Rotor structure with iron core axis separated from rotor punching sheet

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a rotor structure with an iron core shaft center separated from a rotor punching sheet, which comprises the rotor punching sheet and the rotor shaft center which are laminated, the rotor punching sheet comprises a plurality of iron core splicing blocks, and the iron core splicing blocks are arranged along the circumferential direction of the rotor shaft center at intervals. A broken bridge is arranged between the periphery of the rotor shaft center and the rotor punching sheet, a permanent magnet groove used for installing a permanent magnet is formed between every two adjacent iron core splicing blocks, the rotor shaft center is arranged in a spiral and sequential superposition mode, a first limiting protruding part is formed on the periphery of the rotor shaft center so as to abut against the side face of the permanent magnet, and a second limiting protruding part is formed on the periphery of the rotor shaft center. According to the utility model, through a novel permanent magnet positioning mode, the position of the permanent magnet is positioned by adopting a rotor axis spiral superposition mode, so that the structural strength of connection among all parts is improved, and the local magnetic leakage phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly refers to a rotor structure in which the core axis is separated from the rotor punching sheet. Background Art

[0002] To meet the current requirements of household appliances, motors are developing towards high power density. Due to its characteristics such as high efficiency, high power density, and fast response, permanent magnet synchronous motors are widely used in the field of household appliances.

[0003] In order to achieve the characteristic of high power density and ensure structural strength in production and manufacturing and facilitate production, the current widely used form of cooperation between punching sheets and permanent magnets is: in the built-in type, the permanent magnets are inserted into the rotor core formed by laminating punching sheets to achieve better motor performance. Structurally, a separated structure of the rotor core axis and the core punching sheet is adopted. The permanent magnets are inserted into the permanent magnet slots of the rotor body formed by laminating punching sheets, that is, the core punching sheets of the rotor core are not directly connected to each other, but by filling plastic-coated materials between the punching sheets of each rotor core and the rotor core axis, the core punching sheets of the rotor core, the rotor core axis, and the permanent magnets are plastic-coated and connected into one body. The separated structure of the rotor core axis and the core punching sheet can reduce magnetic leakage and achieve the effect of improving motor performance.

[0004] Since it is necessary to hold the permanent magnets, a supporting part for clamping the permanent magnets needs to be reserved in the punching sheet structure, and the design of this part of the supporting part will cause an increase in magnetic leakage. Therefore, this structure needs to be further improved. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a rotor structure in which the core axis is separated from the rotor punching sheet, and by means of spiral stacking of the rotor axis, the structural strength of the connection between components is improved and the phenomenon of local magnetic leakage is reduced.

[0006] The purpose of the utility model is achieved as follows: A rotor structure in which the core axis is separated from the rotor punching sheet, including laminated rotor punching sheets and a rotor axis. The rotor punching sheets include several core segments, and the several core segments are arranged at intervals along the circumferential direction of the rotor axis. A broken bridge is provided between the outer periphery of the rotor axis and the rotor punching sheets. A permanent magnet slot for installing a permanent magnet is formed between every two adjacent core segments. The rotor axis is arranged in a spiral and stacked manner in sequence, and a first limiting convex part is formed on the outer periphery of the rotor axis to abut against the side surface of the permanent magnet.

[0007] Preferably, a material-saving hole is opened in the core segment, and two punching sheet buckling holes are opened in the core segment, and the two punching sheet buckling holes are respectively located on both sides of the material-saving hole.

[0008] Preferably, the iron core segments are triangular, and two second limiting protrusions are formed at one end of the iron core segment to abut against the other side surface of the permanent magnet.

[0009] Preferably, a shaft center fastening hole is formed in the rotor shaft center.

[0010] Preferably, a plastic coating is formed on the outer periphery of the rotor, and thimble holes are provided on the surface of the plastic coating.

[0011] The prominent and beneficial technical effects of the present utility model compared with the prior art are as follows:

[0012] By means of a new type of positioning permanent magnet, the present utility model positions the permanent magnet in a spiral superposition manner of the rotor shaft center, improves the structural strength of the connection between components, and reduces the generation of local magnetic leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic three-dimensional structure of the present utility model Figure 1 .

[0014] Figure 2 is a schematic three-dimensional structure of the present utility model Figure 2 .

[0015] Figure 3 is a schematic structural diagram of the rotor punching sheet and the rotor shaft center.

[0016] Figure 4 is a schematic structural diagram of the rotor shaft center.

[0017] Reference numerals: 1-rotor punching sheet; 2-rotor shaft center; 3-iron core segment; 4-broken bridge; 5-permanent magnet; 6-permanent magnet slot; 7-first limiting protrusion; 8-material-saving hole; 9-punching sheet fastening hole; 10-second limiting protrusion; 11-shaft center fastening hole; 12-plastic coating; 13-thimble hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings.

[0019] As Figures 1-4 shown, a rotor structure with a separated iron core shaft center and rotor punching sheet includes stacked rotor punching sheets 1 and rotor shaft center 2. The rotor punching sheet 1 includes a plurality of iron core segments 3, and the plurality of iron core segments 3 are circumferentially spaced along the rotor shaft center 2. A broken bridge 4 is provided between the outer periphery of the rotor shaft center 2 and the rotor punching sheet 1. A permanent magnet slot 6 for installing a permanent magnet 5 is formed between every two adjacent iron core segments 3. The rotor shaft center 2 is stacked in a spiral manner in sequence. A first limiting protrusion 7 is formed on the outer periphery of the rotor shaft center 2 to abut against the side surface of the permanent magnet 5.

[0020] The utility model positions the permanent magnet by means of a novel positioning permanent magnet, and adopts a spiral superposition mode at the rotor axis center to position the permanent magnet, improving the structural strength of the connection between components and reducing the generation of local magnetic leakage.

[0021] Through the design of the broken bridge, the air gap at this place is increased, so that a closed magnetic circuit cannot be formed between the rotor laminations, ensuring excellent magnetic isolation effect, avoiding or weakening the generation of local magnetic leakage, reducing heat loss, lowering the temperature of the motor, and improving the motor performance.

[0022] A material-saving hole 8 is formed in the iron core block 3, which can save raw materials, reduce costs and reduce the weight of the rotor. Two lamination buckling holes 9 are formed in the iron core block 3, and the two lamination buckling holes 9 are respectively located on both sides of the material-saving hole 8. Through fasteners, the laminated rotor laminations can be riveted and buckled together.

[0023] The iron core block 3 is triangular. Two second limiting convex parts 10 are formed at one end of the iron core block 3 to abut against the other side of the permanent magnet 5. There are several first limiting convex parts 7 on the outer periphery of each lamination. The spiral angle and spiral direction of the spiral rotor axis center laminations can be set arbitrarily, and there is at least one or more axis supporting parts on its outer periphery to support the permanent magnet, so that the permanent magnet will not shake after being inserted into the permanent magnet slot, ensuring the stability of the product structure, reducing the defective rate of the product, and being beneficial to mass automated production.

[0024] An axis buckling hole 11 is formed in the rotor axis center 2 for riveting and buckling the laminated rotor axis centers together.

[0025] A plastic coating 12 is formed on the outer periphery of the rotor, thereby improving the connection strength between components. A thimble hole 13 is provided on the surface of the plastic coating 12.

[0026] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. A rotor structure in which the core axis and the rotor punching are separated, characterized in that: The invention comprises a stacked rotor sheet (1) and a rotor shaft (2), wherein the rotor sheet (1) comprises a plurality of core pieces (3), wherein the plurality of core pieces (3) are arranged at intervals along the circumference of the rotor shaft (2), a thermal break bridge (4) is arranged between the outer periphery of the rotor shaft (2) and the rotor sheet (1), a permanent magnet slot (6) for mounting a permanent magnet (5) is formed between every two adjacent core pieces (3), the rotor shaft (2) is arranged in a spiral manner and stacked one after another, and a limiting convex portion (7) is formed on the outer periphery of the rotor shaft (2) to abut against the side of the permanent magnet (5).

2. The rotor structure with the core axis and rotor punching separated according to claim 1, characterized in that: A material-saving hole (8) is provided in the iron core block (3), and two punching plate buckle holes (9) are provided in the iron core block (3). The two punching plate buckle holes (9) are respectively located on both sides of the material-saving hole (8).

3. The rotor structure with the core axis and rotor punching separated according to claim 1, characterized in that: The core block (3) is triangular in shape, and one end of the core block (3) is formed with two limiting protrusions (10) to abut against the other side of the permanent magnet (5).

4. The rotor structure with the core axis and rotor punching separated according to claim 1, characterized in that: A shaft center buckle hole (11) is provided in the rotor shaft center (2).

5. The rotor structure with the core axis and rotor punching separated according to claim 1, characterized in that: A plastic overmolding part (12) is formed on the outer periphery of the rotor, and a pinhole (13) is provided on the surface of the plastic overmolding part (12).

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