CN-224233419-U - Magnetic shoe with step groove

Abstract

The utility model provides a take magnetic shoe in step groove, includes the magnetic shoe main part, and the magnetic shoe main part is the cambered surface tile slice, and the side of all around includes cambered surface minor face and straight face long limit, is equipped with the step groove on the cambered surface minor face, and the last cambered surface that is close to the straight face long limit of both sides is equipped with low-lying oblique angle district. The step groove can be provided with different types of hollows, the rotor can be provided with different fixing structures for fixing the magnetic shoe according to the step groove and different types of hollows, the binding force between the magnetic shoe and the rotor is increased, the problem that the magnetic shoe flies and breaks away under the condition of high rotating speed is avoided, the stability of the structure is improved, and meanwhile, the fixing structures are not arranged on the surface of the magnetic shoe, so that the magnetic efficiency is not influenced.

Inventors

• WANG CHANGQUAN
• TAN CHAO
• ZHU PENGCHENG
• LU ZIJIAN

Assignees

• 浙江露通机电有限公司

Dates

Publication Date

20260512

Application Date

20250127

Priority Date

20241223

Claims (8)

1. 1. A magnetic shoe with a step groove is characterized by comprising a magnetic shoe body, wherein the magnetic shoe body is in a cambered surface tile shape, the peripheral side edges of the magnetic shoe body comprise a cambered surface short side and a straight surface long side, the step groove is formed in the cambered surface short side, the magnetic shoe body comprises an upper cambered surface and a lower cambered surface, the magnetic shoe is arranged on a cylindrical rotor, and the lower cambered surface is attached to the cylindrical rotor.
2. 2. The magnetic shoe with step groove according to claim 1, wherein the upper arc surface of the magnetic shoe body near the long sides of the straight surfaces on both sides is provided with a low-lying bevel area.
3. 3. The magnetic shoe with step groove according to claim 1, wherein the short side of the cambered surface is hollowed out to form the step groove.
4. 4. A magnetic shoe with a step groove according to claim 1 or 3, wherein the step groove is provided with a wavy undercut to form a wavy groove.
5. 5. A magnetic shoe with a step groove according to claim 1 or 3, wherein the step groove is provided with a semicircular hollow to form a semicircular hole groove.
6. 6. The magnetic shoe with step groove according to claim 1, wherein the middle section of the short side of the arc surface is provided with a hollowed-out part along the parallel direction of the arc surface to form the step clamping groove.
7. 7. The stepped-grooved magnetic shoe of claim 1 or 2, wherein the middle section of the upper arc surface and the lower arc surface of the magnetic shoe have the same arc, remain parallel, and the low-lying bevel area of the upper arc surface is recessed by low-lying in the direction of the lower arc surface with a smooth arc.
8. 8. The magnetic shoe with the step groove according to claim 2, wherein the magnetic shoe main body is arranged on a rotor, an envelope ring matched with the step groove is arranged on the rotor to fix the magnetic shoe, and an envelope strip is arranged outside the rotor to cover the low-lying bevel area for fixing.

Description

Magnetic shoe with step groove Technical Field The utility model relates to the technical field of motors, in particular to a magnetic shoe with a step groove. Background The external rotor motor of the brushless motor has the advantages that tile type magnets are needed, the contact area of the traditional tile type magnets is small when the traditional tile type magnets are bonded or injection molded, and the reliability is low. The prior art publication CN2552235Y discloses a permanent magnet piece for an outer rotor type dc motor. The working surface of the magnet sheet and the other surface opposite to the working surface are both convex arc surfaces. The utility model adopts a structure that the working surface of the magnet sheet and the other surface opposite to the working surface are both made into convex arc surfaces, namely, the cross section shape of the magnet sheet is drum-shaped, and the utility model can gradually increase the length of an air gap between each tooth head and the rotor surface of the motor along the circumferential direction from the central part of the tooth head to the opening part between two teeth by adjusting the curvature of the arc surfaces of the working surface and the tooth head of the stator core, and the length of the air gap at the opening part of the two tooth heads is taken as an average value to become smaller value, so that the magnetic resistance difference between two adjacent teeth of the air gap is reduced, and the electromagnetic force is continuously changed due to the continuous change of the air gap and the reduction of the magnetic resistance difference, thereby effectively reducing the abrupt change of the electromagnetic force and improving the vibration and noise brought by the abrupt change of the electromagnetic force. The utility model has the advantages of ingenious design, simple structure and excellent performance. Disclosure of utility model The traditional tile type magnet has small contact area and low reliability when being bonded or injection molded. When the motor rotor is at a high rotating speed, the magnet pieces are easy to fly off, so that the motor is damaged. In order to solve the technical problems, the technical scheme is that the magnetic shoe with the step groove comprises a magnetic shoe main body, wherein the magnetic shoe main body is in a cambered surface tile shape, the peripheral side edges comprise a cambered surface short side and a straight surface long side, the step groove is arranged on the cambered surface short side, and a low-lying bevel area is arranged on the upper cambered surface close to the straight surface long sides on two sides. Specifically, the magnetic shoe main body comprises an upper cambered surface and a lower cambered surface, the magnetic shoe can be arranged on the cylindrical rotor, and the lower cambered surface is attached to the cylindrical rotor. Specifically, the upper half of the short side of the cambered surface is hollowed out to form a step groove. Specifically, the step groove can be provided with a wavy hollow to form a wavy groove. As a further improvement of the utility model, the step groove can be provided with a semicircular hollow to form a semicircular hole groove. As a further improvement of the utility model, the middle section of the short side of the cambered surface is provided with a hollow along the parallel direction of the cambered surface to form a step clamping groove. As a further improvement of the utility model, the middle section of the upper cambered surface of the magnetic shoe and the lower cambered surface of the magnetic shoe have the same radian and are kept parallel, and the low-lying bevel area of the upper cambered surface is reduced by low-lying in the direction of the lower cambered surface with a smooth radian. As a further improvement of the utility model, the magnetic shoe main body is arranged on the rotor, the rotor is provided with an enveloping ring matched with the step groove to fix the magnetic shoe, and the enveloping strip is arranged outside the rotor to cover the low-lying bevel area for fixing. The utility model has the beneficial effects that after the magnetic shoe with the step groove is arranged on the motor rotor, the binding force of the magnetic shoe and the rotor is increased through the step groove and the fixed structure with the corresponding shape on the rotor, the problem that the magnetic shoe is thrown off and separated under the condition of high rotating speed is avoided, the stability of the structure is improved, and meanwhile, the fixed structure is not arranged on the surface of the magnetic shoe, so that the magnetic efficiency is not influenced. Drawings Fig. 1 is a schematic structural diagram of a first embodiment of the present utility model. Fig. 2 is a schematic structural diagram of a second embodiment of the present utility model. Fig. 3 is a side view of a second embodiment of the present utility mod