Motor stator and motor

Abstract

The utility model relates to the technical field of motors, in particular to a motor stator and a motor. Comprising an annular stator iron core ring and an iron core tooth assembly installed on the stator iron core ring, the iron core tooth assembly is sleeved with a winding coil, and the iron core tooth assembly comprises an iron core tooth body and iron core tooth end blocks installed at the two ends of the iron core tooth body; positioning holes are formed in the two ends of the iron core tooth body respectively; a positioning column is integrally formed on a plane where the iron core tooth end block is matched with the core tooth body; and the positioning column is inserted into the positioning hole of the iron core tooth body. The positioning column is inserted into the positioning hole of the iron core tooth body, so that the problem that the iron core tooth end block slips off when a winding coil is assembled can be avoided.

Description

A motor stator and motor Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor stator and a motor. Background Technology

[0002] As the core electromechanical device for converting electrical energy characteristics, electric motors are widely used in various economic sectors such as industry, agriculture, national defense, public utilities, and household appliances. With the increasing application rate of electric motors year by year, higher requirements are being placed on the efficiency, automation of production processes, and reliability of electric motors.

[0003] In the field of motors, copper wire is generally divided into round copper wire or flat copper wire. Round copper wire is usually directly wound and then embedded in the iron core slot. In order to reduce the eddy current loss of the iron core, the iron core is generally made of 0.15mm to 0.5mm surface-insulated silicon steel sheets stacked together. Flat copper wire can be bent and then fitted onto the split iron core teeth, or it can be pre-formed and inserted into the motor slot from the axis (Hair-pin, I-pin). The copper wire embedded in the iron core slot is the main one that generates electromagnetic torque. The copper wire outside the iron core slot (end) only serves to connect the copper wire inside the slot and will generate additional resistance loss. Therefore, reducing the winding end is of great significance for improving motor efficiency.

[0004] To facilitate the housing of the coil end, existing technologies, such as patent application CN104426253A, disclose a high power density motor stator core structure, which includes a stator core body and a stator core end. The stator core end is made of a soft magnetic material with high resistivity and high permeability, such as soft magnetic composite material (SMC). One side of the stator core end that mates with the stator core body is a planar structure with a cross-section identical to that of the stator core body. The other side has a protruding planar baffle at its center and protruding planar baffles on its circumference, forming a recess between the baffles to accommodate the coil end.

[0005] The core body in the existing CN104426253A is an integral structure, that is, the core teeth are integrally formed on the middle annular body, and the corresponding stator core end is also an integral structure, with the end structure corresponding to each core tooth also integrally formed on the middle annular body of the stator core end.

[0006] Currently, some stator core teeth also adopt a split structure. For example, patent CN210629205U discloses a servo motor stator core, including a supporting outer ring, a plurality of stator core teeth, and a supporting inner ring. The plurality of stator core teeth are sequentially arranged inside the supporting outer ring and are circumferentially distributed along the circumference of the supporting outer ring. The supporting inner ring is placed inside the plurality of circumferentially distributed stator core teeth and forms synchronous support for the inner sides of the plurality of stator core teeth.

[0007] When the core teeth on the stator adopt a split structure, the end structure corresponding to each core tooth also adopts a split structure. Therefore, the following problem exists: when assembling the coil, the split end structure is easy to slip off the core teeth, making coil assembly difficult. Summary of the Invention

[0008] The main purpose of this utility model is to provide a motor stator and a motor, which aims to solve the above-mentioned technical problems.

[0009] To achieve the above objectives, this utility model proposes a motor stator, comprising an annular stator core ring and a core tooth assembly mounted on the stator core ring. A winding coil is sleeved on the core tooth assembly. The core tooth assembly includes a core tooth body and core tooth end blocks mounted at both ends of the core tooth body. Positioning holes are respectively provided at both ends of the core tooth body. A positioning post is integrally formed on the plane where the core tooth end block mates with the core tooth body. The positioning post is inserted into the positioning hole of the core tooth body.

[0010] Preferably, the core tooth end block is made of SMC soft magnetic composite material.

[0011] Preferably, the core tooth body is formed by stacking several silicon steel sheets; through holes are formed on the silicon steel sheets at both ends of the core tooth body to form the positioning holes; no through holes are formed on the silicon steel sheets in the middle part of the core tooth body.

[0012] Preferably, the thickness of the silicon steel sheet is 0.15mm to 0.5mm.

[0013] Preferably, the contact surface between the iron core tooth end block and the bend in the copper wire on the winding coil is an arc surface.

[0014] Preferably, the iron core tooth assembly further includes an insulating sleeve; the insulating sleeve is sleeved on the assembly formed by the iron core tooth body and the iron core tooth end block; multiple parallel grooves are formed on the iron core tooth end block; multiple strip-shaped blocks are integrally formed on the inner wall surface of the upper and lower ends of the insulating sleeve; and the strip-shaped blocks are stuck in the grooves.

[0015] Preferably, the insulating sleeve is integrally formed with a baffle for blocking and limiting the winding coil.

[0016] Preferably, a plurality of T-slots are evenly distributed in a ring on the stator core ring; and a T-shaped tenon is provided on the core tooth assembly for engaging with the T-slots.

[0017] Preferably, two positioning posts are integrally formed on each iron core tooth end block, and two positioning holes are started at each end of the iron core tooth body, with the two positioning posts respectively inserted into the two positioning holes.

[0018] On the other hand, this utility model also proposes an electric motor, including the aforementioned motor stator.

[0019] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0020] (1) In this utility model, positioning holes are provided at both ends of the iron core tooth body; a positioning post is integrally formed on the plane that mates with the iron core tooth end block and the iron core tooth body; by inserting the positioning post into the positioning hole of the iron core tooth body, the problem of the iron core tooth end block slipping off when assembling the winding coil can be avoided.

[0021] (2) In this utility model, the contact surface between the iron core tooth end block and the copper wire bend on the winding coil is an arc surface, which allows the iron core tooth end block to fit better on the winding coil.

[0022] (3) Multiple parallel grooves are opened on the iron core tooth end block to engage with the strip blocks on the inner wall of the upper and lower ends of the insulating sleeve to form a limiting structure, which can effectively prevent the insulating sleeve from falling off. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 is a schematic diagram of the overall structure of the motor stator provided by this utility model;

[0025] Figure 2 is a structural schematic diagram of the iron core tooth assembly in this utility model;

[0026] Figure 3 is a cross-sectional view of the iron core tooth assembly in this utility model;

[0027] Figure 4 is a schematic diagram of the structure of the iron core tooth end block in this utility model;

[0028] Figure 5 is a schematic diagram of the structure of the iron core tooth end block in this utility model;

[0029] Figure 6 is a schematic diagram of the silicon steel sheet with through-hole structure in this utility model;

[0030] Figure 7 is a schematic diagram of a silicon steel sheet without a through-hole structure in this utility model;

[0031] Figure 8 is a schematic diagram of the insulating sleeve in this utility model.

[0032] Explanation of reference numerals in the attached diagram: 1. Core tooth body; 1a. Positioning hole; 2. Core tooth end block; 2a. Positioning post; 2b. Arc surface; 2c. Groove; 3. Stator core ring; 4. Winding coil; 5. Silicon steel sheet; 5a. Through hole; 6. Insulating sleeve; 6a. Strip block; 6b. Baffle. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Referring to Figures 1 to 8, this embodiment provides a motor stator, including an annular stator core ring 3 and a core tooth assembly mounted on the stator core ring 3. A winding coil 4 is sleeved on the core tooth assembly. The core tooth assembly includes a core tooth body 1 and core tooth end blocks 2. The core tooth end blocks 2 are respectively installed at both ends of the core tooth body 1. Positioning holes 1a are respectively opened at both ends of the core tooth body 1. A positioning post 2a is integrally formed on the plane of the core tooth end block 2 that mates with the core tooth body 1. The positioning post 2a is inserted into the positioning hole 1a of the core tooth body 1. By using the positioning post 2a inserted into the positioning hole 1a of the core tooth body 1, the problem of the core tooth end block 2 slipping off during the assembly of the winding coil 4 can be avoided.

[0036] In this embodiment, the core tooth end block 2 is made of SMC soft magnetic composite material.

[0037] As shown in Figures 6 and 7, the core tooth body 1 is formed by stacking several silicon steel sheets 5; through holes 5a are formed on the silicon steel sheets 5 at both ends of the core tooth body 1 to form the positioning holes 1a; the through holes 5a are not formed on the silicon steel sheets 5 in the middle part of the core tooth body 1.

[0038] Furthermore, the thickness of the silicon steel sheet 5 is 0.15mm to 0.5mm.

[0039] As shown in Figure 4, the contact surface between the iron core tooth end block 2 and the copper wire bend on the winding coil 4 is an arc surface 2b.

[0040] Referring to Figures 2 and 8, the core tooth assembly further includes an insulating sleeve 6; the insulating sleeve 6 is fitted onto the assembly formed by the core tooth body 1 and the core tooth end block 2; multiple parallel grooves 2c are formed on the core tooth end block 2; multiple strip-shaped blocks 6a are integrally formed on the inner wall surface of the upper and lower ends of the insulating sleeve 6; and the strip-shaped blocks 6a are locked in the grooves 2c to prevent the insulating sleeve 6 from slipping off. Furthermore, a baffle 6b is integrally formed on the insulating sleeve 6 to block and limit the winding coil 4.

[0041] As shown in Figures 1 and 2, multiple T-slots 3a are evenly distributed in a ring on the stator core ring 3; T-shaped tenons are provided on the core tooth assembly for engaging with the T-slots 3a. In Figure 2, A represents the T-shaped tenon.

[0042] In this embodiment, each core tooth end block 2 has two integrally formed positioning posts 2a, and each end of the core tooth body 1 has two positioning holes 1a, with the two positioning posts 2a inserted into the two positioning holes 1a respectively. This serves to prevent rotation. If only one positioning post 2a is provided, the core tooth end block 2 is prone to rotation around the axis of this positioning post 2a. Of course, two or more positioning posts 2a can also be provided.

[0043] On the other hand, this embodiment also provides a motor, including the motor stator described above.

[0044] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A motor stator, comprising an annular stator core ring (3) and a core tooth assembly mounted on the stator core ring (3), wherein a winding coil (4) is sleeved on the core tooth assembly, characterized in that: The core tooth assembly includes a core tooth body (1) and core tooth end blocks (2) installed at both ends of the core tooth body (1); positioning holes (1a) are respectively provided at both ends of the core tooth body (1); a positioning post (2a) is integrally formed on the plane of the core tooth end block (2) that mates with the core tooth body (1); the positioning post (2a) is inserted into the positioning hole (1a) of the core tooth body (1).

2. The motor stator as described in claim 1, characterized in that, The core tooth end block (2) is made of SMC soft magnetic composite material.

3. A motor stator as described in claim 1, characterized in that, The core tooth body (1) is formed by stacking several silicon steel sheets (5); through holes (5a) are provided on the silicon steel sheets (5) at both ends of the core tooth body (1) to form the positioning holes (1a); the silicon steel sheets (5) in the middle part of the core tooth body (1) do not have the through holes (5a).

4. A motor stator as described in claim 3, characterized in that, The thickness of the silicon steel sheet (5) is 0.15mm to 0.5mm.

5. A motor stator as described in claim 1, characterized in that, The contact surface between the iron core tooth end block (2) and the copper wire bend on the winding coil (4) is an arc surface (2b).

6. A motor stator as described in claim 1, characterized in that, The iron core tooth assembly also includes an insulating sleeve (6); the insulating sleeve (6) is sleeved on the assembly formed by the iron core tooth body (1) and the iron core tooth end block (2); multiple parallel grooves (2c) are opened on the iron core tooth end block (2); multiple strip blocks (6a) are integrally formed on the inner wall surface of the upper and lower ends of the insulating sleeve (6); and the strip blocks (6a) are stuck in the grooves (2c).

7. A motor stator as described in claim 6, characterized in that, A baffle (6b) is integrally formed on the insulating sleeve (6) to block and limit the winding coil (4).

8. A motor stator as described in claim 1, characterized in that, Multiple T-slots (3a) are evenly distributed in a ring on the stator core ring (3); T-shaped tenons are provided on the core tooth assembly for engaging with the T-slots (3a).

9. A motor stator as described in claim 1, characterized in that, Two positioning pins (2a) are integrally formed on each iron core tooth end block (2). There are two positioning holes (1a) at each end of the iron core tooth body (1), and the two positioning pins (2a) are respectively inserted into the two positioning holes (1a).

10. An electric motor, characterized in that, Includes the motor stator as described in any one of claims 1 to 9.

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