Stator insulation paper mouth portion expansion mechanism and expansion method

Abstract

The application discloses a stator insulating paper mouth expansion mechanism, which comprises a driving assembly and further comprises a first expansion component, a second expansion component and a connecting assembly. The first expansion component comprises a first connecting part and a first expansion part for first expanding and positioning the insulating paper mouth. The first expansion part is arranged at one end of the first connecting part. The second expansion component is connected with the driving assembly and comprises a second connecting part and a second expansion part for second expanding the insulating paper in the positioning state after passing through the first expansion component. The second expansion part is arranged at one end of the second connecting part. One end of the connecting assembly is connected with the first expansion component, and the other end of the connecting assembly is slidably connected with the driving assembly. The stator insulating paper mouth can be expanded to a better state.

Description

Technical Field

[0001] The present invention relates to the technical field of motor stators, and in particular to a stator insulation paper opening expansion mechanism and expansion method. Background Art

[0002] At present, the expansion of the stator insulation paper A of high-efficiency generators or new energy drive motors is widely used. Figure 3 The expansion component shown in the figure applies pressure to the insulating paper A through the helical teeth on the shaping block, expanding the opening of the insulating paper A in each core slot (the insulating paper A changes from Figure 1 The status shown is Figure 2 However, there are problems in this link:

[0003] 1. When using Figure 4 When the helical teeth have the first angle a (sharp) as shown, the guiding is easy and the insulating paper will not be caused to retreat. However, the insulating paper is subjected to less force and the deformation is insufficient, resulting in a large rebound.

[0004] 2. When using Figure 5 and Figure 6 When the bevel teeth of the second angle b (flat and blunt) in another expansion component are shaped, the opening of the insulating paper A is expanded well, but the insulating paper A may retreat and cannot be shaped and expanded.

[0005] 3. Due to the differences among different insulating papers, the ideal state cannot be achieved even by gradually adjusting the angle, and automated mass production cannot be achieved. Summary of the Invention

[0006] The present invention provides a stator insulation paper opening expansion mechanism and expansion method, and the present invention can expand the insulation paper opening to a better state.

[0007] The technical solutions to the above problems are as follows:

[0008] The stator insulation paper opening expansion mechanism includes a drive assembly and further includes:

[0009] A first expansion component, the first expansion component includes a first connecting portion and a first expansion portion for initially expanding and positioning the opening of the insulating paper, the first expansion portion being arranged at one end of the first connecting portion;

[0010] A second expansion component, the second expansion component is connected to the driving assembly, the second expansion component includes a second connecting portion and a second expansion portion that extends the insulating paper in the positioning state after passing through the first expansion component, and the second expansion portion is provided at one end of the second connecting portion;

[0011] A connecting assembly, one end of which is connected to the first expansion component, and the other end of which is slidably matched with the driving assembly.

[0012] A method for expanding the opening of stator insulation paper comprises the following steps:

[0013] S1, the driving assembly drives the first expansion component and the second expansion component to move together toward the insulating paper, so that the first expansion component expands the insulating paper and presses the insulating paper upward on the axial end of the stator core;

[0014] S2, the driving assembly applies an axial force to the second expansion component, causing the second expansion component to move relative to the first expansion component, so that the second expansion portion passes through the first expansion component to expand the insulating paper in the positioned state again.

[0015] With the expansion mechanism of the present invention, the first expansion component first expands the insulating paper, pressing it upward against the axial end of the stator core. When the second expansion component expands the insulating paper again, the paper is held in place by the first expansion component, preventing axial movement. Thus, the first expansion component of the present invention not only expands the insulating paper but also prevents it from moving after the initial expansion. Since the insulating paper cannot move axially during the second expansion, it cannot rebound. During the second expansion, sufficient expansion force is achieved, allowing the paper opening to expand to an optimal state.

[0016] This invention is particularly suitable for expanding the opening of stator insulation paper in high-efficiency generators or new energy drive motors. Compared to existing technologies, the present invention's method of expanding the opening of the insulation paper twice achieves the desired shape. The expansion mechanism achieves this through rational integration, achieving both expansions and achieving a simple structure with excellent expansion performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the opening of the insulation paper on the stator before it is expanded;

[0018] Figure 2 This is a schematic diagram of the opening of the insulating paper on the stator after being expanded;

[0019] Figure 3 A schematic diagram of a first expansion component in the prior art;

[0020] Figure 4 for Figure 3 Magnified view of part C;

[0021] Figure 5 is a schematic diagram of a second expansion component in the prior art;

[0022] Figure 6 for Figure 5 An enlarged view of the D portion;

[0023] Figure 7Schematic diagram of the stator insulation paper opening expansion mechanism of the present invention;

[0024] Figure 8 A three-dimensional diagram of the first expansion member and the second expansion member in cooperation;

[0025] Figure 9 for Figure 7 A magnified view of part I in FIG;

[0026] Symbols in the accompanying drawings:

[0027] Insulating paper A, stator core B, first expansion component 1, first connecting part 1a, first expansion part 1b, second expansion component 2, second connecting part 2a, second expansion part 2b, driver 3, guide part 4, first mounting part 5, second mounting part 6, mounting plate 7, guide shaft 8, limiting component 9, elastic component 10. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 、 2 7 to 9, the stator insulation paper opening expansion mechanism of the present invention includes a drive assembly, a first expansion component 1, a second expansion component 2, and a connecting assembly. The following describes each component and the relationship between them:

[0030] The first expansion component 1 includes a first connection portion 1a and a first expansion portion 1b for initially expanding and positioning the opening of the insulating paper A. The first expansion portion 1b is disposed at one end of the first connection portion 1a. The positioning of the insulating paper A is as follows: after the first expansion portion 1b expands the insulating paper A, the insulating paper A is pressed upwardly against the axial end of the stator core B. Thus, when the insulating paper A is expanded again by the second expansion component 2, the insulating paper A is pressed and positioned by the first expansion component 1, so that the insulating paper A cannot move axially or rebound. Therefore, the first expansion component 1 in the present invention not only has the function of expanding the insulating paper, but also has the function of preventing the insulating paper A from moving or rebounding after the first expansion.

[0031] The shape of the first connecting portion 1a is determined by the shape of the stator core. For example, if the stator core is cylindrical, the first connecting portion 1a can be cylindrical or cylindrical. If the stator core is square, the first connecting portion 1a is square. In this embodiment, the first connecting portion 1a is preferably cylindrical. The first expansion portion 1b is composed of a plurality of tooth-like first pressed teeth, which are arranged continuously along the same circumference on the axial end surface of the first connecting portion 1a. The cross-section of the first pressed teeth is preferably triangular.

[0032] The second expansion component 2 is connected to the driving assembly. The second expansion component 2 includes a second connecting portion 2a and a second expansion portion 2b that expands the insulating paper A in the positioned state again after passing through the first expansion component 1. The second expansion portion 2b is arranged at one end of the second connecting portion 2a.

[0033] The shape of the second connecting portion 2a is determined by the shape of the stator core. For example, if the stator core is cylindrical, the second connecting portion 2a can be cylindrical or cylindrical. If the stator core is square, the second connecting portion 2a is square. In this embodiment, the second connecting portion 2a is preferably cylindrical. The second expansion portion 2b is composed of a plurality of tooth-like second pressed teeth, which are arranged continuously along the same circumference on the axial end face of the second connecting portion 2a. The cross-section of the second pressed teeth is preferably trapezoidal.

[0034] As for the positional relationship between the first expansion component 1 and the second expansion component 2, in this embodiment, the first expansion component 1 surrounds the second expansion component 2. Before the second expansion component 2 expands the insulating paper, the second expansion portion 2b is located inside the first expansion component 1. When the first expansion component 1 expands the insulating paper A for the first time, since the second expansion portion 2b is located inside the first expansion component 1, the second expansion portion 2b is prevented from expanding the insulating paper A during the first expansion. That is, it is ensured that during the first expansion, only the first expansion component 1 can expand the insulating paper A.

[0035] As a variation of the above-mentioned positional relationship between the first expansion component 1 and the second expansion component 2, the first expansion component 1 can be located as a whole on the outside of the second expansion component 2, and the first expansion component 1 can be located as a whole above the second expansion component 2. When the second expansion component 2 is needed to expand the insulating paper A, the second expansion component 2 will enter and pass through the first expansion component 1.

[0036] One end of the connecting assembly is connected to the first expansion member 1, and the other end of the connecting assembly is slidably engaged with the drive assembly. In this embodiment, the connecting assembly and the drive assembly assemble the first expansion member 1 and the second expansion member 2. When the insulating paper A needs to be expanded, the first expansion member 1 and the second expansion member 2 can be moved toward the insulating paper A simultaneously. During expansion, the first expansion member 1 and the second expansion member 2 can be moved together by the drive assembly. The advantage of this structure is that a single drive assembly can be used to move the first expansion member 1 and the second expansion member 2, making the overall expansion mechanism compact and simple.

[0037] The drive assembly includes a driver 3 and a mounting assembly. Driver 3 is a linear actuator, which can be a pneumatic cylinder, hydraulic cylinder, electric screw, etc. The mounting assembly is fixed to the second expansion member 2 and is provided with a guide portion 4 that slidably engages with the connecting assembly.

[0038] The mounting assembly includes a mounting seat, and the mounting seat includes a first mounting portion 5 and a second mounting portion 6. The first mounting portion 5 is connected to the driver 3, and the second mounting portion 6 extends radially along the first mounting portion 5 and is fixed to the first mounting portion 5. If the first mounting portion 5 is matched with the guide portion 4, the volume of the first mounting portion 5 will be larger than the volume of this embodiment. Therefore, after the second mounting portion 6 is provided in this embodiment, it is beneficial to reduce the volume of the first mounting portion 5. A through hole is provided on the second mounting portion 6, and the guide portion 4 preferably adopts a guide sleeve, which cooperates with the through hole on the second mounting portion 6.

[0039] The mounting assembly further includes a mounting plate 7, which is secured to the first mounting portion 5 and the second expansion member 2. The mounting plate 7 can be adapted to accommodate second expansion members 2 of varying sizes. For example, the mounting plate 7 can be provided with multiple groups of mounting holes, each group of mounting holes being located on a different circle.

[0040] The connecting assembly includes a guide shaft 8 and a limiting component 9. One end of the guide shaft 8 is fixed to the first connecting portion 1a, and the other end of the guide shaft 8 passes through the drive assembly and slides with the drive assembly. The limiting component 9 is fixed to the other end of the guide shaft 8 to limit the movement of one end of the drive assembly. The guide portion 4 slides with the guide shaft 8. This structure allows the guide portion 4 in the drive assembly to be located between the limiting component 9 and the first connecting portion 1a. That is, when the guide portion 4 slides along the guide shaft 8, it can only slide between the limiting component 9 and the first connecting portion 1a. In addition, the connecting assembly allows the drive assembly to be assembled integrally with the first expansion component 1 and the second expansion component 2.

[0041] In this embodiment, the limiting component 9 is threadedly connected to the guide shaft 8. This threaded connection relationship allows the position of the limiting component 9 to be adjusted as needed, thereby adjusting the positions of the guide portion 4, the first mounting portion 5, the second mounting portion 6, and the mounting plate 7 in turn. The ultimate goal is to adjust the initial position of the second expansion portion 2b. For example, before the second expansion portion 2 performs the expansion work, the second expansion portion 2b can be adjusted to be located outside or inside the first expansion portion 1. If the initial position of the second expansion portion 2b is located inside the first expansion portion 1, the distance between the lower end of the second expansion portion 2b and the lower end of the first expansion portion 1 can be adjusted by the limiting component.

[0042] This embodiment further includes an elastic component 10 that transmits the pressure generated by the downward movement of the drive assembly to the first expansion component 1. One end of the elastic component 10 engages with the first expansion component 1, and the other end engages with the drive assembly. In this embodiment, the elastic component 10 is preferably a spring. The elastic component 10 applies preload to the insulating paper A after the initial expansion.

[0043] After the first expansion component 1 expands the insulating paper A, the first expansion component 1 is limited by the axial end surface of the stator core B and cannot move axially. The driver 3 drives the second expansion component 2 to move toward the insulating paper through the mounting assembly. The power generated by the driver 3 is transmitted to the guide portion 4 and the second expansion component 2 respectively through the mounting assembly. The guide portion 4 and the second expansion component 2 generate relative movement relative to the first expansion component 1 (the first expansion component 1 is in a stationary state). The guide portion 4 compresses the elastic component 10. When compressed, the elastic component 10 transmits force to the first expansion component 1, thereby increasing the positioning force of the first expansion component 1 on the insulating paper A, further ensuring that the insulating paper A cannot move when expanded by the second expansion component 2.

[0044] A method for expanding the opening of stator insulation paper comprises the following steps:

[0045] S1: The driving assembly drives the first expansion component 1 and the second expansion component 2 to move together toward the insulating paper. At this time, there is no relative displacement between the first expansion component 1 and the second expansion component 2, so that the first expansion portion 1b expands the insulating paper A and presses the insulating paper A upward on the axial end of the stator core B;

[0046] S2, the driving assembly applies an axial force to the second expansion component 2, causing the second expansion component 2 to move relative to the first expansion component 1, so that the second expansion portion 2b passes through the first expansion component 1 and expands the insulating paper in the positioned state again.

[0047] During the re-expansion process, the power generated by the driver 3 is transmitted to the guide part 4 and the second expansion part 2 respectively through the mounting assembly. The guide part 4 compresses the elastic part 10. When under pressure, the elastic part 10 transmits the force to the first expansion part 1, thereby increasing the positioning force of the first expansion part 1 on the insulating paper A, further ensuring that the insulating paper A cannot move when expanded by the second expansion part 2.

[0048] Finally, it should be noted that the above embodiments are merely preferred embodiments of the present invention and are used to illustrate the technical solutions of the present invention, rather than limiting them, let alone limiting the scope of protection of the present invention. Although the invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of protection of the claims.

Claims

1. The stator insulation paper opening expansion mechanism includes a drive assembly, characterized in that: Also includes: A first expansion component (1), the first expansion component (1) comprising a first connecting portion (1a) and a first expansion portion (1b) for initially expanding and positioning the opening of the insulating paper (A), the first expansion portion (1b) being arranged at one end of the first connecting portion (1a); A second expansion component (2), the second expansion component (2) is connected to the drive assembly, the second expansion component (2) comprises a second connecting portion (2a) and a second expansion portion (2b) for re-expanding the insulating paper (A) in a positioned state after passing through the first expansion component (1), the second expansion portion (2b) being arranged at one end of the second connecting portion (2a); The first expansion component (1) surrounds the second expansion component (2); before the second expansion component (2) expands the insulating paper, the second expansion portion (2b) is located inside the first expansion component (1); A connecting assembly, one end of the connecting assembly being connected to the first expansion component (1), and the other end of the connecting assembly being in sliding engagement with the driving assembly; The mounting assembly includes a mounting base, which includes: A first mounting portion (5), the first mounting portion (5) being connected to the driver (3); A second mounting portion (6) extends radially along the first mounting portion (5) and is fixed to the first mounting portion (5); a through hole is provided on the second mounting portion (6); the guide portion (4) is a guide sleeve, and the guide sleeve cooperates with the through hole on the second mounting portion (6).

2. The stator insulation paper opening expansion mechanism according to claim 1, characterized in that: The drive components include: Driver (3); The driver (3) is fixed to the mounting assembly, and the mounting assembly is fixed to the second expansion component (2). The mounting assembly is provided with a guide portion (4), and the guide portion (4) is in sliding engagement with the connecting assembly.

3. The stator insulation paper opening expansion mechanism according to claim 1, characterized in that: The mounting assembly further comprises a mounting plate (7), the mounting plate (7) being fixed to the first mounting portion (5), and the mounting plate (7) being also fixed to the second expansion component (2).

4. The stator insulation paper opening expansion mechanism according to claim 1, characterized in that: Connectivity components include: A guide shaft (8), one end of the guide shaft (8) is fixed to the first connecting portion (1a), and the other end of the guide shaft (8) passes through the drive assembly and is slidably engaged with the drive assembly; A limiting component (9) is fixed to the other end of the guide shaft (8) to limit the moving position of one end of the driving component.

5. The stator insulation paper opening expansion mechanism according to claim 4, characterized in that: The limiting component (9) is threadedly connected to the guide shaft (8).

6. The stator insulation paper opening expansion mechanism according to any one of claims 1 to 5, characterized in that: It also includes an elastic component (10) that transmits the pressure of the driving component when it is pressed down to the first expansion component (1), one end of the elastic component (10) cooperates with the first expansion component (1), and the other end of the elastic component (10) cooperates with the driving component.

7. The stator insulation paper opening expansion mechanism according to claim 1, characterized in that: The first expansion portion (1b) is composed of a plurality of tooth-shaped first pressing teeth, and the cross section of the first pressing teeth is triangular; The second expansion portion (2b) is composed of a plurality of tooth-shaped second pressing teeth, and the cross-section of the second pressing teeth is trapezoidal.

8. An expansion method using the stator insulation paper opening expansion mechanism according to claim 1, characterized in that: The following steps are involved: S1, the driving assembly drives the first expansion component (1) and the second expansion component (2) to move together in the direction of the insulating paper, so that the first expansion part (1b) expands the insulating paper (A) and presses the insulating paper (A) upward on the axial end of the stator core (B); S2, the driving component applies an axial force to the second expansion component (2), causing the second expansion component (2) to move relative to the first expansion component (1), so that the second expansion portion (2b) passes through the first expansion component (1) and expands the insulating paper in the positioned state again.

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