Rotor structure with circular supporting sheets

Abstract

A rotor structure with a circular support sheet comprises an iron core, the iron core is formed by stacking at least two silicon steel sheets along the axial direction, a plurality of magnetic steel grooves are uniformly distributed in any silicon steel sheet along the circumferential direction, the magnetic steel grooves of the plurality of silicon steel sheets are stacked to form a slot, magnetic steel is arranged in any slot, and the magnetic steel grooves of the plurality of silicon steel sheets are uniformly distributed along the circumferential direction. The two ends of the iron core are each provided with a dynamic balance plate, the outer diameter of each dynamic balance plate is smaller than that of each silicon steel sheet, a circular supporting piece is arranged between each dynamic balance plate and the iron core, and the outer diameter of each circular supporting piece is smaller than or equal to that of each silicon steel sheet and larger than that of each dynamic balance plate. And the circular supporting sheets cover all the magnetic steels on the end surfaces of the corresponding iron cores. According to the utility model, the circular support sheet adopts a disc-shaped structure, covers all the magnetic steels, and can support the magnetic steels and the silicon steel sheets, thereby preventing the magnetic steels from falling off and the silicon steel sheets from being warped, so that the diameter of the dynamic balance plate can be properly reduced or injection molding is cancelled, and the purposes of reducing cost and increasing efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a permanent magnet motor, and in particular to a rotor structure with a circular supporting sheet. Background Art

[0002] With the rise of new energy vehicles in recent years, competition in the motor industry has intensified, and low-cost design solutions have become the mainstream solution. The rotor, as an important component of the motor, includes magnetic steel, silicon steel sheets, shafts, dynamic balancing plates, press sleeves, injection molding materials and other parts. The rotor cost reduction is mainly aimed at the above parts. For the dynamic balancing plate, the existing technology uses the method of reducing its diameter to reduce costs. However, with the emergence of designs with reduced diameters of dynamic balancing plates, the silicon steel sheets at both ends of the rotor are prone to warping and cracks, and the magnetic steel is easy to fall out, resulting in dynamic imbalance of the rotor during operation, affecting the stability of the rotor operation. Summary of the invention

[0003] The utility model aims to provide a rotor structure with circular support plates, which is intended to solve the problems of magnetic steel falling out and silicon steel sheet warping in the prior art when the diameter of the dynamic balancing disc is reduced.

[0004] The utility model discloses a rotor structure with a circular support sheet, comprising an iron core, wherein the iron core is composed of at least two silicon steel sheets stacked in an axial direction, a plurality of magnetic steel slots are uniformly distributed in a circumferential direction in any silicon steel sheet, the magnetic steel slots of a plurality of silicon steel sheets are stacked to form a slot, and a magnetic steel is arranged in any slot, a dynamic balancing plate is arranged at each end of the iron core, the outer diameter of the dynamic balancing plate is smaller than the outer diameter of the silicon steel sheet, a circular support sheet is arranged between the two dynamic balancing plates and the iron core, the outer diameter of the circular support sheet is smaller than or equal to the outer diameter of the silicon steel sheet and larger than the outer diameter of the dynamic balancing plate, the circular support sheet covers all the magnetic steel on the corresponding end face of the iron core, and a rotating shaft is passed through the dynamic balancing plate, the circular support sheet and the iron core along the axis.

[0005] Furthermore, at least two reinforcing ribs are arranged on the surface of the circular support sheet at intervals along the circumferential direction.

[0006] Furthermore, the surface of the circular support sheet is non-planar.

[0007] Furthermore, there is interference, transition or clearance fit between the circular support sheet and the rotating shaft.

[0008] Furthermore, the circular supporting plate is made of stainless steel.

[0009] Furthermore, the circular support sheet has a thickness greater than or equal to 0.5 mm.

[0010] Furthermore, the circular support piece is fixedly connected to the dynamic balance plate by welding, a fixed structure, or adhesive.

[0011] Compared with the prior art, the utility model has a positive and obvious effect. The circular support sheet of the utility model adopts a disc-shaped structure, covers all magnetic steels, and can support magnetic steels and silicon steel sheets, thereby preventing the magnetic steels from falling out and the silicon steel sheets from warping. In this way, the dynamic balance plate can appropriately reduce the diameter or cancel the injection molding, thereby achieving the purpose of reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an exploded schematic diagram of a rotor structure with a circular support sheet of the utility model.

[0013] Figure 2 It is a schematic diagram of a dynamic balancing plate and a circular support piece in a rotor structure with a circular support piece according to the utility model. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with an embodiment, but the present invention is not limited to the embodiment. Any similar structure and similar changes of the present invention should be included in the protection scope of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and is not a limitation on the technical solution of the present invention.

[0015] like Figure 1 and Figure 2 As shown, a rotor structure with a circular support sheet of the utility model comprises an iron core, wherein the iron core is composed of at least two silicon steel sheets 1 stacked in the axial direction, and a plurality of magnetic steel slots 2 are uniformly distributed in the circumferential direction in any silicon steel sheet 1, and the magnetic steel slots 2 of a plurality of silicon steel sheets 1 are stacked to form a slot, and a magnetic steel 3 is arranged in any slot, and a dynamic balancing plate 4 is respectively arranged at both ends of the iron core, and the outer diameter of the dynamic balancing plate 4 is smaller than the outer diameter of the silicon steel sheet 1, and a circular support sheet 5 is arranged between the two dynamic balancing plates 4 and the iron core, and the outer diameter of the circular support sheet 5 is smaller than or equal to the outer diameter of the silicon steel sheet 1 and larger than the outer diameter of the dynamic balancing plate 4, and the circular support sheet 5 covers all the magnetic steels 3 on the corresponding end face of the iron core, and a rotating shaft 6 is passed through the dynamic balancing plate 4, the circular support sheet 5, and the iron core along the axis.

[0016] Furthermore, at least two reinforcing ribs (not shown) are arranged at intervals along the circumferential direction on the surface of the circular support piece 5 .

[0017] Furthermore, the surface of the circular support sheet 5 is non-planar (not shown in the figure).

[0018] Furthermore, the circular support piece 5 and the rotating shaft 6 are in interference, transition or clearance fit.

[0019] Furthermore, the circular supporting sheet 5 is made of stainless steel.

[0020] Furthermore, the circular support sheet 5 has a thickness greater than or equal to 0.5 mm.

[0021] Furthermore, the circular support piece 5 is fixedly connected to the dynamic balancing plate 4 by welding, a fixing structure, or adhesive.

[0022] Specifically, the silicon steel sheet 1, magnetic steel 3, dynamic balancing plate 4, reinforcing ribs, non-planar structure, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0023] The working principle of this embodiment:

[0024] 1. The circular support sheet 5 adopts a disc-shaped structure, covering all the magnetic steels 3, and can support the magnetic steels 3 and the silicon steel sheets 1, thereby preventing the magnetic steels 3 from falling out and the silicon steel sheets 1 from warping. In this way, the dynamic balance plate 4 can appropriately reduce its diameter or cancel injection molding, thereby achieving the purpose of reducing costs and increasing efficiency.

[0025] 2. The circular support sheet 5 has a simple structure and can be processed by a single-step punching process. When the rotor is assembled, the circular support sheet 5 can be inserted into the shaft together with the dynamic balancing plate 4 or stepped into the shaft separately without adding an additional work station.

[0026] 3. The circular support sheet 5 is formed by stamping or wire cutting, and the reinforcing ribs and the non-planar structure both play a supporting and reinforcing role.

[0027] 4. The circular support piece 5 can be connected to the dynamic balance plate 4 by welding, mechanical structure, adhesive, etc., or they can be assembled separately.

[0028] 5. The rotor is inserted into the shaft according to the axial arrangement sequence of the dynamic balancing plate 4, the circular support plate 5, the iron core, the circular support plate 5, and the dynamic balancing plate 4. When inserting the rotor into the shaft, heating or liquid nitrogen cooling can be used to reduce the interference of the parts.

Claims

1. A rotor structure with a circular support sheet, characterized in that: The invention comprises an iron core, wherein the iron core is formed by at least two silicon steel sheets stacked in an axial direction, a plurality of magnetic steel slots are evenly distributed in any silicon steel sheet along the circumferential direction, the magnetic steel slots of a plurality of silicon steel sheets are stacked to form a slot, a magnetic steel is arranged in any slot, a dynamic balancing plate is arranged at each end of the iron core, the outer diameter of the dynamic balancing plate is smaller than the outer diameter of the silicon steel sheet, a circular supporting plate is arranged between the two dynamic balancing plates and the iron core, the outer diameter of the circular supporting plate is smaller than or equal to the outer diameter of the silicon steel sheet and larger than the outer diameter of the dynamic balancing plate, the circular supporting plate covers all the magnetic steel on the corresponding end face of the iron core, and a rotating shaft is passed through the dynamic balancing plate, the circular supporting plate and the iron core along the axis.

2. A rotor structure with a circular support sheet according to claim 1, characterized in that: At least two reinforcing ribs are arranged on the surface of the circular support sheet at intervals along the circumferential direction.

3. A rotor structure with a circular support sheet according to claim 1, characterized in that: The surface of the circular support sheet is non-planar.

4. A rotor structure with a circular support sheet according to claim 1, characterized in that: The circular support sheet and the rotating shaft are in interference, transition or clearance fit.

5. The rotor structure with circular support plates according to claim 1, characterized in that: The circular supporting piece is made of stainless steel material.

6. A rotor structure with circular support plates according to claim 1, characterized in that: The circular support sheet has a thickness greater than or equal to 0.5 mm.

7. A rotor structure with circular support plates according to claim 1, characterized in that: The circular support piece is fixedly connected to the dynamic balance plate by welding, a fixed structure and adhesive.

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