Motor stator

Abstract

The utility model relates to a motor stator, and relates to the technical field of motors, the motor stator comprises a plurality of laminated punching sheets, at least two groups of rivets are riveted on the punching sheets along the circumferential direction, the rivet groups at least comprise at least eight rivet groups I and at least eight rivet groups II, and the number of the rivet groups I and the number of the rivet groups II are not less than eight; and the rivet group I and the rivet group II are respectively positioned at different radial positions on the punching sheet. The stator punching sheet is fixed through the at least two groups of rivets, and the stator punching sheet has the advantage of high strength, so that a buckle sheet is not needed, the cost is reduced, and the installation problem caused by the fact that the buckle sheet protrudes out of the end face of the stator is also avoided; the rivet group I and the rivet group II can be used for respectively riveting and fixing different radial positions of the punching sheet, and the riveting and fixing effects on the inner side and the outer side of the punching sheet are relatively strong; and through the cooperation of the first rivet group and the second rivet group, the overall fixing strength of the stator is improved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor stator. Background Art

[0002] The stator of the motor is a product formed by stacking and fixing stator punching sheets. The stator is fixed in the motor housing and cooperates with the rotor to make the rotor rotate through the principle of electromagnetic induction.

[0003] The utility model patent with announcement number CN203219009U discloses a generator stator, including a stator core formed by stacking stator punchings and enameled wire wound on the stator core. The stator punching is a circular punching with a circular hole in the center. The circular hole is provided with a plurality of tooth slots. The tooth slots are rectangular, and the inner end side walls of the tooth slots are symmetrically provided with convex teeth; the outer side of the stator punching is provided with an inwardly concave clip groove, and a welding groove is provided on the side of the clip groove. Ventilation holes are provided on the stator punching; after multiple stator punchings are stacked into the stator core, the ventilation holes form a through ventilation channel, and clips are provided in the clip grooves, and the clips are welded to the stator core through the welding grooves.

[0004] Regarding the above-mentioned related technologies, the inventor believes that the stator core needs to use clips in combination with clip slots to fix the stacked punching sheets. However, the use of clips not only requires the manufacture of clip slots on the edges of the punching sheets, but also requires the addition of clip machines, welding machines and other equipment, which is costly. In addition, the clips protrude from the end face of the stator, which will also have a certain impact on the installation of the stator and needs to be improved. Utility Model Content

[0005] The present application provides a motor stator, which fixes the stator punching sheets by at least two groups of rivets, has the advantage of high strength, does not require the use of clips, reduces costs, and avoids installation problems caused by the clips protruding from the stator end face.

[0006] This application provides a motor stator, which adopts the following technical solution:

[0007] A motor stator comprises a plurality of stacked punching sheets, wherein at least two groups of rivets are riveted circumferentially on the punching sheets, and the rivet groups comprise at least a first rivet group and a second rivet group, and the number of the first rivet group and the number of the second rivet group is no less than eight.

[0008] By adopting the above technical solution, the present application fixes the stator punching sheets by at least two groups of rivets, which has the advantage of high strength. Therefore, there is no need to use clips, which reduces costs and avoids installation problems caused by clips protruding from the stator end face.

[0009] Optionally, the rivet group one and the rivet group two are respectively located at different radial positions on the punching sheet.

[0010] By adopting the above technical solution, rivet groups one and two can respectively rivet and fix different radial positions of the punching sheet, with strong riveting and fixing effects on both the inner and outer sides of the punching sheet. The coordinated cooperation of rivet groups one and two improves the overall fixing strength of the stator.

[0011] Optionally, the portion of the rivet located on the top surface of the punch is in the shape of an elongated strip, wherein the length direction of the elongated strip of rivet group one is along the radial direction of the punch, and the length direction of the elongated strip of rivet group two is along the circumferential direction of the punch.

[0012] By adopting the above technical solution, the length directions of the long strips of rivet group one and rivet group two are different, one group has a stronger ability to withstand radial impact force, and the other group has a stronger ability to withstand circumferential impact force. Through the coordinated cooperation of rivet group one and rivet group two, the overall fixing strength of the stator is improved.

[0013] Optionally, a punching groove is provided at the end of the rivet located at the bottom punching sheet, and the punching groove causes the end of the rivet to be cracked and expand outward.

[0014] Optionally, the bottom end of the rivet is cracked and squeezes the punching sheet at the bottom, causing a concave surface of the punching sheet.

[0015] By adopting the above technical solution, the setting of the stamping groove causes the lower end of the rivet to squeeze the punching sheet and produce deformation, which prevents the punching sheet from falling off downward and improves stability.

[0016] Optionally, the bottom end of the rivet does not protrude from the bottom surface of the punching sheet.

[0017] By adopting the above technical solution, the bottom surface of the stator is made flat, which is convenient for installation.

[0018] Optionally, the punching sheet is provided with a plurality of winding grooves, and the number of the winding grooves is not less than twenty.

[0019] By adopting the above technical solution, the winding groove is used to install the enameled wire.

[0020] Optionally, the opening of the winding groove toward the inner ring opening of the punching sheet is in a constricted shape.

[0021] By adopting the above technical solution, the constricted winding groove can prevent the enameled wire from falling off.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The present application fixes the stator punching sheets with at least two sets of rivets, which has the advantage of high strength. Therefore, no clasps are required, which reduces costs and avoids installation problems caused by clasps protruding from the stator end face.

[0024] 2. Rivet group 1 and rivet group 2 can respectively perform riveting and fixing on different radial positions of the punching piece, and the riveting and fixing effect on the inner and outer sides of the punching piece is strong;

[0025] 3. The coordinated cooperation of rivet group 1 and rivet group 2 improves the overall fixing strength of the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional diagram of a motor stator according to the first embodiment;

[0027] Figure 2 is a longitudinal partial cross-sectional view of the rivet and the stamping groove of the first embodiment;

[0028] Figure 3 It is a top view of a motor stator of the second embodiment.

[0029] Explanation of the accompanying reference numerals: 1. Punch; 11. Winding groove; 2. Rivet; 21. Rivet group 1; 22. Rivet group 2; 3. Stamping groove. DETAILED DESCRIPTION

[0030] The present application is further described in detail below with reference to the accompanying drawings.

[0031] Example 1:

[0032] Reference Figure 1 This embodiment discloses a motor stator, comprising a plurality of stacked laminations 1, each of which is provided with a plurality of winding slots 11, with the number of winding slots 11 being no less than twenty. The openings of the winding slots 11 facing the inner ring opening of the lamination 1 are tapered, thereby preventing the enameled wire in the winding slots 11 from escaping.

[0033] At least two groups of rivets 2 are riveted circumferentially to the punching plate 1. The rivets 2 penetrate all of the punching plates 1. The rivet groups 2 include at least one rivet group 21 and a second rivet group 22. The number of rivet groups 21 and 22 is no less than eight. The rivets 2 in the first rivet group 21 are evenly distributed along the circumference of the punching plate 1. The rivets 2 in the second rivet group 22 are also evenly distributed along the circumference of the punching plate 1.

[0034] Rivet Group 1 21 and Rivet Group 2 22 are located at different radial positions on the punching plate 1. Specifically, Rivet Group 1 21 is located closer to the outside of the punching plate 1 to strengthen the riveting and fixing effect on the outside of the punching plate 1; Rivet Group 2 22 is located closer to the inside of the punching plate 1 to strengthen the riveting and fixing effect on the inside of the punching plate 1. The coordinated cooperation of Rivet Group 1 21 and Rivet Group 2 22 improves the overall fixing strength of the stator.

[0035] Reference Figure 2The end of the bottom punching plate 1, where the rivet 2 is located, is provided with a stamped groove 3. This groove 3 causes the end of the rivet 2 to crack and expand outward. The stamped groove 3 is formed by stamping. The bottom end of the rivet 2 cracks and squeezes the bottom punching plate 1, causing a concave surface on the surface of the punching plate 1. The provision of the stamped groove 3 causes the lower end of the rivet 2 to squeeze the punching plate 1 and deform, preventing the punching plate 1 from detaching downward and improving stability. The bottom end of the rivet 2 does not protrude from the bottom surface of the punching plate 1, making the bottom surface of the stator smooth and easy to install.

[0036] The implementation principle of a motor stator of this embodiment is as follows: the rivets 2 are installed using a punching riveting device of the prior art, and the installation of the rivet group 1 21 or the rivet group 2 22 can be automatically completed by the device.

[0037] The present application fixes the stator punching sheet 1 by at least two groups of rivets 2, which has the advantage of high strength. Therefore, there is no need to use clips, which reduces costs and avoids installation problems caused by clips protruding from the stator end face.

[0038] It should be noted that although the rivets 2 in this embodiment only have rivet group 1 21 and rivet group 2 22, in actual implementation, the number of rivet groups can be increased, such as rivet group 3 and rivet group 4, to improve the fixing effect, which still falls within the scope of protection of this application.

[0039] Example 2:

[0040] Reference Figure 3 , a motor stator, the difference between embodiment 2 and embodiment 1 is that the part of the rivet 2 located on the top surface of the punching sheet 1 is long and strip-shaped, wherein the length direction of the long strip of rivet group 1 21 is along the radial direction of the punching sheet 1, and the length direction of the long strip of rivet group 2 22 is along the circumferential direction of the punching sheet 1.

[0041] The implementation principle of Example 2 is as follows: by having the long strips of rivet group 1 21 and rivet group 2 22 in different length directions, one group has a stronger ability to withstand radial impact force, while the other group has a stronger ability to withstand circumferential impact force. By the coordinated cooperation of rivet group 1 21 and rivet group 2 22, the overall fixing strength of the stator is improved.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A motor stator, comprising a plurality of stacked sheets (1), characterized in that: At least two groups of rivets (2) are riveted circumferentially on the punching sheet (1), the rivet (2) groups at least comprising a rivet group one (21) and a rivet group two (22), and the number of the rivet group one (21) and the rivet group two (22) is no less than eight; The end of the rivet (2) located on the bottom punching sheet (1) is provided with a punching groove (3), and the punching groove (3) causes the end of the rivet (2) to be cracked and expand outward; The bottom end of the rivet (2) is cracked and squeezes the punching sheet (1) at the bottom, causing the surface of the punching sheet (1) to be concave.

2. The motor stator according to claim 1, characterized in that: The rivet group one (21) and the rivet group two (22) are respectively located at different radial positions on the punching sheet (1).

3. The motor stator according to claim 1, characterized in that: The portion of the rivet (2) located on the top surface of the punch (1) is in the shape of an elongated strip, wherein the length direction of the elongated strip of the rivet group one (21) is along the radial direction of the punch (1), and the length direction of the elongated strip of the rivet group two (22) is along the circumferential direction of the punch (1).

4. The motor stator according to claim 1, characterized in that: The bottom end of the rivet (2) does not protrude from the bottom surface of the punching sheet (1).

5. The motor stator according to claim 1, characterized in that: The punching sheet (1) is provided with a plurality of winding grooves (11), and the number of the winding grooves (11) is not less than twenty.

6. The motor stator according to claim 5, characterized in that: The opening of the winding groove (11) facing the inner ring opening of the punching sheet (1) is in a constricted shape.

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