Traction rod overhauling tool and method for intelligent node overhauling line

Abstract

The invention discloses a traction rod maintenance tool and maintenance method for a node intelligent maintenance line, the traction rod maintenance tool comprises a dismounting workpiece, the dismounting workpiece comprises a dismounting tray and a positioning assembly arranged on the dismounting tray, the positioning assembly comprises a first bottom plate, a first supporting cylinder and a first supporting frame, the first supporting cylinder and the first supporting frame are arranged on the first bottom plate, the first supporting cylinder is used for supporting the node installation end at one end of the traction rod, and the first supporting frame is used for supporting the node installation end at the other end of the traction rod. Through the structural design, the traction pull rod can be quickly positioned, and smooth proceeding of follow-up maintenance work is guaranteed. The device further comprises a pressing head which is an annular pressing head, the central axis of the annular pressing head coincides with the central axis of the first supporting cylinder, and a conical part at the end of the annular pressing head extends into the node mounting hole to enable the pull rod node to be automatically centered. And the annular pressure head can be ensured to be accurately contacted with the metal jacket to withdraw the pull rod node without damaging the rubber part of the pull rod node.

Description

Technical Field

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

[0002] For a rail vehicle, its car body bogie uses a traction pin device in cooperation with double traction rods to transmit longitudinal force. The two traction rods are arranged in an inclined symmetry (Z-shaped) relative to the center pin of the traction pin device. As Figure 1 shown, one end of the traction rod 1 is connected to the center frame 2 of the traction pin device, and the other end is connected to the bogie frame (the bogie frame is not shown in the figure).

[0003] As Figure 2 shown, a traction rod includes a rod body 1a and a rod node 1b. Both ends of the rod body 1a are respectively node installation ends. The node installation ends include a first node installation end 1a1 that is arc-transitionally connected to one end of the rod body 1a, and a second node installation end 1a2 that is arc-transitionally connected to the other end of the rod body 1a. Both the first node installation end 1a1 and the second node installation end 1a2 are cylindrical. The first node installation end 1a1 is connected to the center frame 2, and the second node installation end 1a2 is connected to the frame. The first node installation end 1a1 and the second node installation end 1a2 are provided with node installation holes 1a3 of the same size, and the same-sized rod nodes 1b can be installed; it should be noted that the central axes of the cylindrical first node installation end 1a1 and the cylindrical second node installation end 1a2 are perpendicular to each other. Correspondingly, the central axes of the two node installation holes 1a3 are also perpendicular to each other. The purpose of such a setting is that the traction rod 1 is elastically connected to the center frame 2 and the frame respectively, and the installation planes at both ends are perpendicular to each other. As Figure 3 shown, it is a connection schematic diagram of two traction rods and the center frame 2 of the traction pin device. We can see that the shapes of the first node installation end 1a1 and the second node installation end 1a2 are different. The first node installation end 1a1 is a complete cylinder, and there are two planes on the circumference of the second node installation end 1a2 because the arc surface of the second node installation end 1a2 needs to contact the frame during installation, and plane contact is more fitting. And the arc surface of the first node installation end 1a1 does not contact the center frame 2. As Figure 1 shown, the first node installation end 1a1 is located between two mounting seats of the center frame 2. As Figure 4 shown, it is a structural schematic diagram of the rod node 1b of the traction rod 1. The structure of the rod node from the inside to the outside sequentially includes a core shaft 1b1, a rubber layer 1b2, and a metal outer sleeve 1b3. The core shaft 1b1 extends from both ends, and mounting holes connected to the center frame 2 or the frame are opened at both ends of the core shaft 1b1.

[0004] In actual work, as the working time increases, the traction rod 1, especially the rod node, 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 rod node from the traction rod for maintenance to ensure the stability, safety, and smoothness of the vehicle during operation.

[0005] When disassembling the rod node from the node mounting hole at the node mounting end, generally, the rod node is placed on the tooling, and then the press head is used to press down to withdraw the rod node from the node mounting end. As can be seen from the above analysis, both ends of the rod body of the traction rod are perpendicular cylindrical structures, and rod nodes extending from the cylinders are respectively installed at both ends. When placing the traction rod on the tooling, it is necessary to ensure the accuracy of the position of the traction rod on the tooling to avoid damaging the rubber layer of the rod node 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 for the time being.

[0007] In summary, how to design a maintenance tooling and maintenance method for the traction rod of the node intelligent maintenance line to ensure the smooth progress of the traction rod 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 traction rod of the node intelligent maintenance line to ensure the smooth progress of the traction rod 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 traction rod maintenance tooling for a node intelligent maintenance line. The traction rod includes a rod body and a rod node. Both ends of the rod body are respectively node installation ends. The node installation ends include a first node installation end and a second node installation end. The first node installation end is connected to the center frame, and the second node installation end is connected to the framework. The first node installation end and the second node installation end are provided with node installation holes of the same size, and the same-sized rod nodes can be installed. The central axes of the cylindrical first node installation end and the cylindrical second node installation end are perpendicular to each other. Correspondingly, the central axes of the two node installation holes are also perpendicular to each other. The traction rod maintenance tooling includes a disassembly workpiece. The disassembly workpiece includes a disassembly tray and a positioning component arranged on the disassembly tray. The positioning component includes a first bottom plate and a first support cylinder and a first support frame arranged on the first bottom plate. The first support cylinder and the first support frame are respectively used to support the two node installation ends of the traction rod. The first support cylinder includes a cylinder body. Two circular grooves of different sizes are opened in the cylinder body. The larger circular groove is greater than or equal to the outer diameter of the node installation end, and the inner diameter of the smaller circular groove is greater than or equal to the outer diameter of the rod node core. The first support frame includes a fixed block and a limiting structure installed on the fixed block. The fixed block is vertically installed on the first bottom plate. The fixed block includes a support block fixed on the first bottom plate and two baffle plates on both sides of the support block. The limiting structure is fixed on the outside of the support block. When supporting, one node installation end is located on the first support cylinder; the other node installation end is located on the support block and between the two baffle plates. The limiting structure is located at the end of the traction rod. The rod node is supported on the two baffle plates, thereby completing the positioning of the first node installation end and the second node installation end.

[0010] Further, the height of the limiting structure is greater than that of the baffle plate. The limiting structure is arc-transitionally connected to the support block, so that the first support frame is applicable to traction rods of different lengths.

[0011] Further, when supporting, the contact surface between the node installation end and the top surface of the smaller circular groove of the first support cylinder is called the first contact surface; the other node installation end is in contact with the first support frame, which is called the second contact surface. The height of the first contact surface is always greater than the height of the second contact surface.

[0012] Further, the first support cylinder is arranged on the top surface of the first bottom plate. A positioning ring and an arc-shaped positioning block are arranged on the bottom surface of the first bottom plate; on the top surface of the disassembly tray, there are a first annular positioning boss and a second annular positioning boss. When the first bottom plate is placed on the disassembly tray, the inner peripheral surface of the positioning ring is in contact with the outer peripheral surface of the first annular positioning boss, and the arc surface of the arc-shaped positioning block is in contact with the outer peripheral surface of the second annular positioning boss, thereby positioning the position of the first bottom plate on the disassembly tray.

[0013] Furthermore, the arc-shaped positioning block is detachably connected to the bottom surface of the first base plate through a connecting member.

[0014] Further, the workpiece for disassembly further includes a pressing head, which is an annular pressing head. A conical 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 first support cylinder.

[0015] Furthermore, the width of the inner hole of the pressing head is adapted to the flat width of the mandrel so that the central axis of the inner hole of the pressing head coincides with the central axis of the mandrel; or the inner diameter of the pressing head is adapted to the round and square outer diameter of the mandrel so that the central axis of the inner hole of the pressing head coincides with the central axis of the mandrel.

[0016] Further, the overhaul tooling for the traction pull rod further includes an assembling workpiece, which includes a second base plate, a second support cylinder and a second support frame arranged on the second base plate. The first support cylinder and the first support frame are respectively used to support the two node mounting ends of the traction pull rod; A third base plate is further arranged below the second base plate. The third base plate is connected to the bottom surface of the second base plate through a connecting rod. An air cylinder is further arranged on the third base plate. The air cylinder is located below the second support cylinder; The assembling workpiece further includes a mandrel support column, which is arranged inside the second support cylinder. The piston rod of the air cylinder is connected to the mandrel support column, and the air cylinder can drive the mandrel support column to move back and forth through the second support cylinder.

[0017] Further, a limiting groove matching the shape of the end of the mandrel of the traction pull rod is arranged on the top surface of the mandrel support column, and both the mandrel support column and the limiting groove are designed to be non-circular.

[0018] The present invention also discloses an overhaul method for the above-mentioned traction pull rod, including a step of disassembling the pull rod node: during disassembly, when the pressing head moves downward, first use the conical portion to contact the inner hole of the mounting end of the traction pull rod node to finely adjust the position of the mounting end of the node with the pull rod node installed, so that the central axis of the pull rod node coincides with the central axis of the first support cylinder, and then continue to move the pressing head downward to contact the metal outer sleeve of the traction pull rod to apply pressure, so as to withdraw the pull rod node from the node mounting hole of the mounting end of the node.

[0019] Furthermore, the overhaul tooling for the traction pull rod further includes an assembly workpiece, which includes a second base plate, a second support cylinder arranged on the second base plate, and a second support frame. The first support cylinder and the first support frame are respectively used to support the two node mounting ends of the traction pull rod. A third base plate is further arranged below the second base plate. The third base plate is connected to the bottom surface of the second base plate through a connecting rod. A cylinder is further arranged on the third base plate. The cylinder is located below the second support cylinder. The assembly workpiece further includes a core shaft support column, which is arranged inside the second support cylinder. The piston rod of the cylinder is connected to the core shaft support column. The core shaft support column can be driven by the cylinder to move back and forth through the second support cylinder. The overhaul method further includes the traction pull rod assembly step: during assembly, first place the pull rod body, then place the pull rod node on the core shaft support column, and then apply a downward pressure to the pull rod node, so that the pull rod node and the core shaft support column move downward together, and finally press the pull rod node into the node mounting hole of the pull rod node mounting end to complete the assembly. During the downward pressing process, the cylinder is always in the ventilated state.

[0020] The beneficial effects of the present invention are as follows: when disassembling the pull rod node of the present invention, through the structural design, when the traction pull rod is placed on the first base plate or the second base plate, the above-mentioned support cylinder and support frame can be used to quickly support and position the traction pull rod, ensuring the smooth progress of the subsequent overhaul work, improving the efficiency of the overhaul work, and reducing the difficulty of the overhaul work. When disassembling the node, by setting the cone portion on the outer circumferential surface of the pressing head, when the pressing head moves downward, it first contacts the central hole of the node mounting hole to form an automatic centering function of the axis. After centering, the pressing head is used to apply pressure, so as to complete the disassembly of the pull rod node, avoiding the problem of damage to the product during the process of disassembling the pull rod node. When assembling the pull rod node, a cylinder is used to replace the spring to support the core shaft support column. After the pull rod node is pressed and assembled, even if the downward pressure is released, the piston rod of the cylinder will not generate an upward acting force that makes the core shaft support column rebound, thus avoiding the problem of misalignment caused by the rebound movement of the pull rod node. When applying lubricant, the piston rod of the cylinder can be directly controlled to contract in place, driving the core shaft support column to move downward so that the inner circumferential surface of the second 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

[0021] Figure 1 Schematic diagram of the position of the traction pull rod and the center frame; Figure 2 Schematic diagram of the structure of the traction pull rod; Figure 3 Schematic diagram of the structure of the pull rod body; Figure 4 Schematic diagram of the tie rod node structure of the traction tie rod Figure 5 Schematic diagram of the workpiece disassembly structure Figure 6 Cross-sectional view of the workpiece disassembly Figure 7 Schematic diagram of the structure of the pressure head Figure 8 is Figure 7 Enlarged view of part A of Figure 9 Schematic diagram of the positioning component structure Figure 10 Schematic diagram of the positioning component structure (viewed from the bottom) Figure 11 Schematic diagram of the disassembly tray structure Figure 12 Schematic diagram of the assembled workpiece structure Figure 13 Cross-sectional view of the assembled workpiece Figure 14 Schematic diagram of the cooperation of the mandrel, the mandrel support column structure and the second support column Figure 15 Schematic diagram of the mandrel support column and the second support column structure Figure 16 Schematic diagram of the structure of the node pressing head

[0022] In the figure: 1. Traction tie rod, 1a. Tie rod body, 1a1. First node installation end, 1a2. Second node installation end, 1a3. Node installation hole, 1b. Tie rod node, 1b1. Mandrel, 1b2. Rubber layer, 1b3. Metal outer sleeve, 2. Center frame, 3. Disassembly tray, 4. First bottom plate, 5. First support cylinder, 51. Larger circular groove, 52. Smaller circular groove, 6. First support frame, 61a. Support block, 61b. Baffle, 62. Limiting structure, 7. Notch, 8. Positioning ring, 9. Arc-shaped positioning block, 10. First annular positioning boss, 11. Second annular positioning boss, 12. Circular pressure head, 13. Cone part, 14. Second bottom plate, 15. Second support cylinder, 16. Second support frame, 17. Third bottom plate, 18. Cylinder, 19. Mandrel support column, 20. Limiting groove, 21. Node pressing head, 21a. Circular body, 21b. Circular protrusion Specific embodiments

[0023] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments and the accompanying drawings

[0024] Embodiment: A traction tie rod maintenance tool for a node intelligent maintenance line, including a workpiece disassembly, such as Figure 5As shown in the figure, the workpiece to be disassembled includes a disassembly tray 3 and a positioning component arranged on the disassembly tray 3. The positioning component includes a first bottom plate 4, a first support cylinder 5 and a first support frame 6 arranged on the first bottom plate 4. The first support cylinder 5 and the first support frame 6 are respectively used to support the two node installation ends of the traction pull rod 1. The first support cylinder 5 includes a cylinder body, and two circular grooves with different sizes are opened in the cylinder body. The larger circular groove 51 is greater than or equal to the outer diameter of the node installation end, and the inner diameter of the smaller circular groove 52 is greater than or equal to the outer diameter of the core shaft 1b1 of the pull rod node 1b. The first support frame 6 includes a fixing block and a limiting structure 62 installed on the fixing block. The fixing block is vertically installed on the first bottom plate 4. The fixing block includes a support block 61a fixed on the first bottom plate 4 and two baffle plates 61b located on both sides of the support block 61a. The limiting structure 62 is fixed on the outer side of the support block 61a. As Figure 5 , 6 shown, during support, one node installation end is located on the first support cylinder 5; the other node installation end is located on the support block 61a and between the two baffle plates 61b. The limiting structure 62 is located at the end of the traction pull rod 1, and the pull rod node 1b is supported on the two baffle plates 61b; thus, the positioning of the first node installation end 1a1 and the second node installation end 1a2 is completed. In this embodiment, when disassembling the pull rod node 1b, through the above structural design, when the traction pull rod 1 is placed on the positioning component, the above first support cylinder 5 and the first support frame 6 can be used to accurately position the position of the traction pull rod 1 placed on the positioning component, ensuring the smooth progress of subsequent maintenance work, improving the efficiency of maintenance work, and reducing the difficulty of maintenance work.

[0025] The traction pull rod 1 described in this application includes two node installation ends. During maintenance, the pull rod nodes 1b at both ends need to be disassembled and reinstalled. The sizes of the two node installation ends are the same, and the sizes of the pull rod nodes 1b are also the same. The same equipment and methods are used for disassembling and reinstalling the pull rod nodes 1b at both ends. The first support cylinder 5 includes two circular grooves with different sizes to roughly position the node installation end. As Figure 5 , 9 shown, the node installation end is placed on the larger circular groove 51, and the core shaft 1b1 extends into the smaller circular groove 52. The inner diameter of the smaller circular groove 52 is smaller than the outer diameter of the node installation end. In this embodiment, taking the disassembly of the pull rod node 1b of the second node installation end 1a2 as an example, that is, in this embodiment, the second node installation end 1a2 is placed on the first support cylinder 5, and the first node installation end 1a1 is placed on the first support frame 6.

[0026] The height of the limiting structure 62 is greater than that of the baffle 61b. The limiting structure 62 is arc-transitionally connected to the support block 61a, so that the first support frame 6 is applicable to traction pull rods 1 of different lengths. The arc surface of the node installation end is a rough machining surface, that is, the size of the arc surface of the node installation end is not so precise. To solve this technical problem and make this tooling applicable to traction pull rods 1 of different lengths, the limiting structure 62 and the support block 61a are cleverly set to be arc-transitionally connected. The node installation end can be in line contact with any position at the arc transition.

[0027] During support, the connection between the node installation end and the top surface of the smaller circular groove 52 of the first support cylinder 5 is called the first contact surface; the other node installation end is in contact with the first support frame 6, which is called the second contact surface; the height of the first contact surface is always greater than that of the second contact surface; the "height" refers to the height from the contact surface to the upper surface of the first bottom plate 4. From the analysis in the previous paragraph, it is known that the size of the arc surface of the node installation end is not so precise. Theoretically, when the traction pull rod 1 is placed on a horizontal plane, the bottom plane of the second node installation end 1a2 should be flush with the line contact surface of the arc surface of the first node installation end 1a1. However, due to the rough machining of the arc surface, it may cause the second node installation end 1a2 to warp, which will lead to inaccurate stamping positions and damage the node rubber layer 1b2 when disassembling the node. To avoid this situation, the placement position of the first node installation end 1a1 should always be lower than that of the second node installation end 1a2. Since it is the second node installation end 1a2 that is being stamped, a slight warp of the first node installation end 1a1 will not affect the stamping quality.

[0028] As Figure 9 shown, the first support cylinder 5 is detachably connected to the first bottom plate 4. By setting it as a detachable structure, various different specifications of the first support cylinder 5 can be replaced, so as to be applicable to the positioning of node installation ends of various specifications, improving the versatility. As Figure 9 shown, a notch 7 is also provided on the first support cylinder 5. Leaving a notch 7 here is to facilitate the mechanical gripper to pick up the pull rod body 1a from the disassembly tray 3 or grab and place the traction pull rod 1 onto the disassembly tray 3.

[0029] As Figure 9 、 10 shown, the first support cylinder 5 is arranged on the top surface of the first bottom plate 4, and a positioning ring 8 and an arc-shaped positioning block 9 are arranged on the bottom surface of the first bottom plate 4; as Figure 11As shown in the figure, an annular positioning boss one 10 and an annular positioning boss two 11 are provided on the top surface of the disassembly tray 3. After the bottom plate one 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 annular positioning boss one 10, and the arc surface of the arc positioning block 9 is in contact with the outer peripheral surface of the annular positioning boss two 11, so as to position the position of the bottom plate one 4 on the disassembly tray 3.

[0030] In the node intelligent maintenance line, in order to adapt to the disassembly work of nodes of various specifications, when replacing nodes of different specifications (the nodes in this application are tie rod nodes 1b) for disassembly, the bottom plate one 4 and the disassembly tray 3 need to be disassembled and assembled. When the bottom plate one 4 is reinstalled on the disassembly tray 3, the positioning of the bottom plate on the disassembly tray 3 can be quickly and accurately realized through the above positioning structure, which further improves the efficiency of the maintenance work and reduces the difficulty of the maintenance work. The arc positioning block 9 is detachably connected to the bottom surface of the bottom plate one 4 through a connecting piece such as a screw, so that the position of the arc positioning block 9 on the bottom surface of the bottom plate one 4 can be flexibly adjusted. Therefore, after the position of the positioning ring 8 is determined, the position of the arc positioning block 9 on the bottom surface of the bottom plate one 4 can be finely adjusted according to the actual working conditions, so that the arc surface of the arc positioning block 9 is more accurately attached to the outer peripheral surface of the annular positioning boss two 11 to form a positioning structure, further improving the positioning accuracy of the bottom plate one 4 on the disassembly tray 3.

[0031] As Figure 5 shown, the disassembled workpiece further includes a pressing head, and the pressing head is a circular pressing head 12. A conical part 13 is provided on the outer peripheral surface of the circular pressing head 12, and the central axis of the circular pressing head 12 coincides with the central axis of the support cylinder one 5. After the support cylinder one 5 supports the node installation end two 1a2 of the traction tie rod 1, the bottom of the node installation end two 1a2 is placed on the support cylinder one 5. Due to operational reasons, the central axis of the tie rod node 1b installed in the node installation end two 1a2 does not necessarily coincide with the central axis of the support cylinder one 5. Since the tie rod node 1b includes a metal outer sleeve 1b3 and a rubber layer 1b2 vulcanized and bonded to the metal outer sleeve 1b3, at this time, if the pressing head is controlled to press down, the bottom of the positioning pressing head is likely to press the rubber layer 1b2, causing damage to the product. Therefore, in this embodiment, a conical part 13 is provided on the outer peripheral surface of the positioning pressing head. When the pressing head moves down, first, the conical part 13 is in contact with the inner hole of the node installation hole 1a3 of the tie rod body 1a to finely adjust the position of the node installation end two 1a2 where the tie rod node 1b is installed, so that the central axis of the tie rod node 1b coincides with the central axis of the support cylinder one 5. Then, the pressing head continues to move down to be in contact with the metal outer sleeve 1b3 of the tie rod node 1b to apply pressure, so as to withdraw the tie rod node 1b from the node installation hole 1a3 of the node installation end two. As Figure 4As shown, for the traction rod 1 described in the present application, neither the metal outer sleeve 1b3 nor the rubber layer 1b2 extends out of the node mounting hole 1a3, and the height of the node mounting hole 1a3 is greater than the heights of the metal outer sleeve 1b3 and the rubber layer 1b2. Taking advantage of this feature, the present application provides a tapered portion 13 at the end of the press head. The chamfer angle α of the tapered portion 13 is in the range of 5° to 10°, as Figure 7 shown. In this embodiment, by providing the tapered portion 13 on the outer circumferential surface of the press head, when the press head moves downward, it first contacts the inner hole of the node mounting hole 1a3 to form an automatic centering function of the axis. After centering, the press head is used to apply pressure, thereby completing the disassembly of the tie rod node 1b, avoiding the problem of damage to the product during the disassembly of the tie rod node 1b.

[0032] The width of the inner hole of the press head is adapted to the flat width of the mandrel 1b1 so that the central axis of the inner hole of the press head coincides with the central axis of the mandrel 1b1; or the inner diameter of the press head is adapted to the round-square outer diameter of the mandrel 1b1 so that the central axis of the inner hole of the press head coincides with the central axis of the mandrel 1b1. To further ensure the automatic centering of the tie rod node 1b, according to the shape of the mandrel 1b1 of the tie rod node 1b, the present application sets the shape of the inner hole of the circular press head 12 to match the shape of the end of the mandrel 1b1. The mandrel 1b1 of the tie rod node 1b in the present application, as Figure 4 shown, includes a flat square and a round square. The shape of the inner hole of the press head can be set according to the flat square, or according to the round square, or the shape of the inner hole of the press head can be set to a shape that is adapted to both the flat square and the round square.

[0033] As Figure 12 shown, the overhaul tooling for the traction rod 1 further includes an assembly workpiece. The assembly workpiece includes a second base plate 14, a second support cylinder 15 provided on the second base plate 14, and a second support frame 16. The first support cylinder 5 and the first support frame 6 are respectively used to support the two node mounting ends of the traction rod 1. In this embodiment, taking the tie rod node 1b of the first node mounting end 1a1 as an example, Figure 12 in which, the first node mounting end 1a1 is located on the second support cylinder 15, and the second node mounting end 1a2 is located on the second support frame 16; a third base plate 17 is further provided below the second base plate 14. The third base plate 17 is connected to the bottom surface of the second base plate 14 through a connecting rod. A cylinder 18 is further provided on the third base plate 17. The cylinder 18 is located below the second support cylinder 15; the assembly workpiece further includes a mandrel support column 19. The mandrel support column 19 is provided inside the second support cylinder 15. The piston rod of the cylinder 18 is connected to the mandrel support column 19. The cylinder 18 can drive the mandrel support column 19 to move back and forth through the second support cylinder 15. The second support cylinder 15 has the same structure as the first support cylinder 5, and the second support frame 16 has the same structure as the first support frame 6.

[0034] As Figure 14, 15 As shown, a limiting groove 20 matching the shape of the end of the mandrel 1b1 of the traction pull rod 1 is provided on the top surface of the mandrel support column 19, which facilitates placing the pull rod node 1b on the mandrel support column 19 during assembly. Both the mandrel support column 19 and the limiting groove 20 are designed to be non-circular. In this embodiment, as Figure 15 shown, the limiting groove 20 is a waist-shaped groove with round ends and a straight middle, and its shape and size are the same as those of the end of the mandrel 1b1. When assembling the pull rod node 1b into the node installation hole 1a3, the manipulator places the pull rod node 1b on the mandrel support column 19, and the end of the pull rod node 1b just inserts into the limiting groove 20 with the same shape and size, directly completing the positioning of the pull rod node 1b. The mandrel support column 19 is also a waist-shaped groove with round ends and a straight middle, which can prevent the mandrel support column 19 and the pull rod node 1b from rotating during the assembly process. During assembly, first place the pull rod body 1a, then place the pull rod node 1b on the mandrel support column 19, and then apply a downward pressure to the pull rod node 1b, so that the pull rod node 1b and the mandrel support column 19 move downward together, and finally press the pull rod node 1b into the node installation hole 1a3 at the installation end of the pull rod node 1b to complete the assembly; during the downward pressing process, the air cylinder 18 is always in the ventilated state. During assembly, before applying pressure to the pull rod node 1b, the limiting groove 20 has positioned the pull rod node 1b, so there is no need to rely on the pressure head for positioning as when disassembling the node. The pressure heads used for installing the node and pressing the node in this application are different. The node installation pressure head 21 is also an annular pressure head 12, including an annular body 21a and an annular protrusion 21b protruding from the end of the annular body 21a. The outer diameter of the annular protrusion 21b is smaller than the inner diameter of the node installation end. When pressing the pull rod node 1b, the annular protrusion 21b contacts the metal outer sleeve 1b3 of the pull rod node 1b. When the node installation pressure head 21 moves downward, the mandrel 1b1 extends into the inner hole of the node installation pressure head 21, and the annular protrusion 21b contacts and presses the metal outer sleeve 1b3 to press the pull rod node 1b into the node installation hole 1a3.

[0035] It should be particularly noted that in the prior art, some use springs to support the mandrel support column 19, but the applicant found that using springs would cause the following problems: First, during the downward movement of the mandrel support column 19, the spring will be gradually compressed. As the compression degree gradually increases, the resilience of the spring also gradually increases. When the pressing of the pull rod node 1b is completed and the downward pressure is released, at this time, due to the very large resilience of the spring, the mandrel support column 19 will be pushed upward by the resilience of the spring, so that the mandrel support column 19 and the pull rod node 1b will move upward together in the opposite direction by a certain position, resulting in the problem of incomplete installation caused by the rebound movement of the pull rod node 1b; Second, before assembly, lubricant is usually applied to the inside of the support tube 15 to avoid scratching the support tube 15 during press-fitting. When applying lubricant, the tie rod node 1b needs to be moved down to expose the inner circumference of the support tube 15 for easy application. However, if the core shaft support column 19 is connected to a spring, it is necessary to press hard to compress the spring before the core shaft support column 19 can be moved down, which increases the labor intensity of the operator; 3. The spring is prone to aging and failure, resulting in changes in elastic force. After being used for too long, it is easy to affect the assembly work and reduce the service life of the tooling.

[0036] In view of the above technical problems, the applicant changed to a cylinder 18 to replace the spring. After adopting the cylinder 18, the first problem mentioned above is addressed: when the present embodiment is pressed downward, the cylinder 18 is always in a ventilated state. Due to the characteristics of the cylinder 18 itself, no matter how long the piston rod has a stroke, the magnitude of the force it provides remains unchanged, that is, in the process of the core shaft support column 19 moving downward, the supporting force provided by the cylinder 18 to the core shaft support column 19 is constant. Therefore, as long as the force of the cylinder 18 is well designed, when the pull rod node 1b is pressed downward and assembled, even after the downward pressure is released, the piston rod of the cylinder 18 will not generate a force to cause the core shaft support column 19 to rebound upward, thereby avoiding the problem of improper installation due to the rebound movement of the pull rod node 1b. After using the air cylinder 18, the second problem mentioned above is solved: when applying lubricant, the piston rod of the air cylinder 18 can be directly controlled to retract to the right position, driving the mandrel support column 19 to move downward so that the inner circumference of the support cylinder 15 is exposed, without the need for manual pressure, thus reducing the labor intensity of the operator; The third problem mentioned above is addressed by adopting the cylinder 18 : the service life of the cylinder 18 is longer than that of the spring and the supporting force provided by the cylinder 18 is permanent and stable, thereby increasing the service life of the tooling.

[0037] In summary, when disassembling the tie rod joint 1b, through structural design, when the traction tie rod 1 is placed on the first bottom plate 4 or the second bottom plate 14, the above-mentioned support cylinder and support frame can be used to quickly support and position the traction tie rod 1, ensuring the smooth progress of subsequent maintenance work, improving the efficiency of maintenance work, and reducing the difficulty of maintenance work. When disassembling the joint, by setting the conical part 13 on the outer circumferential surface of the pressure head, when the pressure head moves downward, it first contacts the inner hole of the joint installation hole 1a3 to form an automatic centering function of the axis. After centering, the pressure head is used to apply pressure, so as to complete the disassembly of the tie rod joint 1b, avoiding the problem of damage to the product during the disassembly of the tie rod joint 1b. When assembling the tie rod joint 1b, the cylinder 18 is used to replace the spring support mandrel support column 19. After the tie rod joint 1b is pressed down and assembled, even if the downward pressure is released, the piston rod of the cylinder 18 will not generate an upward acting force that causes the mandrel support column 19 to rebound, thus avoiding the problem of misalignment caused by the rebound movement of the tie rod joint 1b; when applying lubricant, the piston rod of the cylinder 18 can be directly controlled to contract in place, driving the mandrel support column 19 to move downward so that the inner circumference of the second support cylinder 15 is exposed, without manual pressure, reducing the labor intensity of the operator; the service life of the cylinder 18 is longer than that of the spring and the provided supporting force is constant and stable, improving the service life of the present invention.

[0038] "Multiple" as described in the embodiments refers to the quantity of "two or more". The above embodiments are only for illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can 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 traction rod maintenance tool for a node intelligent maintenance line, the traction rod comprising a rod body and a rod node, the two ends of the rod body are node mounting ends respectively; the node mounting end comprises a node mounting end 1 and a node mounting end 2, the node mounting end 1 is connected to the center frame, the node mounting end 2 is connected to the frame, the node mounting end 1 and the node mounting end 2 are provided with node mounting holes of the same size, and the rod nodes of the same size can be installed; the central axes of the cylindrical node mounting end 1 and the cylindrical node mounting end 2 are perpendicular to each other, and correspondingly, the central axes of the two node mounting holes are also perpendicular to each other; it is characterized in that: The traction rod maintenance tool comprises a disassembly workpiece, the disassembly workpiece comprises a disassembly tray, a positioning assembly arranged on the disassembly tray, the positioning assembly comprises a bottom plate 1 and a support tube 1 and a support frame 1 arranged on the bottom plate 1, the support tube 1 and the support frame 1 are respectively used to support two node mounting ends of the traction rod; the support tube 1 comprises a cylinder body, and two circular grooves of different sizes are opened in the cylinder body, the larger circular groove is greater than or equal to the outer diameter of the node mounting end, and the inner diameter of the smaller circular groove is greater than or equal to the outer diameter of the rod node core shaft; the support frame 1 comprises a fixed block and a limiting structure installed on the fixed block, the fixed block is vertically installed on the bottom plate 1, the fixed block comprises a support block fixed on the bottom plate 1 and two baffles located on both sides of the support block, and the limiting structure is fixed to the outside of the support block; when supporting, one node mounting end is located on the support tube 1; the other node mounting end is located on the support block and between the baffles on both sides, and the limiting structure is located at the end of the traction rod; the rod node is supported on the two baffles, thereby completing the positioning of the node mounting end 1 and the node mounting end 2.

2. The traction rod maintenance tool according to claim 1, characterized in that: The height of the limiting structure is greater than that of the baffle, and the limiting structure is connected to the support block in an arc transition, so that the support frame is suitable for traction rods of different lengths.

3. The traction rod maintenance tool according to claim 1, characterized in that: When supporting, the point where the node mounting end meets the top surface of a smaller circular groove of the support tube is called contact surface one; the other node mounting end contacts the support frame one, which is called contact surface two; the height of contact surface one is always greater than the height of contact surface two.

4. The traction rod maintenance tool according to claim 1, characterized in that: The support tube 1 is arranged on the top surface of the base plate 1, and a positioning ring and an arc-shaped positioning block are 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, and the arc-shaped positioning block 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.

5. The traction rod maintenance tool according to claim 1, characterized in that: The disassembly workpiece also includes a pressure head, which is an annular pressure head. A cone is arranged on the outer peripheral surface of the annular pressure head, and the central axis of the annular pressure head coincides with the central axis of the support tube 1.

6. The traction rod maintenance tool according to claim 5, characterized in that: The width of the inner hole of the pressure head is matched with the flat width of the core shaft so that the central axis of the inner hole of the pressure head coincides with the central axis of the core shaft; or the inner diameter of the pressure head is matched with the round outer diameter of the core shaft so that the central axis of the inner hole of the pressure head coincides with the central axis of the core shaft.

7. The traction rod maintenance tool according to any one of claims 1 to 6, characterized in that: The traction rod maintenance tool also includes an assembly workpiece, which includes a base plate 2, a support tube 2 and a support frame 2 arranged on the base plate 2, and the support tube 1 and the support frame 1 are respectively used to support the two node mounting ends of the traction rod; a base plate 3 is also arranged at a position below the base plate 2, and the base plate 3 is connected to the bottom surface of the base plate 2 through a connecting rod, and a cylinder is also arranged on the base plate 3, and the cylinder is located below the support tube 2; the assembly workpiece also includes a core shaft support column, which is arranged at an internal position of the support tube 2, and the piston rod of the cylinder is connected to the core shaft support column, and the cylinder can drive the core shaft support column to move back and forth through the support tube 2.

8. The traction rod maintenance tool according to claim 7, characterized in that: A limiting groove matching the shape of the end of the core shaft of the traction rod is arranged on the top surface of the core shaft support column, and the core shaft support column and the limiting groove are both designed to be non-circular.

9. A method for repairing a traction rod according to claim 5, characterized in that: The method includes the following steps of disassembling the tie rod node: during disassembly, when the pressure head moves downward, the cone is first used to contact the inner hole of the traction tie rod node installation end, and the position of the node installation end on which the tie rod node is installed is finely adjusted so that the central axis of the tie rod node coincides with the central axis of the support tube, and then the pressure head is continued to move downward to contact the metal jacket of the traction tie rod to apply pressure, thereby withdrawing the tie rod node from the node installation hole of the node installation end.

10. The traction rod maintenance method according to claim 9, characterized in that: The traction rod maintenance tool also includes an assembly workpiece, which includes a bottom plate 2, a support tube 2 and a support frame 2 arranged on the bottom plate 2, the support tube 1 and the support frame 1 are respectively used to support the two node mounting ends of the traction rod; a bottom plate 3 is also arranged at a position below the bottom plate 2, the bottom plate 3 is connected to the bottom surface of the bottom plate 2 through a connecting rod, and a cylinder is also arranged on the bottom plate 3, and the cylinder is located below the support tube 2; the assembly workpiece also includes a mandrel support column, the mandrel support column is arranged at an internal position of the support tube 2, the piston rod of the cylinder is connected to the mandrel support column, and the mandrel support column can be driven to move back and forth through the support tube 2 by the cylinder; The maintenance method also includes a traction rod assembly step: during assembly, the rod body is placed first, and then the rod node is placed on the core shaft support column, and then downward pressure is applied to the rod node, so that the rod node and the core shaft support column move downward together, and finally the rod node is pressed into the node mounting hole at the rod node mounting end to complete the assembly; during the downward pressure process, the cylinder is always in a ventilated state.

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