Novel uniformly-distributed permanent magnet synchronous motor wiring board assembly

Abstract

The invention discloses a novel uniformly-distributed permanent magnet synchronous motor wiring board assembly, and particularly relates to the technical field of permanent magnet synchronous motors, the novel uniformly-distributed permanent magnet synchronous motor wiring board assembly comprises a wiring board plastic part, and a central point copper bar, a U-phase wiring board, a V-phase wiring board and a W-phase wiring board are arranged in the wiring board plastic part in an injection molding manner; and a plurality of hook structures are uniformly distributed in the circumferential direction of the wiring board plastic part. According to the novel uniformly-distributed permanent magnet synchronous motor wiring board assembly, the design of uniformly-distributed U-shaped hooks is adopted, winding of varnished wires can be facilitated, the multiple metal pieces and hooks of the U-shaped hooks are uniformly distributed, mutual interference during installation of the varnished wires can be avoided, the stability of a motor during use is improved, the design of integral injection molding is adopted, and the cost is reduced. The problem of tolerance accumulation in a traditional assembly process can be eliminated, the structural stability is improved, the embedded end of the metal part is provided with the boss matched with the plastic part cavity, the copper bar is wrapped by molten plastic during injection molding to form mechanical embedding, and the binding force is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet synchronous motors, and in particular to a novel uniformly distributed permanent magnet synchronous motor terminal board assembly. Background Art

[0002] At present, the wiring board structure of EPS permanent magnet synchronous motor has been widely used. The space size in the circumferential direction of the motor is limited. It is necessary to ensure the realization of series-parallel connection and control the insulation distance of the motor. For motors with a small number of parallel branches, it is easy to achieve in terms of process. However, for motors with a large number of parallel branches, both the position of the three-phase PI N and the distribution of the hooks must be considered in space. The distribution of the hooks in the circumferential direction cannot be evenly distributed due to the influence of the PI N, so it adds great difficulty to the parts processing and the fully automated equipment process, and the production efficiency of the components is relatively low. Summary of the invention

[0003] The main purpose of the present invention is to provide a new type of uniformly distributed permanent magnet synchronous motor terminal board assembly, which can effectively solve the problems of difficult processing technology and relatively low production efficiency.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A novel evenly distributed permanent magnet synchronous motor terminal board assembly comprises a terminal board plastic part, wherein a center point copper bar, a U-phase terminal board, a V-phase terminal board and a W-phase terminal board are injection molded inside the terminal board plastic part;

[0006] The plastic part of the wiring board has a plurality of hook structures evenly distributed in the circumferential direction;

[0007] The wiring board plastic part is provided with a plurality of processing holes.

[0008] Preferably, the central point copper busbar, the U-phase terminal block, the V-phase terminal block and the W-phase terminal block are independently processed and then injection-molded into the terminal block plastic part.

[0009] Preferably, the plurality of process holes are symmetrically distributed on the edge of the plastic part of the wiring board.

[0010] Preferably, the outer circle of the central copper bar is fixed with a U-shaped hook in a circular array, and the inner circle of the wiring board is also fixed with a U-shaped hook in a circular array.

[0011] Preferably, the plurality of U-shaped hooks located on the same side are evenly distributed in the circumferential direction, and the angle difference between adjacent U-shaped hooks is 15°.

[0012] Preferably, the terminal block plastic part is integrated with the center point copper bus, the U-phase terminal block, the V-phase terminal block and the W-phase terminal block by injection molding.

[0013] Preferably, the inner diameter of the plastic part of the terminal block is not less than 56 mm, and the outer diameter is not more than 69 mm;

[0014] The central point copper busbar, U-phase terminal board, V-phase terminal board and W-phase terminal board are all metal parts, and the inner diameter of the metal parts is not less than 46 mm and the outer diameter is not more than 78 mm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This terminal block assembly adopts a uniformly distributed U-shaped hook design, which can facilitate the winding of the enameled wire and improve the stability of the motor. The multiple metal parts and the hooks of the U-shaped hook are evenly distributed, which can avoid interference between the enameled wires during installation and improve the stability of the motor during use.

[0017] 2. This terminal block assembly adopts an integrated injection molding design, which can eliminate the tolerance accumulation problem in the traditional assembly process and improve the structural stability. A boss is set at the embedded end of the metal part to match the plastic part cavity. During injection molding, the molten plastic wraps the copper busbar to form a mechanical fit to enhance the bonding force.

[0018] 3. This terminal block assembly adopts the design of process-processed holes to ensure the position accuracy of the center copper busbar and the U-phase terminal block, V-phase terminal block, and W-phase terminal block. After processing, it is used for grabbing of tooling fixtures to facilitate assembly operations on automated production lines. It is symmetrically distributed on the edge of the plastic parts to avoid structural deformation caused by stress concentration.

[0019] 4. This terminal block assembly adopts a design of multiple hook structures to achieve mechanical fixation of the terminal block assembly, avoid structural displacement caused by vibration when the motor is running, and improve the stability of the motor when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic structural diagram of the metal part of the present invention.

[0022] In the figure: 1. Plastic parts of the terminal block; 2. Center point copper busbar; 3. U-phase terminal block; 4. V-phase terminal block; 5. W-phase terminal block; 6. Hook structure; 7. U-shaped hook. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] like Figure 1 and Figure 2As shown, a novel uniformly distributed permanent magnet synchronous motor terminal board assembly includes a terminal board plastic part 1. The terminal board plastic part 1 serves as the basic frame of the overall structure and is injection molded with high-strength insulating material to provide mechanical support and electrical insulation functions. A center point copper bus 2, a U-phase terminal board 3, a V-phase terminal board 4 and a W-phase terminal board 5 are injection molded inside the terminal board plastic part 1, wherein the center point copper bus 2 connects the neutral point of the three-phase winding of the motor to form a common node of the parallel circuit and is embedded in the center of the terminal board plastic part 1 after independent processing. Copper material is used to improve conductivity, and tin plating on the surface enhances welding reliability. The terminal board plastic part is tightly combined with the plastic part through injection molding to avoid poor contact caused by looseness.

[0025] In addition, to facilitate winding, 12 U-shaped hooks 7 are fixed in a circular array on the outer circle of the center point copper busbar 2, and 4 U-shaped hooks 7 are fixed in a circular array on the inner circle of the terminal block, wherein the multiple U-shaped hooks 7 located in the inner circle correspond to the lead-in ends of the three-phase windings of the motor respectively, so as to realize the electrical connection between the windings and the external circuit. The center point copper busbar 2 is injection molded on the circumferential area of ​​the terminal block plastic part 1 after processing, and its position corresponds to the outlet end of the motor winding. The surface is tinned to facilitate the welding of the enameled wire, and it forms insulation isolation with the terminal block plastic part 1 to prevent phase-to-phase short circuit. An asymmetric layout design is adopted to avoid the evenly distributed area of ​​the 12 U-shaped hooks 7, so as to solve the problem of conflict between the PI N position and the hook distribution in the traditional design. A plurality of hook structures 6 are evenly distributed in the circumferential direction of the terminal block plastic part 1, and the plurality of hook structures 6 cooperate with the motor insulation frame to realize the mechanical fixation of the terminal block assembly and avoid structural displacement caused by vibration during motor operation.

[0026] A plurality of processing holes are arranged on the plastic part 1 of the terminal board. The central copper busbar 2, the U-phase terminal board 3, the V-phase terminal board 4 and the W-phase terminal board 5 are independently processed and then injection molded into the plastic part 1 of the terminal board. The plurality of U-shaped hooks 7 located on the same side are evenly distributed in the circumferential direction. The angle difference between adjacent U-shaped hooks 7 is 15° (for example, the angle difference between two adjacent U-shaped hooks 7 located in the inner circle is 15°, and the angle difference between two adjacent U-shaped hooks 7 located in the outer circle is 15°). Due to the design of evenly distributed multiple U-shaped hooks 7, the winding of the enameled wire can be facilitated. Compared with the unevenly distributed U-shaped hooks 7, the working efficiency during component installation is improved, and the stability of the motor is also improved. Moreover, the even distribution of the multiple U-shaped hooks 7 can avoid mutual interference during the installation of the enameled wire, thereby improving the stability of the motor during use.

[0027] In addition, multiple process holes are symmetrically distributed on the edge of the terminal block plastic part 1, and serve as mold positioning holes during the injection molding process to ensure the position accuracy of the center point copper bus 2 and the U-phase terminal block 3, V-phase terminal block 4, and W-phase terminal block 5. After processing, they are used for grabbing by tooling fixtures to facilitate assembly operations on automated production lines. They are symmetrically distributed on the edge of the plastic part to avoid structural deformation caused by stress concentration.

[0028] In addition, the terminal block plastic part 1 and the center copper busbar 2, U-phase terminal block 3, V-phase terminal block 4 and W-phase terminal block 5 are integrated into one by injection molding, which can eliminate the tolerance accumulation problem in the traditional assembly process and improve the structural stability. A boss is provided at the embedded end of the metal part to match the cavity of the plastic part. During injection molding, the molten plastic wraps the copper busbar to form a mechanical fit to enhance the bonding strength.

[0029] The inner diameter of the plastic part 1 of the terminal block is not less than 56 mm, and the outer diameter is not more than 69 mm. The center copper bus 2, U-phase terminal block 3, V-phase terminal block 4 and W-phase terminal block 5 are all metal parts, and the inner diameter of the metal parts is not less than 46 mm, and the outer diameter is not more than 78 mm.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A novel uniformly distributed permanent magnet synchronous motor terminal block assembly, comprising a terminal block plastic part (1), characterized in that: The terminal block plastic part (1) is internally injection molded with a central copper bar (2), a U-phase terminal block (3), a V-phase terminal block (4) and a W-phase terminal block (5); The wiring board plastic part (1) has a plurality of hook structures (6) evenly distributed in the circumferential direction; The wiring board plastic part (1) is provided with a plurality of process-processed holes.

2. A novel uniformly distributed permanent magnet synchronous motor terminal board assembly according to claim 1, characterized in that: The central point copper bar (2), the U-phase wiring board (3), the V-phase wiring board (4) and the W-phase wiring board (5) are independently processed and then injection-molded into the wiring board plastic part (1).

3. A novel uniformly distributed permanent magnet synchronous motor terminal board assembly according to claim 1, characterized in that: The plurality of process-processed holes are symmetrically distributed on the edge of the wiring board plastic part (1).

4. The novel uniformly distributed permanent magnet synchronous motor terminal board assembly according to claim 1 is characterized in that: The outer circle of the central copper busbar (2) is fixed with 12 U-shaped hooks (7) in a circular array, and the inner circle of the wiring board is also fixed with 4 U-shaped hooks (7) in a circular array.

5. A novel uniformly distributed permanent magnet synchronous motor terminal board assembly according to claim 4, characterized in that: The plurality of U-shaped hooks (7) located on the same side are evenly distributed in the circumferential direction, and the angle difference between adjacent U-shaped hooks (7) is 15°.

6. A novel uniformly distributed permanent magnet synchronous motor terminal board assembly according to claim 1, characterized in that: The terminal block plastic part (1), the central copper bar (2), the U-phase terminal block (3), the V-phase terminal block (4) and the W-phase terminal block (5) are integrally formed by injection molding.

7. The novel uniformly distributed permanent magnet synchronous motor terminal board assembly according to claim 1 is characterized in that: The inner diameter of the terminal block plastic part (1) is not less than 56 mm, and the outer diameter is not more than 69 mm; The central point copper busbar (2), the U-phase wiring board (3), the V-phase wiring board (4) and the W-phase wiring board (5) are all metal parts, and the inner diameter of the metal parts is not less than 46 mm and the outer diameter is not more than 78 mm.

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