Motor rotor structure and motor
By setting keyway groups on the rotor laminations to achieve assembly at a predetermined slant angle, the high cost and assembly error problems caused by multiple sets of molds in the prior art are solved, and low-cost and high-efficiency rotor structure production is realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU LVKON NEW ENERGY TECH CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-02
Smart Images
Figure CN224319125U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a motor rotor structure and a motor. Background Technology
[0002] The operating conditions of new energy drive motors are quite complex. Under low torque and high speed conditions, motor noise is prone to occur, severely impacting the driver's experience. Therefore, the industry often uses skewed rotor design to reduce cogging torque, improve torque ripple, electromagnetic vibration, and weaken specific harmonic electromagnetic forces, thereby reducing noise.
[0003] Currently, continuous skew stage structures are generally formed by segmented staggered stacking of rotor laminations. This requires at least two sets of lamination dies to produce rotor laminations. This not only consumes a lot of time in the design and production stages, increasing production costs, but also introduces assembly errors, affecting motor efficiency and vibration characteristics. Utility Model Content
[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the existing technology generally forms a continuous inclined stage structure by segmenting and staggering the stacking of rotor laminations, which requires at least two sets of lamination dies to produce rotor laminations. This not only takes a lot of time in the design and production stages, increasing production costs, but also introduces assembly errors, affecting motor efficiency and vibration characteristics.
[0005] To solve the above-mentioned technical problems, this utility model provides a motor rotor structure, including multiple stacked rotor laminations, wherein the skew angle between the rotor lamination segments is θ, and the rotor laminations include...
[0006] The lamination body is a circular plate structure, and a central through hole is coaxially formed on the lamination body;
[0007] A keyway assembly, comprising a first keyway, a second keyway, a third keyway, and a fourth keyway spaced circumferentially on its inner wall around the central through hole. With the first keyway as a reference, the second keyway, the third keyway, and the fourth keyway rotate relative to the first keyway by angles of 90°-θ, 180°-2θ, and 270°-3θ, respectively. Furthermore, the bottom surfaces of the first keyway, the second keyway, the third keyway, and the fourth keyway are respectively provided with marking grooves of different shapes.
[0008] In one embodiment of this utility model, a mounting shaft is included, and a plurality of rotor laminations are coaxially sleeved on the mounting shaft. A flat keyway extending along its length direction is provided on the side of the mounting shaft, and a flat key for connecting with the first keyway / second keyway / third keyway / fourth keyway is fitted in the flat keyway.
[0009] In one embodiment of this utility model, the first keyway, the second keyway, the third keyway and the fourth keyway are all rectangular slots that match the flat key.
[0010] In one embodiment of this utility model, the rotor laminations are stacked in six pieces, and the six rotor laminations are sequentially connected to the flat key through their second keyway, third keyway, fourth keyway, fourth keyway, third keyway and second keyway.
[0011] In one embodiment of the present invention, two balance plates are coaxially sleeved on the mounting shaft, respectively close to its two ends, and a plurality of rotor laminations are stacked between the two balance plates.
[0012] In one embodiment of this utility model, the balance plate is a circular plate.
[0013] In one embodiment of this utility model, the cross-section of the marking groove is V-shaped, semi-circular, rectangular, or trapezoidal.
[0014] In one embodiment of the present invention, the first keyway, the second keyway, the third keyway and the fourth keyway all extend in a direction parallel to the axial direction of the central through hole.
[0015] In one embodiment of this utility model, a plurality of weight-reducing holes are symmetrically formed on the lamination body.
[0016] An electric motor structure includes the electric motor rotor structure as described in any of the preceding claims.
[0017] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:
[0018] The present invention discloses a motor rotor structure and a motor, comprising multiple stacked rotor laminations, wherein the oblique angle between the rotor laminations is θ, and each rotor lamination includes a lamination body with a central through hole coaxially formed thereon; a keyway assembly, comprising a first keyway, a second keyway, a third keyway, and a fourth keyway evenly spaced around the central through hole on its inner wall, wherein the second keyway, the third keyway, and the fourth keyway rotate relative to the first keyway by angles of 90°-θ, 180°-2θ, and 270°-3θ, respectively, and different shaped marking grooves are formed on the bottom surfaces of the first keyway, the second keyway, the third keyway, and the fourth keyway. The rotor laminations of this rotor structure are equipped with multiple keyways with predetermined inter-segment skew angles. During assembly, multiple rotor laminations stacked sequentially are connected to a flat key on the mounting shaft in a predetermined keyway sequence. This allows multiple rotor laminations of the same structure to be assembled into rotor structures with different skew angles. Therefore, only one set of lamination die needs to be designed and manufactured, which not only reduces the design and production cycle of the lamination die but also significantly reduces production costs. Furthermore, it minimizes assembly errors introduced by multiple sets of lamination dies, avoiding any impact on the efficiency and vibration characteristics of the motor. Attached Figure Description
[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0020] Figure 1 This is a perspective view of the motor rotor structure of a preferred embodiment of the present invention;
[0021] Figure 2 This is an exploded view of the motor rotor structure of a preferred embodiment of this utility model;
[0022] Figure 3 This is a schematic diagram of the rotor laminations and parallel keys of a preferred embodiment of the motor rotor structure of this utility model.
[0023] Figure 4 This is a schematic diagram of the rotor laminations of a motor rotor structure according to a preferred embodiment of the present invention.
[0024] Explanation of reference numerals in the accompanying drawings: 1. Rotor lamination; 11. Lamination body; 111. Center through hole; 12. Keyway group; 121. First keyway; 122. Second keyway; 123. Third keyway; 124. Fourth keyway; 125. Marking groove; 2. Mounting shaft; 3. Flat key; 4. Balance plate; 5. Bushing. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.
[0026] Example 1: Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses a motor rotor structure comprising multiple stacked rotor laminations 1, wherein the slant angle between segments of the rotor laminations 1 is θ.
[0027] The lamination body 11 is a circular plate structure, and a central through hole 111 is coaxially opened on the lamination body 11.
[0028] The keyway assembly 12 includes a first keyway 121, a second keyway 122, a third keyway 123, and a fourth keyway 124 that are circumferentially spaced on the inner wall of the central through hole 111. With the first keyway 121 as a reference, the second keyway 122, the third keyway 123, and the fourth keyway 124 are rotated at angles of 90°-θ, 180°-2θ, and 270°-3θ relative to the first keyway 121, respectively. Marking grooves 125 of different shapes are respectively provided on the bottom surfaces of the first keyway 121, the second keyway 122, the third keyway 123, and the fourth keyway 124.
[0029] Specifically, in this embodiment, six rotor laminations 1 are provided. The six rotor laminations 1 are sequentially sleeved on the mounting shaft 2. When installing each rotor lamination 1, they are distinguished by the marking grooves 125 on each keyway, so that the six rotor laminations 1 are sequentially connected to the flat key through their second keyway 122, third keyway 123, fourth keyway 124, third keyway 123, and second keyway 122, thereby realizing the predetermined V-shaped inclined stage.
[0030] It is conceivable that the rotor lamination 1 of this rotor structure is provided with multiple keyways with predetermined inter-segment skew angles. During assembly, multiple rotor laminations 1 stacked sequentially are connected to the flat key 3 on the mounting shaft 2 in a predetermined keyway sequence. This allows multiple rotor laminations 1 with the same structure to obtain rotor structures with different skew angles after assembly. In this way, only one set of lamination molds needs to be designed and manufactured, which not only reduces the design and manufacturing cycle of lamination molds, but also greatly reduces the production cost. At the same time, it also reduces the assembly errors introduced by multiple sets of lamination molds, avoiding the impact on the efficiency and vibration characteristics of the motor.
[0031] Furthermore, including the mounting shaft 2, multiple rotor laminations 1 are coaxially sleeved on the mounting shaft 2, and a flat keyway extending along its length is provided on the side of the mounting shaft 2, and a flat key for connecting with the first keyway 121 / second keyway 122 / third keyway 123 / fourth keyway 124 is fitted in the flat keyway.
[0032] Furthermore, the first keyway 121, the second keyway 122, the third keyway 123 and the fourth keyway 124 are all rectangular slots that match the flat key.
[0033] Furthermore, the rotor laminations 1 are stacked in six pieces, and the six rotor laminations 1 are connected to the flat key in sequence through the second keyway 122, the third keyway 123, the fourth keyway 124, the third keyway 123, and the second keyway 122. The V-shaped inclined stage can be realized through the above assembly sequence.
[0034] Furthermore, two balance plates 4 are coaxially mounted on the mounting shaft 2, respectively close to its two ends, with multiple rotor laminations 1 stacked between the two balance plates 4. By setting two balance plates 4, the final weight of the rotor is balanced, so that the rotation center of the rotor is located on its central axis.
[0035] Furthermore, the balance plate 4 is a circular plate structure with a central hole.
[0036] Furthermore, the cross-section of the marking groove 125 is V-shaped, semi-circular, rectangular, or trapezoidal, but is not limited to the above shapes, and can be set according to actual needs.
[0037] Furthermore, the first keyway 121, the second keyway 122, the third keyway 123 and the fourth keyway 124 all extend in a direction parallel to the axial direction of the central through hole 111.
[0038] Furthermore, multiple weight-reduction holes are symmetrically provided on the lamination body 11. By setting weight-reduction holes, the weight of the rotor can be reduced, its dynamic response can be improved, the heat dissipation performance of the rotor can be improved, and the material cost can be reduced.
[0039] Furthermore, a bushing 5 is also fitted onto the mounting shaft 2.
[0040] Example 2: This utility model also discloses a motor structure, including the motor rotor structure as in Example 1.
[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A motor rotor structure comprising multiple stacked rotor laminations, wherein the slant angle between rotor lamination segments is θ, characterized in that: The rotor laminations include, The lamination body is a circular plate structure, and a central through hole is coaxially formed on the lamination body; A keyway assembly, comprising a first keyway, a second keyway, a third keyway, and a fourth keyway spaced circumferentially on its inner wall around the central through hole. With the first keyway as a reference, the second keyway, the third keyway, and the fourth keyway rotate relative to the first keyway by angles of 90°-θ, 180°-2θ, and 270°-3θ, respectively. Furthermore, the bottom surfaces of the first keyway, the second keyway, the third keyway, and the fourth keyway are respectively provided with marking grooves of different shapes.
2. The motor rotor structure according to claim 1, characterized in that: Includes a mounting shaft, with multiple rotor laminations coaxially sleeved on the mounting shaft, and a flat keyway extending along its length is provided on the side of the mounting shaft, with a flat key fitted in the flat keyway for connecting with the first keyway / second keyway / third keyway / fourth keyway.
3. The motor rotor structure according to claim 2, characterized in that: The first keyway, the second keyway, the third keyway, and the fourth keyway are all rectangular slots that match the flat key.
4. The motor rotor structure according to claim 3, characterized in that: The rotor laminations are stacked in six pieces, and the six rotor laminations are connected to the flat key in sequence through their second keyway, third keyway, fourth keyway, fourth keyway, third keyway and second keyway.
5. The motor rotor structure according to claim 2, characterized in that: The mounting shaft is also coaxially fitted with two balance plates, which are located near its two ends, and multiple rotor laminations are stacked between the two balance plates.
6. The motor rotor structure according to claim 5, characterized in that: The balance plate is a circular plate.
7. The motor rotor structure according to claim 1, characterized in that: The cross-section of the marking groove is V-shaped, semi-circular, rectangular, or trapezoidal.
8. The motor rotor structure according to claim 1, characterized in that: The first keyway, the second keyway, the third keyway and the fourth keyway all extend in a direction parallel to the axial direction of the central through hole.
9. The motor rotor structure according to claim 1, characterized in that: The lamination body is also symmetrically provided with multiple weight-reduction holes.
10. A motor structure, characterized in that: Includes the motor rotor structure as described in any one of claims 1-9.