Drilling device for aluminum profile production

Abstract

The invention relates to the technical field of aluminum profile production, in particular to a drilling device for aluminum profile production, which comprises a rack, a drilling assembly mounted on the surface of the rack, a cleaning assembly mounted on the surface of the rack, and a drilling assembly mounted on the surface of the rack, the cleaning assembly comprises moving seats fixed to the front side and the rear side of the surface of the rack, and a cleaning scraper is arranged between the two moving seats, aluminum scraps and waste generated during drilling can be efficiently pushed to the edge of the workbench through the arranged cleaning assembly, it is avoided that waste residues affect follow-up machining or pollute the environment, manual intervention is not needed, the labor intensity of workers is reduced, and the working efficiency is improved. According to the aluminum skimming machine, an operator does not need to stretch out hands to clean aluminum skimming in the machining process, the risk of being scratched is reduced, additional manual operation or an independent power source is not needed in the whole process, precise linkage with the drilling procedure is formed, procedure interruption is avoided, the continuity and the automation degree of the machining process are greatly improved, and the overall machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of aluminum profile production, and in particular to a drilling device for aluminum profile production. BACKGROUND

[0002] Aluminum profile is an alloy material taking aluminum as the main component. Aluminum rods are melted and extruded to obtain aluminum materials with different cross-sectional shapes. However, the proportion of the added alloy is different, and the mechanical properties and application fields of the produced aluminum profiles are also different. The aluminum profile has excellent performance and high market value. In the aluminum profile production and processing process, drilling is a common and key process, which directly affects the assembly precision and use performance of the aluminum profile. The existing drilling device for aluminum profile production produces a large amount of aluminum chips and waste during drilling. The aluminum chips and waste are mainly cleaned by manual cleaning, and the processing flow needs to be interrupted in the drilling gap, which leads to poor process continuity and low overall efficiency. A small number of devices equipped with automatic cleaning function often need independent power source and control mechanism, which not only increases the equipment cost and energy consumption, but also affects the drilling stability and cleaning effect due to the action interference between the cleaning mechanism and the drilling mechanism, and it is difficult to meet the efficient, accurate and clean aluminum profile production and processing requirements. SUMMARY

[0003] The technical problem to be solved by the application is to provide a drilling device for aluminum profile production, which can efficiently push the aluminum chips and waste generated during drilling to the edge of the workbench, avoid the influence of residual waste on subsequent processing or environmental pollution, and greatly improve the continuity and automation degree of the processing flow without manual intervention.

[0004] The technical solution adopted by the application to solve the technical problem is a drilling device for aluminum profile production, which comprises a rack, a workbench fixed on the surface of the rack, a drilling assembly installed on the surface of the rack, the drilling assembly comprising a lifting cylinder arranged above the rack, an output end of the lifting cylinder being fixed with a lifting seat, and a drilling machine being fixed on the surface of the lifting seat. The drilling device further comprises a cleaning assembly installed on the surface of the rack, the cleaning assembly comprising two moving seats fixed on the front and rear surfaces of the rack, a cleaning scraper being arranged between the two moving seats, a collecting hopper being arranged below the workbench, the collecting hopper being fixed in the interior of the rack, and a collecting box being placed below the collecting hopper.

[0005] Further, the surface of the rack is fixed with a fixed frame on the left and right sides, two groups of the fixed frame are rotationally connected with a lead screw, one side of one group of the fixed frame is screw connected with a horizontal moving motor, and the output end of the horizontal moving motor is connected with one end of the lead screw, the surface of the lead screw is threadedly connected with a moving block, the moving block is slidingly connected on the surface of the positioning rail fixed between the two groups of fixed frames, and the body of the lifting cylinder is screw connected on the surface of the moving block.

[0006] Further, the surface of the rack is fixed with a fixed frame on the left and right sides, two groups of the fixed frame are rotationally connected with a lead screw, one side of one group of the fixed frame is screw connected with a horizontal moving motor, and the output end of the horizontal moving motor is connected with one end of the lead screw, the surface of the lead screw is threadedly connected with a moving block, the moving block is slidingly connected on the surface of the positioning rail fixed between the two groups of fixed frames, and the body of the lifting cylinder is screw connected on the surface of the moving block.

[0007] Further, the surface of the rack is fixed with a fixed frame on the left and right sides, two groups of the fixed frame are rotationally connected with a lead screw, one side of one group of the fixed frame is screw connected with a horizontal moving motor, and the output end of the horizontal moving motor is connected with one end of the lead screw, the surface of the lead screw is threadedly connected with a moving block, the moving block is slidingly connected on the surface of the positioning rail fixed between the two groups of fixed frames, and the body of the lifting cylinder is screw connected on the surface of the moving block.

[0008] Further, the surface of the rack is fixed with a fixed frame on the left and right sides, two groups of the fixed frame are rotationally connected with a lead screw, one side of one group of the fixed frame is screw connected with a horizontal moving motor, and the output end of the horizontal moving motor is connected with one end of the lead screw, the surface of the lead screw is threadedly connected with a moving block, the moving block is slidingly connected on the surface of the positioning rail fixed between the two groups of fixed frames, and the body of the lifting cylinder is screw connected on the surface of the moving block.

[0009] Further, the surface of the rack is fixed with a fixed frame on the left and right sides, two groups of the fixed frame are rotationally connected with a lead screw, one side of one group of the fixed frame is screw connected with a horizontal moving motor, and the output end of the horizontal moving motor is connected with one end of the lead screw, the surface of the lead screw is threadedly connected with a moving block, the moving block is slidingly connected on the surface of the positioning rail fixed between the two groups of fixed frames, and the body of the lifting cylinder is screw connected on the surface of the moving block.

[0010] Further, the surface of the rack is fixed with a fixed frame on the left and right sides, two groups of the fixed frame are rotationally connected with a lead screw, one side of one group of the fixed frame is screw connected with a horizontal moving motor, and the output end of the horizontal moving motor is connected with one end of the lead screw, the surface of the lead screw is threadedly connected with a moving block, the moving block is slidingly connected on the surface of the positioning rail fixed between the two groups of fixed frames, and the body of the lifting cylinder is screw connected on the surface of the moving block.

[0011] The present application has the advantages of solving the defects in the background art, 1. The drilling assembly can accurately adjust the drilling position in the horizontal direction, can adapt to the diversified drilling needs of different aluminum profiles, improve the universality of the equipment, has high automation degree, and can effectively improve the drilling efficiency.

[0012] 2. The cleaning components can efficiently push aluminum chips and waste generated during drilling to the edge of the worktable, preventing waste residue from affecting subsequent processing or polluting the environment. No manual intervention is required, so operators do not need to reach out to clean aluminum chips during processing, reducing the risk of being scratched. The entire process does not require additional manual operation or independent power source, and it forms a precise linkage with the drilling process, avoiding process interruption, greatly improving the continuity and automation of the processing flow, and improving the overall processing efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure One ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure Two ; Figure 3 This is a schematic diagram of the drilling assembly in this invention; Figure 4 This is a partial cross-sectional view of the movable seat in this invention; Figure 5 This is a schematic diagram of the gear structure in this invention; Figure 6 In this invention Figure 5 Enlarged view of point A; In the diagram: 1. Frame; 2. Workbench; 3. Drilling assembly; 31. Fixed frame; 32. Lead screw; 33. Transverse motor; 34. Moving block; 35. Lifting cylinder; 36. Lifting seat; 37. Drilling machine; 4. Cleaning assembly; 41. Moving seat; 42. Tension spring; 43. Sliding block; 44. Cleaning scraper; 45. Pull rope; 46. Take-up roller; 47. Drive shaft; 48. Gear; 49. Inner ring plate; 410. Pawl; 411. Spring; 412. Armature; 413. Electromagnet; 414. Rack; 415. Connecting plate; 416. Collection hopper; 417. Collection box. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0015] like Figure 1 As shown: A drilling device for aluminum profile production includes a frame 1, on the surface of which a worktable 2 is fixed.

[0016] like Figures 1-6 As shown: In combination with the above, in order to accurately adjust the horizontal drilling position, a drilling assembly 3 is installed on the surface of the rack 1, which includes a lifting cylinder 35 arranged above the rack 1, and the output end of the lifting cylinder 35 is fixed with a lifting seat 36, and the surface of the lifting seat 36 is fixed with a drilling machine 37.

[0017] In this embodiment: when drilling processing of aluminum profiles is needed, first place the aluminum profile to be processed on the surface of the workbench 2, extend the output end of the lifting cylinder 35, push the lifting seat 36 and the surface-fixed drilling machine 37 to move downward, so that the drill bit of the drilling machine 37 contacts and penetrates the aluminum profile placed on the surface of the workbench 2, completes the drilling work, and after the drilling is completed, the lifting cylinder 35 is retracted to drive the drilling machine 37 to rise to the initial position, waiting for the next operation.

[0018] In an alternative embodiment: the surface of the rack 1 is fixed with a fixed frame 31 on both sides, and a lead screw 32 is rotatably connected between the two fixed frames 31, one side of one of the fixed frames 31 is screw-connected with a horizontal moving motor 33, the output end of the horizontal moving motor 33 is connected with one end of the lead screw 32, the surface of the lead screw 32 is screw-connected with a moving block 34, the moving block 34 is slidingly connected to the surface of the positioning rail fixed between the two fixed frames 31, and the body of the lifting cylinder 35 is screw-connected to the surface of the moving block 34.

[0019] In this embodiment: when the drilling position needs to be adjusted, the horizontal moving motor 33 is started, the output end of the horizontal moving motor 33 drives the lead screw 32 to rotate between the two fixed frames 31, and since the moving block 34 screw-connected to the surface of the lead screw 32 is limited by the positioning rail between the two fixed frames 31 and cannot rotate with the lead screw 32, the stability of the drilling machine 37 during movement and drilling is ensured, the processing error is reduced, and the drilling quality is guaranteed, so the moving block 34 will move horizontally along the axial surface of the lead screw 32, thereby driving the lifting cylinder 35 and the drilling machine 37 fixed to the surface of the moving block 34 to move horizontally synchronously, achieving horizontal adjustment of the drilling position and adapting to different drilling position requirements.

[0020] Further more: In combination with the above, in order to push the aluminum chips and waste generated by drilling to the edge of the workbench 2 to avoid the influence of residual waste on subsequent processing or pollution of the environment, a cleaning assembly 4 is installed on the surface of the rack 1, which includes moving seats 41 fixed on the front and rear surfaces of the rack 1, a cleaning scraper 44 is arranged between the two moving seats 41, a collecting hopper 416 is arranged below the workbench 2, the collecting hopper 416 is fixed inside the rack 1, and a collecting box 417 is placed below the collecting hopper 416 on the bottom of the rack 1.

[0021] In the embodiment: the aluminum scraps and waste produced by drilling are pushed to the edge of the workbench 2 during the transverse movement of the cleaning scraper 44 between the two groups of moving seats 41, and the waste falls into the collecting hopper 416 below through the gap of the workbench 2, and then falls into the collecting box 417 at the bottom of the rack 1 after being converged through the collecting hopper 416, so as to realize the centralized storage of the waste, which can be directly taken out and poured when the collecting box 417 is full, facilitating the subsequent recycling of aluminum scraps and other waste and improving the resource utilization rate, while keeping the processing area clean and facilitating the subsequent recycling and processing.

[0022] In an optional embodiment: the two ends of the cleaning scraper 44 are symmetrically fixed with sliding blocks 43 which are slidingly connected in the sliding grooves in the moving seats 41, and the side of the sliding block 43 is fixed with the tension spring 42 between the inside of the moving seat 41, the bottom of the cleaning scraper 44 is in an arc structure, and the bottom of the cleaning scraper 44 is made of flexible material.

[0023] In the embodiment: the sliding block 43 slides in the sliding groove of the moving seat 41 and stretches the tension spring 42 to deform and generate elastic force, thereby driving the cleaning scraper 44 between the two groups of moving seats 41 to move transversely, and the bottom of the cleaning scraper 44 is in an arc flexible structure which can closely fit the surface of the aluminum profile after drilling is completed, and the aluminum scraps and waste produced by drilling are pushed to the edge of the workbench 2 during the movement.

[0024] In an optional embodiment: the side of the sliding block 43 away from the tension spring 42 is fixed with a pull rope 45, one end of the moving seat 41 is provided with a winding roller 46, the end of the pull rope 45 is wound around the surface of the winding roller 46, the two groups of winding rollers 46 are fixed with a transmission shaft 47 which is rotatably connected between the two groups of moving seats 41 through a bearing frame, the inside of the moving seat 41 is provided with a let-hole through hole matched with the pull rope 45, one side of the lifting seat 36 is fixed with a connecting plate 415, the inside of the fixed frame 31 is provided with a lifting groove matched with the connecting plate 415, the bottom surface of the connecting plate 415 is fixed with a rack 414 which is slidingly connected in the positioning frame fixed on the surface of the rack 1, the surface of the rack 414 is engaged with a gear 48 which is rotatably connected on the surface of the transmission shaft 47, the inside of the gear 48 is provided with a ratchet cavity, the side of the transmission shaft 47 close to the ratchet cavity is fixed with an inner ring plate 49, the surface of the inner ring plate 49 is hinged with a plurality of groups of ratchet claws 410 arranged in a ring array, the ratchet claws 410 and the inner ring plate 49 are fixed with springs 411, the surface of the ratchet claws 410 is fixed with an armature 412, the side of the inner ring plate 49 close to the armature 412 is fixed with an electromagnet 413, and the electromagnet 413 is magnetically connected with the armature 412 after being electrified.

[0025] In the embodiment: when the lifting seat 36 is lowered to drive the drill 37 to drill, the connecting plate 415 on one side is lowered synchronously, thereby driving the fixed rack 414 on the bottom surface to slide along the positioning frame, the rack 414 meshes with the gear 48, thereby driving the gear 48 to rotate, at this time, the ratchet cavity inside the gear 48 cooperates with the pawl 410 on the inner ring plate 49 on the surface of the transmission shaft 47, so that the pawl 410 slides along the direction of the ratchet cavity inside the gear 48, therefore the rotation of the gear 48 will not drive the inner ring plate 49 and the transmission shaft 47 to rotate synchronously through the pawl 410, the gear 48 will be idling on the surface of the transmission shaft 47, the transmission shaft 47 and the winding roller 46 do not rotate, realizing one-way transmission. When the drilling is completed, the lifting seat 36 is raised, the rack 414 drives the gear 48 to rotate reversely, at this time, with the reverse rotation of the gear 48, the pawl 410 will be clamped into the ratchet cavity under the elastic force of the spring 411, the rotation of the gear 48 drives the inner ring plate 49 and the transmission shaft 47 to rotate synchronously through the pawl 410, when the transmission shaft 47 rotates, the winding rollers 46 at both ends rotate synchronously, the winding roller 46 winds the pulling rope 45 on the surface, the pulling rope 45 pulls the sliding block 43 through the gap hole in the moving seat 41, so that the sliding block 43 slides in the sliding groove of the moving seat 41 and stretches the tension spring 42 to generate elastic force, thereby driving the cleaning scraper 44 between the two moving seats 41 to move transversely. When the lifting seat 36 is raised to the initial position, at this time the electromagnet 413 is energized, the pawl 410 is separated from the ratchet cavity by attracting the armature 412, so that the transmission shaft 47 idles relative to the gear 48, then the sliding block 43 is reversely moved by the reset of the tension spring 42, so that the cleaning scraper 44 returns to the initial position, completing a cleaning cycle.

[0026] The working principle and use process of the present application: when the aluminum profile needs to be drilled, first place the aluminum profile to be processed on the surface of the workbench 2, when the drilling position needs to be adjusted, start the horizontal moving motor 33, the output end drives the screw rod 32 to rotate between the two groups of fixed frames 31, because the moving block 34 connected with the screw rod 32 surface thread cannot rotate with the screw rod 32 due to the limitation of the positioning rail between the two groups of fixed frames 31, the stability of the drilling machine 37 during movement and drilling is ensured, the processing error is reduced, and the drilling quality is guaranteed, so the moving block 34 will move horizontally along the axial surface of the screw rod 32, and then drive the lifting cylinder 35 and the drilling machine 37 fixed on the surface of the moving block 34 to move horizontally synchronously, realize the horizontal adjustment of the drilling position, and adapt to different drilling position requirements, when the drilling position is determined, the output end of the lifting cylinder 35 is elongated, pushes the lifting seat 36 and the drilling machine 37 fixed on the surface to move downward, so that the drill bit of the drilling machine 37 contacts and penetrates the aluminum profile placed on the surface of the workbench 2, completes the drilling work, after drilling is completed, the lifting cylinder 35 is retracted, drives the drilling machine 37 to rise to the initial position, waits for the next operation, can accurately adjust the horizontal drilling position, can adapt to the diversified drilling requirements of different aluminum profiles, improves the universality of the equipment, has high automation degree, and can effectively improve the efficiency of drilling operation.

[0027] Further, when the lifting seat 36 drives the drilling machine 37 to drill, the connecting plate 415 on one side moves downward synchronously, and then drives the fixed rack 414 on the bottom surface to slide along the positioning frame, the rack 414 is engaged with the gear 48, and then drives the gear 48 to rotate, at this time, the ratchet cavity inside the gear 48 cooperates with the pawl 410 on the inner ring plate 49 on the surface of the transmission shaft 47, so that the pawl 410 slides along the direction of the ratchet cavity inside the gear 48, therefore the rotation of the gear 48 will not drive the inner ring plate 49 and the transmission shaft 47 to rotate synchronously through the pawl 410, the gear 48 will idle on the surface of the transmission shaft 47, the transmission shaft 47 and the winding roller 46 do not rotate, realizing one-way transmission, ensuring the accuracy of power transmission, making the actions of drilling stage and subsequent cleaning stage strictly separated, avoiding the mechanical structures of the two processes interfering with each other, and improving the stability of the overall device operation.

[0028] It is worth noting that: the one-way transmission is realized by the cooperation of the pawl 410 and the ratchet cavity, which ensures that the cleaning assembly 4 does not act during drilling, and the cleaning assembly 4 starts accurately after drilling is completed, avoiding the action interference between different processes, ensuring the orderly progress of drilling and cleaning process, improving the stability and reliability of the equipment operation, realizing the orderly triggering of the cleaning function, and making the connection between drilling and cleaning process smooth.

[0029] Further, when the drilling is completed, the lifting seat 36 rises, the rack 414 drives the gear 48 to rotate reversely, at this time, with the reverse rotation of the gear 48, the pawl 410 is clamped into the ratchet cavity under the elastic force of the spring 411, the rotation of the gear 48 drives the inner ring plate 49 and the transmission shaft 47 to rotate synchronously through the pawl 410, when the transmission shaft 47 rotates, the winding rollers 46 at both ends rotate synchronously, the winding rope 45 is pulled through the gap hole in the moving seat 41 to pull the sliding block 43, the sliding block 43 slides in the sliding groove of the moving seat 41 and stretches the tension spring 42 to generate elastic force, and then drives the cleaning scraper 44 between the two moving seats 41 to move transversely, the bottom of the cleaning scraper 44 is an arc flexible structure, which can closely fit the surface of the aluminum profile after drilling, and pushes the aluminum chips and waste generated during drilling to the edge of the workbench 2 during movement, and the waste falls into the collecting hopper 416 below through the gap of the workbench 2, and then falls into the collecting box 417 at the bottom of the rack 1 after being gathered in the collecting hopper 416, so as to realize the centralized storage of the waste, and when the collecting box 417 is full, it can be directly taken out and poured, which is convenient for subsequent recycling and utilization of aluminum chips and waste, improves the resource utilization rate, keeps the processing area clean, and facilitates subsequent recycling and processing. When the lifting seat 36 rises to the initial position, the electromagnet 413 is energized to attract the armature 412 to make the pawl 410 disengage from the ratchet cavity, so that the transmission shaft 47 rotates relative to the gear 48, and then the sliding block 43 is pulled in the reverse direction through the reset of the tension spring 42 to move reversely, so that the cleaning scraper 44 returns to the initial position, completing a cleaning cycle. The aluminum chips and waste generated during drilling are efficiently pushed to the edge of the workbench 2, avoiding the influence of residual waste on subsequent processing or environmental pollution, without manual intervention, so that the operator does not need to stretch his hand to clean the aluminum chips, especially the sharp metal chips, reducing the risk of being cut. The whole process does not need additional manual operation or independent power source, forms precise linkage with the drilling process, avoids process interruption, greatly improves the coherence and automation degree of the processing flow, and improves the overall processing efficiency.

[0030] It is worth noting that: the bottom of the cleaning scraper 44 adopts an arc flexible structure, which can closely fit the surface of the aluminum profile, and can effectively remove the aluminum chips and waste generated during drilling even if it faces the curvature or slight protrusions on the surface of the profile, avoiding the influence of residual debris on subsequent processing or scratching the surface of the profile.

[0031] The above description is only a specific embodiment of the present application, and various examples do not limit the essential content of the present application, and those skilled in the art can modify or deform the previously described specific embodiments without departing from the essence and scope of the present application after reading the specification.

Claims

1. A drilling device for aluminum profile production, comprising a frame (1), the surface of the frame (1) is fixed with a workbench (2), characterized in that: Also include the installation in the surface of the frame (1) drilling assembly (3), the drilling assembly (3) includes the lifting cylinder (35) arranged above the frame (1), the output end of the lifting cylinder (35) is fixed with lifting seat (36), the surface of the lifting seat (36) is fixed with drilling machine (37); Also include the installation in the surface of the frame (1) cleaning assembly (4), the cleaning assembly (4) includes the mobile seat (41) fixed on the surface of the frame (1) front and back, two groups of the mobile seat (41) are provided with cleaning scraper (44), the lower portion of the workbench (2) is provided with collecting hopper (416), the collecting hopper (416) is fixed in the inside of the frame (1), the frame (1) bottom is placed with collecting box (417) just below the collecting hopper (416).

2. The drilling device for aluminum profile production according to claim 1, characterized in that: The surface of the frame (1) is fixed with the fixed frame (31) on both sides, two groups of the fixed frame (31) are rotatably connected with the lead screw (32), one side of one group of the fixed frame (31) is screw connected with the horizontal moving motor (33), and the output end of the horizontal moving motor (33) is connected with one end of the lead screw (32), the surface of the lead screw (32) is screw connected with the moving block (34), the moving block (34) is slidably connected on the surface of the positioning rail fixed between the two groups of fixed frame (31), and the body of the lifting cylinder (35) is screw connected on the surface of the moving block (34).

3. The drilling device for producing aluminum profile according to claim 2, characterized in that: Both ends of the cleaning scraper (44) are symmetrically fixed with the sliding block (43), the sliding block (43) is slidably connected in the sliding groove formed in the inside of the mobile seat (41), the inside of the sliding block (43) is fixed with the tension spring (42) between one side and the mobile seat (41), the bottom of the cleaning scraper (44) is of arc structure, and the bottom of the cleaning scraper (44) is of flexible material.

4. The aluminum profile production drilling device according to claim 3, characterized in that: The side, away from the tension spring (42), of the sliding block (43) is fixed with the pull rope (45), one end of the mobile seat (41) is provided with the winding roller (46), the end of the pull rope (45) is wound on the surface of the winding roller (46), two groups of the winding roller (46) are fixed with the transmission shaft (47), and the transmission shaft (47) is rotatably connected between the two groups of mobile seat (41) through the bearing frame, the inside of the mobile seat (41) is formed with the accommodation through hole matched with the pull rope (45).

5. The aluminum profile production drilling device according to claim 4, characterized in that: One side of the lifting seat (36) is fixed with the connecting plate (415), the inside of the fixed frame (31) is formed with the lifting groove matched with the connecting plate (415), the bottom surface of the connecting plate (415) is fixed with the rack (414), the rack (414) is slidably connected in the positioning frame fixed on the surface of the frame (1), and the surface of the rack (414) is engagedly connected with the gear (48).

6. The aluminum profile production drilling device according to claim 5, characterized in that: The gear (48) is rotationally connected on the surface of the transmission shaft (47), the inside of the gear (48) is provided with a ratchet cavity, the surface of the transmission shaft (47) is fixedly provided with an inner ring plate (49) on the side close to the ratchet cavity, and the surface of the inner ring plate (49) is hingedly provided with a plurality of groups of ratchet claws (410) in annular array; the ratchet claws (410) and the inner ring plate (49) are fixedly provided with springs (411).

7. The aluminum profile production drilling device according to claim 6, characterized in that: The surface of the ratchet claw (410) is fixedly provided with an armature (412), one side of the surface of the inner ring plate (49) is fixedly provided with an electromagnet (413) close to the armature (412), and the electromagnet (413) is magnetically connected with the armature (412) after being electrified.

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