Brushless motor stator plastic coating structure

Abstract

The utility model discloses a brushless motor stator plastic-coated structure which comprises an insulating plastic-coated body and a stator core. The insulating plastic-coated body comprises an annular ring body part, a plurality of T-shaped wrapping posts are integrally and convexly arranged on the outer peripheral side wall of the ring body part outwards, and the T-shaped wrapping posts are sequentially and uniformly arranged at intervals in the circumferential direction; the stator iron core comprises an inner stator iron core ring and a plurality of outer stator iron core pieces, and the inner stator iron core ring is arranged on the inner peripheral side wall of the ring body part; the T-shaped winding post comprises a winding main body part and an arc-shaped plate part, the arc-shaped plate part extends in the circumferential direction and is concavely arranged, the two ends of the arc-shaped plate part in the circumferential direction respectively extend out of the two ends of the winding main body part, and the outer stator iron core sheet is arc-shaped and is arranged on the outer side surface of the arc-shaped plate part; first R angles are arranged on two opposite sides of the upper end and two opposite sides of the lower end of the winding main body part; second R angles are arranged at two ends of the inner side surface of the arc-shaped plate part in the circumferential direction; the purpose of preventing burrs and burrs can be achieved, and winding can be prevented from being cut off.

Description

Technical Field

[0001] The utility model relates to the technology of the stator of a brushless motor, in particular to a plastic-coated structure of the stator of a brushless motor. Background Art

[0002] For the existing plastic-encapsulated motor, the stator core and the winding adopt an insulation form of an insulating frame, that is, an insulating material is injection-molded into a frame form, and then the frame is sleeved on the core to form a plastic-coated structure of the stator core, and then the winding is wound on the frame forming the plastic-coated structure of the stator core.

[0003] The plastic-coated structure of the stator core on the market usually includes an insulating plastic-coated body and a stator core. The insulating plastic-coated body is in an annular structure. A plurality of T-shaped wire-winding posts protrude outward from the outer peripheral side wall of the insulating plastic-coated body. The plurality of T-shaped wire-winding posts are arranged at equal intervals in sequence along the circumferential direction. The stator core includes an outer stator iron core sheet and an inner stator iron core ring. The inner stator iron core ring is arranged on the inner peripheral side wall of the insulating plastic-coated body. The outer stator iron core sheet is arranged on the side of the T-shaped wire-winding post away from the insulating plastic-coated body. Although the wire can be wound on the T-shaped wire-winding post, since the two wire-winding surfaces of the T-shaped wire-winding post are smoothly transitioned and the included angle between the two is a right angle, it is easy to have burrs and flash, and it is difficult to achieve the purpose of preventing burrs and flash, and the wire may be cut during wire winding.

[0004] Therefore, it is necessary to research a new technology to solve the above problems. Summary of the Utility Model

[0005] In view of this, in view of the deficiencies of the existing technology, the main purpose of the utility model is to provide a plastic-coated structure of the stator of a brushless motor, which can achieve the purpose of preventing burrs and flash and can prevent the wire from being cut.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A plastic-coated structure of the stator of a brushless motor includes an insulating plastic-coated body and a stator core; the insulating plastic-coated body includes an annular ring part, and a plurality of T-shaped wire-winding posts protrude integrally outward from the outer peripheral side wall of the ring part. The plurality of T-shaped wire-winding posts are arranged at equal intervals in sequence along the circumferential direction;

[0008] The stator core includes an inner stator iron core ring and a plurality of outer stator iron core sheets. The inner stator iron core ring is arranged on the inner peripheral side wall of the ring part;

[0009] The T-shaped winding column includes a winding main body portion and an arc-shaped plate portion. One end of the winding main body portion is integrally connected to the outer peripheral side wall of the ring body portion. The arc-shaped plate portion is integrally connected to the end of the winding main body portion away from the ring body portion. The arc-shaped plate portion extends in the circumferential direction and is recessed inward. The two ends of the arc-shaped plate portion in the circumferential direction respectively extend out of the two ends of the winding main body portion. The outer stator iron core sheet is arc-shaped and is disposed on the outer side surface of the arc-shaped plate portion;

[0010] First R corners are provided on both pairs of sides at the upper end and both pairs of sides at the lower end of the winding main body portion. Second R corners are provided at both ends of the inner side surface of the arc-shaped plate portion in the circumferential direction.

[0011] As a preferred solution, the upper and lower surfaces of the winding main body portion are respectively flush with the upper and lower surfaces of the ring body portion. A third R corner is provided at the connection between the winding main body portion and the outer peripheral side wall of the ring body portion.

[0012] As a preferred solution, the upper and lower surfaces of the winding main body portion are respectively flush with the upper and lower surfaces of the arc-shaped plate portion. A fourth R corner is provided at the connection between the winding main body portion and the arc-shaped plate portion.

[0013] As a preferred solution, a pin convex portion protrudes from the lower surface of the arc-shaped plate portion. A pin hole is provided in the pin convex portion. A pin is installed in the pin hole, and the lower end of the pin extends out of the lower end of the pin convex portion.

[0014] As a preferred solution, six T-shaped winding columns are provided. Correspondingly, six outer stator iron core sheets, pin convex portions, and pins are provided.

[0015] As a preferred solution, a plurality of arc-shaped grooves are provided on the inner peripheral side wall of the inner stator iron core ring. The plurality of arc-shaped grooves are arranged in sequence at equal intervals in the circumferential direction. The arc-shaped grooves extend in the axial direction and penetrate through the upper and lower ends of the inner stator iron core ring.

[0016] As a preferred solution, annular bosses protrude from one side of the upper and lower surfaces of the ring body portion away from the winding main body portion.

[0017] The utility model has obvious advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it is mainly provided with first R corners on both pairs of sides at the upper end and both pairs of sides at the lower end of the winding main body part. In this way, the purpose of preventing burrs and flash can be achieved on the T-shaped winding column, and the winding can be prevented from being cut off by the first R corners. Secondly, by providing second R corners at both ends in the circumferential direction on the inner side surface of the arc-shaped plate part, the purpose of preventing wire hanging can be achieved, and the arc-shaped plate part can be strengthened and prevented from breaking by the second R corners. Moreover, by providing a third R corner at the connection between the outer peripheral side walls of the winding main body part and the ring body part, and a fourth R corner at the connection between the winding main body part and the arc-shaped plate part, the overall effect of preventing burrs and flash can be improved, and the performance of preventing the winding from being cut off can be further improved.

[0018] To more clearly elaborate on the structural features, technical means, and the specific purposes and functions achieved by the utility model, the following will further elaborate on the utility model in detail with reference to the attached drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram of the overall structure of an embodiment of the utility model;

[0020] Figure 2 is a three-dimensional schematic diagram of the overall structure of the embodiment of the utility model from another angle;

[0021] Figure 3 is a top view of the embodiment of the utility model;

[0022] Figure 4 is a bottom view of the embodiment of the utility model.

[0023] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS:

[0024] 10, insulating plastic sheath; 11, ring body part

[0025] 12, T-shaped winding column; 121, winding main body part

[0026] 122, arc-shaped plate part; 123, pin convex part

[0027] 124, pin; 13, annular boss

[0028] 20, inner stator iron core ring; 30, outer stator iron core chip

[0029] 101, first R corner; 102, second R corner

[0030] 103, third R corner; 104, fourth R corner

[0031] 105, arc-shaped groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Please refer to Figures 1 to 4 as shown, which shows the specific structure of the embodiment of the present utility model.

[0033] A brushless motor stator plastic coating structure includes an insulating plastic coating body 10 and a stator core; the insulating plastic coating body 10 includes an annular ring body portion 11, and several T-shaped winding posts 12 are integrally protruded outward from the outer peripheral side wall of the ring body portion 11, and the several T-shaped winding posts 12 are arranged at equal intervals in sequence along the circumferential direction; the stator core includes an inner stator core ring 20 and several outer stator iron core sheets 30, and the inner stator core ring 20 is arranged on the inner peripheral side wall of the ring body portion 11; the T-shaped winding post 12 includes a winding main body portion 121 and an arc-shaped plate portion 122, one end of the winding main body portion 121 is integrally connected to the outer peripheral side wall of the ring body portion 11, the arc-shaped plate portion 122 is integrally connected to the end of the winding main body portion 121 far from the ring body portion 11, the arc-shaped plate portion 122 extends along the circumferential direction and is recessed inward, and both ends of the arc-shaped plate portion 122 in the circumferential direction respectively extend out of both ends of the winding main body portion 121, and the outer stator iron core sheet 30 is arc-shaped and is arranged on the outer side surface of the arc-shaped plate portion 122; in this embodiment, six T-shaped winding posts 12 are provided, and correspondingly, six outer stator iron core sheets 30 are provided. Ring-shaped protrusions 13 are protruded from both the upper and lower surfaces of the ring body portion 11 on the side far from the winding main body portion 121, so as to facilitate positioning with other structural components of the motor.

[0034] Several arc-shaped grooves 105 are provided on the inner peripheral side wall of the inner stator core ring 20, and the several arc-shaped grooves 105 are arranged at equal intervals in sequence along the circumferential direction, and the arc-shaped grooves 105 extend along the axial direction and penetrate through the upper and lower ends of the inner stator core ring 20.

[0035] First R corners 101 are provided on both pairs of sides at the upper end and both pairs of sides at the lower end of the winding main body portion 121, and second R corners 102 are provided at both ends of the inner side surface of the arc-shaped plate portion 122 in the circumferential direction; thus, the purpose of preventing burrs and flash can be achieved on the T-shaped winding post 12, and the winding can be prevented from being cut off by the first R corner 101, and, through the second R corner 102, the purpose of preventing wire hanging can be achieved, and the arc-shaped plate portion 122 can be strengthened and fracture can be prevented through the second R corner 102.

[0036] The upper and lower surfaces of the winding main body portion 121 are respectively flush with the upper and lower surfaces of the ring body portion 11, and a third R corner 103 is provided at the connection between the winding main body portion 121 and the outer peripheral side wall of the ring body portion 11; and, the upper and lower surfaces of the winding main body portion 121 are respectively flush with the upper and lower surfaces of the arc-shaped plate portion 122, and a fourth R corner 104 is provided at the connection between the winding main body portion 121 and the arc-shaped plate portion 122; thus, through the combined design of the third R corner 103 and the fourth R corner 104, the overall burr and flash prevention effect can be improved, and the performance of preventing the winding from being cut can be further enhanced.

[0037] A pin convex portion 123 protrudes from the lower surface of the arc-shaped plate portion 122. The pin convex portion 123 is provided with a pin hole, and a pin 124 is installed in the pin hole. The lower end of the pin 124 extends outside the lower end of the pin convex portion 123. Both the pin convex portion 123 and the pin 124 are provided with six; thus, through the design of the pin convex portion 123 and the pin 124, it is more beneficial for accurate positioning and assembly with other structural components of the motor.

[0038] And, in this embodiment, the outer stator iron core sheet 30 and the inner stator iron core ring 20 are integrally formed and connected through an iron core connection section. The iron core connection section is covered in the winding main body portion 121 of the T-shaped winding column 12. The arc-shaped plate portion 122 of the T-shaped winding column 12 covers the inner arc surface and the upper and lower end faces of the outer stator iron core sheet 30, and the ring body portion 11 covers the upper and lower end faces of the inner stator iron core ring 20.

[0039] In summary, the design focus of the present utility model is that first, two pairs of sides at the upper end and two pairs of sides at the lower end of the winding main body portion are respectively provided with first R corners. Thus, the purpose of preventing burrs and flashes can be achieved on the T-shaped winding column, and the winding can be prevented from being cut through the first R corners. Secondly, by providing second R corners at both ends in the circumferential direction on the inner side surface of the arc-shaped plate portion, the purpose of preventing wire hanging can be achieved, and the arc-shaped plate portion can be strengthened and protected against fracture through the second R corners. And, by providing a third R corner at the connection between the winding main body portion and the outer peripheral side wall of the ring body portion, and a fourth R corner at the connection between the winding main body portion and the arc-shaped plate portion, the overall burr and flash prevention effect can be improved, and the performance of preventing the winding from being cut can be further enhanced.

[0040] The above is only a preferred embodiment of the present utility model, and does not impose any limitation on the technical scope of the present utility model. Therefore, any minor modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A plastic-coated structure for a brushless motor stator, comprising an insulating plastic-coated body and a stator core; characterized in that: The insulating plastic coating body includes an annular ring body part. A plurality of T-shaped winding posts protrude integrally outward from the outer peripheral side wall of the ring body part, and the plurality of T-shaped winding posts are arranged at equal intervals in sequence along the circumferential direction; the stator iron core includes an inner stator iron core ring and a plurality of outer stator iron core sheets, and the inner stator iron core ring is arranged on the inner peripheral side wall of the ring body part; the T-shaped winding post includes a winding main body part and an arc-shaped plate part. One end of the winding main body part is integrally connected to the outer peripheral side wall of the ring body part, the arc-shaped plate part is integrally connected to the end of the winding main body part far from the ring body part, the arc-shaped plate part extends along the circumferential direction and is concave inward, and the two ends of the arc-shaped plate part in the circumferential direction respectively extend out of the two ends of the winding main body part. The outer stator iron core sheets are arc-shaped and are arranged on the outer side surface of the arc-shaped plate part; first R corners are arranged on the two pairs of sides at the upper end and the two pairs of sides at the lower end of the winding main body part, and second R corners are arranged at the two ends of the inner side surface of the arc-shaped plate part in the circumferential direction.

2. The plastic coating structure of the brushless motor stator according to claim 1, characterized in that: The upper and lower surfaces of the winding main body part are flush with the upper and lower surfaces of the ring body part respectively, and a third R corner is arranged at the connection between the winding main body part and the outer peripheral side wall of the ring body part.

3. A plastic-coated structure for a brushless motor stator according to claim 1, characterized in that: The upper and lower surfaces of the winding main body part are flush with the upper and lower surfaces of the arc-shaped plate part respectively, and a fourth R corner is arranged at the connection between the winding main body part and the arc-shaped plate part.

4. A plastic coating structure for a brushless motor stator according to claim 1, characterized in that: A pin convex part protrudes from the lower surface of the arc-shaped plate part. The pin convex part is provided with a pin hole, and a pin is installed in the pin hole. The lower end of the pin extends out of the lower end of the pin convex part.

5. A plastic-coated structure for a brushless motor stator according to claim 4, characterized in that: Six T-shaped winding posts are provided. Correspondingly, six outer stator iron core sheets, pin convex parts and pins are provided.

6. The plastic coating structure of a brushless motor stator according to claim 1, characterized in that: A plurality of arc-shaped grooves are arranged on the inner peripheral side wall of the inner stator iron core ring. The plurality of arc-shaped grooves are arranged at equal intervals in sequence along the circumferential direction, and the arc-shaped grooves extend along the axial direction and penetrate through the upper and lower ends of the inner stator iron core ring.

7. A plastic coating structure for a brushless motor stator according to claim 1, characterized in that: Annular bosses protrude from the sides of the upper and lower surfaces of the ring body part far from the winding main body part.

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