Stator and rotor assembly of motor

Abstract

The utility model discloses a stator and rotor assembly of a motor. The stator and rotor assembly comprises a stator assembly and a rotor. The stator assembly comprises a large stator and a small stator, the large stator is provided with a central through hole, arched grooves are formed in the two opposite sides of an inner cavity of the large stator, arc-shaped grooves are formed in the two sides, in the circumferential direction of the central through hole, of the arched grooves, inclined planes are arranged on the sides, close to the arc-shaped grooves, of the arched grooves, and the small stator comprises a circular body part. An assembling round hole is formed in the middle of the round body part, side wing parts are arranged on the two opposite sides of the peripheral side wall of the round body part in an outward protruding and extending mode, the small stator is located in the center through hole, the sides, away from the round body part, of the side wing parts are located in the arch-shaped grooves, the rotor is assembled in the assembling round hole, and a shaft hole is formed in the center in the rotor. Seventeen rotor grooves are formed in the periphery of the shaft hole in the rotor; therefore, the problems of difficult press-in, crushing damage, deformation and the like caused by the large influence of a right-angle contact surface when the small stator is pressed in in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the field of motor components, in particular to a stator and rotor assembly of a motor. Background Art

[0002] The motor is mainly composed of a stator and a rotor. The stator is generally composed of multiple stator punchings stacked together, and the rotor is generally composed of multiple rotor punchings stacked together. The punchings are mostly silicon steel sheets. For the stator punching, a rotor hole is opened in the center, and for the rotor punching, a shaft hole is opened in the center, and the shaft hole is surrounded by rotor slots. Some stators usually include a large stator and a small stator. An assembly hole is set on the large stator, and a rotor hole is set on the small stator. The small stator is installed in the assembly hole of the large stator, and the rotor is installed in the rotor hole of the small stator. The assembly hole of the large stator is provided with an arched groove for positioning and adapting the small stator, such as China Publication No. CN 208112342 U discloses a large stator punching sheet and a large stator group for a series-excited motor, wherein the large stator punching sheet includes a central through hole and stator winding holes arranged on both sides of the large stator punching sheet. The inner cavity of the large stator punching sheet is provided with a pair of arched grooves connected to the central through hole and are horizontally perpendicular to the position of the stator winding hole. The arched grooves are connected to semi-arc grooves connected to the central through hole on both sides, wherein an arc-shaped protrusion is further provided at the position of the central through hole relative to the stator winding hole, and a strip block is further provided on the outer side surface of the large stator punching sheet relative to the arched groove. Although the arched groove can meet the positioning adaptation of the small stator, since the connection between the two sides of the arched groove and the semi-arc groove is at right angles, when the small stator is pressed in, it will be greatly affected by the right-angled contact surface, resulting in difficulties in pressing in, crushing, deformation, etc.

[0003] Therefore, it is necessary to develop a new technology to solve the above problems. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies in the prior art, and its main purpose is to provide a stator and rotor assembly for a motor, which solves the existing problems of difficulty in pressing in, crushing, deformation, etc. when a small stator is pressed in, which is greatly affected by the right-angle contact surface.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A stator and rotor assembly of a motor, comprising a stator assembly and a rotor assembled within the stator assembly; the stator assembly comprising a large stator and a small stator, the large stator having a central through hole, arched slots being provided on opposite sides of an inner cavity of the large stator, the arched slots being connected to the central through hole, arcuate slots being provided on both sides of the arched slot along the circumferential direction of the central through hole, the arcuate slots being connected to the central through hole, an inclined surface being provided on a side of the arched slot adjacent to the arcuate slot, the inclined surface extending obliquely inwardly from an inner sidewall of the arched slot toward the arcuate slot;

[0007] The small stator includes a circular body portion, a mounting circular hole is provided in the middle of the circular body portion, and side wings are provided on both opposite sides of the outer peripheral side wall of the circular body portion to protrude outward. The small stator is located in the central through hole, and the side of the side wing away from the circular body portion is positioned in the arched groove. The rotor is assembled in the mounting circular hole, and an axial hole is opened at the center of the rotor. Seventeen rotor slots are opened in the rotor outside the axial hole, and the seventeen rotor slots are arranged in sequence with uniform spacing along the circumferential direction of the axial hole.

[0008] As a preferred solution, a first slot is provided on the side of the wing portion close to the assembly circular hole, the first slot extends along the lateral extension direction of the wing portion, the first slot is connected to the assembly circular hole, and a second slot is provided at the connection between the outer peripheral side wall of the circular body portion and the wing portion, the second slot is provided on the side of the outer side wall of the wing portion close to the first slot, the second slot extends along the lateral extension direction of the wing portion, the first slot and the second slot are parallel to each other, and starting copper is connected to the first slot and the second slot.

[0009] As a preferred solution, stator winding holes are provided on two pairs of side edges of the large stator, and the positions of the stator winding holes and the arched slots are horizontally perpendicular.

[0010] As a preferred solution, an arc-shaped protrusion is provided on the inner side wall of the central through hole relative to the stator surrounding hole.

[0011] As a preferred solution, a strip block is provided on the outer side wall of the large stator relative to the arched groove.

[0012] As a preferred solution, the large stator includes a plurality of large stator punchings stacked up and down, and two adjacent large stator punchings are connected together by riveting.

[0013] As a preferred solution, the small stator includes a plurality of small stator punchings stacked up and down, and two adjacent small stator punchings are connected together by riveting.

[0014] As a preferred solution, the angle between the inclined surface and the horizontal center line of the arched groove is 30 degrees.

[0015] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that it is mainly achieved by arranging an inclined surface on the side of the arched groove of the large stator close to the arc groove, and making the inclined surface extend obliquely inward from the inner side wall of the arched groove toward the arc groove. In this way, when the side wing part of the small stator is pressed into the arched groove, the contact area between the side surface of the side wing part and the inner side wall of the arched groove is reduced, thereby solving the existing problems that when the small stator is pressed in, it is greatly affected by the right-angle contact surface and causes problems such as difficulty in pressing in, crushing, and deformation. In addition, by setting the rotor slots on the rotor to seventeen, the temperature rise of the motor during use can be reduced to meet the standard.

[0016] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a top view of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 This is a top view of a large stator according to an embodiment of the present utility model;

[0019] Figure 3 It is a side view schematic diagram of a large stator of an embodiment of the present utility model;

[0020] Figure 4 This is a top view of a small stator according to an embodiment of the present utility model;

[0021] Figure 5 It is a side view schematic diagram of a small stator of an embodiment of the present utility model;

[0022] Figure 6 is a top view of a rotor according to an embodiment of the present invention;

[0023] Figure 7 It is a partial structural diagram of a large stator in an embodiment of the present utility model.

[0024] Description of the accompanying drawings:

[0025] 10. Large stator 11. Center through hole

[0026] 12. Arched groove 13. Arc groove

[0027] 14. Inclined surface 15. Stator winding hole

[0028] 16. Arc-shaped protrusion 17. Strip block

[0029] 20. Small stator 21. Circular body

[0030] 22. Assembly round hole 23. Side wing

[0031] 24. First slot 25. Second slot

[0032] 26, starting copper 30, rotor

[0033] 31. Shaft hole 32. Rotor slot

[0034] 101. Large stator punching sheet 201. Small stator punching sheet DETAILED DESCRIPTION

[0035] Please refer to Figures 1 to 7 As shown, it shows the specific structure of an embodiment of the present utility model, which is specifically a stator and rotor assembly of an AC motor.

[0036] A stator and rotor assembly of a motor includes a stator assembly and a rotor 30 assembled in the stator assembly; the stator assembly includes a large stator 10 and a small stator 20, the large stator 10 includes a plurality of large stator punchings 101 stacked up and down, and adjacent large stator punchings 101 are connected together by riveting; the small stator 20 includes a plurality of small stator punchings 201 stacked up and down, and adjacent small stator punchings 201 are connected together by riveting.

[0037] The large stator 10 has a central through hole 11, and arched grooves 12 are provided on both opposite sides of the inner cavity of the large stator 10. The arched grooves 12 are connected to the central through hole 11. The arched grooves 12 are provided with arcuate grooves 13 on both sides along the circumferential direction of the central through hole 11, and the arcuate grooves 13 are connected to the central through hole 11. Stator winding holes 15 are provided on two pairs of side edges of the large stator 10. The positions of the stator winding holes 15 and the arched grooves 12 are horizontally perpendicular. The inner side wall of the central through hole 11 is provided with an arcuate protrusion 16 relative to the stator winding hole 15, and the outer side wall of the large stator 10 is provided with a bar block relative to the arched groove 12. 17. An inclined surface 14 is provided on one side of the arched groove 12 close to the arcuate groove 13, and the inclined surface 14 extends obliquely inward from the inner side wall of the arched groove 12 toward the arcuate groove 13; the angle between the inclined surface 14 and the center line of the arched groove 12 in the horizontal direction is 30 degrees. In this way, by setting the inclined surface 14, when the side wing portion 23 of the small stator 20 is pressed into the arched groove 12, the contact area between the side surface of the side wing portion 23 and the inner side wall of the arched groove 12 is reduced, thereby solving the existing problems that when the small stator 20 is pressed into, it is greatly affected by the right-angle contact surface, resulting in difficulty in pressing, crushing, deformation, etc.

[0038] The small stator 20 includes a circular body portion 21, a mounting circular hole 22 is provided in the middle of the circular body portion 21, and two pairs of outer peripheral side walls of the circular body portion 21 are provided with side wings 23 extending outward. The small stator 20 is located in the central through hole 11, and the side of the side wing 23 away from the circular body portion 21 is positioned in the arched groove 12. The rotor 30 is assembled in the mounting circular hole 22, and the side of the side wing 23 close to the mounting circular hole 22 is provided with a first slot 24, which extends along the lateral extension direction of the side wing 23. The first slot 24 is connected to the assembly circular hole 22. A second slot 25 is provided at the connection between the outer peripheral side wall of the circular body 21 and the side wing 23. The second slot 25 is provided on the side of the outer side wall of the side wing 23 near the first slot 24. The second slot 25 extends along the lateral extension direction of the side wing 23. The first slot 24 and the second slot 25 are parallel to each other. A starting copper 26 is connected to the first slot 24 and the second slot 25. The starting copper 26 can be used to increase the starting efficiency of the motor. In addition, the starting copper 26 can be installed by welding. The starting copper 26 is first inserted into the first slot 24 and the second slot 25, fixed in the specific position, and then further fixed by welding.

[0039] The rotor 30 has an axial hole 31 at its center. Seventeen rotor slots 32 are defined within the rotor 30, circumferentially surrounding the axial hole 31. These seventeen rotor slots 32 are evenly spaced along the circumference of the axial hole 31. Conventional rotors 30 typically have twenty-two rotor slots 32. This excessive number of twenty-two rotor slots 32 can result in excessively high temperature rise during motor operation, failing to meet operating standards. However, by providing seventeen rotor slots 32, the motor's operating temperature rise can be reduced, meeting operating standards.

[0040] To sum up, the design focus of the present invention is that it mainly provides an inclined surface on the side of the arched groove of the large stator close to the arc groove, and makes the inclined surface extend obliquely inward from the inner side wall of the arched groove toward the arc groove. In this way, when the side wing part of the small stator is pressed into the arched groove, the contact area between the side surface of the side wing part and the inner side wall of the arched groove is reduced, thereby solving the existing problems that when the small stator is pressed in, it will be greatly affected by the right-angle contact surface and cause difficulties in pressing in, crushing, deformation, etc., and by setting the rotor slots on the rotor to seventeen, the temperature rise of the motor during use can be reduced to meet the standard.

[0041] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A stator and rotor assembly of a motor, comprising a stator assembly and a rotor assembled in the stator assembly; characterized in that: The stator assembly includes a large stator and a small stator, the large stator having a central through hole, arched grooves are provided on opposite sides of the inner cavity of the large stator, the arched grooves are connected to the central through hole, the arched grooves are provided on both sides along the circumferential direction of the central through hole, the arcuate grooves are connected to the central through hole, and an inclined surface is provided on a side of the arched groove close to the arcuate groove, the inclined surface extending obliquely inward from the inner side wall of the arched groove toward the arcuate groove; The small stator includes a circular body portion, a mounting circular hole is provided in the middle of the circular body portion, and side wings are provided on both opposite sides of the outer peripheral side wall of the circular body portion to protrude outward. The small stator is located in the central through hole, and the side of the side wing away from the circular body portion is positioned in the arched groove. The rotor is assembled in the mounting circular hole, and an axial hole is opened at the center of the rotor. Seventeen rotor slots are opened in the rotor outside the axial hole, and the seventeen rotor slots are arranged in sequence with uniform spacing along the circumferential direction of the axial hole.

2. The stator and rotor assembly of a motor according to claim 1, characterized in that: A first slot is provided on the side of the wing portion close to the assembly circular hole, the first slot extends along the lateral extension direction of the wing portion, the first slot is connected to the assembly circular hole, a second slot is provided at the connection between the outer peripheral side wall of the circular body portion and the wing portion, the second slot is provided on the side of the outer side wall of the wing portion close to the first slot, the second slot extends along the lateral extension direction of the wing portion, the first slot and the second slot are parallel to each other, and starting copper is connected to the first slot and the second slot.

3. The stator and rotor assembly of a motor according to claim 1, characterized in that: Stator winding holes are provided on two pairs of side edges of the large stator, and the positions of the stator winding holes and the arched slots are horizontal and perpendicular.

4. The stator and rotor assembly of a motor according to claim 3, characterized in that: An arc-shaped protrusion is provided on the inner side wall of the central through hole relative to the stator surrounding hole.

5. The stator and rotor assembly of a motor according to claim 1, characterized in that: A strip block is protruded from the outer side wall of the large stator relative to the arched groove.

6. The stator and rotor assembly of a motor according to claim 1, characterized in that: The large stator comprises a plurality of large stator punching sheets stacked up and down, and two adjacent large stator punching sheets are connected together by riveting.

7. The stator and rotor assembly of a motor according to claim 1, characterized in that: The small stator comprises a plurality of small stator punching sheets stacked up and down, and two adjacent small stator punching sheets are connected together by riveting.

8. The stator and rotor assembly of a motor according to claim 1, characterized in that: The angle between the inclined surface and the center line of the arched groove in the horizontal direction is 30 degrees.

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