Fool-proof rotor core, rotor end plate and motor

Abstract

The utility model provides a fool-proof rotor iron core, an end plate and a motor, the rotor iron core comprises a plurality of stacked rotor punching sheets, each rotor punching sheet comprises a rotor hole at the axis, a plurality of linear magnetic steel grooves arranged at the outer side edge of the rotor iron core, and a plurality of permanent magnets arranged in the linear magnetic steel grooves, a plurality of air holes are uniformly formed between the rotor hole and the linear magnetic steel groove, and at least one air hole is in a non-axisymmetric shape relative to the first symmetric axis. Through the mode, the problem that the existing motor rotor iron core is easy to assemble positively and negatively is solved, the assembling efficiency is improved, and the reworking cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a motor rotor with a fool-proof structure. Background Art

[0002] Under the severe situation of global energy and environmental problems, the automotive industry is facing huge challenges, and technological changes in energy conservation and emission reduction are imminent. At present, energy-saving and new energy vehicles have become the strategic focus of national scientific and technological development, among which electric vehicles are the main technical solutions. However, the high cost of electric vehicles is a bottleneck problem restricting its commercialization, and reducing costs is becoming more and more important.

[0003] As one of the core components of new energy vehicles, the manufacturing cost of the motor directly affects the production cost of new energy vehicles. The existing rotor core of new energy vehicle motors generally adopts a superimposed structure. During assembly, the rotor core is easily misassembled, resulting in the need for rework, which invisibly increases production time and reduces production efficiency. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a fool-proof rotor core, a rotor end plate and a motor, which solve the problems of easy forward and reverse misassembly of the existing rotor core and motor assembly.

[0005] The main contents of this utility model include:

[0006] A foolproof rotor core comprises: a plurality of stacked rotor punching sheets;

[0007] Each rotor punching includes a rotor hole at an axis and a plurality of I-shaped magnetic steel slots opened at the outer edge of the rotor core; a plurality of air holes are evenly opened between the rotor hole and the I-shaped magnetic steel slots; the air holes include at least one first air hole and a plurality of second air holes, and the shape of the first air hole is a non-axisymmetric shape relative to a first symmetry axis; the first symmetry axis is a straight line where any radius of the edge arc of the rotor punching corresponding to the first air hole lies.

[0008] Preferably, the first air hole includes a first main body and a positioning notch provided on a side wall of the first main body.

[0009] Preferably, the second air hole includes a second main body; the first main body and the second main body have the same or different shapes.

[0010] Preferably, the first body is in an axisymmetric or non-axisymmetric shape; when the first body is in an axisymmetric shape, the center line of the positioning notch does not coincide with the center line of the first body.

[0011] Preferably, the positioning notch has a shape of one or more of a triangle, a rectangle, a trapezoid, and an arc.

[0012] The utility model also proposes a rotor end plate, which is arranged at both ends of a rotor core, and the rotor core is the above-mentioned fool-proof rotor core; the end plate includes an end plate body, and the end surface of the end plate body is provided with end plate air holes corresponding to the air holes.

[0013] Preferably, the end plate air hole comprises an air hole body and an end plate positioning notch provided outside the air hole body; the shape of the air hole body is the same as that of the first body; and the end plate positioning notch is the same as that of the positioning notch.

[0014] Preferably, when the first main body is of an axisymmetric shape, the number of the end plate positioning notches is two, and they are symmetrically arranged along the center line of the air hole main body.

[0015] Preferably, the end plate body is in a polygonal shape.

[0016] The utility model also proposes a motor, comprising a rotor core and rotor end plates arranged at both ends of the rotor core, wherein the rotor core is the above-mentioned fool-proof rotor core; and / or the rotor end plates are the above-mentioned rotor end plates.

[0017] The beneficial effects of the utility model are:

[0018] 1. By providing at least one first air hole on the rotor punching sheet, the problem of incorrect installation of the rotor core can be solved when assembling the rotor core, saving the time required to confirm the front and back sides of the rotor core during production, avoiding rework caused by incorrect installation of the front and back sides of the core, saving production costs, and improving production efficiency;

[0019] 2. By providing a first end plate air hole corresponding to the first air hole on the end surface of the rotor end plate, the rotor end surface and the rotor core can be quickly assembled; by further providing two symmetrically arranged end plate positioning notches at the axisymmetric first end plate air hole, the operator can quickly assemble the rotor end plate without confirming the smooth surface or rough surface during work, thereby further improving work efficiency;

[0020] 3. The shape of the end plate can be a polygonal shape including a quadrilateral, a hexagon, an octagon, etc., which can save material width. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a rotor core in one of the embodiments;

[0022] Figure 2 is a schematic structural diagram of a rotor core in another embodiment;

[0023] Figure 3 is a structural schematic diagram of the end plate;

[0024] Figure numerals: 1. rotor punching sheet, 11. rotor hole, 12. I-shaped magnetic steel slot, 13. first air hole, 130. positioning notch, 14. second air hole, 15. rivet hole, 16. self-fastening piece, 2. end plate, 20. end plate body, 21. end plate air hole, 210. second positioning notch, L1. center line of the first air hole body, L2. center line of the positioning notch, L3. center line of the end plate air hole. DETAILED DESCRIPTION

[0025] The technical solution protected by the utility model is described in detail below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the utility model proposes a fool-proof rotor core, including a plurality of stacked rotor punchings 1, each rotor punching 1 is made of 0.25-0.35mm silicon steel sheet, and a plurality of silicon steel sheet rotor punchings 1 are stacked to form a rotor core. The design of the rotor punchings can avoid the rotor core from being misassembled in the forward and reverse directions when the rotor is assembled, thereby improving assembly efficiency and reducing rework costs.

[0027] Specifically, a rotor hole 11 is provided at the center of the rotor punching sheet 1, and a plurality of I-shaped magnetic steel slots 12 are arranged in sequence along the circumferential direction on the outer edge of the rotor punching sheet 1. The plurality of I-shaped magnetic steel slots 12 form a regular polygonal structure, and a magnetic isolation bridge is formed between adjacent I-shaped magnetic steel slots 12. A plurality of air holes are evenly provided between the rotor hole 11 and the I-shaped magnetic steel slots 12; the utility model designs some of the air holes, i.e., designs the shape of some of the air holes to be a non-axisymmetric shape, so that when assembling the rotor core, the operator can quickly identify the front and back of the rotor core by distinguishing some of the air holes, thereby avoiding the problem of wrong installation of the front and back.

[0028] Among the plurality of air holes, at least one air hole is selected and recorded as the first air hole 13, and the remaining air holes are called second air holes, wherein the shape of the first air hole 13 is a non-axisymmetric shape, and the relative symmetry axis is a straight line where any radius of the edge arc segment of the rotor punching corresponding to the first air hole is located; in one embodiment, as Figure 2 As shown, the shape of the first air hole 13 is a trapezoid, and the trapezoid is non-axisymmetric relative to a straight line where any radius of the edge arc of the corresponding rotor punching sheet is located. In other embodiments, the shape of the first air hole 13 can be other irregular shapes, such as the shape of one end along the circumferential direction is different from the shape of the other end, which meets the requirements for distinguishing the front and back sides of the rotor core. On the premise of maintaining the function of the original air hole, it can help distinguish the front and back sides of the rotor core.

[0029] like Figure 1 As shown, in one embodiment, the first air hole 13 includes a first body and a positioning notch 130 opened on the side wall of the first body, as shown in FIG. Figure 1 As shown, by opening a positioning groove 130 on the axial outer side of the first main body, in other embodiments, the positioning groove can also be opened on the axial inner side or circumferential side of the first main body, so that the first air hole 13 satisfies the non-axisymmetric shape when any radius along the corresponding arc is the symmetry axis, that is, the operator can distinguish whether the rotor core is placed forward or backward by mistake through the positioning groove 130.

[0030] Furthermore, the shape of the first body can be the same as or different from the shape of the second air hole, wherein the shape of the first body is the same as the shape of the second air hole to reduce the difficulty of processing, such as using the existing air hole shape, such as Figure 1 As shown, at this time, the first main body and the second air hole are axisymmetric figures. In order to enable the positioning slot 130 to play a positioning role, the opening position of the positioning slot 130 is limited so that the center line L2 of the positioning slot 130 does not coincide with the center line L1 of the first main body, that is, the positioning slot 130 needs to be set on the side deviating from the center line of the first main body.

[0031] In other embodiments, the shape of the positioning notch is one or more of a triangle, a rectangle, a trapezoid, and an arc, or any other shape.

[0032] In other embodiments, each layer of the rotor core 1 is provided with a plurality of self-locking plates 16. The rotor core 1 is formed by stacking a plurality of core sheets under pressure, and the function of the self-locking plates 16 is to fix the core sheets together only by the pressure machine.

[0033] like Figure 3 As shown, the utility model further proposes a rotor end plate. The rotor end plates 2 are arranged at both ends of the above-mentioned superimposed rotor cores. The rotor core 1 and the end plates 2 can be assembled together by driving rivets into the rivet holes 15.

[0034] Furthermore, the rotor end plate 2 includes an end plate body 20, and an end plate air hole 21 corresponding to the air hole is opened on the end surface of the end plate body 20. Since the rotor end plate 2 is only needed at both ends of the rotor core 1, each end plate air hole 21 of the rotor end plate 2 has the same shape as the first air hole 13, that is, no matter how the rotor end plate 2 is required to be assembled, the plate positioning notch can correspond to the core positioning notch, and the problem of wrong assembly in the positive and negative directions will not occur, which greatly improves the assembly efficiency of the end plate.

[0035] Specifically, the end plate air hole 21 includes an air hole body and an end plate positioning notch 210 provided outside the air hole body; the shape of the air hole body is the same as that of the first body; the end plate positioning notch 210 is the same as that of the positioning notch 130. Furthermore, the two second positioning notches 210 of each end plate air hole 21 of the rotor end plate 2 are symmetrical along the center line L3 of the end plate air hole. This design is for when the first body is an axisymmetric design, no matter which side of the smooth surface or the burred surface of the rotor end plate 2 is installed outward, the positioning notch 130 of the rotor core can correspond to the position of the end plate positioning notch 210 of the rotor end plate, thereby speeding up the installation efficiency of the end plate 2.

[0036] In addition, in order to save material usage, the outer diameter shape of the rotor end plate 2 is set to be one of a quadrilateral, a hexagon, an octagon, or other polygonal shapes. In this embodiment, the outer diameter shape of the rotor end plate 2 adopts a regular hexagonal structure.

[0037] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A foolproof rotor core, characterized in that: include: A plurality of stacked rotor laminations; Each rotor punching includes a rotor hole at an axis and a plurality of I-shaped magnetic steel slots opened at the outer edge of the rotor core; a plurality of air holes are evenly opened between the rotor hole and the I-shaped magnetic steel slots; the air holes include at least one first air hole and a plurality of second air holes, and the shape of the first air hole is a non-axisymmetric shape relative to a first symmetry axis; the first symmetry axis is a straight line where any radius of the edge arc of the rotor punching corresponding to the first air hole lies.

2. A foolproof rotor core according to claim 1, characterized in that: The first air hole includes a first main body and a positioning notch formed on a side wall of the first main body.

3. A foolproof rotor core according to claim 2, characterized in that: The second air hole includes a second body; the first body and the second body have the same or different shapes.

4. A foolproof rotor core according to claim 2 or 3, characterized in that: The first body is of an axisymmetric or non-axisymmetric shape; when the first body is of an axisymmetric shape, a center line of the positioning notch does not coincide with a center line of the first body.

5. A foolproof rotor core according to claim 4, characterized in that: The positioning notch may be in a shape of one or more of a triangle, a rectangle, a trapezoid, and an arc.

6. A rotor end plate, arranged at both ends of a rotor core, characterized in that: The rotor core is the fool-proof rotor core as described in any one of claims 1 to 5; the end plate comprises an end plate body, and an end plate air hole corresponding to the air hole is opened on the end surface of the end plate body.

7. A rotor end plate according to claim 6, characterized in that: The end plate air hole includes an air hole body and an end plate positioning slot provided on the side wall of the air hole body; the first air hole includes a first body and a positioning slot provided on the side wall of the first body; the shape of the air hole body is the same as that of the first body; the end plate positioning slot is the same as that of the positioning slot.

8. A rotor end plate according to claim 7, characterized in that: When the first main body is of an axisymmetric shape, the number of the end plate positioning notches is two, and they are symmetrically arranged along the center line of the air hole main body.

9. A rotor end plate according to claim 8, characterized in that: The shape of the end plate body is polygonal.

10. A motor, characterized in that: It comprises a rotor core and rotor end plates arranged at both ends of the rotor core, wherein the rotor core is the fool-proof rotor core according to any one of claims 1 to 5; And / or the rotor end plate is the rotor end plate according to any one of claims 6 to 9.

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