PCB board mounting structure and electronic water pump

Abstract

The utility model discloses a kind of PCB mounting structure and electronic water pump in the technical field of electronic water pump, including shell, the bottom end of shell is provided with upper locating hole;PCB, PCB is set in the bottom end outside of shell, and lower locating hole is set on PCB;Stator, stator is set in the inner chamber of shell, and stator is connected with shell axially;The bottom end of stator is connected with locating anchor column, the bottom end of locating anchor column extends along axial direction and is connected with anchor head after passing through upper locating hole and lower locating hole, anchor head is located in the side of PCB away from shell and is abutted with PCB, to make PCB and shell fixed connection in axial direction.The utility model adopts the mode of anchoring connection, not only can realize the fixed connection of PCB and shell, but also can simplify production process, reduce production cost, and can improve the production efficiency of electronic water pump.

Description

Technical Field

[0001] This utility model relates to the field of electronic water pump technology, specifically to a PCB board 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] like Figure 7 As shown, in the prior art, the fixed connection between the PCB board 20 and the housing 10 is achieved by having a threaded hole at the rear end of the housing 10 and a clearance hole on the PCB board 20. Screws 80 are installed in the clearance hole and the threaded hole to fix the PCB board 20 to the rear end of the housing 10. However, in actual production, fixing the PCB board to the housing with screws requires machining a threaded hole at the rear end of the housing, which complicates the production process and increases the production cost of the electronic water pump.

[0004] Therefore, how to achieve the installation and fixation of the PCB board and reduce the production cost 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 PCB board mounting structure to solve the technical problem that existing PCB board mounting structures lead to increased production costs.

[0006] The technical solution adopted in this utility model is: a PCB board mounting structure, comprising:

[0007] The housing has an upper positioning hole at its bottom end;

[0008] A PCB board is disposed on the outer side of the bottom end of the housing, and a lower positioning hole is provided on the PCB board;

[0009] The stator is disposed in the inner cavity of the housing and is axially connected to the housing;

[0010] The stator is connected to a positioning anchor at its bottom end. The bottom end of the positioning anchor extends along the axial direction and connects to the anchor head after passing through the upper positioning hole and the lower positioning hole. The anchor head is located on the side of the PCB board away from the housing and abuts against the PCB board, so that the PCB board and the housing are fixedly connected in the axial direction.

[0011] Preferably, a plurality of positioning bosses are formed on the lower surface of the housing, the lower surfaces of the plurality of positioning bosses are coplanar, and the upper positioning hole axially penetrates the positioning bosses.

[0012] Preferably, the stator is integrally plastic-coated, and the positioning anchor is integrally formed at the bottom end of the stator.

[0013] Preferably, the anchor head is a semi-circular head, which is coaxially arranged with the positioning anchor post, and the radial dimension of the semi-circular head is larger than the radial dimension of the lower positioning hole.

[0014] Preferably, the number of positioning anchors is at least three.

[0015] The second objective of this invention is to provide an electronic water pump, including the aforementioned PCB board mounting structure.

[0016] The beneficial effects of this utility model are:

[0017] This invention employs an anchoring connection method, with a positioning anchor fixedly connected to the bottom of the stator. The bottom end of the positioning anchor penetrates the housing and PCB board and is fixedly connected to the anchor head. This not only achieves a fixed connection between the PCB board and the housing but also simplifies the production process and reduces production costs. Furthermore, the positioning anchor, in conjunction with the upper and lower positioning holes, enables the rapid positioning and installation of the stator and PCB board, thereby improving the production efficiency of the electronic water pump. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the PCB board mounting structure of this utility model;

[0019] Figure 2 A three-dimensional schematic diagram of the PCB board mounting structure;

[0020] Figure 3 A 3D schematic diagram of the PCB mounting structure hidden behind the PCB board;

[0021] Figure 4 This is a three-dimensional schematic diagram of the casing;

[0022] Figure 5 A three-dimensional schematic diagram of the stator;

[0023] Figure 6 This is a 3D schematic diagram of the PCB board;

[0024] Figure 7 This is a schematic diagram of a PCB board mounting structure in the prior art.

[0025] Explanation of the reference numerals in the figure:

[0026] 10. Housing; 11. Upper positioning hole; 12. Positioning boss;

[0027] 20. PCB board; 21. Lower positioning hole; 22. Electrical connection socket;

[0028] 30. Stator; 31. Positioning anchor; 32. Anchor head; 33. Electrical connection pin;

[0029] 40. Rotor;

[0030] 50. Impeller;

[0031] 60. Sealing ring;

[0032] 70. Back cover;

[0033] 80. Screws. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] Examples, such as Figures 1-6As shown, a PCB board mounting structure includes: a housing 10, a PCB board 20, and a stator 30. An upper positioning hole 11 is provided at the bottom end of the housing 10. The PCB board 20 is disposed on the outer side of the bottom end of the housing 10, and a lower positioning hole 21 is provided on the PCB board 20. The stator 30 is disposed in the inner cavity of the housing 10, and the stator 30 is axially connected to the housing 10.

[0039] A positioning anchor 31 is fixedly connected to the bottom end of the stator 30. The bottom end of the positioning anchor 31 extends along the axial direction and connects to the anchor head 32 after passing through the upper positioning hole 11 and the lower positioning hole 21. The anchor head 32 is located on the side of the PCB board 20 away from the housing 10 and abuts against the PCB board 20 so that the PCB board 20 and the housing 10 are fixedly connected in the axial direction.

[0040] This utility model adopts an anchoring connection method, with a positioning anchor 31 fixedly connected to the bottom end of the stator 30. The bottom end of the positioning anchor 31 passes through the housing 10 and the PCB board 20 and is fixedly connected to the anchor head 32. This not only realizes the fixed connection between the PCB board 20 and the housing 10, but also simplifies the production process and reduces production costs. At the same time, the positioning anchor 31 can quickly complete the positioning and installation of the stator 30 and the PCB board 20 through the cooperation of the upper positioning hole 11 and the lower positioning hole 21, thereby improving the production efficiency of the electronic water pump.

[0041] Specific embodiment 1, such as Figures 1-6 As shown, a PCB board mounting structure includes: a housing 10, a PCB board 20, and a stator 30.

[0042] The housing 10 has an open top and a closed bottom, and multiple upper positioning holes 11 are formed at the bottom of the housing 10.

[0043] Preferably, there are three upper positioning holes 11, and the three upper positioning holes 11 are circumferentially distributed around the axis of the housing 10.

[0044] Specifically, such as Figure 4 As shown, multiple positioning bosses 12 are formed on the lower surface of the bottom end of the housing 10. These positioning bosses 12 are circumferentially distributed around the axis of the housing 10, and their lower surfaces are coplanar. This allows the upper surface of the PCB board 20 to simultaneously and tightly fit against the lower surfaces of the multiple positioning bosses 12, ensuring uniform force distribution on the PCB board 20. Furthermore, the PCB board 20 is perpendicular to the axis of the housing 10. The upper positioning hole 11 corresponds one-to-one with the positioning boss 12. The upper positioning hole 11 and the positioning boss 12 are coaxially arranged, and the upper positioning hole 11 penetrates the positioning boss 12 along the axial direction.

[0045] The PCB board 20 is installed on the bottom outer side of the housing 10, and the PCB board 20 is provided with a lower positioning hole 21 and an electrical connection hole 22. The lower positioning hole 21 and the upper positioning hole 11 are in a one-to-one correspondence.

[0046] The stator 30 is installed in the inner cavity of the housing 10 and is fixedly connected to the housing 10 in the axial direction. A sealing ring 60 is installed between the top outer wall of the stator 30 and the housing 10, and a sealing ring 60 is installed between the bottom inner wall of the stator 30 and the housing 10.

[0047] Multiple positioning anchors 31 are connected to the bottom end of the stator 30, and the multiple positioning anchors 31 are distributed circumferentially around the axis of the stator 30. The top end of the positioning anchor 31 is fixedly connected to the bottom end of the stator 30, and the bottom end of the positioning anchor 31 extends along the axial direction. After passing through the upper positioning hole 11 and the lower positioning hole 21, the bottom end of the positioning anchor 31 is connected to the anchor head 32. The anchor head 32 is located on the side of the PCB board 20 away from the housing 10, and the upper surface of the anchor head 32 abuts against the lower surface of the PCB board 20. That is, the upper surface of the anchor head 32 is in close contact with the lower surface of the PCB board 20, so that the PCB board 20 and the housing 10 are fixedly connected in the axial direction, thereby realizing the installation and fixation of the PCB board 20 on the outside of the bottom end of the housing 10.

[0048] Preferably, the stator 30 is integrally molded with plastic, and three positioning anchors 31 are integrally injection molded at the bottom end of the stator 30. This is because: after the stator 30 is assembled, the stator 30 is encapsulated using injection molding, which can directly form the positioning anchors 31 at the bottom end of the stator 30. After the positioning anchors 31 pass through the PCB board 20, the anchor head 32 can be formed by thermoforming the positioning anchors 31.

[0049] More preferably, the anchor head 32 is a semi-circular head, which is coaxially arranged with the positioning anchor post 31, and the radial dimension of the semi-circular head is larger than the radial dimension of the lower positioning hole 21, so that the upper surface of the anchor head 32 abuts against the lower surface of the PCB board 20.

[0050] Examples, such as Figure 1 As shown, an electronic water pump includes the aforementioned PCB board mounting structure, rotor 40, impeller 50, and rear cover 70. The rotor 40 is installed in the inner cavity of the stator 30, and the shaft of the rotor 40 passes through the stator 30 and is connected to the impeller 50 at the front end of the housing 10.

[0051] The rear cover 70 is fixedly installed at the rear end of the housing 10, and a sealing ring 60 is installed between the rear cover 70 and the housing 10.

[0052] The construction process of the PCB board mounting structure of this utility model is as follows:

[0053] When assembling the electric water pump, first install the rotor 40 in the inner cavity of the stator 30; then install the stator 30 in the inner cavity of the housing 10. During the installation of the stator 30, the positioning anchor 31 needs to cooperate with the upper positioning hole 11 to allow the electrical connection pin 33 at the bottom of the stator 30 to pass through the clearance hole at the bottom of the housing 10; then place the PCB board 20 at the bottom of the housing 10 and allow the positioning anchor 31 to pass through the lower positioning hole 21 on the PCB board 20 (to ensure that the electrical connection pin 33 is inserted into the electrical connection socket 22 on the PCB board 20). The bottom end of the positioning anchor 31 is thermoformed to form the anchor head 32. Finally, install the back cover 70.

[0054] 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 PCB board mounting structure, characterized in that, include: The housing (10) has an upper positioning hole (11) at its bottom end; PCB board (20), the PCB board (20) is disposed on the outer side of the bottom end of the housing (10), and the PCB board (20) is provided with a lower positioning hole (21); Stator (30), the stator (30) is disposed in the inner cavity of the housing (10), and the stator (30) is axially connected to the housing (10); The stator (30) is connected to a positioning anchor (31) at its bottom end. The bottom end of the positioning anchor (31) extends along the axial direction and connects to the anchor head (32) after passing through the upper positioning hole (11) and the lower positioning hole (21). The anchor head (32) is located on the side of the PCB board (20) away from the housing (10) and abuts against the PCB board (20) so that the PCB board (20) and the housing (10) are fixedly connected in the axial direction.

2. The PCB board mounting structure according to claim 1, characterized in that, The lower surface of the housing (10) is formed with a plurality of positioning bosses (12), the lower surfaces of the plurality of positioning bosses (12) are coplanar, and the upper positioning hole (11) axially penetrates the positioning bosses (12).

3. The PCB board mounting structure according to claim 1, characterized in that, The stator (30) is entirely plastic-coated, and the positioning anchor (31) is integrally formed at the bottom end of the stator (30).

4. The PCB board mounting structure according to claim 1, characterized in that, The anchor head (32) is a semi-circular head, which is coaxially arranged with the positioning anchor (31), and the radial dimension of the semi-circular head is greater than the radial dimension of the lower positioning hole (21).

5. The PCB board mounting structure according to claim 1, characterized in that, The number of the positioning anchors (31) is at least three.

6. An electronic water pump, characterized in that, The PCB board mounting structure includes any one of claims 1-5.

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