A conductive connection structure between a stator assembly and a PCBA board

Abstract

The utility model discloses a conductive connection structure between a stator assembly and a PCBA board, including a phase ring assembly, a first conductive sheet, a second conductive sheet and a third conductive sheet are arranged on the phase ring assembly, a plurality of metal hooks are arranged on the first conductive sheet, the second conductive sheet and the third conductive sheet respectively, a first conductive rod, a second conductive rod and a third conductive rod are also arranged on the first conductive sheet, the second conductive sheet and the third conductive sheet respectively, the PCBA board is fixed on a heat sink, three lower sealing columns are arranged on the heat sink, three upper sealing columns are arranged on the phase ring assembly, upper sealing cavities and lower sealing cavities are arranged on the upper sealing columns and the lower sealing columns respectively, the first conductive rod, the second conductive rod and the third conductive rod are respectively welded and fixed to the PCBA board, the first conductive rod, the second conductive rod and the third conductive rod are all equipped with sealing plugs, and the sealing plugs are extruded and arranged in the corresponding upper sealing cavities and lower sealing cavities. The conductive connection structure has a simple structure and better sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a conductive connection structure between a stator assembly and a PCBA board. Background Art

[0002] The motor is a commonly used power device used in various industries, and patent publication number 202111286404.8 discloses an outer rotor motor for driving an automobile cooling fan, including an intermediate phase ring, on which three metal guard hooks are evenly clamped, each of which is provided with two wiring harness hooks and one connecting hook. The motor also requires a conductive bracket and a conductive rod, wherein the wiring harness of the stator winding is wound on the wiring harness hook according to a set winding method, and then the conductive bracket is arranged on the heat sink, and then the three conductive rods need to be bent and clamped on the conductive bracket, and then one end is inserted into the connecting hook, and the other end is welded to the PCBA board. The connection structure between the stator assembly and the PCBA board is relatively complicated, and welding is required between the conductive rod and the connecting hook, which increases the difficulty of welding; and a conductive bracket is added, so a sink area for convenient placement of the conductive bracket needs to be formed on the heat sink, and the conductive bracket also needs to be additionally formed, which increases the cost of forming. In addition, the conductive rod passes through the through hole. Since a groove area is provided on the heat sink, the through hole is provided in the groove area. Even if a sealing sleeve is provided in the through hole, the sealing sleeve is only squeezed in the through hole and there is no squeezing in the axial direction. In this way, the sealing performance is difficult to guarantee over time, especially for motors used in automobiles. Especially when the automobile is used, there will be bumps, which will also aggravate the failure of the seal. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a conductive connection structure between a stator assembly and a PCBA board, wherein the conductive connection structure has a simple structure and better sealing performance.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a conductive connection structure between a stator assembly and a PCBA board, including a phase ring component, on which a first conductive sheet, a second conductive sheet and a third conductive sheet are arranged, and a plurality of metal hooks are arranged on the first conductive sheet, the second conductive sheet and the third conductive sheet respectively, and the three-phase winding of the stator assembly is electrically connected to the corresponding metal hooks in a winding manner, and the first conductive sheet, the second conductive sheet and the third conductive sheet are also respectively provided with a first conductive rod, a second conductive rod and a third conductive rod, and the PCB The A plate is fixed on the heat sink, and three lower sealing columns are arranged on the heat sink. Three upper sealing columns corresponding to the lower sealing columns are arranged on the phase ring assembly. The upper sealing columns and the lower sealing columns are respectively provided with upper sealing cavities and lower sealing cavities. The first conductive rod, the second conductive rod and the third conductive rod are respectively penetrated through the corresponding upper sealing columns and the lower sealing columns and are welded and fixed to the PCBA board. The first conductive rod, the second conductive rod and the third conductive rod are all provided with sealing plugs, and each sealing plug is extruded and arranged in the corresponding upper sealing cavity and the lower sealing cavity.

[0005] As a preferred solution, the upper sealing cavity is a conical cavity with a small top and a large bottom, and the lower sealing cavity is a conical cavity with a large top and a small bottom. The sealing plug includes an upper frustum body and a lower frustum body connected to each other, the upper frustum body is inserted into the upper sealing cavity, and the lower frustum body is inserted into the lower sealing cavity, and the sealing plug is provided with a through-hole.

[0006] As a preferred solution, the upper opening size of the lower sealing cavity is larger than the outer diameter of the upper sealing column.

[0007] As a preferred solution, an annular groove is further provided on the upper edge of the lower sealing cavity.

[0008] As a preferred solution, a conical guide section which expands from bottom to top is provided at the upper opening of the sleeve hole.

[0009] As a preferred solution, a bottom cavity whose size is larger than the lower sealing hole is provided at the bottom of the lower sealing column, and the lower end of the lower frustum body is located in the bottom cavity.

[0010] After adopting the above technical scheme, the effect of the utility model is as follows: due to a conductive connection structure between a stator assembly and a PCBA board, including a phase ring component, the phase ring component is provided with a first conductive sheet, a second conductive sheet and a third conductive sheet, and the first conductive sheet, the second conductive sheet and the third conductive sheet are respectively provided with a plurality of metal hooks, and the three-phase winding of the stator assembly is electrically connected with the corresponding metal hooks in a winding manner, and the first conductive sheet, the second conductive sheet and the third conductive sheet are also respectively provided with a first conductive rod, a second conductive rod and a third conductive rod, and the PCBA board is fixed on a heat sink, and three lower sealing columns are provided on the heat sink, and three upper sealing columns corresponding to the lower sealing columns are provided on the phase ring component, and the upper sealing column and the lower sealing column are respectively provided with an upper sealing cavity and a lower sealing cavity, and the first conductive rod, the second conductive rod and the third conductive rod respectively penetrate the corresponding upper sealing column and the lower sealing column After that, it is welded and fixed with the PCBA board. The first conductive rod, the second conductive rod and the third conductive rod are all equipped with sealing plugs, and each sealing plug is squeezed and set in the corresponding upper sealing cavity and lower sealing cavity. Therefore, compared with the current structure, the conductive connection structure has the following advantages: 1. The three conductive plates of the conductive connection structure are directly connected to the three conductive rods, and the conductive rods are directly inserted through the heat sink and welded with the PCBA board, thereby reducing the number of welding times and making the assembly simpler; 2. The upper sealing cavity and the lower sealing cavity are respectively provided on the upper sealing column and the lower sealing column, and the three conductive rods are all equipped with sealing plugs, and each sealing plug is squeezed and set in the corresponding upper sealing cavity and the lower sealing cavity. Therefore, after assembly, the sealing plugs are always squeezed in the upper sealing cavity and the lower sealing cavity, and the sealing plugs are not only subjected to radial pressure, but also to axial pressure, so that the sealing effect is better and the sealing effect can be guaranteed for a long time.

[0011] Furthermore, since the upper sealing cavity is a conical cavity with a small upper part and a large lower part, and the lower sealing cavity is a conical cavity with a large upper part and a small lower part, the sealing plug includes an upper frustum body and a lower frustum body that are connected, the upper frustum body is inserted into the upper sealing cavity, and the lower frustum body is inserted into the lower sealing cavity, and a through sleeve hole is provided on the sealing plug. After adopting the above structure, the upper frustum body and the lower frustum body of the sealing plug will be squeezed by the conical cavity, and the overall sealing effect is better.

[0012] As a preferred solution, the upper opening size of the lower sealing cavity is larger than the outer diameter of the upper sealing column, so that during assembly, the upper sealing column will squeeze the sealing plug downward to make it better enter the lower sealing cavity, and the difference in size can reduce the accuracy required for assembly, and even if the lower end of the upper sealing column enters the lower sealing cavity, it can still be well sealed and assembled.

[0013] As a preferred solution, the upper edge of the lower sealing cavity is further provided with an annular groove, so that when the lower end of the upper sealing column presses the sealing plug, the annular groove can also accommodate the deformation of the sealing plug.

[0014] As a preferred solution, a conical guide section that expands from bottom to top is provided at the upper opening of the sleeve hole, which facilitates the insertion and guiding of the three conductive rods.

[0015] As a preferred solution, the bottom of the lower sealing column is provided with a bottom cavity whose size is larger than the lower sealing hole cavity, and the lower end of the lower frustum body is in the bottom cavity, so that the entire lower frustum body can be better inserted into the lower sealing hole cavity, and after the sealing plug is squeezed by the lower sealing hole cavity, the upper end of the sealing plug can accommodate the deformation by the annular groove, and the lower end can accommodate the deformation by the bottom cavity, thereby further ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the structure of the stator assembly and the heat sink after installation of the embodiment of the utility model;

[0018] Figure 2 yes Figure 1 Sectional view at AA;

[0019] Figure 3 yes Figure 2 An enlarged schematic diagram at B;

[0020] Figure 4 This is a schematic diagram of the front structure of the heat sink;

[0021] Figure 5 It is a stereogram of the phase ring assembly;

[0022] Figure 6 is a three-dimensional diagram of the sealing plug;

[0023] Figure 7 is a cross-sectional view of the sealing plug;

[0024] In the attached drawings: 1. heat sink; 101. lower sealing column; 102. bottom cavity; 103. lower sealing hole; 104. annular groove; 2. phase ring assembly; 21. phase ring body; 22. first conductive sheet; 23. second conductive sheet; 24. third conductive sheet; 25. first conductive rod; 26. second conductive rod; 27. third conductive rod; 28. metal protective hook; 29. ​​upper sealing column; 291. upper sealing hole; 3. sealing plug; 31. upper frustum body; 32. lower frustum body; 33. conical guide section; 34. sleeve hole; 4. PCBA board. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through specific embodiments.

[0026] like Figures 1 to 7 As shown, a conductive connection structure between a stator assembly and a PCBA board includes a phase ring component 2, which is fixed inside the stator core. The phase ring component 2 includes a plastic phase ring body 21, and a first conductive sheet 22, a second conductive sheet 23 and a third conductive sheet 24 are provided on the phase ring component 2. A plurality of metal hooks 28 are provided on the first conductive sheet 22, the second conductive sheet 23 and the third conductive sheet 24, respectively. The three-phase winding of the stator assembly is electrically connected to the corresponding metal hooks 28 in a winding manner. The first conductive sheet 22, the second conductive sheet 23 and the third conductive sheet 24 are also provided with a first conductive rod 25, a second conductive rod 26 and a third conductive rod 27, respectively. The PCBA board 4 is fixed on the heat sink 1, and the heat sink 1 is provided with three lower sealing columns 101. The upper and lower parts described in this embodiment are used to install the motor. Figure 2 The stator assembly is located above the heat sink 1 at this time. The phase ring assembly 2 is provided with three upper sealing columns 29 corresponding to the lower sealing columns 101 one by one, and the upper sealing cavities 291 and lower sealing cavities 103 are respectively provided on the upper sealing columns 29 and the lower sealing columns 101. The first conductive rod 25, the second conductive rod 26 and the third conductive rod 27 respectively penetrate the corresponding upper sealing columns 29 and the lower sealing columns 101 and are welded and fixed to the PCBA board 4. The first conductive rod 25, the second conductive rod 26 and the third conductive rod 27 are all provided with sealing plugs 3, and each sealing plug 3 is extruded and arranged in the corresponding upper sealing cavity 291 and the lower sealing cavity 103.

[0027] The upper sealing cavity 291 is a conical cavity with a small top and a large bottom, and the lower sealing cavity 103 is a conical cavity with a large top and a small bottom. The sealing plug 3 includes an upper frustum body 31 and a lower frustum body 32 connected to each other. The upper frustum body 31 is inserted into the upper sealing cavity 291, and the lower frustum body 32 is inserted into the lower sealing cavity 103. The sealing plug 3 is provided with a through sleeve hole 34. The upper opening size of the lower sealing cavity 103 is larger than the outer diameter of the upper sealing column 29. A plane step is formed between the upper frustum body 31 and the lower frustum body 32.

[0028] The upper edge of the lower sealing cavity 103 is also provided with an annular groove 104. The upper opening of the sleeve hole 34 is provided with a conical guide section 33 that expands from bottom to top, so as to facilitate the insertion of the first conductive rod 25, the second conductive rod 26 and the third conductive rod 27. The bottom of the lower sealing column 101 is provided with a bottom cavity 102 whose size is larger than the lower sealing cavity 103, and the lower end of the lower frustum body 32 is located in the bottom cavity 102.

[0029] from Figure 3 It can be found that the first conductive rod 25 and the first conductive sheet 22 are formed by bending.

[0030] After the sealing plug 3 is inserted into the upper sealing cavity 291 and the lower sealing cavity 103, the stator core needs to be fixed to the heat sink 1, which will cause the upper sealing column 29 and the lower sealing column 101 to move closer to each other and squeeze the sealing plug 3. The lower end of the sealing plug 3 will gradually enter the bottom cavity 102, and the deformation of the connection position between the lower frustum body 32 and the upper frustum body 31 will also enter the annular groove 104. Finally, the sealing plug 3 will completely seal the three conductive rods, thus short-circuiting the water.

[0031] Compared with the existing connection, this conductive connection structure has at least the following advantages: 1. The three conductive rods are directly connected to the conductive sheets one by one, and the conductive sheets are directly embedded in the phase ring body 21, which reduces the welding action; 2. The sealing plug 3 can better install and seal the three conductive rods to improve the waterproof performance.

[0032] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solution of the present invention, without departing from the design spirit of the present invention, should fall within the scope of protection defined in the claims of the present invention.

Claims

1. A conductive connection structure between a stator assembly and a PCBA board, comprising a phase ring assembly, wherein the phase ring assembly is provided with a first conductive sheet, a second conductive sheet and a third conductive sheet, wherein the first conductive sheet, the second conductive sheet and the third conductive sheet are respectively provided with a plurality of metal hooks, wherein the three-phase winding of the stator assembly is electrically connected to the corresponding metal hooks in a winding manner, wherein the first conductive sheet, the second conductive sheet and the third conductive sheet are further respectively provided with a first conductive rod, a second conductive rod and a third conductive rod, wherein the PCBA board is fixed on a heat sink, wherein: Three lower sealing columns are arranged on the heat sink, three upper sealing columns corresponding to the lower sealing columns are arranged on the phase ring assembly, upper sealing holes and lower sealing holes are arranged on the upper sealing columns and the lower sealing columns respectively, the first conductive rod, the second conductive rod and the third conductive rod respectively penetrate the corresponding upper sealing columns and the lower sealing columns and are welded and fixed to the PCBA board, the first conductive rod, the second conductive rod and the third conductive rod are all equipped with sealing plugs, and each sealing plug is extruded and arranged in the corresponding upper sealing hole and the lower sealing hole.

2. The conductive connection structure between a stator assembly and a PCBA board according to claim 1, characterized in that: The upper sealing cavity is a conical cavity with a small top and a large bottom, and the lower sealing cavity is a conical cavity with a large top and a small bottom. The sealing plug includes an upper frustum body and a lower frustum body connected to each other. The upper frustum body is inserted into the upper sealing cavity, and the lower frustum body is inserted into the lower sealing cavity. The sealing plug is provided with a through sleeve hole.

3. The conductive connection structure between a stator assembly and a PCBA board according to claim 2, characterized in that: The upper opening size of the lower sealing cavity is larger than the outer diameter of the upper sealing column.

4. The conductive connection structure between a stator assembly and a PCBA board according to claim 3, characterized in that: The upper edge of the lower sealing cavity is also provided with an annular groove.

5. The conductive connection structure between a stator assembly and a PCBA board according to claim 4, characterized in that: The upper opening of the sleeve hole is provided with a conical guide section which expands from bottom to top.

6. The conductive connection structure between a stator assembly and a PCBA board according to claim 5, characterized in that: The bottom of the lower sealing column is provided with a bottom cavity whose size is larger than the lower sealing hole cavity, and the lower end of the lower frustum body is located in the bottom cavity.

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