Rotor lamination, motor rotor and motor
Patent Information
- Application Number
- CN202522834346.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-12-31
AI Technical Summary
[0009] The present invention further describes that the left end bearing of the rotating shaft is connected to a rear end cover, the right end bearing of the rotating shaft is connected to a front end cover, the rear end cover and the front end cover are connected to a housing by bolts, the housing has a stator fixed inside, and the rotor is located inside the stator and on the same axis.
Smart Images
Figure CN224862863U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of motor technology, specifically relating to a rotor lamination, a motor rotor, and a motor. Background Technology
[0002] Servo motors, as high-precision, high-response actuators, are widely used in applications requiring extremely high dynamic performance, such as robots, CNC machine tools, and automated equipment. The rotor, as the core component of a servo motor, directly affects key performance indicators such as torque output, speed stability, response speed, and temperature rise.
[0003] In existing technologies, rotor designs employing asymmetrical magnetic pole structures are prevalent for purposes such as optimizing magnetic circuits and utilizing reluctance torque. For example, two magnet slots under the same pole may be arranged in an asymmetrical V-shape, or magnet slots of different sizes and shapes may be used. While these asymmetrical designs theoretically allow for adjustment of specific parameters, in practical manufacturing and applications, especially in the field of high-performance servo motors, they introduce inherent and insurmountable drawbacks: a surge in manufacturing complexity and cost, difficulties in production management and quality control, inconsistencies and uncontrollability in electromagnetic performance, and challenges in mechanical dynamic balancing. This phenomenon has become a problem urgently needing to be solved by those in the field. Utility Model Content
[0004] The purpose of this invention is to provide a rotor lamination, a motor rotor, and a motor for existing devices, in order to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a rotor lamination, wherein the rotor lamination is in the shape of a circular plate, a plurality of magnetic slots are formed on the surface of the rotor lamination, a shaft hole is formed in the center of the rotor lamination, the magnetic slots are rectangular and arranged at equal intervals around the axis of the rotor lamination, the number of magnetic slots is even, and pin holes and heat dissipation holes are formed on the surface of the rotor lamination, the cross-section of the heat dissipation hole is composed of an isosceles triangle and a rectangle, and the radius of the line where the magnetic slots are located is smaller than the radius of the line where the pin holes and heat dissipation holes are located.
[0006] The present invention further explains that the length of the magnet slot is half the radius of the rotor lamination, the radial position of the magnet slot is far from the axis of the rotor lamination, the apex of the isosceles triangle faces the pin hole and is on the same radial line as the midpoint of the pin hole, the pin hole and the heat dissipation hole are arranged along the radial line of the rotor lamination and are located between the two magnet slots, and the rotor lamination is axially symmetrical.
[0007] An electric motor rotor includes rotor laminations as described above, a plurality of rotor laminations are stacked to form a rotor, the rotor is fixed by inserting pins into a plurality of corresponding pin holes, the magnet slots on the rotor laminations are coaxially stacked to form a passage and are fitted with main magnets, and the shaft hole is interference-fitted with a rotating shaft.
[0008] An electric motor, comprising a rotor as described above.
[0009] The present invention further describes that the left end bearing of the rotating shaft is connected to a rear end cover, the right end bearing of the rotating shaft is connected to a front end cover, the rear end cover and the front end cover are connected to a housing by bolts, the housing has a stator fixed inside, and the rotor is located inside the stator and on the same axis.
[0010] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: the rotor laminations adopt a completely symmetrical structure, which makes the output torque more stable, and the uniformly distributed magnetic flux reduces the iron core loss of the rotor and ensures the balance of magnetic pull; by setting the radius of the magnetic slot to be smaller than the radius of the pin hole and the heat dissipation hole, and the heat dissipation hole formed by isosceles triangles and rectangles, the stability of the magnetic lines of force is ensured; compared with traditional servo motors, the axial dimension is shortened while the torque remains unchanged, and the functional density is higher, which makes it easier for customers to optimize their internal structure and reduce costs. Attached Figure Description
[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the motor of this utility model; Figure 2 This is a schematic diagram of the motor explosion of this utility model; Figure 3 This is a schematic diagram of the rotor lamination of this utility model; Figure 4 This is a schematic diagram of the connection between the rotor and the shaft of this utility model; In the diagram: 1. Motor; 2. Rear end cover; 3. Housing; 4. Front end cover; 5. Rotor; 501. Shaft; 502. Main magnet; 503. Rotor lamination; 504. Pin hole; 505. Heat dissipation hole; 506. Magnet slot; 507. Shaft hole; 6. Stator. Detailed Implementation
[0012] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0013] Please see Figure 1-4 The present invention provides a technical solution: an electric motor, including a motor 1 and a rotor 5, the rotor 5 being located inside the motor 1, the rotor 5 including a rotor lamination 503, the rotor lamination 503 being circular, the surface of the rotor lamination 503 having a plurality of magnetic steel grooves 506, the center of the rotor lamination 503 having a shaft hole 507, the magnetic steel grooves 506 being rectangular and equally spaced around the axis of the rotor lamination 503, the number of magnetic steel grooves 506 being even, the length of the magnetic steel grooves 506 being half the radius of the rotor lamination 503, and the radial position of the magnetic steel grooves 506 being far away from the axis of the rotor lamination 503; The rotor lamination 503 has a pin hole 504 and a heat dissipation hole 505 on its surface. The cross-section of the heat dissipation hole 505 is composed of an isosceles triangle and a rectangle. The apex of the isosceles triangle faces the pin hole 504 and is on the same radial line as the midpoint of the pin hole 504. The pin hole 504 and the heat dissipation hole 505 are arranged along the radial line of the rotor lamination 503 and are located between the two magnet slots 506. The rotor lamination 503 is axially symmetrical, and the radius of the radial line where the magnet slot 506 is located is smaller than the radius of the radial line where the pin hole 504 and the heat dissipation hole 505 are located. Several rotor laminations 503 are stacked to form a rotor 5, and the rotor 5 is fixed by inserting pins into several corresponding pin holes 504; The magnet slots 506 on the rotor laminations 503 are coaxially stacked to form a passage and are embedded with the main magnets 502. The shaft 501 is interference-fitted inside the shaft hole 507. The left end bearing of the shaft 501 is connected to the rear end cover 2, and the right end bearing of the shaft 501 is connected to the front end cover 4. The rear end cover 2 and the front end cover 4 are connected to the housing 3 by bolts. The stator 6 is fixed inside the housing 3, and the rotor 5 is located inside the stator 6 and on the same axis.
[0014] Working principle: A certain number of rotor laminations 503 are coaxially stacked along the axial direction and fastened with pins to form the iron core of rotor 5. Then, the main magnets 502 are sequentially embedded into the magnet slots 506 according to the polarity requirements, and finally assembled into rotor 5. Rotor 5 is then installed inside the stator 6 of motor 1, and the encoder, bearings, and other components are installed, thus forming a high-performance motor 1. Due to the completely symmetrical structure of rotor 5, the rotor 5 formed by its stacking has a natural mass balance, which is easy to perform dynamic balancing correction. This ensures the smoothness of motor 1 during high-speed operation, effectively reduces vibration and noise, ensures extremely low torque pulsation, achieves smooth torque output, and further improves the performance of motor 1.
[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0016] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A rotor lamination, characterized in that: The rotor lamination (503) is in the shape of a disc. Several magnetic slots (506) are formed on the surface of the rotor lamination (503). A shaft hole (507) is formed in the center of the rotor lamination (503). The magnetic slots (506) are rectangular and arranged at equal intervals around the axis of the rotor lamination (503). The number of magnetic slots (506) is even. A pin hole (504) and a heat dissipation hole (505) are formed on the surface of the rotor lamination (503). The cross-section of the heat dissipation hole (505) is composed of an isosceles triangle and a rectangle. The radius of the line where the magnetic slot (506) is located is smaller than the radius of the line where the pin hole (504) and the heat dissipation hole (505) are located.
2. A rotor lamination according to claim 1, characterized in that: The length of the magnet slot (506) is half the radius of the rotor lamination (503). The radial position of the magnet slot (506) is far from the axis of the rotor lamination (503). The apex of the isosceles triangle faces the pin hole (504) and is on the same radial line as the midpoint of the pin hole (504). The pin hole (504) and the heat dissipation hole (505) are arranged along the radial line of the rotor lamination (503) and are located between the two magnet slots (506). The rotor lamination (503) is axially symmetrical.
3. A motor rotor, characterized in that: The rotor (5) includes the rotor lamination (503) as described in claim 1, wherein a plurality of rotor laminations (503) are stacked to form a rotor (5), the rotor (5) is fixed by inserting pins into a plurality of corresponding pin holes (504), the magnet slots (506) on the rotor laminations (503) are coaxially stacked to form a passage and are fitted with main magnets (502), and the shaft hole (507) is interference-fitted with a rotating shaft (501).
4. An electric motor, characterized in that: Includes the rotor (5) as described in claim 3.
5. The motor according to claim 4, characterized in that: The left end bearing of the rotating shaft (501) is connected to the rear end cover (2), the right end bearing of the rotating shaft (501) is connected to the front end cover (4), the rear end cover (2) and the front end cover (4) are connected to the housing (3) by bolts, the housing (3) has a stator (6) fixed inside, and the rotor (5) is located inside the stator (6) and on the same axis.