Circuit board for plastic package motor

Abstract

The utility model discloses a circuit board for a plastic package motor, which belongs to the technical field of motors, and is characterized in that the circuit board comprises a circuit board main body, a plurality of drainage holes are arranged on the circuit board main body, part of the drainage holes are distributed along the outer contour of the circuit board main body, and one end of the circuit board main body is provided with an installation part for installing an interface. According to the utility model, the plurality of drainage holes are arranged on the circuit board main body, and the BMC material can be guided to flow through the drainage holes, so that the flow speed of the BMC material on the circuit board main body is accelerated, and the pressure applied to the circuit board main body by the BMC material is dispersed through the drainage holes, so that the BMC material is prevented from being damaged. The risk of pressure concentration is reduced, and the circuit board main body is prevented from being damaged or deformed due to excessive pressure applied to the circuit board main body by the BMC material.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a circuit board used for plastic-sealed motors. Background Art

[0002] BMC is a thermosetting plastic material with good insulation properties and mechanical strength. It is commonly used in plastic-sealed motors and circuit boards. During the plastic-sealing process, the BMC material is heated to make it flow and fill it onto the circuit board. However, due to the slow flow rate of the BMC material, it will exert greater pressure on the circuit board. Excessive pressure will cause damage or deformation of the circuit board, such as damaging electronic components or causing the circuit board to bend. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned problems in the prior art and to propose a circuit board for a plastic-sealed motor. The technical problem to be solved by the utility model is: how to avoid damage or deformation of the circuit board due to excessive pressure exerted by the BMC material on the circuit board during the plastic sealing process.

[0004] The above technical purpose of the utility model can be achieved through the following technical scheme: a circuit board for a plastic-sealed motor, comprising a circuit board body, a plurality of drainage holes are opened on the circuit board body, some of the drainage holes are distributed along the outer contour of the circuit board body, one end of the circuit board body is provided with a mounting portion for mounting an interface, and another part of the drainage holes are concentrated at the other end of the circuit board body.

[0005] In the above-mentioned circuit board for plastic-sealed motors, the outer side wall of the circuit board body is provided with a first right-angle surface and a second right-angle surface.

[0006] In the above-mentioned circuit board for plastic-sealed motors, at least two positioning holes are opened on the circuit board body, and the two positioning holes are spaced apart.

[0007] In the above-mentioned circuit board for plastic-sealed motors, an inclined surface is provided at the end of the circuit board body.

[0008] In the above-mentioned circuit board for plastic-sealed motors, a through hole is opened in the middle of the circuit board body, and the through hole is circular.

[0009] In the above-mentioned circuit board for plastic-sealed motors, a plurality of drainage holes are all circular.

[0010] In the above-mentioned circuit board for plastic-sealed motors, reinforcement rings are provided in a plurality of the drainage holes and the through holes.

[0011] In the above-mentioned circuit board for plastic-sealed motors, the reinforcement ring is made of metal material.

[0012] In the above-mentioned circuit board for plastic-sealed motors, the inner side wall of the positioning hole is provided with a wear-resistant layer.

[0013] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0014] 1. By opening a number of drainage holes on the main body of the circuit board, during the plastic packaging process, the several drainage holes can guide the flow of BMC materials, so that the flow rate of BMC materials on the main body of the circuit board is accelerated. At the same time, the drainage holes can disperse the pressure exerted by the BMC material on the main body of the circuit board, reduce the risk of pressure concentration, and prevent the main body of the circuit board from being damaged or deformed due to excessive pressure exerted on it by the BMC material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment.

[0016] Figure numerals: 1. circuit board body; 2. drainage hole; 3. mounting portion; 4. right-angle surface one; 5. right-angle surface two; 6. positioning hole; 7. inclined surface; 8. through hole; 9. reinforcement ring; 10. wear-resistant layer. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] A circuit board for a plastic-encapsulated motor, such as Figure 1 As shown, it includes a circuit board body 1, and a plurality of drainage holes 2 are opened on the circuit board body 1. The plurality of drainage holes 2 are all circular. It should be noted that the pressure applied by the BMC material on the circuit board body 1 is dispersed by the drainage holes 2 to reduce the risk of pressure concentration, and the circular drainage holes 2 help to evenly disperse the pressure applied by the BMC material on the circuit board body 1.

[0019] Some of the drainage holes 2 are distributed along the outer contour of the circuit board body 1 , one end of the circuit board body 1 is provided with a mounting portion 3 for mounting the interface, and another part of the drainage holes 2 is concentratedly distributed at the other end of the circuit board body 1 .

[0020] It should be noted that some of the drainage holes 2 are distributed along the outer contour of the circuit board body 1, and another part of the drainage holes 2 are concentrated at the other end of the circuit board body 1, so as to prevent the pressure from being too concentrated on the position of the circuit board body 1 close to the outer contour and the end of the circuit board body 1, and avoid damage or deformation of the position of the circuit board body 1 close to the outer contour and the end of the circuit board body 1 due to excessive pressure applied by the BMC material.

[0021] It should be noted that due to the existence of the interface, the end of the circuit board body 1 will be subjected to greater pressure, and the mounting portion 3 can effectively improve the structural strength of the end of the circuit board body 1 to prevent the end of the circuit board body 1 from being damaged or deformed due to excessive pressure.

[0022] The outer side wall of the circuit board body 1 is provided with a right-angle surface 1 4 and a right-angle surface 2 5. The right-angle surface 1 is located on one side of the circuit board body 1, and the right-angle surface 2 5 is close to the end of the circuit board body 1. The right-angle surface 1 4 and the right-angle surface 2 5 can improve the strength of the circuit board body 1, and improve the impact resistance and structural stability of the circuit board body 1.

[0023] At least two positioning holes 6 are provided on the circuit board body 1. Preferably, there are two positioning holes 6 and the two positioning holes 6 are spaced apart. The positioning holes 6 are matched with the external positioning structure. The external positioning structure can be inserted into the positioning holes 6. The positioning holes 6 cooperate with the external positioning structure to ensure the stability of the circuit board body 1 and avoid the position of the circuit board body 1 from being offset during the plastic packaging process.

[0024] The inner side wall of the positioning hole 6 is provided with a wear-resistant layer 10 . When the positioning hole 6 cooperates with the external positioning structure, the wear-resistant layer 10 can reduce the wear of the positioning hole 6 .

[0025] An inclined surface 7 is provided at the end of the circuit board body 1. By providing the inclined surface 7 at the end of the circuit board body 1, external structures are avoided, making the overall structure more compact and improving space utilization.

[0026] A through hole 8 is opened in the middle of the circuit board body 1, and the through hole 8 is circular. It should be noted that the through hole 8 can disperse the pressure applied by the BMC material to the middle of the circuit board body 1, avoiding excessive concentration of pressure in the middle of the circuit board body 1, thereby causing damage or deformation to the middle of the circuit board body 1, and the circular through hole 8 helps to evenly disperse the pressure applied by the BMC material to the middle of the circuit board body 1.

[0027] Several drainage holes 2 and through holes 8 are provided with reinforcement rings 9, which are made of metal material. By arranging the reinforcement rings 9 in the drainage holes 2 and through holes 8, the structural strength and durability of the drainage holes 2 and through holes 8 are improved. The reinforcement rings 9 can disperse the pressure applied by the BMC material to the drainage holes 2 and through holes 8, thereby preventing the drainage holes 2 and through holes 8 from being twisted or deformed due to excessive pressure.

[0028] The specific embodiments described in this article are merely examples of the spirit of the utility model; technicians in the technical field to which the utility model belongs can make various modifications or additions to the described specific embodiments or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A circuit board for a plastic-encapsulated motor, characterized in that: The invention comprises a circuit board body (1), wherein a plurality of drainage holes (2) are provided on the circuit board body (1), and some of the drainage holes (2) are distributed along the outer contour of the circuit board body (1); one end of the circuit board body (1) is provided with a mounting portion (3) for mounting an interface, and another portion of the drainage holes (2) are concentratedly distributed at the other end of the circuit board body (1).

2. The circuit board for a plastic-sealed motor according to claim 1, characterized in that: The outer side wall of the circuit board body (1) is provided with a right-angle surface 1 (4) and a right-angle surface 2 (5).

3. The circuit board for a plastic-sealed motor according to claim 1, characterized in that: At least two positioning holes (6) are provided on the circuit board body (1), and the two positioning holes (6) are spaced apart.

4. The circuit board for a plastic-encapsulated motor according to claim 1, characterized in that: An inclined surface (7) is provided at the end of the circuit board body (1).

5. The circuit board for a plastic-sealed motor according to claim 1, characterized in that: A through hole (8) is provided in the middle of the circuit board body (1), and the through hole (8) is circular.

6. The circuit board for a plastic-sealed motor according to claim 5, characterized in that: The plurality of drainage holes (2) are all circular.

7. The circuit board for a plastic-sealed motor according to claim 5, characterized in that: A reinforcement ring (9) is provided inside each of the plurality of drainage holes (2) and the through hole (8).

8. The circuit board for a plastic-sealed motor according to claim 7, characterized in that: The reinforcement ring (9) is made of metal material.

9. The circuit board for a plastic-sealed motor according to claim 3, characterized in that: The inner side wall of the positioning hole (6) is provided with a wear-resistant layer (10).

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