Integrated stator sheet of double-eccentric single-phase permanent magnet stepping motor

Abstract

The utility model discloses an integrated stator sheet of a double-eccentric single-phase permanent magnet stepping motor, and relates to the technical field of motor equipment. Comprising integrated stator sheets, a plurality of integrated stator sheets are laminated according to the central axial direction to form a stator block, and a plurality of winding gaps which are uniformly distributed along the central axis position of the integrated stator sheets are formed in the edge of the solid part of each integrated stator sheet; and the integrated stator sheets are uniformly provided with assembly structures at relative positions in each winding gap, and the assembly structures are used for positioning insulation paper when a plurality of integrated stator sheets are laminated to form a stator block. According to the utility model, by adopting the design that the positioning recesses with different sizes are matched with the anti-slip lines, the axial movement of the insulation paper is inhibited through the friction structure while the rapid positioning is realized, and the position deviation of the insulation paper can be automatically corrected in the axial lamination process through the gradual clamping channel formed by the symmetrical wedge-shaped stress bulges, so that the insulation paper can be quickly positioned. And continuous pressing force is generated through elastic deformation.

Description

Technical Field

[0001] This utility model relates to the field of motor equipment technology, specifically to an integrated stator plate of a double-eccentric single-phase permanent magnet stepper motor. Background Technology

[0002] The integrated stator lamination of the double-eccentric single-phase permanent magnet stepper motor serves as a core component of the micro-precision drive device.

[0003] A search revealed that the Chinese utility model patent application with publication number "CN215733710U" discloses an "integrated motor stator lamination". By setting the lamination body into an octagonal structure, the heat dissipation area of ​​the lamination body can be effectively increased, thereby improving the heat dissipation efficiency and effect. Secondly, heat dissipation groove 1 and heat dissipation groove 2 are respectively opened on the four planes and four inclined surfaces of the lamination body, which can further improve the heat dissipation efficiency of the lamination body, thereby further enhancing the heat dissipation efficiency of the lamination body.

[0004] However, in actual use, the aforementioned disclosed device and similar existing devices are prone to misalignment during actual assembly due to the lack of a precise and stable structure for the installation and positioning of the insulating paper, which indirectly affects the performance stability of the motor. Utility Model Content

[0005] The purpose of this invention is to provide an integrated stator plate for a double-eccentric single-phase permanent magnet stepper motor, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The double-eccentric single-phase permanent magnet stepper motor integrated stator lamination includes: an integrated stator lamination, multiple integrated stator laminations stacked in the axial direction to form a stator block, and the edge of the solid part of the integrated stator lamination has several winding notches evenly distributed along the central axis of the integrated stator lamination.

[0008] The integrated stator laminations have uniformly spaced assembly structures at relative positions within each winding notch. These assembly structures are used to position the insulating paper when multiple integrated stator laminations are stacked into a stator block. The insulating paper forms a continuous insulating layer within the assembly structure.

[0009] Furthermore, the integral stator lamination body has several positioning holes evenly distributed along the central axis of the integral stator lamination. The positioning holes are not connected to the winding notch, and the positioning holes are closer to the edge of the integral stator lamination body than the winding notch.

[0010] Furthermore, the assembly structure includes:

[0011] The positioning recesses located on both sides of the winding notch inside the integrated stator lamination have different aperture sizes. The positioning recesses, which are symmetrically distributed along the axis of the integrated stator lamination, maintain an equal diameter design.

[0012] Furthermore, the inner wall of the positioning recess is provided with anti-slip texture to increase the stability of the insulating paper after installation and prevent the insulating paper from shifting during the operation of the stator block. The anti-slip texture is distributed in a ring and the spacing between the anti-slip textures is uniform and fine, which is used to increase the friction between the anti-slip texture and the insulating paper.

[0013] Furthermore, the assembly structure includes:

[0014] The force-bearing protrusions located on both sides of the winding notch inside the integrated stator laminations are symmetrically wedge-shaped. After adjacent integrated stator laminations are stacked, they form a progressive clamping channel, which is used to fix the edge of the insulating paper and apply uniform pre-tightening force.

[0015] Furthermore, the force-bearing protrusion surface is designed with chamfered corners to guide the insulating paper to be precisely embedded into the clamping channel when the integrated stator laminations are axially stacked, thus avoiding damage to the insulating paper.

[0016] Furthermore, the assembly structure includes:

[0017] The limiting hooks are located at the ends of the notches on both sides of the winding notch inside the integrated stator lamination. The limiting hooks located on the same side edge of the integrated stator lamination are radially distributed towards the central axis of the integrated stator lamination. The ends of each limiting hook are designed with a bevel. When multiple integrated stator laminations are axially stacked, adjacent limiting hooks form a stepped locking chamber. The edge of the insulating paper is formed into a reinforcing rib that matches the locking chamber through a hot pressing process, thus completing the limiting in three-dimensional space.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The integrated stator lamination of this double-eccentric single-phase permanent magnet stepper motor uses differentiated positioning recesses combined with anti-slip texture design to achieve rapid positioning while suppressing axial movement of the insulating paper through a friction structure.

[0020] Secondly, the progressive clamping channel formed by the symmetrical wedge-shaped force-bearing protrusions can automatically correct the positional deviation of the insulating paper during axial stacking and generate continuous clamping force through elastic deformation;

[0021] Furthermore, the radially distributed limiting hooks form a three-dimensional constraint, which, together with the reinforcing rib structure formed by hot pressing of the insulating paper, completely eliminates the risk of displacement of the insulation layer during radial reciprocating motion. Attached Figure Description

[0022] Figure 1 This is an isometric drawing of the first embodiment of the present invention;

[0023] Figure 2 This is an isometric drawing of the second embodiment of the present invention;

[0024] Figure 3 This is an isometric drawing of the third embodiment of this utility model.

[0025] In the diagram: 1. Integrated stator lamination; 2. Positioning hole; 3. Winding notch; 4. Positioning recess; 5. Force-bearing protrusion; 6. Limiting hook. Detailed Implementation

[0026] 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.

[0027] Before understanding the technical solution proposed in this application, it is important to understand that the specific meaning of the integrated stator lamination 1 in the prior art is a single-unit structure formed by stamping, stacking and insulating a whole silicon steel sheet.

[0028] like Figures 1-3 As shown, this solution includes: an integrated stator lamination 1.

[0029] Multiple integral stator laminations 1 are stacked axially to form a stator block. The edge of the integral stator lamination 1 has several winding notches 3 evenly distributed along the central axis of the integral stator lamination 1. The integral stator lamination 1 has an assembly structure evenly distributed in each winding notch 3. The assembly structure is used to position the insulating paper when multiple integral stator laminations 1 are stacked into a stator block. The insulating paper forms a continuous insulating layer in the assembly structure. In addition, several positioning holes 2 are evenly distributed along the central axis of the integral stator lamination 1 at the integral stator lamination 1. The positioning holes 2 are not connected to the winding notches 3, and the positioning holes 2 are closer to the edge of the integral stator lamination 1 than the winding notches 3.

[0030] It should be added that in this application Figures 1 to 3 The content is to better represent the features proposed in this application by breaking down the whole silicon steel sheet into sheet-like structures for easier display.

[0031] Implementation Plan 1, Reference Figure 1As can be seen, in this embodiment, the assembly structure includes: positioning recesses 4 located on both sides of the winding notch 3 inside the integrated stator lamination 1. The two positioning recesses 4 located on the same side edge adopt a differential aperture design (left aperture Φ2.5±0.02mm, right aperture Φ3.0±0.02mm). The positioning recesses 4, which are symmetrically distributed along the axis of the stator lamination 1, maintain an equal diameter design. It should be noted that this differential aperture design facilitates direction identification during assembly, and the equal diameter symmetrical structure can ensure balanced axial force. In addition, it should be added that the depth of the positioning recesses 4 is controlled within the range of 1.2-1.5mm, and its inner wall is treated with a 30° chamfer to effectively reduce stress concentration during the assembly of the insulating paper.

[0032] It is worth noting that, in this embodiment, the inner wall of the positioning recess 4 is provided with anti-slip texture with a spiral angle, the texture spacing is 0.2mm, the texture depth is 0.1mm, and it is formed by CNC milling. This texture structure can improve the static friction coefficient after the insulating paper is installed. In addition, the anti-slip texture is distributed in a ring, which increases the contact area of ​​the insulating paper.

[0033] Implementation Plan 2, Reference Figure 2 As can be seen, in this embodiment, the assembly structure includes: force-bearing protrusions 5 set on both sides of the winding notch 3 inside the integrated stator lamination 1. The force-bearing protrusions 5 located on the same side edge of the integrated stator lamination 1 have a symmetrical wedge-shaped structure. After adjacent integrated stator laminations 1 are stacked, a progressive clamping channel is formed to fix the edge of the insulating paper and apply a uniform pre-tightening force. It should be added that the surface of the force-bearing protrusions 5 is designed with chamfers to guide the insulating paper to be accurately embedded into the clamping channel when the integrated stator laminations 1 are axially stacked, so as to avoid damage to the insulating paper.

[0034] It should be noted that in this implementation scheme, by controlling the stacking gap of the integrated stator lamination 1, a pressure gradient is formed in the progressive clamping channel. The pressure gradient design ensures that the insulating paper is subjected to balanced force throughout its entire length. Compared with the anti-slip textured structure of the first implementation scheme, this scheme is more suitable for high vibration conditions.

[0035] Implementation Plan 3, Reference Figure 3 As can be seen, the assembly structure in this embodiment includes: limiting hooks 6 set at the ends of the notches on both sides of the winding notch 3 inside the integrated stator lamination 1. The limiting hooks 6 located on the same side edge of the integrated stator lamination 1 are radially distributed towards the central axis of the integrated stator lamination 1. The ends of each limiting hook 6 are designed with bevels. When multiple integrated stator laminations 1 are axially stacked, adjacent limiting hooks 6 form a stepped locking chamber. The edge of the insulating paper is formed with reinforcing ribs that match the locking chamber through a hot pressing process, thus completing the limiting in three-dimensional space.

[0036] It should be noted that this implementation scheme achieves multi-directional stress compensation through the radial distribution characteristics of the limiting hooks 6. During the lamination process, the limiting hooks 6 ensure that the reinforcing ribs of the insulating paper are fully embedded in the locking chamber after elastic deformation. This elastic deformation and precise embedding effectively enhance the connection stability between the insulating paper and the stator sheets. At the same time, the radial distribution allows stress to be evenly distributed, avoiding the risk of damage to the insulating paper caused by local stress concentration.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. Integrated stator laminations for a double-eccentric single-phase permanent magnet stepper motor, comprising: The integrated stator lamination (1) is characterized by: Multiple integral stator laminations (1) are stacked in the axial direction to form a stator block. The edge of the integral stator lamination (1) has several winding notches (3) evenly distributed along the central axis of the integral stator lamination (1). The integrated stator laminations (1) have uniformly arranged assembly structures at relative positions within each winding notch (3). The assembly structures are used to position the insulating paper when multiple integrated stator laminations (1) are stacked into a stator block. The insulating paper forms a continuous insulating layer within the assembly structure.

2. The integrated stator lamination of the double-eccentric single-phase permanent magnet stepper motor according to claim 1, characterized in that: The integral stator lamination (1) has several positioning holes (2) evenly distributed along the central axis of the integral stator lamination (1). The positioning holes (2) are not connected to the winding notch (3), and the positioning holes (2) are closer to the edge of the integral stator lamination (1) than the winding notch (3).

3. The integrated stator lamination of the double-eccentric single-phase permanent magnet stepper motor according to claim 1, characterized in that: The assembly structure includes: The positioning recesses (4) located on both sides of the winding notch (3) in the integrated stator lamination (1) have different aperture sizes. The positioning recesses (4) symmetrically distributed along the axis of the integrated stator lamination (1) maintain an equal diameter design.

4. The integrated stator lamination of the double-eccentric single-phase permanent magnet stepper motor according to claim 3, characterized in that: The inner wall of the positioning recess (4) is provided with anti-slip texture to increase the stability of the insulating paper after installation and prevent the insulating paper from shifting during the operation of the stator block. The anti-slip texture is distributed in a ring and the spacing between the anti-slip textures is uniform and fine, which is used to increase the friction between the anti-slip texture and the insulating paper.

5. The integrated stator lamination of the double-eccentric single-phase permanent magnet stepper motor according to claim 1, characterized in that: The assembly structure includes: The force-bearing protrusions (5) located on both sides of the winding notch (3) in the integrated stator lamination (1) are symmetrical wedge-shaped structures located on the same side edge of the integrated stator lamination (1). After the adjacent integrated stator laminations (1) are stacked, a progressive clamping channel is formed to fix the edge of the insulating paper and apply uniform pre-tightening force.

6. The integrated stator lamination of the double-eccentric single-phase permanent magnet stepper motor according to claim 5, characterized in that: The surface of the force-bearing protrusion (5) is designed with chamfers to guide the insulating paper to be accurately embedded into the clamping channel when the integrated stator lamination (1) is axially stacked, thus avoiding damage to the insulating paper.

7. The integrated stator lamination of the double-eccentric single-phase permanent magnet stepper motor according to claim 1, characterized in that: The assembly structure includes: The limiting hooks (6) are set at the ends of the notches on both sides of the winding notch (3) inside the integrated stator lamination (1). The limiting hooks (6) located on the same side edge of the integrated stator lamination (1) are radially distributed towards the central axis of the integrated stator lamination (1). The ends of each limiting hook (6) are designed with a bevel. When multiple integrated stator laminations (1) are axially stacked, adjacent limiting hooks (6) form a stepped locking chamber. The edge of the insulating paper is formed with a reinforcing rib that matches the locking chamber through a hot pressing process, thus completing the limiting in three-dimensional space.

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