Improved construction of stator shot wrap wire sleeve

Abstract

The utility model discloses a structure improved stator shot package wire sleeve, including insulation fixed ring and the integrated molding of several T shape structure's insulation winding skeleton in the circumference outside of insulation fixed ring, the integrated molding has several insulation winding post on insulation fixed ring or insulation winding skeleton, the circumference outside surface of insulation winding post is fixed and covered with the conductive sleeve of conductive material, and the wire head of the coil that is arranged on each insulation winding skeleton outside can be wound and welded in the conductive sleeve outside of insulation winding post, the utility model discloses one aspect avoided the design winding post jack on the plastic piece of stator shot package winding, also realized the stable positioning of winding post in stator shot package winding sleeve, can also realize the winding and conduction connection of the enameled wire head tail of stator coil on winding, can then smoothly realize the smooth manufacturing of the stator of iron core diameter not greater than 8mm, is favorable to realize the miniaturization development of motor.

Description

Technical Field

[0001] This utility model relates to a stator, and more particularly to a stator injection winding sleeve with improved structure. Background Technology

[0002] Generally, the injection-molded winding sleeve forms a winding post insertion hole 5 on the injection molded part, and then a metal winding post 6 is fixedly inserted into the winding post insertion hole by interference fit. The enameled wire of the stator coil is wound around the outside of the metal winding post. The metal winding posts are fixed and connected to each other by processes such as soldering, and then electrically connected to the control circuit board to form an energized coil that drives the motor to run.

[0003] The injection-molded winding sleeve assembly method requires sufficient plastic thickness in the injection-molded part, while the metal winding post cannot be too thin. This is because the diameter of the insertion hole for the injection-molded winding post is difficult to be less than 0.3mm, and if the metal winding post is too thin, it will not be able to be inserted into the insertion hole of the winding post on the plastic part due to insufficient strength. Therefore, the smallest diameter of the winding post currently is 0.3mm.

[0004] With the development of motor miniaturization, the injection winding sleeve no longer has space to leave a winding post insertion hole with a diameter greater than or equal to 0.3mm, which restricts the miniaturization design of motors and makes it difficult to manufacture stators with a core diameter of no more than 8mm. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a stator injection winding sleeve with improved structure. This improved stator injection winding sleeve avoids the need to open winding post insertion holes on plastic parts, and realizes the smooth manufacturing of stators with core diameter not exceeding 8mm.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a stator injection winding sleeve with improved structure, including an insulating fixing ring and several T-shaped insulating winding skeletons integrally formed on the outer circumference of the insulating fixing ring. Several insulating winding posts are integrally formed on the insulating fixing ring or the insulating winding skeleton. A conductive sleeve of conductive material is fixedly covered on the outer circumference of the insulating winding post. The wire ends of the coils wound on the outer side of each insulating winding skeleton can be wound and welded to the outer side of the conductive sleeve of the insulating winding post.

[0007] As a further improvement of this utility model, the insulating winding post is integrally formed on the insulating fixing ring, and one end of the insulating winding post extends to a predetermined length at one axial end of the insulating fixing ring, and the conductive sleeve is fixedly sleeved on the outer side of the portion of the insulating winding post that extends to one axial end of the insulating fixing ring.

[0008] As a further improvement of this utility model, the insulating winding post is integrally formed on the outer circumference of the insulating fixing ring, and each insulating winding post is located in the gap between adjacent insulating winding skeletons, and the height of the other end of the insulating winding post is lower than the end face of the other end of the insulating fixing ring.

[0009] As a further improvement of this utility model, the insulating winding post is a cylindrical structure, which is connected to the outer circumference of the insulating fixing ring through a rounded corner surface.

[0010] As a further improvement of this utility model, the inner ring surface of the insulating fixing ring is a cylindrical surface, the outer ring surface of the insulating fixing ring is a polygonal prism surface, and each insulating winding skeleton is correspondingly arranged on the axial plane of the polygonal prism surface, and the insulating winding post is located at the edge position of the polygonal prism surface.

[0011] As a further improvement of this utility model, the diameter of the portion of the insulating winding post extending outward from one end of the insulating fixing ring is not less than 0.1 mm.

[0012] As a further improvement of this utility model, the conductive sleeve is a ring structure or a cap-like structure with one end closed axially.

[0013] As a further improvement of this utility model, the conductive sleeve is a copper sleeve.

[0014] As a further improvement of this utility model, the conductive sleeve is fixedly combined with the insulating winding post by means of electroplating, fusion welding, welding, injection molding and gluing.

[0015] The beneficial effects of this utility model are as follows: This utility model integrally forms an insulating winding post on the plastic part of the stator injection winding sleeve, and covers the insulating winding post with a conductive sleeve of metal material to form a winding post with conductive function. This avoids designing winding post insertion holes on the plastic part of the stator injection winding, and achieves stable positioning of the winding post on the stator injection winding sleeve. It also enables the winding and conductive connection of the enameled wire ends of the stator coil on the winding wire. This utility model can successfully realize the manufacturing of stators with a core diameter of no more than 8mm, which is conducive to the miniaturization of motors. Attached Figure Description

[0016] Figure 1 A schematic diagram of the traditional assembly method for stator winding columns;

[0017] Figure 2 This is a first perspective view of the stator injection winding sleeve of this utility model;

[0018] Figure 3 This is a second perspective view of the stator injection winding sleeve of this utility model;

[0019] Figure 4This is a front view of the stator injection winding sleeve of this utility model;

[0020] Figure 5 This is a bottom view of the stator injection winding sleeve of this utility model;

[0021] Figure 6 This is a right view of the stator injection winding sleeve of this utility model;

[0022] Figure 7 This is a rear view of the stator injection winding sleeve of this utility model;

[0023] Figure 8 This is a diagram showing the stator injection winding sleeve of this utility model without the conductive sleeve installed.

[0024] Figure 9 This is a perspective view of the conductive sleeve with a ring structure according to this utility model;

[0025] Figure 10 This is a perspective view of the conductive sleeve with the cap-like structure of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the detailed description of the embodiments of this utility model provided below is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Example: An improved stator injection winding sleeve includes an insulating fixing ring 1 and several T-shaped insulating winding skeletons 2 integrally formed on the outer circumference of the insulating fixing ring 1. Several insulating winding posts 3 are integrally formed on the insulating fixing ring 1 or the insulating winding skeleton 2. A conductive sleeve 4 of conductive material is fixedly covered on the outer circumference of the insulating winding post 3. The wire ends of the coils wound on the outer side of each insulating winding skeleton 2 can be wound and welded to the outer side of the conductive sleeve 4 of the insulating winding post 3.

[0028] When the stator injection winding sleeve is injection molded, an insulated winding post 3 is integrally formed on it. Then, by covering the outside of the insulated winding post 3 with a conductive sleeve 4, the surface of the insulated winding post 3 becomes conductive. In this way, after the end of the coil wound on the outside of the insulated winding frame 2 is wound around the surface of the conductive sleeve 4 on the outside of the insulated winding post 3 and welded and fixed, the coil and the conductive sleeve 4 are electrically connected. Then, the conductive sleeve 4 is electrically connected to the control circuit board to form an energized coil that drives the motor. The above structure avoids forming riveting holes on the end face of the insulated winding frame 2 or the insulated fixing ring 1, and avoids interference riveting positioning between the metal winding post and the riveting hole on the stator injection winding sleeve. It can realize the manufacturing and molding of smaller stators and improve the stable molding of winding posts on extremely small stators. The conductive sleeve 4 made of metal material covering the outside of the small winding post can also strengthen the winding post and prevent the winding post from breaking during winding.

[0029] The insulating winding post 3 is integrally formed on the insulating fixing ring 1, with one end of the insulating winding post 3 extending a predetermined length beyond the axial end of the insulating fixing ring 1. The conductive sleeve 4 is fixedly sleeved on the outer side of the portion of the insulating winding post 3 that extends beyond the axial end of the insulating fixing ring 1. Integrating the insulating winding post 3 integrally onto the insulating fixing ring 1 allows for a reduction in the thickness of the rubber coating on the stator core at the insulating winding frame 2, achieving simultaneous reduction in both the radial and axial dimensions of the stator. Furthermore, the integral forming of the insulating winding post 3 onto the insulating fixing ring 1 facilitates molding and demolding, and does not affect the winding of the coil on the insulating winding frame 2.

[0030] The insulating winding post 3 is integrally formed on the outer circumference of the insulating fixing ring 1, and each insulating winding post 3 is located in the gap between adjacent insulating winding skeletons 2. The other end of the insulating winding post 3 is lower than the end face of the other end of the insulating fixing ring 1. A considerable length of the insulating winding post 3 is integrated with the outer circumference of the insulating fixing ring 1, which enhances the strength of the insulating winding post 3 and makes it less prone to breakage under stress.

[0031] The insulating winding post 3 is a cylindrical structure, which connects to the outer circumference of the insulating fixing ring 1 through rounded corners. This structure enhances the connection strength between the insulating winding post 3 and the outer circumference of the insulating fixing ring 1, further increasing the strength of the insulating winding post 3, making it less prone to breakage and damage, and facilitating molding and demolding. In addition to being cylindrical, the winding post can also be a polygonal prism. The conductive sleeve 4 can be cylindrical, or it can be a polygonal columnar structure such as a triangular prism or a square prism.

[0032] The inner ring surface of the insulating fixing ring 1 is cylindrical, and the outer ring surface is polygonal. Each insulating winding frame 2 is correspondingly located on the axial plane of the polygonal surface, and the insulating winding post 3 is located at the edge of the polygonal surface. The cylindrical inner ring surface of the insulating fixing ring 1 can perfectly match the inner ring of the iron core, which is beneficial for the installation of the stator on the outside of the inner shaft of the motor. The prismatic outer ring surface of the insulating fixing ring 1 ensures that there is enough space between the insulating winding frames 2 to accommodate the coil, while increasing the contact area and contact strength between the winding post and the edge of the insulating fixing ring 1.

[0033] The diameter of the portion of the insulating winding post 3 extending outward from one axial end of the insulating fixing ring 1 is not less than 0.1 mm.

[0034] The conductive sleeve 4 is a ring structure (with a through hole in the inner hole) or a cap-shaped structure with one end closed in the axial direction (with a blind hole in the inner hole). After the ring structure or the cap-shaped structure of the conductive sleeve 4 is assembled on the outside of the insulating winding post 3, the only difference is whether the end face of the insulating winding post 3 is covered with conductive material. This has no effect on the winding and welding of the coil wire end. The only difference is that when the conductive sleeve 4 is electrically connected to the control circuit board, the ring structure can only be connected through the outer circumference, while the cap-shaped structure can be electrically connected through the outer circumference or through the bottom end face of the cap.

[0035] The conductive sleeve 4 is made of copper. Copper has good electrical conductivity and fast heat dissipation, making it an ideal electrical connection material. Alternatively, other metal materials can be used to make the conductive sleeve 4, such as aluminum sleeves, titanium alloy sleeves, etc.

[0036] The conductive sleeve 4 is fixedly combined with the insulating winding post 3 by electroplating, fusion welding, welding, injection molding and gluing. The conductive sleeve 4 is fixed to the outside of the insulating winding post 3 by various methods, each with its own characteristics. For example, electroplating can make the conductive sleeve 4 very thin, reducing the space it occupies. Injection molding can achieve one-piece injection molding in the injection mold, improving production efficiency. Welding, welding and gluing are convenient for small batch production.

[0037] The stator manufacturing method using the improved stator injection winding sleeve comprises the following steps:

[0038] Step 1: Prepare the stator core;

[0039] Step 2: Place the stator core into the injection mold, and integrally form the stator injection winding sleeve on the outside of the stator core through in-mold injection molding. The insulating fixing ring 1 of the stator injection winding sleeve is integrally formed on both sides of the inner ring of the stator core. The insulating winding skeleton 2 of the stator injection winding sleeve is integrally formed and covers the outside of the winding skeleton of the stator core that radiates radially from the inner ring outward. The insulating winding post 3 is integrally formed on the insulating fixing ring 1 or the insulating winding skeleton 2.

[0040] Step 3: Fix the conductive metal sleeve 4 to the outside of one axial end of the insulating winding post 3, which extends out of the insulating fixing ring 1.

Claims

1. An improved stator injection winding sleeve, comprising an insulating retaining ring (1) and a plurality of T-shaped insulating winding skeletons (2) integrally formed on the outer side of the circumference of the insulating retaining ring, characterized in that: A plurality of insulating winding posts (3) are integrally formed on the insulating fixing ring or insulating winding skeleton. A conductive sleeve (4) of conductive material is fixedly covered on the outer circumference of the insulating winding post. The wire ends of the coils wound on the outer side of each insulating winding skeleton can be wound and welded to the outer side of the conductive sleeve of the insulating winding post.

2. The improved stator injection winding sleeve according to claim 1, characterized in that: The insulating winding post is integrally formed on the insulating fixing ring, and one end of the insulating winding post extends to a predetermined length at one axial end of the insulating fixing ring. The conductive sleeve is fixedly sleeved on the outer side of the portion of the insulating winding post that extends to one axial end of the insulating fixing ring.

3. The improved stator injection winding sleeve according to claim 2, characterized in that: The insulating winding post is integrally formed on the outer circumference of the insulating fixing ring, and each insulating winding post is located in the gap between adjacent insulating winding skeletons. The height of the other end of the insulating winding post is lower than the end face of the other end of the insulating fixing ring.

4. The improved stator injection winding sleeve according to claim 3, characterized in that: The insulating winding post has a cylindrical structure, which is connected to the outer circumference of the insulating fixing ring through its rounded corner surface.

5. The improved stator injection winding sleeve according to claim 3, characterized in that: The inner ring surface of the insulating fixing ring is a cylindrical surface, and the outer ring surface of the insulating fixing ring is a polygonal prism surface. Each insulating winding skeleton is correspondingly arranged on the axial plane of the polygonal prism surface, and the insulating winding post is located at the edge of the polygonal prism surface.

6. The improved stator injection winding sleeve according to claim 2 or 3, characterized in that: The diameter of the portion of the insulated winding post extending outward from one end of the insulated fixing ring shall not be less than 0.1 mm.

7. The improved stator injection winding sleeve according to claim 1, characterized in that: The conductive sleeve is a ring structure or a cap-like structure closed at one end along the axial direction.

8. The improved stator injection winding sleeve according to claim 1, characterized in that: The conductive sleeve is a copper sleeve.

9. The improved stator injection winding sleeve according to claim 1, characterized in that: The conductive sleeve is fixedly bonded to the insulating winding post by means of electroplating, fusion welding, welding, injection molding and gluing.

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