Low-noise stator punching sheet structure

Abstract

The utility model relates to the technical field of stator punching sheets, in particular to a low-noise stator punching sheet structure, which comprises a punching sheet main body, a plurality of stator teeth are annularly distributed on the punching sheet main body, a stator slot is formed between every two adjacent stator teeth, the bottoms of the stator teeth extend towards two sides to form tooth boots, and the bottoms of the outer ends of the tooth boots are provided with chamfers. The stator slots are chamfered, so that the cogging torque and the torque pulsation are reduced, and the noise during operation is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stator punching sheets, in particular to a low-noise stator punching sheet structure. Background Art

[0002] Stator punchings are generally stamped from silicon steel sheets, with different specifications of punchings to suit the stators of motors of different powers. The existing stator punchings mostly have circular grooves on the inner circle. Since both the stator and rotor slots are open, relatively large tooth torque and torque pulsation are generated, resulting in relatively large noise during operation. Therefore, we propose a low-noise stator punching structure to solve the above problems. Utility Model Content

[0003] The utility model aims to solve the problem that the inner circle of stator punching sheets in the prior art mostly adopts circular grooves, and since both the stator and rotor slots are open, relatively large tooth slot torque and torque pulsation are generated, and a low-noise stator punching sheet structure is proposed.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A low-noise stator punching structure comprises a punching body, a plurality of stator teeth are distributed in an annular shape on the punching body, a stator slot is formed between two adjacent stator teeth, the bottom of the stator tooth extends to both sides to form a tooth shoe, and a cut angle is provided at the bottom of the outer end of the tooth shoe. By chamfering the stator slot, the tooth slot torque and torque pulsation are reduced, thereby reducing the noise during operation.

[0006] As a preferred technical solution of the present invention, the angle of the cutting angle is 6° to 8°.

[0007] As a preferred technical solution of the utility model, the number of the stator teeth is six to sixteen, and the stator teeth are evenly distributed around the center of the punch body.

[0008] As a preferred technical solution of the utility model, a positioning groove is provided on one side of the outer circle of the punching sheet body to position two adjacent punching sheet bodies when the punching sheet bodies are stacked.

[0009] The beneficial effects of the utility model are:

[0010] By chamfering the stator slots, the cogging torque and torque pulsation are reduced, thereby reducing noise during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural schematic diagram of a low-noise stator punching structure proposed by the utility model;

[0012] Figure 2 for Figure 1Schematic diagram of the structure at A in the middle.

[0013] In the figure: 1. punching plate body; 2. stator tooth; 21. tooth shoe; 22. cut corner; 3. stator slot; 4. positioning slot. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0015] Reference Figure 1-2 A low-noise stator punching structure comprises a punching body 1, the outer diameter of the punching body 1 is φ5.492 mm, a plurality of stator teeth 2 are distributed in an annular shape on the punching body 1, the number of the stator teeth 2 is six to sixteen, preferably twelve stator teeth 2, and the stator teeth 2 are evenly distributed around the center of the punching body 1, a stator slot 3 is formed between two adjacent stator teeth 2, the bottom of the stator tooth 2 extends to both sides to form a tooth shoe 21, a cut angle 22 is provided at the bottom of the outer end of the tooth shoe 21, the angle of the cut angle 22 is 6° to 8°, preferably 7°, by chamfering the stator slot 3, the tooth slot torque and torque pulsation are reduced, thereby reducing the noise during operation;

[0016] The interval between the tooth shoes 21 of two adjacent stator teeth 2 is 2.54±0.05mm;

[0017] Furthermore, a positioning groove 4 is provided on one side of the outer circle of the punching sheet body 1 to position two adjacent punching sheet bodies 1 when the punching sheet bodies 1 are stacked.

[0018] In this embodiment, by chamfering the stator slots, the cogging torque and torque pulsation are reduced, thereby reducing the noise during operation. Moreover, the stator chamfering is more efficient and less costly than the stator eccentricity.

[0019] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-noise stator punching structure, comprising a punching body (1), a plurality of stator teeth (2) are distributed in an annular shape on the punching body (1), a stator slot (3) is formed between two adjacent stator teeth (2), and the structure is characterized in that: The bottom of the stator tooth (2) extends to both sides to form a tooth shoe (21), and a cut corner (22) is provided at the bottom of the outer end of the tooth shoe (21).

2. A low-noise stator punching structure according to claim 1, characterized in that: The angle of the cut corner (22) is 6° to 8°.

3. A low-noise stator punching structure according to claim 1, characterized in that: The number of the stator teeth (2) is six to sixteen, and the stator teeth (2) are evenly distributed around the center of the punching sheet body (1).

4. A low-noise stator punching structure according to claim 1, characterized in that: A positioning groove (4) is provided on one side of the outer circle of the punch body (1).

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