Motor stator punching sheet

Abstract

The utility model relates to a motor stator punching sheet which comprises an annular punching sheet body, the inner circle edge of the punching sheet body is provided with two first arrangement areas and two second arrangement areas, the positions of the two first arrangement areas are opposite, the positions of the two second arrangement areas are opposite, and the two second arrangement areas are located between the two first arrangement areas; a plurality of stator grooves which are uniformly distributed at intervals are formed in the first arrangement areas, the adjacent stator grooves are mutually isolated through spacers, inner bulges are arranged on the two opposite side edges of groove openings of the stator grooves towards the inner sides, and the stator grooves in the two first arrangement areas are symmetrically arranged; first grooves which are uniformly distributed at intervals are formed in the second arrangement area; the arc length of the inner arc of the first arrangement area is L1, and the included angle alpha of the connecting lines from the midpoints of the ends of the two adjacent spacers to the center of the inner circle of the punching sheet body is smaller than 1 / 7 * L1. According to the invention, the mute effect and the power of the motor can be better improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of motor stator, in particular to a motor stator lamination. BACKGROUND

[0002] The general motor stator is formed by stacking multiple layers / pieces of motor stator laminations, and the thickness of the motor stator lamination is relatively thin in general, which is convenient for processing and manufacturing, and also convenient for maintenance and repair, etc.

[0003] The current relatively traditional motor stator lamination, such as the one disclosed in Chinese Patent Publication No. CN221828674U, includes a stator yoke, which is a first circular ring; multiple stator tooth portions, which are all connected with the inner wall surface of the first circular ring and are sequentially and spacedly arranged around the center of the first circular ring; and a stator slot formed between any two adjacent stator tooth portions.

[0004] However, the inventor believes that this motor rotor lamination still has room for improvement in terms of noise reduction and power. CONTENT OF THE UTILITY MODEL

[0005] In order to better improve the quietness and power of the motor.

[0006] The motor stator lamination provided by the present application adopts the following technical solutions:

[0007] A motor stator lamination includes a lamination body in the shape of a ring, two first arrangement areas and two second arrangement areas are arranged on the inner circular edge of the lamination body, the positions of the two first arrangement areas are opposite to each other, the positions of the two second arrangement areas are opposite to each other, and the two second arrangement areas are located between the two first arrangement areas; multiple stator slots are arranged in the first arrangement areas in a spaced and uniform manner, adjacent stator slots are isolated from each other by spacers, opposite sides of the slot opening of the stator slot are both provided with inner protrusions towards the inner side, and the stator slots in the two first arrangement areas are symmetrically arranged; a first groove is arranged in the second arrangement area in a spaced and uniform manner; the arc length of the first arrangement area is L1, and the included angle between the line connecting the midpoint of the end portion of the adjacent two spacers and the center of the inner circle of the lamination body is α < 1 / 7*L1.

[0008] In some embodiments, the depth of the stator slot is H1, the depth of the first groove is H2, and the thickness of the inner protrusion is L2, and L2≤H2<1 / 5*H1.

[0009] In some embodiments, the arc length of the second arrangement area is L3, the diameter of the inner circle of the lamination body is D, and L3≤1 / 9*ΠD.

[0010] In some embodiments, the minimum width of the spacer is L4, the minimum width of the stator slot is L5, the distance between two inner protrusions in the stator slot is L6, L6 < L4 ≤ L5.

[0011] In some embodiments, the distance between the opposite two sides in the stator slot gradually increases from the slot opening to the slot bottom, and the depths of all the stator slots are equal.

[0012] In some embodiments, the diameter of the tangent circle of all the stator slots is L7, the diameter of the circle where the outer edge of the punching piece body is located is L8, L7 ≤ 3 / 4 * L8.

[0013] In some embodiments, the outer edge of the punching piece body is circumferentially distributed with four straight tangent edges, and the punching piece body outer edge between the straight tangent edge and the adjacent two straight tangent edges is provided with a welding groove.

[0014] In some embodiments, the welding protrusion is arranged in the middle of the slot bottom of the welding groove, and the highest point of the welding protrusion is close to or flush with the slot opening of the welding groove.

[0015] In some embodiments, the edge of the spacer end is a flat arc edge.

[0016] In some embodiments, the edge of the spacer end is provided with at least one second groove, the depth of the second groove is equal to the depth of the first groove, and the slot opening width of the second groove is not greater than the slot opening width of the first groove.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: by improving the layout of the stator slots on the inner ring of the punching piece body and adding a second arrangement area, and arranging a first groove in the second arrangement area, on the one hand, the defect of fewer stator slots can be improved, and on the other hand, through the arrangement of the first groove, the noise defect can be improved, and the power is also improved compared with the traditional stator. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structure schematic diagram of a motor stator punching piece in an embodiment of the present application.

[0019] Fig. 2 is a front structure schematic diagram of a motor stator punching piece in an embodiment of the present application.

[0020] Fig. 3 is a front structure schematic diagram of a motor stator punching piece in another embodiment of the present application.

[0021] Explanation of reference signs: 1, punching piece body; 2, stator slot; 3, spacer; 4, inner protrusion; 5, first groove; 6, straight tangent edge; 7, welding groove; 8, welding protrusion; 9, second groove. DETAILED DESCRIPTION

[0022] The application will be further described below with reference to the accompanying drawings Figs. 1 to 3 The application is further described in detail.

[0023] The application discloses a motor stator lamination, referring to Fig. 1 , comprising a lamination body 1 in a ring shape, the lamination body 1 has an inner circular edge and an outer circular edge, the lamination body 1 inner circular edge is provided with two first arrangement areas and two second arrangement areas, the positions of the two first arrangement areas are opposite, the positions of the two second arrangement areas are opposite, and the two second arrangement areas are located between the two first arrangement areas; a plurality of stator slots 2 are arranged in the first arrangement area and are spaced and uniformly distributed, adjacent stator slots 2 are isolated from each other by a partition 3, and opposite sides of the slot opening of the stator slot 2 are both provided with an inner protrusion 4 on the inner side, and the stator slots 2 in the two first arrangement areas are symmetrically arranged; the inner circular arc length of the first arrangement area is L1, and the included angle α of the line connecting the midpoint of the end of the adjacent two partitions 3 to the center of the inner circle of the lamination body 1 is less than 1 / 7*L1, so that the number of stator slots 2 can be effectively arranged and controlled, so that the number of stator slots 2 is not too small, and after being assembled into a motor, the overall power is not affected, and if it is used in cooperation with a matched rotor, the improvement of the motor power will be more obvious.

[0024] The second arrangement area of the embodiment is provided with a first groove 5 which is spaced and uniformly distributed; if it is set that the depth of the stator slot 2 is H1, the depth of the first groove 5 is H2, and the thickness of the inner protrusion 4 is L2, in order not to affect the power of the motor, L2≤H2<1 / 5*H1 should be met, in addition, if it is set that the arc length of the second arrangement area is L3, and the diameter of the inner circle of the lamination body 1 is D, in order to ensure that the noise is not too large, L3≤1 / 9*ΠD is designed.

[0025] At the same time, the design of the number of stator slots 2 is more reasonable, if it is set that the minimum width of the partition 3 is L4, the minimum width of the stator slot 2 is L5, and the distance between the two inner protrusions 4 in the stator slot 2 is L6, then L6<L4≤L5, the distance between the opposite sides in the stator slot 2 gradually increases from the slot opening to the slot bottom, and the depths of all stator slots 2 are equal; in addition, if it is set that the diameter of the outer circle tangent to all stator slots 2 is L7, and the diameter of the circle where the outer edge of the lamination body 1 is located is L8, then L7≤3 / 4*L8.

[0026] In the embodiment, the outer edge of the lamination body 1 is uniformly distributed with four straight cutting edges 6 along the circumference, and the lamination body 1 outer edge between the adjacent two straight cutting edges 6 is provided with a welding groove 7, wherein the welding groove 7 has a welding protrusion 8 in the middle of the groove bottom, and the highest point of the welding protrusion 8 is close to or flush with the slot opening of the welding groove 7.

[0027] Generally, the edge of the end of the spacer 3 in the embodiment is a flat arc-shaped edge. Of course, in order to improve performance, at least one second groove 9 can be arranged at the edge of the end of the spacer 3, wherein the depth of the second groove 9 is equal to the depth of the first groove 5, and the slot width of the second groove 9 is not greater than the slot width of the first groove 5.

[0028] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A motor stator lamination, comprising an annular lamination body (1), characterized in that, The inner edge of the lamination body (1) is provided with two first arrangement areas and two second arrangement areas. The two first arrangement areas are opposite to each other, and the two second arrangement areas are opposite to each other. The two second arrangement areas are located between the two first arrangement areas. Multiple stator slots (2) are provided in the first arrangement area. Adjacent stator slots (2) are separated from each other by partitions (3). The two sides of the slot opening of the stator slot (2) are provided with inward protrusions (4). The stator slots (2) in the two first arrangement areas are symmetrically arranged. The second arrangement area is provided with first grooves (5) that are provided in the second arrangement area. The arc length of the inner circle of the first arrangement area is L1. The angle α between the midpoint of the end of the two adjacent partitions (3) and the line connecting the center of the inner circle of the lamination body (1) is <1 / 7*L1.

2. The motor stator lamination according to claim 1, characterized in that, The depth of the stator groove (2) is H1, the depth of the first groove (5) is H2, and the thickness of the inner protrusion (4) is L2, where L2≤H2<1 / 5*H1.

3. A motor stator lamination according to claim 2, characterized in that, The arc length of the second arrangement area is L3, and the diameter of the inner circle of the lamination body (1) is D, L3≤1 / 9*ΠD.

4. A motor stator lamination according to claim 1, characterized in that, The minimum width of the partition (3) is L4, the minimum width of the stator slot (2) is L5, and the distance between the two inner protrusions (4) in the same stator slot (2) is L6, where L6 < L4 ≤ L5.

5. A motor stator lamination according to claim 1, characterized in that, The distance between the opposite sides of the stator slot (2) gradually increases from the slot opening to the bottom of the slot, and all stator slots (2) have the same depth.

6. A motor stator lamination according to claim 1, characterized in that, The diameter of the outer circle tangent to all the stator slots (2) is L7, and the diameter of the outer circle of the lamination body (1) is L8, where L7 ≤ 3 / 4 * L8.

7. A motor stator lamination according to claim 1, characterized in that, The outer edge of the stamp body (1) is evenly distributed with four straight cutting edges (6) along the circumference. Weld grooves (7) are provided on the outer edge of the stamp body (1) between the straight cutting edges (6) and the two adjacent straight cutting edges (6).

8. A motor stator lamination according to claim 7, characterized in that, The bottom of the welding groove (7) is provided with a welding protrusion (8), and the highest point of the welding protrusion (8) is close to the groove opening of the welding groove (7) or flush with the groove opening of the welding groove (7).

9. A motor stator lamination according to claim 1, characterized in that, The edge of the end of the partition (3) is a flat arc edge.

10. A motor stator lamination according to claim 1, characterized in that, The edge of the partition (3) is provided with at least one second groove (9), the depth of the second groove (9) is equal to the depth of the first groove (5), and the groove width of the second groove (9) is not greater than the groove width of the first groove (5).

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