Novel rotor punching sheet

Abstract

A novel rotor punching sheet comprises a rotor punching sheet body, a shaft hole is formed in the rotor punching sheet body, a plurality of welding points are annularly distributed on the periphery of the shaft hole, the welding points are located outside the shaft hole, and the distance d is reserved between the welding points and the hole edge of the shaft hole; the distance d ranges from 0.3 mm to 0.8 mm; the welding points are arc-shaped; a plurality of groups of welding grooves are annularly distributed in the periphery of the shaft hole, each group of welding grooves comprises two welding grooves which are arranged at intervals, and a welding point is located between the two welding grooves; the welding groove is arc-shaped; the welding points and the welding grooves are in smooth transition. According to the rotor punching sheet, the welding points are arranged outside the shaft hole, a certain distance is reserved between the welding points and the hole edge of the shaft hole, and after a plurality of rotor punching sheets are welded, the whole welding flux is positioned outside the shaft hole, so that the installation of the rotor shaft in the shaft hole is not influenced, and the welding flux on the welding points does not need to be cleaned; the production efficiency of the rotor can be improved, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of rotor lamination technology, and in particular to a novel rotor lamination. Background Technology

[0002] The motor rotor consists of multiple rotor laminations, which are stacked and welded together. The rotor laminations have shaft holes for mounting the rotor shaft. Figures 4-5 As shown, the welding point 111 of the rotor lamination is located on the edge 112 of the shaft hole. After multiple rotor laminations are welded, some of the solder 113 will be located inside the shaft hole, which will affect the installation of the rotor shaft. Therefore, before installing the rotor shaft, the solder 113 located inside the shaft hole needs to be cleaned, which results in low rotor production efficiency.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of rotor lamination that is simple in structure, has high production efficiency, good product quality, is easy to install, and is highly practical, so as to overcome the shortcomings of the existing technology.

[0005] A novel rotor lamination designed for this purpose includes a rotor lamination body with a shaft hole and a plurality of welding points distributed in a ring around the shaft hole. The characteristic feature is that the welding points are located outside the shaft hole, and a distance d is left between the welding points and the edge of the shaft hole.

[0006] The distance d is 0.3 to 0.8 mm.

[0007] The weld joint is arc-shaped.

[0008] The shaft hole has several sets of welding grooves distributed in a ring around its perimeter. Each set of welding grooves includes two spaced-apart welding grooves, and the welding point is located between the two welding grooves.

[0009] The welding groove is arc-shaped.

[0010] The welding point and the welding groove have a smooth transition.

[0011] The welding groove is connected to the edge of the shaft hole by a slanted line segment.

[0012] The number of welding points is more than 10.

[0013] The inner wall of the shaft hole is provided with a positioning protrusion for positioning the rotor lamination body.

[0014] The rotor lamination body has several sets of mounting slots distributed in a ring for mounting permanent magnets.

[0015] The rotor lamination of this utility model sets the welding point outside the shaft hole, leaving a certain distance between the welding point and the edge of the shaft hole. After multiple rotor laminations are welded, the solder is located outside the shaft hole as a whole, so it will not affect the installation of the rotor shaft inside the shaft hole. This eliminates the need to clean the solder on the welding point, which can improve the production efficiency of the rotor and improve the quality of the product. Attached Figure Description

[0016] Figure 1 This is a partial schematic diagram of the rotor laminations before welding in one embodiment of the present invention.

[0017] Figure 2 This is a partial schematic diagram of the rotor laminations after welding in one embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the overall structure of the rotor lamination in one embodiment of the present invention.

[0019] Figure 4 This is a partial schematic diagram before welding of traditional rotor laminations.

[0020] Figure 5 This is a partial schematic diagram of the traditional rotor laminations after welding. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] See Figures 1-3 The novel rotor lamination includes a rotor lamination body 1, on which a shaft hole 2 is provided. The shaft hole 2 is used to install a rotor shaft. Several welding points 8 are distributed in a ring around the shaft hole 2. Multiple rotor laminations are stacked and then welded through the welding points 8. The welding points 8 are located outside the shaft hole 2, that is, the welding points 8 are recessed outward into the lamination body 1. A distance d is left between the welding points 8 and the edge 3 of the shaft hole 2.

[0023] A distance d of 0.3 to 0.8 mm ensures that after welding multiple rotor laminations, the solder 9 is located outside the shaft hole 2, and the preferred distance d is 0.5 mm.

[0024] The shape of welding point 8 is arc-shaped, making welding easier.

[0025] The circumference of the shaft hole 2 is surrounded by several sets of welding grooves 4. Each set of welding grooves 4 includes two spaced welding grooves 4. The welding point 8 is located between the two welding grooves 4. The welding grooves 4 are used to accommodate the solder 9.

[0026] The welding groove 4 is arc-shaped.

[0027] The smooth transition between welding point 8 and welding groove 4 can improve welding quality.

[0028] The welding groove 4 is connected to the edge 3 of the shaft hole 2 by a diagonal line segment 5.

[0029] The number of welding points 8 is more than 10. In this embodiment, the number of welding points 8 is 12, and correspondingly, the number of welding grooves 4 is 24.

[0030] The inner wall of the shaft hole 2 is provided with a positioning protrusion 6 for positioning the rotor lamination body 1. The positioning protrusion 6 facilitates the positioning of the rotor laminations during the stacking of rotor laminations, making the stacking and fixing of the rotor laminations more reliable. The positioning protrusion 6 is distributed in a ring on the inner wall of the shaft hole 2.

[0031] The rotor lamination body 1 has several sets of mounting slots 7 for mounting permanent magnets distributed in a ring. Each set of mounting slots 7 includes two mounting slots 7, and there are 12 sets of mounting slots 7.

[0032] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel rotor lamination, comprising a rotor lamination body (1), wherein a shaft hole (2) is provided on the rotor lamination body (1), and a plurality of welding points (8) are distributed in a ring around the shaft hole (2), characterized in that: The welding point (8) is located outside the shaft hole (2), and there is a distance d between the welding point (8) and the edge (3) of the shaft hole (2).

2. The novel rotor lamination according to claim 1, characterized in that: The distance d is 0.3 to 0.8 mm.

3. The novel rotor lamination according to claim 2, characterized in that: The welding point (8) is arc-shaped.

4. The novel rotor lamination according to claim 3, characterized in that: The circumference of the shaft hole (2) is surrounded by several sets of welding grooves (4). Each set of welding grooves (4) includes two weld grooves (4) spaced apart. The welding point (8) is located between the two weld grooves (4).

5. The novel rotor lamination according to claim 4, characterized in that: The welding groove (4) is arc-shaped.

6. The novel rotor lamination according to claim 5, characterized in that: The welding point (8) and the welding groove (4) are smoothly transitioned.

7. The novel rotor lamination according to claim 6, characterized in that: The welding groove (4) is connected to the edge (3) of the shaft hole (2) by a diagonal line segment (5).

8. The novel rotor lamination according to claim 1, characterized in that: The number of welding points (8) is more than 10.

9. The novel rotor lamination according to claim 1, characterized in that: The inner wall of the shaft hole (2) is provided with a positioning protrusion (6) for positioning the rotor lamination body (1).

10. The novel rotor lamination according to claim 1, characterized in that: The rotor lamination body (1) has several sets of mounting slots (7) for mounting permanent magnets distributed in a ring.

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