Center traction beam overhauling tool and overhauling method for intelligent node overhauling line

Abstract

The invention discloses a center traction beam maintenance tool and method for a node intelligent maintenance line, the center traction beam maintenance tool comprises a dismounting workpiece and a pressure head, the dismounting workpiece comprises a dismounting tray, a first bottom plate and a first positioning assembly arranged on the first bottom plate, the first bottom plate is placed on the dismounting tray, and the pressure head is arranged on the dismounting tray. A bottom plate round hole I is formed in the bottom plate I; the space defined by the first positioning assemblies is matched with a base of the beam body in shape, and the central axis of the space defined by the first positioning assemblies and the central axis of the first bottom plate round hole are located on the same straight line. Through the structural design, the central traction beam can be rapidly positioned, and smooth proceeding of follow-up maintenance work is guaranteed. The pressing head is a circular-ring-shaped pressing head, and a conical part at the end part of the circular-ring-shaped pressing head extends into a mounting hole of the central pin bush to enable the central traction beam to be automatically centered, so that the circular-ring-shaped pressing head can be accurately contacted with the metal jacket to withdraw the central pin bush, and meanwhile, a rubber layer of the central pin bush is not damaged.

Description

Technical Field

[0001] The present invention relates to an overhaul tooling and an overhaul method using the overhaul tooling, and particularly relates to an overhaul tooling and an overhaul method for a central traction beam of a node intelligent overhaul line, belonging to the technical field of node overhaul. Background Art

[0002] A rail vehicle, the bogie of its car body uses a traction pin device in cooperation with double traction tie rods to transmit longitudinal force. The traction pin device includes a central traction beam and an intermediate pin. The two traction tie rods are arranged in an inclined symmetry (Z shape) with respect to the central pin of the traction pin device; as Figure 1 shown, one end of the traction tie rod 1 is connected to the central traction beam 2 of the traction pin device, and the other end is connected to the frame of the bogie (the frame of the bogie is not shown in the figure).

[0003] As Figure 2 shown, the central traction beam 2 includes a beam body 21 and a central pin sleeve 22. The beam body 21 includes a base 21a, a central pin sleeve installation cylinder 21b and a central frame 21c. A central pin sleeve installation hole is opened in the central pin sleeve installation cylinder 21b. The central pin sleeve 22 is located in the central pin sleeve installation hole, and the central pin is installed in the central pin sleeve 22. The central frame 21c is connected to the central pin sleeve installation cylinder 21b by an arc transition through an intermediate beam. As Figure 2 shown, the central frame 21c includes two pairs of installation cylinders 21c1. The four installation cylinders 21c1 are all connected to the beam body 21 by an arc transition through an intermediate beam. The paired installation cylinders 21c1 are arranged vertically. One is connected to the central pin sleeve installation cylinder 21b, and the other is connected to the base 21a. As Figure 1 shown, the traction tie rod 1 includes a tie rod node. The core shafts 1a at both ends of the tie rod node are respectively fixedly connected to the upper and lower two installation cylinders 21c1 by fasteners. As Figure 2 shown, one end of the central traction beam 2 has the base 21a (referred to as the B end), and the other end is called the A end. The B end has the base 21a, and a protrusion is provided on the inner side of the hole at the A end. When installing the central pin sleeve 22, the central pin sleeve 22 can only be inserted from the B end. When removing the node, on the contrary, force needs to be applied from the A end to disassemble the central pin sleeve 22 from the B end. As Figure 2 、 3 shown, the structure of the central pin sleeve 22 from the inside to the outside sequentially includes a rubber layer 22a and a metal outer sleeve 22b. The inner hole of the central pin sleeve installation cylinder 21b is cylindrical. As Figure 3 shown, the inner hole of the central pin sleeve 22 is in the shape of a frustum of a cone with an outer diameter gradually decreasing from the A end to the B end. As Figure 3 shown, in the central traction beam 2 of the present application, the position of the central pin sleeve 22 is lower than the position of the central pin sleeve installation cylinder 21b, and the position of the rubber layer 22a is higher than the position of the metal outer sleeve 22b.

[0004] In actual work, as the working time increases, the central towing beam, especially the center pin bushing, ages and wears, resulting in problems with the stability, safety, and smoothness of the vehicle during operation, which has a certain impact on the travel safety and riding experience of passengers. Therefore, after working for a period of time, it is necessary to disassemble the center pin bushing from the central towing beam for maintenance to ensure the stability, safety, and smoothness of the vehicle during operation.

[0005] When disassembling the center pin bushing from the central towing beam, generally, the central towing beam is placed on a tray, and then the center pin bushing is withdrawn from the center pin bushing installation hole of the central towing beam by pressing down with a press head. When placing the central towing beam on the tray, it is necessary to ensure the accuracy of the position of the central towing beam on the tooling to avoid damaging the rubber layer of the center pin bushing when the press head punches, which takes a long time and also tests the experience of the workers. The existing method for removing the node has inaccurate positioning, low efficiency, and is prone to accidentally damaging the rubber layer.

[0006] After retrieval, no patent documents identical or similar to the present application have been found.

[0007] In summary, how to design a maintenance tooling and maintenance method for the central towing beam of a node intelligent maintenance line to ensure the smooth progress of the central towing beam maintenance work, improve the efficiency of the maintenance work, and reduce the difficulty of the maintenance work is a technical problem that needs to be solved urgently. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a maintenance tooling and maintenance method for the central towing beam of a node intelligent maintenance line to ensure the smooth progress of the central towing beam maintenance work, improve the efficiency of the maintenance work, and reduce the difficulty of the maintenance work, aiming at the defects existing in the prior art.

[0009] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A maintenance tooling for the central traction beam of a node intelligent maintenance line. The central traction beam includes a beam body, a central pin sleeve, and a central frame. The beam body includes a base and a central pin sleeve installation cylinder. A central pin sleeve installation hole is provided in the central pin sleeve installation cylinder. The central pin sleeve is located in the central pin sleeve installation hole, and a central pin is installed in the central pin sleeve. The central frame is arc-transitionally connected to the central pin sleeve installation cylinder through an intermediate beam. The maintenance tooling for the central traction beam includes a disassembly workpiece and a pressing head. The disassembly workpiece includes a disassembly tray, a bottom plate 1, and a positioning component 1 provided on the bottom plate 1. The bottom plate 1 is placed on the disassembly tray, and a bottom plate round hole 1 is provided on the bottom plate 1. The space enclosed by the positioning component 1 is adapted to the shape of the base of the beam body, and the central axis of the space enclosed by the positioning component coincides with the central axis of the bottom plate round hole 1. The pressing head is an annular pressing head, and a tapered portion is provided on the outer peripheral surface of the annular pressing head. The central axis of the annular pressing head coincides with the central axis of the bottom plate round hole 1. The outer diameter of the annular pressing head is less than or equal to the outer diameter of the metal outer sleeve of the central pin sleeve, and the inner diameter of the annular pressing head is greater than the outer diameter of the end face of the rubber layer of the central pin sleeve.

[0010] Further, the positioning component 1 includes two groups of limiting structures. The two groups of limiting structures are arranged oppositely, and there is a gap between the two groups of limiting structures to facilitate the insertion of the manipulator. The space enclosed by the two groups of limiting structures is adapted to the shape of the base of the beam body.

[0011] Further, the positioning component 1 is provided on the top surface of the bottom plate 1, and a positioning ring is provided on the bottom surface of the bottom plate 1. An annular positioning boss 1 and an annular positioning boss 2 are provided on the top surface of the disassembly tray. When the bottom plate 1 is placed on the disassembly tray, the inner peripheral surface of the positioning ring is brought into contact with the outer peripheral surface of the annular positioning boss 1 or the inner peripheral surface of the positioning ring is brought into contact with the outer peripheral surface of the annular positioning boss 2, so as to position the position of the bottom plate 1 on the disassembly tray.

[0012] Furthermore, the overhaul tooling for the central traction beam further includes an assembly workpiece, which includes a second base plate and a second positioning assembly disposed on the second base plate. A second circular hole is formed in the second base plate; the second positioning assembly includes two arc blocks and at least three anti-rotation blocks. The two arc blocks are located on the same circumference, and the diameter of the circumference is greater than or equal to the outer diameter of the central traction beam body; during support, there is one of the mounting cylinders between the two anti-rotation blocks, and one end of the other mounting cylinder contacts at least one anti-rotation block; a third base plate is further disposed below the second base plate, and the third base plate is connected to the bottom surface of the second base plate through a connecting rod. A cylinder is further disposed on the third base plate, and the cylinder is located below the second base plate; the assembly workpiece further includes a central pin sleeve support column, and the central pin sleeve support column passes through the second base plate. The piston rod of the cylinder is connected to the central pin sleeve support column, and the central pin sleeve support column can be driven to move back and forth through the second base plate by the cylinder.

[0013] Furthermore, the central pin support column includes a first column body and a second column body fixedly connected to each other. The outer diameter of the first column body is greater than the outer diameter of the second column body; the first column body is connected to the piston rod of the cylinder, and the outer diameter of the second column body is adapted to the minimum inner diameter of the inner hole of the central pin sleeve; during support, the larger end of the inner hole of the central pin sleeve faces downward, the central pin sleeve is placed on the central pin sleeve support column, the central pin sleeve support is located on the first column body, and the second column body passes through the inner hole of the central pin sleeve and is located in the inner hole of the central pin sleeve.

[0014] Furthermore, the second column body and the first column body are detachably connected.

[0015] Furthermore, a support cylinder is installed in the second circular hole of the base plate. The central hole of the support cylinder is a non-circular hole, and the first column body of the central pin sleeve support column is also non-circular. The first column body passes through the central hole of the support cylinder.

[0016] Furthermore, the first column body is of a hollow structure, and the piston rod of the cylinder extends into the inner hole of the first column body, and the piston rod is fixedly connected to the top of the inner hole of the first column body.

[0017] The present invention also discloses an overhaul method for the central traction beam described above, including a central pin sleeve disassembly step: during disassembly, the B end of the central traction beam is placed downward on the first base plate. When the pressing head moves downward, first, the tapered portion is used to contact the inner hole of the central pin sleeve beam body to finely adjust the position of the central traction beam with the central pin sleeve installed, so that the central axis of the central pin sleeve coincides with the central axis of the first circular hole of the base plate. Then, the pressing head continues to move downward to contact the metal outer sleeve of the central pin sleeve to apply pressure, so as to withdraw the central pin sleeve from the central pin sleeve installation hole of the beam body.

[0018] Furthermore, the overhaul tooling for the central traction beam further includes an assembly workpiece, which includes a second base plate and a second positioning assembly disposed on the second base plate. A second circular hole is formed in the second base plate; the second positioning assembly includes two arc blocks and at least three anti-rotation blocks. The two arc blocks are located on the same circumference, and the diameter of the circumference is adapted to the outer diameter of the central traction beam body; when supporting, there is one of the installation cylinders between the two anti-rotation blocks, and one end of the other installation cylinder contacts at least one anti-rotation block; a third base plate is further disposed below the second base plate, and the third base plate is connected to the bottom surface of the second base plate through a connecting rod. A cylinder is further disposed on the third base plate, and the cylinder is located below the second base plate; the assembly workpiece further includes a central pin sleeve support column, and the central pin sleeve support column passes through the second base plate. The piston rod of the cylinder is connected to the central pin sleeve support column, and the cylinder can drive the central pin sleeve support column to move back and forth through the second base plate; The overhaul method further includes a central traction beam assembly step: during assembly, first place the A end of the central traction beam downward on the second base plate, then place the central pin sleeve on the central pin sleeve support column, and then apply a downward pressure to the central pin sleeve, so that the central pin sleeve and the central pin sleeve support column move downward together, and finally press-fit the central pin sleeve into the central pin sleeve installation hole of the central pin sleeve installation cylinder to complete the assembly; during the downward pressing process, the cylinder is always in a ventilated state.

[0019] The beneficial effects of the present invention are as follows: when disassembling the central pin sleeve in the present invention, through structural design, when the central traction beam is placed on the disassembly tray, the above-mentioned first positioning assembly can quickly place the central traction beam and perform rough positioning on the central traction beam, ensuring the smooth progress of subsequent overhaul work, improving the efficiency of overhaul work, and reducing the difficulty of overhaul work. By providing the cone portion on the inner hole circumferential surface of the circular pressing head, when the pressing head moves downward, it first contacts the inner hole of the central pin sleeve installation cylinder to form an automatic centering function of the axis. After centering, the pressing head is used to apply pressure, thereby completing the disassembly of the central pin sleeve and avoiding the problem of damage to the product during the disassembly of the central pin sleeve. When assembling the node, a cylinder is used to replace the spring to support the central pin sleeve support column. After the central pin sleeve is pressed and assembled, even if the downward pressure is released, the piston rod of the cylinder will not generate an upward moving force that causes the central pin sleeve support column to rebound. Therefore, the problem of misalignment caused by the rebound movement of the central pin sleeve is avoided; when applying lubricant, the piston rod of the cylinder can be directly controlled to contract in place, driving the central pin sleeve support column to move downward so that the inner circumferential surface of the support cylinder is exposed, without manual pressure, reducing the labor intensity of the operator; the service life of the cylinder is longer than that of the spring and the provided supporting force is constant and stable, improving the service life of the present invention. Description of the Drawings

[0020] Figure 1Schematic diagram of the position of the traction rod and the central traction beam; Figure 2 Schematic diagram of the structure of the central traction beam; Figure 3 Schematic diagram of the sectional view of the central traction beam; Figure 4 Schematic diagram of the structure of the workpiece to be disassembled; Figure 5 Sectional view of the workpiece to be disassembled; Figure 6 Schematic diagram of the structure of the first bottom plate and the first positioning component; Figure 7 Schematic diagram of the structure of the pressing head; Figure 8 For Figure 7 Enlarged view of part C; Figure 9 Schematic diagram of the structure of the first bottom plate and the positioning ring (viewed from the bottom); Figure 10 Schematic diagram of the structure of the disassembly tray; Figure 11 Schematic diagram of the structure of the assembled workpiece; Figure 12 Sectional view of the assembled workpiece; Figure 13 Schematic diagram of the cooperation between the center pin sleeve support column and the first bottom plate; Figure 14 Schematic diagram of the cooperation between the center pin sleeve support column and the first bottom plate (exploded view); In the figure: 1. Traction rod, 1a. Core shaft, 2. Central traction beam, 21. Beam body, 21a. Base, 21b. Center pin sleeve installation cylinder, 21c. Center frame, 21c1. Installation cylinder, 22. Center pin sleeve, 22a. Rubber layer, 22b. Metal outer sleeve, 22c. Inner hole, 3. Disassembly tray, 4. First bottom plate, 41. First round hole in the bottom plate, 5. First positioning component, 6. Circular pressing head, 61. Conical part, 7. Limit structure, 8. Positioning ring, 9. First annular positioning boss, 10. Second annular positioning boss, 11. Second bottom plate, 12. Second positioning component, 12a. Arc block, 12b. Anti-rotation block, 13. Second round hole in the bottom plate, 14. Third bottom plate, 15. Cylinder, 16. Center pin sleeve support column, 16a. First column body, 16b. Second column body, 17. Support cylinder. Specific embodiments

[0021] The technical solutions of the present invention will be further elaborated in detail below in conjunction with specific embodiments and the accompanying drawings.

[0022] Embodiment: A central traction beam maintenance tool for a node intelligent maintenance line, as Figure 4As shown in the figure, the overhaul tooling for the central traction beam 2 includes a disassembling workpiece and a pressing head. The disassembling workpiece includes a disassembling tray 3, a bottom plate 1 4, and a positioning component 1 5 disposed on the bottom plate 1 4. The bottom plate 1 4 is placed on the disassembling tray 3, and a circular hole 1 41 is formed in the bottom plate 1 4. The space enclosed by the positioning component 1 5 is adapted to the shape of the base 21a of the beam body 21, and the central axis of the space enclosed by the positioning component coincides with the central axis of the circular hole 1 41 in the bottom plate 1 4. The pressing head is an annular pressing head 6, and a tapered portion 61 is provided on the outer peripheral surface of the annular pressing head 6. The central axis of the annular pressing head 6 coincides with the central axis of the circular hole 1 41 in the bottom plate 1 4. The outer diameter of the annular pressing head 6 is less than or equal to the outer diameter of the metal outer sleeve 22b of the central pin sleeve 22, and the inner diameter of the annular pressing head 6 is greater than the outer diameter of the end face of the rubber layer 22a of the central pin sleeve 22. In this embodiment, when disassembling the central pin sleeve 22, through the above structural design, when the central traction beam 2 is placed on the disassembling tray 3, the central traction beam 2 can be quickly placed by using the above positioning component 1 5, and the central traction beam 2 is roughly positioned, ensuring the smooth progress of subsequent overhaul work, improving the efficiency of overhaul work, and reducing the difficulty of overhaul work.

[0023] When disassembling the central pin sleeve 22, the beam body 21 is roughly positioned through the space enclosed by the positioning component 1 5. Due to operational reasons, the central axis of the central pin sleeve 22 installed in the central pin sleeve installation cylinder 21b does not necessarily coincide with the central axis of the circular hole 1 41 in the bottom plate 1 4. Since the central pin sleeve 22 includes a metal outer sleeve 22b and a rubber layer 22a vulcanized and bonded to the metal outer sleeve 22b, at this time, if the pressing head is controlled to press down, the bottom of the annular pressing head 6 is likely to press on the rubber layer 22a of the central pin sleeve 22, causing damage to the product. Therefore, as Figure 8 shown in the figure, in this embodiment, a tapered portion 61 is provided on the inner hole peripheral surface of the annular pressing head 6. When the pressing head moves downward, first, the tapered portion 61 is used to contact the inner hole (i.e., the central pin sleeve installation hole) of the central pin sleeve installation cylinder 21b to finely position and adjust the position of the central traction beam 2 installed with the central pin sleeve 22, so that the central axis of the central pin sleeve 22 coincides with the central axes of the circular hole 1 41 in the bottom plate 1 4 and the pressing head. Then, the pressing head continues to move downward to contact the metal outer sleeve 22b of the central pin sleeve 22 to apply pressure, thereby withdrawing the central pin sleeve 22 from the central pin sleeve installation cylinder 21b. By providing the tapered portion 61 on the inner hole peripheral surface of the annular pressing head 6 in this embodiment, when the pressing head moves downward, it first contacts the inner hole of the central pin sleeve installation cylinder 21b to form an automatic centering function of the axis. After centering, the pressing head is used to apply pressure, thereby completing the disassembly of the central pin sleeve 22 and avoiding the problem of damage to the product during the disassembly of the central pin sleeve 22.

[0024] As Figure 6As shown, the first positioning component 5 includes two sets of limiting structures 7, which are arranged oppositely. There is a gap between the two sets of limiting structures 7 to facilitate the insertion of the manipulator. The space enclosed by the two sets of limiting structures 7 is adapted to the shape of the base 21a of the beam body 21. As Figure 6 shown, the distance between the two sets of limiting structures 7 is relatively large. A notch is left here to facilitate the mechanical gripper to pick up the central traction beam 2 from the disassembly tray 3 or to grab and place the central traction beam 2 onto the disassembly tray 3.

[0025] The first positioning component 5 is arranged on the top surface of the first bottom plate 4. As Figure 9 shown, a positioning ring 8 is arranged on the bottom surface of the first bottom plate 4; a first annular positioning boss 9 and a second annular positioning boss 10 are arranged on the top surface of the disassembly tray 3. When the first bottom plate 4 is placed on the disassembly tray 3, the inner peripheral surface of the positioning ring 8 is in contact with the outer peripheral surface of the first annular positioning boss 9 or the inner peripheral surface of the positioning ring 8 is in contact with the outer peripheral surface of the second annular positioning boss 10, so as to position the position of the first bottom plate 4 on the disassembly tray 3. In the node intelligent maintenance line, in order to adapt to node disassembly work of various specifications, when replacing nodes of different specifications for disassembly, the first bottom plate 4 and the disassembly tray 3 need to be disassembled and assembled. When the first bottom plate 4 is reinstalled on the disassembly tray 3, the above positioning structure can quickly and accurately realize the positioning of the bottom plate on the disassembly tray 3, further improving the efficiency of the maintenance work and reducing the difficulty of the maintenance work. In this application, the first annular positioning boss 9 and the second annular positioning boss 10 are respectively arranged on the disassembly tray 3. The functions of the two positioning bosses are the same and both can be used. In such a case, the nodes of two central traction beams 2 can be disassembled simultaneously. At the same time, in the production line, the disassembly tray 3 with this structure has universality and can be applicable to products of multiple structures at the same time; for example, when the product is relatively long and support positioning is required at both ends, there will be two positioning rings on the first bottom plate, which need to be cooperated with the two positioning bosses for positioning at the same time.

[0026] As Figure 11As shown, the overhaul tooling for the central towing beam 2 further includes an assembled workpiece, which includes a second base plate 11 and a second positioning assembly 12 arranged on the second base plate 11. A second circular hole 13 is formed in the second base plate 11; the second positioning assembly 12 includes two arc blocks 12a and at least three anti-rotation blocks 12b. The two arc blocks 12a are located on the same circumference, and the diameter of the circumference is adapted to the outer diameter of the beam body 21 of the central towing beam 2; during support, there is one installation cylinder between the two anti-rotation blocks 12b, and one end of the other installation cylinder contacts at least one anti-rotation block 12b; a third base plate 14 is also arranged below the second base plate 11. The third base plate 14 is connected to the bottom surface of the second base plate 11 through a connecting rod, and a cylinder 15 is also arranged on the third base plate 14. The cylinder 15 is located below the second base plate 11; the assembled workpiece further includes a central pin sleeve support column 16. The central pin sleeve support column 16 passes through the second base plate 11, and the piston rod of the cylinder 15 is connected to the central pin sleeve support column 16. The cylinder 15 can drive the central pin sleeve support column 16 to move back and forth through the second base plate 11.

[0027] The central pin sleeve support column 16 includes a first column body 16a and a second column body 16b that are fixedly connected to each other. The outer diameter of the first column body 16a is larger than the outer diameter of the second column body 16b; the first column body 16a is connected to the piston rod of the cylinder 15, and the outer diameter of the second column body 16b is adapted to the minimum inner diameter of the inner hole of the central pin sleeve 22; during support, the larger end of the inner hole of the central pin sleeve 22 faces downward. The central pin sleeve 22 is placed on the central pin sleeve support column 16. The central pin sleeve 22 is supported on the first column body 16a, and the second column body 16b passes through the inner hole of the central pin sleeve 22 and is located in the inner hole of the central pin sleeve 22. When installing the central pin sleeve 22, in order to avoid inaccurate positioning resulting in the pressing head pressing on the rubber layer 22a, it is also necessary to position the beam body 21 and the central pin sleeve 22. The beam body 21 is positioned by the circumference formed by the two arc blocks 12a of the second positioning assembly 12. Since the A end of the central pin sleeve installation cylinder 21b is a cylindrical surface, the present application also designs anti-rotation blocks 12b to prevent the beam body 21 from rotating during the press-fitting process. After placing the beam body 21, the central pin sleeve 22 is then placed on the central pin sleeve support column 16. The second column body 16b automatically positions the central pin sleeve 22, so that the center line of the central pin sleeve 22 is on the same straight line as the beam body 21 and the central pin sleeve support column 16, so that the pressing head accurately presses on the metal outer sleeve 22b of the central pin sleeve 22.

[0028] As Figure 13 shown, there are three anti-rotation blocks 12b in the present application. Both the anti-rotation blocks 12b and the arc blocks 12a are detachably connected to the second base plate 11. The second column body 16b and the first column body 16a are detachably connected, and different second column bodies 16b are replaced for different sizes of central pin sleeves 22.

[0029] AsFigure 14 As shown, a support cylinder 17 is installed in the second round hole 13 of the bottom plate. The central hole of the support cylinder 17 is a non-circular hole, and the first column body 16a of the central pin sleeve support column 16 is also non-circular. The first column body 16a passes through the central hole of the support cylinder 17. The central hole of the support cylinder 17 and the shape of the first column body 16a are both non-circular. In this embodiment, as Figure 14 shown, they are both spindle-shaped structures with round ends and a straight middle. The central hole of the support cylinder 17 has the same shape and size as the first column body 16a. This can prevent the central pin sleeve support column 16 from rotating during the assembly process.

[0030] The first column body 16a is a hollow structure. The piston rod of the air cylinder 15 extends into the inner hole of the first column body 16a and is fixedly connected to the top of the inner hole of the first column body 16a. Such a design can reduce the volume of the tooling.

[0031] During assembly, first place the beam body 21, then place the central pin sleeve 22 on the central pin sleeve support column 16. The second column body 16b automatically positions the central pin sleeve 22, and then apply a downward pressure to the central pin sleeve 22, so that the central pin sleeve 22 and the central pin sleeve support column 16 move downward together, and finally press the central pin sleeve 22 into the central pin sleeve 22 installation hole of the rotating joint installation cylinder to complete the assembly; during the downward pressing process, the air cylinder 15 is always in a ventilated state.

[0032] It should be particularly noted that in the prior art, some use springs to support the central pin sleeve support column 16. However, the applicant found that using springs would cause the following problems: First, during the downward movement of the central pin sleeve support column 16, the spring will be gradually compressed. As the compression degree gradually increases, the resilience of the spring also gradually increases. When the central pin sleeve 22 is pressed and installed and the downward pressure is released, at this time, due to the very large resilience of the spring, the central pin sleeve support column 16 will be pushed upward by the resilience of the spring, so that the central pin sleeve support column 16 and the central pin sleeve 22 will move upward together by a certain position, resulting in the problem of improper installation caused by the rebound movement of the central pin sleeve 22; Second, before assembly, lubricant is generally applied inside the support cylinder 17 to avoid scratching the support cylinder 17 during press-fitting. When applying lubricant, it is necessary to move the central pin sleeve support column 16 downward so that the inner peripheral surface of the support cylinder 17 is exposed for easy application. However, if the central pin sleeve support column 16 is connected by a spring, it is necessary to press hard to compress the spring in order to move the central pin sleeve support column 16 downward, increasing the labor intensity of the operator; Third, the spring is prone to aging and failure, resulting in changes in elasticity. After long-term use, it is easy to affect the assembly work and reduce the service life of this tooling.

[0033] In view of the above technical problems, the applicant replaces the spring with the air cylinder 15. After adopting the air cylinder 15, for the first problem above: when this embodiment is pressed down, the air cylinder 15 is always in the ventilated state. Due to the characteristics of the air cylinder 15 itself, regardless of the stroke of the piston rod, the magnitude of the acting force it provides remains unchanged. That is, during the downward movement of the center pin sleeve support column 16, the supporting force provided by the air cylinder 15 to the center pin sleeve support column 16 is constant. Therefore, as long as the force magnitude of the air cylinder 15 is designed well, after the center pin sleeve 22 is pressed down and assembled, even if the downward pressure is released, the piston rod of the air cylinder 15 will not generate an upward acting force that causes the center pin sleeve support column 16 to rebound, thus avoiding the problem of improper installation caused by the rebound movement of the center pin sleeve 22; After adopting the air cylinder 15, for the second problem above: when applying lubricant, the piston rod of the air cylinder 15 can be directly controlled to contract in place, driving the center pin sleeve support column 16 to move downward so that the inner peripheral surface of the support cylinder 17 is exposed, without the need for manual application of pressure, reducing the labor intensity of the operating workers; After adopting the air cylinder 15, for the third problem above: the service life of the air cylinder 15 is longer than that of the spring and the supporting force provided is permanently stable, improving the service life of this tooling.

[0034] In summary, when disassembling the center pin sleeve 22 in the present invention, through structural design, when the center traction beam 2 is placed on the disassembly tray 3, the above-mentioned positioning component one 5 can quickly place the center traction beam 2 well, perform rough positioning on the center traction beam 2, ensure the smooth progress of subsequent maintenance work, improve the efficiency of maintenance work, and reduce the difficulty of maintenance work. By providing the tapered portion 61 on the inner hole circumferential surface of the circular pressing head 6, when the pressing head moves downward, it first contacts the inner hole of the center pin sleeve installation cylinder 21b to form an automatic centering function of the axis line. After centering, the pressing head is used to apply pressure, thereby completing the disassembly of the center pin sleeve 22, avoiding the problem of damage to the product during the disassembly of the center pin sleeve 22. During the assembly node, the air cylinder 15 is used to replace the spring to support the center pin sleeve support column 16. After the center pin sleeve 22 is pressed down and assembled, even if the downward pressure is released, the piston rod of the air cylinder 15 will not generate an upward acting force that causes the center pin sleeve support column 16 to rebound, thus avoiding the problem of improper installation caused by the rebound movement of the center pin sleeve 22; when applying lubricant, the piston rod of the air cylinder 15 can be directly controlled to contract in place, driving the center pin sleeve support column 16 to move downward so that the inner peripheral surface of the support cylinder 17 is exposed, without the need for manual application of pressure, reducing the labor intensity of the operating workers; the service life of the air cylinder 15 is longer than that of the spring and the supporting force provided is permanently stable, improving the service life of the present invention.

[0035] The "multiple" mentioned in the embodiments refers to the quantity of "two or more". The above embodiments are only for illustrating the present invention and not for limiting the present invention. Those skilled in the relevant technical fields can still make various changes or transformations without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by each claim.

Claims

1. A central traction beam maintenance tool for a node intelligent maintenance line, the central traction beam comprising a beam body and a central pin sleeve, the beam body comprising a base, a central pin sleeve mounting cylinder and a central frame, the central pin sleeve mounting cylinder is provided with a central pin sleeve mounting hole, the central pin sleeve is located in the central pin sleeve mounting hole, and the central pin is installed in the central pin sleeve; the central frame is connected to the central pin sleeve mounting cylinder through an arc transition through an intermediate beam; characterized in that: The center traction beam maintenance tool includes a disassembly workpiece and a pressure head, and the disassembly workpiece includes a disassembly pallet, a base plate and a positioning component arranged on the base plate. The base plate is placed on the disassembly pallet, and a base plate circular hole is opened on the base plate. The space enclosed by the positioning component is adapted to the base shape of the beam body, and the central axis of the space enclosed by the positioning component is in the same straight line as the central axis of the base plate circular hole. The pressure head is an annular pressure head, and a cone is arranged on the outer peripheral surface of the annular pressure head. The central axis of the annular pressure head coincides with the central axis of the base plate circular hole. The outer diameter of the annular pressure head is less than or equal to the outer diameter of the metal jacket of the center pin sleeve, and the inner diameter of the annular pressure head is greater than the outer diameter of the end face of the rubber layer of the center pin sleeve.

2. The central traction beam maintenance tool according to claim 1 is characterized in that: The positioning component 1 includes two sets of limiting structures, which are arranged opposite to each other. There is a gap between the two sets of limiting structures to facilitate the robot to extend into, and the space surrounded by the two sets of limiting structures is adapted to the base shape of the beam body.

3. The central traction beam maintenance tool according to claim 1 is characterized in that: The positioning component 1 is arranged on the top surface of the base plate 1, and a positioning ring is arranged on the bottom surface of the base plate 1; an annular positioning boss 1 and an annular positioning boss 2 are arranged on the top surface of the disassembly tray. When the base plate 1 is placed on the disassembly tray, the inner circumference of the positioning ring is in contact with the outer circumference of the annular positioning boss 1 or the inner circumference of the positioning ring is in contact with the outer circumference of the annular positioning boss 2, so as to position the base plate 1 on the disassembly tray.

4. The central traction beam maintenance tool according to any one of claims 1 to 3, characterized in that: The center traction beam maintenance tool also includes an assembly workpiece, which includes a base plate 2 and a positioning component 2 arranged on the base plate 2, and a base plate circular hole 2 is opened on the base plate 2; the positioning component 2 includes two arc blocks and at least three anti-rotation blocks, the two arc blocks are located on the same circumference, and the diameter of the circumference is adapted to the outer diameter of the center traction beam body; when supported, there is a mounting cylinder between the two anti-rotation blocks, and one end of the other mounting cylinder is in contact with at least one anti-rotation block; a base plate 3 is also arranged at the lower position of the base plate 2, the base plate 3 is connected to the bottom surface of the base plate 2 by a connecting rod, and a cylinder is also arranged on the base plate 3, and the cylinder is located at the lower position of the base plate 2; the assembly workpiece also includes a center pin sleeve support column, the center pin sleeve support column passes through the base plate 2, the piston rod of the cylinder is connected to the center pin sleeve support column, and the center pin sleeve support column can be driven by the cylinder to move back and forth through the base plate 2.

5. The central traction beam maintenance tool according to claim 4 is characterized in that: The center pin support column includes a column one and a column two that are fixedly connected to each other, the outer diameter of column one is larger than the outer diameter of column two; column one is connected to the piston rod of the cylinder, and the outer diameter of column two is matched with the minimum inner diameter of the inner hole of the center pin sleeve; when supporting, the larger end of the inner hole of the center pin sleeve is facing downward, the center pin sleeve is placed on the center pin sleeve support column, the center pin sleeve support is located on column one, and column two passes through the inner hole of the center pin sleeve and is located in the inner hole of the center pin sleeve.

6. The central traction beam maintenance tool according to claim 5 is characterized in that: The second column is detachably connected to the first column.

7. The central traction beam maintenance tool according to claim 5 is characterized in that: A support tube is installed in the second circular hole of the bottom plate, the center hole of the support tube is a non-circular hole, and the column body 1 of the center pin sleeve support column is also non-circular, and the column body 1 passes through the center hole of the support tube.

8. The central traction beam maintenance tool according to claim 5 is characterized in that: The column body 1 is a hollow structure, the piston rod of the cylinder extends into the inner hole of the column body 1, and the piston rod is fixedly connected to the top of the inner hole of the column body 1.

9. A method for repairing a central traction beam according to claim 1, characterized in that: The method comprises the steps of disassembling the center pin sleeve: during disassembly, the B end of the center traction beam is placed downward on the bottom plate; when the pressure head moves downward, the cone portion is first used to contact the inner hole of the center pin sleeve beam body, and the position of the center traction beam with the center pin sleeve installed is finely adjusted so that the center axis of the center pin sleeve coincides with the center axis of the bottom plate circular hole one; then the pressure head is further moved downward to contact the metal outer sleeve of the center pin sleeve to apply pressure, thereby withdrawing the center pin sleeve from the center pin sleeve installation hole of the beam body.

10. The central traction beam maintenance method according to claim 9, characterized in that: The center traction beam maintenance tool also includes an assembly workpiece, which includes a base plate 2 and a positioning component 2 arranged on the base plate 2, and a base plate circular hole 2 is opened on the base plate 2; the positioning component 2 includes two arc blocks and at least three anti-rotation blocks, the two arc blocks are located on the same circumference, and the diameter of the circumference is greater than or equal to the outer diameter of the center traction beam body; when supported, there is a mounting cylinder between the two anti-rotation blocks, and one end of the other mounting cylinder is in contact with at least one anti-rotation block; a base plate 3 is also arranged at the lower position of the base plate 2, the base plate 3 is connected to the bottom surface of the base plate 2 by a connecting rod, and a cylinder is also arranged on the base plate 3, and the cylinder is located at the lower position of the base plate 2; the assembly workpiece also includes a center pin sleeve support column, the center pin sleeve support column passes through the base plate 2, the piston rod of the cylinder is connected to the center pin sleeve support column, and the center pin sleeve support column can be driven by the cylinder to move back and forth through the base plate 2; The maintenance method also includes a center traction beam assembly step: during assembly, first place the center traction beam A end downward on the bottom plate 2, then place the center pin sleeve on the center pin sleeve support column, and then apply downward pressure to the center pin sleeve, so that the center pin sleeve and the center pin sleeve support column move downward together, and finally press the center pin sleeve into the center pin sleeve mounting hole of the center pin sleeve mounting tube to complete the assembly; during the downward pressure process, the cylinder is always in a ventilated state.

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