Busbar terminal welding plastic-coated structure

Abstract

The utility model relates to the technical field of automobile motors, in particular to a bus bar terminal welding plastic-coated structure, which comprises a bus bar and a three-phase wiring terminal of a motor, the bus bar comprises a framework and bus bars, the bus bars are provided with connecting parts, and each phase of the wiring terminal is correspondingly welded on the connecting part of one bus bar; the welding part of the wiring terminal and the connecting part is coated with a first plastic coating part, and the outer side of the exposed part of the wiring terminal is coated with a second plastic coating part; a circular protrusion is formed on the inner side of the upper end of the first plastic-coated part, a circular groove hole is formed in the outer side of the lower end of the second plastic-coated part, and the first plastic-coated part and the second plastic-coated part are connected in a buckling mode through the circular protrusion and the circular groove hole to form anti-disengaging connection. According to the utility model, the overall strength after the three-phase wiring terminal and the busbar are welded is improved, the improvement of the assembly precision of later products is facilitated, the overall reliability of the motor is improved, the overall practicability is good, and the market application prospect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile motors, in particular to a busbar terminal welding plastic-coated structure. Background Art

[0002] In automotive motors, the busbar's primary function is to provide the electrical connection between the motor's three-phase stator windings and the motor controller. Currently, brake motors on the market utilize a busbar welded to the three-phase terminal blocks to ensure connection stability. However, the terminals are left unprotected after welding, making them susceptible to high defect rates due to misalignment during production and transportation, as well as deformation during later assembly by the customer. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a busbar terminal welding plastic coating structure to solve the problem in the prior art that the connection terminal and the busbar are easily deformed due to the lack of external protection after welding.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a busbar terminal welding plastic-coated structure, comprising a busbar and a three-phase terminal for a motor, wherein the busbar comprises a frame and three busbars embedded in the frame, the busbars being provided with connecting portions extending to the outside of the frame, and each phase of the terminal being welded to a corresponding connecting portion of a busbar;

[0005] The welding portion between the connection terminal and the connecting portion is covered with a first overmolding component, and the exposed portion of the connection terminal is covered with a second overmolding component.

[0006] A circular protrusion is formed on the inner side of the upper end of the first overmolded part, and a circular slot is provided on the outer side of the lower end of the second overmolded part. The first overmolded part and the second overmolded part are connected to each other through the circular protrusion buckling the circular slot to form an anti-detachment connection.

[0007] In one embodiment of the present invention, the first overmolded component includes a main body and multiple branches integrally formed at the upper end of the main body. The main body simultaneously covers the outside of the three connecting parts, and the multiple branches respectively cover the outside of the lower ends of the three-phase terminal blocks.

[0008] In one embodiment of the present invention, the circular protrusions are formed on the branches, and a single branch is formed with at least two circular protrusions that are distributed opposite to each other.

[0009] In one embodiment of the present invention, a single second overmolded part is covered on a phase terminal, and the number of circular slots provided on the single second overmolded part is the same as the number of circular protrusions formed on the single branch, and the position distribution thereof corresponds to that of the circular slots.

[0010] In one embodiment of the present invention, the front and back surfaces of the second overmolded component are both provided with reinforcing ribs.

[0011] In one embodiment of the present invention, the length of the second overmolded component is not less than half the length of the three-phase terminal.

[0012] In one embodiment of the present invention, the frame is an injection-molded insulating component, and the lower end of the first overmolded component is injection-molded and connected to the frame.

[0013] As described above, the busbar terminal welding plastic-coated structure of the present invention has the following beneficial effects:

[0014] The utility model sets a first overmolded part and a second overmolded part. The first overmolded part can protect and provide support for the welding point between the terminal and the bus bar, and the second overmolded part can protect and provide support for the terminal itself, effectively increasing the strength of the three-phase terminal and the bus bar after welding, reducing the defective rate of the product caused by collision and distortion during the production process and transportation, and due to the support provided by the first overmolded part and the second overmolded part, the product is not easy to deform in the later assembly process, thereby improving the overall reliability of the product; the first overmolded part is injection-molded and connected to the skeleton of the bus bar, and the second overmolded part is anti-detachment connected to the first overmolded part through a circular slot and a circular protrusion, effectively improving the reliability of the overmolding of the motor product; the utility model improves the overall strength of the three-phase terminal and the bus bar after welding, is conducive to improving the assembly accuracy of the later product, improves the overall reliability of the motor, has good overall practicality, and has good market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the present utility model.

[0016] Figure 2 Shown is a schematic diagram of the exploded structure of the present invention.

[0017] Figure 3 Shown is an enlarged structural schematic diagram of the first plastic package in the present invention.

[0018] Figure 4 It shows an enlarged structural diagram of the connection terminal covered with the second plastic cover in the present invention.

[0019] Component number description

[0020] Busbar 1; frame 11; busbar 12; connection portion 121; terminal 2; first overmolded part 3; circular protrusion 31; main body 32; branch 33; second overmolded part 4; circular slot 41; reinforcing rib 42. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] See also Figures 1 to 4 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0023] See also Figures 1 to 4 The utility model provides a busbar terminal welding plastic-coated structure, including a busbar 1 and a three-phase terminal 2 of a motor. Specifically, the three-phase terminal 2 of the motor is the terminal of the three-phase winding of the motor stator; the busbar 1 includes a skeleton 11 and three busbars 12 embedded in the skeleton 11, and the skeleton 11 is an injection-molded insulating part; the busbar 12 is provided with a connecting portion 121 extending to the outside of the skeleton 11, and each phase of the terminal 2 is welded to the connecting portion 121 of a busbar 12, and the busbar 12 is used to realize electrical connection with the corresponding terminal 2.

[0024] The welding point between the terminal block 2 and the connecting portion 121 is covered with a first overmolding part 3, which includes a main body 32 and a plurality of branches 33 integrally formed at the upper end of the main body 32. The main body 32 covers the outside of the three connecting portions 121 at the same time, and the plurality of branches 33 cover the outside of the lower end of the three-phase terminal block 2 respectively; the first overmolding part 3 can protect and support the welding point between the terminal block 2 and the bus bar 12; the exposed part of the terminal block 2 is covered with a second overmolding part 4, and a single second overmolding part 4 covers a single-phase terminal block 2; the second The front and back sides of the second overmolded parts 4 are both provided with reinforcing ribs 42, and the length of the second overmolded part 4 is not less than half the length of the three-phase terminal 2. The second overmolded part 4 can reliably protect and support the terminal 2 itself; the first overmolded part 3 and the second overmolded part 4 are arranged in conjunction with each other to effectively increase the strength of the three-phase terminal 2 and the busbar 1 after welding, thereby reducing the defective rate of the product due to deviation during the production process and transportation, and due to the support provided by the first overmolded part 3 and the second overmolded part 4, the product is not easily deformed during the later assembly process, thereby improving the overall reliability of the product.

[0025] The lower end of the first overmolded part 3 is injection-molded and connected to the skeleton 11; a circular protrusion 31 is formed on the inner side of the upper end of the first overmolded part 3, and a circular slot 41 is provided on the outer side of the lower end of the second overmolded part 4. Specifically, the circular protrusion 31 is formed on the branch 33, and a single branch 33 is formed with at least two relatively distributed circular protrusions 31; the number of circular slots 41 provided on a single second overmolded part 4 is the same as the number of circular protrusions 31 formed on a single branch 33, and the position distribution corresponds to each other; the first overmolded part 3 and the second overmolded part 4 are connected to the circular slot 41 by the circular protrusion 31 to form an anti-detachment connection, thereby preventing the overmolding from falling off and effectively improving the reliability of the overmolding.

[0026] In summary, the first overmolded component 3 and the second overmolded component 4 provided in the present invention improve the overall strength of the three-phase terminal block 2 and the busbar 1 after welding, thereby improving the assembly accuracy of subsequent products and enhancing the overall reliability of the motor. The present invention has excellent overall practicality and promising market application prospects. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and possesses high industrial application value.

[0027] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A busbar terminal welding plastic-coated structure, comprising a busbar (1) and a three-phase terminal (2) of a motor, wherein the busbar (1) comprises a frame (11) and three busbars (12) embedded in the frame (11), the busbars (12) being provided with connecting portions (121) extending to the outside of the frame (11), and each pair of the terminal (2) being welded to the connecting portion (121) of a corresponding busbar (12); Its characteristics are: The welding point between the connecting terminal (2) and the connecting portion (121) is covered with a first overmolding component (3), and the outer side of the exposed portion of the connecting terminal (2) is covered with a second overmolding component (4); A circular protrusion (31) is formed on the inner side of the upper end of the first overmolded part (3), and a circular slot (41) is provided on the outer side of the lower end of the second overmolded part (4). The first overmolded part (3) and the second overmolded part (4) are connected to the circular slot (41) via the circular protrusion (31) to form an anti-detachment connection.

2. The busbar terminal welding plastic-coated structure according to claim 1, characterized in that: The first overmolded component (3) comprises a main body (32) and a plurality of branches (33) integrally formed on the upper end of the main body (32); the main body (32) simultaneously covers the outside of the three connecting portions (121); and the plurality of branches (33) respectively cover the outside of the lower ends of the three-phase terminal blocks (2).

3. The busbar terminal welding plastic-coated structure according to claim 2, characterized in that: The circular protrusions (31) are formed on the branches (33), and at least two circular protrusions (31) that are distributed opposite to each other are formed on a single branch (33).

4. The busbar terminal welding plastic-coated structure according to claim 3, characterized in that: A single second overmolded part (4) is coated on a phase terminal (2), and the number of circular slots (41) provided on the single second overmolded part (4) is the same as the number of circular protrusions (31) formed on the single branch (33), and the position distribution thereof corresponds to that of the circular slots (41).

5. The busbar terminal welding plastic-coated structure according to claim 1, characterized in that: The front and back sides of the second overmolded component (4) are both provided with reinforcing ribs (42).

6. The busbar terminal welding plastic-coated structure according to claim 5, characterized in that: The length of the second overmolded part (4) is not less than half the length of the three-phase terminal (2).

7. The busbar terminal welding plastic-coated structure according to claim 1, characterized in that: The skeleton (11) is an injection-molded insulating component, and the lower end of the first overmolded component (3) is injection-molded and connected to the skeleton (11).

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