High-strength rotor punching sheet, motor and vehicle
By adding stress holes on the rotor punching sheets of new energy vehicle motors and optimizing the arrangement of magnetic steel slots, the problem of increased stress in the rotor punching sheets at high speeds is solved, and a stronger bearing capacity and a more stable magnetic isolation bridge are achieved.
Patent Information
- Application Number
- CN202323611760.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-28
AI Technical Summary
The increase in the speed of new energy vehicle motors leads to an increase in stress on the rotor punching plate, and the prior art is difficult to effectively improve the bearing capacity of the rotor punching plate.
By adding stress holes on the rotor punched sheets and optimizing the layout of the inner magnetic steel grooves, outer magnetic steel grooves and stress holes, it is ensured that the stress holes can effectively share the stress at the magnetic isolation bridge.
It improves the overall bearing capacity of the rotor stamping, prevents the deformation of the magnetic isolation bridge, and meets the strength requirements of the motor at high speeds.
Smart Images
Figure CN222381414U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of new energy automobile motors, and specifically relates to a high-strength rotor punching sheet, a motor and a vehicle. Background Art
[0002] The speed requirements of new energy vehicle motors are getting higher and higher, but the space left for the motors is still limited. Under the premise that the outer diameter of the rotor punching cannot be increased, the speed of the motor increases, which will increase the stress on the rotor punching.
[0003] In order to enable the rotor punching to withstand greater stress, it is necessary to improve the rotor punching. The magnetic isolation bridge between the magnetic steel slots of the rotor punching is the part of the rotor punching that is most likely to deform. In order to enable the rotor punching to withstand greater stress, it is first necessary to ensure that the magnetic isolation bridge is not easily deformed. Therefore, this application proposes a high-strength rotor punching that optimizes the arrangement of the magnetic isolation bridge to make the magnetic isolation bridge not easily deformed. Utility Model Content
[0004] The utility model aims to provide a high-strength rotor punching sheet, so as to prevent the magnetic isolation bridge from being easily deformed by optimizing the arrangement of the magnetic isolation bridge.
[0005] To this end, the utility model provides a high-strength rotor punching sheet, comprising: a sheet body, on which a pair of V-shaped inner magnetic steel grooves, a pair of V-shaped outer magnetic steel grooves and a stress circular hole are opened from the inside to the outside along the radial direction; the middle section of the inner magnetic steel groove is a straight section, and the extension lines of the straight sides of the two inner magnetic steel grooves away from the sheet core intersect at a first intersection; the middle section of the outer magnetic steel groove is a straight section, and the extension lines of the straight sides of the two outer magnetic steel grooves away from the sheet core intersect at a second intersection; the distance from the first intersection to the sheet edge along the radial direction is L1; the distance from the second intersection to the sheet edge along the radial direction is L2; the distance from the center of the stress circular hole to the sheet edge along the radial direction is L3; the ratio of L1:L2:L3 is 14~18:6~8:2~3.
[0006] Furthermore, the extension lines of the straight sides of the two inner magnetic steel slots close to the sheet core intersect at the third intersection; the extension lines of the straight sides of the two outer magnetic steel slots close to the sheet core intersect at the fourth intersection; the distance from the third intersection to the first intersection along the radial direction is L4; the distance from the fourth intersection to the second intersection along the radial direction is L5; the diameter of the stress circular hole is L6; the ratio of L4:L1 is 5-7:14-18; the ratio of L5:L2 is 2-4:6-8. The ratio of L6:L3 is 2-2.8:2-3.
[0007] Furthermore, the adjacent ends of the two inner magnetic steel grooves are separated by an inner magnetic isolation bridge; the adjacent ends of the two outer magnetic steel grooves are separated by an outer magnetic isolation bridge; the width of the inner magnetic isolation bridge is D1; the width of the outer magnetic isolation bridge is D2; the ratio of D1:L4 is 1.4~2:5~7; the ratio of D2:L5 is 0.7~1:2~4.
[0008] Furthermore, a pair of inner magnetic steel embedding protrusions are provided on the straight sides of the inner magnetic steel slot close to the core of the sheet; and a pair of outer magnetic steel embedding protrusions are provided on the straight sides of the outer magnetic steel slot close to the core of the sheet.
[0009] On the other hand, the utility model further provides a motor, comprising: the high-strength rotor punching sheet as described above.
[0010] On the other hand, the utility model further provides a vehicle, comprising: the motor as described above.
[0011] The beneficial effect of the utility model is that the utility model adds stress circular holes on the sheet body of the rotor punching sheet, and optimizes the arrangement of the inner magnetic steel slot, the outer magnetic steel slot and the stress circular holes, that is, the radial distance from the first intersection to the sheet edge is L1, the radial distance from the second intersection to the sheet edge is L2, the radial distance from the center of the stress circular hole to the sheet edge is L3, and the ratio of L1:L2:L3 is 14-18:6-8:2-3, so that the stress circular holes with stronger bearing capacity can share the stress of the two magnetic isolation bridges, the magnetic isolation bridges are not easily deformed, and the entire rotor punching sheet can withstand greater stress. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the prior descriptions will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 This is a schematic diagram of the structure of the high-strength rotor punching sheet of the utility model;
[0014] Figure 2 It is a front view of the high-strength rotor punching sheet of the utility model;
[0015] In the figure:
[0016] Sheet 100,
[0017] The inner magnetic steel groove 200, the inner magnetic steel is embedded in the protrusion 210,
[0018] The outer magnetic steel groove 300, the outer magnetic steel is embedded in the protrusion 310,
[0019] Stress round hole 400,
[0020] The first intersection point 510, the second intersection point 520, the third intersection point 530, the fourth intersection point 540,
[0021] Internal magnetic bridge 600,
[0022] External magnetic bridge 700. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments of ordinary technicians in this field without creative work are within the protection scope of the utility model.
[0024] Example:
[0025] like Figure 1 As shown, the utility model provides a high-strength rotor punching sheet, comprising: a sheet body 100, which is provided with a pair of V-shaped inner magnetic steel grooves 200, a pair of V-shaped outer magnetic steel grooves 300 and a stress circular hole 400 along its radial direction from inside to outside; Figure 2 The middle section of the inner magnetic steel slot 200 is a straight section, and the extension lines of the straight sides of the two inner magnetic steel slots 200 away from the center of the sheet intersect at a first intersection 510; the middle section of the outer magnetic steel slot 300 is a straight section, and the extension lines of the straight sides of the two outer magnetic steel slots 300 away from the center of the sheet intersect at a second intersection 520; the radial distance from the first intersection 510 to the edge of the sheet is L1; the radial distance from the second intersection 520 to the edge of the sheet is L2; the radial distance from the center of the stress circular hole 400 to the edge of the sheet is L3; the ratio of L1: L2: L3 is 14-18: 6-8: 2-3.
[0026] By adding stress circular holes 400 on the sheet body 100 of the rotor punching sheet, and optimizing the arrangement of the inner magnetic steel slot 200, the outer magnetic steel slot 300 and the stress circular holes 400, that is, the radial distance from the first intersection 510 to the sheet edge is L1, the radial distance from the second intersection 520 to the sheet edge is L2, the radial distance from the center of the stress circular hole 400 to the sheet edge is L3, and the ratio of L1:L2:L3 is 14-18:6-8:2-3, the stress circular holes 400 with stronger bearing capacity can share the stress of the two magnetic isolation bridges, the magnetic isolation bridges are not easily deformed, and the entire rotor punching sheet can withstand greater stress.
[0027] In at least one embodiment, a reference ratio of the sizes of the inner magnetic steel slot 200, the outer magnetic steel slot 300, and the stress circular hole 400 corresponding to the ratio of L1, L2, and L3 is provided. Figure 2 As shown, the extension lines of the straight sides of the two inner magnetic steel slots 200 close to the sheet core intersect at the third intersection 530; the extension lines of the straight sides of the two outer magnetic steel slots 300 close to the sheet core intersect at the fourth intersection 540; the distance from the third intersection 530 to the first intersection 510 along the radial direction is L4; the distance from the fourth intersection 540 to the second intersection 520 along the radial direction is L5; the diameter of the stress circular hole 400 is L6; the ratio of L4: L1 is 5-7: 14-18; the ratio of L5: L2 is 2-4: 6-8. The ratio of L6: L3 is 2-2.8: 2-3. Thus, the stress circular hole 400 can better share the stress of the two magnetic isolation bridges.
[0028] In at least one embodiment, a reference ratio of the width of the magnetic isolation bridge corresponding to the reference ratio of the size of the inner magnetic steel slot 200 and the outer magnetic steel slot 300 is provided. Figure 1 As shown, the adjacent ends of the two inner magnetic steel slots 200 are separated by an inner magnetic isolation bridge 600; the adjacent ends of the two outer magnetic steel slots 300 are separated by an outer magnetic isolation bridge 700; Figure 2 , the width of the inner magnetic isolation bridge 600 is D1; the width of the outer magnetic isolation bridge 700 is D2; the ratio of D1: L4 is 1.4-2: 5-7; the ratio of D2: L5 is 0.7-1: 2-4. Thus, the stress circular hole 400 can further better share the stress at the inner magnetic isolation bridge 600 and the outer magnetic isolation bridge 700. Specifically, L1, L2, and L3 can be 15.95 unit lengths, 6.8 unit lengths, and 2.5 unit lengths, L4, L5, and L6 can be 5.84 unit lengths, 3.35 unit lengths, and 2.4 unit lengths, and D1 and D2 can be 1.7 unit lengths and 0.85 unit lengths.
[0029] like Figure 1 As shown, the straight sides of the inner magnetic steel slot 200 close to the core of the sheet can be provided with a pair of inner magnetic steel embedding protrusions 210; the straight sides of the outer magnetic steel slot 300 close to the core of the sheet can be provided with a pair of outer magnetic steel embedding protrusions 310.
[0030] In at least one embodiment, a motor is also provided, comprising: the high-strength rotor punching as described above.
[0031] In at least one embodiment, a vehicle is also provided, comprising: the motor as described above.
[0032] In summary, the utility model adds stress circular holes on the sheet body of the rotor punching, and optimizes the arrangement of the inner magnetic steel slot, the outer magnetic steel slot and the stress circular holes, that is, the radial distance from the first intersection to the sheet edge is L1, the radial distance from the second intersection to the sheet edge is L2, the radial distance from the center of the stress circular hole to the sheet edge is L3, and the ratio of L1:L2:L3 is 14-18:6-8:2-3, so that the stress circular holes with stronger bearing capacity can share the stress of the two magnetic isolation bridges, the magnetic isolation bridges are not easily deformed, and the entire rotor punching can withstand greater stress.
[0033] In the embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. The embodiments described above are only exemplary. For example, the division of the mechanism is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0035] Based on the above ideal embodiments of the utility model, through the above description, relevant technicians can make various changes and modifications without departing from the technical concept of the utility model. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A high-strength rotor punching, characterized in that: include: The sheet body (100) is provided with a pair of V-shaped inner magnetic steel grooves (200), a pair of V-shaped outer magnetic steel grooves (300) and a stress circular hole (400) along its radial direction from inside to outside; The middle section of the inner magnetic steel groove (200) is a straight section, and the extension lines of the straight sides of the two inner magnetic steel grooves (200) away from the core intersect at a first intersection point (510); The middle section of the outer magnetic steel groove (300) is a straight section, and the extension lines of the straight sides of the two outer magnetic steel grooves (300) away from the core intersect at a second intersection (520); The distance from the first intersection point (510) to the edge of the sheet along the radial direction is L1; The distance from the second intersection point (520) to the edge of the sheet along the radial direction is L2; The distance from the center of the stress circular hole (400) to the edge of the sheet along the radial direction is L3; The ratio of L1:L2:L3 is 14~18:6~8:2~3.
2. The high-strength rotor punching sheet according to claim 1, characterized in that: The extended lines of the straight sides of the two inner magnetic steel grooves (200) close to the core of the sheet intersect at a third intersection (530); The extended lines of the straight sides of the two outer magnetic steel grooves (300) close to the core of the sheet intersect at a fourth intersection (540); The distance from the third intersection point (530) to the first intersection point (510) along the radial direction is L4; The distance from the fourth intersection point (540) to the second intersection point (520) along the radial direction is L5; The diameter of the stress circular hole (400) is L6; The ratio of L4:L1 is 5-7:14-18; The ratio of L5:L2 is 2-4:6-8; The ratio of L6:L3 is 2~2.8:2~3.
3. The high-strength rotor punching sheet according to claim 2, characterized in that: The adjacent two ends of the two inner magnetic steel grooves (200) are separated by an inner magnetic isolation bridge (600); The adjacent two ends of the two outer magnetic steel slots (300) are separated by an outer magnetic isolation bridge (700); The width of the inner magnetic bridge (600) is D1; The width of the outer magnetic isolation bridge (700) is D2; The ratio of D1:L4 is 1.4-2:5-7; The ratio of D2:L5 is 0.7~1:2~4.
4. The high-strength rotor punching sheet according to claim 3, characterized in that: A pair of inner magnetic steel embedding protrusions (210) are provided on the straight sides of the inner magnetic steel groove (200) close to the core of the sheet; A pair of external magnetic steel embedding protrusions (310) are provided on the straight sides of the external magnetic steel groove (300) close to the core of the sheet.
5. A motor, characterized in that: include: A high strength rotor lamination according to any one of claims 1 to 4.
6. A vehicle, characterized in that: include: The motor as claimed in claim 5.