Splicing type insulating framework for motor stator core

Abstract

The utility model discloses a splicing type insulation framework used for a motor stator core, comprising a first framework, one side of the first framework is provided with a second framework in a clamping manner, the first framework and the second framework are the same in specification, and attaching isolation mechanisms are arranged among the first framework, the second framework and a stator core block. And the whole framework is lighter and thinner through the attaching isolation mechanism, so that the slot fullness rate of the stator winding can be improved. According to the spliced insulating framework for the motor stator core, a part of materials, which are in contact with the stator core block, of the first framework and the second framework are removed, and lighter and thinner insulating paper is used for replacement, so that more space can be formed among the first framework, the second framework and the stator core block for winding windings; and meanwhile, the winding can conduct heat to the stator iron core block through the part without the material, and finally the heat is conducted to the motor shell for heat dissipation, so that the material of the framework is saved, and meanwhile, the heat dissipation efficiency of the motor and the slot fullness rate of winding are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and specifically to a splicing type insulating skeleton for a motor stator core. Background Art

[0002] The slot fill factor of a motor is an important performance index in the field of motor design and manufacturing. It reflects the ratio of the area occupied by the motor winding to the total area within the slot. A higher slot fill factor has a significant positive impact on the performance of the motor. Under specific design conditions, when the slot fill factor of the motor reaches its maximum value that can be wound, the physical length of the motor can be effectively shortened, thereby minimizing the volume of the motor. By increasing the slot fill factor of the motor, not only can the miniaturization of the motor be promoted, but also the amount of material used can be reduced, thereby reducing production costs. This is a direct and effective optimization approach.

[0003] In the existing motor technology, the slot fill factor of winding is restricted by the thickness of the insulating skeleton. With the increasing demand for motor miniaturization, the power density of the motor continues to increase, which requires a corresponding increase in the slot fill factor of the motor. A common method is to increase the slot space by reducing the thickness of the insulating skeleton, thereby increasing the slot fill factor. However, for the traditional front-back inserted type stator core insulating skeleton, due to material and injection molding process limitations, its thickness has approached the manufacturing limit. Further reducing the thickness not only has difficulties in molding, but also the thickening of the insulating skeleton will reduce the heat dissipation efficiency of the motor, thereby having an adverse impact on the temperature rise performance of the motor.

[0004] Although the use of advanced processing techniques can achieve the thinning of the integral injection molded skeleton, this method has some significant challenges. Firstly, the production cost is relatively high. Secondly, the complexity of the manufacturing process increases the production difficulty, thereby affecting the production efficiency of the motor. In addition, the instability of product quality also leads to a high scrap cost. On the other hand, the slot fill factor of the motor winding is also restricted by the shape of the stator core. In order to improve production efficiency, motor manufacturers usually use split type T-shaped punching sheet stator cores to manufacture prototypes, but this method will further reduce the slot fill factor of the motor, thereby affecting the overall performance and efficiency of the motor. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a splicing type insulating skeleton for a motor stator core, so as to solve the problems of inability to save costs and low qualified product rate during processing of the traditional insulating skeleton due to the slot fill factor of the stator winding in the above background art.

[0006] To achieve the above object, the present utility model provides the following technical solution: A spliced insulation skeleton for a motor stator core, including a first skeleton, a second skeleton is snap-fitted on one side of the first skeleton, and a stator core block is arranged between the second skeleton and the first skeleton. The stator core block is designed in a T shape, and both ends of the stator core block are designed in an arc shape. The outer surface of the stator core block is respectively attached to the outer surfaces of the second skeleton and the first skeleton, and windings are wound around the outer surfaces of the second skeleton and the first skeleton. The first skeleton and the second skeleton have the same specifications, and the directions are opposite when the first skeleton and the second skeleton are snap-fitted. A fitting and insulating mechanism is arranged between the first skeleton, the second skeleton and the stator core block. Through the fitting and insulating mechanism, the overall skeleton is made thinner and lighter, so that the slot fill factor of the stator winding can be improved.

[0007] Preferably, the fitting and insulating mechanism includes: a hollow groove, which is respectively opened on the outer surfaces of the first skeleton and the second skeleton, and the first skeleton and the second skeleton are penetrated by the stator core block. An insulating paper is arranged between the stator core block and the first skeleton and the second skeleton, and a part of the outer surface of the insulating paper is attached to the hollow groove.

[0008] Adopting the above technical solution can effectively reduce the thickness of the first skeleton and the second skeleton, remove the materials in contact with the concave parts of the first skeleton, the second skeleton and the stator core block, save materials and improve the slot fill factor of the stator winding. At the same time, the exposed stator core block can better absorb the heat of the winding and improve the heat dissipation capacity of the motor.

[0009] Preferably, a fastening mechanism is arranged between the first skeleton and the second skeleton. Through the fastening mechanism, it is more convenient to install the first skeleton and the second skeleton on the stator core block, reduce the installation difficulty and improve the production efficiency.

[0010] Adopting the above technical solution can improve the installation efficiency of the first skeleton and the second skeleton on the stator core block, and improve the production efficiency through the design of splicing and inserting.

[0011] Preferably, the fastening mechanism includes: an iron core insertion block, which is fixedly arranged on the side surface of one end of the stator core block close to the first skeleton, and an iron core insertion slot is opened on the outer surface of one end of the stator core block close to the second skeleton, and the iron core insertion slot is engaged with the iron core insertion block. Insertion concave blocks are fixedly installed on the outer surfaces of both ends of the first skeleton, and insertion convex blocks are arranged on the outer surfaces of both ends of the second skeleton, and the insertion convex blocks are engaged with the insertion concave blocks.

[0012] Adopting the above technical solution, the stator can be integrally assembled after the winding is completed. Through the docking of the iron core inserts and the iron core slots, the stator iron core blocks are connected to form a circle, and then the circular stator iron core blocks can be inserted into the motor housing, reducing the inconvenience during winding and improving production efficiency.

[0013] Preferably, connection crimping surfaces are provided on both sides of the first skeleton and the second skeleton close to the hollow groove, and the side surfaces of the connection crimping surfaces are attached to the outer surface of the insulating paper, and the insulating paper is attached to the side surface of the stator iron core block.

[0014] Adopting the above technical solution, the insulating paper can be tightened through the connection crimping surface to reduce the wrinkles generated when it is attached to the stator iron core block, so that the stator iron core block and the insulating paper can be attached more closely, and the winding will not contact the stator iron core block, reducing the short circuit caused by winding scratching.

[0015] Preferably, a limiting mechanism is provided between the first skeleton and the second skeleton: when the winding is wound on the first skeleton and the second skeleton through the limiting mechanism, the winding can be arranged neatly and will not contact the stator iron core block.

[0016] Adopting the above technical solution, the winding can be arranged neatly during winding, reducing the loss generated by eddy current, and enabling the potting adhesive to enter evenly between the windings to reduce the generation of bubbles between the potting adhesive and the windings.

[0017] Preferably, the limiting mechanism includes: limiting blocks, which are respectively arranged on the outer surfaces of both ends of the first skeleton and the second skeleton, and blocking plates are fixedly installed on the outer surfaces of both ends of the first skeleton and the second skeleton, and a wire winding groove is provided at one end of the blocking plate close to the inserted protruding block, and the other wire winding groove is located between the inserted recessed block and the blocking plate. The outer surfaces of both ends of the first skeleton and the second skeleton are evenly provided with positioning recessed grooves, and the positioning recessed grooves are located between the limiting blocks and the blocking plates.

[0018] Adopting the above technical solution, when winding the winding, the enameled wire of the winding will be blocked by the limiting blocks, inserted protruding blocks, inserted recessed blocks and blocking plates, so that the enameled wire will not contact and scratch the stator iron core block when passing through the wire winding groove, which can improve the winding speed of the winding and reduce the probability of winding short circuit damage.

[0019] Compared with the prior art, the beneficial effects of the present utility model are: the split insulating skeleton for the motor stator iron core:

[0020] 1. The first and second skeletons have removed a part of the material in contact with the stator core block and replaced it with a thinner and lighter insulating paper. This allows for more space between the first and second skeletons and the stator core block to wind the winding. At the same time, the part where the material is removed enables the winding to conduct heat to the stator core block and finally to the motor housing for heat dissipation. This saves the material of the skeleton and improves the heat dissipation efficiency of the motor and the slot fill factor of the winding.

[0021] 2. During assembly, the insulating paper can be placed in the hollow groove. Then, the first and second skeletons are pushed towards the stator core block. Through the engagement of the inserted protruding block and the inserted recessed block, the first and second skeletons are docked and fixed on the outer surface of the stator core block. After that, the winding is wound around the outer surfaces of the first and second skeletons. Then, the stator core blocks can be interconnected through the core insertion block and the core slot. Subsequently, the assembled stator core blocks are installed into the motor housing, improving the installation efficiency of the skeleton, enhancing the overall assembly speed of the motor, and reducing the trouble of winding the winding.

[0022] 3. The positioning recessed groove enables the winding to be wound neatly during winding, improving the overall aesthetic appearance. The inserted protruding block, the inserted recessed block, the blocking plate, and the positioning recessed groove can effectively prevent the enameled wire of the winding from scratching the stator core block during winding, causing damage to the insulation layer, improving the efficiency of winding the winding, enabling the winding to be wound neatly, reducing the loss caused by eddy currents, and allowing the glue to enter the winding during potting and reducing the generation of air bubbles. Description of the Drawings

[0023] Figure 1 Schematic three-dimensional structure diagram of the second skeleton and the winding of the present utility model;

[0024] Figure 2 Schematic exploded three-dimensional sectional structure diagram of the stator core block and the insulating paper of the present utility model;

[0025] Figure 3 Schematic exploded three-dimensional structure diagram of the second skeleton and the stator core block of the present utility model;

[0026] Figure 4 Schematic three-dimensional structure diagram of the first and second skeletons of the present utility model;

[0027] Figure 5 Schematic three-dimensional structure diagram of the limit block and the blocking plate of the present utility model;

[0028] Figure 6 Schematic three-dimensional structure diagram of the core insertion block and the core slot of the present utility model.

[0029] In the figure: 1. First skeleton; 2. Second skeleton; 3. Hollow groove; 4. Stator iron core block; 5. Iron core insertion block; 6. Iron core slot; 7. Insertion protruding block; 8. Insertion recessed block; 9. Insulating paper; 10. Limit block; 11. Baffle plate; 12. Connecting crimping surface; 13. Positioning recessed groove; 14. Winding groove; 15. Winding. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1-6 , the present invention provides a technical solution: a splicing type insulating skeleton for a motor stator iron core, including a first skeleton 1, a second skeleton 2 is snap-fitted on one side of the first skeleton 1, and a stator iron core block 4 is arranged between the second skeleton 2 and the first skeleton 1. The stator iron core block 4 is designed in a T shape, and both ends of the stator iron core block 4 are designed in a circular arc shape. The outer surfaces of the stator iron core block 4 are respectively attached to the outer surfaces of the second skeleton 2 and the first skeleton 1, and the outer surfaces of the second skeleton 2 and the first skeleton 1 are wound with a winding 15. The first skeleton 1 and the second skeleton 2 have the same specifications, and the directions are opposite when the first skeleton 1 and the second skeleton 2 are snap-fitted.

[0032] The T-shaped design of the stator iron core block 4 enables the winding 15 to be wound to the greatest extent, and the arc-shaped design at both ends of the stator iron core block 4 can better fit with the motor housing and prevent scratching with the rotor.

[0033] A fitting isolation mechanism is arranged between the first skeleton 1, the second skeleton 2 and the stator iron core block 4. Through the fitting isolation mechanism, the overall skeleton is made thinner and lighter, and the slot filling rate of the stator winding can be improved. The fitting isolation mechanism includes: a hollow groove 3, the hollow groove 3 is respectively opened on the outer surfaces of the first skeleton 1 and the second skeleton 2, and the first skeleton 1 and the second skeleton 2 are penetrated by the stator iron core block 4. An insulating paper 9 is arranged between the stator iron core block 4 and the first skeleton 1 and the second skeleton 2, and a part of the outer surface of the insulating paper 9 is attached to the hollow groove 3.

[0034] Through the design of the hollow groove 3, the thickness between the first skeleton 1, the second skeleton 2 and the stator iron core block 4 is reduced, so that the winding 15 can be wound more on the outer surfaces of the first skeleton 1 and the second skeleton 2, and the heat generated during the operation of the winding 15 can be conducted to the stator iron core block 4 and dissipated through the motor housing, saving materials and improving the slot filling rate during stator winding.

[0035] A fastening mechanism is provided between the first skeleton 1 and the second skeleton 2. By means of the fastening mechanism, when the first skeleton 1 and the second skeleton 2 are installed on the stator core block 4, it is more convenient, the installation difficulty is reduced, and the production efficiency is improved.

[0036] During assembly, the insulating paper 9 needs to be placed at the hollow grooves 3 of the first skeleton 1 and the second skeleton 2 so that the insulating paper 9 can completely cover the hollow grooves 3. Subsequently, the first skeleton 1 and the second skeleton 2 can be pushed towards the stator core block 4. Through the fastening of the insertion protruding block 7 and the insertion recessed block 8, the first skeleton 1 and the second skeleton 2 are fixed on the outer surface of the stator core block 4, reducing the cumbersome steps of installing the first skeleton 1 and the second skeleton 2 and effectively improving the production efficiency.

[0037] The fastening mechanism includes: a core insertion block 5 which is fixedly arranged on the side surface of one end of the stator core block 4 close to the first skeleton 1. And on the outer surface of one end of the stator core block 4 close to the second skeleton 2, a core slot 6 is provided, and the core slot 6 is engaged with the core insertion block 5. On the outer surfaces of both ends of the first skeleton 1, insertion recessed blocks 8 are fixedly installed. On the outer surfaces of both ends of the second skeleton 2, insertion protruding blocks 7 are provided, and the insertion protruding blocks 7 are engaged with the insertion recessed blocks 8

[0038] After the winding 15 is wound around the outer surfaces of the first skeleton 1 and the second skeleton 2, the stator core block 4 can be assembled through the core insertion block 5 and the core slot 6 to form the stator core block 4 into a circle. Subsequently, the stator core block 4 can be installed into the motor housing, so that the winding 15 does not need to be wound inside the motor housing, reducing the difficulty of winding the winding 15.

[0039] On both sides of the first skeleton 1 and the second skeleton 2 close to the hollow grooves 3, there are connecting crimping surfaces 12, and the side surfaces of the connecting crimping surfaces 12 are attached to the outer surface of the insulating paper 9, and the insulating paper 9 is attached to the side surface of the stator core block 4.

[0040] Through the extrusion of the connecting crimping surface 12, when the insulating paper 9 is attached to the stator core block 4, it can be more flat and conforming without wrinkles. At the same time, the insulating paper 9 can effectively prevent the enameled wire from contacting and scratching the stator core block 4 when the winding 15 is wound, resulting in damage to the insulating layer.

[0041] A limiting mechanism is provided between the first skeleton 1 and the second skeleton 2: By means of the limiting mechanism, when the winding 15 is wound around the first skeleton 1 and the second skeleton 2, the winding arrangement can be made neat and does not contact the stator core block 4.

[0042] By positioning the recessed groove 13, the winding 15 can be neatly arranged on the outer surfaces of the first skeleton 1 and the second skeleton 2 during winding, reducing the eddy current loss generated during operation, enabling the potting encapsulation glue to fully contact the winding to reduce the generation of bubbles, and reducing the risk of insulation breakdown.

[0043] The limiting mechanism includes: limiting blocks 10 which are respectively arranged on the outer surfaces of the two ends of the first skeleton 1 and the second skeleton 2. Block plates 11 are fixedly installed on the outer surfaces of the two ends of the first skeleton 1 and the second skeleton 2. A wire winding groove 14 is arranged at one end of the block plate 11 close to the inserted convex block 7, and another wire winding groove 14 is located between the inserted concave block 8 and the block plate 11. Positioning recessed grooves 13 are evenly arranged on the outer surfaces of the two ends of the first skeleton 1 and the second skeleton 2, and the positioning recessed grooves 13 are located between the limiting blocks 10 and the block plates 11.

[0044] Through the inserted convex block 7, the inserted concave block 8, the limiting block 10 and the block plate 11, the winding 15 will not contact the outer surface of the stator iron core block 4 during winding, and the enameled wire of the winding 15 is restricted inside the first skeleton 1 and the second skeleton 2, so that the winding 15 will not run out when winding through the wire winding groove 14, improving the efficiency of winding the winding 15.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spliced insulation skeleton for a motor stator core, comprising a first skeleton (1), a second skeleton (2) is snap-fitted on one side of the first skeleton (1), and a stator core block (4) is arranged between the second skeleton (2) and the first skeleton (1). The stator core block (4) is designed in a T shape, and both ends of the stator core block (4) are designed in an arc shape. The outer surfaces of the stator core block (4) are respectively attached to the outer surfaces of the second skeleton (2) and the first skeleton (1), and windings (15) are wound around the outer surfaces of the second skeleton (2) and the first skeleton (1). The first skeleton (1) and the second skeleton (2) have the same specifications, and the directions are opposite when the first skeleton (1) and the second skeleton (2) are snap-fitted. It is characterized in that: A fitting and isolating mechanism is provided between the first skeleton (1), the second skeleton (2) and the stator core block (4). Through the fitting and isolating mechanism, the overall skeleton is made thinner and lighter, so that the slot fill factor of the stator winding can be improved.

2. The split-type insulation skeleton for the motor stator core according to claim 1, wherein: The fitting and isolating mechanism includes: a hollow groove (3). The hollow grooves (3) are respectively formed on the outer surfaces of the first skeleton (1) and the second skeleton (2), and the first skeleton (1) and the second skeleton (2) are penetrated by the stator core block (4). An insulating paper (9) is provided between the stator core block (4) and the first skeleton (1) and the second skeleton (2), and a part of the outer surface of the insulating paper (9) is fitted to the hollow groove (3).

3. The split-type insulating skeleton for a motor stator core according to claim 1, characterized in that: A fastening mechanism is provided between the first skeleton (1) and the second skeleton (2). Through the fastening mechanism, when the first skeleton (1) and the second skeleton (2) are installed on the stator core block (4), it is more convenient, the installation difficulty is reduced, and the production efficiency is improved.

4. The spliced insulation skeleton for the motor stator core according to claim 3, characterized in that: The fastening mechanism includes: an iron core insert block (5). The iron core insert block (5) is fixedly arranged on the side surface of one end of the stator core block (4) close to the first skeleton (1), and an iron core slot (6) is formed on the outer surface of one end of the stator core block (4) close to the second skeleton (2), and the iron core slot (6) is engaged with the iron core insert block (5). Insertion recessed blocks (8) are fixedly installed on the outer surfaces of both ends of the first skeleton (1), and insertion protruding blocks (7) are arranged on the outer surfaces of both ends of the second skeleton (2), and the insertion protruding blocks (7) are engaged with the insertion recessed blocks (8).

5. The split-type insulating skeleton for the motor stator core according to claim 1, wherein: Connecting and pressing surfaces (12) are provided on both sides of the first skeleton (1) and the second skeleton (2) close to the hollow groove (3), and the side surface of the connecting and pressing surface (12) is fitted to the outer surface of the insulating paper (9), and the insulating paper (9) is fitted to the side surface of the stator core block (4).

6. The spliced insulation skeleton for the motor stator core according to claim 1, wherein: A limiting mechanism is provided between the first skeleton (1) and the second skeleton (2). When the winding (15) is wound around the first skeleton (1) and the second skeleton (2) through the limiting mechanism, the winding arrangement can be made neat and will not contact the stator core block (4).

7. The spliced insulation skeleton for the motor stator core according to claim 6, characterized in that: The limiting mechanism includes: limiting blocks (10). The limiting blocks (10) are respectively arranged on the outer surfaces of both ends of the first skeleton (1) and the second skeleton (2), and blocking plates (11) are fixedly installed on the outer surfaces of both ends of the first skeleton (1) and the second skeleton (2), and a winding groove (14) is arranged at one end of the blocking plate (11) close to the insertion protruding block (7). The other winding groove (14) is located between the insertion recessed block (8) and the blocking plate (11). Positioning recessed grooves (13) are uniformly arranged on the outer surfaces of both ends of the first skeleton (1) and the second skeleton (2), and the positioning recessed grooves (13) are located between the limiting blocks (10) and the blocking plates (11).

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