A torsion spring tightening assembly mechanism

Abstract

The invention discloses a torsion spring tightening and assembling mechanism, which belongs to the technical field of torsion spring assembly. The invention designs a material taking rod (9), a limit rod (10), a push pin (11), and a magnet (20) below a material taking seat (8), and combines the rotating and lifting cylinders to realize the automatic material taking and automatic installation and tightening operations of the torsion spring, thereby saving manpower and material resources, improving production efficiency, having broad application prospects and strong practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of torsion spring assembly, and in particular relates to a torsion spring tightening and assembling mechanism. Background Art

[0002] Torsion spring is a commonly used elastic element, which is widely used in mechanical manufacturing, vehicles and other fields.

[0003] At present, the assembly of torsion springs is mainly completed manually. The assembly action is complicated and time-consuming. When responding to a large number of orders, a large amount of manpower is required to cope with this highly repetitive work. It not only consumes a lot of manpower, but also has low efficiency and it is difficult to ensure the consistency of assembly. Due to the small size of the torsion spring itself and its easy deformation, problems such as jamming, missing installation and incomplete assembly are prone to occur during installation. Automated assembly is difficult and it is difficult to achieve high-precision automated assembly of torsion springs.

[0004] Existing patent document CN212793812U discloses a torsion spring threading mechanism, such as Figure 1 、 Figure 2 As shown, the torsion spring loading clamp 8' uses the first clamping block protrusion 12' of the first clamping block 9' and the second clamping block blocking rod 13' of the second clamping block 10' to clamp the existing torsion spring 1'. Combined with the torsion spring body accommodating cavity 11', which accommodates the torsion spring body 2', this mechanism enables automated loading and transfer of the torsion spring to the next torsion spring fixing clamp delivered by the torsion spring assembly line. However, in this mechanism, the torsion spring must first be placed on the hook 6' and extension leg 5' of the torsion handle 7', aligning the existing torsion spring 1' in an upright position, before the torsion spring loading clamp 8' can be used for loading and other operations. This results in a complex structure and cumbersome operation. Furthermore, the first clamping block protrusion 12' and the second clamping block blocking rod 13' can easily deform the first torsion leg 3' and the second torsion leg 4' of the existing torsion spring 1', hindering subsequent installation and fixing operations. This results in significant torsion spring loss, low efficiency, and difficult assembly. Summary of the Invention

[0005] In order to solve the above problems, the present invention discloses a torsion spring tightening and assembly mechanism, which does not require manual operation throughout the process and does not require the torsion spring to be placed in a vertical state. It can not only quickly and accurately perform automatic torsion spring loading, but also realize the subsequent separation, positioning and assembly of the torsion spring onto the cylinder of the product to be installed with the torsion spring or into the torsion spring positioning slot. The entire process is automated, saving time and labor, greatly improving efficiency, and greatly reducing the possibility of torsion spring deformation, thereby reducing manufacturing costs.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A torsion spring tightening assembly mechanism includes a lifting cylinder mounting plate, a limit block, a connecting shaft, a connecting rod, a guide rod, a material picking seat, a material picking rod, a limit rod, a pin, a limit pin, a lower fixed plate, a fixed seat, a limit seat, a pinning rod, a robot connecting plate, a pinning spring, a material picking rod spring, a lifting cylinder, a rotating cylinder and a magnetic metal block. The lifting cylinder mounting plate is detachably mounted on the lifting cylinder mounting plate, and the rotating cylinder is detachably mounted on the lower side. A lifting cylinder connecting shaft is provided in the middle of the lower end of the lifting cylinder, a mounting through hole is provided in the middle of the lifting cylinder mounting plate, a first connecting rod mounting hole is provided in the middle of the rotating cylinder, a second connecting rod mounting hole is provided in the middle of the robot connecting plate, a third connecting rod mounting hole is provided in the middle of the fixing seat, and the upper end of the connecting rod passes through the connecting rod in sequence After the third mounting hole, the second mounting hole of the connecting rod, and the first mounting hole of the connecting rod are detachably installed and connected with the lifting cylinder connecting shaft passing through the mounting through hole, the fixing seat is detachably installed and fixedly connected to the bottom of the robot connecting plate, the limit block is installed under the fixing seat and is located on one side of the connecting rod, the interior of the shift rod is hollow, and the upper end is detachably fixedly connected to the side of the fixing seat and is located under the robot connecting plate, and a pull pin mounting hole is formed at the bottom of the lower end, the pull pin spring and the pull pin are sequentially installed in the shift rod through the pull pin mounting hole and fixed with a pin, and the two ends of the upper surface of the lower fixing plate are fixedly connected to the bottom of the robot connecting plate through the connecting shaft and are located at the On one side, the material picking seat is a cylindrical stepped structure with an open lower end and a hollow interior, a fourth mounting hole of a connecting rod is provided on the upper portion, an insertion hole of a material picking seat body is provided in the middle of the lower fixing plate, a spring mounting countersunk hole is provided on the upper end of the material picking seat, the upper end of the material picking seat passes through the insertion hole of the material picking seat body until the lower end of the connecting rod is inserted into the fourth mounting hole of the connecting rod, and the material picking rod spring and the material picking rod are sequentially installed in the lower opening, the upper end of the material picking rod spring is connected to the lower end of the connecting rod located in the material picking seat, and the lower end is inserted into the spring mounting countersunk hole, the limit pin is L-shaped, and consists of an upper pin shaft and a side pin shaft, and the upper pin shaft and the side pin shaft are perpendicular to each other, the limit seat can be detachably mounted above the lower fixing plate, and Located on one side of the material picking seat, the upper pin shaft is installed on the limit seat and can move up and down so that the end can contact / move away from the side of the limit block. The side pin shaft passes through the first side pin shaft insertion hole opened on the side of the material picking seat and the second side pin shaft insertion hole opened on the side of the material picking rod in sequence. The bottom of the material picking seat is provided with evenly spaced mounting grooves, and each mounting groove is embedded with the magnetic metal block. The limit rod is detachably mounted on the lower surface of the lower fixed plate, and the push pin is respectively used to position the two torsion feet of the torsion spring. The guide rod is detachably mounted on the lower surface of the lower fixed plate, and is close to the guide rod guide groove preset on the outer peripheral surface of the material picking seat, so as to guide the material picking seat to always keep moving in the vertical direction.

[0008] As a further improvement of the present invention, the first insertion hole of the side pin shaft, the second insertion hole of the side pin shaft, the pin pulling connection hole and the upper pin shaft placement groove are all vertically elliptical in shape.

[0009] As a further improvement of the present invention, the magnetic metal block is a magnet.

[0010] As a further improvement of the present invention, the torsion spring tightening assembly mechanism further includes a pad, which is detachably mounted between the lifting cylinder mounting plate and the rotating cylinder.

[0011] As a further improvement of the present invention, the detachable manner is all bolt / screw connection.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The present invention realizes the automatic material taking and automatic installation and tightening of torsion springs by combining the material taking rod, the limit rod, the detent pin and the magnet under the material taking seat with the rotating and lifting cylinders, thus saving manpower and material resources and improving production efficiency.

[0014] 2. The present invention realizes accurate positioning of the torsion spring through the material taking rod, the limiting rod and the detent pin, does not cause damage to the torsion spring, reduces the breakage rate and deformation of the torsion spring, and saves operation costs.

[0015] 3. The torsion spring tightening assembly mechanism of the present invention has a simple internal structure and is a mechanical linkage mechanism. The connection method is detachable, which is convenient for maintenance and installation, and has high structural stability.

[0016] 4. The present invention can be integrally installed on a transplanting assembly or a robot through a robot connecting plate, and can quickly realize automatic assembly of torsion springs, thereby reducing labor costs and improving production efficiency.

[0017] In short, the torsion spring tightening and assembly mechanism of the present invention does not require manual operation throughout the entire process, and there is no need to place the torsion spring in a vertical state. It can not only quickly and accurately perform automatic torsion spring loading, but also realize the subsequent separation, positioning and assembly of the torsion spring onto the cylinder of the product to be installed with the torsion spring or into the torsion spring positioning slot. The entire process is automated, saving time and effort, greatly improving efficiency, and greatly reducing the possibility of torsion spring deformation, thereby reducing manufacturing costs, having broad application prospects, and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shows a schematic structural diagram of the prior art torsion spring loading clamp;

[0019] Figure 2 Shows a schematic diagram of the structure of the prior art existing torsion spring and torsion handle after installation;

[0020] Figure 3Shows a schematic diagram of the overall structure of the torsion spring tightening assembly mechanism of the present invention;

[0021] Figure 4 for Figure 3 Bottom view of

[0022] Figure 5 for Figure 3 Another bottom view of

[0023] Figure 6 An exploded schematic diagram of the torsion spring tightening assembly mechanism of the present invention;

[0024] Figure 7 for Figure 6 Schematic diagram of the center lever;

[0025] Figure 8 for Figure 6 Schematic diagram of the structure of the deflector pin;

[0026] Figure 9 for Figure 6 Schematic diagram of the structure of the fixed seat;

[0027] Figure 10 for Figure 6 Schematic diagram of the structure of the connecting rod;

[0028] Figure 11 for Figure 6 Schematic diagram of the structure of the middle material taking seat;

[0029] Figure 12 for Figure 6 Schematic diagram of the structure of the feeding rod;

[0030] Figure 13 for Figure 6 Schematic diagram of the structure of the middle limit block;

[0031] Figure 14 for Figure 6 Middle limit seat;

[0032] Figure 15 for Figure 6 Schematic diagram of the structure of the limit pin;

[0033] Figure 16 for Figure 6 Schematic diagram of the structure of the middle limit rod;

[0034] Figure 17 for Figure 6 Schematic diagram of the structure of the guide rod;

[0035] Figure 18 for Figure 6 Schematic diagram of the structure of the middle and lower fixed plates;

[0036] Figure 19 for Figure 6 Front view after installation;

[0037] Figure 20 for Figure 19 Sectional view BB;

[0038] List of Figure Symbols:

[0039] 1. Torsion spring; 2. Spacer; 3. Lifting cylinder mounting plate; 3-1. Lifting cylinder coupling shaft mounting hole; 4. Stopper; 4-1. Upper pin limit surface; 4-2. Stopper fixing hole; 5. Connecting shaft; 6. Connecting rod; 6-1. Reclaimer connection end; 6-2. Cylinder connection end; 7. Guide rod; 7-1. Guide rod fixing hole; 7-2. Guide rod body; 8. Reclaimer; 8-1. Connecting rod fourth mounting hole; 8-2. Side pin first insertion hole; 8-3. Reclaimer base; 8-4. Guide rod guide slot; 8-5. Reclaimer body; 8-6. Mounting slot; 9. Feeding rod; 9-1. Feeding rod body; 9-2. Second insertion hole of side pin shaft; 9-3. Spring mounting countersunk hole; 10. Limiting rod; 10-1. Limiting rod body; 10-2. Limiting rod stopper; 11. Pulling pin; 11-1. Pulling pin stopper; 11-2. Pulling pin shaft; 11-3. Pulling pin connecting hole; 12. Limiting pin; 12-1. Upper pin shaft; 12-2. Side pin shaft; 13. Lower fixing plate; 13-1. Guide rod connecting hole; 13-2. Feeding seat body insertion hole; 13-3. Limiting rod connecting hole; 13-4. Connecting shaft connecting hole; 13-5. Limiting 14. Fixing seat; 14-1. Third mounting hole of connecting rod; 14-2. Fixing seat fixing hole; 14-3. Pull rod connection hole; 14-4. Fixing seat body; 15. Limiting seat; 15-1. Upper pin shaft installation hole; 15-2. Limiting seat body; 15-3. Upper pin shaft installation slot; 15-4. Limiting seat fixing hole; 15-5. Limiting seat base; 16. Push rod; 16-1. Pull pin installation hole; 16-2. Pull rod body; 16-3. Pull rod fixing hole; 16-4. Pull pin fixing hole; 17. Robot connecting plate; 17-1. Connecting plate The second mounting hole of the rod; 18, the pin pulling spring; 19, the material taking rod spring; 20, the magnet; 21, the lifting cylinder; 21-1, the lifting cylinder connecting shaft; 22, the rotating cylinder; 22-1, the first mounting hole of the connecting rod; 1', the existing torsion spring; 2', the torsion spring body; 3', the first torsion foot; 4', the second torsion foot; 5', the extension foot; 6', the hook head; 7', the torsion handle; 8', the torsion spring feeding clamp; 9', the first clamping block; 10', the second clamping block; 11', the torsion spring body accommodating cavity; 12', the first clamping block protrusion; 13', the second clamping block blocking rod. Implementation Method

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0041] like Figure 1-20 As shown, the torsion spring tightening assembly mechanism of the present invention includes a lifting cylinder mounting plate 3, a limit block 4, a connecting shaft 5, a connecting rod 6, a guide rod 7, a material picking seat 8, a material picking rod 9, a limit rod 10, a detent 11, a limit pin 12, a lower fixed plate 13, a fixed seat 14, a limit seat 15, a detent 16, a robot connecting plate 17, a detent spring 18, a material picking rod spring 19, a lifting cylinder 21, a rotary cylinder 22 and a magnetic metal block. The lifting cylinder mounting plate 3 has a lifting cylinder 21 detachably mounted on it, and a rotary cylinder 22 detachably mounted on it. The lifting cylinder 21 has a lifting cylinder 21 disposed in the middle of its lower end. The lowering cylinder connecting shaft 21-1, the lifting cylinder mounting plate 3 is provided with a mounting through hole 3-1 in the middle, the rotating cylinder 22 is provided with a connecting rod first mounting hole 22-1 in the middle, the robot connecting plate 17 is provided with a connecting rod second mounting hole 17-1 in the middle, the fixed seat 14 includes a fixed seat body 14-4, the fixed seat body 14-4 extends upward, and the middle part of the boss is provided in the connecting rod third mounting hole 14-1, and the third connecting rod mounting hole 14-1 is provided with a triangular symmetrical fixed seat fixing hole 14-2 around it, and the side of the fixed seat body 14-4 is provided with a pull rod connecting hole 14-3.

[0042] The connecting rod 6 is cylindrical and includes a material taking seat connecting end 6-1 and a cylinder connecting end 6-2.

[0043] After the cylinder connection end 6-2 of the connecting rod 6 passes through the third connecting rod mounting hole 14-1, the second connecting rod mounting hole 17-1, and the first connecting rod mounting hole 22-1 in sequence, and is detachably mounted and connected with the lifting cylinder connection shaft 21-1 passing through the mounting through hole 3-1, the fixing seat 14 is detachably mounted and fixed to the bottom of the robot connecting plate 17 through the fixing seat fixing hole 14-2. The limit block 4 is an arc-shaped block structure, the side of which is an upper pin shaft limiting surface 4-1, and a limit block fixing hole 4-2 is provided in the middle. The limit block 4 is installed below the fixing seat 14 through the limit block fixing hole 4-2 and is located on one side of the connecting rod 6. The interior of the pull rod 16 is hollow, and includes a pull rod body 16- 2. A pull pin mounting hole 16-1 is provided at the bottom of the pull rod body 16-2, a pull rod fixing hole 16-3 is provided on the side of the top end of the pull rod body 16-2, and two pull pin fixing holes 16-4 are provided on the front and rear sides of the pull rod body 16-2. The top end of the pull rod body 16-2 is detachably fixedly connected to the pull rod connecting hole 14-3 on the side of the fixing seat 14 through the pull rod fixing hole 16-3, and is located below the robot connecting plate 17. The pull pin spring 18 and the pull pin 11 are sequentially installed into the space inside the push rod 16 through the pull pin mounting hole 16-1, and the pull pin spring 18 and the pull pin 11 are positioned in the space inside the push rod 16 by inserting a fixing pin into the two pull pin fixing holes 16-4.

[0044] A material picking seat body insertion hole 13-2 is opened in the middle of the lower fixed plate 13, and a limit seat base mounting groove 13-5, a guide rod connecting hole 13-1, a limit rod connecting hole 13-3 and two connecting shaft connecting holes 13-4 are respectively provided around the material picking seat body insertion hole 13-2. The number of connecting shaft connecting holes 13-4 and connecting shafts 5 corresponds one to one.

[0045] The upper end of the connecting shaft 5 is connected to the robot connecting plate 17, and the lower end is connected to the connecting shaft connecting hole 13-4 of the lower fixed plate 13, and is located on one side of the shift rod 16. The material picking seat 8 is a cylindrical stepped structure with an open lower end and a hollow interior, including a material picking seat body 8-5 and a material picking seat base 8-3. The outer diameter of the material picking seat base 8-3 is larger than the material picking seat body 8-5. The top of the material picking seat body 8-5 is provided with a fourth connecting rod mounting hole 8-1, and the side is provided with a first side pin shaft insertion hole 8-2. The circumferential surface of the material picking seat base 8-3 is provided with a vertically concave guide rod guide groove 8-4, and a plurality of mounting grooves 8-6 are provided at equal intervals on the bottom annular surface of the material picking seat base 8-3, and each mounting groove 8-6 is embedded with the magnetic The magnetic metal block can be a magnet 20, the feeding rod 9 includes a feeding rod body 9-1, the side of the feeding rod body 9-1 is provided with a second insertion hole 9-2 for the side pin shaft, and the top is provided with a spring mounting countersunk hole 9-3, the feeding seat body 8-5 passes through the feeding seat body insertion hole 13-2, until the lower end of the connecting rod 6 is threadedly connected to the fourth mounting hole 8-1 of the connecting rod and penetrates into the feeding seat body 8-5, and the feeding seat base 8-3 is in contact with the lower surface of the lower fixed plate 13, the lower end opening of the feeding seat base 8-3 is sequentially installed with the feeding rod spring 19 and the feeding rod body 9-1, the upper end of the feeding rod spring 19 is connected to the feeding seat connection end 6-1 of the connecting rod 6 located in the feeding seat 8, The lower end is inserted into the spring mounting countersunk hole 9-3. The limit pin 12 is L-shaped and consists of an upper pin shaft 12-1 and a side pin shaft 12-2. The upper pin shaft 12-1 and the side pin shaft 12-2 are perpendicular to each other. The limit seat 15 includes a limit seat body 15-2 and a limit seat base 15-5. The upper end surface of the limit seat body 15-2 is provided with an upper pin shaft placement hole 15-1, and the side is provided with an upper pin shaft placement groove 15-3. The limit seat base 15-5 is provided with a limit seat fixing hole 15-4. Through the limit seat fixing hole 15-4, the limit seat 15 is detachably installed in the limit seat base mounting groove 13-5 of the lower fixed plate 13 and is located on one side of the material taking seat body 8-5. The upper pin shaft 12-1 is placed in the upper pin shaft placement groove 15- 3, and can move up and down in the upper pin shaft installation groove 15-3, and can extend / retract from the upper pin shaft installation hole 15-1. When extended, the end can contact the upper pin shaft limiting surface 4-1 of the limit block 4. The side pin shaft 12-2 passes through the first side pin shaft insertion hole 8-2 and the second side pin shaft insertion hole 9-2 in sequence. The limit rod 10 includes a limit rod body 10-1 and a limit rod stopper 10-2. The upper end of the limit rod body 10-1 is connected to the bottom of the lower fixed plate 13 through the limit rod connecting hole 13-3. The limit rod stopper 10-2 is provided at the lower end of the limit rod body 10-1, and the detent pin 11 is used to position the two torsion feet of the torsion spring 1 respectively. The guide rod 7 includes a guide rod fixing hole 7-1 and a guide rod body 7-2.The guide rod fixing hole 7-1 is formed on the upper surface of the guide rod body 7-2. The guide rod 7 is detachably mounted on the guide rod connecting hole 13-1 of the lower fixing plate 13 through the guide rod fixing hole 7-1, and is closely attached to the inner surface of the guide rod guide groove 8-4, so as to guide the material picking seat 8 to always move in the vertical direction.

[0046] The torsion spring tightening assembly mechanism also includes a pad 2, which is detachably mounted between the lifting cylinder mounting plate 3 and the rotating cylinder 22 to avoid wear between the lifting cylinder mounting plate 3 and the rotating cylinder 22 and improve the overall life of the mechanism.

[0047] All of the above-mentioned detachable methods are bolt / screw connections.

[0048] The working process is as follows:

[0049] The lifting cylinder 21 starts and descends, driving the connecting rod 6 to descend, pushing the material picking seat 8 to move downward, compressing the material picking rod spring 19, driving the material picking rod 9 to move downward, and the side pin 12-2 located in the first insertion hole 8-2 of the side pin and the second insertion hole 9-2 of the side pin moves downward, and the upper pin 12-1 is separated from the upper pin limit surface 4-1.

[0050] The magnet 20 in the mounting groove 8-6 on the base 8-3 of the material picking seat sucks up the torsion spring 1, and the middle part is inserted into the lower end of the material picking rod body 9-1. At the same time, the rotary cylinder 22 rotates, so that the pin puller bar 11-1 and the limit bar bar 10-2 hook the two twisting feet of the torsion spring 1 at the same time, and the material is picked up successfully. At this time, the lifting cylinder and the rotating cylinder are stationary.

[0051] When it reaches the limit column or torsion spring positioning groove of the product to be installed, the torsion spring 1 is placed in the limit column or torsion spring positioning groove, and the rotating cylinder 22 rotates in the opposite direction to tighten the two torsion legs of the torsion spring 1 to the installation position corresponding to the product to be installed and reset. Then the lifting cylinder 21 drives the connecting rod 6 to move upward, and the material picking rod spring 19 resets, driving the upper pin shaft 12-1 to reset and stop at the upper pin shaft limit surface 4-1. The automatic material picking, installation and tightening of the entire torsion spring 1 are completed, and the entire torsion spring tightening assembly mechanism returns to the initial state and continues to enter the next cycle of picking, moving, assembling, tightening and resetting.

[0052] The beneficial effects of the present invention are as follows:

[0053] 1. The present invention realizes the automatic material taking and automatic installation and tightening of the torsion spring by combining the material taking rod 9, the limiting rod 10, the detent pin 11, the magnet 20 under the material taking seat 8, and the rotating and lifting cylinders, thereby saving manpower and material resources and improving production efficiency.

[0054] 2. The present invention realizes accurate positioning of the torsion spring through the material taking rod 9, the limiting rod 10 and the removing pin 11, does not cause damage to the torsion spring, reduces the breakage rate and deformation of the torsion spring, and saves operation costs.

[0055] 3. The torsion spring tightening assembly mechanism of the present invention has a simple internal structure and is a mechanical linkage mechanism. The connection method is detachable, which is convenient for maintenance and installation, and has high structural stability.

[0056] 4. During the whole process, the torsion spring 1 does not need to be placed vertically. The batch of torsion springs 1 can be directly placed in the box to be taken out, which saves time and effort, and has high material picking accuracy and greatly improved installation and tightening accuracy.

[0057] 5. The present invention can be integrally installed on a transplanting assembly or a robot through the robot connecting plate 17, and can quickly realize automatic assembly of torsion springs, thereby reducing labor costs and improving production efficiency.

[0058] In short, the torsion spring tightening and assembly mechanism of the present invention does not require manual operation throughout the entire process, and there is no need to place the torsion spring in a vertical state. It can not only quickly and accurately perform automatic torsion spring loading, but also realize the subsequent separation, positioning and assembly of the torsion spring onto the cylinder of the product to be installed with the torsion spring or tighten it in the torsion spring positioning slot. The entire process is automated, saving time and effort, greatly improving efficiency, and greatly reducing the possibility of torsion spring deformation, thereby reducing manufacturing costs, having broad application prospects, and strong practicality.

[0059] It should be noted that the above content merely illustrates the technical idea of the present invention and cannot be used to limit the scope of protection of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications all fall within the scope of protection of the claims of the present invention.

Claims

1. A torsion spring tightening assembly mechanism, characterized in that: The torsion spring tightening assembly mechanism comprises a lifting cylinder mounting plate (3), a limiting block (4), a connecting shaft (5), a connecting rod (6), a guide rod (7), a material picking seat (8), a material picking rod (9), a limiting rod (10), a deflecting pin (11), a limiting pin (12), a lower fixed plate (13), a fixed seat (14), a limiting seat (15), a deflecting rod (16), a robot connecting plate (17), a deflecting pin spring (18), a material picking rod spring (19), a lifting cylinder (21), a rotating cylinder (22) and a magnetic metal block. The lifting cylinder mounting plate (3) is detachably mounted on the upper surface of the lifting cylinder (21), and the rotating cylinder (22) is detachably mounted on the lower surface. A lifting cylinder connecting shaft (21-1) is provided at the middle portion of the lower end of the lifting cylinder (21). A mounting through hole (3-1) is provided in the middle of the mounting plate (3), a first mounting hole (22-1) of the connecting rod is provided in the middle of the rotating cylinder (22), a second mounting hole (17-1) of the connecting rod is provided in the middle of the robot connecting plate (17), and a third mounting hole (14-1) of the connecting rod is provided in the middle of the fixing seat (14). After the upper end of the connecting rod (6) passes through the third mounting hole (14-1), the second mounting hole (17-1) and the first mounting hole (22-1) of the connecting rod in sequence, and is detachably connected to the lifting cylinder connecting shaft (21-1) passing through the mounting through hole (3-1), the fixing seat (14) is detachably fixed to the bottom of the robot connecting plate (17), and the limit block (4) is installed at The fixing seat (14) is below and is located on one side of the connecting rod (6). The interior of the shifting rod (16) is hollow. The upper end is detachably fixedly connected to the side of the fixing seat (14) and is located below the robot connecting plate (17). A pull pin mounting hole (16-1) is formed at the bottom of the lower end. The pull pin spring (18) and the shifting pin (11) are sequentially installed into the shifting rod (16) through the pull pin mounting hole (16-1) and are fixed by pins. The two ends of the upper surface of the lower fixing plate (13) are fixedly connected to the bottom of the robot connecting plate (17) through the connecting shaft (5) and are located on one side of the shifting rod (16). The material picking seat (8) is a cylindrical stepped structure with an open lower end and a hollow interior. A connecting rod is provided on the top. The fourth mounting hole (8-1), the middle of the lower fixed plate (13) is provided with a material picking seat body insertion hole (13-2), the upper end of the material picking rod (9) is provided with a spring mounting countersunk hole (9-3), the upper end of the material picking seat (8) passes through the material picking seat body insertion hole (13-2) until the lower end of the connecting rod (6) is inserted into the fourth mounting hole (8-1) of the connecting rod, and the lower end opening is sequentially installed with the material picking rod spring (19) and the material picking rod (9), the upper end of the material picking rod spring (19) is connected to the lower end of the connecting rod (6) located in the material picking seat (8), and the lower end is inserted into the spring mounting countersunk hole (9-3), the limit pin (12) is L-shaped, and is composed of an upper pin shaft (12-1) and a side pin shaft (12-2),The upper pin shaft (12-1) and the side pin shaft (12-2) are perpendicular to each other. The limit seat (15) is detachably mounted above the lower fixed plate (13) and is located on one side of the material picking seat (8). The upper pin shaft (12-1) is mounted on the limit seat (15) and can move up and down so that the end portion can contact / move away from the side of the limit block (4). The side pin shaft (12-2) sequentially passes through the first side pin shaft insertion hole (8-2) opened on the side of the material picking seat (8) and the second side pin shaft insertion hole (9-2) opened on the side of the material picking rod (9). The bottom of the material picking seat (8) is provided with mounting grooves (8-6) with uniform spacing, and each mounting groove (8-6) is embedded with the magnetic metal block. The limiting rod (10) is detachably mounted on the lower surface of the lower fixed plate (13), and the detent pin (11) is used to position the two torsion legs of the torsion spring respectively. The guide rod (7) is detachably mounted on the lower surface of the lower fixed plate (13) and is closely attached to the guide rod guide groove (8-4) preset on the outer peripheral surface of the material picking seat (8), so as to guide the material picking seat (8) to always maintain vertical movement.

2. A torsion spring tightening assembly mechanism according to claim 1, characterized in that: The first side pin shaft insertion hole (8-2), the second side pin shaft insertion hole (9-2), the pin pulling connection hole (11-3) and the upper pin shaft placement groove (15-3) are all vertically elliptical.

3. A torsion spring tightening and assembling mechanism according to claim 2, characterized in that: The magnetic metal block is a magnet.

4. A torsion spring tightening and assembling mechanism according to claim 3, characterized in that: The torsion spring tightening assembly mechanism further comprises a cushion block (2), and the cushion block (2) is detachably mounted between the lifting cylinder mounting plate (3) and the rotating cylinder (22).

5. The torsion spring tightening and assembling mechanism according to claim 4, characterized in that: The detachable modes are all bolt / screw connections.

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