A polishing device for precision machining of padlocks

Abstract

This utility model discloses a polishing device for precision machining of padlocks, aiming to solve the problem of low processing efficiency caused by the need to flip the padlocks during polishing. The key technical points are: it includes a base plate and a bracket fixed to the upper surface of the base plate; a lower fixing frame is fixedly mounted on the upper surface of the base plate; a lower grinding component is mounted on the inner wall of the lower fixing frame; a telescopic component is mounted on the top of the bracket; an upper fixing frame is fixedly mounted on the output end of the telescopic component; an upper grinding component is fixedly mounted on the inner wall of the upper fixing frame; a grinding channel for the padlock to pass through is formed between the upper and lower grinding components; and a placement table is fixedly connected to the side wall of the bracket. This utility model clamps the padlock with a clamping device, and then uses a driving device to drive the padlock through the grinding channel. Both sides of the padlock are simultaneously ground by the upper and lower grinding components, effectively improving the grinding efficiency of the padlock.

Description

Technical Field

[0001] This utility model relates to the field of padlock polishing technology, and more specifically, to a polishing device for precision padlock machining. Background Technology

[0002] A lock consists of a lock body, a lock cylinder, and a key. During the production of the lock body, a polishing device is used to polish the outer surface of the lock body to ensure that the outer surface of the lock body is smoother, making it easier for workers to carry out the next step of processing.

[0003] However, existing grinding and polishing devices can only fix lock bodies that are compatible with the locking block during use, and cannot flexibly clamp and fix lock bodies of different sizes, which limits the operation of the device.

[0004] To address the aforementioned issues, Chinese Patent Publication No. CN220427940U discloses a surface polishing mechanism, which includes a worktable. The worktable has a clamping assembly inside and a notch on its upper surface. A chip removal assembly is installed below the clamping assembly. The clamping assembly includes a motor, and the output end of the motor is connected to a lead screw. Guide posts are provided on both sides of the lead screw, and a movable block is installed on the outside of the lead screw. A clamping plate is connected to the top of the movable block, and a guide sleeve is provided at the bottom of the clamping plate.

[0005] The above solution, through the set clamping components, makes it easy to clamp and fix lock bodies of different sizes, making the grinding and polishing device more flexible to use and easy to grind lock bodies of different sizes. By starting the motor, the motor drives the lead screw to rotate, and the rotating lead screw and the fixed guide post drive the clamping plate to move, so that the two sets of clamping plates come closer to each other, and the two sets of clamping plates are used to clamp and fix the lock body.

[0006] However, in the above scheme, after the lock body is clamped, when it is polished by the polishing component, the upper polishing component can only polish one side of the lock body. This means that after polishing one side, the lock body needs to be removed from between the clamping plates, flipped and clamped again before polishing, which greatly affects the polishing efficiency.

[0007] Therefore, a solution needs to be proposed to address this problem. Utility Model Content

[0008] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a polishing device for padlock precision machining. After clamping the padlock with a clamping device, a driving device drives the padlock through the polishing channel. The upper and lower polishing components polish both sides of the padlock simultaneously, effectively improving the polishing efficiency of the padlock.

[0009] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a polishing device for precision machining of padlocks, comprising a base plate and a bracket fixed to the upper surface of the base plate, a lower fixing frame fixedly disposed on the upper surface of the base plate, a lower grinding component disposed on the inner wall of the lower fixing frame, a telescopic component disposed on the top of the bracket, an upper fixing frame fixedly mounted on the output end of the telescopic component, an upper grinding component fixedly disposed on the inner wall of the upper fixing frame, a grinding channel for padlocks to pass through formed between the upper grinding component and the lower grinding component, a placement platform fixedly connected to the side wall of the bracket, the upper surface of the placement platform being flush with the upper surface of the lower grinding component, a sliding plate slidably connected to the side wall of the bracket, a driving device for moving the sliding plate disposed on the side wall of the bracket, two symmetrically distributed clamping rods slidably connected to the side wall of the sliding plate, and a clamping device for moving the clamping rods disposed on the side wall of the sliding plate.

[0010] By adopting the above technical solution, the telescopic component is a hydraulic push rod. The telescopic component's extension and retraction can drive the upper fixed frame to rise and fall. The placement platform is located on the inner wall of the support near the starting end of the grinding channel. The placement platform is used to place the padlock, positioning it between the clamping rods on both sides. Then, the clamping device drives the clamping rods on both sides to clamp the padlock in the middle. The bottom surface of the padlock is flush with the upper end surface of the sanding belt of the lower grinding component. Then, the driving device drives the sliding plate to move towards the grinding channel. The sliding plate can then drive the clamping rods and the clamped padlock to move together. Upon reaching the beginning of the grinding channel, the bottom surface of the padlock contacts the lower grinding channel. Then, the telescopic extension component moves the upper fixed frame and the upper grinding component downwards until the sanding belt in the upper grinding component contacts the upper surface of the padlock. The upper and lower grinding components are then activated, and the padlock continues to move via a drive device. As the padlock moves along the grinding channel, the upper and lower grinding components can simultaneously grind and polish both sides of the padlock, eliminating the need for repeated flipping and disassembly of the padlock, making the polishing process more convenient and efficient.

[0011] The present invention is further configured such that: the driving device includes an installation groove provided on the side wall of the bracket and a first transmission roller rotatably connected at one end to the inner wall of the installation groove; a cavity is provided on the side wall of the bracket; a first motor for driving the first transmission roller to rotate is fixedly installed in the cavity; a movable frame is slidably connected to the inner wall of the installation groove; a second transmission roller is rotatably connected to the inner wall of the movable frame; a transmission belt is sleeved between the second transmission roller and the first transmission roller; a driving plate is fixedly connected to the transmission belt; and the side wall of the driving plate is fixedly connected to the sliding plate.

[0012] By adopting the above technical solution, transmission roller one and transmission roller two are used to drive the transmission belt for transmission movement. The other end of transmission roller one is connected to the output shaft of motor one. The rotation of motor one can drive transmission roller one to rotate as the driving wheel. Power is transmitted through tension and wheel surface friction to drive the transmission belt for transmission. Transmission roller two will rotate together as the driven wheel. The tension of the transmission belt can be adjusted by adjusting the position of the moving frame. In addition, limit discs are fixedly connected to the side walls of both ends of transmission roller one and transmission roller two to limit the transmission belt, reduce slippage, and make the transmission of the transmission belt more stable.

[0013] The present invention is further configured such that: the movable frame includes two symmetrically distributed horizontal plates, the two ends of the second transmission roller are respectively rotatably connected to the horizontal plates on both sides, a through groove is provided on the side wall of the mounting groove for the horizontal plates to extend and move, a vertical plate is fixedly connected to one end of the horizontal plates extending out of the through groove on both sides, a telescopic rod is fixedly installed on the side wall of the bracket, and the output end of the telescopic rod is fixedly connected to the side wall of the vertical plate.

[0014] By adopting the above technical solution, the telescopic rod is an electric push rod. When it is necessary to adjust the position of the second transmission roller, the vertical plate is moved by telescopic electric push rod. The movement of the vertical plate can drive the two horizontal plates to move together. The position of the second transmission roller installed on the horizontal plate can be adjusted by rotating it. The distance between the second transmission roller and the first transmission roller can be changed, thereby adjusting the tension of the transmission belt.

[0015] The present invention is further configured such that: two protruding plates are fixedly connected to the side wall of the bracket, a limiting rod is fixedly connected between the two protruding plates, and a limiting hole is provided on the side wall of the slide for the limiting rod to pass through.

[0016] By adopting the above technical solution, during the process of the conveyor belt driving the slide plate to move, the slide plate will always move along the limit rod. Through the limitation of the limit rod, the slide plate and the clamping rod can keep the slide plate in a vertical state during the movement of the padlock, reduce the load pressure on the conveyor belt in the vertical direction, and make the movement of the slide plate more stable.

[0017] The present invention is further configured such that: the clamping device includes a receiving groove provided on the side wall of the slide plate and a bidirectional lead screw with one end rotatably connected to the inner wall of the receiving groove; a motor for driving the bidirectional lead screw to rotate is fixedly installed on the side wall of the slide plate; a nut seat is provided on both the left-hand threaded section and the right-hand threaded section of the bidirectional lead screw; and the clamping rods on both sides are fixedly connected to the nut seats on both sides respectively.

[0018] By adopting the above technical solution, the padlock to be processed is placed between the clamping rods on both sides. The double-acting screw driven by motor two rotates to one side, causing the nut seats on both sides to move closer together. The nut seats on both sides then cause the clamping rods on both sides to move closer together until the clamping rods clamp the padlock in the middle. Then, motor two is turned off, and the clamping rods remain in the current position and remain clamped. Conversely, after polishing, the double-acting screw driven by motor two rotates in the opposite direction, causing the nut seats on both sides to move away from each other. This causes the nut seats to move the clamping rods on both sides away from each other, and the padlock is then released. The operation is convenient.

[0019] The present invention is further configured such that: a folding baffle one is fixedly connected between the nut seats on both sides, and a folding baffle two is fixedly provided between the nut seats on both sides and the inner wall of the receiving groove; both the folding baffle one and the folding baffle two are wavy in shape, and folding textures are provided at the turning points of the wavy shape of the folding baffle one and the folding baffle two.

[0020] By adopting the above technical solution, as the nut seats on both sides reciprocate with the forward and reverse rotation of the bidirectional lead screw, the first and second folding baffles will fold or unfold along the folding pattern. While not affecting the normal movement of the nut seats, they can cover the opening of the receiving groove, reduce the debris that splashes into the receiving groove during the polishing process, protect the bidirectional lead screw, and extend the service life of the bidirectional lead screw.

[0021] The present invention is further configured such that: a limiting block is fixedly connected to the side wall of the nut seat, and a limiting groove is provided on the inner wall of the receiving groove for the limiting block to be inserted and moved.

[0022] By adopting the above technical solution, as the nut seat moves with the rotation of the bidirectional lead screw, the limiting block will be inserted into the limiting groove and move together with the nut seat, making the nut seat more stable during the movement.

[0023] In summary, this utility model has the following beneficial effects:

[0024] This invention uses a clamping device to clamp the padlock, and then uses a driving device to drive the padlock through the grinding channel. The upper and lower grinding components grind both sides of the padlock simultaneously, effectively improving the grinding efficiency of the padlock. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the driving device and clamping device in this utility model;

[0028] Figure 4 This is a schematic diagram of the clamping device in this utility model.

[0029] In the diagram: 1. Base plate; 2. Bracket; 3. Lower fixed frame; 4. Lower grinding assembly; 5. Telescopic assembly; 6. Upper fixed frame; 7. Upper grinding assembly; 8. Placement platform; 9. Slide plate; 10. Clamping rod; 11. Mounting slot; 12. Transmission roller one; 13. Motor one; 14. Transmission roller two; 15. Transmission belt; 16. Drive plate; 17. Horizontal plate; 18. Vertical plate; 19. Telescopic rod; 20. Protruding plate; 21. Limiting rod; 22. Limiting hole; 23. Receiving groove; 24. Two-way lead screw; 25. Nut seat; 26. Motor two; 27. Folding baffle one; 28. Folding baffle two; 29. ​​Limiting block. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0031] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "set up / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The present invention will now be described in detail with reference to the accompanying drawings.

[0034] A polishing device for precision padlock machining, such as... Figures 1-4As shown, it includes a base plate 1 and a bracket 2 fixed to the upper surface of the base plate 1. A lower fixing frame 3 is fixedly installed on the upper surface of the base plate 1, and a lower grinding component 4 is installed on the inner wall of the lower fixing frame 3.

[0035] The top of the bracket 2 is equipped with a telescopic component 5, which is a hydraulic push rod. The output end of the telescopic component 5 is fixedly mounted with an upper fixed frame 6. An upper grinding component 7 is fixedly mounted on the inner wall of the upper fixed frame 6. A grinding channel for the padlock to pass through is formed between the upper grinding component 7 and the lower grinding component 4. Both the upper grinding component 7 and the lower grinding component 4 are belt abrasives. Several abrasive belt wheels are rotatably connected to the upper fixed frame 6 and the lower fixed frame 3. Abrasive belts are sleeved between the abrasive belt wheels. A drive motor for driving the rotation of the abrasive belt wheels is fixedly mounted on the side wall of the upper fixed frame 6 and the lower fixed frame 3. A limit plate is fixed to the end of the abrasive wheel. The specific structure is mature existing technology and is consistent with the grinding structure in the prior art, so it will not be described in detail here.

[0036] A placement platform 8 is fixedly connected to the side wall of the support 2. The upper surface of the placement platform 8 is flush with the upper surface of the lower grinding assembly 4. A sliding plate 9 is slidably connected to the side wall of the support 2. A driving device for moving the sliding plate 9 is provided on the side wall of the support 2. Two symmetrically distributed clamping rods 10 are slidably connected to the side wall of the sliding plate 9. A clamping device for moving the clamping rods 10 is provided on the side wall of the sliding plate 9. The clamping side of the clamping rod 10 is provided with anti-slip texture.

[0037] The driving device includes a mounting groove 11 on the side wall of the bracket 2 and a transmission roller 12, one end of which is rotatably connected to the inner wall of the mounting groove 11. A cavity is formed in the side wall of the bracket 2, and a motor 13, a servo motor, is fixedly installed inside the cavity to drive the transmission roller 12. One end of the transmission roller 12 is connected to the motor's output shaft. The rotation of the motor 13 drives the transmission roller 12 as the driving wheel to rotate, transmitting power through tension and wheel surface friction, thus driving the transmission belt 15 for transmission. The transmission roller 14 rotates together as the driven wheel.

[0038] A movable frame is slidably connected to the inner wall of the mounting groove 11. A second transmission roller 14 is rotatably connected to the inner wall of the movable frame. A transmission belt 15 is sleeved between the second transmission roller 14 and the first transmission roller 12. A drive plate 16 is fixedly connected to the transmission belt 15. The side wall of the drive plate 16 is fixedly connected to the slide plate 9.

[0039] The vertical plate 18 is moved by a telescopic electric push rod. The movement of the vertical plate 18 moves the two horizontal plates 17 together. Rotating the second transmission roller 14 mounted on the horizontal plate 17 adjusts its position, changing the distance between the second transmission roller 14 and the first transmission roller 12, thus adjusting the tension of the transmission belt 15. Furthermore, limiting discs are fixedly connected to the side walls at both ends of the first transmission roller 12 and the second transmission roller 14 to limit the movement of the transmission belt 15, reducing slippage and making the transmission of the transmission belt 15 more stable.

[0040] The movable frame includes two symmetrically distributed horizontal plates 17. The two ends of the transmission roller 14 are rotatably connected to the horizontal plates 17 on both sides. The side wall of the mounting groove 11 is provided with a through groove for the horizontal plates 17 to extend and move. A vertical plate 18 is fixedly connected to one end of the horizontal plates 17 that extends out of the through groove. A telescopic rod 19 is fixedly installed on the side wall of the bracket 2. The telescopic rod 19 is an electric push rod, and the output end of the telescopic rod 19 is fixedly connected to the side wall of the vertical plate 18.

[0041] Two protruding plates 20 are fixedly connected to the side wall of the bracket 2, and a limiting rod 21 is fixedly connected between the two protruding plates 20. A limiting hole 22 is provided on the side wall of the slide plate 9 for the limiting rod 21 to pass through. During the movement of the slide plate 9 driven by the transmission belt 15, the slide plate 9 will always move along the limiting rod 21. By limiting the movement of the slide plate 9 and the clamping rod 10 during the movement of the padlock, the slide plate 9 can be kept in a vertical state, reducing the load pressure on the transmission belt 15 in the vertical direction and making the movement of the slide plate 9 more stable.

[0042] The clamping device includes a receiving groove 23 provided on the side wall of the slide plate 9 and a bidirectional lead screw 24 with one end rotatably connected to the inner wall of the receiving groove 23. A second motor 26 for driving the bidirectional lead screw 24 to rotate is fixedly installed on the side wall of the slide plate 9. The second motor 26 is a servo motor. The other end of the bidirectional lead screw 24 is connected to the output shaft of the second motor 26. Nut seats 25 are sleeved on both the left-hand threaded section and the right-hand threaded section of the bidirectional lead screw 24. The clamping rods 10 on both sides are fixedly connected to the nut seats 25 on both sides respectively.

[0043] A folding baffle 27 is fixedly connected between the two nut seats 25. A folding baffle 28 is fixedly installed between the two nut seats 25 and the inner wall of the receiving groove 23. Both the folding baffle 27 and the folding baffle 28 are wavy. Folding textures are provided at the turning points of the wavy shape of the folding baffle 27 and the folding baffle 28.

[0044] As the nut seats 25 on both sides reciprocate with the forward and reverse rotation of the bidirectional lead screw 24, the first folding baffle 27 and the second folding baffle 28 will fold or unfold along the folding pattern. While not affecting the normal movement of the nut seats 25, they can cover the opening of the receiving groove 23, reduce the debris that splashes into the receiving groove 23 during the polishing process, protect the bidirectional lead screw 24, and extend the service life of the bidirectional lead screw 24.

[0045] A limiting block 29 is fixedly connected to the side wall of the nut seat 25, and a limiting groove is provided on the inner wall of the receiving groove 23 for the limiting block 29 to be inserted and moved. As the nut seat 25 moves with the rotation of the bidirectional lead screw 24, the limiting block 29 will be inserted into the limiting groove and move together with the nut seat 25, making the nut seat 25 more stable during the movement.

[0046] Working principle: When the padlock needs to be polished, first place the padlock on the placement platform 8 so that the padlock is between the two clamping rods 10. Then, the motor 26 drives the double-acting screw 24 to rotate to one side, causing the two sides to move closer to each other. The nut seat 25 can then drive the two clamping rods 10 to move closer to each other until the two clamping rods 10 clamp the lock body in the middle. Then, turn off the motor so that the nut seat 25 and the clamping rods 10 stay in the current position and remain clamped.

[0047] After clamping, the motor 13 drives the transmission roller 12 to rotate, which in turn drives the transmission belt 15 to transmit the padlock. During transmission, the transmission belt 15 drives the slide plate 9 to move together via the drive plate 16. The padlock held by the clamping rod 10 on the slide plate 9 can also move together, taking the padlock away from the placement table 8 and moving it to the beginning of the grinding channel. The lower surface of the padlock first contacts the lower grinding component 4, and then the telescopic component 5 extends so that the upper grinding component 7 contacts the upper surface of the padlock. In this way, after the padlock enters the grinding channel, the upper grinding component 7 and the lower grinding component 4 will grind the upper and lower surfaces of the padlock without disassembling and flipping the padlock. In addition, the height of the clamping rod 10 is less than the height of the padlock, so as to avoid the clamping rod 10 protruding from the upper and lower sides of the padlock and affecting the grinding process of the padlock.

[0048] After the padlock is polished in the polishing channel, the transmission roller 12 is driven by motor 13 to rotate in the opposite direction, which drives the transmission belt 15 to transport in the opposite direction. The transmission belt 15 can then drive the slide plate 9 to move in the opposite direction through the drive plate 16. The clamping bar 10 and the padlock on the slide plate 9 can then return to the top of the placement table 8. Then, the bidirectional lead screw 24 is driven by motor 26 to rotate in the opposite direction, which drives the nut seats 25 on both sides and the clamping bar 10 to move away from each other, releasing the padlock and allowing it to be easily removed.

[0049] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A polishing device for precision machining of padlocks, comprising a base plate (1) and a bracket (2) fixed to the upper surface of the base plate (1), characterized in that: A lower fixing frame (3) is fixedly installed on the upper end face of the base plate (1). A lower grinding component (4) is installed on the inner wall of the lower fixing frame (3). A telescopic component (5) is installed on the top of the bracket (2). An upper fixing frame (6) is fixedly installed on the output end of the telescopic component (5). An upper grinding component (7) is fixedly installed on the inner wall of the upper fixing frame (6). A grinding channel for the padlock to pass through is formed between the upper grinding component (7) and the lower grinding component (4). A placement platform (8) is fixedly connected to the side wall of (2). The upper end face of the placement platform (8) is flush with the upper end face of the lower grinding assembly (4). A sliding plate (9) is slidably connected to the side wall of the support (2). A driving device for moving the sliding plate (9) is provided on the side wall of the support (2). Two symmetrically distributed clamping rods (10) are slidably connected to the side wall of the sliding plate (9). A clamping device for moving the clamping rods (10) is provided on the side wall of the sliding plate (9).

2. The polishing equipment for precision machining of padlocks according to claim 1, characterized in that: The driving device includes an installation groove (11) on the side wall of the bracket (2) and a transmission roller (12) with one end rotatably connected to the inner wall of the installation groove (11). A cavity is provided on the side wall of the bracket (2). A motor (13) for driving the transmission roller (12) to rotate is fixedly installed in the cavity. A movable frame is slidably connected to the inner wall of the installation groove (11). A transmission roller (14) is rotatably connected to the inner wall of the movable frame. A transmission belt (15) is sleeved between the transmission roller (14) and the transmission roller (12). A driving plate (16) is fixedly connected to the transmission belt (15). The side wall of the driving plate (16) is fixedly connected to the slide plate (9).

3. The polishing equipment for precision machining of padlocks according to claim 2, characterized in that: The movable frame includes two symmetrically distributed horizontal plates (17). The two ends of the transmission roller (14) are rotatably connected to the horizontal plates (17) on both sides respectively. The side wall of the mounting groove (11) is provided with a through groove for the horizontal plates (17) to extend and move. The end of the horizontal plates (17) on both sides extending out of the through groove is fixedly connected to a vertical plate (18). A telescopic rod (19) is fixedly installed on the side wall of the bracket (2). The output end of the telescopic rod (19) is fixedly connected to the side wall of the vertical plate (18).

4. The polishing equipment for precision machining of padlocks according to claim 2, characterized in that: Two protruding plates (20) are fixedly connected to the side wall of the bracket (2), and a limiting rod (21) is fixedly connected between the two protruding plates (20). A limiting hole (22) is provided on the side wall of the slide plate (9) for the limiting rod (21) to pass through.

5. The polishing equipment for precision machining of padlocks according to claim 1, characterized in that: The clamping device includes a receiving groove (23) provided on the side wall of the slide plate (9) and a bidirectional lead screw (24) with one end rotatably connected to the inner wall of the receiving groove (23). A motor (26) for driving the bidirectional lead screw (24) to rotate is fixedly installed on the side wall of the slide plate (9). Nut seats (25) are provided on both the left-hand threaded section and the right-hand threaded section of the bidirectional lead screw (24). The clamping rods (10) on both sides are fixedly connected to the nut seats (25) on both sides respectively.

6. The polishing equipment for precision machining of padlocks according to claim 5, characterized in that: A folding baffle (27) is fixedly connected between the two nut seats (25) on both sides, and a folding baffle (28) is fixedly provided between the two nut seats (25) on both sides and the inner wall of the receiving groove (23). The folding baffle (27) and the folding baffle (28) are both wavy, and folding textures are provided at the turning points of the wavy shape of the folding baffle (27) and the folding baffle (28).

7. The polishing equipment for precision machining of padlocks according to claim 5, characterized in that: A limiting block (29) is fixedly connected to the side wall of the nut seat (25), and a limiting groove is provided on the inner wall of the receiving groove (23) for the limiting block (29) to be inserted and moved.

Images