A threaded connecting rod disassembly and assembly device and a connecting rod length control method

Abstract

This invention discloses a device for assembling and disassembling threaded connecting rods and a method for controlling the length of the connecting rod. The device includes a frame, a motor, a slip ring, a rotating clamp, a guide rail, and a sliding platform. The motor, slip ring, and guide rail are fixedly mounted on the frame. The rotating clamp is rotatably connected to the motor via the slip ring, and the sliding platform is slidably mounted on the guide rail. A ball joint is positioned and clamped on the rotating clamp, and the connecting rod body is positioned and clamped on the sliding platform. The motor drives the rotating clamp and the ball joint to rotate, causing the connecting rod body, which is threaded with the ball joint, to slide along the sliding platform in the direction towards the rotating clamp, thus achieving the assembly and disassembly of the connecting rod. During the rotation of the rotating clamp, the slip ring continuously supplies air to the rotating clamp to maintain the clamping force of the rotating clamp on the ball joint. This prevents the clamping force of the rotating clamp from decreasing due to air leakage, preventing the rotating ball joint from falling off or flying out, and avoiding equipment damage or personal injury accidents.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, specifically to a threaded connection rod disassembly and assembly device and a rod length control method. Background Technology

[0002] Most high-speed passenger cars and urban rail vehicles, both domestically and internationally, are equipped with anti-roll torsion bar devices to effectively suppress body roll. To facilitate installation of these devices on the bogies and car bodies, some anti-roll torsion bar devices feature threaded, adjustable-length connecting rods, with threaded mating lengths reaching up to 100mm. During installation, the length is adjusted according to the distance between the bogie and the car body. These connecting rods typically consist of a connecting rod body and a ball joint; assembly, maintenance, and disassembly require screwing the ball joint into and out of the connecting rod body.

[0003] Currently, threaded adjustable connecting rods are mainly assembled and disassembled manually by rotating the connecting rod body and ball joint. This is a piecemeal operation, characterized by irregular procedures, high labor intensity, and low efficiency. Significant errors in connecting rod length make installation difficult, thus affecting the performance of the anti-roll torsion bar system. Therefore, it is necessary to use a disassembly and assembly device to complete the connecting rod assembly, disassembly, and length adjustment work, thereby reducing labor intensity, improving efficiency, minimizing connecting rod length errors, and ensuring the performance of the anti-roll torsion bar system.

[0004] According to the patent search, the following patents are mainly related to this application:

[0005] 1. Chinese invention patent application number "202110437320.3", application date "2021.04.22", publication number "CN113118745A", publication date "2021.07.16", entitled "An Automatic Tightening Assembly Device and Assembly Method for Large-Diameter Threaded Parts", with Henan University of Science and Technology as the applicant, discloses an automatic tightening assembly device and assembly method for large-diameter threaded parts, including a first platform and a second platform; the first platform includes... The device comprises a fixed platform and a support, the support being used to support and fix the first threaded component; a second platform includes a base, a movable platform, and a platform adjustment mechanism, the movable platform being positioned directly above the base, and the platform adjustment mechanism being positioned between the base and the movable platform. The platform adjustment mechanism includes a multi-degree-of-freedom adjusting cylinder, the two ends of which are hinged to the base and the movable platform respectively. A tightening mechanism is provided on the second platform, used to fix and rotate the second threaded component, thereby screwing the second threaded component and the first threaded component together. This device can achieve automatic alignment of the two threaded components, automatically docking while ensuring coaxiality, and can output different torque values ​​to meet different tightening torque requirements. However, during the tightening operation, the clamping cylinder 8-1 is not connected to an air source, and can only rely on the residual air pressure in the clamping cylinder 8-1 to clamp the threaded component. Once the residual air in the cylinder 8-1 leaks, the rotating threaded component will fall off and fly out, causing equipment damage or personal injury accidents. Moreover, this patent has a complex structure and high production costs.

[0006] 2. Chinese invention patent application number "201310593021.4", application date "2013.11.22", publication number "CN103753494A", publication date "2014.04.30", title "Threaded Part Assembly Device", applicant "Chongqing Dunming Electromagnetic Valve Co., Ltd.", discloses a machine tool component, specifically relating to a threaded part assembly device, including a bracket. The bracket has a drive wheel and a support wheel on the same horizontal line, both hinged to the bracket. Above the support wheel and drive wheel is a clamping wheel, which forms an acute-angled triangle with the support wheel and drive wheel. The clamping wheel, rocker arm, movable connecting rod, and pressure plate are sequentially hinged. The movable connecting rod is vertically oriented, and the middle of the rocker arm and the middle of the pressure plate are hinged to the bracket. Below the clamping wheel is a part fixing seat, which is connected to the rocker arm via a fixing connecting rod, and the part fixing seat is hinged to the fixing connecting rod. However, this patent is not suitable for disassembling and assembling connecting rods.

[0007] 3. A utility model patent with application number "202020340482.6", application date "2020.03.18", publication number "CN211867063U", publication date "2020.11.06", titled "An Assembly Device for Threaded Parts", and applicant "Luxshare Precision Manufacturing (Zhejiang) Co., Ltd.", discloses an assembly device for threaded parts, belonging to the field of assembly technology for threaded parts. It includes a base; a horizontal fixing mechanism, including a product fixing component located on the base for fixing the threaded part; and a vertical fixing mechanism, including a bracket fixed to the base, a power component fixed to the bracket, a push block assembly slidably connected to the bracket, and a gripper assembly fixed to the push block assembly. The push block assembly is connected to the output end of the power component through a first elastic element. The gripper assembly can clamp the threaded part and is used to restrict the rotation of the threaded part. However, this patent is only suitable for installing small threaded connectors and is not suitable for disassembling and assembling connecting rods. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a threaded connection rod disassembly and assembly device and a rod length control method to address the deficiencies in the prior art.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a threaded connecting rod assembly / disassembly device, wherein the connecting rod includes: a connecting rod body ball joint one and a ball joint two, one end of the connecting rod body is provided with ball joint two and the other end is provided with an internal thread, and ball joint one is provided with an external thread, the connecting rod body and ball joint one are connected by threads; the connecting rod assembly / disassembly device includes: a frame, a motor, a rotating clamp, a guide rail and a sliding platform, the motor and the guide rail are fixedly mounted on the frame, the rotating clamp is mounted on the motor shaft, and the sliding platform is slidably mounted on the guide rail; ball joint one is positioned and clamped on the rotating clamp, and the connecting rod body is positioned and clamped on the sliding platform, the motor drives the rotating clamp and ball joint one to rotate, so that the connecting rod body threaded with ball joint one slides with the sliding platform in the direction towards the rotating clamp, so that ball joint one is screwed into the connecting rod body, thereby realizing the assembly / disassembly of the connecting rod. An air slip ring is provided between the motor and the rotating clamp, and during the rotation of the rotating clamp, the air slip ring continuously supplies air to the rotating clamp to maintain the clamping force of the rotating clamp on ball joint one. To prevent a decrease in the clamping force of the rotating clamp due to gas supply leakage, and to prevent the rotating ball joint from falling off or flying out, thus avoiding equipment damage or personal safety accidents.

[0010] Furthermore, the air slip ring includes: a stationary ring, an air inlet, a rotating ring, and an air outlet pipe. The stationary ring is fixedly mounted on the frame, and the rotating ring is airtightly rotatably connected to the stationary ring. The air inlet is located on the stationary ring and is used to connect to an air source. The air outlet pipe is located on the rotating ring, and the rotating ring is airtightly connected to the rotating fixture through the air outlet pipe. The stationary ring, fixed on the frame, not only supplies air to the rotating ring in a sealed manner but also provides rotational support for the motor shaft and the rotating fixture, thereby increasing the strength and rigidity of the motor shaft and the rotating fixture.

[0011] Furthermore, an annular venting groove is provided on the end face where the rotating ring contacts the stationary ring. An annular sealing groove is concentrically provided on the inner and outer rings of the venting groove, and a sealing ring is installed within the sealing groove. One end of the rotating ring is provided with a keyway for connecting to the motor shaft. The sealing ring within the sealing groove ensures that the rotating ring and stationary ring remain sealed during rotation.

[0012] Furthermore, the rotating clamp includes: a cylinder and clamping feet. The two clamping feet are installed at both ends of the cylinder. When the cylinder is inflated, it drives the two clamping feet to move towards each other, clamping the ball joint between the two clamping feet.

[0013] Furthermore, the clamping foot is provided with a jaw, which includes a jaw screw hole, a jaw cylindrical surface, and a jaw spherical surface. The jaw spherical surface is in contact with the jaw cylindrical surface, and the jaw screw hole is located on the jaw cylindrical surface. The jaw is installed on the clamping foot using bolts. Using the jaw spherical surface to clamp the spherical hinge provides a more stable grip, preventing the hinge from falling off during rotation and thus preventing equipment damage or personal injury accidents.

[0014] Furthermore, the radius of the spherical surface of the gripper is equal to the radius of the cylindrical surface of the gripper, and the radius of the spherical surface of the gripper is not greater than the outer diameter of the ball joint. This allows two contact points or two contact lines to be formed between the spherical surface of the gripper and the ball joint, making the clamping more stable.

[0015] Furthermore, the sliding platform is equipped with a second cylinder, a clamping pad, and a positioning block. The clamping pad is positioned between the two clamping feet of the second cylinder. The second cylinder drives the two clamping pads to move towards each other, clamping the connecting rod body located between the two clamping pads.

[0016] Furthermore, the clamping pads are L-shaped or V-shaped. By changing the thickness h1 of the base plate of the L-shaped clamping pad, the axial height of the connecting rod can be adjusted so that the connecting rod and the ball joint are on the same axis. After clamping the connecting rod, the V-shaped clamping pad can automatically adjust the axial height of the connecting rod to the V-shaped top height h2, achieving automatic centering.

[0017] Furthermore, a lever is installed on the sliding platform, and a limit switch for controlling the length of the connecting rod is installed on the frame. This enables automatic control of the connecting rod length during assembly.

[0018] A method for controlling the length of a connecting rod using the above-mentioned threaded connecting rod assembly / disassembly device, characterized by comprising the following steps:

[0019] S1: Adjust the position of the limit switch on the frame according to the predetermined length of the connecting rod;

[0020] S2: With the end of the connecting rod body with the internal thread facing the direction of the rotating clamp, place the connecting rod body between the two clamping pads, press the ball hinge two against the positioning block for positioning, open the air valve to supply air to the air cylinder two, and the air cylinder two drives the two clamping pads to move towards each other to clamp the connecting rod body.

[0021] S3: Screw the external thread of ball hinge one into the internal thread of connecting rod body, screwing in at least one turn;

[0022] S4: Drag the sliding platform along the guide rail toward the rotating clamp, so that the top of the ball joint one abuts against the positioning plate of the rotating clamp for positioning. Open the air valve to supply air to the air cylinder one. The air cylinder one drives the two clamping feet and jaws to move towards each other, clamping the ball joint one.

[0023] S5: Start the motor. The motor drives the ball joint to rotate through the rotating clamp, and screws the ball joint into the connecting rod body. During the screwing process, the air source continuously supplies air to the cylinder through the air slip ring. At the same time, the connecting rod body and the sliding platform are dragged by the rotating ball joint.

[0024] S6: As the connecting rod and sliding platform are dragged toward the rotating fixture, the length of the connecting rod gradually shortens. When the lever on the sliding platform touches the limit switch, the motor stops. At this time, the length of the connecting rod is the predetermined length. Then, the air valve is closed, so that cylinder one releases ball joint one and cylinder two releases the connecting rod body. The assembled connecting rod is removed, and the connecting rod length adjustment is completed.

[0025] The beneficial effects of this invention are as follows: By incorporating an air slip ring in the connecting rod assembly / disassembly device, a continuous air supply is provided to the rotating clamp to maintain the clamping force of the rotating clamp on the ball joint, preventing a decrease in clamping force due to air leakage. Simultaneously, the use of spherical jaws to hold the spherical ball joint provides a more secure grip, preventing the rotating ball joint from detaching or flying off, thus avoiding equipment damage or personal injury accidents. Furthermore, the connecting rod assembly / disassembly device of this invention enables automatic control of the connecting rod length, reducing labor intensity, improving assembly / disassembly efficiency, minimizing connecting rod length errors, and ensuring the performance of the anti-roll torsion bar system. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the threaded connection connecting rod.

[0027] Figure 2 This is a three-dimensional structural diagram of Embodiment 2 of the threaded connection rod.

[0028] Figure 3 This is a three-dimensional structural diagram of the connecting rod assembly / disassembly device.

[0029] Figure 4 This is a partial three-dimensional structural diagram of the connecting rod assembly / disassembly device.

[0030] Figure 5 for Figure 4 Schematic diagram of the cross section along line A-A.

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of the gripper.

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure of the L-shaped clamping pad.

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the V-shaped clamping pad.

[0034] Figure 9 This is a three-dimensional structural diagram illustrating the connection mechanism for disassembling and assembling the connecting rod.

[0035] Figure 10 This is a partial top view of the connecting rod assembly / disassembly device during the assembly / disassembly of the connecting rod.

[0036] Figure 11 for Figure 10 Schematic diagram of cross-section B-B.

[0037] Figure 12 This is a pneumatic control diagram for the connecting rod assembly / disassembly device.

[0038] In the diagram: 1—Frame; 2—Motor; 3—Air slip ring; 31—Stationary ring; 32—Air inlet; 33—Moving ring; 34—Air outlet pipe; 35—Sealing groove; 36—Ventilation groove; 37—Keyway for connecting shaft; 4—Rotating fixture; 41—Cylinder 1; 42—Positioning plate; P—Positioning plate and ball joint 1 contact positioning point; 43—Clamping foot; 44—Clamping jaw; 441—Clamping jaw screw hole; 442—Clamping jaw cylindrical surface; R442—Clamping jaw cylindrical surface radius; 443—Clamping jaw spherical surface; R443—Clamping jaw spherical surface radius; M / N—Contact point between the gripper and the ball joint 1; 5—Guide rail; 6—Sliding platform; 61—Cylinder 2; 62—Clamping pad; 621—L-shaped clamping pad upright plate; 622—L-shaped clamping pad bottom plate; h1—L-shaped clamping pad bottom plate thickness; 623—V-shaped clamping pad; h2—V-shaped top height; 63—Positioning stop; 64—Lever; 7—Limit switch; 8—Air source; 9—Filter; 10—Air valve; 100—Connecting rod; 101—Ball joint 1; R101—Ball joint 1 outer diameter; 102—Connecting rod body; 103—Ball joint 2. Detailed Implementation

[0039] The present invention will be further described below with reference to specific embodiments and accompanying drawings:

[0040] like Figure 1 and Figure 2 As shown, the connecting rod 100 includes: a connecting rod body 102, a ball joint 101 and a ball joint 103. One end of the connecting rod body 102 is provided with the ball joint 103 and the other end is provided with an internal thread. The ball joint 101 is provided with an external thread. The connecting rod body 102 and the ball joint 101 are connected by threads.

[0041] like Figure 3 As shown, the connecting rod assembly / disassembly device includes: a frame 1, a motor 2, a slip ring 3, a rotating clamp 4, guide rails 5, and a sliding platform 6. The motor 2 and slip ring 3 are fixedly mounted on the frame 1. The rotating clamp 4 is rotatably connected to the motor 2's shaft via the slip ring 3. Two guide rails 5 are parallel to each other on the frame 1, facing towards the motor 2 and slip ring 3. The sliding platform 6 is slidably mounted on the guide rails 5. The sliding platform 6 is equipped with a second cylinder 61, a clamping pad 62, and a positioning block 63. The clamping pad 62 is positioned between the two clamping feet of the second cylinder 61. The second cylinder 61 drives the two clamping pads 62 to move towards each other, clamping the connecting rod 102 located between the two clamping pads 62. The positioning block 63 consists of two spaced-apart L-shaped plates fixed to the side of the second cylinder 61 away from the motor 2.

[0042] like Figures 4 to 5 As shown, the air slip ring 3 includes: a stationary ring 31, an air inlet 32, a moving ring 33, an air outlet pipe 34, a sealing groove 35, a ventilation annular groove 36, and a connecting keyway 37. The stationary ring 31 is fixedly mounted on the frame 1, and the air inlet 32 ​​is located on the stationary ring 31 for connecting to an air source. The end face of the moving ring 33 that contacts the stationary ring 31 is provided with an annular ventilation groove 36. An annular sealing groove 35 is concentrically provided on the inner and outer rings of the ventilation annular groove 36, and a sealing ring is provided in the sealing groove 35 to achieve an airtight rotational connection between the moving ring 33 and the stationary ring 31. The air outlet pipe 34 is located on the moving ring 33, and the moving ring 33 is airtightly connected to the rotating clamp 4 through the air outlet pipe 34. One end of the moving ring 33 is provided with a connecting keyway 37 for connecting to the rotating shaft of the motor 2.

[0043] like Figure 6 As shown, the gripper 44 includes: a gripper screw hole 441, a gripper cylindrical surface 442 and a gripper spherical surface 443. The gripper spherical surface 443 is connected to the gripper cylindrical surface 442. The gripper screw hole 441 is provided on the gripper cylindrical surface 442. The gripper 44 is installed on the gripper foot 43 by bolts.

[0044] like Figure 11 As shown, the radius of the spherical surface of the gripper, R443, is equal to the radius of the cylindrical surface of the gripper, R442, and the radius of the spherical surface of the gripper, R443, is not greater than the outer diameter of the ball joint, R101. This allows two contact points, M and N, or two contact lines to be formed between the spherical surface of the gripper, and the ball joint, 101, making the gripping more stable.

[0045] like Figure 7As shown: The clamping pad 62 is L-shaped. By changing the thickness h1 of the L-shaped clamping pad base plate, the axial height of the connecting rod body 102 can be adjusted so that the connecting rod body 102 and the ball joint 101 are on the same axis. This avoids eccentricity between the connecting rod body 102 and the ball joint 101, prevents bending moment from occurring during the process of the ball joint 101 screwing into the connecting rod body 102, and makes the assembly smoother.

[0046] like Figure 8 As shown: The clamping pad 62 is V-shaped. After the V-shaped clamping pad 623 clamps the connecting rod 102, the axial height of the connecting rod 102 can be automatically adjusted to the top height h2 of the V-shape, achieving automatic centering. This avoids eccentricity between the connecting rod 102 and the ball joint 101.

[0047] The assembly process of connecting rod 100 is as follows: Figures 9 to 12 As shown: Ball joint 101 is positioned and clamped on rotating fixture 4, and connecting rod 102 is positioned and clamped on sliding platform 6. Motor 2 drives rotating fixture 4 and ball joint 101 to rotate, causing connecting rod 102, which is threaded onto ball joint 101, to slide along sliding platform 6 towards rotating fixture 4, thus assembling and disassembling the connecting rod. Because an air slip ring 3 is installed between motor 2 and rotating fixture 4, air is continuously supplied to rotating fixture 4 during rotation to maintain the clamping force of rotating fixture 4 on ball joint 101. This prevents a decrease in clamping force due to air leakage, preventing the rotating ball joint 101 from falling off or flying out, and avoiding equipment damage or personal injury accidents.

[0048] When assembling the connecting rod 100, the length of the assembled connecting rod 100 can be controlled, including the following steps:

[0049] S1: Adjust the position of the limit switch 7 on the frame 1 according to the predetermined length of the connecting rod;

[0050] S2: With the end of the connecting rod body 102 with the internal thread facing the direction of the rotating clamp 4, place the connecting rod body 102 between the two clamping pads 62, and position the ball hinge 103 against the positioning block 63. Open the air valve 10 to supply air to the cylinder 61. The cylinder 61 drives the two clamping pads 62 to move towards each other and clamp the connecting rod body 102.

[0051] S3: Screw the external thread of ball hinge 101 into the internal thread of connecting rod body 102, and screw in at least one turn;

[0052] S4: Drag the sliding platform 6 along the guide rail 5 toward the rotating clamp 4, so that the top of the ball joint 101 is pressed against point P on the positioning plate 42 for positioning. Open the air valve 10 to supply air to the cylinder 41. The cylinder 41 drives the two clamping feet 43 and the clamping claws 44 to move towards each other, clamping the ball joint 101.

[0053] S5: Start motor 2. Motor 2 drives ball joint 101 to rotate through rotating clamp 4, and screws ball joint 101 into connecting rod body 102. During the screwing process, air source 8 continuously supplies air to cylinder 41 through air slip ring 3. At the same time, connecting rod body 102 and sliding platform 6 are dragged by rotating ball joint 101.

[0054] S6: As the connecting rod body 102 and the sliding platform 6 are dragged toward the rotating clamp 4, the length of the connecting rod 100 gradually shortens. When the lever 64 on the sliding platform 6 touches the limit switch 7, the motor 2 stops. At this time, the length of the connecting rod 100 is the predetermined length. Then, the air valve 10 is closed, so that the cylinder 41 releases the ball joint 101 and the cylinder 61 releases the connecting rod body 102. The assembled connecting rod 100 is removed, and the connecting rod length adjustment is completed.

[0055] In summary, the beneficial effects of this invention are as follows: By incorporating an air slip ring in the connecting rod assembly / disassembly device, a continuous air supply is provided to the rotating clamp to maintain the clamping force of the rotating clamp on the ball joint, preventing a decrease in clamping force due to air leakage. Simultaneously, the use of spherical jaws to hold the spherical ball joint provides a more secure grip, preventing the rotating ball joint from detaching or flying off, thus avoiding equipment damage or personal injury accidents. Furthermore, the connecting rod assembly / disassembly device of this invention enables automatic control of the connecting rod length, reducing labor intensity, improving assembly / disassembly efficiency, minimizing connecting rod length errors, and ensuring the performance of the anti-roll torsion bar system.

[0056] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the protection scope of the invention, which should be defined by the claims.

Claims

1. A threaded connection rod disassembly and assembly device, wherein the connecting rod (100) comprises: The connecting rod body (102) has ball joint 1 (101) and ball joint 2 (103). One end of the connecting rod body (102) is provided with ball joint 2 (103) and the other end is provided with internal thread. Ball joint 1 (101) is provided with external thread. The connecting rod body (102) and ball joint 1 (101) are connected by threads. The connecting rod assembly and disassembly device includes: frame (1), motor (2), rotating clamp (4), guide rail (5) and sliding platform (6). The motor (2) and guide rail (5) are fixedly installed on the frame (1). The rotating clamp (4) is installed on the rotating shaft of the motor (2). The sliding platform (6) is slidably installed on the guide rail (5). Ball joint 1 (101) is positioned and clamped on the rotating clamp (4). The connecting rod body (102) is positioned and clamped on the sliding platform (6). The motor (2) drives the rotating clamp (4) and the ball joint (101) to rotate, so that the connecting rod body (102) threaded with the ball joint (101) slides with the sliding platform (6) in the direction towards the rotating clamp (4), so that the ball joint (101) is screwed into the connecting rod body (102), thereby realizing the assembly and disassembly of the connecting rod. The feature is that an air slip ring (3) is provided between the motor (2) and the rotating clamp (4). During the rotation of the rotating clamp (4), the air slip ring (3) continuously supplies air to the rotating clamp (4) to maintain the clamping force of the rotating clamp (4) on the ball joint (101).

2. The threaded connection rod disassembly and assembly device according to claim 1, characterized in that: The air slip ring (3) includes: a stationary ring (31), an air inlet (32), a moving ring (33), and an air outlet pipe (34). The stationary ring (31) is fixedly installed on the frame (1), and the moving ring (33) is airtightly rotatably connected to the stationary ring (31). The air inlet (32) is set on the stationary ring (31) and is used to connect to the air source. The air outlet pipe (34) is set on the moving ring (33), and the moving ring (33) is airtightly connected to the rotating clamp (4) through the air outlet pipe (34).

3. The threaded connection rod disassembly and assembly device according to claim 2, characterized in that: The end face of the moving ring (33) that contacts the stationary ring (31) is provided with an annular venting groove (36). An annular sealing groove (35) is provided concentrically on the inner and outer rings of the venting annular groove (36). A sealing ring is provided in the sealing groove (35). One end of the moving ring (33) is provided with a connecting keyway (37) for connecting with the shaft of the motor (2).

4. The threaded connection rod disassembly and assembly device according to claim 3, characterized in that: The rotating clamp (4) includes a cylinder (41) and clamps (43). The two clamps (43) are installed at both ends of the cylinder (41). When the cylinder (41) is inflated, it drives the two clamps (43) to move towards each other, clamping the ball joint (101) between the two clamps (43).

5. The threaded connection rod disassembly and assembly device according to claim 4, characterized in that: A jaw (44) is provided on the jaw (43). The jaw (44) includes a jaw screw hole (441), a jaw cylindrical surface (442) and a jaw spherical surface (443). The jaw spherical surface (443) is connected to the jaw cylindrical surface (442). The jaw screw hole (441) is provided on the jaw cylindrical surface (442). The jaw (44) is installed on the jaw (43) using bolts.

6. The threaded connection rod disassembly and assembly device according to claim 5, characterized in that: The spherical radius of the gripper (R443) is equal to the cylindrical radius of the gripper (R442), and the spherical radius of the gripper (R443) is not greater than the outer diameter of the ball joint (R101).

7. The threaded connection rod disassembly and assembly device according to any one of claims 1 to 6, characterized in that: The sliding platform (6) is equipped with cylinder 2 (61), clamping pad (62) and positioning block (63). The clamping pad (62) is located between the two clamping feet of cylinder 2 (61). Cylinder 2 (61) drives the two clamping pads (62) to move towards each other, clamping the connecting rod body (102) between the two clamping pads (62).

8. The threaded connection rod disassembly and assembly device according to claim 7, characterized in that: The pad (62) is L-shaped or V-shaped.

9. The threaded connection rod disassembly and assembly device according to claim 8, characterized in that: A lever (64) is provided on the sliding platform (6), and a limit switch (7) for controlling the length of the connecting rod is provided on the frame (1).

10. A method for controlling the length of a connecting rod in a threaded connection connecting rod assembly / disassembly device according to claim 9, characterized in that... Includes the following steps: S1: Adjust the position of the limit switch (7) on the frame (1) according to the predetermined length of the connecting rod; S2: With the end of the connecting rod (102) having an internal thread facing the rotating clamp (4), place the connecting rod (102) between two clamping pads (62), and position the ball hinge (103) against the positioning block (63). Open the air valve (10) to supply air to the cylinder (61), and the cylinder (61) will drive the two clamping pads (62) to move towards each other, clamping the connecting rod (102). S3: Screw the external thread of ball hinge 1 (101) into the internal thread of connecting rod body (102) and screw in at least 1 turn; S4: Drag the sliding platform (6) along the guide rail (5) toward the rotating clamp (4) so ​​that the top of the ball joint (101) presses against the positioning plate (42) of the rotating clamp (4) for positioning. Open the air valve (10) to supply air to the cylinder (41). The cylinder (41) drives the two clamping feet (43) and the clamping claw (44) to move towards each other and clamp the ball joint (101). S5: Start the motor (2). The motor (2) drives the ball joint (101) to rotate through the rotating clamp (4), and screws the ball joint (101) into the connecting rod body (102). During the screwing process, the air source (8) continuously supplies air to the cylinder (41) through the air slip ring (3). At the same time, the connecting rod body (102) and the sliding platform (6) are dragged by the rotating ball joint (101). S6: During the process of the connecting rod body (102) and the sliding platform (6) being dragged toward the rotating clamp (4), the length of the connecting rod (100) gradually shortens. When the lever (64) on the sliding platform (6) touches the limit switch (7), the motor (2) stops. At this time, the length of the connecting rod (100) is the predetermined length. Then the air valve (10) is closed, so that the first cylinder (41) releases the ball joint (101), the second cylinder (61) releases the connecting rod body (102), and the assembled connecting rod (100) is removed to complete the connecting rod length adjustment work.

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