Automatic chain cutting device

Abstract

The invention discloses an automatic chain cutting device, and relates to the technical field of automatic chain production equipment.The automatic chain cutting device comprises a workbench, two limiting plates are arranged on the workbench in a spaced mode, a sliding groove is formed between the two limiting plates, the workbench is provided with a falling groove communicating with the sliding groove, the falling groove is used for a pin shaft to penetrate through, and a mounting plate is slidably connected with two needle heads; a linkage assembly is connected between the mounting plate and the carrying plate, and the carrying plate drives the two needle heads to slide in the direction close to each other or away from each other through the linkage assembly. When the distance between the two pin shafts is increased, in the moving process of the carrier plate, the carrier plate drives the two needle heads to move in the direction away from each other through the linkage assembly, so that the two needle heads correspond to the corresponding pin shafts, and the corresponding efficiency of the needle heads and the pin shafts is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automatic chain production equipment, and in particular to an automatic chain cutting device. Background Art

[0002] like Figure 1 As shown, a transmission chain is a mechanical element used to transmit power and motion. It consists of a series of interconnected links that can be bent around two or more wheels (sprockets). The main function of a transmission chain is to transmit rotational motion from one sprocket to another while transmitting torque. Transmission chains are widely used in various mechanical equipment, including bicycles, motorcycles, automobiles, industrial machinery, etc. According to actual needs, the paired pins on the chain plates are removed and the long chain is cut into sections of finished short chains that meet the requirements.

[0003] For example, the patent with authorization announcement number CN203003451U, an automatic chain length disassembly device, includes a detection platform, a chain guide rail is arranged on the detection platform, a sensor is arranged on the chain guide rail, the sensor is connected to the PLC control system, the PLC control system is connected to the hydraulic disassembler and the servo motor, the servo motor is connected to the reducer, the reducer is connected to the sprocket, and the sprocket drives the chain to move in the chain guide rail. The PLC control system uses the sensor to accurately position the chain and then uses the hydraulic disassembler to cut the chain at the predetermined position. The manual operation is replaced by automatic control, which improves production efficiency and reduces labor costs. For roller chains of different models, the existing automatic chain cutting equipment can also obtain the model of the chain to be processed by manual input or automatic sensor recognition, and obtain the designed spacing of the paired pins, so as to adjust the spacing between the two needles of the automatic chain cutting equipment to complete the process of pressing and extruding the pins and cutting the chain. However, due to the influence of processing and assembly processes, the actual spacing between pairs of pins on a single chain plate of different chain models is not the same. The existing automatic chain cutting equipment lacks a device for fine-tuning the spacing between the two needles according to the actual spacing to complete the process of pressing and extruding the pins. Summary of the invention

[0004] The purpose of the present application is to provide an automatic chain cutting device, in order to fine-tune the needle spacing according to the actual spacing between paired pins at the current cutting position, so that the needle and the pin are more accurately aligned.

[0005] An automatic chain cutting device provided in the present application adopts the following technical solution: it includes a workbench, two limit plates are arranged at intervals on the workbench, a slide groove is formed between the two limit plates, the workbench is provided with a drop groove connected to the slide groove, the drop groove is used for the pin shaft to pass through, the workbench is slidably connected with a carrier plate, the workbench is connected with a first driving member for driving the carrier plate to slide in a direction close to or away from the limit plate, the workbench is slidably connected with a mounting plate, the workbench is connected with a second driving member for driving the mounting plate to slide in a direction close to or away from the workbench, the mounting plate is slidably connected with two needles, a linkage assembly is connected between the mounting plate and the carrier plate, and the carrier plate drives the two needles to slide in a direction close to or away from each other through the linkage assembly.

[0006] By adopting the above technical solution, when the chain stops moving, the first driving member drives the carrier plate to slide in the direction close to the limit plate. When the distance between the two pins increases, the carrier plate drives the two needles to move away from each other through the linkage assembly during the movement of the carrier plate, so that the two needles correspond to the corresponding pins; when the distance between the two pins decreases, the carrier plate drives the two needles to move in the direction close to each other through the linkage assembly during the movement of the carrier plate, so that the two needles correspond to the corresponding pins, thereby improving the efficiency of the correspondence between the needles and the pins. After the correspondence between the needles and the pins is completed, the second driving member drives the mounting plate to slide in the direction close to the workbench, and the two needles move with the movement of the mounting plate. The needles abut against the pins and drive the pins to detach from the chain, making it easy to disassemble the chain.

[0007] Optionally, the linkage assembly includes a plurality of first elastic members, two connecting blocks slidably connected to the carrier plate, a positioning block connected to each of the connecting blocks, two active rods connected to the connecting blocks, and a passive rod connected to each of the needles, one end of the first elastic member is connected to the connecting block, and the other end is connected to the carrier plate, the passive rod is located between the two active rods, each of the active rods is provided with an active part, and the distance between the two active parts decreases step by step toward the direction approaching the active rod, and each of the positioning blocks is provided with two positioning parts, and the distance between the two positioning parts decreases step by step toward the direction approaching the positioning block.

[0008] By adopting the above technical solution, the distance between the two pins increases. When the carrier plate moves toward the direction of the chain, the pin abuts against the positioning part and drives the positioning block and the connecting block to move. The first elastic member is compressed to produce elastic deformation and maintain the tendency of elastic reset. The two active rods move with the movement of the connecting block, so that the distance between the passive rod and the two active parts changes. The second driving member drives the mounting plate to slide in the direction close to the workbench, and the passive rod abuts against the active part of one of the active rods. The active part and the active rod drive the passive rod to slide, thereby increasing the distance between the two needles, so that the needles accurately correspond to the two pins with a larger spacing. The adjustment of the distance between the two needles is linked together by the active rod, the passive rod, the connecting block and the positioning block, reducing the drive and increasing the correlation. When the carrier plate moves in the direction away from the chain, the positioning part is separated from the pin, the first elastic member is elastically reset, and the first elastic member forces the connecting block to reset, that is, the passive rod and the two active rods are reset, reducing the distance between the two needles, so that the needles correspond to the two pins with a smaller spacing.

[0009] Optionally, the positioning block is slidably connected to the connecting block, the positioning block and the connecting block are connected via a second elastic member, the connecting block is connected to a stop assembly, and the positioning block limits the sliding of the connecting block via the stop assembly.

[0010] By adopting the above technical solution, when the pin shaft abuts against the positioning part, the positioning block slides in the direction close to the second elastic member, the second elastic member is compressed to produce elastic deformation and maintain a tendency of elastic reset, during the movement of the positioning block, the connecting block moves, the first elastic member is compressed to produce elastic deformation and maintain a tendency of elastic reset, when the connecting block moves to the corresponding position, the positioning block limits the sliding of the connecting block through the stop assembly, so that the two positioning blocks maintain a certain distance, that is, the two needles maintain a certain distance, which is convenient for the two needles to disassemble the same type of chain.

[0011] Optionally, the stop assembly includes a button connected to the connecting block, a magnetic part slidably connected to the connecting block, an electromagnet connected to the connecting block and a third elastic part connected to the magnetic part, the third elastic part is connected to the connecting block at one end away from the magnetic part, the button is electrically connected to the electromagnet, the electromagnet is magnetically attracted to the magnetic part, and the carrier plate is provided with a plurality of grooves for the magnetic part to be inserted.

[0012] By adopting the above technical solution, when the pin shaft abuts against the positioning part, the magnetic part is stuck in the groove, and the magnetic part limits the sliding of the connecting block. During the sliding process of the positioning block, the positioning block abuts against the button, the electromagnet is magnetized, the electromagnet and the magnetic part are magnetically attracted, and the magnetic part slides in the direction close to the electromagnet. The third elastic part is compressed to produce elastic deformation and maintain the tendency of elastic reset, so that the magnetic part is separated from the groove. The pin shaft applies force to the positioning part, the positioning block and the connecting block move, and the magnetic part corresponds to another groove. Due to the movement of the positioning block, the pin shaft is offset from the positioning part, the second elastic part is elastically reset, the positioning block is separated from the button, the electromagnet loses magnetism, and the third elastic part is elastically reset, so that the magnetic part is stuck in the corresponding groove, so that the magnetic part limits the movement of the connecting block, that is, limits the movement of the passive rod, the active rod and the needle, which is convenient for the two needles to disassemble the same type of chain.

[0013] Optionally, the connecting block is provided with a receiving groove for slidingly cooperating with the positioning block, the positioning block is provided with a guide block, and the connecting block is provided with a guide groove for slidingly cooperating with the guide block, and the guide groove is connected to the receiving groove.

[0014] By adopting the above technical solution, during the sliding process of the positioning block, the guide block slides along the guide groove, and the sliding cooperation between the guide block and the guide groove plays a guiding and limiting role in the sliding of the positioning block, thereby improving the sliding stability of the positioning block and preventing the positioning block from falling out of the accommodating groove during the sliding process.

[0015] Optionally, the carrier plate is provided with a receiving cavity for slidingly cooperating with the connecting block, a first giving way groove for slidingly cooperating with the positioning block and a second giving way groove for slidingly cooperating with the active rod, and the first giving way groove and the second giving way groove are both connected to the receiving cavity.

[0016] By adopting the above technical scheme, the sliding cooperation between the connecting block and the accommodating cavity, the sliding cooperation between the positioning block and the first clearance groove, and the sliding cooperation between the active rod and the second clearance groove guide and limit the sliding of the connecting block, thereby improving the sliding stability of the connecting block and preventing the connecting block from rotating during the sliding process, which not only enables the positioning block to clamp the chain better, but also prevents the first elastic member from twisting, thereby protecting the first elastic member.

[0017] Optionally, the mounting plate is provided with a mounting groove for slidingly cooperating with the passive rod and a channel for slidingly cooperating with the needle, the mounting groove is connected to the channel, and the mounting plate is connected with a fixing component for fixing the passive rod.

[0018] By adopting the above technical solution, when the passive rod and the needle slide, the sliding cooperation between the passive rod and the installation groove guides and limits the sliding of the passive rod, thereby improving the sliding stability of the passive rod, and the sliding cooperation between the needle and the channel guides and limits the sliding of the needle, thereby improving the sliding stability of the needle, so that the passive rod and the needle move to the corresponding position. After the passive rod moves to the corresponding position, the fixing assembly fixes the passive rod to prevent the passive rod from moving, improves the stability of the needle placement, and facilitates the needle to abut against the pin and drive the pin to separate from the chain.

[0019] Optionally, the fixing assembly includes a plurality of fixing columns slidably connected to the mounting plate and a fourth elastic member connected to each of the fixing columns, wherein one end of the fourth elastic member away from the fixing column is connected to the mounting plate, and the passive rod is provided with a fixing groove for the fixing column to be snapped into, and when the magnetic member is snapped into one of the grooves, one of the fixing columns is snapped into the fixing groove.

[0020] By adopting the above technical solution, when one of the fixed columns is inserted into the fixed groove, the outer surface of the fixed column fits with the inner wall of the fixed groove, and the fixed column restricts the movement of the active rod. During the movement, the active rod drives the passive rod and the needle to move synchronously. When the active rod stops moving, the passive rod and the needle also stop moving. At this time, one of the fixed columns is inserted into the fixed groove, thereby improving the stability of the placement of the passive rod and the needle, making it easier for the needle to abut against the pin and drive the pin to detach from the chain.

[0021] Optionally, one end of the fixing column away from the fourth elastic member is in an arc shape.

[0022] By adopting the above technical solution, when the passive rod moves, the fixed column with an arc-shaped end can be more easily separated from the fixed groove, thereby improving the efficiency of the passive rod shifting.

[0023] Optionally, the workbench is slidably connected to a clamping plate, and the workbench is connected to a third driving member for driving the clamping plate to slide in a direction close to or away from the carrier plate.

[0024] By adopting the above technical solution, when the chain stops moving, the first driving member drives the carrier plate to slide toward the clamping plate, and the third driving member drives the clamping plate to slide toward the carrier plate, so that the chain is clamped by the positioning block and the clamping block, thereby improving the stability of the chain placed on the workbench, that is, improving the effect of the needle abutting against the pin shaft and driving the pin shaft to separate from the chain.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the distance between the two pins increases, the carrier plate drives the two needles to move away from each other through the linkage assembly during the movement of the carrier plate, so that the two needles correspond to the corresponding pins; when the distance between the two pins decreases, the carrier plate drives the two needles to move toward each other through the linkage assembly during the movement of the carrier plate, so that the two needles correspond to the corresponding pins, thereby improving the efficiency of the correspondence between the needles and the pins.

[0026] 2. The second driving member drives the mounting plate to slide toward the workbench, and the passive rod abuts against the active part of one of the active rods. The active part and the active rod drive the passive rod to slide, thereby increasing the distance between the two needles, so that the needles accurately correspond to the two pins with larger spacing. The adjustment of the distance between the two needles is linked together by the active rod, the passive rod, the connecting block and the positioning block, reducing the drive and increasing the correlation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the chain.

[0028] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 3 It is one of the cross-sectional views of an embodiment of the present application, showing a slide groove.

[0030] Figure 4 yes Figure 3 A magnified image of area A.

[0031] Figure 5 This is the second cross-sectional view of the embodiment of the present application, showing the active rod.

[0032] Figure 6 yes Figure 5 Magnified view of area B.

[0033] Figure 7 This is the third cross-sectional view of the embodiment of the present application, showing the passive rod.

[0034] Figure 8 yes Figure 7 Magnified view of region C.

[0035] Fig. 9 This is the fourth cross-sectional view of the embodiment of the present application, showing a button.

[0036] Fig.10 yes Fig. 9 Magnified view of area D.

[0037] Description of the accompanying drawings: 1. workbench; 11. limit plate; 111. slide groove; 112. through groove; 12. sprocket; 13. first driving member; 14. third driving member; 15. bracket; 151. second driving member; 2. carrier plate; 21. accommodating cavity; 22. first clearance groove; 23. second clearance groove; 24. groove; 3. clamping plate; 4. mounting plate; 41. mounting groove; 42. channel; 43. slide cavity; 5. needle; 6. linkage assembly; 61. first elastic Part; 62, connecting block; 621, accommodating groove; 622, guide groove; 623, empty groove; 63, positioning block; 631, positioning part; 632, positioning groove; 633, guide block; 64, active rod; 641, active part; 65, passive rod; 651, fixing groove; 7, fixing assembly; 71, fixing column; 72, fourth elastic member; 8, second elastic member; 9, stop assembly; 91, third elastic member; 92, button; 93, magnetic member; 94, electromagnet. DETAILED DESCRIPTION

[0038] The following is combined with Figure 2 -Attached Fig.10 This application is described in further detail.

[0039] The embodiment of the present application discloses an automatic chain cutting device.

[0040] like Figure 2 As shown, it includes a workbench 1, and two limit plates 11 are relatively fixedly connected to the upper surface of the workbench 1, and a slide groove 111 is formed between the two limit plates 11, and the chain slides along the extension direction of the slide groove 111. The workbench 1 is rotatably connected to a sprocket 12, and the workbench 1 is fixedly connected to a rotating motor (not shown in the drawings), and the rotating motor is externally connected to a controller (not shown in the drawings), and the signal output end of the controller is connected to the signal input end of the rotating motor, and the end of the sprocket 12 close to the rotating motor is fixedly connected to the output end of the rotating motor. The workbench 1 is provided with a drop groove (not shown in the drawings) connected to the slide groove 111, and the pin shaft of the chain can fall out of the drop groove.

[0041] Combination Figure 2 and Figure 3As shown, both limit plates 11 are provided with through slots 112 connected to the slide slots 111, and the two through slots 112 are arranged opposite to each other. One of the through slots 112 is slidably connected to the carrier plate 2, and the workbench 1 is fixedly connected to the first driving member 13 for driving the carrier plate 2 to slide in the direction close to or away from the limit plate 11. The first driving member 13 is a cylinder, and the signal output end of the controller is connected to the signal input end of the first driving member 13, and the side of the carrier plate 2 close to the first driving member 13 is fixedly connected to the output end of the first driving member 13. The other through slot 112 is slidably connected to the clamping plate 3, and the workbench 1 is fixedly connected to the third driving member 14 for driving the clamping plate 3 to slide in the direction close to or away from the carrier plate 2. The third driving member 14 is a cylinder, and the signal output end of the controller is connected to the signal input end of the third driving member 14, and the side of the clamping plate 3 close to the third driving member 14 is fixedly connected to the output end of the third driving member 14. The workbench 1 is fixedly connected to a bracket 15, and the bracket 15 is slidably connected to a mounting plate 4. The bracket 15 is fixedly connected to a second driving member 151 for driving the mounting plate 4 to slide toward or away from the workbench 1. The second driving member 151 is a cylinder. The signal output end of the controller is connected to the signal input end of the second driving member 151, and the side of the mounting plate 4 close to the second driving member 151 is fixedly connected to the output end of the second driving member 151.

[0042] Combination Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the mounting plate 4 is relatively slidably connected to two needles 5, and a linkage assembly 6 is connected between the mounting plate 4 and the carrier plate 2, and the linkage assembly 6 is used to drive the two needles 5 to slide in the direction of approaching or moving away from each other. The linkage assembly 6 includes a plurality of first elastic members 61, two connecting blocks 62 relatively slidably connected to the carrier plate 2, a positioning block 63 slidably connected to each connecting block 62, two active rods 64 relatively spaced and fixedly connected to the connecting block 62, and a passive rod 65 fixedly connected to each needle 5. The carrier plate 2 is provided with an accommodating cavity 21 for slidably cooperating with the corresponding connecting block 62, a first clearance groove 22 for slidably cooperating with the corresponding positioning block 63, and a second clearance groove 23 for slidably cooperating with the two active rods 64, and the first clearance groove 22 and the second clearance groove 23 are both connected to the accommodating cavity 21. One connection block 62 corresponds to two first elastic members 61, the first elastic member 61 is a spring, and the two first elastic members 61 are respectively located on opposite sides of the connection block 62, one end of the first elastic member 61 is fixedly connected to the connection block 62, and the other end is fixedly connected to the inner wall of one side of the accommodating cavity 21. An active portion 641 is provided at one end of each active rod 64 away from the connection block 62, and the active portion 641 is integrally formed with the active rod 64, and the distance between the two active portions 641 gradually decreases toward the direction close to the active rod 64, and the passive rod 65 is located between the two active rods 64, and the opposite sides of the passive rod 65 are respectively in contact with the opposite sides of the two active rods 64.

[0043] like Figure 8 As shown, the mounting plate 4 is provided with an avoidance groove for the active rod 64 to pass through, the mounting plate 4 is provided with a mounting groove 41 for slidingly cooperating with the passive rod 65, the mounting plate 4 is provided with a channel 42 for slidingly cooperating with the needle 5, and the mounting groove 41 is communicated with the channel 42. The mounting plate 4 is connected with a fixing assembly 7 for fixing the passive rod 65, the fixing assembly 7 includes six fixing columns 71 that are slidingly connected to the mounting plate 4 at intervals and a fourth elastic member 72 that is fixedly connected to each fixing column 71, and one passive rod 65 corresponds to three fixing columns 71. The mounting plate 4 is provided with a sliding cavity 43 for slidingly cooperating with the corresponding fixing column 71, the sliding cavity 43 is communicated with the mounting groove 41, the fourth elastic member 72 is a spring, and one end of the fourth elastic member 72 away from the fixing column 71 is fixedly connected to the inner wall of the sliding cavity 43, and one end of the fixing column 71 away from the fourth elastic member 72 is in an arc shape, and a fixing groove 651 for the fixing column 71 to be inserted is provided on the side of the passive rod 65 close to the fixing column 71.

[0044] Combination Figure 4 , Fig. 9 and Fig.10As shown, two positioning parts 631 are arranged opposite to each other on one side of each positioning block 63 away from the connecting block 62. The positioning parts 631 are formed integrally with the positioning block 63. The distance between the two positioning parts 631 decreases step by step toward the direction close to the positioning block 63. A positioning groove 632 is formed between the two positioning parts 631. The connecting block 62 is provided with a receiving groove 621 for slidingly cooperating with the positioning block 63. The positioning block 63 is provided with two guide blocks 633 opposite to each other. The guide blocks 633 are formed integrally with the positioning block 63. The connecting block 62 is provided with a guide groove 622 for slidingly cooperating with the guide blocks 633. The guide groove 622 is connected with the receiving groove 621. The positioning block 63 is connected to the connecting block 62 through a plurality of second elastic members 8. The second elastic member 8 is a spring. One end of the second elastic member 8 is fixedly connected to the positioning block 63, and the other end is fixedly connected to the inner wall of the receiving groove 621. The connection block 62 is connected to a stop assembly 9, which includes a third elastic member 91, a button 92 fixedly connected to the connection block 62, a magnetic member 93 slidably connected to the connection block 62, and an electromagnet 94 fixedly connected to the connection block 62. The connection block 62 is provided with an empty slot 623, and the electromagnet 94 is fixedly connected to the inner wall of the empty slot 623. The magnetic member 93 is an iron block, and the third elastic member 91 is a spring. The two ends of the third elastic member 91 are respectively fixedly connected to the magnetic member 93 and the inner wall of one side of the empty slot 623. The button 92 is electrically connected to the electromagnet 94, and the electromagnet 94 is magnetically attracted to the magnetic member 93. The carrier plate 2 is provided with a plurality of grooves 24 for the magnetic member 93 to be inserted at intervals, and the grooves 24 are connected to the receiving groove 621. When the magnetic member 93 is inserted into one of the grooves 24, one of the fixing columns 71 is inserted into the fixing groove 651. The working principle of the electromagnet 94 is to generate a magnetic field by powering on, and the magnetic field disappears when the power is off. When the positioning block 63 contacts the button 92, the circuit is closed, current passes through the coil of the electromagnet 94, a magnetic field is generated, and the electromagnet 94 is magnetized. When the positioning block 63 is separated from the button 92, the circuit is disconnected, the current stops, the magnetic field disappears, and the electromagnet 94 loses magnetism.

[0045] The implementation principle of an automatic chain cutting device in the embodiment of the present application is: When the chain stops rotating, the first driving member 13 drives the carrier plate 2 to slide in the direction close to the clamping plate 3, and the third driving member 14 drives the clamping plate 3 to slide in the direction close to the carrier plate 2. The pin abuts against the positioning portion 631. Since the magnetic member 93 is stuck in the groove 24, the magnetic member 93 restricts the connection block 62 from sliding. During the sliding process of the positioning block 63, the positioning block 63 abuts against the button 92, the electromagnet 94 is magnetized, and the electromagnet 94 and the magnetic member 93 are magnetically attracted. The magnetic member 93 slides in the direction close to the electromagnet 94, and the third elastic member 91 is compressed to produce elastic deformation and maintain the tendency of elastic reset, so that the magnetic member 93 is separated from the groove 24. The pin applies force to the positioning portion 631, the positioning block 63 and the connection block 62 move, and the magnetic member 93 corresponds to another groove 24. As the positioning block 63 moves, the pin shaft and the positioning portion 631 are offset, the second elastic member 8 is elastically reset, the positioning block 63 is separated from the button 92, the electromagnet 94 loses magnetism, and the third elastic member 91 is elastically reset, so that the magnetic member 93 is stuck in the corresponding groove 24, so that the magnetic member 93 limits the movement of the connecting block 62, that is, limits the movement of the passive rod 65, the active rod 64 and the needle 5, which is convenient for the two needles 5 to disassemble the same type of chain.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A chain automatic cutting device, characterized in that: The invention comprises a workbench (1), wherein two limit plates (11) are arranged at intervals, a slide groove (111) is formed between the two limit plates (11), the workbench (1) is provided with a drop groove connected to the slide groove (111), the drop groove is used for a pin shaft to pass through, the workbench (1) is slidably connected to a carrier plate (2), the workbench (1) is connected to a first driving member (13) for driving the carrier plate (2) to slide in a direction approaching or away from the limit plates (11), the workbench (1) is slidably connected to a mounting plate (4), the workbench (1) is connected to a second driving member (151) for driving the mounting plate (4) to slide in a direction approaching or away from the workbench (1), the mounting plate (4) is slidably connected to two needles (5), a linkage assembly (6) is connected between the mounting plate (4) and the carrier plate (2), and the carrier plate (2) drives the two needles (5) to slide in a direction approaching or away from each other through the linkage assembly (6).

2. The automatic chain cutting device according to claim 1, characterized in that: The linkage assembly (6) comprises a plurality of first elastic members (61), two connecting blocks (62) slidably connected to the carrier plate (2), a positioning block (63) connected to each of the connecting blocks (62), two active rods (64) connected to the connecting blocks (62), and a passive rod (65) connected to each of the needles (5), one end of the first elastic member (61) is connected to the connecting block (62), and the other end is connected to the carrier plate (2), the passive rod (65) is located between the two active rods (64), each of the active rods (64) is provided with an active portion (641), and the distance between the two active portions (641) decreases step by step in a direction approaching the active rod (64), and each of the positioning blocks (63) is provided with two positioning portions (631), and the distance between the two positioning portions (631) decreases step by step in a direction approaching the positioning block (63).

3. The automatic chain cutting device according to claim 2, characterized in that: The positioning block (63) is slidably connected to the connecting block (62); the positioning block (63) and the connecting block (62) are connected via a second elastic member (8); the connecting block (62) is connected to a stop assembly (9); and the positioning block (63) limits the sliding of the connecting block (62) via the stop assembly (9).

4. The automatic chain cutting device according to claim 3, characterized in that: The stop assembly (9) comprises a button (92) connected to the connection block (62), a magnetic member (93) slidably connected to the connection block (62), an electromagnet (94) connected to the connection block (62), and a third elastic member (91) connected to the magnetic member (93); one end of the third elastic member (91) away from the magnetic member (93) is connected to the connection block (62); the button (92) is electrically connected to the electromagnet (94); the electromagnet (94) is magnetically attracted to the magnetic member (93); and the carrier plate (2) is provided with a plurality of grooves (24) for the magnetic member (93) to be inserted into.

5. The automatic chain cutting device according to claim 2, characterized in that: The connecting block (62) is provided with a receiving groove (621) for slidingly cooperating with the positioning block (63), the positioning block (63) is provided with a guide block (633), the connecting block (62) is provided with a guide groove (622) for slidingly cooperating with the guide block (633), and the guide groove (622) is communicated with the receiving groove (621).

6. The automatic chain cutting device according to claim 2, characterized in that: The carrier plate (2) is provided with a receiving cavity (21) for slidingly cooperating with the connecting block (62), a first clearance groove (22) for slidingly cooperating with the positioning block (63), and a second clearance groove (23) for slidingly cooperating with the active rod (64); the first clearance groove (22) and the second clearance groove (23) are both in communication with the receiving cavity (21).

7. The automatic chain cutting device according to claim 2, characterized in that: The mounting plate (4) is provided with a mounting groove (41) for slidingly cooperating with the passive rod (65) and a channel (42) for slidingly cooperating with the needle (5); the mounting groove (41) is communicated with the channel (42); and the mounting plate (4) is connected to a fixing component (7) for fixing the passive rod (65).

8. The automatic chain cutting device according to claim 7, characterized in that: The fixing assembly (7) comprises a plurality of fixing posts (71) slidably connected to the mounting plate (4) and a fourth elastic member (72) connected to each of the fixing posts (71); one end of the fourth elastic member (72) away from the fixing post (71) is connected to the mounting plate (4); the passive rod (65) is provided with a fixing groove (651) for the fixing post (71) to be snapped into; when the magnetic member (93) is snapped into one of the grooves (24), one of the fixing posts (71) is snapped into the fixing groove (651).

9. The automatic chain cutting device according to claim 8, characterized in that: One end of the fixing column (71) away from the fourth elastic member (72) is in the shape of an arc surface.

10. The automatic chain cutting device according to claim 1, characterized in that: The workbench (1) is slidably connected to a clamping plate (3), and the workbench (1) is connected to a third driving member (14) for driving the clamping plate (3) to slide in a direction approaching or away from the carrier plate (2).

Images