear cover mounting structure according to claim 1, characterized by The positioning post (32) includes a tapered insert (33) and a columnar guide rod that are axially fixedly connected. The bottom end of the columnar guide rod is fixedly connected to the rear cover (30), and the top end of the columnar guide rod is fixedly connected to the large-diameter end of the tapered insert (33).
3. The rear cover mounting structure according to claim 2, characterized by The columnar guide rod includes a large-diameter section (34) and a small-diameter section (35) that are coaxially fixedly connected. The bottom end of the large-diameter section (34) is fixedly connected to the rear cover (30), and the top end of the small-diameter section (35) is fixedly connected to the conical insert head (33). The bottom end of the small-diameter section (35) is fixedly connected to the top end of the large-diameter section (34), and the radial dimension of the large-diameter section (34) is greater than the radial dimension of the positioning hole (22), so that a limiting surface (36) for axially limiting the electrical connection pin (31) is formed between the small-diameter section (35) and the large-diameter section (34).
4. The rear cover mounting structure according to claim 3, characterized in that, The number of the positioning posts (32) is two.
5. A rear cover mounting structure according to any one of claims 1-4, characterized in that, The electrical connection pin (31) is a fisheye pin.
6. The rear cover mounting structure according to claim 1, characterized in that, The PCB board (20) and the housing (10) are fixedly connected by internal screws (40).
7. A rear cover mounting structure according to claim 6, characterized in that, The rear cover (30) and the housing (10) are fixedly connected by external screws (50).
8. A rear cover mounting structure according to claim 7, characterized in that, A sealing ring (60) is installed between the rear cover (30) and the housing (10).
9. A rear cover mounting structure according to claim 1, characterized in that, The rear cover (30) is provided with a mounting hole, and a vent valve (70) is installed in the mounting hole.
10. An electronic water pump, characterized in that, Includes a rear cover mounting structure as described in any one of claims 1-9.