Brushless motor stator and winding structure thereof

Abstract

The brushless motor stator and the winding structure thereof comprise a stator framework and a winding pin, the stator framework comprises a mounting end face provided with a winding post, one end, far away from the mounting end face, of the winding post is provided with an insertion hole along the axis direction, the winding pin can be inserted into the insertion hole, and the winding post is provided with a hanging buckle part protruding out of the side peripheral wall of the winding post. A distance is reserved between the hanging and buckling part and the mounting end face of the stator framework, the hanging and buckling part is provided with a wire passing opening penetrating in the axis direction of the winding column, and an enameled wire on the stator framework passes through the wire passing opening of the hanging and buckling part and then is connected to the winding contact pin in a winding mode. According to the scheme, the winding post is arranged on the mounting end face of the stator framework, and the hanging and buckling part protruding out of the side peripheral wall of the winding post is arranged on the winding post, so that an enameled wire led out of the stator framework can be effectively supported and limited by the hanging and buckling part, and the problems that in the prior art, the enameled wire slips, so that the enameled wire is in poor contact with a winding contact pin, and the service life is prolonged are solved. And loosing and failure are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motor accessories, in particular to a brushless motor stator and a winding structure thereof. Background Art

[0002] At present, my country's automobile industry is developing rapidly, and the intelligence and automation of vehicles are becoming more and more mature, and more and more automatic actuators are used. Actuators generally need to be equipped with corresponding actuator motors.

[0003] Brushless motors have the advantages of low noise and good durability, so they are widely used as actuator motors. The main structure of a brushless motor includes a stator frame with a coil wound around it and a rotor made of magnetic material. The stator frame is provided with winding pins, and the lead ends of the enameled wire of the coil are wound around the winding pins to achieve power supply. After the coil is energized, a corresponding magnetic field is generated in the stator frame to achieve rotational drive of the rotor. However, the enameled wire of the coil of the stator frame often slips when it is wound around the winding pins, which leads to poor contact between the enameled wire and the winding pins, and loose failure. Utility Model Content

[0004] The utility model aims to solve the problem of poor contact and loose failure between the enameled wire of the stator frame and the winding pin in the prior art.

[0005] To solve the above problems, the utility model provides a brushless motor stator and a winding structure thereof, comprising a stator frame and a winding pin, the stator frame comprising a mounting end surface provided with a winding post, an end of the winding post away from the mounting end surface is provided with a socket for inserting the winding pin along the axial direction, the winding post is provided with a hook portion protruding from the side wall of the winding post, a spacing for the enameled wire to pass through is reserved between the hook portion and the mounting end surface of the stator frame, the hook portion has a wire passing opening penetrating along the axial direction of the winding post, the enameled wire on the stator frame passes through the wire passing opening of the hook portion and is then wound around the winding pin.

[0006] Compared with the prior art, the above scheme arranges a winding post on the mounting end face of the stator frame, and arranges a hook portion on the winding post that protrudes from the side wall of the winding post. Since a spacing is left between the hook portion and the mounting end face of the stator frame, the enameled wire led out from the stator frame can first be guided to the area between the mounting end face and the hook portion on the winding post, and then pass through the hook portion from the wire passing opening and be wound to the winding pin. At this time, the enameled wire on the winding pin can be effectively supported and limited by the hook portion, thereby avoiding the problem of poor contact with the winding pin and loose failure caused by slipping of the enameled wire in the prior art.

[0007] In an improved solution, there are three winding poles which are circumferentially spaced and distributed on the mounting end surface of the stator frame, so that the enameled wires led out of the stator frame can be adapted to the winding poles and winding pins at appropriate positions, and the layout is more reasonable.

[0008] In an improved solution, the three winding posts are arranged adjacent to each other, so that the distance between the three winding pins is closer, making power supply more convenient.

[0009] In an improved solution, a raised lead platform is provided at the mounting end surface of the stator frame corresponding to the position of the winding post, the winding post protrudes from the side of the corresponding lead platform away from the mounting end surface, and a lead groove is provided on the side peripheral wall of the lead platform extending to the side of the lead platform away from the mounting end surface. When the three winding posts are arranged adjacent to each other, part of the enameled wire led out of the stator frame will have a large corner when adapted to the winding post. Therefore, by adding a lead platform with a lead groove on the mounting end surface, the enameled wire with a large corner is guided by the lead groove, which effectively reduces the probability of the enameled wire breaking.

[0010] In an improved solution, each of the hook parts has two wire passing openings, and the two wire passing openings are respectively located on both sides of the hook part, so that the enameled wire can select a suitable wire passing opening to pass through as needed.

[0011] In an improved solution, the outer edge of the hook portion is provided with a chamfer, thereby effectively reducing the probability of the enameled wire getting hung or broken at the hook portion.

[0012] In an improved solution, the protruding distance of the hook portion relative to the side wall of the winding column is 2 to 3 times the wire diameter of the enameled wire, thereby achieving effective support and limiting of the enameled wire on the winding pin.

[0013] In an improved solution, the outer peripheral wall of the stator frame is provided with at least one mounting ear and at least one limiting ear, the mounting ear is provided with a mounting hole, the limiting ear is provided with a limiting hole, and the limiting hole has an opening that passes through the outer wall of the limiting ear. The presence of the opening makes the limiting hole have a larger error adaptation range, so that when assembling the stator frame, the fastening bolt can be first installed in the mounting hole of the mounting ear, and then the fastening bolt can be installed in the limiting hole of the limiting ear, thereby reducing the difficulty of assembly.

[0014] In an improved solution, there are two mounting ears and they are symmetrically distributed relative to the axis of the stator frame, and there are two limiting ears and they are symmetrically distributed relative to the axis of the stator frame, so that the layout is reasonable and the stability of the stator frame after assembly is ensured.

[0015] In an improved solution, it also includes a metal silicon steel sheet, the outer peripheral wall of the stator frame is provided with a plurality of circumferentially distributed limiting grooves, the metal silicon steel sheet is sleeved on the outer peripheral side of the stator frame, and the metal silicon steel sheet is provided with a limiting protrusion that is snap-fitted to the limiting grooves, so that the circumferential limiting function of the stator frame and the metal silicon steel sheet is realized through the snap-fit ​​cooperation between the limiting grooves and the limiting protrusions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of a brushless motor stator and its winding structure;

[0017] Figure 2 It is a front view schematic diagram of a brushless motor stator and its winding structure;

[0018] Figure 3 It is a top view schematic diagram of a brushless motor stator and its winding structure;

[0019] Figure 4 It is an overall schematic diagram of another embodiment of a brushless motor stator and its winding structure;

[0020] Figure 5 The figure is a top view of another embodiment of a brushless motor stator and its winding structure.

[0021] Description of reference numerals:

[0022] 1. Stator frame; 11. Mounting end face; 12. Limiting groove; 2. Winding pin; 3. Winding column; 31. Socket; 32. Buckle; 321. Wire passing port; 4. Lead platform; 41. Lead slot; 5. Mounting ear; 51. Mounting hole; 6. Limiting ear; 61. Limiting hole; 62. Opening; 7. Metal silicon steel sheet; 71. Limiting convex part. DETAILED DESCRIPTION

[0023] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art may make adjustments to them as needed to adapt to specific application scenarios.

[0024] In the description of the following embodiments, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0025] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] See also Figure 1-Figure 3 The embodiment of the utility model provides a brushless motor stator and its winding structure, including a stator frame 1 and a winding pin 2. The stator frame 1 includes a mounting end face 11 provided with a winding post 3. The end of the winding post 3 away from the mounting end face 11 is provided with a socket 31 for inserting the winding pin 2 along the axial direction. The winding post 3 is provided with a hook portion 32 protruding from the side wall of the winding post 3. A gap is left between the hook portion 32 and the mounting end face 11 of the stator frame 1 for the enameled wire to pass through. The hook portion 32 has a wire passing opening 321 passing through the axial direction of the winding post 3. The enameled wire on the stator frame 1 passes through the wire passing opening 321 of the hook portion 32 and is then wound around the winding pin 2.

[0028] The above scheme arranges a winding post 3 on the mounting end face 11 of the stator frame 1, and arranges a hook portion 32 on the winding post 3 that protrudes from the side wall of the winding post 3. Since a gap is left between the hook portion 32 and the mounting end face 11 of the stator frame 1, the enameled wire led out from the stator frame 1 can first be guided to the area between the mounting end face 11 and the hook portion 32 on the winding post 3, and then pass through the hook portion 32 from the wire passing opening 321 and be wound around the winding pin 2. At this time, the enameled wire on the winding pin 2 can be effectively supported and limited by the hook portion 32, thereby avoiding the problem of poor contact with the winding pin 2 and loose failure caused by slipping of the enameled wire in the prior art.

[0029] For a clearer explanation, Figure 2 As a reference, the axial direction of the stator frame 1 is vertical, and the mounting end face 11 refers to the upper end face of the stator frame 1; the end of the winding column 3 away from the mounting end face 11 refers to the upper end; the inner peripheral wall of the stator frame 1 has a plurality of coil groups distributed along the circumferential direction, and each coil group is used for winding the enameled wire.

[0030] In this embodiment, there are three winding poles 3 which are circumferentially spaced and distributed on the mounting end surface 11 of the stator frame 1, so that the enameled wire led out of the stator frame 1 can be adapted to the winding poles 3 and winding pins 2 at appropriate positions, and the layout is more reasonable.

[0031] The hook portion 32 with the wire passing opening 321 is generally fan-shaped, and the protruding distance of the hook portion 32 relative to the peripheral wall of the winding column 3 is preferably 2 to 3 times the wire diameter of the enameled wire, thereby achieving effective support and position limiting for the enameled wire on the winding pin 2. The outer edge of the hook portion 32 is chamfered, thereby effectively reducing the probability of the enameled wire getting hung or broken at the hook portion 32.

[0032] Regarding the assembly of the stator frame 1, the outer peripheral wall of the stator frame 1 is provided with at least one mounting ear 5 and at least one limiting ear 6, the mounting ear 5 is provided with a mounting hole 51, the limiting ear 6 is provided with a limiting hole 61, and the limiting hole 61 has an opening 62 that passes through the outer wall of the limiting ear 6. The existence of the opening 62 makes the limiting hole 61 have a larger error adaptation range, so that when the stator frame 1 is assembled, the fastening bolt can be first installed in the mounting hole 51 of the mounting ear 5, and then the fastening bolt can be installed in the limiting hole 61 of the limiting ear 6, thereby reducing the difficulty of assembly.

[0033] In this embodiment, there are two mounting ears 5 and they are symmetrically distributed relative to the axis of the stator frame 1, and there are two limiting ears 6 and they are symmetrically distributed relative to the axis of the stator frame 1, so that the layout is reasonable and the stability of the stator frame 1 after assembly is ensured.

[0034] Considering that the stator frame 1 needs to be equipped with an annular metal silicon steel sheet 7, the present embodiment provides a plurality of circumferentially distributed limiting grooves 12 on the outer peripheral wall of the stator frame 1, the metal silicon steel sheet 7 is sleeved on the outer peripheral side of the stator frame 1, and the metal silicon steel sheet 7 is provided with a limiting protrusion 71 snapped into the limiting groove 12, so that the circumferential limiting function of the stator frame 1 and the metal silicon steel sheet 7 is realized by the snap-fit ​​between the limiting groove 12 and the limiting protrusion 71. The material of the stator frame 1 is plastic, and the stator frame 1 is placed in a mold together with the metal silicon steel sheet 7 for injection molding during processing. Since the stator frame 1 and the metal silicon steel sheet 7 are circumferentially limited during injection molding, it is not easy to cause damage to the mold due to compression molding when the mold is closed.

[0035] like Figure 4 and Figure 5 As shown, in another embodiment, three winding posts 3 are arranged adjacent to each other, so that the distance between the three winding pins 2 is relatively close, and power supply is more convenient. Each of the hook portions 32 has two wire passing openings 321, and the two wire passing openings 321 are respectively located on both sides of the hook portion 32, so that the enameled wire can select a suitable wire passing opening 321 to pass through as needed.

[0036] Considering that when three winding posts 3 are arranged adjacent to each other, part of the enameled wire led out of the stator frame 1 will have a large corner when adapted to the winding posts 3, in this embodiment, a raised lead-in platform 4 can be further provided at the position corresponding to the winding posts 3 on the mounting end surface 11 of the stator frame 1, and the winding posts 3 protrude from the side of the corresponding lead-in platform 4 away from the mounting end surface 11, and the side peripheral wall of the lead-in platform 4 is provided with a lead-in groove 41 extending to the side of the lead-in platform 4 away from the mounting end surface 11. Therefore, by adding a lead-in platform 4 with a lead-in groove 41 on the mounting end surface 11, the enameled wire with a large corner is guided by the lead-in groove 41, and the probability of the enameled wire breaking is effectively reduced.

[0037] It should be noted that, in the description of the present application, the terms "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application. All directional indications (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0039] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A brushless motor stator and winding structure thereof, comprising a stator frame (1) and winding pins (2), characterized in that: The stator frame (1) comprises a mounting end surface (11) provided with a winding post (3); an end of the winding post (3) away from the mounting end surface (11) is provided with a plug hole (31) for inserting a winding pin (2) along the axial direction; the winding post (3) is provided with a hook portion (32) protruding from the side wall of the winding post (3); a space for the enameled wire to pass through is reserved between the hook portion (32) and the mounting end surface (11) of the stator frame (1); the hook portion (32) has a wire passing opening (321) penetrating along the axial direction of the winding post (3); the enameled wire on the stator frame (1) passes through the wire passing opening (321) of the hook portion (32) and is then wound around the winding pin (2).

2. A brushless motor stator and winding structure thereof according to claim 1, characterized in that: The winding poles (3) are three and are distributed at intervals along the circumferential direction on the mounting end surface (11) of the stator frame (1).

3. A brushless motor stator and winding structure thereof according to claim 2, characterized in that: The three winding poles (3) are arranged adjacent to each other.

4. A brushless motor stator and winding structure thereof according to claim 3, characterized in that: A raised lead platform (4) is provided at a position corresponding to the winding post (3) on the mounting end surface (11) of the stator frame (1); the winding post (3) protrudes from a side of the corresponding lead platform (4) away from the mounting end surface (11); and a side peripheral wall of the lead platform (4) is provided with a lead groove (41) extending to a side of the lead platform (4) away from the mounting end surface (11).

5. A brushless motor stator and winding structure thereof according to claim 3, characterized in that: Each of the hooking buckle portions (32) has two wire passing openings (321), and the two wire passing openings (321) are respectively located on two sides of the hooking buckle portion (32).

6. A brushless motor stator and winding structure thereof according to claim 1, characterized in that: The outer edge of the hook portion (32) is provided with a chamfer.

7. A brushless motor stator and winding structure thereof according to any one of claims 1 to 6, characterized in that: The protruding distance of the hook portion (32) relative to the side peripheral wall of the winding pole (3) is 2 to 3 times the wire diameter of the enameled wire.

8. A brushless motor stator and winding structure thereof according to claim 1, characterized in that: The outer peripheral wall of the stator frame (1) is provided with at least one mounting ear (5) and at least one limiting ear (6); the mounting ear (5) is provided with a mounting hole (51); the limiting ear (6) is provided with a limiting hole (61); and the limiting hole (61) has an opening (62) that passes through the outer wall of the limiting ear (6).

9. A brushless motor stator and winding structure thereof according to claim 8, characterized in that: There are two mounting ears (5) and they are symmetrically distributed relative to the axis of the stator frame (1); there are two limiting ears (6) and they are symmetrically distributed relative to the axis of the stator frame (1).

10. A brushless motor stator and winding structure thereof according to claim 1, characterized in that: It also includes a metal silicon steel sheet (7), the outer peripheral wall of the stator frame (1) is provided with a plurality of limiting grooves (12) distributed along the circumferential direction, the metal silicon steel sheet (7) is sleeved on the outer peripheral side of the stator frame (1), and the metal silicon steel sheet (7) is provided with a limiting protrusion (71) that is snap-fitted to the limiting groove (12).

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