Plastic magnetic rotor shaft core structure
By designing a plastic magnetic rotor shaft core structure and employing threaded connections of mounting sleeves and top retainers, along with locking methods using pins and snap screws, the problem of eddy current effects in alternating magnetic fields in metal rotor shaft cores is solved. This achieves stable connection and efficient transmission, improving the motor's operating efficiency and response speed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HAYASHI PLASTIC MAGNET TECH(KUNSHAN) LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-07-10
AI Technical Summary
In existing technologies, the metal rotor shaft generates eddy currents in an alternating magnetic field, leading to energy loss and temperature rise, which affects motor efficiency and dynamic performance. Furthermore, the high-density metal material increases rotational inertia and reduces equipment response speed.
It adopts a plastic magnetic rotor shaft structure, and achieves stable installation and labor-saving adjustment through the threaded connection of the mounting sleeve and the top fixing device, and the design of the auxiliary rotation ear; the auxiliary rotation of the top cap is locked by the connection of the pin and the snap screw, which improves the connection stability and transmission efficiency.
It improves the connection stability and convenience of the rotor shaft core, reduces energy loss, and enhances the operating efficiency and response speed of the equipment.
Smart Images
Figure CN224481532U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotor shaft technology, and in particular to a plastic magnetic rotor shaft structure. Background Technology
[0002] In the fields of permanent magnet motors, micro motors, and precision transmission equipment, the rotor shaft is a key component for transmitting torque and supporting rotational motion, and its performance directly affects the operating efficiency and service life of the equipment. Traditional metal rotor shafts, during long-term use, generate significant eddy current effects in alternating magnetic fields, leading to increased energy loss and temperature rise, thus affecting motor efficiency. High-density metal materials increase the rotational inertia of rotating components, restricting the improvement of equipment response speed and dynamic performance. Conductive metal materials may adversely affect the magnetic field distribution of permanent magnets, reducing electromagnetic conversion efficiency. Therefore, we have redesigned a plastic magnetic rotor shaft structure. Utility Model Content
[0003] The purpose of this invention is to provide a plastic magnetic rotor shaft core structure.
[0004] To solve the above technical problems, this utility model provides the following technical solution: a plastic magnetic rotor shaft core structure, including a rotor shaft core, a fastening thread provided on one side surface of the rotor shaft core, a mounting sleeve post detachably mounted on one side surface of the rotor shaft core, a rotor core fixedly connected to one side surface of the mounting sleeve post, a magnet detachably mounted on one side surface of the rotor shaft core, a top retainer detachably mounted on the rotor shaft core near the fastening thread, a threaded locking groove provided inside one side of the top retainer, a connecting arm fixedly connected to one side surface of the top retainer, an auxiliary rotating ear fixedly connected to one side top of the connecting arm, and an auxiliary groove provided on one side surface of the auxiliary rotating ear.
[0005] Preferably, the cross-sectional diameter of the mounting sleeve is larger than the cross-sectional diameter of the rotor shaft core, the connection between the mounting sleeve and the rotor shaft core is a movable sleeve, the connection between the magnet and the rotor core is a movable snap-fit, the connection between the top fixing device and the fastening thread is a threaded connection, and the number of auxiliary rotating ears is two, with the two auxiliary rotating ears symmetrically distributed on the outer wall surfaces of both sides of the top fixing device.
[0006] Preferably, a pin mounting hole is provided inside one side of the rotor shaft core, and a mounting connecting shaft is detachably installed inside the pin mounting hole. A rotating connecting gear is fixedly connected to one side of the mounting connecting shaft.
[0007] Preferably, a first mating hole is provided on one side surface of the mounting connecting shaft, and a second mating hole is provided inside one side of the rotor shaft core. A snap-fit screw is detachably installed inside the second mating hole, and a limit top groove is provided on the top surface of the rotor shaft core near the second mating hole.
[0008] Preferably, a locking cap is detachably installed inside the limiting top groove, the locking cap has a screw connection groove inside, a connecting rod is fixedly connected to the top of the back of the locking cap, and a rotating auxiliary disk is fixedly connected to the top of one side of the connecting rod.
[0009] Preferably, the connection between the pin mounting hole and the mounting connecting shaft is a pin connection; the positions of the first mating hole and the second mating hole correspond one-to-one; the second mating hole penetrates the interior of the rotor shaft core; the second mating hole communicates with the limiting top groove; the cross-sectional diameters of the first mating hole and the second mating hole are the same; the connection between the snap screw and the second mating hole is a pin connection; the connection between the snap screw and the first mating hole is a pin connection; the connection between the snap screw and the locking top device is a threaded connection; and the connection between the limiting top groove and the locking top device is a movable snap-fit.
[0010] Compared with related technologies, the plastic magnetic rotor shaft core structure provided by this utility model has the following beneficial effects:
[0011] 1. This utility model provides a plastic magnetic rotor shaft core structure. It is directly mounted onto the rotor shaft core via mounting sleeves. A threaded connection is achieved between the threaded locking groove on the top retainer and the fastening thread. The installation of top retainers on both sides provides resistance and fixation to the top ends of the mounting sleeves, ensuring stable installation between the rotor shaft core and the mounting sleeves. A magnet is directly snapped onto one side of the rotor core surface. The rotation of the top retainer can be assisted by the auxiliary rotating lug on the connecting arm. This not only ensures the stability of the connection between the top retainer and the fastening thread but also achieves effortless adjustment, improving the convenience of connecting and using the device.
[0012] 2. This utility model provides a plastic magnetic rotor shaft core structure. By setting the connection between the rotor shaft core and the rotating connecting gear, the connecting shaft is directly inserted into the pin mounting hole, and then the snap screw passes directly through the second and first mating holes. A locking cap is directly installed on one side of the snap screw. The locking operation of the snap screw is achieved through a threaded connection. The rotation of the locking cap is assisted by a connecting rod. The rotation adjustment of the locking cap on the snap screw can directly extend into the limiting top groove to complete further sealing and snapping, improving the connection stability between the rotor shaft core and the rotating connecting gear. The rotating connecting gear directly meshes with other gears to achieve transmission. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0014] Figure 2 This is a schematic diagram of the disassembled side top view of the rotating connecting gear and rotor shaft of this utility model;
[0015] Figure 3 This is a schematic diagram of the disassembled side view of the rotating connecting gear and rotor shaft of this utility model;
[0016] Figure 4 This is a schematic diagram of the locking capping device of this utility model.
[0017] The following are the labeling elements in the diagram: 1. Rotor shaft; 2. Fastening thread; 3. Mounting sleeve; 4. Rotor core; 5. Magnet; 6. Top retainer; 7. Threaded locking groove; 8. Connecting arm; 9. Auxiliary rotating lug; 10. Auxiliary groove; 11. Pin mounting hole; 12. Mounting connecting shaft; 13. Rotating connecting gear; 14. First mating hole; 15. Second mating hole; 16. Snap-on screw; 17. Limiting top groove; 18. Locking top cap; 19. Screw connecting groove; 20. Connecting rod; 21. Rotating auxiliary disk. Detailed Implementation
[0018] Example 1:
[0019] Please see Figure 1-4This utility model provides a technical solution: a plastic magnetic rotor shaft core structure, including a rotor shaft core 1, a fastening thread 2 on one side surface of the rotor shaft core 1, a mounting sleeve 3 detachably mounted on one side surface of the rotor shaft core 1, a rotor core 4 fixedly connected to one side surface of the mounting sleeve 3, a magnet 5 detachably mounted on one side surface of the rotor core 4, a top retainer 6 detachably mounted near the fastening thread 2 on the rotor shaft core 1, a threaded locking groove 7 opened inside one side of the top retainer 6, a connecting arm 8 fixedly connected to one side surface of the top retainer 6, an auxiliary rotating ear 9 fixedly connected to the top of one side of the connecting arm 8, an auxiliary groove 10 opened on one side surface of the auxiliary rotating ear 9, the cross-sectional diameter of the mounting sleeve 3 is larger than the cross-sectional diameter of the rotor shaft core 1, the connection relationship between the mounting sleeve 3 and the rotor shaft core 1 is a movable sleeve, the connection relationship between the magnet 5 and the rotor core 4 is a movable snap-fit, the connection relationship between the top retainer 6 and the fastening thread 2 is a threaded connection, and the number of auxiliary rotating ears 9 is two, the two auxiliary rotating ears 9 are symmetrically distributed on the outer wall surfaces of both sides of the top retainer 6.
[0020] In the implementation plan, the mounting sleeve 3 is directly sleeved onto the rotor shaft core 1, and the threaded connection between the threaded locking groove 7 on the top retainer 6 and the fastening thread 2 is achieved directly. With the top retainers 6 installed on both sides, the top ends of the mounting sleeve 3 are fixed against force, thus completing the stable installation between the rotor shaft core 1 and the mounting sleeve 3. A magnet 5 is directly snapped onto one side surface of the rotor core 4. The rotation of the top retainer 6 can be assisted by the auxiliary rotating lug 9 on the connecting arm 8. This not only ensures the stability of the connection between the top retainer 6 and the fastening thread 2, but also achieves the effect of labor-saving adjustment, improving the convenience of connecting and using the device.
[0021] Example 2:
[0022] Please see Figure 1-4This utility model provides a technical solution: a plastic magnetic rotor shaft core structure, including a pin mounting hole 11 inside one side of the rotor shaft core 1, a mounting connecting shaft 12 detachably installed inside the pin mounting hole 11, a rotating connecting gear 13 fixedly connected to one side of the mounting connecting shaft 12, a first mating hole 14 on one side of the mounting connecting shaft 12, a second mating hole 15 inside one side of the rotor shaft core 1, a snap-fit screw 16 detachably installed inside the second mating hole 15, a limiting top groove 17 on the top surface of the rotor shaft core 1 near the second mating hole 15, a locking top device 18 detachably installed inside the limiting top groove 17, and a screw connecting groove 19 inside the locking top device 18. A connecting rod 20 is fixedly connected to the top of the back of 18. A rotating auxiliary disk 21 is fixedly connected to the top of one side of the connecting rod 20. The connection relationship between the pin mounting hole 11 and the mounting connecting shaft 12 is a pin connection. The positions of the first mating hole 14 and the second mating hole 15 correspond one-to-one. The second mating hole 15 penetrates the interior of the rotor shaft core 1. The second mating hole 15 is connected to the limiting top groove 17. The cross-sectional diameters of the first mating hole 14 and the second mating hole 15 are the same. The connection relationship between the snap screw 16 and the second mating hole 15 is a pin connection. The connection relationship between the snap screw 16 and the first mating hole 14 is a pin connection. The connection relationship between the snap screw 16 and the locking top device 18 is a threaded connection. The connection relationship between the limiting top groove 17 and the locking top device 18 is a movable snap-fit.
[0023] In the implementation scheme, by setting the connection between the rotor shaft core 1 and the rotating connecting gear 13, the connecting shaft 12 is directly inserted into the pin mounting hole 11, and the snap screw 16 passes directly through the second docking hole 15 and the first docking hole 14. A locking cap 18 is directly installed on one side of the top of the snap screw 16. The locking operation of the snap screw 16 is performed by threaded connection. The rotation of the locking cap 18 is assisted by the connecting rod 20. The rotation adjustment of the locking cap 18 on the snap screw 16 can directly extend into the limit top groove 17 to complete further sealing and snapping, thereby improving the connection stability between the rotor shaft core 1 and the rotating connecting gear 13. The rotating connecting gear 13 directly meshes with other gears to realize transmission.
[0024] Working principle:
[0025] The mounting sleeve 3 is directly sleeved onto the rotor shaft 1. The threaded locking groove 7 on the top retainer 6 is directly threaded into the fastening thread 2. With the top retainers 6 installed on both sides, the top ends of the mounting sleeve 3 are fixed against the force, thus completing the stable installation between the rotor shaft 1 and the mounting sleeve 3. A magnet 5 is directly snapped onto one side of the rotor core 4. The rotation of the top retainer 6 can be assisted by the auxiliary rotating lug 9 on the connecting arm 8. This not only ensures the stability of the connection between the top retainer 6 and the fastening thread 2, but also achieves the effect of labor-saving adjustment, improving the convenience of the device connection and use.
[0026] By setting the connection between the rotor shaft 1 and the rotating connecting gear 13, the connecting shaft 12 is directly inserted into the pin mounting hole 11, and the snap screw 16 passes directly through the second docking hole 15 and the first docking hole 14. A locking cap 18 is directly installed on one side of the top of the snap screw 16. The locking operation of the snap screw 16 is performed by threaded connection. The rotation of the locking cap 18 is assisted by the connecting rod 20. The rotation adjustment of the locking cap 18 on the snap screw 16 can directly extend into the limit top groove 17 to complete further sealing and snapping, thereby improving the connection stability between the rotor shaft 1 and the rotating connecting gear 13. The rotating connecting gear 13 directly meshes with other gears to realize transmission.
Claims
1. A plastic magnetic rotor core structure, comprising a rotor core (1), wherein a fastening thread (2) is provided on one side surface of the rotor core (1), characterized in that: A mounting sleeve (3) is detachably mounted on one side surface of the rotor shaft core (1). A rotor core (4) is fixedly connected to one side surface of the mounting sleeve (3). A magnet (5) is detachably mounted on one side surface of the rotor core (4). A top retainer (6) is detachably mounted on the rotor shaft core (1) near the fastening thread (2). A threaded locking groove (7) is provided inside one side of the top retainer (6). A connecting arm (8) is fixedly connected to one side surface of the top retainer (6). An auxiliary rotating ear (9) is fixedly connected to the top of one side of the connecting arm (8). An auxiliary groove (10) is provided on one side surface of the auxiliary rotating ear (9).
2. The plastic magnetic rotor core structure according to claim 1, characterized in that, The cross-sectional diameter of the mounting sleeve (3) is larger than that of the rotor shaft core (1). The mounting sleeve (3) and the rotor shaft core (1) are connected by a movable sleeve. The magnet (5) and the rotor core (4) are connected by a movable snap-fit. The top fixing device (6) and the fastening thread (2) are connected by a threaded connection. There are two auxiliary rotating ears (9). The two auxiliary rotating ears (9) are symmetrically distributed on the outer wall surfaces of both sides of the top fixing device (6).
3. The plastic magnetic rotor shaft core structure according to claim 1, characterized in that, The rotor shaft (1) has a pin mounting hole (11) inside one side top end. A mounting connecting shaft (12) is detachably installed inside the pin mounting hole (11). A rotating connecting gear (13) is fixedly connected to one side top end of the mounting connecting shaft (12).
4. The plastic magnetic rotor shaft core structure according to claim 3, characterized in that, The mounting connecting shaft (12) has a first mating hole (14) on one side surface, and the rotor shaft core (1) has a second mating hole (15) inside one side. The second mating hole (15) is detachably fitted with a snap screw (16). The rotor shaft core (1) has a limit top groove (17) on the top surface of the side near the second mating hole (15).
5. The plastic magnetic rotor shaft core structure according to claim 4, characterized in that, The limiting top groove (17) is detachably installed with a locking top device (18). The locking top device (18) has a screw connection groove (19) inside. A connecting rod (20) is fixedly connected to the top of the back of the locking top device (18). A rotating auxiliary disk (21) is fixedly connected to the top of one side of the connecting rod (20).
6. The plastic magnetic rotor shaft core structure according to claim 5, characterized in that, The connection between the pin mounting hole (11) and the mounting connecting shaft (12) is a pin connection. The positions of the first docking hole (14) and the second docking hole (15) correspond one-to-one. The second docking hole (15) penetrates the interior of the rotor shaft core (1). The second docking hole (15) is connected to the limiting top groove (17). The cross-sectional diameters of the first docking hole (14) and the second docking hole (15) are the same. The connection between the snap screw (16) and the second docking hole (15) is a pin connection. The connection between the snap screw (16) and the first docking hole (14) is a pin connection. The connection between the snap screw (16) and the locking top device (18) is a threaded connection. The connection between the limiting top groove (17) and the locking top device (18) is a movable snap-fit connection.