Low-speed large-torque rotor structure
By designing a low-speed, high-torque rotor structure including reinforcement ribs, tie rod bolts and permanent magnets, the problem of connection shaft deformation and vibration during low-speed, high-torque output is solved, and the safety and stability of motor operation is improved.
Patent Information
- Application Number
- CN202421568219.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-04
AI Technical Summary
During the low-speed and high-torque output, the motor is prone to deformation and vibration problems of the connection shaft, which affects the service life and operating stability of the motor.
A low-speed and high-torque rotor structure is designed, including connecting shaft, reinforcement ribs, tie rod bolts, rotor punching plates, rotor end plates, tie rod nuts and permanent magnets. By welding reinforcement ribs on the circumference of the connecting shaft and providing bolt holes and rivet holes on the rotor punching plate and the rotor end plate, the rotor punching plate and the rotor end plate are tightened by pull rod bolts and pull rod nuts to enhance the support stiffness of the rotor superposition.
It effectively prevents deformation of the connecting shaft, improves the operating safety and stability of the motor, and reduces vibration during the motor operation.
Smart Images
Figure CN222763668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a low-speed and high-torque rotor structure. Background Art
[0002] The motor has to output a large torque during operation. In addition to the weight of the motor rotor and the requirement for low-speed operation, the vibration problem during the operation of the motor and the deformation problem of the connecting shaft are two important issues related to the service life of the motor. Therefore, a reasonable motor structure must be designed. Summary of the invention
[0003] In view of the deficiencies in the prior art, the embodiment of the utility model provides a low-speed high-torque rotor structure, which can prevent the deformation of the connecting shaft, improve the safety of the motor operation, and reduce the vibration during operation. To achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:
[0004] The utility model embodiment provides a low-speed high-torque rotor structure, including a connecting shaft, reinforcing ribs, tie rod bolts, rotor punchings, rotor end plates, tie rod nuts, and permanent magnets;
[0005] A plurality of reinforcing ribs are welded on the circumference of the connecting shaft, and the plurality of reinforcing ribs are evenly distributed around the circumference of the connecting shaft; a plurality of rotor punchings are stacked axially along the connecting shaft to form a rotor stacking body, and rotor end plates are provided at both ends of the rotor stacking body; the rotor stacking body and the rotor end plates are sleeved together on the reinforcing ribs of the connecting shaft; bolt holes are provided on the rotor punchings and the rotor end plates, and the bolt holes on the rotor punchings and the rotor end plates are passed through by tie rod bolts, and the rotor punchings and the rotor end plates are fastened by connecting the tie rod nuts with the tie rod bolts; the rotor punchings and the rotor end plates are tightly matched with the tops of the reinforcing ribs;
[0006] A magnet slot is provided on each rotor punching sheet, and a permanent magnet is arranged in the magnet slot.
[0007] Furthermore, rivet holes are provided on the rotor punching sheets, and a plurality of rivet holes are evenly distributed on an inner circle and an outer circle of the rotor punching sheets; and a plurality of rotor punching sheets are stacked by rivets passing through the rivet holes on the rotor punching sheets.
[0008] Furthermore, the bolt holes are evenly distributed on the rotor punching sheets and are located on the inner circle where the rivet holes are located, and are spaced apart from the rivet holes.
[0009] Furthermore, the inner ring of the rotor punching is provided with a keyway, and one of the reinforcing ribs is also provided with a keyway, and the keyways of each rotor punching and the keyways on the reinforcing rib are arranged opposite to each other and matched by keys.
[0010] Furthermore, the rotor end plate is made of aluminum alloy material.
[0011] Furthermore, weight-reducing holes are provided on the rotor punching sheet; a plurality of weight-reducing holes are evenly distributed on an intermediate circle between the inner circle and the outer circle where the rivet holes are located.
[0012] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:
[0013] 1) It can increase the supporting stiffness of the connecting shaft to the rotor superposition body, reduce the deflection of the connecting shaft, prevent the deformation of the connecting shaft, and improve the safety of the motor operation.
[0014] 2) Can ensure the stability of motor operation.
[0015] 3) Can reduce the vibration during motor operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the rotor structure in an embodiment of the utility model.
[0017] Figure 2 It is a cross-sectional view of the rotor structure in an embodiment of the utility model. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0019] like Figure 1 and Figure 2 As shown, a low-speed high-torque rotor structure proposed in an embodiment of the utility model includes a connecting shaft 1, a reinforcing rib 2, a tie rod bolt 3, a rotor punching 4, a rotor end plate 5, a tie rod nut 6, and a permanent magnet 7;
[0020] A plurality of reinforcing ribs 2 are welded on the circumference of the connecting shaft 1, and the plurality of reinforcing ribs 2 are evenly distributed around the circumference of the connecting shaft 1; a plurality of rotor punchings 4 are stacked axially along the connecting shaft 1 to form a rotor stacking body, and rotor end plates 5 are provided at both ends of the rotor stacking body; the rotor stacking body and the rotor end plates 5 are sleeved together on the reinforcing ribs 2 of the connecting shaft 1; bolt holes 10 are provided on the rotor punchings 4 and the rotor end plates 5, and the bolt holes 10 on the rotor punchings 4 and the rotor end plates 5 are passed through by tie rod bolts 3, and the rotor punchings 4 and the rotor end plates 5 are fastened by connecting the tie rod nuts 6 with the tie rod bolts 3; the rotor punchings 4 and the rotor end plates 5 are tightly matched with the tops of the reinforcing ribs 2;
[0021] A magnet slot is provided on each rotor punching 4, and a permanent magnet 7 is arranged in the magnet slot;
[0022] By arranging reinforcing ribs 2 on the connecting shaft 1, for large motors, the supporting stiffness of the connecting shaft on the rotor stack can be increased, the deflection of the connecting shaft can be reduced, deformation of the connecting shaft can be prevented, and the safety of the motor operation can be improved; the rotor punching 4 and the rotor end plate 5 are tightened and fixed by the tie rod bolts 3 and the tie rod nuts 6, so that the rotor punching 4 will not collapse due to the displacement of the rotor end plate 5 during the operation of the motor, thereby improving the stability of the motor operation.
[0023] Furthermore, rivet holes 8 are provided on the rotor punching 4, and multiple rivet holes 8 are evenly distributed on an inner circle and an outer circle of the rotor punching 4; multiple rotor punchings 4 are stacked by rivets passing through the rivet holes 8 on the rotor punching 4; the rotor punchings 4 can be stacked firmly without circumferential displacement.
[0024] Furthermore, the bolt holes 10 are evenly distributed on the rotor punching sheet 4 and are located on the inner circle where the rivet holes 8 are located, and are spaced apart from the rivet holes 8 ; thus, the stability of the motor operation can be ensured.
[0025] Furthermore, the inner ring of the rotor punching sheet 4 is provided with a keyway (not shown in the figure), and a keyway is also provided on one of the reinforcing ribs 2. The keyways of each rotor punching sheet 4 and the keyways on the reinforcing rib 2 are arranged opposite to each other and matched by keys, so that the rotor stack can withstand a larger torque.
[0026] Furthermore, the rotor end plate 5 is made of aluminum alloy, which can prevent the permanent magnet 7 from being repelled from the rotor punching 4 due to magnetic force, and can also isolate magnetic field to prevent magnetic leakage from causing uneven magnetic field and vibration.
[0027] Furthermore, weight-reducing holes 9 are provided on the rotor punching sheet 4; a plurality of weight-reducing holes 9 are evenly distributed on an intermediate circle between the inner circle and the outer circle where the rivet holes 8 are located; the weight-reducing holes can effectively reduce the weight of the rotor stack itself, on the one hand reducing the force of the rotor stack acting on the connecting shaft, and on the other hand reducing the rotational inertia of the motor. The reduction in the rotational inertia can effectively prevent the mechanical vibration of the motor caused by the large inertia force, and reduce the energy consumption of the motor.
[0028] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A low-speed, high-torque rotor structure, characterized in that: It comprises a connecting shaft (1), a reinforcing rib (2), a tie rod bolt (3), a rotor punching sheet (4), a rotor end plate (5), a tie rod nut (6), and a permanent magnet (7); A plurality of reinforcing ribs (2) are welded on the circumference of the connecting shaft (1), and the plurality of reinforcing ribs (2) are evenly distributed around the circumference of the connecting shaft (1); a plurality of rotor punchings (4) are stacked axially along the connecting shaft (1) to form a rotor stack, and rotor end plates (5) are provided at both ends of the rotor stack; the rotor stack and the rotor end plates (5) are sleeved together on the reinforcing ribs (2) of the connecting shaft (1); bolt holes (10) are provided on the rotor punchings (4) and the rotor end plates (5), and the bolt holes (10) on the rotor punchings (4) and the rotor end plates (5) are passed through by tie rod bolts (3), and the rotor punchings (4) and the rotor end plates (5) are fastened by connecting the tie rod nuts (6) to the tie rod bolts (3); the rotor punchings (4) and the rotor end plates (5) are tightly matched with the tops of the reinforcing ribs (2); A magnet slot is provided on each rotor punching sheet (4), and a permanent magnet (7) is arranged in the magnet slot.
2. The low-speed, high-torque rotor structure according to claim 1, characterized in that: Rivet holes (8) are provided on the rotor punching sheet (4), and a plurality of rivet holes (8) are evenly distributed on an inner circle and an outer circle of the rotor punching sheet (4); and a plurality of rotor punching sheets (4) are stacked by rivets passing through the rivet holes (8) on the rotor punching sheets (4).
3. The low-speed, high-torque rotor structure according to claim 1, characterized in that: The bolt holes (10) are evenly distributed on the rotor punching sheet (4), and are located on the inner circle where the rivet holes (8) are located, and are spaced apart from the rivet holes (8).
4. The low-speed, high-torque rotor structure according to claim 1, characterized in that: The inner ring of the rotor punch (4) is provided with a keyway, and one of the reinforcing ribs (2) is also provided with a keyway. The keyways of each rotor punch (4) and the keyways on the reinforcing rib (2) are arranged opposite to each other and are matched by a key.
5. The low-speed, high-torque rotor structure according to claim 1, characterized in that: The rotor end plate (5) is made of aluminum alloy material.
6. The low speed and high torque rotor structure according to claim 1, characterized in that: Weight-reducing holes (9) are provided on the rotor punching sheet (4); a plurality of weight-reducing holes (9) are evenly distributed on an intermediate circle between the inner circle and the outer circle where the rivet holes (8) are located.