Embedded PCB mounting structure of hub motor

Abstract

The embedded PCB mounting structure comprises a PCB mounting structure body composed of a fixing frame and an aluminum support, a plurality of wire passing grooves are formed in the end face of the fixing frame, matching faces are arranged at the lower ends of the wire passing grooves, and the inner walls and the upper ends of the matching faces are each provided with a top inverted buckling part and a bottom clamping part. A barb is arranged on one side of the top clamping portion, an annular groove is formed in the bottom of the aluminum support, at least three grooves are formed in the lower end of the annular groove, and the three grooves are arranged at an angle of 120 degrees. The beneficial effects of the invention are that the aluminum support saves a plurality of screw holes and a plurality of sections of heat-shrinkable bushings, the fixing frame is made of plastic materials, the cost is reduced, the risk that the PCB is damaged by a screwdriver bit during screwing is avoided, the fixing frame is convenient, rapid and reliable to install, the production process and working hours are reduced, the production efficiency is improved, and the automatic welding of a production line is realized.

Description

Technical Field

[0001] The invention relates to the technical field of hub motor PCB board installation, and in particular to an embedded PCB installation structure of a hub motor. Background Art

[0002] The existing assembly structure of the drive wheel hub motor PCB is shown in Figure 6. The PCB is fixed to the middle aluminum bracket by screws, and then the three-phase line is welded to the PCB board. This structure requires tapping the threaded bottom hole in the aluminum bracket. The PCB components are easily damaged during the screw locking process. Before the three-phase line is connected to the PCB, a heat shrink tube must be put on to prevent the edge of the stator core from cutting the paint film and causing a short circuit. The three-phase line cannot be fixed during welding and can only be welded manually. Automated welding cannot be achieved. There are many assembly processes, resulting in a long production cycle, low production line efficiency, and low production capacity. Summary of the invention

[0003] The object of the present invention is to provide an embedded PCB installation structure of a hub motor to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an embedded PCB mounting structure of a hub motor, comprising a PCB mounting structure composed of a fixing frame and an aluminum bracket, the end face of the fixing frame is provided with a plurality of wire passing grooves, the lower ends of the plurality of wire passing grooves are provided with mating surfaces, and the inner walls and upper ends of the plurality of mating surfaces are provided with top undercut portions and bottom clamping portions, and one side of the top clamping portion is provided with a barb, the bottom of the aluminum bracket is provided with an annular groove, and the lower end of the annular groove is provided with at least three grooves, and the three grooves are arranged at 120°.

[0005] For further optimization, the fixing frame is arranged in a ring shape, and a plurality of the wire passing grooves are arranged equidistantly on the end surface of the ring-shaped fixing frame.

[0006] In a further optimization, the matching surface and the annular fixing frame are an integrally formed structure.

[0007] For further optimization, the bottom clamping parts are multiple and arranged in a barb shape, and the top buckle part is formed between every two barbs.

[0008] For further optimization, a plurality of first positioning columns are symmetrically provided at the lower end of the annular fixing frame.

[0009] Further optimized, the end surfaces of the multiple top undercut portions are PCB mounting surfaces.

[0010] Further optimized, the aluminum bracket is an integrally formed aluminum casting.

[0011] Further optimized, the fixing frame is an integrally formed plastic injection molded part.

[0012] Further optimized, the aluminum bracket is provided with a second positioning column on one side of one of the grooves, and the groove is a waist-shaped groove.

[0013] Beneficial Effects

[0014] The embedded PCB mounting structure of the hub motor provided by the present invention saves multiple screw holes and multiple sections of heat shrink tubing in the aluminum bracket, and the newly added fixing bracket is made of plastic material, which reduces the cost; the steps of screwing and putting on heat shrink tubing are saved, and the risk of the screwdriver bit damaging the PCB when screwing is avoided. The fixing bracket is easy, fast and reliable to install, and the production steps and working hours are reduced, thereby improving production efficiency; automatic welding of the production line is realized, the production efficiency is improved, and the welding stability is improved. The PCB is fixed on the aluminum bracket through the double barb structure of the fixing bracket, and the UVW three-phase line can be stuck in the gap of the PCB pad after passing through the barb of the fixing bracket, thereby realizing automatic welding and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the fixing frame of the present invention;

[0017] Figure 3 It is a schematic diagram of the aluminum bracket structure of the present invention;

[0018] Figure 4 It is a schematic diagram of assembling the aluminum bracket and the stator assembly of the present invention;

[0019] Figure 5 It is a schematic diagram of the fixing frame and the aluminum bracket of the present invention;

[0020] Figure 6 It is a schematic diagram of PCB assembly in the prior art. DETAILED DESCRIPTION

[0021] 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.

[0022] Example

[0023] like Figure 1-5As shown, an embedded PCB mounting structure of a hub motor includes a PCB mounting structure composed of a fixing frame 1 and an aluminum bracket 2, a plurality of wire grooves 3 are provided on the end surface of the fixing frame 1, a mating surface 4 is provided at the lower end of each of the plurality of wire grooves 3, and a top undercut portion 5 and a bottom clamping portion 9 are provided on the inner wall and the upper end of each of the plurality of mating surfaces 4, and a barb 6 is provided on one side of the top clamping portion 5, an annular groove 7 is provided at the bottom of the aluminum bracket 2, and at least three grooves 8 are provided at the lower end of the annular groove 7, and the three grooves 8 are arranged at 120°.

[0024] In this embodiment, the fixing frame 1 is arranged in an annular shape, and a plurality of wire passing grooves 3 are arranged at equal intervals on the end surface of the annular fixing frame.

[0025] The matching surface 4 and the annular fixing frame are integrally formed.

[0026] There are multiple bottom clamping parts 9, which are arranged in a barb shape, and a top buckle part 5 is formed between every two barbs.

[0027] A plurality of first positioning columns 10 are symmetrically arranged at the lower end of the annular fixing frame 1, and the relative position between the fixing frame 1 and the stator core is kept fixed by the positioning columns.

[0028] The end surfaces of the multiple top undercut portions 5 are PCB mounting surfaces 11 .

[0029] The aluminum bracket 2 is an integrally formed aluminum casting.

[0030] The fixing frame 1 is an integrally formed plastic injection molded part.

[0031] The aluminum bracket 2 is provided with a second positioning column 11 on one side of one of the grooves 8 , and the groove 8 is a waist-shaped groove.

[0032] The aluminum bracket is interference fit with the stator core and is kept in relative position with the stator core by the positioning column; then the fixing frame is also kept in relative position with the stator core and the aluminum bracket by the positioning column, the bottom buckle of the fixing frame is pressed into the annular groove of the aluminum bracket and installed together with the aluminum bracket, and at the same time, the side of the bottom buckle fits with the waist groove of the aluminum bracket, and together with the positioning column, it plays a radial limiting role; the UVW three-phase line passes through a wire groove of the fixing frame, penetrates into the waist groove of the aluminum bracket, is folded back and hung on the hook on the fixing frame, and is pulled back to the wire package table after passing the second wire groove. Then, the PCB is fixed to the fixing frame through the top undercut of the fixing frame and the PCB mounting surface of the fixing frame. The UVW three-phase line is then pulled back from the second wire groove to the middle and squeezed tightly into the gap of the PCB pad to achieve rapid welding. The welded three-phase line and the undercut of the fixing frame together play the role of fixing the PCB. The entire installation process does not require locking screws or heat shrink tubing for the UVW three-phase line, which reduces the operation steps, avoids the risks brought by complex operations, and can also realize automatic welding of the production line, improve production efficiency, reduce costs and increase efficiency, and increase corporate profits.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the invention content within the protection scope of the present invention.

Claims

1. An embedded PCB mounting structure for a hub motor, characterized in that: The invention comprises a PCB mounting structure composed of a fixing frame (1) and an aluminum bracket (2), wherein the end surface of the fixing frame (1) is provided with a plurality of wire-passing grooves (3), the lower ends of the plurality of wire-passing grooves (3) are provided with a matching surface (4), and the inner walls and upper ends of the plurality of matching surfaces (4) are provided with a top undercut portion (5) and a bottom clamping portion (9), and a barb (6) is provided on one side of the top clamping portion (5), and the bottom of the aluminum bracket (2) is provided with an annular groove (7), and the lower end of the annular groove (7) is provided with at least three grooves (8), and the three grooves (8) are arranged at 120 degrees.

2. The embedded PCB mounting structure of the hub motor according to claim 1, characterized in that: The fixing frame (1) is arranged in an annular shape, and a plurality of the wire passing grooves (3) are arranged at equal distances on the end surface of the annular fixing frame.

3. The embedded PCB mounting structure of the hub motor according to claim 2, characterized in that: The matching surface (4) and the annular fixing frame are formed as an integral structure.

4. The embedded PCB mounting structure of the hub motor according to claim 1, characterized in that: The bottom clamping parts (9) are multiple and arranged in a barb shape, and the top buckle part (5) is formed between every two barbs.

5. The embedded PCB mounting structure of the hub motor according to claim 2, characterized in that: A plurality of first positioning columns (10) are symmetrically arranged at the lower end of the annular fixing frame (1).

6. The embedded PCB mounting structure of the hub motor according to claim 4, characterized in that: The end surfaces of the plurality of top undercut portions (5) are PCB mounting surfaces (11).

7. The embedded PCB mounting structure of the hub motor according to claim 1, characterized in that: The aluminum bracket (2) is an integrally formed aluminum casting.

8. The embedded PCB mounting structure of the hub motor according to claim 1, characterized in that: The fixing frame (1) is an integrally formed plastic injection molded part.

9. The embedded PCB mounting structure of the hub motor according to claim 1, characterized in that: The aluminum bracket (2) is provided with a second positioning column (11) on one side of one of the grooves (8), and the groove (8) is a waist-shaped groove.

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