Dismounting tool for shaft pin of longitudinal beam traction pull rod of maglev train

Abstract

The invention provides a dismounting tool for a shaft pin of a longitudinal beam traction rod of a maglev train, and the dismounting tool comprises a main body beam which is of a long-strip-shaped rigid structure; the supporting sliding assemblies are arranged on the lower surface of the main body beam at intervals, and each supporting sliding assembly is provided with a smooth contact face used for being attached to the surface of the longitudinal beam frame; the force transmission arm protrudes downwards from the lower surface of the main body beam and is located between the two supporting sliding assemblies, and the force transmission arm is constructed to extend into the V-shaped groove of the longitudinal beam frame; the impact head is arranged at the tail end of the force transmission arm, and the extension direction is perpendicular to the length direction of the main body beam; the stress part is convexly arranged on the upper surface of the main body beam; wherein the stress part is rigidly connected with the force transmission arm through the main body beam, and the tool is constructed to integrally slide on the longitudinal beam frame in the horizontal direction by means of the supporting and sliding assembly when the stress part is hit horizontally.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail transit equipment maintenance, and in particular, relates to a dismounting tool for a traction rod shaft pin of a longitudinal beam of a maglev train. BACKGROUND

[0002] With the rapid development of high-speed maglev train technology, the operation safety and maintenance efficiency of the train are increasingly valued. The suspension frame system of the maglev train is a key component connecting the train body and the track, and the traction rod assembly plays a core role in transmitting traction force and braking force. For example, Chinese Patent Application Publication No. CN112477613A discloses a maglev train traction device, which describes in detail the composition of the traction device, including a train body traction seat connected to the train body, a buffer assembly arranged in the internal accommodating cavity of the traction seat, a traction center pin, and a traction rod assembly extending in the longitudinal direction and connected between the traction center pin and the linear motor. In the prior art, the traction rod assembly is hingedly fixed in the structure of the longitudinal beam frame through a pin shaft (shaft pin) to adapt to the vertical and lateral movement during train operation.

[0003] However, although the prior art optimizes the connection structure of the traction device, there are still significant technical problems in the full life cycle maintenance of the train, especially in the dismounting and replacement of the traction rod assembly. The longitudinal beam frame of the maglev train is usually made of aluminum alloy material, and in order to meet the dual requirements of light weight and structural strength, the area where the traction rod is installed is often designed as a "V"-shaped groove structure with a complex cross section or a restricted space with reinforcing ribs. In the long-term operation of the train, the shaft pin of the traction rod is subjected to high-frequency vibration and large shear load for a long time, which is prone to fretting wear or corrosion, resulting in a tight "stuck" state (excessive interference fit) between the shaft pin and the pin hole. When the train is overhauled for ten years or needs to be replaced due to rod damage, dismounting these stuck shaft pins becomes a very challenging task.

[0004] The prior art lacks a special tool for disassembling the shaft pin in such a limited space. The conventional disassembly method usually relies on a maintenance personnel to hold a general metal or copper rod and hit it with a large pound hammer. However, this primitive operation method has serious structural defects: first, due to the extremely narrow internal space of the V-shaped groove of the longitudinal beam frame, the operation distance along the shaft pin axis direction is often insufficient, and the maintenance personnel cannot obtain enough hammer space to exert effective impact force, resulting in extremely low disassembly efficiency; second, due to the lack of a guide device, the general rod is prone to slip during the knocking process, and once the rod slips, the high-hardness metal tool will directly hit or scratch the expensive aluminum alloy longitudinal beam surface, causing irreversible stress concentration points or structural damage, which seriously threatens the structural safety of the train; third, for the shaft pin located below the longitudinal beam frame, the maintenance personnel need to lie on the bottom of the train for overhead operation, which is not only limited by the narrow space on the ground, but also needs to overcome the gravity to hit the hammer upward, almost impossible to exert enough disassembly force, and extremely easy to cause personal injury due to tool falling.

[0005] In summary, although the traction rod mounting structure in the prior art meets the operation requirements, the closed, narrow and complex maintenance environment formed thereby makes the traditional disassembly method insufficient. How to safely, efficiently and non-destructively disassemble the "stuck" shaft pin in an environment where direct force cannot be applied, the space is limited and the surface protection requirement is extremely high is a technical problem to be solved in the current maglev train maintenance field, and is also the core problem to be solved by the present application. SUMMARY

[0006] The purpose of the present application is to provide a disassembly tool for the traction rod shaft pin of the longitudinal beam of a maglev train, to solve the technical problems in the prior art that the internal space of the longitudinal beam frame is narrow, making it difficult to apply force effectively, and the traditional disassembly method lacks a guide and is prone to damage the surface of the longitudinal beam and difficult to perform overhead disassembly operation.

[0007] To achieve the above-mentioned purpose, the present application provides a disassembly tool for the traction rod shaft pin of the longitudinal beam of a maglev train, comprising: a main beam in a long strip-shaped rigid structure; a support sliding component arranged at intervals on the lower surface of the main beam, the support sliding component having a smooth contact surface for fitting the surface of the longitudinal beam frame; a force transmission arm protruding downward from the lower surface of the main beam and located between the two support sliding components, the force transmission arm being configured to extend into the V-shaped groove of the longitudinal beam frame; a striking head arranged at the end of the force transmission arm, the extension direction of the striking head being perpendicular to the length direction of the main beam; a force receiving part protruding from the upper surface of the main beam; wherein the force receiving part and the force transmission arm are rigidly connected through the main beam, and the tool is configured to slide integrally along the horizontal direction on the longitudinal beam frame when the force receiving part is hit horizontally.

[0008] By the above structure, the force point originally located in the deep part of the narrow V-shaped groove is transferred to the external force receiving part by the rigid cantilever structure through the principle of "spatial misplacement". The operator does not need to put the tool into the limited space, but only needs to apply a horizontal impact to the force receiving part outside, and the impact force can be transmitted to the impact head inside without damage through the main beam and the force transmission arm. At the same time, the support sliding assembly uses the surface of the longitudinal beam frame as a "guide rail" to limit the tool to a predetermined motion track, ensuring that the direction of the impact force is always along the axis direction of the pin shaft, avoiding damage to the longitudinal beam due to tool slipping.

[0009] Preferably, the vertical projection position of the force receiving part on the main beam is mislocated along the length direction of the main beam from the vertical projection position of the force transmission arm on the main beam, and the two positions have a preset distance; the tool is configured such that when the support sliding assembly is attached to the top surface of the longitudinal beam frame, the force receiving part is located above the space of the longitudinal beam frame, the force transmission arm extends into the V-shaped groove, and the force receiving part is located away from the force transmission arm.

[0010] Through the above arrangement, the unobstructed operation view is realized. Since the force receiving part and the force transmission arm are mislocated, when the operator strikes the force receiving part above, the line of sight can avoid the obstruction of the hammer head and the force receiving part, and directly observe the displacement of the force transmission arm and the pin shaft below, thereby accurately controlling the striking force. In addition, the force arm generated by mislocation will generate an auxiliary rotating torque when subjected to a horizontal impact, which will help the tool to press more closely to the surface of the longitudinal beam during sliding, preventing the tool from jumping.

[0011] Preferably, the force transmission arm includes a columnar body connected to the lower surface of the main beam, and the cross section of the columnar body is circular or annular; the bottom surface of the columnar body is provided with a guide slope, and the included angle of the guide slope with respect to the horizontal plane is an acute angle; the guide slope is configured to avoid the bottom of the V-shaped groove when the tool slides in the horizontal direction.

[0012] Through the above arrangement, the tool is given the ability of "dynamic obstacle crossing" and "rotational tolerance". The guide slope constitutes a "sled" structure, which can guide the tool to slightly lift over the obstacle when there is a weld or unevenness at the bottom of the V-shaped groove, avoiding rigid jamming; and the cylindrical cross section design ensures that even if the tool slightly deviates due to uneven impact force, the circular arc surface will not be stuck or scratched like the square edges, greatly improving the adaptability of the tool to harsh working conditions.

[0013] Preferably, the impact head is a metal cylinder, the side wall of the force transmission arm is provided with a mounting hole, and the impact head is detachably fixed in the mounting hole; the axis of the impact head is parallel to the lower surface of the main beam, and the impact head is configured such that when the tool is installed on the longitudinal beam frame, the axis of the impact head is collinear with the axis of the traction rod shaft pin to be disassembled, so as to convert the horizontal sliding force into the axial thrust force of the traction rod shaft pin.

[0014] Through the above setting, the replaceability of the impact head is realized to adapt to different diameters of the pin shaft or to be replaced after wear; and the axis collinear design ensures that the force transmission efficiency is maximized, avoiding harmful shear component.

[0015] Preferably, the main beam is a hollow square tube structure made of metal material, and the length of the main beam is greater than the width of the longitudinal beam frame; the force receiving part and the force transmitting arm are respectively welded and fixed on the opposite two side walls of the hollow square tube structure.

[0016] Through the above setting, the dynamic characteristics of the tooling are optimized. The hollow structure significantly reduces the inertial mass of the tooling while ensuring bending stiffness. According to Newton's second law, under the same impact force, a tooling with low inertia can obtain greater instantaneous acceleration, thereby transferring more impact energy to the pin shaft rather than consuming it to overcome the inertia of the tooling itself. In addition, the hollow structure also helps to absorb high-frequency impact vibrations and protect the welded structure.

[0017] Preferably, the support sliding assembly includes two nylon pads, which are respectively fixed on the two ends of the lower surface of the main beam through countersunk screws; the distance between the two nylon pads is adapted to the distance between the two guide rail surfaces of the longitudinal beam frame, forming a soft contact sliding friction pair between the main beam and the longitudinal beam frame.

[0018] Through the above setting, the nylon pads provide a low-friction sliding interface, making the tooling slide more smoothly; more importantly, the soft nylon material completely isolates the direct contact between the metal main beam and the aluminum alloy longitudinal beam, eliminating the risk of scratching the surface of the longitudinal beam during disassembly.

[0019] Preferably, it further includes a hanging plate and at least two connecting rods, the hanging plate is provided with through holes corresponding to the connecting rods; the tooling is configured to have a lower shaft pin disassembly state: the main beam is inverted below the longitudinal beam frame, the force transmitting arm extends upward into the V-shaped groove and abuts against the lower traction rod shaft pin; the hanging plate is erected above the longitudinal beam frame, the connecting rods vertically pass through the gap of the longitudinal beam frame and connect the hanging plate and the main beam, and the longitudinal beam frame is clamped between the hanging plate and the main beam by locking the connecting rods. Further, the connecting rods are long screws, the main beam is provided with threaded holes or through holes matched with the long screws, and the hanging plate and the main beam are locked by nuts to form a rigid closed loop structure surrounding the longitudinal beam frame.

[0020] The above design creatively solves the problem of disassembling the bottom pin. Utilizing a closed-loop clamping structure, the tooling is securely "suspended" below the longitudinal beam, overcoming the effects of gravity. At this point, the operator only needs to apply a horizontal impact to the inverted, stressed part while looking upwards from the ground; the entire closed-loop structure will then slide horizontally along the longitudinal beam, thus pushing out the bottom pin. This design transforms the difficult upward-looking operation into a controllable horizontal sliding operation, greatly improving safety and efficiency.

[0021] In summary, this invention, through its unique staggered force transmission structure and sliding guide design, transforms disassembly operations within a confined space into operations in an open external space, and creatively utilizes the longitudinal beam itself as a guide rail. Combined with a dynamically optimized hollow structure and a closed-loop clamping design adapted to the bottom, it achieves safe, efficient, and non-destructive disassembly of the traction rod axle pin of a maglev train. Attached Figure Description

[0022] Figure 1 This is a side view of the disassembly tooling for the traction rod pin of the longitudinal beam of a maglev train according to an embodiment of the present invention.

[0023] Figure 2 This is a top view of a disassembly fixture of one embodiment of the present invention installed on a longitudinal beam frame (upper shaft pin disassembled).

[0024] Figure 3 For along Figure 2 A schematic diagram of the cross-sectional structure of line AA in the middle.

[0025] Figure 4 This is a cross-sectional structural diagram of a disassembly fixture installed below the longitudinal beam frame (with the lower axle pin disassembled) according to an embodiment of the present invention. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0027] Figure 1 This is a side view of the disassembly tooling for the traction rod pin of the longitudinal beam of a maglev train according to an embodiment of the present invention.

[0028] Figure 2 This is a top view of a disassembly fixture of one embodiment of the present invention installed on a longitudinal beam frame (upper shaft pin disassembled).

[0029] Figure 3 For along Figure 2 A schematic diagram of the cross-sectional structure of line AA in the middle.

[0030] Figure 4Figure 1 is a schematic diagram of a cross-sectional structure of a dismounting tool of an embodiment of the present application installed below a longitudinal beam frame (in a lower shaft pin dismounting state).

[0031] As shown in Figures 1 to 3 , the present application provides a dismounting tool for a shaft pin of a traction rod of a magnetic levitation train longitudinal beam, comprising a main beam 1 in a long strip rigid structure. The lower surface of the main beam 1 is provided with support sliding components 3 at intervals, which have smooth contact surfaces for fitting the surface of the longitudinal beam frame 6. A force transmission arm 2 protrudes downward from the lower surface of the main beam 1 and is located between the two support sliding components 3. As shown in Figure 3 , the force transmission arm 2 is configured to extend into the V-shaped groove 61 of the longitudinal beam frame 6. A striking head 4 is provided at the end of the force transmission arm 2, and its extension direction is perpendicular to the length direction of the main beam 1. A force receiving part 5 is protruded on the upper surface of the main beam 1. The force receiving part 5 and the force transmission arm 2 are rigidly connected through the main beam 1.

[0032] Through the above structure, the tool is configured to slide as a whole along the horizontal direction on the longitudinal beam frame 6 when the force receiving part 5 is subjected to a horizontal impact force (as shown by arrow F in Figure 3 ). This design utilizes the "spatial dislocation" principle to transfer the force point originally located in the deep part of the narrow V-shaped groove 61 to the external open force receiving part 5, and utilizes the longitudinal beam frame 6 itself as a guide rail to achieve indirect and non-destructive dismounting of the internal traction rod shaft pin 71.

[0033] Further, as shown in Figure 1 , the vertical projection position of the force receiving part 5 on the main beam 1 is dislocated from the vertical projection position of the force transmission arm 2 on the main beam 1 along the length direction of the main beam 1, and there is a predetermined distance L between them.

[0034] Through the above dislocation setting, when the support sliding components 3 fit the top surface of the longitudinal beam frame 6, the force receiving part 5 is located in the space above the longitudinal beam frame 6, and the force transmission arm 2 extends into the inside of the V-shaped groove 61. This dislocation design allows the operator's line of sight not to be blocked when striking the force receiving part 5, and the displacement of the force transmission arm 2 and the shaft pin 71 below can be clearly observed, realizing visual operation. At the same time, the force arm L generated by the dislocation will produce an auxiliary rotating torque when subjected to a horizontal impact, which will help the tool to press more closely to the surface of the longitudinal beam frame 6 at the moment of sliding, preventing the tool from jumping.

[0035] Further, as shown in Figure 1 and Figure 3 , the force transmission arm 2 comprises a columnar body connected to the lower surface of the main beam 1, and the cross section of the columnar body is preferably circular or circular ring-shaped. The bottom surface of the columnar body is provided with a guide inclined surface, and the included angle of the guide inclined surface with respect to the horizontal plane is an acute angle (for example, 20°).

[0036] Through the above-mentioned guiding slope design, the tool can avoid the weld or uneven structure at the bottom of the V-shaped groove 61 when sliding in the horizontal direction, forming a "sled" effect and avoiding rigid jamming. At the same time, the cylindrical cross-section design gives the tool a certain rotation tolerance, so that even if the impact force is uneven, the circular arc surface will not be as rigid as the square edges, which will not cause the tool to be stuck or scratched the inner wall of the V-shaped groove 61.

[0037] Further, as shown in Figure 3 The impact head 4 is a metal cylinder, and the side wall of the force transmission arm 2 is provided with a mounting hole. The impact head 4 is detachably fixed (for example, by threaded connection) in the mounting hole. The axis of the impact head 4 is parallel to the lower surface of the main beam 1, and is configured to be collinear with the axis of the traction rod shaft pin 71 to be disassembled when the tool is installed on the longitudinal beam frame 6.

[0038] Through the above-mentioned structure, the impact head 4 can directly convert the horizontal sliding force into axial thrust on the traction rod shaft pin 71, and the detachable design allows different specifications of impact head 4 to be replaced according to the diameter of the pin 71, or to be replaced after wear, improving the versatility and maintainability of the tool.

[0039] Further, the main beam 1 is preferably a hollow square tube structure of metal material, and the length is greater than the width of the longitudinal beam frame 6. The force receiving part 5 and the force transmission arm 2 are respectively welded and fixed on the opposite two side walls of the hollow square tube structure.

[0040] By adopting a hollow structure, the inertial mass of the tool is significantly reduced under the premise of ensuring bending stiffness. According to Newton's second law, under the action of the same impact force, the tool with low inertia can obtain greater instantaneous acceleration, so that more impact energy is transmitted to the shaft pin 71, rather than being consumed in overcoming the inertia of the tool itself.

[0041] Further, as shown in Figure 1 The support sliding assembly 3 includes two nylon pads, which are respectively fixed on the two ends of the lower surface of the main beam 1 by countersunk screws. The distance between the two nylon pads is matched with the distance between the two guide surfaces of the longitudinal beam frame 6.

[0042] By using nylon pads, a soft contact sliding friction pair is formed between the main beam 1 and the longitudinal beam frame 6, which completely isolates the direct contact between the metal main beam and the aluminum alloy longitudinal beam, and eliminates the risk of scratching the surface of the longitudinal beam during disassembly.

[0043] As shown in Figure 4 The tool of the present embodiment further includes a hanging plate 81 and at least two connecting rods 82 (for example, long screws). The hanging plate 81 is provided with through holes corresponding to the connecting rods 82.

[0044] Through the above components, the tool can be converted into a lower shaft pin disassembly state: the main beam 1 is inverted below the longitudinal beam frame 6, the force arm 2 is stretched upward into the V-shaped groove 61 and abuts against the lower traction rod shaft pin 71. The hanging plate 81 is erected above the longitudinal beam frame 6, the connecting rod 82 vertically penetrates through the gap of the longitudinal beam frame 6 and connects the hanging plate 81 and the main beam 1, and the longitudinal beam frame 6 is clamped between the hanging plate 81 and the main beam 1 by locking the connecting rod 82 with a nut, so as to form a rigid closed loop structure.

[0045] This closed loop clamping structure overcomes the influence of gravity and firmly "hangs" the tool below the longitudinal beam. The operator only needs to apply a horizontal blow to the inverted force receiving part 5 in a ground upward looking state, and the whole closed loop structure will slide horizontally along the longitudinal beam, so as to knock out the lower shaft pin 71, thereby solving the pain point of difficult force application in the upward looking operation.

[0046] Specifically in this embodiment, the tool is designed to solve the problem that the traditional tool cannot be used due to the narrow internal space of the longitudinal beam frame 6 of the maglev train. The longitudinal beam frame 6 is usually made of aluminum alloy, and the space of the V-shaped groove 61 inside is extremely limited, and the shaft pin 71 of the traction rod 7 is often rusted and stuck due to long-term operation.

[0047] In use, first, the disassembly of the upper shaft pin (as shown in Figure 2 , 3 ) is carried out: the operator places the main beam 1 across the guide rail surface of the longitudinal beam frame 6 and positions it by using the support sliding components 3 (nylon pads) at both ends. At this time, the force arm 2 naturally stretches into the V-shaped groove 61, and the impact head 4 is accurately aligned with the shaft pin 71. Since there is a distance L (as shown in Figure 1 ) between the force receiving part 5 and the force arm 2, the operator stands at the side and horizontally knocks the force receiving part 5 with an iron hammer. At this time, the operator's line of sight can directly observe whether the force arm 2 below is displaced and whether the shaft pin 71 is loose. The hollow square tube structure of the main beam 1 can quickly transmit the impact wave and at the same time absorb high-frequency vibration, avoiding hand vibration. If there is a weld bead at the bottom of the V-shaped groove 61, the 20° inclined surface at the bottom of the force arm 2 will guide the tool to lift slightly and pass over the obstacle, without being stuck.

[0048] The disassembly of the lower shaft pin (as shown in Figure 4(As shown): The operator flips the main beam 1 and places it at the bottom of the longitudinal beam frame 6, so that the force transmission arm 2 pushes upward against the lower axle pin 71. Then, the hanging plate 81 is placed on top, and the upper and lower parts are locked together by passing two long connecting rods 82 through the gaps in the longitudinal beam. At this time, the fixture and the longitudinal beam frame 6 form a whole that can slide horizontally. The operator lies under the vehicle and horizontally taps the force-bearing part 5 on the main beam 1 (which is now located at the bottom). The fixture as a whole drives the top hanging plate 81 to move horizontally in sync, pushing out the lower axle pin 71. The connecting rods 82 not only play a suspension role, but also transmit horizontal shear force, ensuring the consistency of vertical movement.

[0049] This design not only greatly improves disassembly efficiency, but more importantly, it completely eliminates the potential damage risk to the expensive maglev train longitudinal beams caused by traditional disassembly methods through "soft contact sliding" and "precise guidance".

[0050] To achieve efficient and non-destructive disassembly of the maglev train's longitudinal beam frame 6 under extremely limited maintenance conditions, this tooling incorporates several targeted environmental adaptive optimizations in its structural design:

[0051] First, regarding the dynamic stability of the tooling under horizontal impact, such as Figure 1 As shown, the force-bearing part 5 and the force-transmitting arm 2 have a preset misalignment distance L along the length of the main beam 1. In actual operation, when a horizontal impact force is applied to the force-bearing part 5, due to the height difference and the distance L, the main beam 1 will be subjected to a flipping moment that attempts to press its front end down. This fixture utilizes this physical characteristic, in conjunction with the support sliding assembly 3 located at the front end, to convert this flipping moment into a vertical clamping force on the surface of the longitudinal beam frame 6. The greater the impact force, the tighter the fit between the support sliding assembly 3 at the front end and the surface of the longitudinal beam. This design effectively prevents the fixture from "bounced" or drifting laterally during a violent impact, ensuring that energy is stably transferred to the force-transmitting arm 2.

[0052] Secondly, in order to further reduce slip resistance and protect the surface of the longitudinal beam, such as Figure 3 As shown, the supporting sliding component 3 (nylon pad) has a preset thickness, creating a certain floating gap between the lower metal surface of the main beam 1 and the top surface of the longitudinal beam frame 6. The force transmission arm 2 extends through this floating gap into the V-groove 61, and the force transmission arm 2 does not directly contact the edge of the longitudinal beam frame 6. This design transforms the large-area surface contact between the main beam 1 and the longitudinal beam into limited contact of the supporting sliding component 3, which not only greatly reduces frictional resistance but also provides clearance for rivet heads, weld scars, or paint protrusions that may exist on the surface of the longitudinal beam frame 6, avoiding sliding jamming caused by flatness errors.

[0053] Secondly, in stress transfer structures, such as Figure 3As shown, the force transmission arm 2 is designed as a thick rigid cantilever structure, whose cross-sectional area is significantly larger than that of the impact head 4. This design takes into account the complex stress environment in the "off-site strike" working condition: the force transmission arm 2 mainly bears the huge bending moment due to the cantilever length, so it needs enough cross-sectional modulus to ensure the rigidity; while the impact head 4 mainly bears the axial compressive stress, and a thinner cylinder is used to match the diameter of the pin shaft 71 and concentrate the pressure. The impact head 4 is anchored by threads at the center of the shear neutral plane or end face of the force transmission arm 2, and if overload fracture occurs, only the low-cost impact head 4 needs to be replaced, thereby protecting the main force transmission structure.

[0054] In addition, as shown in Figure 1 and Figure 4 , the first surface (upper surface) of the main beam 1 is provided with a force receiving part 5, and the second surface (lower surface) is provided with a force transmission arm 2 and a support sliding assembly 3. When the upper shaft pin is disassembled ( Figure 1 state), the second surface is downward, and the support sliding assembly 3 is used for guidance; when the lower shaft pin is disassembled ( Figure 4 state), the main beam 1 is turned over by 180 degrees, and the first surface is downward, and the original force receiving part 5 becomes the force applying point located below. This highly reusable design makes the same main structure have a dual identity, reducing the number of tools carried on site.

[0055] Finally, for the extreme working condition of disassembling the lower shaft pin, as shown in Figure 4 , the connecting rod 82 (long screw rod) is not simply surrounded by the longitudinal beam from the outside, but is constructed to pass through the pre-set through hole on the internal reinforcing rib of the longitudinal beam frame 6 (as shown in the area where the connecting rod 82 passes through in Figure 4 ). When the connecting rod 82 passes through the through hole, it maintains a gap with the inner wall of the through hole. This design not only uses the connecting rod 82 to lock the hanging plate 81 and the inverted main beam 1 into a rigid closed loop, but also ingeniously uses the reinforcing rib hole inside the longitudinal beam frame 6 as a "secondary guide rail", limiting the possible left and right large swings of the tool during the upward strike, ensuring the safety and accuracy of the disassembly operation.

[0056] The above is only a preferred embodiment of the present application, and cannot limit the scope of the present application, that is, any equivalent changes and modifications made within the scope defined by the claims of the present application shall still fall within the protection scope of the present application.

Claims

1. A disassembly fixture for the traction rod pin of the longitudinal beam of a maglev train, characterized in that, include: The main beam (1) is a long, rigid structure; Support sliding components (3) are spaced apart on the lower surface of the main beam (1), and the support sliding components (3) have a smooth contact surface for fitting the surface of the longitudinal beam frame (6); The force transmission arm (2) extends downward from the lower surface of the main beam (1) and is located between the two support sliding components (3). The force transmission arm (2) is configured to extend into the V-groove (61) of the longitudinal beam frame (6). The impact head (4) is located at the end of the force transmission arm (2), and its extension direction is perpendicular to the length direction of the main beam (1); The force-bearing part (5) protrudes from the upper surface of the main beam (1); The force-bearing part (5) and the force-transmitting arm (2) are rigidly connected through the main beam (1). The tooling is configured to slide as a whole along the horizontal direction on the longitudinal beam frame (6) when the force-bearing part (5) is subjected to a horizontal impact, relying on the support sliding assembly (3).

2. The disassembly fixture for the traction rod pin of the longitudinal beam of a maglev train as described in claim 1, characterized in that, The vertical projection position of the force-bearing part (5) on the main beam (1) and the vertical projection position of the force transmission arm (2) on the main beam (1) are offset along the length direction of the main beam (1), and there is a preset distance (L) between them; the tooling is constructed such that when the support sliding assembly (3) is attached to the top surface of the longitudinal beam frame (6), the force-bearing part (5) is located in the space above the longitudinal beam frame (6), the force transmission arm (2) extends into the V-groove (61), and the force-bearing part (5) is located on the side away from the force transmission arm (2).

3. The disassembly fixture for the traction rod pin of the longitudinal beam of a maglev train as described in claim 1, characterized in that, The force transmission arm (2) includes a columnar body connected to the lower surface of the main beam (1), the cross-section of the columnar body is circular or annular; the bottom surface of the columnar body is provided with a guide slope; the guide slope is configured to avoid the bottom of the V-groove (61) when the tooling slides in the horizontal direction.

4. The disassembly fixture for the traction rod pin of the longitudinal beam of a maglev train as described in claim 1, characterized in that, The impact head (4) is a metal cylinder, and the side wall of the force transmission arm (2) is provided with a mounting hole. The impact head (4) is detachably fixed in the mounting hole. The axis of the impact head (4) is parallel to the lower surface of the main beam (1), and the impact head (4) is configured such that when the tooling is installed on the longitudinal beam frame (6), its axis is collinear with the axis of the traction rod pin (71) to be disassembled, so as to convert the horizontal sliding force into an axial thrust on the traction rod pin (71).

5. The disassembly fixture for the traction rod pin of the longitudinal beam of a maglev train as described in claim 1, characterized in that, The main beam (1) is a hollow square tube structure made of metal, and the length of the main beam (1) is greater than the width of the longitudinal beam frame (6); the force-bearing part (5) and the force-transmitting arm (2) are respectively welded and fixed to the opposite side walls of the hollow square tube structure.

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