Rotor punching sheet and rotor and motor using same

Abstract

The utility model discloses a rotor punching sheet, and a rotor and a motor using the same. The rotor punching sheet comprises a disc-shaped punching sheet body and a plurality of magnetic poles which are arranged on the punching sheet body and are distributed along the circumferential direction. Each magnetic pole at least comprises a pair of first magnetic steel grooves; each pair of first magnetic steel grooves are symmetrically distributed about the center line of the D axis of the magnetic pole; the mutual distance between each pair of first magnetic steel grooves is gradually widened in the outer circumferential direction of the punching sheet body along the center line of the D-axis of the magnetic pole; the distances between every two adjacent pairs of first magnetic steel grooves in the circumferential direction of the punching sheet body are different, and the distances between every two adjacent pairs of first magnetic steel grooves in the circumferential direction of the punching sheet body are the same. According to the utility model, by changing the mutual distance between the two pairs of first magnetic steel grooves along the circumferential direction of the punching sheet body, the rotation self-skewed pole effect is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor punching sheet and a rotor and a motor using the same. Background Art

[0002] The rotor in the motor includes a rotor core formed from stacked silicon steel sheets, which are formed by stacking and fixing rotor punchings. Prior art regarding rotor punchings, such as patent publication number CN 216312783 U, discloses a permanent magnet motor rotor punching and permanent magnet motor rotor with a skewed pole structure. The rotor punchings used in the patent have multiple groups of magnetic steel slots on the axial end face, each group of magnetic steel slots including a first magnetic steel slot and a second magnetic steel slot, with the first and second magnetic steel slots arranged in a V-shape. The inner hole of the rotor punching is provided with a first locating key and a second locating key, which are arranged alternately along the circumference of the rotor punching.

[0003] For another example, patent publication number CN219779870U discloses a permanent magnet synchronous motor, in which the rotor includes a rotor core formed by stacking silicon steel sheets. The rotor core has mounting slots for permanent magnets and an outer magnetic isolation bridge located at the outer edge of the rotor core.

[0004] The staggered-pole design of the rotor cores in the two aforementioned disclosed technologies requires careful attention to the front and back of the core during assembly, making the assembly process cumbersome, increasing the complexity of the process and the cost of tooling. Furthermore, given that oil cooling is currently the most common cooling method for new energy motors, the staggered-pole design can lead to blocked oil circuits, thus compromising the motor's cooling performance.

[0005] Therefore, from the perspective of simplifying the rotor core assembly process, its structure needs to be further improved. Utility Model Content

[0006] The first purpose of the utility model is to provide a rotor punching sheet to solve the technical problem of simplifying the rotor core assembly process.

[0007] The second object of the present invention is to provide a rotor to solve the technical problem of simplifying the rotor core assembly process.

[0008] The third object of the present utility model is to provide a motor to solve the technical problem of simplifying the assembly process of the rotor core of the motor.

[0009] The rotor punching of the utility model is realized as follows:

[0010] A rotor punching sheet, comprising:

[0011] A disc-shaped punching body and a plurality of circumferentially distributed magnetic poles provided on the punching body; each magnetic pole includes at least a pair of first magnetic steel slots;

[0012] Each pair of first magnetic steel slots is symmetrically distributed about the center line of the magnetic pole D axis; and the mutual distance between each pair of first magnetic steel slots gradually widens along the center line of the magnetic pole D axis toward the outer circumference of the punching sheet body; and

[0013] The mutual distances between two adjacent pairs of first magnetic steel slots along the circumferential direction of the punching sheet body are different, and the mutual distances between two adjacent pairs of first magnetic steel slots along the circumferential direction of the punching sheet body are the same.

[0014] In an optional implementation of the utility model, each magnetic pole further includes a pair of second magnetic steel slots;

[0015] Each pair of second magnetic steel slots are symmetrically distributed about the center line of the magnetic pole D axis; and

[0016] Each pair of second magnetic steel slots is located in an area corresponding to a pair of first magnetic steel slots and the outer circumference of the punching sheet body.

[0017] In an optional implementation of the utility model, the mutual distances between each two adjacent pairs of second magnetic steel slots along the circumferential direction of the punching sheet body are the same.

[0018] In an optional embodiment of the utility model, the mutual spacing between each two adjacent pairs of second magnetic steel slots along the circumferential direction of the punching body is different, and the mutual spacing between each two adjacent pairs of second magnetic steel slots along the circumferential direction of the punching body is the same.

[0019] In an optional implementation of the utility model, each pair of the first magnetic steel slots are arranged in a V-shape or an eight-shape; and

[0020] Each pair of the second magnetic steel slots is arranged in a V-shape, an eight-shape, or a straight-shape.

[0021] In an optional embodiment of the utility model, at least two overlapping riveting points are further provided on the punch body along the circumferential direction; and

[0022] The overlapping riveting point on one axial side end face of the punch body is a concave hole, and the overlapping riveting point on the other axial side end face of the punch body is a boss suitable for matching with the concave hole of the other punch body.

[0023] The rotor of the present invention is realized as follows:

[0024] A rotor, comprising: a rotor core and a rotor shaft for cooperating with the rotor core; the rotor core is formed by laminating a plurality of rotor punchings; wherein

[0025] The center of the punching body of each rotor punching sheet is provided with an axial hole for matching with the rotor shaft.

[0026] In an optional embodiment of the utility model, the edge of the shaft hole is provided with a pair of positioning keys symmetrically distributed about the axis of the shaft hole; and

[0027] One of the pair of positioning keys is provided with an identification portion.

[0028] In an optional implementation of the utility model, a main oil channel is provided on the rotor shaft; and

[0029] The punching body of each rotor punching is respectively provided with iron core oil channels which are distributed at intervals along the circumferential direction and outside the shaft hole.

[0030] The motor of the present utility model is realized as follows:

[0031] A motor includes: the rotor described above.

[0032] By adopting the above-mentioned technical solution, the rotor punching of the present invention and the rotor and motor using the same, compared with the traditional technology of designing the deflection angle of the positioning key between the center line of the punching magnetic steel slot and the shaft hole to achieve the rotor skew pole, the utility model achieves the self-skewing pole effect by changing the mutual spacing between the two pairs of first magnetic steel slots along the circumferential direction of the punching body. While also reducing the motor tooth slot torque, it also simplifies the rotor assembly process and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a rotor punching sheet proposed in the utility model;

[0034] Figure 2 This is a schematic diagram of the iron core oil passage of a rotor punching proposed in the present invention;

[0035] Figure 3 This is a schematic structural diagram of an oil cooling structure for a rotor proposed in the present utility model;

[0036] Figure 4 This is a structural schematic diagram of an oil guide groove 1 of an oil cooling structure of a rotor proposed in the present invention;

[0037] Figure 5 This is a structural schematic diagram of the core oil channel 1 of the rotor oil cooling structure proposed by the present invention;

[0038] Figure 6 This is a structural schematic diagram of an oil guide groove 2 of an oil cooling structure of a rotor proposed in the present invention;

[0039] Figure 7This is a structural schematic diagram of the iron core oil passage 2 of the oil cooling structure of a rotor proposed in the present invention;

[0040] Figure 8 This is a structural schematic diagram of an oil guide groove three of an oil cooling structure of a rotor proposed in the utility model.

[0041] In the figure: punching body 1, first magnetic steel slot 2, magnetic pole D axis center line K, second magnetic steel slot 3, overlap rivet point 4, positioning key 5, identification part 6, shaft hole 7, rotor shaft 10, main oil channel 11, first oil hole 12, oil guide groove 1 13, second oil hole 14, third oil hole 15, dynamic balancing plate 1 20, oil guide groove 2 21, oil outlet hole 1 22, rotor core 30, core oil channel 1 31, core oil channel 2 32, dynamic balancing plate 2 40, oil guide groove 3 41, oil outlet hole 2 42, rotor pressing sleeve 50. DETAILED DESCRIPTION

[0042] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0043] Example 1:

[0044] See also Figure 1 and Figure 2 As shown, this embodiment provides a rotor punching, comprising: a disc-shaped punching body 1, and a plurality of circumferentially distributed magnetic poles arranged on the punching body 1; each magnetic pole includes at least a pair of first magnetic steel slots 2; each pair of first magnetic steel slots 2 are symmetrically distributed about the magnetic pole D-axis center line K; and the mutual spacing between each pair of first magnetic steel slots 2 gradually widens along the magnetic pole D-axis center line K toward the outer circumference of the punching body 1.

[0045] Furthermore, the mutual distances between two adjacent pairs of first magnetic steel slots 2 along the circumferential direction of the punching body 1 are different, and the mutual distances between two adjacent pairs of first magnetic steel slots 2 along the circumferential direction of the punching body 1 are the same.

[0046] In addition, each magnetic pole of this embodiment also includes a pair of second magnetic steel slots 3; each pair of second magnetic steel slots 3 are symmetrically distributed about the center line K of the magnetic pole D axis; and each pair of second magnetic steel slots 3 are located in the interval formed by the pair of first magnetic steel slots 2 corresponding to the outer circumference of the punching sheet body 1.

[0047] In this regard, in a first optional implementation, the mutual spacing between each two adjacent pairs of second magnetic steel slots 3 along the circumferential direction of the punching body 1 is the same. In a second optional implementation, the mutual spacing between each two adjacent pairs of second magnetic steel slots 3 along the circumferential direction of the punching body 1 is different, and the mutual spacing between every other two adjacent pairs of second magnetic steel slots 3 along the circumferential direction of the punching body 1 is the same.

[0048] As an example of an optional situation with reference to the accompanying drawings, each pair of first magnetic steel slots 2 is arranged in a V-shape or an eight-shape. Each pair of second magnetic steel slots 3 is arranged in a V-shape, an eight-shape, or a straight shape. When each pair of second magnetic steel slots 3 is arranged in a V-shape or an eight-shape, the mutual spacing between each pair of second magnetic steel slots 3 gradually widens along the center line K of the magnetic pole D axis toward the outer circumference of the punching body 1. Magnets (i.e., rectangular permanent magnets) are installed in each pair of first magnetic steel slots 2 and each pair of second magnetic steel slots 3 to form a double V-shaped magnetic pole structure. A high salient pole ratio can be obtained by the V-shape or eight-shape arrangement.

[0049] Here, in conjunction with the case where each pair of first magnetic steel slots 2 is V-shaped, regarding the case where the mutual spacing between each two adjacent pairs of first magnetic steel slots 2 along the circumferential direction of the punching body 1 is different, and the mutual spacing between each two adjacent pairs of first magnetic steel slots 2 along the circumferential direction of the punching body 1 is the same, it can be understood that the angles of the V-shape formed by each two adjacent pairs of first magnetic steel slots 2 are different, and the angles of the V-shape formed by each two adjacent pairs of first magnetic steel slots 2 are the same. With reference to the accompanying drawings, for the angles of the V-shapes formed by two adjacent pairs of first magnetic steel slots 2, one of which is angle a and the other is angle b, then a≠b.

[0050] In addition, it should be noted that at least two rivet points 4 are provided on the punch body 1 along the circumferential direction; and the rivet point 4 on one axial side end face of the punch body 1 is a concave hole, and the rivet point 4 on the other axial side end face of the punch body 1 is a boss suitable for cooperating with the concave hole of the other punch body 1.

[0051] As an example, referring to the accompanying drawings, the cross-section of the overlap rivet point 4 is rectangular, with the long side of the overlap rivet point 4 facing the center of the shaft hole 7. When the two rotor punchings are stacked, the protruding overlap rivet point 4 of the upper rotor punching is embedded in the recessed overlap rivet point 4 of the lower rotor punching. Through continuous punching by the punch press, multiple rotor punchings are stacked to form the rotor core.

[0052] In summary, for the rotor punching of this embodiment, compared with the traditional technology of designing the deflection angle of the positioning key 5 of the center line of the punching magnetic steel slot and the shaft hole 7 to achieve the rotor tilting, this embodiment achieves the self-tilting effect of the rotor by changing the mutual spacing between the two pairs of first magnetic steel slots 2 along the circumferential direction of the punching body 1. While also reducing the motor slot torque, it also simplifies the rotor assembly process and improves production efficiency.

[0053] Example 2:

[0054] See also Figure 1 and Figure 2As shown, based on the rotor punchings of Example 1, this embodiment provides a rotor, including: a rotor core and a rotor shaft for cooperating with the rotor core; the rotor core is formed by stacking multiple rotor punchings of Example 1; wherein the center of the punching body 1 of each rotor punching is provided with an axial hole 7 for cooperating with the rotor shaft.

[0055] Furthermore, a pair of positioning keys 5 are provided on the edge of the shaft hole 7 and are symmetrically distributed about the axis of the shaft hole 7. One of the positioning keys 5 is provided with an identification portion 6. The identification portion 6 can be used to identify the direction of the rotor punching.

[0056] Example 3:

[0057] See also Figures 1 to 8 As shown, based on the rotor of Example 2, the rotor provided in this embodiment is further designed with an oil cooling structure. A main oil channel 11, a first oil hole 12 and an oil guide groove 13 are provided on the rotor shaft 10 of the rotor. The first oil hole 12 connects the main oil channel 11 and the oil guide groove 13. The oil guide groove 13 is used to divide the oil into two streams and transport them to both ends of the oil guide groove 13.

[0058] The main oil passage 11 penetrates the rotor shaft 10 along its central axis, the oil guide groove 13 is provided on the outer periphery of the rotor shaft 10 and extends along the axial direction of the rotor shaft 10, and the first oil hole 12 is perpendicular to the axial direction of the rotor shaft 10.

[0059] The rotor core 30 is provided with core oil passages, which include core oil passage 1 31 and core oil passage 2 32. Core oil passage 1 31 and core oil passage 2 32 are spaced apart along the circumference of the rotor core 30, with the main oil passage 11 located between the rotor core 30 and the rotor shaft 10.

[0060] More specifically, the rotor shaft 10 is further provided with a dynamic balancing plate 1 20 and a dynamic balancing plate 2 40 . Dynamic balancing plate 1 20 is attached to one end of the rotor core 30 and is provided with an oil guide groove 21 and an oil outlet hole 1 22 . Oil guide groove 21 is connected to one end of oil guide groove 1 13 . Dynamic balancing plate 2 40 is attached to the other end of the rotor core 30 and is provided with an oil guide groove 3 41 and an oil outlet hole 2 42 . Oil guide grooves 3 41 and oil outlet hole 2 42 are spaced apart circumferentially around dynamic balancing plate 2 40 . Oil guide groove 3 41 is connected to the other end of oil guide groove 1 13 . Cooling oil is split into two streams through oil guide groove 13 and delivered to oil guide groove 2 21 and oil guide groove 3 41 , respectively.

[0061] Furthermore, the core oil passage 1 31 connects the oil guide groove 2 21 and the oil outlet hole 2 42 , and the core oil passage 2 32 connects the oil guide groove 3 41 and the oil outlet hole 1 22 . The oil guide groove 21 inside the dynamic balancing plate 1 20 is connected to the oil outlet hole 2 42 inside the dynamic balancing plate 2 40 through the core oil passage 1 31 .

[0062] As an example of an optional situation, with reference to the accompanying drawings, there are four oil guide grooves 13, which are symmetrically arranged on the outer circumference of the rotor shaft 10, four oil guide grooves 21 and four oil outlet holes 1 22 are each provided, and the four oil guide grooves 21 and the four oil outlet holes 1 22 are spaced apart along the circumference of the dynamic balancing plate 20; the oil guide grooves 21 are arranged at an angle to the radius of the dynamic balancing plate 20; four oil guide grooves 3 41 and four oil outlet holes 2 42 are each provided, and the four oil guide grooves 3 41 and the four oil outlet holes 2 42 are spaced apart along the circumference of the dynamic balancing plate 2 40; the oil guide grooves 3 41 are arranged at an angle to the radius of the dynamic balancing plate 2 40.

[0063] It should also be noted that the rotor shaft 10 is further provided with a rotor pressing sleeve 50, which abuts against the outer side of the second dynamic balancing plate 40. The rotor shaft 10 is also provided with a second oil hole 14 and a third oil hole 15, which are arranged parallel to the first oil hole 12.

[0064] For the rotor of this embodiment: when oil cooling is required, the cooling oil is first pumped out from the oil tank by the oil pump and transported to the main oil channel 11 inside the rotor shaft 10 through the oil pipe. Then, the cooling oil is transported to the inside of the oil guide groove 1 13 through the first oil hole 12. The cooling oil is transported to the inside of the oil guide groove 2 21 and the inside of the oil guide groove 3 41 through the oil guide groove 1 13. Then, the two streams of cooling oil are transported to the inside of the iron core oil channel 1 31 and the iron core oil channel 2 32 through the oil guide groove 2 21 and the oil guide groove 3 41. Oil guide groove three 41 is provided at both ends of the rotor core 30, so that the cooling oil is transported in opposite directions inside the core oil channel one 31 and the core oil channel two 32. Finally, the cooling oil is discharged through the oil outlet hole one 22 and the oil outlet hole two 42 at both ends, thereby improving cooling. In addition, a second oil hole 14 and a third oil hole 15 are provided on one side of the rotor shaft 10. The cooling oil is discharged from the bearing through the second oil hole 14 to lubricate and cool the bearing, and then discharged to the gear pair through the third oil hole 15 to lubricate and cool the gear pair.

[0065] For the rotor of this embodiment, compared with the iron core staggered pole arrangement structure in traditional technology, the oil path resistance of the rotor core formed by the stacking of the rotor punching sheets of this embodiment is greatly reduced, the oil path is more unobstructed, and the heat dissipation effect is better.

[0066] Example 4:

[0067] Based on the rotor of Example 2 or Example 3, this embodiment provides a motor, including: the rotor of Example 2 or Example 3.

[0068] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0069] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0070] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0071] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0072] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0073] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A rotor punching, characterized in that: include: A disc-shaped punching sheet body and a plurality of circumferentially distributed magnetic poles provided on the punching sheet body; Each magnetic pole includes at least a pair of first magnetic steel slots; Each pair of first magnetic steel slots is symmetrically distributed about the center line of the magnetic pole D axis; and the mutual distance between each pair of first magnetic steel slots gradually widens along the center line of the magnetic pole D axis toward the outer circumference of the punching sheet body; and The mutual distances between two adjacent pairs of first magnetic steel slots along the circumferential direction of the punching sheet body are different, and the mutual distances between two adjacent pairs of first magnetic steel slots along the circumferential direction of the punching sheet body are the same.

2. The rotor punching according to claim 1, characterized in that: Each magnetic pole also includes a pair of second magnetic steel slots; Each pair of second magnetic steel slots are symmetrically distributed about the center line of the magnetic pole D axis; and Each pair of second magnetic steel slots is located in an area corresponding to a pair of first magnetic steel slots and the outer circumference of the punching sheet body.

3. The rotor punching according to claim 2, characterized in that: The mutual distances between each two adjacent pairs of second magnetic steel grooves along the circumferential direction of the punching sheet body are the same.

4. The rotor punching according to claim 2, characterized in that: The mutual distances between two adjacent pairs of second magnetic steel slots along the circumferential direction of the punching sheet body are different, and the mutual distances between two adjacent pairs of second magnetic steel slots along the circumferential direction of the punching sheet body are the same.

5. The rotor punching according to any one of claims 2 to 4, characterized in that: Each pair of the first magnetic steel slots is arranged in a V-shape or an eight-shape; and Each pair of the second magnetic steel slots is arranged in a V-shape, an eight-shape, or a straight-shape.

6. The rotor punching according to any one of claims 1 to 4, characterized in that: At least two overlapping riveting points are also provided on the punch body along the circumferential direction; and The overlapping riveting point on one axial side end face of the punch body is a concave hole, and the overlapping riveting point on the other axial side end face of the punch body is a boss suitable for matching with the concave hole of the other punch body.

7. A rotor, characterized in that: include: A rotor core and a rotor shaft for cooperating with the rotor core; the rotor core is formed by laminating a plurality of rotor punchings according to any one of claims 1 to 6; in The center of the punching body of each rotor punching sheet is provided with an axial hole for matching with the rotor shaft.

8. The rotor according to claim 7, characterized in that A pair of positioning keys are provided on the edge of the shaft hole and are symmetrically distributed around the axis of the shaft hole; and One of the pair of positioning keys is provided with an identification portion.

9. The rotor according to claim 7 or 8, characterized in that The rotor shaft is provided with a main oil channel; and The punching body of each rotor punching is respectively provided with iron core oil channels which are distributed at intervals along the circumferential direction and outside the shaft hole.

10. A motor, characterized in that: include: A rotor as claimed in any one of claims 7 to 9.

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