A shock absorber compression type swaging device

Abstract

This application relates to the field of screwing equipment technology, specifically a shock absorber clamping screwing device. The device comprises a worktable, a screwing mechanism mounted on the worktable, and a robotic arm. The worktable has a working opening. The device also includes a positioning module mounted on the worktable, consisting of positioning component one, positioning component two, and positioning component three. Positioning component one is used for initial positioning of the workpiece and moving it upwards through the working opening to engage with the screwing mechanism. This shock absorber clamping screwing device employs a three-stage positioning structure: initial positioning by bottom lifting of positioning component one, radial guidance and correction by positioning component two, and lateral bidirectional clamping by positioning component three. Combined with a coaxial shield and working opening structure, it comprehensively constrains the workpiece's degrees of freedom from the bottom, circumferential, and lateral directions, solving the problems of workpiece tilting, shifting, and shaking in traditional screwing devices.

Description

Technical Field

[0001] This application relates to the field of screwing equipment technology, and in particular to a shock absorber clamping screwing device. Background Technology

[0002] As a core component of the automotive suspension system, the assembly quality of the shock absorber directly affects the vehicle's driving safety, handling stability, and ride comfort. During the assembly of the shock absorber assembly, the threaded connection between the piston rod and the dust cover or outer cylinder is one of the most critical processes. The precision and consistency of the tightening torque directly determine the sealing performance and service life of the shock absorber.

[0003] Currently, existing shock absorber screwing devices typically employ a separate lifting mechanism, clamping mechanism, and tightening mechanism operating in stages. For example, patent document CN104647015B discloses a shock absorber screwing device that uses an independent top-pressure cylinder to lift the workpiece into position, then uses an independent clamping cylinder to clamp the workpiece from both sides, and finally the tightening mechanism descends to complete the screwing.

[0004] However, the application also has the following defects, such as the lack of a progressive guiding and positioning structure during the lifting process of the workpiece, and the reliance on the clamping mechanism at the end for forced correction, which can easily cause the workpiece to be skewed or scratched on the surface. At the same time, it is easily affected by torque vibration during the screwing operation, which can easily cause the workpiece to loosen and shift. Therefore, a shock absorber clamping screwing device is proposed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a shock absorber clamping screwing device, which has advantages such as achieving lifting guidance and positioning, correcting offset errors during the workpiece lifting process, and improving screwing quality, thus solving the aforementioned problems.

[0006] This application provides a shock absorber clamping screw-on device, which adopts the following technical solution: A shock absorber clamping screwing device includes a screwing device consisting of a worktable, a screwing mechanism disposed on the worktable, and a robot arm. The worktable has a working opening inside. The screwing device also includes a positioning module disposed on the worktable. The positioning module consists of positioning component one, positioning component two, and positioning component three. Positioning component one is used to initially position the workpiece and move it upward through the working opening to screw it into the screwing mechanism. During the lifting process, positioning is performed by positioning component two and positioning component three respectively. A linkage is provided between positioning component two and positioning component three. The second positioning component includes a cylindrical shield and a guide cover fitted outside the shield. A positioning rod slides through the shield, with one end of the positioning rod abutting the outer surface of the workpiece and the other end abutting the inner side of the shield. The shield has a guide surface inside for adjusting the position of the positioning rod. When the first positioning component lifts the workpiece, the first positioning component contacts the shield and drives the shield to move upward synchronously, thereby driving the positioning rod to contact the workpiece, thus guiding and limiting the workpiece. At the same time, the third positioning component is driven by the linkage to clamp and fix the side of the workpiece.

[0007] Optionally, the positioning component one includes a press-fit cylinder, a connector detachably mounted on the output end of the press-fit cylinder, and a mounting plate fixed to the outer surface of the connector. A push rod is installed inside the mounting plate, and an adjusting nut that is threadedly engaged with the push rod is rotatably mounted on one side of the mounting plate. The push rod is located below the positioning component two. When the positioning component one lifts the workpiece, the push rod contacts the guide cover in the positioning component two, thereby driving the positioning component two.

[0008] Optionally: a base plate is welded to the bottom side of the workbench, and the press-fit cylinder is fixed to the top side of the base plate; both the shield and the guide cover are hollow inside, the shield is bolted to the bottom side of the workbench and is coaxial with the working opening, and a buffer spring is installed between the shield and the workbench.

[0009] Optional: A ball bearing is rotatably mounted on the end of the positioning rod near the working end; a return spring is wound around the outer surface of the positioning rod; there are multiple positioning rods, and the multiple positioning rods are distributed equidistantly in a ring; the guide surface is composed of a ring-shaped straight surface and an inclined surface.

[0010] Optionally: The positioning component three is slidably disposed on the top side of the worktable, and is used to fix the side of the workpiece after the positioning component one and the positioning component two fix the bottom of the workpiece; the positioning component three includes a slide and a clamping block, and a buffer plug rod extending into the interior of the slide is fixed on one side of the clamping block.

[0011] Optionally: The slide block has a cavity adapted to the buffer stop rod, the buffer stop rod is slidably sealed in the cavity, and a return spring is wound around the outer surface of the buffer stop rod; a valve pipe communicating with the cavity is fixed on the top side of the slide block, a nozzle is fixed at the other end of the valve pipe, an outer connecting pipe is installed on the outer wall of the nozzle, a guide rail is fixed on the top side of the worktable, and both the slide block and the clamping block are slidably connected to the guide rail.

[0012] Optional: The linkage assembly includes an interference fit guide seat one and a guide seat two. The guide seat one is fixed to the outer surface of the guide cover, and the guide seat two is fixed to the bottom side of the slide. Abutting inclined surface is provided between the guide seat one and the guide seat two for abutting fit. When the shield moves upward, the slide is pushed to move towards the workpiece by the guidance of the guide seat one and the guide seat two. The workpiece is fixed by the clamping block. When the workpiece is fixed, the clamping block pushes the buffer plug rod. The buffer plug rod slides inside the cavity to increase the pressure, and then high-pressure gas is sprayed out through the valve pipe and the nozzle to clean the screw joint of the workpiece.

[0013] Optionally: The worktable has a sliding opening inside, the guide seat 2 slides through the sliding opening, and a return spring 3 is fixed between the inner side of the sliding opening and the guide seat 2. The number of positioning components 3 is two and they are symmetrically distributed on the left and right.

[0014] Optionally, the screwing mechanism includes a mounting bracket and a lifting cylinder fixed to the top side of the workbench, a slide table slidably mounted on the side of the mounting bracket, and a screw-on wrench fixed to the slide table. A retaining seat is mounted on the flange of the output shaft of the screw-on wrench. The retaining seat is located directly above the working port. A locking component is provided between the slide table and the slide seat.

[0015] Optionally: The locking assembly includes a hinge seat one and a hinge seat two, with a connecting rod hinged between the hinge seat one and the hinge seat two. A horizontal plate is welded to one side of the hinge seat two. The hinge seat one is bolted to the bottom side of the slide table. A return spring four connected to the guide rail is installed on the outer side of the horizontal plate. A positioning shaft is also fixed on the outer side of the horizontal plate. Positioning holes for insertion and cooperation with the positioning shaft are opened inside both the guide rail and the slide table.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention employs a three-stage positioning structure: a bottom lifting initial positioning component one, a radial guiding correction component two, and a lateral bidirectional clamping component three. Combined with a coaxial shield and working port structure, it constrains the workpiece's degrees of freedom from the bottom, circumferential, and lateral directions, solving the problems of workpiece tilting, offsetting, and shaking that are common in traditional screwing devices. Furthermore, through the adjustable top rod and adjusting nut, it can be adapted to shock absorber workpieces of different heights and specifications, significantly improving the equipment's versatility.

[0017] 2. The present invention forms a double flexible protection structure by means of the ball bearing at the end of the positioning rod and the reset spring matching the clamping block, so as to avoid the problems of scratches, deformation and pressure damage on the workpiece surface caused by rigid contact and squeezing.

[0018] 3. This invention utilizes clamping and squeezing force to convert into gas pressure, thereby achieving automatic high-pressure air cleaning of the screw joints. This thoroughly removes processing impurities and avoids defects such as screw joint misalignment, thread wear, and assembly loosening caused by residual impurities, significantly improving the screw joint assembly accuracy and finished product yield of the shock absorber.

[0019] 4. This invention achieves mechanical locking of the clamping structure during the screwing operation through a locking component, eliminating problems such as clamp block displacement and workpiece loosening caused by equipment vibration and screwing torque impact, and ensuring the absolute stability of the workpiece during high-torque screwing. Attached Figure Description

[0020] Figure 1 This is a side view of the overall structure of this application; Figure 2 This is a three-dimensional structural view of the screwing mechanism of this application; Figure 3 This is a three-dimensional structural view of the positioning module of this application; Figure 4 This is a structural schematic diagram of the positioning component one of this application; Figure 5 This is a cross-sectional view of the positioning module of this application; Figure 6 This is a cross-sectional view of the structure of positioning component two in this application; Figure 7 This is a cross-sectional view of the positioning component three in this application; Figure 8 This is a cross-sectional view of the locking component of this application; Figure 9 This application Figure 8 A magnified structural diagram of structure A is shown.

[0021] Explanation of reference numerals in the attached figures: 1. Workbench; 11. Base plate; 12. Working port; 2. Screwing mechanism; 21. Mounting bracket; 22. Slide table; 23. Lifting cylinder; 24. Screw wrench; 25. Card seat; 3. Positioning module; 31. Positioning component one; 311. Press-fit cylinder; 312. Connector; 313. Mounting plate; 314. Top rod; 315. Adjusting nut; 32. Positioning component two; 321. Shield; 322. Positioning rod; 323. Ball bearing; 324. Return spring one; 325. Guide cover; 326. Buffer spring 327. Guide surface; 33. Positioning component three; 331. Slide; 332. Clamping block; 333. Buffer rod; 334. Cavity; 335. Return spring two; 336. Valve pipe; 337. Nozzle; 34. Slide port; 35. Return spring three; 36. Guide rail; 37. Guide seat one; 38. Guide seat two; 39. Abutting slope; 4. Robotic arm; 5. Locking component; 51. Hinge seat one; 52. Hinge seat two; 521. Horizontal plate; 53. Connecting rod; 54. Positioning shaft; 55. Return spring four. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.

[0023] like Figures 1-9 As shown in the figure, this application discloses a shock absorber clamping screwing device, including a workbench 1, a screwing mechanism 2 disposed on the workbench 1, and a robot arm 4. Specifically, the robot arm 4 adopts an existing automated loading and unloading robot arm 4, which is arranged on one side of the workbench 1 to realize automated workpiece picking and unloading operations. A circular working opening 12 is vertically opened at the center of the workbench 1 as a working channel for lifting and screwing workpieces.

[0024] To achieve screwing, the screwing mechanism 2 is fixed to the rear top side of the workbench 1, including a mounting frame 21, a slide table 22, a lifting cylinder 23, a screw-on wrench 24, and a clamping seat 25. The mounting frame 21 adopts a vertical gantry structure and is fixed to the top surface of the workbench 1. The lifting cylinder 23 is vertically fixed to the top of the mounting frame 21, and the output end of the lifting cylinder 23 is fixedly connected to the slide table 22, driving the slide table 22 to slide up and down along the vertical slide rail on the side of the mounting frame 21. The screw-on wrench 24 is fixed to the front side of the slide table 22. The screw-on wrench 24 is a servo torque wrench, which can accurately control the screwing torque and speed, and is suitable for the precision assembly requirements of shock absorbers. The bottom of the vertical output shaft of the screw-on wrench 24 is detachably mounted on the clamping seat 25 through a flange. The clamping seat 25 is located directly above the working port 12. The inner side of the clamping seat 25 is provided with a clamping structure that matches the thread of the workpiece, which can firmly clamp the top of the workpiece and ensure the stability of the screwing transmission. The detachable flange structure allows for the replacement of different models of clamping seats 25 according to different workpiece specifications, thus expanding the processing range of the equipment.

[0025] To improve the screwing effect, the screwing device also includes a positioning module 3 set on the workbench 1. The positioning module 3 consists of a positioning component 1 31, a positioning component 2 32 and two sets of positioning components 33. The bottom side of the workbench 1 is welded with a base plate 11 and the top side of the workbench 1 is fixed with a guide rail 36.

[0026] Positioning component 31 serves as the lifting power and preliminary positioning structure for the workpiece, including a pressing cylinder 311, a mounting base 312, a mounting plate 313, push rods 314, and an adjusting nut 315. The pressing cylinder 311 is vertically fixed to the center of the top side of the base plate 11 by bolts, ensuring vertical coaxial output of the lifting power. The telescopic output end of the pressing cylinder 311 is detachably threaded onto the mounting base 312. This detachable structure facilitates the replacement of the mounting base 312 with different specifications of shock absorber workpieces, improving the equipment's versatility. A circular mounting plate 313 is coaxially fixed to the outside of the mounting base 312. Multiple push rods 314 are evenly inserted and installed inside the mounting plate 313. The push rods 314 are arranged vertically, with their tops facing the lower end face of positioning component 32. The adjusting nut 315 is nested on the outside of the mounting plate 313. The adjusting nut 315 is threaded and matched with the bottom end of the push rod 314. By rotating the adjusting nut 315, the vertical extension length of the push rod 314 can be precisely adjusted, thereby accurately controlling the trigger stroke of the positioning component 2 32 to adapt to the processing requirements of workpieces with different height specifications.

[0027] Positioning component 2 32 is the core structure for radial alignment of the workpiece, including a hollow cylindrical shield 321, a positioning rod 322, a ball bearing 323, a return spring 324, a guide cover 325, a buffer spring 326, and a guide surface 327. The shield 321 is detachably installed on the bottom side of the worktable 1 by bolts and is coaxially set with the working opening 12 to ensure the coaxiality accuracy of workpiece lifting and alignment. Buffer springs 326 are evenly installed between the shield 321 and the bottom surface of the worktable 1. Under normal conditions, the shield 321 is supported in its initial low position by the buffer springs 326, which can achieve flexible buffering during lifting operations to avoid rigid impact damage to the structure.

[0028] The shield 321 has 6-8 equidistantly spaced positioning rods 322 inside, adapting to the annular positioning requirements of circular cylindrical shock absorber workpieces. Each positioning rod 322 has a rotatable ball bearing 323 embedded at its inner end near the workpiece end, using a rolling contact method instead of traditional sliding contact to minimize scratches on the workpiece's outer wall and reduce frictional resistance during workpiece lifting. A return spring 324 is wound around the outer end of the positioning rod 322. The two ends of the return spring 324 are fixed to the rod body of the positioning rod 322 and the inner wall of the shield 321, respectively. Under normal conditions, it pushes the positioning rod 322 outward to release the workpiece's constraint. An annular guide surface 327 is provided on the inner wall of the shield 321. The guide surface 327 is smoothly composed of an upper vertical straight surface and a lower inclined slope surface. When the shield 321 moves upward, the inclined surface gradually presses against the ends of the positioning rods 322, achieving uniform centripetal contraction of the positioning rods 322 and ensuring the stability of the workpiece's alignment. The guide cover 325 is hollowly fitted outside the shield 321 and moves up and down synchronously with the shield 321 to trigger the operation of the subsequent positioning component 333.

[0029] Two sets of positioning components 33 are symmetrically slidably mounted on the top guide rail 36 of the worktable 1, cooperating with each other to complete the double-sided clamping and fixing of the workpiece. Each set of positioning components 33 includes a slide 331, a clamping block 332, a buffer rod 333, a cavity 334, a return spring 335, a valve pipe 336, and a nozzle 337. The slide 331 slides and matches the guide rail 36, and can slide horizontally back and forth along the guide rail 36. The clamping block 332 is nested inside the slide 331. The inner side of the clamping block 332 adopts an arc-shaped fitting structure to match the curvature of the outer wall of the shock absorber workpiece, improving the clamping fit and stability. Among them, the surface of the clamping block 332 facing the workpiece is provided with an elastic pad. By setting the elastic pad, rigid contact between the clamping block 332 and the side wall of the workpiece can be further avoided, preventing scratches or indentations on the surface of the workpiece during clamping, which is especially suitable for shock absorber workpieces with high surface precision requirements.

[0030] A buffer stopper 333 is fixed to the center of the outer side of the clamping block 332. The buffer stopper 333 is slidably and sealingly inserted into the cavity 334 inside the slide block 331. The cavity 334 is a sealed hollow structure filled with atmospheric pressure air. The body of the buffer stopper 333 is wound around a second return spring 335. The two ends of the second return spring 335 are respectively connected to the clamping block 332 and the inner wall of the slide block 331, realizing flexible buffering and automatic reset of the clamping block 332. A valve pipe 336 communicating with the cavity 334 is fixed to the top side of the slide block 331. The end of the valve pipe 336 is connected to an inclined nozzle 337. The nozzle 337 is directly aligned with the threaded connection position on the top of the workpiece, accurately aligning with the cleaning area. An external pipe is installed on the outside of the nozzle 337, which can selectively connect to an external air source to meet high-intensity cleaning needs. It should be noted that a check valve is installed in the valve pipe 336, and a pressure relief valve communicating with the cavity 334 is installed in the slide block 331. In addition, when the high-pressure airflow generated in cavity 334 is insufficient to meet the cleaning requirements, an external air source can be introduced through an external pipe to provide auxiliary air supply and ensure the cleaning effect on the screw joint of the workpiece.

[0031] To achieve the cooperation between positioning component 2 32 and positioning component 33, the linkage uses interference fit guide seat 1 37 and guide seat 2 38. Guide seat 1 37 is fixed to both sides of the outer wall of guide cover 325, and guide seat 2 38 is fixed to the bottom side of the corresponding slide 331. A sliding opening 34 is opened at the corresponding position of the worktable 1. Guide seat 2 38 slides through the sliding opening 34. A return spring 35 is fixed between the inner wall of the sliding opening 34 and guide seat 2 38. Under normal conditions, the slide 331 is pulled away from the workpiece and kept in the released state. The opposing surfaces of guide seat 1 37 and guide seat 2 38 are provided with matching abutment slopes 39. The slope angle is set to 30-45° to ensure that the vertical lifting motion is smoothly converted into the horizontal clamping motion, and the transmission is smooth and without jamming. To further improve the workpiece fixing effect, a locking assembly 5 is provided between the slide table 22 and the slide block 331. The locking assembly 5 is used to achieve rigid interlocking between the screwing mechanism 2 and the positioning mechanism, and includes a hinge seat 1 51, a hinge seat 2 52, a connecting rod 53, a positioning shaft 54, and a return spring 4 55. The hinge seat 1 51 is fixed to the bottom side of the slide table 22 by bolts, and the hinge seat 2 52 is located on the outside of the slide block 331. The connecting rod 53 is hinged between the two to form a connecting rod 53 transmission structure, which can automatically push and pull the slide table 22 as it rises and falls. A horizontal plate 521 is welded and fixed to the outside of the hinge seat 2 52, and a vertical positioning shaft 54 ​​is fixed to the center of the inner side of the horizontal plate 521. The guide rail 36 and the slide block 331 have coaxial positioning holes at corresponding positions. The positioning holes and the positioning shaft 54 ​​are clearance-fitted to ensure the insertion accuracy. A return spring 55 is connected to the outside of the horizontal plate 521. The end of the return spring 55 is fixed to the end of the guide rail 36. Under normal conditions, pulling the horizontal plate 521 to return it to its original position causes the positioning shaft 54 ​​to disengage from the positioning hole, thus unlocking the positioning mechanism. When the slide table 22 descends to the working position, the connecting rod 53 pulls the hinge seat 52 to move, causing the positioning shaft 54 ​​to insert into the positioning hole, completing the rigid locking and completely restricting the sliding freedom of the slide 331.

[0032] Combined with appendix Figures 1-9 The working principle of the above embodiments is as follows: When the press cylinder 311 in the positioning component 1 is activated, its output end drives the receiving seat 312 and the mounting plate 313 to rise, lifting the workpiece upward from the working port 12. During this process, the push rod 314 on the mounting plate 313 first contacts the lower end face of the guide cover 325 of the positioning component 2 32, overcoming the elastic force of the buffer spring 326, and driving the entire shield 321 to move upward synchronously along the working port 12 axis. When the shield 321 moves upward, the annular guide surface 327 inside it is displaced relative to the positioning rod 322. Since one end of the positioning rod 322 abuts against the outer surface of the workpiece and the other end abuts against the guide surface 327, and a return spring 324 is sleeved on the positioning rod 322, under the squeezing action of the guide surface 327 transitioning from a straight surface to an inclined surface, multiple annularly distributed positioning rods 322 synchronously retract centripetally, and the ball bearings 323 at their ends gently and accurately abut against the outer wall of the middle section of the workpiece, realizing the radial alignment and secondary guidance limit of the long-stroke workpiece. As the shield 321 moves the guide 325 upward, the guide seat 37 fixed to the outer wall of the guide 325 rises synchronously. The guide seat 37 presses the guide seat 38 through its abutting inclined surface 39, forcing the guide seat 38 to slide horizontally within the slide 34 against the elastic force of the return spring 35, thereby pushing the slide 331 in the positioning assembly 33 to move along the guide rail 36 towards the workpiece. After the clamping block 332 contacts the side wall of the workpiece, its buffer plug rod 333 retracts into the cavity 334 inside the slide 331. On the one hand, the return spring 335 provides flexible buffer clamping force, and on the other hand, it squeezes the air in the cavity 334 to form a high-pressure airflow. This airflow is sprayed out through the valve pipe 336 and the nozzle 337 to accurately blow the screw-fitted mating surface on the top of the workpiece and remove impurities. The lifting cylinder 23 drives the slide table 22 to slide down along the mounting bracket 21, and the clamp 25 at the output end of the screw wrench 24 presses against the thread on the top of the workpiece. At the end of the slide table 22's descent, the connecting rod 53 of the locking assembly 5 pulls the hinge seat 52 and the cross plate 521, inserting the positioning shaft 54 ​​into the positioning hole inside the guide rail 36 and the slide 331, thus achieving a rigid mechanical interlock between the slide 331 and the slide table 22. At this time, the screw wrench 24 starts to tighten.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A shock absorber clamping screwing device, comprising a screwing device consisting of a workbench (1), a screwing mechanism (2) disposed on the workbench (1), and a robot (4), characterized in that: The workbench (1) has a working opening (12) inside. The screwing device also includes a positioning module (3) set on the workbench (1). The positioning module (3) consists of positioning component one (31), positioning component two (32) and positioning component three (33). Positioning component one (31) is used to initially position the workpiece and move it upward through the working opening (12) to screw it into the screwing mechanism (2). During the lifting process, positioning is performed by positioning component two (32) and positioning component three (33) respectively. A linkage is provided between positioning component two (32) and positioning component three (33). The second positioning component (32) includes a cylindrical shield (321) and a guide shield (325) sleeved on the outside of the shield (321). A positioning rod (322) slides through the shield (321). One end of the positioning rod (322) abuts against the outer surface of the workpiece, and the other end abuts against the inner side of the shield (321). The shield (321) is provided with a guide surface (327) for adjusting the position of the positioning rod (322). When the first positioning component (31) lifts the workpiece, the first positioning component (31) contacts the shield (321) and drives the shield (321) to move upward synchronously, thereby driving the positioning rod (322) to contact the workpiece, thereby guiding and limiting the workpiece. At the same time, the third positioning component (33) is driven by the linkage to clamp and fix the side of the workpiece.

2. The shock absorber clamping screw-on device according to claim 1, characterized in that: The positioning component one (31) includes a press cylinder (311), a connector (312) detachably mounted on the output end of the press cylinder (311), and a mounting plate (313) fixed on the outer surface of the connector (312). A push rod (314) is installed inside the mounting plate (313), and an adjusting nut (315) threadedly engaged with the push rod (314) is rotatably mounted on one side of the mounting plate (313). The push rod (314) is located below the positioning component two (32). When the positioning component one (31) lifts the workpiece, the push rod (314) contacts the guide cover (325) in the positioning component two (32) to drive the positioning component two (32).

3. The shock absorber clamping screw-on device according to claim 2, characterized in that: A base plate (11) is welded to the bottom side of the workbench (1), and the press cylinder (311) is fixed to the top side of the base plate (11); the shield (321) and the guide cover (325) are both hollow inside, the shield (321) is bolted to the bottom side of the workbench (1), and it is coaxial with the working port (12), and a buffer spring (326) is installed between the shield (321) and the workbench (1).

4. The shock absorber clamping screw-on device according to claim 1, characterized in that: The positioning rod (322) has a ball bearing (323) rotatably mounted on the end near the working end. A return spring (324) is wound around the outer surface of the positioning rod (322). There are multiple positioning rods (322), and the multiple positioning rods (322) are distributed equidistantly in a ring. The guide surface (327) is composed of a straight surface and an inclined surface arranged in a ring.

5. The shock absorber clamping screw-on device according to claim 1, characterized in that: The positioning component three (33) is slidably disposed on the top side of the worktable (1) and is used to fix the side of the workpiece after the positioning component one (31) and the positioning component two (32) fix the bottom of the workpiece; the positioning component three (33) includes a slide (331) and a clamping block (332), and a buffer plug rod (333) extending into the slide (331) is fixed on one side of the clamping block (332).

6. The shock absorber clamping screw-on device according to claim 5, characterized in that: The slide (331) has a cavity (334) that is adapted to the buffer rod (333). The buffer rod (333) is slidably sealed in the cavity (334), and a return spring (335) is wound around the outer surface of the buffer rod (333). A valve pipe (336) communicating with the cavity (334) is fixed on the top side of the slide (331). A nozzle (337) is fixed at the other end of the valve pipe (336). An outer pipe is installed on the outer wall of the nozzle (337). A guide rail (36) is fixed on the top side of the worktable (1). The slide (331) and the clamp (332) are both slidably connected to the guide rail (36).

7. A shock absorber clamping screw-on device according to claim 6, characterized in that: The linkage assembly includes an interference fit guide seat one (37) and a guide seat two (38). The guide seat one (37) is fixed to the outer surface of the guide cover (325), and the guide seat two (38) is fixed to the bottom side of the slide (331). Abutting inclined surface (39) is provided between the guide seat one (37) and the guide seat two (38) for abutting fit. When the shield (321) moves upward, the slide (331) is pushed to move towards the workpiece by the guidance of the guide seat one (37) and the guide seat two (38). The workpiece is fixed by the clamping block (332). When the workpiece is fixed, the clamping block (332) will push the buffer plug rod (333). The buffer plug rod (333) slides inside the cavity (334) to increase the pressure, and then the high-pressure gas is sprayed out through the valve pipe (336) and the nozzle (337) to clean the screw joint of the workpiece.

8. A shock absorber clamping screw-on device according to claim 7, characterized in that: The workbench (1) has a sliding opening (34) inside. The guide seat (38) slides through the sliding opening (34), and a reset spring (35) is fixed between the inner side of the sliding opening (34) and the guide seat (38). There are two positioning components (33) and they are symmetrically distributed on the left and right.

9. A shock absorber clamping screw-on device according to claim 6, characterized in that: The screwing mechanism (2) includes a mounting bracket (21) fixed to the top side of the workbench (1) and a lifting cylinder (23), a slide (22) slidably mounted on the side of the mounting bracket (21) and a screw-on wrench (24) fixed on the slide (22). A retainer (25) is mounted on the flange of the output shaft of the screw-on wrench (24). The retainer (25) is located directly above the working port (12). A locking assembly (5) is provided between the slide (22) and the slide block (331).

10. A shock absorber clamping screw-on device according to claim 9, characterized in that: The locking assembly (5) includes a hinge seat one (51) and a hinge seat two (52). A connecting rod (53) is hinged between the hinge seat one (51) and the hinge seat two (52). A horizontal plate (521) is welded to one side of the hinge seat two (52). The hinge seat one (51) is bolted to the bottom side of the slide table (22). A return spring four (55) connected to the guide rail (36) is installed on the outside of the horizontal plate (521). A positioning shaft (54) is also fixed on the outside of the horizontal plate (521). The guide rail (36) and the slide table (331) are both provided with positioning holes that are inserted and cooperate with the positioning shaft (54).

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