CN201033525Y - A walking system for land-rail dual-purpose vehicle - Google Patents

Abstract

The utility model relates to a traveling system for a land-rail dual-purpose vehicle, in which a road traveling system is connected to the rail vehicle, and a vehicle body translation mechanism and a vehicle body lifting mechanism are connected at the mass center of the vehicle body. The main shaft of the rear road wheel set and the main shaft of the rear track wheel set rely on the V-belt pulley, and share a set of power system with the V-belt; The lower end of the fixed bracket is connected with a support shaft and a rolling bearing. The rolling bearing is in contact with the inner wall of the upper beam of the guide rail. The adjacent fixed brackets are connected with a fixed shaft. A rack is connected, and the rotating shaft between the two guide rails is connected with a V-belt pulley and an axle box. The gears at both ends of the rotating shaft are respectively meshed with the rack, and the axle box is fixedly connected to the chassis; the car body can realize the platform along the guide rails. The translation to the track; relying on the lifting mechanism of the car body, the railway wheel set falls on the track, so as to realize the mutual conversion of the land-rail dual-purpose vehicle.

Description

A walking system for land-rail dual-purpose vehicles

technical field

The utility model relates to a dual-purpose vehicle which can be used for rail transit and land, in particular to a walking and conversion system of a land-rail dual-purpose power supply line maintenance vehicle, which belongs to the technical field of urban rail transit.

Background technique

The completion of the urban rail transit system has greatly facilitated people's travel and alleviated the disadvantages of urban traffic to a large extent. It has the advantages of large transportation volume, fast speed, punctuality, low energy consumption, comfortable and convenient ride, etc. Electric energy is a necessary energy source for the rail transit system. Almost all rail transit equipment is inseparable from the power supply. Once the power supply is interrupted, the entire rail transit system will be paralyzed. Therefore there is an urgent need for some subway and light rail power supply line maintenance vehicles to ensure that urban rail transit has a highly safe and reliable power supply system.

Existing track catenary maintenance vehicles are usually parked on special tracks in the depot. When performing line maintenance, only after the subway and light rail vehicles stop running, can they drive from the depot to the line maintenance site for line maintenance. In the event of a power outage, it can only be driven from the depot to the accident site, which has the disadvantages of slow speed, long running time, and the inability to quickly move to the emergency repair point; Between locations, the track maintenance vehicle cannot reach the accident location. Only after the subway or light rail vehicle that has lost power supply is towed by the rail car can it drive to the accident location for electric emergency repair, which seriously causes long repair cycle and waste of resources. disadvantages. Therefore, many urban rail transit companies all want to improve this catenary overhaul vehicle or design a kind of low, fast and light line maintenance and repair vehicle that can replace the function of this car. Road-rail dual-purpose vehicles are rarely used in my country's urban rail transit, especially land-rail dual-purpose vehicles that can quickly switch between tracks and platforms have not been reported so far. With the continuous increase of cities, lines and mileage of urban rail transit, the problems faced in the maintenance and emergency repair of power supply lines are also increasing. It is urgent to develop a new type of land rail dual-purpose power supply line maintenance vehicle.

Contents of the invention

Land-rail dual-purpose vehicle refers to a special engineering vehicle that can run on the platform and on the track and can overhaul the power supply line.

The purpose of this utility model is to propose a walking and switching system for a land-rail dual-purpose vehicle, which overcomes the shortcomings and deficiencies of the existing track catenary maintenance vehicle. It can also run on the platform, and can quickly switch between the track and the platform. Usually parked on the platform, once a power outage occurs or the line needs to be repaired, it can drive into the track from the place closest to the accident site to quickly troubleshoot. After the fault is eliminated, it can return to the platform closest to the accident site to ensure rail traffic Unimpeded.

The overall technical idea of the utility model is: on the basis of the track running system of the rail car, increase the road running system and the land rail conversion system, and share a set of power transmission, and rely on the road running system to make the land rail dual-purpose vehicle usually stop at On the platform, when the electric power supply system needs to be overhauled or repaired, the land-rail dual-purpose vehicle drives to the edge of the platform, and the vehicle is lifted by the land-rail conversion system installed on the body, and moves from the platform to the track in parallel. During the process, relying on the vehicle body translation mechanism to drive the vehicle to translate, the road wheel set is put away, so that the railway wheel set is aligned and falls on the track, so as to realize the function of the land-rail dual-purpose vehicle running on the track; when the maintenance or emergency repair task is completed Finally, the land-rail dual-purpose vehicle can drive to the nearby platform, rely on the land-rail conversion system to lift the vehicle, and move from the track to the platform. During the conversion process, rely on the vehicle body translation mechanism to drive the vehicle to translate. Stretch out, rely on the car body lifting mechanism to make the road wheel pair contact the road surface, thereby realizing the function of the land-rail dual-purpose power supply line maintenance vehicle running on the platform.

A traveling system for a dual-purpose land-rail vehicle, which is characterized in that a road traveling system is connected to the rail vehicle at the same time, and a vehicle body translation mechanism and a vehicle body lifting mechanism are connected at the mass center of the vehicle body.

The rail car includes railway wheelsets, axle boxes, leaf springs, front brackets, U-shaped bolts, lifting lug brackets; lifting lugs, undercarriage, gear boxes, torque pull plates and torque bearings, railway wheelsets and The axle box is connected by bearings, the upper part of the axle box and the middle part of the leaf spring are fixed by U-shaped bolts, the front bracket and the lifting lug bracket are respectively fixed on the undercarriage, the upper end of the lifting lug is hinged with the lifting lug bracket through a pin shaft, and one end of the leaf spring It is hinged with the front bracket, and the other end is hinged with the lower end of the lifting lug. It is characterized in that: a gearbox and a small V-belt wheel are installed on the driving shaft of the rear railway wheel set, and the gear box through-pin shaft is connected with the torque pull plate, and the torque pull plate The upper part is connected with the torque support through the pin shaft, and the torque support is fixedly connected on the vehicle chassis.

The road traveling system includes a front traveling device and a rear traveling device; the rear traveling device includes a rear road wheel pair, a main shaft and an axle box, and the two ends of the main shaft are connected with the rear road wheel pair through the axle box, and it is characterized in that: two axle boxes It is fixedly connected with the connecting pull plate by bolts. There are two large V-belt pulleys connected to the main shaft, which are connected to the small V-belt pulley on the main shaft of the rear track wheel through a V-belt. There is a column between the two large V-belt pulleys. The upper end of the column is fixedly connected with the vehicle chassis, the lower end of the column is hinged with the connecting pull plate through the pin shaft, the connecting pull plate is hinged with the piston rod end of the hydraulic cylinder through the pin shaft, and the other end of the hydraulic cylinder is fixedly connected with the vehicle chassis through the pin shaft The hanging seat is hinged;

The front traveling device includes a front road wheel, a sliding sleeve and a hydraulic cylinder, and is characterized in that: the outer sleeve of the sliding sleeve is fixedly connected to the undercarriage at the front end of the track wheel, the inner sleeve of the sliding sleeve is L-shaped, and the front road wheel is connected to the L through the bearing. The right end of the inner sleeve of the L-shaped sliding sleeve is connected, the piston rod end of the hydraulic cylinder is hinged at the inflection point of the inner sleeve of the L-shaped sliding sleeve, and the other end of the hydraulic cylinder is hinged with the sliding outer sleeve through a pin.

The body translation mechanism includes "I"-shaped guide rails, fixed brackets, support shafts, rolling bearings, fixed shafts, rolling wheels, rotating shafts, V-belt wheels, axle boxes, gears, and racks. It is characterized in that: two "I" characters The guide rails are respectively vertical to the vehicle body. On the corresponding vehicle body where the "I"-shaped guide rails are located, a pair of fixed brackets are respectively connected. The lower end of each fixed bracket is connected with a support shaft and a rolling bearing. The inner wall of the upper beam of the "shaped guide rail is kissed, and a fixed shaft is connected between two adjacent fixed brackets. The fixed shaft is connected with a rolling wheel through a bearing, and the rolling wheel is kissed with the upper end surface of the upper beam of the "I" shaped guide rail. The inner wall on the right side of the bottom beam of the "I"-shaped guide rail is connected with a rack, and there is a rotating shaft between the two "I"-shaped guide rails, a V-belt wheel is connected in the middle of the rotating shaft, and gears are connected at both ends of the rotating shaft. The gears are meshed with the racks respectively, an axle box is connected between the V-belt wheel and the gears, and the axle box is fixedly connected with the undercarriage.

Each end of the two "I"-shaped guide rails is respectively connected to a rotating guide rail through a pin shaft, the piston rod end of each hydraulic cylinder is connected to the rotating guide rail respectively, and the cylinder tail of each hydraulic cylinder is connected to the corresponding The ends of the "I"-shaped guide rails are connected, and the ends of each rotating guide rail are respectively connected to a telescopic frame perpendicular to the ground.

The body lifting mechanism includes a lifting plate, a roller track, a roller, a scissor arm rod, a hydraulic cylinder and a support plate. It is characterized in that: the side wall of the lifting plate above the body lifting mechanism is connected with a short bracket. The support shaft is connected with a rolling bearing, and the rolling bearing is in contact with the upper wall of the outer bottom of the "I"-shaped guide rail; the opposite ends of the lift plate and the end of the support plate are respectively connected with roller tracks, and one end of the upper rod of the scissors arm is connected with the roller through a pin , the other end is hinged with the fixed support on the lifting plate, one end of the lower rod of the scissor arm is connected with the roller through the pin shaft, and the other end is hinged with the fixed support on the support plate, the rollers are respectively embedded in the upper and lower roller tracks, and the piston of the hydraulic cylinder The rod end is hinged with the upper support of the hydraulic cylinder fixed on the upper rod of the scissor arm through the pin shaft, while the tail end of the cylinder body of the hydraulic cylinder is connected with the lower support of the hydraulic cylinder fixed on the lower rod of the scissor arm through the pin shaft. seat hinged.

In the track running system of the rail vehicle of the utility model, the main function of the leaf spring is to ease the impact and attenuate the vibration. In addition, it also plays the role of elastic positioning, so that the wheel has a suitable vertical and horizontal direction for the axle box. Elastic positioning function; the joint action of the torque support and the torque pull plate can make the gearbox have a suitable relative rotation with respect to the axle, and can also ease and attenuate the interaction between the car body and the gearbox.

In the road walking system, in order to adapt to the function of vehicles walking on the platform and easy to turn, the walking system mainly adopts the structure of three wheels, and the V-shaped belt mainly transmits the power from the rear track wheel gearbox in the track walking system. , so as to drive the road wheel, so that the road wheel and the track wheel share a set of power systems. The expansion and contraction of the hydraulic cylinder hinged to the connecting pull plate and the upper hanging seat can make the rear wheel pair move in a circular arc around the lower hinge point of the column, so that the rear road wheel pair can shrink on the track under the vehicle chassis and on the platform. The function of supporting on the road surface. The column and the sliding jacket mainly bear the weight of the car body and bear various dynamic and static forces. The expansion and contraction of the hydraulic cylinder hinged with the sliding outer sleeve and the sliding inner sleeve can make the sliding inner sleeve move up and down, and drive the front wheels to move up and down, so that the front wheels can shrink on the track under the vehicle chassis and support on the road surface on the platform on the function.

In the vehicle body translation mechanism, in order to make the vehicle body translate relative to the "I"-shaped guide rail, firstly, the power drives the V-belt wheel to rotate, the V-belt wheel drives the rotating shaft, the rotating shaft drives the gear, the gear moves on the rack, and the movement of the gear simultaneously drives One rolling wheel and two rolling bearings translate along the "I"-shaped guide rail to realize the four-wheel positioning translation structure and minimize the resistance during the translation process of the vehicle body.

The hydraulic cylinder connected between the "I"-shaped guide rail and the rotating guide rail, when the piston rod of the hydraulic cylinder shrinks, the rotating guide rail will rotate 90 degrees around the pin shaft, so that the rotating guide rail and the "I"-shaped guide rail are on the same line On a straight line, at the same time, the telescopic frame perpendicular to the ground connected to the end of the rotating guide rail stretches out. One end of the telescopic frame falls on the ground of the platform, and the other end falls on the track subgrade by the body lifting mechanism. After the car body is translated, the telescopic frame retracts. , turn the rail back to its original position.

In the body lifting mechanism, the movement of the lifting plate along the "I"-shaped guide rail is realized by the hydraulic cylinder connected between the "I"-shaped guide rail and the lifting plate to drive the rolling bearing to slide. The body lifting process also relies on the hydraulic cylinder to push the scissors. The rod member on the arm pushes up the lifting plate to realize. After the lifting task is completed, the piston rod of the hydraulic cylinder is fully retracted, and the lifting mechanism of the vehicle body is restored under the vehicle chassis.

Usually, during the traveling process of the dual-purpose land-rail vehicle of the present utility model, the lifting and translation mechanism of the vehicle body relies on a lockset to be locked with the undercarriage, and should be unlocked when the land-rail conversion is required.

The utility model has a land-rail dual-purpose vehicle, which can not only run on the track but also run on the platform, and can quickly switch between the track and the platform. Usually parked on the platform, once a power outage occurs or the line needs to be repaired, it can drive into the track from the place closest to the accident site to quickly troubleshoot. After the fault is eliminated, it can return to the platform closest to the accident site to ensure rail traffic It is unimpeded and provides strong technical support for the normal operation of the growing urban rail transit.

Description of drawings

Below in conjunction with accompanying drawing and example the utility model is described in further detail.

Fig. 1 is a front view of the overall structure of the walking system of a dual-purpose land rail vehicle of the present invention;

Fig. 2 is a top view of the overall structure of the walking system of a dual-purpose land rail vehicle of the present invention;

Fig. 3 is a front view of the structure of a track walking system of a dual-purpose land rail vehicle of the present invention;

Fig. 4 is a top view of the structure of a track walking system of a dual-purpose land rail vehicle of the present invention;

Fig. 5 is a front view of the structure of a road traveling system of a dual-purpose land rail vehicle of the present invention;

Fig. 6 is a top view of the structure of the road traveling system of a dual-purpose land rail vehicle of the present invention;

Fig. 7 is a front view of a body translation mechanism of a dual-purpose land rail vehicle of the present invention;

Fig. 8 is a top view of a body translation mechanism of a dual-purpose land rail vehicle of the present invention;

Fig. 9 is a front view of the lifting mechanism of the body of the dual-purpose land rail vehicle when the body of the utility model is raised.

1. Car underframe, 2. Railway wheel set, 3. Axle box, 4. Leaf spring, 5. Front support, 6. U-bolt, 7. Lifting lug bracket, 8. Lifting lug, 9. Gear box, 10 .Torque pull plate, 11. Torque support, 12. Small V-belt wheel, 13. Rear road wheel set, 14. Connecting pull plate, 15. Large V-belt pulley, 16. V-belt, 17. Column, 18. Hydraulic cylinder, 22. Hanging seat; 19. Front road wheel, 20. Sliding sleeve outer cover, 21. Sliding sleeve inner sleeve, 23. "I"-shaped guide rail, 24. Fixed bracket, 25. Support shaft, 26. Rolling bearing, 27. fixed shaft, 28. rolling wheel, 29. rotating shaft, 30. gear, 31. rack, 32. rotating guide rail, 33. telescopic frame, 34. V pulley, 35. lifting plate, 36. roller track , 37. Roller, 38. Scissor arm bar, 39. Support plate, 40. Short bracket, 41. Fixed support, 42. Upper support of hydraulic cylinder, 43. Lower support of hydraulic cylinder.

Detailed ways

1. Track running system: the railway wheel set 2 is connected to the axle box 3 through bearings, the upper part of the axle box and the middle part of the leaf spring 4 are fixed by U-shaped bolts 6, and the front bracket 5 and the lifting lug bracket 7 are respectively fixed on the undercarriage 1 On, the upper end of the lifting lug 8 is hinged with the lifting lug bracket 7 through the pin shaft, one end of the leaf spring 4 is hinged with the front bracket 5, and the other end is hinged with the lower end of the lifting lug 8, and the rear railway wheel pair 2 driving shaft is equipped with a gearbox 9 and a small V-belt pulley 12, gear box 9 pass pins are connected with torque pull plate 10, and torque pull plate 10 tops are connected with torque support 11 by pin shaft, and torque support 11 is welded on the vehicle chassis 1.

2. Highway running system: both ends of the main shaft of the rear traveling device are connected to the rear road wheel pair 13 through the axle box, and the two axle boxes are fixedly connected to the connecting pull plate 14 through bolts. The type belt 16 is connected with the small V-belt pulley 12 on the main shaft of the rear track wheel. Between the two large V-belt wheels, there is a column 17. The upper end of the column is fixedly connected with the chassis 1, and the lower end of the column is connected with the connecting pull plate through the pin shaft. 14 is hinged, the connecting pull plate is hinged with the piston rod end of the hydraulic cylinder 18 through the pin shaft, and the other end of the hydraulic cylinder is hinged with the upper hanger 22 fixed on the vehicle chassis through the pin shaft; On the undercarriage 1 at the front end of the track wheel, the inner sleeve 21 of the sliding sleeve is L-shaped, and the front road wheel 19 is connected with the right end of the L-shaped sliding sleeve inner sleeve 21 through a bearing, and the piston rod end of the hydraulic cylinder 18 is hinged on the L At the inflection point of the type sliding sleeve inner sleeve 21, the other end of the hydraulic cylinder is hinged with the sliding outer sleeve 20 through a pin shaft.

3. Vehicle body translation mechanism: two "I"-shaped guide rails 23 are respectively perpendicular to the vehicle body, and on the corresponding vehicle body at the position of the "I"-shaped guide rails, fixed bracket pairs 24 are respectively connected, and the lower end of each fixed bracket is There are support shafts 25 and rolling bearings 26 connected, and each rolling bearing is respectively kissed with the inner wall of the upper beam of the "I"-shaped guide rail. A fixed shaft 27 is connected between two adjacent fixed brackets, and the fixed shaft is connected with a rolling wheel through the bearing. 28. The rolling wheel is in contact with the upper surface of the upper beam of the "I"-shaped guide rail; the inner wall on the right side of the bottom beam of the "I"-shaped guide rail is connected with a rack 31, and there is a rotating shaft 29 between the two "I"-shaped guide rails , the center of the rotating shaft is connected with a V-belt pulley 34, the two ends of the rotating shaft are connected with a gear 30, and the gears mesh with the rack respectively, and the axle box 3 is connected between the V-belt pulley 34 and the gear 30, and the axle box and the undercarriage 1 fixed connection. Each end of the two "I"-shaped guide rails is respectively connected to a rotating guide rail 32 through a pin shaft, the piston rod end of each hydraulic cylinder is connected to the rotating guide rail respectively, and the cylinder tail of each hydraulic cylinder is connected to the corresponding The ends of the "I" shaped guide rails are connected, and each rotating guide rail end is respectively connected with a telescopic frame 33 perpendicular to the ground.

4. Body lifting mechanism: the side wall of the lifting plate 35 above the body lifting mechanism is connected with a short bracket 40, and a rolling bearing 26 is connected to the short bracket through a support shaft 25, and the rolling bearing is in contact with the upper wall of the outer bottom of the "I"-shaped guide rail The opposite end faces of lifting plate 35 and supporting plate 39 ends are respectively connected with roller tracks 36, and one end of rod member 38 on the scissors arm is connected with roller 37 by a pin, and the other end is hinged with fixed support 41 on lifting plate 35 , one end of the lower rod of the scissor arm is connected with the roller 37 through a pin, and the other end is hinged with the fixed support 41 on the support plate 39. The upper bearing 42 of the hydraulic cylinder on the rod on the arm is hinged, and the cylinder body tail end of the hydraulic cylinder is hinged with the lower bearing 43 of the hydraulic cylinder fixed on the lower rod of the scissors arm through a pin.

When the land-rail dual-purpose vehicle is turned to the track by the platform, at first the vehicle is driven to the platform, and the lock between the "I"-shaped guide rail 23 and the undercarriage 1 is released, and when the "I"-shaped guide rail two When the piston rod of the hydraulic cylinder at the end is fully contracted, the rotating guide rail 32 rotates 90 degrees around the pin shaft, so that the "I"-shaped guide rail 23 and the rotating guide rail 32 form a linear guide rail; under the meshing motion of the gear and the rack, " The "I"-shaped guide rail extends to the top of the track relative to the car body, and the telescopic frame 33 at both ends of the rotating guide rail 32 stretches out, and one end falls on the road surface of the platform; The hydraulic cylinder in between drives the rolling bearing 26 to slide, so that the lifting plate drives the entire lifting mechanism to move along the "I"-shaped guide rail to the track, and locks the lifting mechanism after it is in place. The upper bar of the scissor arm drives the rolling bearing 26 to roll, thereby driving the scissor arm structure of the body lifting device to stretch until the support plate 39 touches the upper surface of the sleeper between the two rails, after that, the telescopic frame at the platform end and the body lifting device simultaneously Stretch, so that the whole car body rises, the power system transmits power to the V-belt pulley 34, the V-belt pulley drives the rotating shaft 29, and the rotating shaft drives the gear 30 to mesh and roll on the rack 31, and the movement of the gear drives a rolling wheel at the same time 28 and two rolling bearings 26 translate along the "I"-shaped guide rail 23 to realize the four-wheel positioning translation, so that the entire car body moves to the top of the track; The lower hinge point of the column 17 moves in an arc, the rear road wheel pair is retracted, and the front road wheel 19 is also driven by the contraction of the piston rod of the hydraulic cylinder, which drives the sliding inner sleeve 21 to rise, and at the same time drives the road front wheel to be retracted; the telescopic frame 33 Indent, turn the beam 32 back, the "I"-shaped guide rail shrinks under the underframe and locks with the car body; the lifting mechanism drives the car body down slowly, and finally the lifting mechanism shrinks under the underframe 1, and the railway wheel set 2 landed on the track and completed the transition from road to track. The operation process is basically the opposite of the above-mentioned process when turning from track driving to road driving.

The utility model can be widely used in the maintenance and inspection of rail transit lines.

Claims (5)

1. A land-rail dual-purpose vehicle traveling system is characterized in that: it is to be connected with road traveling system simultaneously on rail car, is connected with car body translation mechanism and car body elevating mechanism at the center of mass of car body. 2. The walking system of a dual-purpose land-rail vehicle according to claim 1, characterized in that: a gear box and a small V-belt wheel are installed on the driving shaft of the rear railway wheel set, and the gear box is connected with the torque pull plate through a pin shaft. Connect, and the upper part of the torque pull plate is connected with the torque support through the pin shaft, and the torque support is fixedly connected on the vehicle chassis. 3. The walking system of a dual-purpose land-rail vehicle according to claim 1, characterized in that: the two-axle box of the rear traveling device is fixedly connected to the connecting pull plate through bolts, and two large V-belt pulleys are connected to the main shaft, and The V-belt is connected to the small V-belt pulley on the main shaft of the rear track wheel. There is a column between the two large V-belt wheels. The pull plate is hinged with the piston rod end of the hydraulic cylinder through the pin shaft, and the other end of the hydraulic cylinder is hinged with the upper suspension seat fixed on the vehicle chassis through the pin shaft; The outer casing of the sliding sleeve of the front traveling device is fixedly connected to the undercarriage at the front end of the track wheel. The inner sleeve of the sliding sleeve is L-shaped. The front road wheel is connected to the right end of the inner sleeve of the L-shaped sliding sleeve through a bearing. The piston rod of the hydraulic cylinder One end is hinged at the inflection point of the inner sleeve of the L-shaped sliding sleeve, and the other end of the hydraulic cylinder is hinged with the sliding outer sleeve through a pin shaft. 4. The walking system of a dual-purpose land-rail vehicle according to claim 1, characterized in that: the two "I"-shaped guide rails of the vehicle body translation mechanism are respectively perpendicular to the vehicle body, and at the position where the "I"-shaped guide rails are located, Corresponding to the car body, a pair of fixed brackets are respectively connected. The lower end of each fixed bracket is connected with a support shaft and a rolling bearing. There is a fixed shaft connected between the brackets, and the fixed shaft is connected with a rolling wheel through a bearing, and the rolling wheel kisses the upper end surface of the upper beam of the "I"-shaped guide rail; the inner wall on the right side of the bottom beam of the "I"-shaped guide rail is connected with a rack. There is a rotating shaft between the two "I"-shaped guide rails. A V-belt pulley is connected in the middle of the rotating shaft. Gears are connected to both ends of the rotating shaft. The gears mesh with the rack respectively, and a shaft is connected between the V-belt wheel and the gear. The axle box is fixedly connected to the chassis; each end of the two "I"-shaped guide rails is respectively connected to a rotating guide rail through a pin shaft, and the piston rod end of each hydraulic cylinder is respectively connected to the rotating guide rail. The cylinder tail of the cylinder is connected with the end of the corresponding "I"-shaped guide rail through the pin shaft, and each rotating guide rail end is respectively connected with a telescopic frame perpendicular to the ground. 5. The walking system of a dual-purpose land-rail vehicle according to claim 1, characterized in that: the side wall of the lifting plate above the body lifting mechanism is connected with a short bracket, and the short bracket is connected with a rolling bearing through a support shaft, and the rolling bearing It is in contact with the upper wall of the outer bottom of the "I"-shaped guide rail; the opposite ends of the lifting plate and the end of the supporting plate are respectively connected with roller tracks, and one end of the upper rod of the scissors arm is connected with the roller through a pin, and the other end is connected with the lifting plate. The upper fixed support is hinged, one end of the lower rod of the scissor arm is connected to the roller through the pin, and the other end is hinged to the fixed support on the support plate. The upper support of the hydraulic cylinder connected to the upper rod of the scissor arm is hinged, while the tail end of the cylinder body of the hydraulic cylinder is hinged with the lower support of the hydraulic cylinder fixed on the lower rod of the scissor arm through a pin shaft.

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