A two-stage gear transmission permanent magnet lifter
Patent Information
- Application Number
- CN202522447361.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-11-18
AI Technical Summary
[0003]在现有技术中,永磁起重器在工作时,大多通过操控装置来改变其内部的磁路状态,而传统的永磁起重器通常在操作过程中依赖人工手动来切换磁路,人工控制容易导致磁铁位置偏差,使永磁起重器磁力相加或相抵不彻底,从而导致吸附重物不稳,造成重物滑落,进而使重物表面受到划损,且同时增大重物滑落引发的安全隐患
[0014]This invention begins with a demagnetized state. The long rod rises, causing the connecting rod to rotate. This causes the hollow ring block and the second magnet to rotate 180° with the connecting rod. The first and second magnets then magnetize each other, reaching a fully magnetic state, thus attracting weights. The long rod then falls and rises again, causing the connecting rod to rotate the hollow ring block and the second magnet another 180°. At this point, the first and second magnets magnetically cancel each other out, and the demagnetized state is no longer visible, releasing the weight. The long rod then rises again, causing the first and second magnets to magnetize each other once more, reaching a fully magnetic state. By attaching a heavy object and cycling through the process of raising the rod from non-magnetic to fully magnetized, then lowering it back to non-magnetic, and then raising it again to fully magnetized, manual adjustment of the magnetic force can be eliminated. This improves the practicality and effectiveness of traditional permanent magnet lifters. It also solves the problem that traditional permanent magnet lifters usually rely on manual switching of the magnetic circuit during operation. Manual control can easily lead to magnet position deviation, resulting in incomplete addition or cancellation of the magnetic force of the permanent magnet lifter. This can cause the load to slip, resulting in scratches on the surface of the load and increasing the safety hazards caused by the slipping load.
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Figure CN224768260U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of permanent magnet lifters, specifically a two-stage gear-driven permanent magnet lifter. Background Technology
[0002] Permanent magnet lifters, also known as permanent magnet chucks, magnetic lifters, magnetic hoists, or lifting permanent magnets, are power-free lifting devices designed based on high-performance neodymium iron boron permanent magnet materials. Their core principle is to change the magnetic circuit state by rotating the handle or using electric control to achieve the adsorption and release of workpieces. They are characterized by their small size, light weight, and strong holding force. They are suitable for transferring high-frequency workpieces in machining, ensuring operational safety and zero damage to the workpiece surface. They are widely used in the entire chain of heavy industry and light manufacturing and are an indispensable key lifting tool in modern industry.
[0003] In existing technologies, permanent magnet lifters are mostly operated by changing the internal magnetic circuit state through a control device. Traditional permanent magnet lifters usually rely on manual switching of the magnetic circuit during operation. Manual control can easily lead to magnet position deviation, resulting in incomplete addition or cancellation of the magnetic forces of the permanent magnet lifter. This can cause the load to be unstable, slip, and fall, which can scratch the surface of the load and increase the safety hazards caused by the load slipping. Utility Model Content
[0004] To overcome the shortcomings of existing technologies, traditional permanent magnet lifters typically rely on manual switching of the magnetic circuit during operation. Manual control can easily lead to magnet position deviation, resulting in incomplete addition or cancellation of the magnetic forces of the permanent magnet lifter. This causes the load to be unstable, slip, and fall, which can scratch the surface of the load and increase the safety hazards caused by the slippage. This utility model proposes a permanent magnet lifter with a two-stage gear transmission.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a permanent magnet lifter with double-stage gear transmission, including a mounting shell, a magnetic guide plate is fixedly connected to the inner cavity of the mounting shell, a plurality of magnetic guide plates are provided, a first magnet block is provided on one side of each of the two magnetic guide plates, and a transmission mechanism is provided in the inner cavity of the mounting shell.
[0006] The transmission mechanism includes a fixed block, one side of which is fixedly connected to the inner cavity of the mounting shell. A long rod is slidably connected to the inner cavity of the fixed block. A connecting block is fixedly connected to one side of the long rod. A rack is fixedly connected to one side of the connecting block. A fixed frame is fixedly connected to one side of the magnetic plate. Two fixed frames are provided. A round rod is rotatably connected to the inner cavity of the fixed frame. A first gear is provided on the surface of one of the round rods. The teeth of the first gear mesh with the teeth of the rack. A second gear is fixedly connected to the surface of the round rod. A connecting rod is rotatably connected to the inner cavity of the magnetic plate. A third gear is fixedly connected to the surface of the connecting rod. The teeth of the third gear mesh with the teeth of the second gear. Several hollow ring blocks are fixedly connected to the surface of the connecting rod. A second magnet block is fixedly connected to the inner cavity of the hollow ring block. An auxiliary mechanism is provided in the inner cavity of the first gear.
[0007] Preferably, the auxiliary mechanism includes a ratchet located inside the first gear. One side of the ratchet is fixedly connected to one side of a round rod. The surface of the first gear has a mounting groove, and the inner cavity of the mounting groove is provided with a pawl. One side of the ratchet is fixedly connected to a first bearing, and the outer ring of the first bearing is fixedly connected to the inner cavity of the first gear. One side of the pawl is fixedly connected to a spring, and one side of the spring is fixedly connected to the inner cavity of the first gear.
[0008] Preferably, a support plate is fixedly connected to one side of the magnetic plate, and a groove is formed on the surface of the support plate. One side of the rack is slidably connected to the inner cavity of the groove.
[0009] Preferably, a second bearing is fixedly connected to the inner cavity of the fixing frame, and the inner ring of the second bearing is fixedly connected to the surface of the round rod.
[0010] Preferably, the surface of the long rod is provided with a circular groove, and a dustproof ring block is fixedly connected to the surface of the long rod.
[0011] Preferably, a reinforcing plate is fixedly connected inside the mounting shell, and a connecting post is fixedly connected inside the cavity of the reinforcing plate. Several connecting posts are provided, and one side of each connecting post is fixedly connected to one side of the magnetic conductive plate.
[0012] Preferably, the surface of the magnetic plate is provided with a hollow groove, and a one-way bearing is rotatably connected to the inner cavity of the hollow groove. The inner cavity of the one-way bearing is fixedly connected to the surface of the connecting rod.
[0013] The advantages of this utility model are:
[0014] This invention begins with a demagnetized state. The long rod rises, causing the connecting rod to rotate. This causes the hollow ring block and the second magnet to rotate 180° with the connecting rod. The first and second magnets then magnetize each other, reaching a fully magnetic state, thus attracting weights. The long rod then falls and rises again, causing the connecting rod to rotate the hollow ring block and the second magnet another 180°. At this point, the first and second magnets magnetically cancel each other out, and the demagnetized state is no longer visible, releasing the weight. The long rod then rises again, causing the first and second magnets to magnetize each other once more, reaching a fully magnetic state. By attaching a heavy object and cycling through the process of raising the rod from non-magnetic to fully magnetized, then lowering it back to non-magnetic, and then raising it again to fully magnetized, manual adjustment of the magnetic force can be eliminated. This improves the practicality and effectiveness of traditional permanent magnet lifters. It also solves the problem that traditional permanent magnet lifters usually rely on manual switching of the magnetic circuit during operation. Manual control can easily lead to magnet position deviation, resulting in incomplete addition or cancellation of the magnetic force of the permanent magnet lifter. This can cause the load to slip, resulting in scratches on the surface of the load and increasing the safety hazards caused by the slipping load. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a three-dimensional schematic diagram of the overall equipment of this utility model;
[0017] Figure 2 This is a cross-sectional schematic diagram of the mounting shell of this utility model;
[0018] Figure 3 This is a three-dimensional schematic diagram of the first magnet block of this utility model;
[0019] Figure 4 This is a three-dimensional schematic diagram of the rack of this utility model;
[0020] Figure 5 This is a cross-sectional schematic diagram of the round rod of this utility model;
[0021] Figure 6 This is a cross-sectional view of the connecting rod of this utility model;
[0022] Figure 7 This is a three-dimensional schematic diagram of the ratchet of this utility model.
[0023] In the diagram: 1. Mounting shell; 2. Magnetic plate; 3. Transmission mechanism; 301. Fixing block; 302. Long rod; 303. Connecting block; 304. Rack; 305. Fixing frame; 306. Round rod; 307. First gear; 308. Second gear; 309. Connecting rod; 310. Third gear; 311. Hollow ring block; 312. Second magnet block; 4. Auxiliary mechanism; 401. Ratchet; 402. Mounting groove; 403. Pawl; 404. First bearing; 405. Spring; 5. First magnet block; 6. Support plate; 7. Slide groove; 8. Second bearing; 9. Round groove; 10. Dustproof ring block; 11. Reinforcing plate; 12. Connecting column; 13. Hollow groove; 14. One-way bearing. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0025] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.
[0026] This application discloses a permanent magnet lifter with a two-stage gear transmission. (Refer to...) Figure 1-7 A permanent magnet lifter with a two-stage gear transmission includes a mounting shell 1. A magnetic guide plate 2 is fixedly connected to the inner cavity of the mounting shell 1. Several magnetic guide plates 2 are arranged, and a first magnet block 5 is arranged on one side of each of the two magnetic guide plates 2. A transmission mechanism 3 is arranged inside the inner cavity of the mounting shell 1. The mounting shell 1 can be used to install the magnetic guide plates 2, the first magnet blocks 5, and the transmission mechanism 3, thereby supporting and fixing them. Multiple magnetic guide plates 2 are arranged inside the mounting shell 1. The first magnet blocks 5 can transmit magnetic force by being installed. Multiple first magnet blocks 5 are arranged and installed in the middle of two magnetic guide plates 2 respectively. The two magnets are located on both sides of the second magnet block 312, with their magnetic directions opposite each other. They can be used in conjunction with the second magnet block 312 to assist in the hoisting of heavy objects. The transmission mechanism 3 is located inside the mounting shell 1. It can cooperate with hoisting equipment to hoist and transfer heavy objects of a certain weight. At the same time, by pulling its internal components during the hoisting process, it can drive the internal double-pole gear assembly to control the position of the magnet, so that the magnet extends downward and the magnetic force is added to attract the heavy object. This allows the magnetic force to be changed during the hoisting process to hoist and transfer the heavy object, thereby improving the practicality of the traditional permanent magnet hoist.
[0027] The transmission mechanism 3 includes a fixed block 301, one side of which is fixedly connected to the inner cavity of the mounting shell 1. A long rod 302 is slidably connected to the inner cavity of the fixed block 301. A connecting block 303 is fixedly connected to one side of the long rod 302. A rack 304 is fixedly connected to one side of the connecting block 303. A fixing frame 305 is fixedly connected to one side of the magnetic plate 2. Two fixing frames 305 are provided. A round rod 306 is rotatably connected to the inner cavity of the fixing frame 305. A first gear 307 is provided on the surface of one of the round rods 306. The teeth of the first gear 307... The teeth of the toothed gear and the rack 304 mesh with each other. A second gear 308 is fixedly connected to the surface of one of the round rods 306. A connecting rod 309 is rotatably connected to the inner cavity of the magnetic plate 2. A third gear 310 is fixedly connected to the surface of the connecting rod 309. The teeth of the third gear 310 mesh with the teeth of the second gear 308. A hollow ring block 311 is fixedly connected to the surface of the connecting rod 309. Several such blocks are provided. A second magnet block 312 is fixedly connected to the inner cavity of the hollow ring block 311. An auxiliary mechanism 4 is provided in the inner cavity of the first gear 307.
[0028] The fixing block 301 can be used to support the long rod 302 and facilitate the sliding of the long rod 302 inside it. The long rod 302 can be subsequently used with hoisting equipment to assist in the adsorption of heavy objects. At the same time, it can install and fix the connecting block 303. The connecting block 303 is located inside the mounting shell 1 and can be used to support and fix the rack 304, so that the rack 304 can move with the long rod 302. The teeth of the rack 304 mesh with the teeth of the first gear 307. When it moves, it can drive the first gear 307 to rotate. 07 has round rods 306 on both sides for support and fixation. A second gear 308 is mounted on the surface of one of the round rods 306. When the first gear 307 rotates, it can synchronously assist the second gear 308 in rotating via the round rods 306. When the second gear 308 rotates, it meshes with the teeth of the third gear 310, causing the third gear 310 to rotate as well. Through the rack 304 and the first gear 307, the second gear 308 and the third gear 310 are driven to rotate, thus realizing the driving function of the double-pole gear. The third gear 310 is internally connected to a connecting rod 309, which rotates synchronously with the connecting rod 309. The connecting rod 309 can be used to support and fix the third gear 310 and the hollow ring block 311, and can install and fix multiple hollow ring blocks 311 in the middle of every two first magnet blocks 5. When it rotates, it will also drive multiple hollow ring blocks 311 to rotate together. The hollow ring block 311 can be used to install the second magnet block 312. Two magnet blocks 312 are installed inside each hollow ring block 311. The second magnet block 312 is arranged in the middle of the first magnet block 5. The magnets of each pair of second magnet blocks 312 installed on the hollow ring block 311 are opposite each other. They can be used to rotate together with the hollow ring block 311. When the second magnet block 312 rotates and its N pole is opposite to the S pole of the first magnet block 5, it can increase the magnetic force to attract and lift heavy objects. At the same time, when it rotates again and its S pole is opposite to the S pole of the first magnet block 5, it can help to achieve bipolar transmission to attract heavy objects and improve the use effect of traditional permanent magnet lifters.
[0029] Reference Figure 4 and Figure 6The auxiliary mechanism 4 includes a ratchet 401 located inside the first gear 307. One side of the ratchet 401 is fixedly connected to one side of a round rod 306. A mounting groove 402 is provided on the surface of the first gear 307, and a pawl 403 is provided inside the mounting groove 402. A first bearing 404 is fixedly connected to one side of the ratchet 401, and the outer ring of the first bearing 404 is fixedly connected to the inner cavity of the first gear 307. A spring 405 is fixedly connected to one side of the pawl 403, and one side of the spring 405 is fixedly connected to the inner cavity of the first gear 307. The ratchet 401 is installed in the middle of the two round rods 306 and is fixedly connected to both round rods 306, simultaneously located inside the first gear 307. It can be used to cooperate with the pawl 403 to assist in limiting the rotation of the first gear 307. The mounting groove 402 can be used to install the pawl 403, facilitating its rotation and function. When the rack 30... When the rack 304 moves upward to rotate the first gear 307, the pawl 403 will be pressurized by the inner wall of the mounting groove 402, which will push the ratchet 401 to rotate. This will cause the ratchet 401 to rotate synchronously, driving the round rod 306 to rotate, which will then assist in driving the second gear 308 and the third gear 310 to rotate. When the rack 304 moves downward to rotate the first gear 307, the pawl 403 can slide counterclockwise on the surface of the ratchet 401 through the first bearing 404 installed inside the first gear 307. This will prevent the first gear 307 from driving the ratchet 401 to rotate, thus completing the return of the rack 304 to its original position. The spring 405 can also help the pawl 403 return to its original position and engage with the ratchet 401. The auxiliary mechanism 4 can assist in the use of the transmission mechanism 3, assisting in driving the first gear 307 to rotate and drive the round rod 306, the second gear 308, and the third gear 310 to rotate.
[0030] Reference Figure 3 A support plate 6 is fixedly connected to one side of the magnetic plate 2. A groove 7 is provided on the surface of the support plate 6. One side of the rack 304 is slidably connected to the inner cavity of the groove 7. The support plate 6 can be used to assist the use of the groove 7. When the rack 304 moves, it will slide inside the groove 7. The stability of the movement of the rack 304 can be improved by the support plate 6 and the groove 7.
[0031] Reference Figure 4 The inner cavity of the fixed frame 305 is fixedly connected to a second bearing 8. The inner ring of the second bearing 8 is fixedly connected to the surface of the round rod 306. Multiple second bearings 8 are provided, two of which are installed between the fixed frame 305 and the round rod 306 respectively, and another is installed inside the first gear 307. This can help the round rod 306 and the first gear 307 rotate more smoothly. At the same time, one of the second bearings 8 is installed at one end of the connecting rod 309, which can help the connecting rod 309 to be positioned at the center.
[0032] Reference Figure 3 The surface of the long rod 302 is provided with a circular groove 9, and a dustproof ring block 10 is fixedly connected to the surface of the long rod 302. The circular groove 9 can be used to connect the subsequent transmission mechanism 3 with the hoisting equipment, so as to facilitate subsequent use with the hoisting equipment. The dustproof ring block 10 can be used to cover the groove of the mounting shell 1 where the long rod 302 is installed, so as to prevent external dust from entering the interior of the mounting shell 1 through the groove and accumulating, which would affect the use of various components inside the subsequent transmission mechanism 3.
[0033] Reference Figure 3 A reinforcing plate 11 is fixedly connected inside the mounting shell 1. A connecting post 12 is fixedly connected inside the cavity of the reinforcing plate 11. Several connecting posts 12 are provided. One side of the connecting post 12 is fixedly connected to one side of the magnetic plate 2. The reinforcing plate 11 and the connecting post 12 can be used to reinforce the installation of multiple magnetic plates 2, so that the magnetic plates 2 can be stably fixed inside the mounting shell 1.
[0034] Reference Figure 5 A hollow groove 13 is provided on the surface of the magnetic plate 2. A one-way bearing 14 is rotatably connected to the inner cavity of the hollow groove 13. The inner cavity of the one-way bearing 14 is fixedly connected to the surface of the connecting rod 309. The hollow groove 13 is opened on one side of the magnetic plate 2 inside the mounting shell 1 and can be used to install the one-way bearing 14. The one-way bearing 14 can center the other end of the connecting rod 309 to prevent the connecting rod 309 from reversing, thereby improving the stability of the one-way rotation of the connecting rod 309.
[0035] Working principle: When using this device, it is initially non-magnetic. Then, the long rod 302 can be connected to external hoisting equipment, causing it to rise. As the long rod 302 rises, it drives the connecting block 303 and rack 304 upwards together. At this time, the rack 304 meshes with the teeth of the first gear 307, causing the first gear 307 to rotate. The rotation of the first gear 307 causes the pawl 403 to push the ratchet 401 to rotate. The rotation of the ratchet 401 causes the round rod 306 and the second gear 308 to rotate together. Simultaneously, the rotation of the second gear 308 meshes with the teeth of the third gear 310, causing the third gear 310 to rotate. The rotation of the third gear 310 also... When the connecting rod 309 rotates, the hollow ring block 311 and the second magnet block 312 will also rotate 180° together with the connecting rod 309. At this time, the magnetism of the first magnet block 5 and the second magnet block 312 is added, and they exhibit magnetism externally. Then, the magnetism is transmitted through the magnetic plate 2 to attract the heavy object. In addition, when the long rod 302 falls, it will drive the rack 304 to move down together. The movement of the rack 304 will drive the first gear 307 to rotate in the opposite direction. Because a one-way bearing 14 is provided at one end of the connecting rod 309, the connecting rod 309 will not reverse at this time. Therefore, the third gear 310 fixedly connected to the connecting rod 309, the second gear 308 meshing with the third gear 310, and the round rod 306 will not reverse. Then, the long rod 302 is pulled again. 2. The rack 304 rises, causing the first gear 307 to rotate. The pawl 403 then pushes the ratchet 401 to rotate, thereby causing the second gear 308, the third gear 310, and the connecting rod 309 to rotate together. This causes the hollow ring block 311 and the second magnet block 312 to rotate another 180° with the connecting rod 309. At this point, the first magnet block 5 and the second magnet block 312 are magnetically opposed and do not exhibit external magnetism, releasing the load. This cycle from full magnetization to demagnetization eliminates the need for manual switching of the magnetic circuit to attract the load, improving the performance of traditional permanent magnet lifters. Specifically, by starting in a demagnetized state, the long rod 302 rises, causing the connecting rod 309 to rotate, which in turn causes the hollow ring block 311 and the second magnet block 312 to rotate 180° with the connecting rod 309. The first magnet 5 and the second magnet 312 combine to achieve full magnetization, displaying magnetism and attracting heavy objects. Then, the long rod 302 falls and rises again, causing the connecting rod 309 to rotate the hollow ring block 311 and the second magnet 312 another 180°. The first magnet 5 and the second magnet 312 then cancel each other out, becoming non-magnetic and releasing the heavy object. The long rod 302 then rises again, causing the first magnet 5 and the second magnet 312 to combine again, achieving full magnetization and attracting the heavy object. This cycle, from non-magnetic to fully magnetized, then back to non-magnetic, and then back to fully magnetized, eliminates the need for manual adjustment of the magnetic force, improving the practicality and effectiveness of traditional permanent magnet lifters.This solves the problem of traditional permanent magnet lifters relying on manual switching of the magnetic circuit during operation. Manual control can easily lead to magnet position deviations, resulting in incomplete addition or cancellation of magnetic forces. This causes unstable adsorption of loads, leading to load slippage, scratches on the load surface, and increased safety hazards caused by load slippage.
[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A two-stage gear transmission permanent magnet lifter comprising a mounting housing (1), characterised in that: The inner cavity of the mounting shell (1) is fixedly connected to a magnetic plate (2), and there are several magnetic plates (2). A first magnet block (5) is provided on one side of each of the two magnetic plates (2). The inner cavity of the mounting shell (1) is provided with a transmission mechanism (3). The transmission mechanism (3) includes a fixed block (301), one side of which is fixedly connected to the inner cavity of the mounting shell (1). A long rod (302) is slidably connected to the inner cavity of the fixed block (301). A connecting block (303) is fixedly connected to one side of the long rod (302). A rack (304) is fixedly connected to one side of the connecting block (303). A fixing frame (305) is fixedly connected to one side of the magnetic plate (2). Two fixing frames (305) are provided. A round rod (306) is rotatably connected to the inner cavity of the fixing frame (305). A first gear (307) is provided on the surface of one of the round rods (306). The teeth of the first gear (307) mesh with the teeth of the rack (304). A second gear (308) is fixedly connected to the surface of one of the round rods (306). A connecting rod (309) is rotatably connected to the inner cavity of the magnetic guide plate (2). A third gear (310) is fixedly connected to the surface of the connecting rod (309). The teeth of the third gear (310) mesh with the teeth of the second gear (308). A hollow ring block (311) is fixedly connected to the surface of the connecting rod (309). Several such blocks are provided. A second magnet block (312) is fixedly connected to the inner cavity of the hollow ring block (311). An auxiliary mechanism (4) is provided in the inner cavity of the first gear (307).
2. A two-stage gear transmission permanent magnet lifter according to claim 1, characterized in that: The auxiliary mechanism (4) includes a ratchet (401) located in the inner cavity of the first gear (307). One side of the ratchet (401) is fixedly connected to one side of the round rod (306). The surface of the first gear (307) is provided with a mounting groove (402). The inner cavity of the mounting groove (402) is provided with a pawl (403). One side of the ratchet (401) is fixedly connected to a first bearing (404). The outer ring of the first bearing (404) is fixedly connected to the inner cavity of the first gear (307). One side of the pawl (403) is fixedly connected to a spring (405). One side of the spring (405) is fixedly connected to the inner cavity of the first gear (307).
3. A two-stage gear transmission permanent magnet lifter according to claim 1, characterized in that: A support plate (6) is fixedly connected to one side of the magnetic plate (2). A groove (7) is provided on the surface of the support plate (6). One side of the rack (304) is slidably connected to the inner cavity of the groove (7).
4. A two-stage gear transmission permanent magnet lifter according to claim 1, characterized in that: The inner cavity of the fixing frame (305) is fixedly connected to a second bearing (8), and the inner ring of the second bearing (8) is fixedly connected to the surface of the round rod (306).
5. A two-stage gear transmission permanent magnet lifter according to claim 1, characterized in that: The surface of the long rod (302) is provided with a circular groove (9), and a dustproof ring block (10) is fixedly connected to the surface of the long rod (302).
6. A two-stage gear transmission permanent magnet lifter according to claim 1, characterized in that: The mounting shell (1) is fixedly connected to a reinforcing plate (11), and a connecting post (12) is fixedly connected to the inner cavity of the reinforcing plate (11). Several connecting posts (12) are provided, and one side of the connecting post (12) is fixedly connected to one side of the magnetic plate (2).
7. A two-stage gear transmission permanent magnet lifter according to claim 1, characterized in that: The surface of the magnetic plate (2) is provided with a hollow groove (13), and a one-way bearing (14) is rotatably connected to the inner cavity of the hollow groove (13). The inner cavity of the one-way bearing (14) is fixedly connected to the surface of the connecting rod (309).