Plate spring assembly beam overhauling tool and method for intelligent node overhauling line

Abstract

The invention discloses a plate spring assembly beam maintenance tool and method for a node intelligent maintenance line, the plate spring assembly beam maintenance tool comprises a dismounting workpiece, and 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 bush installation end of the plate spring assembly beam, and the first supporting frame is used for supporting the connecting end of the plate spring assembly beam. Through the structural design, the plate spring assembly beam can be rapidly positioned, and smooth proceeding of follow-up maintenance work is guaranteed. The device further comprises a pressing head, the pressing head comprises an annular pressing head and a positioning pressing head, the central axis of the annular pressing head and the central axis of the positioning pressing head coincide with the central axis of the first supporting cylinder, and the positioning pressing head enables the rubber bushing to be automatically centered. And the annular pressure head can be ensured to be accurately contacted with the metal jacket to withdraw the rubber bushing without damaging the rubber part of the rubber bushing.

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 leaf spring assembly beam of a node intelligent overhaul line, belonging to the technical field of node overhaul. Background Art

[0002] On the same motor car bogie of the CRH3 type high-speed EMU, the front and rear traction motors are fixedly connected to the motor hanging brackets. The motor hanging brackets are suspended on the bogie frame through four leaf spring assembly beams that play an elastic role. The leaf spring assembly beam is composed of a leaf spring and a rubber bushing. The leaf spring can realize the lateral elastic swing and longitudinal vibration damping of the motor hanging bracket and the driving motor. Its rubber bushing is an elastic connecting device between the motor hanging bracket and the leaf spring. The rubber bushing installed in the hanging ring at the end of the leaf spring can realize vertical and longitudinal elasticity. The connecting end of the leaf spring is fixedly connected to the bogie frame through fasteners.

[0003] As Figure 1 shown, a leaf spring assembly beam includes a leaf spring 1 and a rubber bushing 2. One end of the leaf spring 1 is a bushing installation end 3, and the other end is a connecting end 4 connected to the bogie frame. As Figure 2 shown, the bushing installation end 3 has a hanging ring, and a bushing installation hole 31 is opened in the hanging ring. The rubber bushing 2 of the leaf spring assembly beam is installed in the bushing installation hole 31. The leaf spring 1 is elastically connected to the motor hanging bracket through the rubber bushing 2 and is connected to the bogie frame through fasteners. As Figure 3 shown, the rubber bushing 2 of the leaf spring assembly beam sequentially includes a rubber layer 21 and a metal outer sleeve 22 from the inside to the outside, wherein the rubber layer 21 extends out from both ends of the metal outer sleeve 22 (the extending ends of the rubber bushing 2). In actual work, with the increase of working time, the leaf spring assembly beam, especially the rubber bushing 2, ages and wears, resulting in problems of stability, safety and smoothness during vehicle 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 rubber bushing from the leaf spring assembly beam for overhaul to ensure the stability, safety and smoothness during vehicle operation.

[0004] When disassembling the rubber bushing from the hanging ring at the bushing installation end, generally, the leaf spring assembly beam is placed on a tray, and then the rubber bushing is pushed out from the bushing installation end by pressing down with a press head. When placing the leaf spring assembly beam on the tray, it is necessary to ensure the accuracy of the position of the leaf spring assembly beam on the tray to avoid damaging the rubber layer of the rubber bushing. The existing methods for removing nodes have inaccurate positioning, low efficiency, and are prone to accidentally damaging the rubber layer.

[0005] After retrieval, no patent documents identical or similar to the present application have been found yet.

[0006] In summary, how to design a repair tooling and repair method for the leaf spring assembly beam of the node intelligent repair line to ensure the smooth progress of the leaf spring assembly beam repair work, improve the efficiency of the repair work, and reduce the difficulty of the repair work is a technical problem that needs to be solved urgently. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a repair tooling and repair method for the leaf spring assembly beam of the node intelligent repair line in view of the technical problems of low positioning efficiency and inaccurate positioning of the existing repair tooling for the leaf spring assembly beam, which ensures the smooth progress of the leaf spring assembly beam repair work, improves the efficiency of the repair work, and reduces the difficulty of the repair work.

[0008] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A repair tooling for the leaf spring assembly beam of the node intelligent repair line, the leaf spring assembly beam includes a leaf spring and a rubber bushing. One end of the leaf spring is a bushing installation end, and the other end is a connection end connected to the bogie frame; the bushing installation end has a lifting ring, and a bushing installation hole is opened in the lifting ring, and the rubber bushing is installed in the bushing installation hole; the repair tooling for the leaf spring assembly beam includes a disassembly workpiece, the disassembly workpiece includes a disassembly tray and a positioning assembly arranged on the disassembly tray, the positioning assembly includes a bottom plate one and a support cylinder one and a support frame one arranged on the bottom plate one, the support cylinder one is used to support the bushing installation end of the leaf spring assembly beam, and the support frame one is used to support the connection end of the leaf spring assembly beam; the support cylinder one includes a cylinder body, and two circular grooves with different sizes are opened in the cylinder body, the larger circular groove is adapted to the outer diameter of the lifting ring, and the inner diameter of the smaller circular groove is greater than or equal to the outer diameter of the protruding end of the rubber bushing; the support frame one includes a fixed block and a limiting structure installed on the fixed block, the fixed block is vertically installed on the bottom plate one, one end of the fixed block is fixed to the bottom plate one, and an arc-shaped groove adapted to the connection end of the leaf spring is opened at the other end vertically upward; the limiting structure includes a limiting plate parallel to the cross section of the connection end and a transition plate inclined outward relative to the limiting plate; during support, the lifting ring is located in the larger circular groove, the protruding end of the rubber bushing extends into the smaller circular groove, and the transition plate is the placement guide for the connection end of the leaf spring, so that the connection end of the leaf spring can smoothly enter the arc-shaped groove, thereby completing the positioning of the bushing installation end and the connection end.

[0009] Furthermore, the limiting structure is detachably installed on the bottom plate one; the fixed block is T-shaped, the wide end of the T-shaped fixed block is fixed to the bottom plate one, and the groove is opened at the narrow end of the T-shaped fixed block; the limiting plate is fixed to the wide end of the fixed block through a connecting foot; there are two connecting feet, which are respectively located at two parts of the wide part of the T-shaped fixed block; the connecting foot and the limiting plate are of an integrated structure.

[0010] Further, a plurality of connection holes are formed in the connection feet and arranged along the length direction of the leaf spring, and the connection holes on the two connection feet are symmetrically distributed; connection holes are also formed at corresponding positions of the fixed block, but the connection holes on the connection feet are waist-shaped holes.

[0011] Further, the first support cylinder is arranged on the top surface of the first bottom plate, and a positioning ring and an arc-shaped positioning block are arranged on the bottom surface of the first bottom plate; an annular positioning boss one and an annular positioning boss two are arranged on the top surface of the disassembly tray. After 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 annular positioning boss one, and the arc-shaped surface of the arc-shaped positioning block is in contact with the outer peripheral surface of the annular positioning boss two, so as to position the position of the first bottom plate on the disassembly tray.

[0012] Further, the arc-shaped positioning block is detachably connected to the bottom surface of the first bottom plate through a connecting piece.

[0013] Further, the disassembling workpiece further includes a pressing head, the pressing head includes a circular ring-shaped pressing head and a positioning pressing head protruding from the circular ring-shaped pressing head. A first conical part is arranged on the outer peripheral surface of the positioning pressing head, and the central axes of the circular ring-shaped pressing head and the positioning pressing head coincide with the central axis of the first support cylinder.

[0014] Further, the leaf spring assembly beam maintenance tooling further includes an assembling workpiece, the assembling workpiece includes a second bottom plate, a second support cylinder and a second support frame arranged on the second bottom plate. The second support cylinder is used to support the bushing installation end of the leaf spring assembly beam, and the second support frame is used to support the connection end of the leaf spring assembly beam; a third bottom plate is further arranged below the second bottom plate, the third bottom plate is connected to the bottom surface of the second bottom plate through a connecting rod, and a cylinder is further arranged on the third bottom plate. The cylinder is located below the second support cylinder; the assembling workpiece further includes a bushing support column, the bushing support column passes through the second support cylinder and extends out from both ends of the second support cylinder. During pressing, the bushing installation hole of the leaf spring is sleeved on the upward extending end of the bushing support column; the downward extending end of the bushing support column is connected to the piston rod of the cylinder, and the cylinder can drive the bushing support column to move back and forth through the second support cylinder.

[0015] Further, the upward extending end of the bushing support column includes an outer cylinder and an inner cylinder, the inner cylinder protrudes upward from the outer cylinder, and the central axes of the outer cylinder, the inner cylinder and the second support cylinder coincide with each other; the outer diameter of the outer cylinder is adapted to the bushing installation hole on the leaf spring; the outer diameter of the inner cylinder is smaller than the outer diameter of the outer cylinder, but the outer diameter of the inner cylinder is adapted to the inner diameter of the central hole of the rubber bushing, and a second conical part is arranged on the outer circumferential surface of the inner cylinder.

[0016] The present invention also discloses a maintenance method for the leaf spring assembly beam described above, including a rubber bushing disassembly step: During disassembly, when the pressing head moves downward, first use the first conical part to contact the end of the central hole of the rubber bushing to finely adjust the position of the bushing installation end where the rubber bushing is installed, so that the central axis of the rubber bushing 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 rubber bushing to apply pressure, so as to withdraw the rubber bushing from the bushing installation hole of the bushing installation end.

[0017] Furthermore, the maintenance tooling for the leaf spring assembly beam further includes an assembly workpiece. The assembly workpiece includes a second bottom plate, a second support cylinder and a second support frame arranged on the second bottom plate. The second support cylinder is used to support the bushing installation end of the leaf spring assembly beam, and the second support frame is used to support the connection end of the leaf spring assembly beam; A third bottom plate is also arranged below the second bottom plate. The third bottom plate is connected to the bottom surface of the second bottom plate through a connecting rod. An air cylinder is also arranged on the third bottom plate. The air cylinder is located below the second support cylinder. The assembly workpiece further includes a bushing support column. The bushing support column passes through the second support cylinder and extends from both ends of the second support cylinder. During pressing, the bushing installation hole of the leaf spring is sleeved on the upward extending end of the bushing support column; The downward extending end of the bushing support column is connected to the piston rod of the air cylinder, and the air cylinder can drive the bushing support column to move back and forth through the second support cylinder; The maintenance method further includes a leaf spring assembly beam assembly step: During assembly, first place the leaf spring, and then place the rubber bushing on the rubber bushing support column; When the pressing head moves downward, first use the first conical part to contact the end of the central hole of the rubber bushing to make the central axis of the rubber bushing coincide with the central axes of the bushing support column and the second support cylinder, and then continue to move the pressing head downward to contact and apply pressure to the metal outer sleeve of the rubber bushing, so that the rubber bushing and the bushing support column move downward together, and finally press the rubber bushing into the bushing installation hole of the bushing installation end to complete the assembly; During the downward pressing process, the air cylinder is always in a ventilated state.

[0018] The beneficial effects of the present invention are as follows: When disassembling the rubber bushing, through structural design, when the leaf spring is placed on the bottom plate one or the bottom plate two, the above-mentioned support cylinder and support frame can be used to quickly support and position the leaf spring, ensuring the smooth progress of subsequent maintenance work, improving the efficiency of the maintenance work, and reducing the difficulty of the maintenance work. By setting the first conical part on the outer circumferential surface of the positioning press head, when the press head moves downward, it first contacts the central hole of the rubber bushing to form an automatic centering function of the axis line. After centering, the press head is used to apply pressure, thereby completing the disassembly of the rubber bushing and avoiding the problem of damage to the product during the disassembly of the rubber bushing. When assembling the rubber bushing, a cylinder is used to replace the spring to support the bushing support column. After the rubber bushing 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 bushing support column to rebound, thus avoiding the problem of misalignment caused by the rebound movement of the rubber bushing; when applying lubricant, the piston rod of the cylinder can be directly controlled to contract in place, driving the bushing support column to move downward so that the inner circumference of the support cylinder two is exposed, without the need for 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 support force is constant and stable, improving the service life of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the leaf spring assembly beam; Figure 2 is a schematic structural diagram of the leaf spring; Figure 3 is a schematic structural diagram of the rubber bushing; Figure 4 is a schematic structural diagram of the disassembling workpiece (with the leaf spring assembly beam placed); Figure 5 is a schematic structural diagram of the disassembling workpiece (without the leaf spring assembly beam placed); Figure 6 is a partial view of the support frame one; Figure 7 is an exploded view of the disassembling tray and the positioning component; Figure 8 is a schematic structural diagram of the positioning component; Figure 9 is a schematic structural diagram of the support cylinder one; Figure 10 is a sectional view of the disassembling workpiece; Figure 11 is a schematic structural diagram of the assembling workpiece; Figure 12 is a schematic structural diagram of the assembling workpiece (hiding the press head); Figure 13 is a sectional view of the assembling workpiece; Figure 14Schematic diagram of the bushing support column structure.

[0020] In the figure: 1. Leaf spring, 2. Rubber bushing, 21. Rubber layer, 22. Metal outer sleeve, 3. Bushing installation end, 31. Bushing installation hole, 4. Connection end, 5. Disassembly tray, 51. First annular positioning boss, 52. Second annular positioning boss, 6. First bottom plate, 61. Positioning ring, 62. Arc-shaped positioning block, 7. First support cylinder, 71. Larger circular groove, 72. Smaller circular groove, 73. Notch, 8. First support frame, 81. Fixed block, 82. Limiting structure, 83. Arc-shaped groove, 83. Limiting plate, 84. Transition plate, 85. Connection foot, 86. Connection hole, 9. Press head, 91. Circular press head, 92. Positioning press head, 93. First cone part, 10. Second bottom plate, 11. Second support cylinder, 12. Second support frame, 13. Third bottom plate, 14. Bushing support column, 141. Outer cylinder, 142. Inner cylinder, 15. Cylinder, 16. Second cone part. Specific implementation mode

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

[0022] Embodiment: A leaf spring assembly beam maintenance tool for a node intelligent maintenance line, including a disassembled workpiece, such as Figure 4 and Figure 5 shown, the disassembled workpiece includes a disassembly tray 5 and a positioning component arranged on the disassembly tray 5. The positioning component includes a first bottom plate 6 and a first support cylinder 7 and a first support frame 8 arranged on the first bottom plate 6. The first support cylinder 77 is used to support the bushing installation end 3 of the leaf spring assembly beam, and the first support frame 8 is used to support the connection end 4 of the leaf spring assembly beam; the first support cylinder 7 includes a cylinder body, and two circular grooves with different sizes are opened in the cylinder body. The larger circular groove 71 is adapted to the outer diameter of the lifting ring, and the inner diameter of the smaller circular groove 72 is greater than or equal to the outer diameter of the protruding end of the rubber bushing 2; as Figure 6As shown in the figure, the first support frame 8 includes a fixed block 81 and a limiting structure 82 installed on the fixed block 81. The fixed block 81 is vertically installed on the first bottom plate 6. One end of the fixed block 81 is fixed to the first bottom plate 6, and the other end vertically upward is provided with an arc-shaped groove 83 adapted to the connecting end 4 of the leaf spring 1. The limiting structure 82 includes a limiting plate 83 parallel to the cross-section of the connecting end 4 and a transition plate 84 inclined outward relative to the limiting plate 83. During support, the hanging ring is located in the larger circular groove 71, and the protruding end of the rubber bushing 2 extends into the smaller circular groove 72. The transition plate 84 guides the placement of the connecting end 4 of the leaf spring 1, enabling the connecting end 4 of the leaf spring 1 to smoothly enter the arc-shaped groove 83, thereby completing the positioning of the mounting end 3 and the connecting end 4 of the bushing. In this embodiment, when disassembling the rubber bushing 2, through the above structural design, when the leaf spring assembly beam is placed on the positioning component, the above-mentioned first support cylinder 7 and the first support frame 8 can be used to accurately position the position of the leaf spring assembly beam placed on the positioning component, ensuring the smooth progress of subsequent maintenance work, improving the efficiency of the maintenance work, and reducing the difficulty of the maintenance work.

[0023] As Figure 7 shown, the first support cylinder 7 is detachably connected to the first bottom plate 6. By setting it as a detachable structure, various different specifications of the first support cylinder 7 can be replaced, so as to be applicable to the positioning of the mounting ends 3 of leaf spring assembly beams of various specifications, improving the versatility. As Figure 9 shown, a notch 73 is also provided on the first support cylinder 7. Leaving a notch 73 here is to facilitate the mechanical gripper to pick up the leaf spring 1 from the first bottom plate 6 or grab and place the leaf spring assembly beam on the first bottom plate 6.

[0024] As Figure 6 shown, the limiting structure 82 is detachably installed on the first bottom plate 6; the fixed block 81 is T-shaped, the wide end of the T-shaped fixed block 81 is fixed to the first bottom plate 6, and the groove is opened at the narrow end of the T-shaped fixed block 81; the limiting plate 83 is fixed to the wide end of the fixed block 81 through a connecting leg 85; As Figure 6As shown, there are two connecting feet 85, which are respectively located in two parts of the width of the T-shaped fixing block 81; the connecting feet 85 and the limiting plate 83 are of an integral structure. A plurality of connecting holes 86 arranged along the length direction of the leaf spring 1 are formed in the connecting feet 85, and the connecting holes 86 on the two connecting feet 85 are symmetrically distributed; connecting holes are also formed at the corresponding positions of the fixing block 81, but the connecting holes 86 on the connecting feet 85 are waist-shaped holes. The limiting structure 82 is detachably mounted on the bottom plate 6, and rows of connecting holes 86 are arranged on the connecting feet 85. According to leaf springs 1 of different sizes, the position of the limiting structure 82 can be adjusted. The detachable installation of the limiting structure 82 can roughly adjust the position of the limiting structure 82, and then the waist-shaped holes 86 of the connecting feet 85 can be used to finely adjust the position of the limiting structure 82.

[0025] As Figure 7 , 8 shown, the first support cylinder 7 is arranged on the top surface of the first bottom plate 6, and a positioning ring 61 and an arc-shaped positioning block 62 are arranged on the bottom surface of the first bottom plate 6; a first annular positioning boss 51 and a second annular positioning boss 52 are arranged on the top surface of the disassembly tray 5. When the first bottom plate 6 is placed on the disassembly tray 5, the inner peripheral surface of the positioning ring 61 is in contact with the outer peripheral surface of the first annular positioning boss 51 and the arc-shaped surface of the arc-shaped positioning block 62 is in contact with the outer peripheral surface of the second annular positioning boss 52, so as to position the position of the first bottom plate 6 on the disassembly tray 5.

[0026] In the node intelligent maintenance line, in order to adapt to node disassembly work of various specifications, when replacing nodes of different specifications (the nodes in this application are rubber bushings 2) for disassembly, the first bottom plate 6 and the disassembly tray 5 need to be disassembled and assembled. When the first bottom plate 6 is reinstalled on the disassembly tray 5, the above positioning structure can quickly and accurately position the bottom plate on the disassembly tray 5, further improving the efficiency of the maintenance work and reducing the difficulty of the maintenance work. The arc-shaped positioning block 62 can be detachably connected to the bottom surface of the first bottom plate 6 through a connecting piece such as a screw, so that the position of the arc-shaped positioning block 62 on the bottom surface of the first bottom plate 6 can be flexibly adjusted. Thus, after the position of the positioning ring 61 is determined, the position of the arc-shaped positioning block 62 on the bottom surface of the first bottom plate 6 can be finely adjusted according to the actual working conditions, so that the arc-shaped surface of the arc-shaped positioning block 62 is more accurately attached to the outer peripheral surface of the second annular positioning boss 52 to form a positioning structure, further improving the positioning accuracy of the first bottom plate 6 on the disassembly tray 5.

[0027] As Figure 10 , Figure 12As shown, the workpiece to be disassembled further includes a pressure head 9. The pressure head 9 includes an annular pressure head 91 and a positioning pressure head 92 protruding from the annular pressure head 91. A first tapered portion 93 is provided on the outer peripheral surface of the positioning pressure head 92. The central axes of the annular pressure head 91 and the positioning pressure head 92 coincide with the central axis of the first support cylinder 7. After the first support cylinder 7 supports the bushing installation end 3 of the leaf spring assembly beam, the bottom of the bushing installation end 3 is placed on the first support cylinder 7. Due to operational reasons, the central axis of the rubber bushing 2 installed in the bushing installation end 3 does not necessarily coincide with the central axis of the first support cylinder 7. Since the rubber bushing 2 includes a metal outer sleeve 22 and a rubber layer 21 vulcanized and bonded to the metal outer sleeve 22, at this time, if the pressure head 9 is controlled to press down, the bottom of the positioning pressure head 92 is likely to press on the rubber layer 21, causing damage to the product. Therefore, in this embodiment, the first tapered portion 93 is provided on the outer peripheral surface of the positioning pressure head 92. When the pressure head 9 moves downward, the first tapered portion 93 is first brought into contact with the central hole of the rubber bushing 2 to finely adjust the position of the bushing installation end 3 where the rubber bushing 2 is installed, so that the central axis of the rubber bushing 2 coincides with the central axis of the first support cylinder 7. Then, by continuing to move the pressure head 9 downward to contact the metal outer sleeve 22 of the rubber bushing 2 for pressing, the rubber bushing 2 is withdrawn from the bushing installation hole 31 of the bushing installation end 3. By providing the tapered portion on the outer circumferential surface of the positioning pressure head 92 in this embodiment, when the pressure head 9 moves downward, it first contacts the central hole of the rubber bushing 2 to form an automatic centering function of the axis. After centering, the pressure head 9 is used to apply pressure, thereby completing the disassembly of the rubber bushing 2 and avoiding the problem of damage to the product during the disassembly of the rubber bushing 2.

[0028] As Figure 10 , Figure 11 and Figure 12 shown, the maintenance tooling for the leaf spring assembly beam further includes an assembly workpiece. The assembly workpiece includes a second base plate 10, a second support cylinder 11 provided on the second base plate 10, and a second support frame 12. The second support cylinder 11 is used to support the bushing installation end 3 of the leaf spring assembly beam, and the second support frame 12 is used to support the connection end 4 of the leaf spring assembly beam; A third base plate 13 is further provided at a position below the second base plate 10. The third base plate 13 is connected to the bottom surface of the second base plate 10 through a connecting rod. An air cylinder is further provided on the third base plate 13. The air cylinder is located below the second support cylinder 11; As Figure 13As shown, the assembled workpiece further includes a bushing support column 14. The bushing support column 14 passes through the second support cylinder 11 and extends out from both ends of the second support cylinder 11. During press-fitting, the bushing mounting hole 31 of the leaf spring 1 is sleeved on the upward-extending end of the bushing support column 14; the downward-extending end of the bushing support column 14 is connected to the piston rod of the cylinder 15, and the cylinder can drive the bushing support column 14 to move back and forth through the second support cylinder 11. The second support cylinder 11 has the same structure as the first support cylinder 7, and the second support frame 12 has the same structure as the first support frame 8.

[0029] As Figure 14 shown, the upward-extending end of the bushing support column 14 includes an outer cylinder 141 and an inner cylinder 142. The inner cylinder 142 protrudes upward from the outer cylinder 141, and the central axes of the outer cylinder 141, the inner cylinder 142, and the second support cylinder 11 coincide with each other; the outer diameter of the outer cylinder 141 is adapted to the bushing mounting hole 31 on the leaf spring 1; the outer diameter of the inner cylinder 142 is smaller than the outer diameter of the outer cylinder 141, but the outer diameter of the inner cylinder 142 is adapted to the inner diameter of the central hole of the rubber bushing 2, and a second taper portion 16 is provided on the outer circumferential surface of the inner cylinder 142. During press-fitting, first place the leaf spring 1 on the second support cylinder 11 and the second support frame 12, then place the rubber bushing 2 on the bushing support column 14. The second taper portion 16 guides the rubber bushing 2 to smoothly sleeve on the bushing support column 14. The press head 9 descends. The first taper portion 93 of the positioning press head 92 of the press head 9 first contacts the central hole of the rubber bushing 2, so that the central axes of the press head 9, the rubber bushing 2, the second support cylinder 11, and the bushing support column 14 coincide with each other. Then, by further lowering the press head 9, the annular press head 91 presses against the metal outer sleeve 22 of the rubber bushing 2 to press the rubber bushing 2 into the bushing mounting hole 31 of the leaf spring 1 to complete the assembly; during the downward pressing process, the cylinder 15 is always in the ventilated state. It should be noted that the same press head 9 is used for the retraction node and the press-fitting node in this application.

[0030] It should be particularly noted that in the prior art, some use a spring to support the bushing support column 14, but the applicant has found that using a spring will cause the following problems: First, during the downward movement of the bushing support column 14, the spring will be gradually compressed. As the compression degree gradually increases, the resilience of the spring also gradually increases. When the rubber bushing 2 is press-fitted and the downward pressure is released, at this time, due to the very large resilience of the spring, the bushing support column 14 will be pushed upward by the resilience of the spring, so that the bushing support column 14 and the rubber bushing 2 will move upward together by a certain position, resulting in the problem of improper installation caused by the rebound movement of the rubber bushing 2. Second, before assembly, lubricant is usually applied inside the support tube 11 to avoid scratching the support tube 11 during press-fitting. When applying lubricant, the bushing support column 14 needs to be moved down to expose the inner circumference of the support tube 11 for easy application. However, if the bushing support column 14 is connected to a spring, it is necessary to press hard to compress the spring before the bushing support column 14 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.

[0031] In view of the above technical problems, the applicant changed to a cylinder to replace the spring. After adopting the cylinder, the first problem mentioned above is solved: when the present embodiment is pressed down, the cylinder is always in a ventilated state. Due to the characteristics of the cylinder itself, no matter how much the stroke of the piston rod is, the magnitude of the force provided by the cylinder remains unchanged, that is, in the process of the bushing support column 14 moving downward, the supporting force provided by the cylinder to the bushing support column 14 is constant. Therefore, as long as the force of the cylinder is well designed, when the rubber bushing 2 is pressed down and assembled, even if the downward pressure is released, the piston rod of the cylinder will not generate a force to cause the bushing support column 14 to rebound upward, thereby avoiding the problem of improper installation due to the rebound movement of the rubber bushing 2. The second problem mentioned above is solved by using the air cylinder: when applying lubricant, the piston rod of the air cylinder can be directly controlled to retract to the right position, driving the bushing support column 14 to move downward so that the inner circumference of the support cylinder 11 is exposed, without the need for manual pressure, thus reducing the labor intensity of the operator; The use of the cylinder addresses the third problem mentioned above: the service life of the cylinder is longer than that of the spring and the supporting force it provides is permanent and stable, thus increasing the service life of the tooling.

[0032] In summary, when disassembling the rubber bushing 2, through structural design, when the leaf spring 1 is placed on the bottom plate one 6 or the bottom plate two 1010, the above-mentioned support cylinder and support frame can be used to quickly support and position the leaf spring 1, ensuring the smooth progress of subsequent maintenance work, improving the efficiency of maintenance work, and reducing the difficulty of maintenance work. By setting the first conical part 93 on the outer circumferential surface of the positioning press head 92, when the press head 9 moves downward, it first contacts the central hole of the rubber bushing 2 to form an automatic centering function of the axis line. After centering, the press head 9 is used to apply pressure, so as to complete the disassembly of the rubber bushing 2, avoiding the problem of damage to the product during the disassembly of the rubber bushing 2. When assembling the rubber bushing 2, a cylinder is used to replace the spring support bushing support column 14. After the rubber bushing 2 is pressed down and assembled, even if the downward pressure is released, the piston rod of the cylinder will not generate an upward acting force that causes the bushing support column 14 to rebound, thus avoiding the problem of improper installation caused by the rebound movement of the rubber bushing 2; when applying lubricant, the piston rod of the cylinder can be directly controlled to contract in place, driving the bushing support column 14 to move downward so that the inner circumference of the support cylinder two 11 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.

[0033] "Multiple" as described in the embodiments refers to a 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 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 leaf spring assembly beam maintenance tool for a node intelligent maintenance line, the leaf spring assembly beam comprising a leaf spring and a rubber bushing, one end of the leaf spring being a bushing mounting end, and the other end being a connecting end connected to a bogie frame; the bushing mounting end having a lifting ring, a bushing mounting hole being opened in the lifting ring, the rubber bushing being installed in the bushing mounting hole; characterized in that: The leaf spring assembly beam maintenance tooling includes a disassembly workpiece, the disassembly workpiece includes a disassembly tray, a positioning assembly arranged on the disassembly tray, the positioning assembly includes a base plate and a support tube and a support frame arranged on the base plate, the support tube is used to support the bushing installation end of the leaf spring assembly beam, and the support frame is used to support the connecting end of the leaf spring assembly beam; the support tube includes a cylinder body, and two circular grooves of different sizes are opened in the cylinder body, the larger circular groove is adapted to the outer diameter of the lifting ring, and the inner diameter of the smaller circular groove is greater than or equal to the outer diameter of the protruding end of the rubber bushing; the support frame includes a cylinder body, and the inner diameter of the larger circular groove is greater than or equal to the outer diameter of the protruding end of the rubber bushing; the support frame includes a cylinder body, and the inner diameter of the smaller circular groove is greater than or equal to the outer diameter of the protruding end of the rubber bushing. The invention comprises a fixing block and a limiting structure installed on the fixing block, wherein the fixing block is vertically installed on the base plate one, one end of the fixing block is fixed to the base plate one, and the other end vertically upward is provided with an arc-shaped groove adapted to the connecting end of the leaf spring; the limiting structure comprises a limiting plate parallel to the cross section of the connecting end and a transition plate inclined outwardly relative to the limiting plate; when supporting, the lifting ring is located in the larger circular groove, the protruding end of the rubber bushing extends into the smaller circular groove, and the transition plate is a placement guide for the connecting end of the leaf spring, so that the connecting end of the leaf spring can smoothly enter the arc-shaped groove, thereby completing the positioning of the bushing mounting end and the connecting end.

2. The leaf spring assembly beam maintenance tool according to claim 1, characterized in that: The limiting structure can be detachably installed on the base plate; the fixing block is T-shaped, the wider end of the T-shaped fixing block is fixed to the base plate, and the groove is opened at the narrow end of the T-shaped fixing block; the limiting plate is fixed to the wider end of the fixing block through a connecting foot; there are two connecting feet, which are respectively located at the two wide parts of the T-shaped fixing block; the connecting foot and the limiting plate are an integrated structure.

3. The leaf spring assembly beam maintenance tool according to claim 2, characterized in that: The connecting foot is provided with a plurality of connecting holes arranged along the length direction of the leaf spring, and the connecting holes on the two connecting feet are symmetrically distributed; connecting holes are also provided at positions corresponding to the fixing block, but the connecting holes on the connecting feet are waist-shaped holes.

4. The leaf spring assembly beam 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 leaf spring assembly beam maintenance tool according to claim 4, characterized in that: The arc-shaped positioning block is detachably connected to the bottom surface of the base plate 1 through a connecting piece.

6. The leaf spring assembly beam maintenance tool according to claim 1, characterized in that: The disassembly workpiece also includes a pressure head, which includes an annular pressure head and a positioning pressure head protruding from the annular pressure head. A cone portion 1 is provided on the outer peripheral surface of the positioning pressure head. The central axes of the annular pressure head and the positioning pressure head coincide with the central axis of the support tube 1.

7. The leaf spring assembly beam maintenance tool according to any one of claims 1 to 6, characterized in that: The leaf spring assembly beam 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, the support tube 2 is used to support the bushing mounting end of the leaf spring assembly beam, and the support frame 2 is used to support the connecting end of the leaf spring assembly beam; a base plate 3 is also arranged below the base plate 2, 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 bushing support column, the bushing support column passes through the support tube 2 and extends from both ends of the support tube 2, and when pressed, the bushing mounting hole of the leaf spring is sleeved on the end of the bushing support column extending upward; the end of the bushing support column extending downward is connected to the piston rod of the cylinder, and the cylinder can drive the bushing support column to move back and forth through the support tube 2.

8. The leaf spring assembly beam maintenance tool according to claim 7, characterized in that: The upwardly extending end of the bushing support column includes an outer cylinder and an inner cylinder, the inner cylinder protrudes upward from the outer cylinder, and the central axes of the outer cylinder, the inner cylinder and the support tube 2 coincide with each other; the outer diameter of the outer cylinder is matched with the bushing mounting hole on the leaf spring; the outer diameter of the inner cylinder is smaller than the outer diameter of the outer cylinder, but the outer diameter of the inner cylinder is matched with the inner diameter of the center hole of the rubber bushing, and a cone 2 is provided on the outer circumferential surface of the inner cylinder.

9. A method for repairing a leaf spring assembly beam according to claim 6, characterized in that: The method comprises the steps of disassembling the rubber bushing: during disassembly, when the pressure head moves downward, the cone portion 1 is first used to contact the end of the center hole of the rubber bushing, and the position of the bushing mounting end on which the rubber bushing is installed is finely adjusted so that the center axis of the rubber bushing coincides with the center axis of the support tube 1, and then the pressure head is further moved downward to contact the metal outer sleeve of the rubber bushing to apply pressure, thereby withdrawing the rubber bushing from the bushing mounting hole of the bushing mounting end.

10. The method for repairing a leaf spring assembly beam according to claim 9, characterized in that: The leaf spring assembly beam 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, the support tube 2 is used to support the bushing installation end of the leaf spring assembly beam, and the support frame 2 is used to support the connecting end of the leaf spring assembly beam; a base plate 3 is also arranged at a position below the base plate 2, 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 at a position below the support tube 2. The assembly workpiece also includes a bushing support column, the bushing support column passes through the support tube 2 and extends from both ends of the support tube 2, and when press-fitting, the bushing installation hole of the leaf spring is sleeved on the end of the bushing support column that extends upward; the end of the bushing support column that extends downward is connected to the piston rod of the cylinder, and the bushing support column can be driven to move back and forth through the support tube 2 through the cylinder; The inspection method also includes the step of assembling the leaf spring assembly beam: during assembly, the leaf spring is placed first, and then the rubber bushing is placed on the rubber bushing support column; when the pressure head moves downward, the connection between the cone part 1 and the end of the center hole of the rubber bushing is first used to make the center axis of the rubber bushing coincide with the center axis of the bushing support column and the support tube 2, and then the pressure head continues to move downward to apply pressure to the connection with the metal jacket of the rubber bushing, so that the rubber bushing and the bushing support column move downward together, and finally the rubber bushing is pressed into the bushing mounting hole at the bushing mounting end to complete the assembly; during the downward pressing process, the cylinder is always in a ventilated state.

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