CN211032068U - Road-rail dual-purpose transport vehicle set - Google Patents

Abstract

The utility model discloses a road-rail dual-purpose transport vehicle set, relating to the technical field of railway freight cars; the device comprises at least two highway-railway semitrailers, at least one knuckle bogie and two end bogies, wherein each knuckle bogie is positioned between two adjacent highway-railway semitrailers and is connected with the highway-railway semitrailers on two sides of the knuckle bogie through a train set coupling device; the end part bogies are positioned at two ends of the train set, one end of each end part bogie is connected with the road-railway dual-purpose semitrailer through an end part connecting and hanging device, and the other end of each end part bogie is connected and hung with the railway locomotive or the railway wagon through a coupler buffer device; through implementing this technical scheme, can effectively solve in the dual-purpose transport vechicle group of current highway railway invalid dead weight heavier, the vehicle tip clearance is great, the inhomogeneous technical problem of the vertical power transmission of train, can realize that the group of cars marshals fast and even hangs, reduces the invalid dead weight of group of cars, can reduce the vehicle tip clearance, the vertical power transmission of train is even, can effectively improve group of cars performance and transportation economy.

Description

Road-rail dual-purpose transport vehicle set

Technical Field

The utility model relates to a railway freight car technical field especially relates to a dual-purpose transport vechicle group of highway-railway.

Background

The multi-type intermodal transportation can give full play to the overall advantages and the combination efficiency of various transportation modes, reduces the loading and unloading times of goods in different transportation modes through the rapid transportation of the transportation units, provides seamless connection 'door-to-door' service for goods owners, and represents the development direction of comprehensive transportation. The existing highway and railway dual-purpose truck comprises two special bogies and a highway and railway dual-purpose semitrailer, wherein two ends of the highway and railway dual-purpose semitrailer are respectively connected with the coupling devices of the special bogies, and if a plurality of highway and railway dual-purpose semitrailers need to be marshalled, the car coupler buffer devices of the adjacent special bogies need to be mutually connected to form a transport vehicle set.

However, in the process of implementing the embodiment of the present invention, the inventor of the present application finds that the above prior art has at least the following technical problems: on one hand, the conventional railway wagon coupler buffer devices are adopted for connection and conversion between the conventional highway and railway dual-purpose transport vehicle groups, the connection structure is complex, the dead weight of the transport vehicle groups is heavy, the gap between vehicles is large, meanwhile, the railway wagon coupler buffer devices are installed in a traction beam of a special bogie frame, and a coupling device coupled with a highway and railway dual-purpose semitrailer is installed on the upper plane of the special bogie frame, so that the height of the coupling center inside the transport vehicle groups is changed in a gradient alternating manner, the longitudinal force of a train is transmitted unevenly, additional bending moment is generated in the height direction of the vehicle groups, and the influence on the running performance of the transport vehicle groups is; on the other hand, when the existing highway and railway dual-purpose transport vehicle set is marshalled, the coupler buffer device end of the special bogie cannot be in coupling with the highway and railway dual-purpose semitrailer, the special bogie can only be in unidirectional marshalling according to the swinging direction of the special bogie, the marshalling coupling efficiency is low, difficulty is brought to the use and management of the transport vehicle set, the marshalling speed is low, and the transport economy is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems that the prior road and railway dual-purpose transport vehicle set has heavier dead weight and larger clearance between vehicles, the prior special bogie can only carry out one-way marshalling and the longitudinal force in the vehicle set is transmitted unevenly, the utility model aims to provide a road and railway dual-purpose transport vehicle set, which aims at simplifying the internal connecting device of the road and railway dual-purpose vehicle set, reducing the dead weight of the vehicle set, reducing the clearance between the vehicles, increasing the vehicle marshalling quantity and improving the transportation economy; the second purpose is that the arbitrary bidirectional coupling marshalling of the special bogie in the vehicle set and the highway-railway dual-purpose semitrailer can be effectively realized, the marshalling speed is improved, and the use and the management of the vehicle set are convenient; the third purpose is that the height of the coupling center in the road-rail dual-purpose transport vehicle set can be effectively ensured to be consistent, the longitudinal force of the train is uniformly transmitted, the horizontal direction of the vehicle set cannot generate additional resistance, multiple gradient transfer in height on the longitudinal force of the train can be effectively avoided, the attenuation of the longitudinal force is reduced, the transport energy loss is further reduced, the transport economy is improved, and the train operation performance is good; the fourth purpose is that the marshalling and coupling efficiency of the combined transport vehicle set for the highway and railway can be effectively improved, and the requirements of the freedom degrees of nodding, shaking and rolling of the railway operation working condition of the combined transport vehicle set for the highway and railway can be met.

The utility model adopts the technical scheme as follows:

a road-rail dual-purpose transport vehicle set comprises

The highway-railway semitrailers are sequentially arranged along the advancing direction of the highway-railway semitrailer;

each joint bogie is positioned between two adjacent highway-railway dual-purpose semitrailers, and a train set coupling device is arranged on each joint bogie, and each joint bogie is respectively connected with the highway-railway dual-purpose semitrailers on two sides of the train set coupling device through two ends of the train set coupling device so as to complete coupling of the joint bogie and the two adjacent highway-railway dual-purpose semitrailers on two sides of the joint bogie in the advancing direction;

the two end part bogies are respectively positioned at two ends of a train set, an end part coupling device and a coupler buffer device are arranged on the end part bogies, one end of each end part bogie is coupled with a road-rail dual-purpose semitrailer through the end part coupling device, and the other end of each end part bogie is coupled with a railway locomotive or a railway wagon through the coupler buffer device.

Optionally, the joint bogie is a two-axle welding frame type bogie, the joint bogie comprises a joint welding frame, two ends of the joint welding frame are symmetrically arranged about the center, the train set coupling device comprises a train set coupling hanging plate, a train set coupling hanging seat and a train set connecting round pin, the middle of the train set coupling hanging plate is connected with the joint welding frame, two ends of the train set coupling hanging plate are respectively provided with a train set coupling section, and the train set coupling hanging seat is arranged in an end beam of the highway-railway dual-purpose semitrailer; the train set coupling sections at two ends of the train set coupling plate are respectively inserted into train set coupling seats in the end beams of the highway-railway dual-purpose semitrailer at two sides of the traveling direction of the train set coupling sections, and respectively penetrate through the train set coupling plate and corresponding train set coupling seat pin holes from bottom to top through the train set connecting round pins so as to finish coupling of the knuckle bogie and two adjacent highway-railway dual-purpose semitrailers at two sides of the traveling direction of the knuckle bogie. The technical scheme simplifies the internal traction coupling structure of the road-rail dual-purpose transport vehicle set, reduces the invalid dead weight of the transport vehicle set, reduces the gaps among the vehicles in the train, increases the vehicle marshalling quantity and improves the transportation economy of the vehicle set; meanwhile, the joint bogie can be effectively connected with the highway and railway semitrailer in any two directions, the marshalling speed is improved, and the use and the management of a transport vehicle set are facilitated; in addition, according to the technical scheme, the train unit coupling sections arranged at two ends of the same train unit coupling plate are connected with the train unit coupling seats in the end beams of the highway-railway semitrailer at two sides of the advancing direction of the same train unit coupling plate, so that the rapid marshalling and coupling between the highway-railway semitrailers are realized, the existing mode that the traditional railway wagon train coupler coupling device or the auxiliary connecting device needs to be used for marshalling and coupling inside a transport train unit is eliminated, the technical problems that the longitudinal force of a train is transmitted unevenly and the additional resistance is easily generated in the horizontal direction of the train unit due to the fact that the height of the coupler coupling device and the coupling center of the highway-railway combined transport coupling device are not consistent can be effectively avoided, the train operation safety is improved, and the train operation.

Optionally, the joint welding truss comprises a joint truss longitudinal beam and a joint truss cross beam symmetrically arranged about the center of the joint truss longitudinal beam, joint truss slopes and a joint truss bearing platform are symmetrically arranged at two ends of the joint truss longitudinal beam, and the joint truss slopes are inclined downwards from the middle of the joint welding truss along one side close to the highway-railway dual-purpose semitrailer; the joint frame bearing platform is located on the top end, close to the joint frame slope, of the joint frame longitudinal beam, and the joint frame bearing platform is of a horizontally arranged plane structure and is used for bearing vertical loads of the highway-railway dual-purpose semitrailer.

Optionally, the joint frame slope of the joint welding frame has two-stage slopes, and the lower slope of the joint frame slope is larger than the upper slope of the joint welding frame, so that when the joint bogie is pushed into the lower plane of the end beam of the dual-purpose semitrailer for highway and railway through the joint frame slope to be connected, the frame of the dual-purpose semitrailer for highway and railway can be automatically lifted to be separated from the rail, and in the design process, the height of the joint frame slope meets the safety distance between the dual-purpose semitrailer for highway and railway and the rail surface after.

Optionally, the train set connection hanging plate is of a dumbbell-shaped symmetrical flat plate structure, a fixed mounting seat is arranged in the middle of the train set connection hanging plate, and the train set connection hanging plate is fixed on the joint welding framework through the fixed mounting seat; and the coupling centers of the train unit coupling sections at the two ends of the train unit coupling plate are symmetrically arranged around the center of the train unit coupling plate, the heights of the coupling centers at the two ends of the train unit coupling plate are the same, and the train unit coupling seats at the two ends are positioned on the same horizontal plane, so that additional bending moment is not generated in the high direction in the advancing process of the train unit of the highway-railway dual-purpose transport vehicle. Specifically, the vehicle group coupling section wedge-shaped horizontal direction guide profiles and the vertical direction guide profiles at the two ends of the vehicle group coupling plate are symmetrically arranged around the center of the vehicle group coupling plate, so that the vehicle group coupling plate integrally forms a dumbbell-shaped symmetrical structure, and additional stress is not generated in the horizontal direction of the train.

Furthermore, the car group hitch section mounting holes at the two ends of the car group hitch plate are internally embedded with spherical hinges, the spherical hinges are positioned between the car group connecting round pins and the mounting holes during hitching, the spherical hinges comprise a spherical core and two outer spherical sleeves, the middle of the spherical core is provided with a pin hole for the car group connecting round pins to pass through, the upper end surface and the lower end surface of each outer spherical sleeve are respectively provided with a blocking shoulder, and a gap is arranged between the spherical core and the outer spherical sleeve, so that the spherical core has head shaking freedom and limited side rolling and point head freedom relative to the outer spherical sleeves. So the ball pivot makes the dual-purpose semitrailer frame of highway railway become the second force pole structure to combine the train set to link the project organization of link plate, realize the direction of the longitudinal force of train set along linking the line all the time ingeniously, and the train set links the link point at link plate both ends and is located same horizontal direction, the round pin is connected to the train set and only bears the shear force and does not bear the moment of flexure, and keep linking the central altitude unanimity of linking the device both ends, the even direction of height of the longitudinal force transmission of train set can not produce additional moment of flexure, can effectively improve transport vehicle set running performance.

Further, both ends at the joint welding framework all are provided with the elasticity uide bushing, the group of cars connects the round pin and passes the elasticity uide bushing from bottom to top in proper order, group of cars link plate and group of cars link the seat and in order to accomplish the joint bogie and the connection of two adjacent road-railway semitrailers of direction of travel both sides rather than, concretely, the elasticity uide bushing includes middle elastomer and inside and outside steel bushing, the both ends of joint welding framework all are provided with the mounting hole that is used for installing the elasticity uide bushing, the elasticity uide bushing is used for constraining group of cars to connect the round pin and only produces vertical motion for the joint welding framework when the up-and-down motion, when group of cars connects the round pin, the ball core is linked the seat and is linked together for group of cars to link the board and take place some head and side roll, group of cars.

Further, have in the train set linking and hanging seat with the train set linking and hanging section adaptation's of the train set linking and hanging plate direction interface, and the both sides inner wall along the train set linking and hanging section insertion direction of the train set linking and hanging plate in the direction interface installs side wearing plate symmetrically, and the atress shoulder and the contact of side wearing plate of train set linking and hanging section both sides, the mounting hole that the train set links the hanging plate both ends is coaxial setting rather than the train set connection round pin hole on the corresponding train set linking and hanging seat respectively, just direction interface and inserted train set linking and hanging section up end and terminal surface down all have the clearance to make the train set linking and hanging seat have the some head degree of freedom for the mounting hole that the train set links the hanging plate. Specifically, the guide interface is embedded in an end beam of the highway-railway dual-purpose frame, the horizontal cross section of the guide interface forms a concave shape similar to a V shape, and the side abrasion plates on the two sides can play a reliable guide connection role in a train set connection hanging section of a train set connection hanging plate; the side abrasion plate countersunk head is connected with the tenon bolt and the inner side wall of the guide connecting port, so that the connection is reliable, the disassembly, the maintenance and the replacement are convenient, and the limit stability is ensured; compared with the existing traction coupling structure, the coupling mode adopting the technical scheme can effectively avoid the additional increase of invalid weight, ensure the stability of rail transportation of the rail-road dual-purpose wagon, and further greatly improve the economic efficiency of rail transportation.

Optionally, the end bogie is a two-axle welded frame bogie, the end bogie comprises an end welded frame, the end coupling device comprises an end coupling plate, an end coupling seat and an end coupling round pin, the end coupling plate comprises a fixing section and an end coupling section, the end coupling plate is connected with the end welded frame through the fixing section, the end coupling seat is located in an end beam at the end of the semitrailer for both public and railway, one end of the end bogie is inserted into the end coupling seat through the end coupling section and penetrates through the end coupling plate and an end coupling seat pin hole from bottom to top through the end coupling round pin, so that coupling of the end bogie and the semitrailer for both public and railway is completed; and a car coupler buffer device is arranged at the other end of the end part bogie.

Optionally, the end welding frame comprises an end frame longitudinal beam and four sections of end frame cross beams distributed along the length direction of the end frame longitudinal beam, the four sections of end frame cross beams are all vertically connected with the end frame longitudinal beam, the end frame cross beams on two sides of the end frame longitudinal beam are symmetrically arranged relative to the end frame longitudinal beam, an end frame slope and an end frame bearing platform are arranged on the end frame longitudinal beam, the end frame slope inclines downwards from the middle of the end welding frame along one side of the end welding frame close to the highway-railway dual-purpose semitrailer, the end frame bearing platform is located at the top end of the end frame longitudinal beam close to the end frame slope, and the end frame bearing platform is of a plane structure and is used for bearing vertical load of the highway-railway; the coupling position of the end coupling device and the road-railway dual-purpose semitrailer is positioned at the middle point of two shafts of the end bogie; and the car coupler buffer device is arranged at one end of the end part framework longitudinal beam, which is far away from the semitrailer for both highway and railway.

Optionally, the end frame slope has a two-stage slope, and the lower slope is greater than the upper slope, so that when the end bogie is pushed into the lower plane of the end beam of the semitrailer for highway and railway through the end frame slope for coupling, the frame of the semitrailer for highway and railway can be automatically lifted to separate from the rail, and in the design process, the height of the end frame slope meets the safety distance from the rail surface after the semitrailer for highway and railway is lifted.

Optionally, the center of the end coupling device is higher than the center of the coupler buffer device, the center of gravity of the end bogie is arranged on one side of the coupling center of the end coupling device and the convertible car, which is close to the coupler buffer device, and the end frame bearing platform is arranged on the other side of the end bogie frame.

Furthermore, the contour of the end connecting section of the end connecting plate is the same as the contour structures of the train unit connecting sections at the two ends of the train unit connecting plate of the train unit connecting and hanging device, and the end connecting and hanging seat and the end connecting round pin in the end connecting and hanging device are the same as the structure of the train unit connecting and hanging seat and the train unit connecting round pin in the train unit connecting and hanging device and the principle of the connecting and hanging mode of the end connecting and hanging device.

Optionally, the semitrailer for highway and railway comprises a frame, a vehicle axle, a protective device, a supporting device and an axle air suspension device with a lifting function, wherein the frame comprises a front end beam, a rear end beam and a middle beam connecting the front end beam and the rear end beam, so that the frame forms a gooseneck structure with a high front part and a low rear part.

As mentioned above, the present invention has at least the following advantages compared with the prior art:

1. the utility model discloses can realize constituting a set of railway carrying unit train with the dual-purpose semitrailer marshalling of N public railway through two tip bogies and (N-1) middle joint bogie, wherein two tip bogies, a middle joint bogie and two dual-purpose semitrailers of public railway constitute the shortest transport vehicle group, the quantity of the dual-purpose semitrailer of public railway in the transport vehicle group can be according to the increase and decrease of goods source organization condition, the dual-purpose semitrailer marshalling of public railway is even hung and is compiled and subtract and hang convenient flexibility, satisfy the needs that goods source railway transportation moved in groups, be favorable to improving the transportation performance, reduce the transportation energy loss in order to improve transportation economy, full play railway transportation is apart from the big advantage of long freight volume.

2. The utility model can realize the quick marshalling and coupling between the semitrailer for both railway and highway and a railway locomotive or a railway wagon, so that the train set can be operated in a single row and can also be operated in marshalling with the railway wagon, thereby being beneficial to the railway train organization; the rail-road semitrailer can be effectively connected and marshalled in two directions, the marshalling requirements of any two directions of the knuckle bogies and the rail-road semitrailer are met, the rail-road semitrailer can directly run on a highway after being unpackaged, the problems of 'the first kilometer' and 'the last kilometer' in railway freight transportation can be solved, the 'door-to-door' transportation of one vehicle to the bottom and integral loading and unloading is realized, the freight reversing frequency is reduced, and the comprehensive transportation benefit is improved.

3. The utility model discloses marshalling of dual-purpose transport vechicle group of highway-railway is even to be hung simple structure, cancelled the current mode that needs to marshal even the hanging at transport vechicle group inside adoption traditional railway freight car coupler even hanging device or auxiliary connection device, the internal traction of dual-purpose transport vechicle group of highway-railway is even hanging the structure has been simplified, not only avoided marshalling even hanging the structure complicacy to cause the transport vechicle group invalid heavier technical problem of dead weight, more importantly can effectively avoid leading to the train longitudinal force transmission inhomogeneous because coupler even hanging device and the high nonconformity of the even hanging center of highway-railway combined transport even hanging device, the technical problem of additional resistance is produced easily to the group of cars horizontal direction, train operation security has been improved, and train operation performance can effectively.

4. By adopting the utility model, the coupling centers of the coupling sections at the two ends of the train unit coupling device are symmetrically arranged about the center of the train unit coupling plate, and the coupling centers at the two ends of the train unit coupling plate are consistent in height, so that the longitudinal force in the height direction is transmitted uniformly, the horizontal direction of the train unit can not generate additional resistance, the transmission of the longitudinal force of the train in the train unit can be ensured, the multiple gradient transfer in the height direction can not occur, the attenuation is small, and the train performance can be obviously improved; meanwhile, the clearance between the vehicles in the train is reduced, the number of vehicle marshalling is increased, and the train operation capacity and the transportation economy are improved; the device can effectively realize the arbitrary bidirectional coupling marshalling of the special bogie in the train set and the highway-railway dual-purpose semitrailer, improve the marshalling speed and facilitate the use and the management of the transport train set.

5. The utility model discloses a transport vehicle group that tip hitch and train unit hitch draw the hitch and constitute, it realizes ingeniously that the direction of the longitudinal force of train group is always along the line of hitch point, and tip hitch and train unit hitch and the hitch point of the dual-purpose semitrailer of public railway are always located same horizontal direction to the design of combining the ball pivot structure the dual-purpose semitrailer frame of public railway has the degree of freedom of shaking head, nodding and rolling laterally relative to the bogie; the design of combining the elastic guide sleeve structure keeps the height of the center of the coupling consistent, the longitudinal force of the vehicle set is transmitted uniformly, no additional bending moment is generated in the height direction, the running performance of the vehicle set can be effectively improved, the snake-shaped motion of the road and railway dual-purpose vehicle set is inhibited, the composition and action principle of the coupling buffer coupling device are completely different from the mode of realizing that the vehicle set pulls the coupling through the vehicle coupler buffer coupling device or the auxiliary connecting device, the economic benefit of an enterprise can be obviously improved, and the coupling buffer coupling device is suitable for popularization and application.

Drawings

The invention will be described by way of example only and with reference to the accompanying drawings, in which

FIG. 1 is a front view of a shortest highway-railway transport vehicle set according to an embodiment of the present invention;

FIG. 2 is a side view of an embodiment of the present invention;

FIG. 3 is an axial view of an articulated bogie according to an embodiment of the present invention;

FIG. 4 is an axial view showing the coupling state of the unit coupling device on the knuckle bogie according to the embodiment of the present invention;

FIG. 5 is a sectional view of the train unit coupling device on the knuckle bogie in the embodiment of the present invention along the longitudinal center of the train unit coupling plate;

FIG. 6 is a horizontal central sectional view of the unit hitch of the knuckle bogie in the embodiment of the present invention along the unit hitch seat;

FIG. 7 is an isometric view of an end bogie in an embodiment of the present invention;

FIG. 8 is an isometric view of the upper end hitch of the end truck in an embodiment of the present invention;

FIG. 9 is a longitudinal center sectional view of the upper end hitch of the end truck of the embodiment of the present invention taken along the end hitch plate;

FIG. 10 is a horizontal center sectional view of the end hitch of the end truck upper end attachment along the end hitch mount in an embodiment of the present invention;

fig. 11 is a flow chart of a marshalling method according to an embodiment of the present invention;

fig. 12 is a schematic flow chart of a grouping method according to another embodiment of the present invention.

Description of reference numerals: 1-a highway and railway semitrailer; 11-a frame; 111-a front end beam; 112-centre sill; 113-a rear end beam; 12-a vehicle axle; 13-a guard; 14-a support means; 15-wheel axle air suspension means; 2-knuckle bogies; 21-knuckle welded frame; 211-knuckle truss stringers; 212-a joint frame ramp; 213-joint frame bearing table; 214-knuckle frame beam; 22-train set coupling device; 221-vehicle assembly hanging plates; 222-vehicle group connecting hanging seats; 223-the train set is connected with a round pin; 224-knuckle truss pin holes; 225-spherical hinge; 226-elastic guide sleeve; 227-a steering interface; 228-side wear plates; 23-fixing the mounting seat; 3-end bogie; 31-end welding of the frame; 311-end truss stringers; 312-end truss ramps; 313-end frame carrier; 314-end frame beams; 32-end coupling means; 321-connecting the end part with a hanging plate; 322-end part connecting with a hanging seat; 323-end connection round pin; 324-end connecting hanging seat pin holes; 33-coupler buffer device.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Example one

One embodiment is substantially as shown in FIG. 1: the embodiment provides a highway-railway dual-purpose transport vehicle set, which comprises at least two highway-railway dual-purpose semitrailers 1, at least one joint bogie 2 and two end part bogies 3, wherein the number of the highway-railway dual-purpose semitrailers 1 is N, the highway-railway dual-purpose semitrailers are sequentially arranged along the advancing direction of the highway-railway dual-purpose semitrailer, the N highway-railway dual-purpose semitrailers 1 are marshalled into a set of railway carrying unit trains through the two end part bogies 3 and the (N-1) middle joint bogie 2, the number N of the highway-railway dual-purpose semitrailers 1 in the transport vehicle set can be increased or decreased according to the situation of the organization of a goods source, the marshalling, the connection, the disassembly and the suspension reduction of the highway-railway dual-purpose semitrailer 1 are convenient and flexible, the requirement of the grouped operation of the goods source railway; in the embodiment, for example, a shortest transport vehicle set is formed by two end bogies 3, a middle joint bogie 2 and two highway-railway semitrailers 1, the joint bogie 2 and the end bogies 3 are both two-shaft welded framework bogies, the joint bogie 2 is positioned between two adjacent highway-railway semitrailers 1, a vehicle set coupling device 22 is arranged on the joint bogie 2, and the joint bogie 2 is respectively connected with the highway-railway semitrailers 1 on two sides of the joint bogie 2 through two ends of the vehicle set coupling device 22 so as to complete coupling of the joint bogie 2 and the two adjacent highway-railway semitrailers 1 on two sides of the joint bogie 2 in the advancing direction; the two end bogies 3 are respectively positioned at two ends of a train set after marshalling is finished, an end coupling device 32 and a coupler buffer device 33 are arranged on the end bogies 3, one end of each end bogie 3 is coupled with the road-rail semitrailer 1 through the end coupling device 32, and the other end of each end bogie is coupled with a railway locomotive or a railway wagon through the coupler buffer device 33.

As shown in fig. 2, the semitrailer 1 for both highway and railway provided by this embodiment includes a frame 11, a vehicle axle 12, a protection device 13, a supporting device 14 and an axle air suspension device 15 with a lifting function, where the frame 11 includes a front end beam 111, a rear end beam 113 and a middle beam 112 connecting the front end beam 111 and the rear end beam 113, so that the frame 11 forms a gooseneck structure with a high front part and a low rear part, and thus the overall structure of the frame 11 has better load bearing capacity; the automobile wheel axle 12, the protection device 13 and the support device 14 are all general fittings of a semitrailer or a railway freight car meeting the relevant national standard, and the specific structures thereof are all the prior art and are not described herein. This implementation provides a take wheel axle air suspension device 15 of raising function is including fixing support, suspension gasbag, the leading arm on frame 11 and setting up the elastic support device on the support, and the one end of leading arm is through being connected with the support rotation, and the other end passes through the lower extreme fixed connection of U type bolt and suspension beam gasbag, and the wheel axle passes through U type bolt fastening at the leading arm middle part. In order to prevent the wheel axle from automatically falling down and contacting with the ground, the elastic supporting device is used for limiting the minimum ground clearance of the falling of the wheel axle, the elastic supporting device and the suspension air bag of the air suspension are used as the power source for adjusting the height of the wheel axle, the wheel axle ground clearance can be automatically adjusted by adjusting the air pressure of the suspension air bag, the free switching operation height of the trailer wheel axle on the road and the railway is realized, the height of the passive lifting wheel axle is released by utilizing the pre-compression force of the elastic supporting device after the suspension air bag is decompressed, the automatic falling risk of the wheel axle is effectively avoided, compared with the existing mode of actively lifting the wheel axle by adopting an air suspension structure provided with an air compression device or a hydraulic device, the automatic lifting device has low structural design cost, even after the air pressure or the hydraulic device leaks, the wheel shaft can not automatically fall down to be contacted with the ground, the running economy is good, and the trailer is ensured to have good running stability, and is extremely suitable for the switching operation of a road and railway transport vehicle set on the road and the railway.

As shown in fig. 3 to 6, the knuckle bogie 2 provided in this embodiment includes a knuckle welding frame 21 having two ends symmetrically disposed about a center, and a train unit hitch 22 fixed to a middle portion of the knuckle welding frame 21; specifically, the joint welding truss 21 comprises a joint truss longitudinal beam 211 and a joint truss cross beam 214 symmetrically arranged about the center of the joint truss longitudinal beam, joint truss slopes 212 and a joint truss bearing platform 213 are symmetrically arranged at two ends of the joint truss longitudinal beam 211, and the joint truss slopes 212 at two sides are both inclined downwards along one side close to the highway-railway dual-purpose semitrailer 1 in the middle of the joint welding truss 21; the joint frame bearing platform 213 is located at the top end of the joint frame longitudinal beam 211 close to the joint frame slope 212, and the joint frame bearing platform 213 is a horizontally arranged plane structure for bearing the vertical load of the highway-railway semitrailer 1.

In order to simplify the internal traction coupling structure of the combined transport train for highway and railway and reduce the gap between the vehicles in the train, the train set coupling device 22 provided by the embodiment comprises a train set coupling hanging plate 221, a train set coupling hanging seat 222 and a train set connecting round pin 223, the middle part of the train set coupling hanging plate 221 is fixedly connected with the joint welding framework 21, the extending direction of the train set coupling hanging plate 221 is the same as the extending direction of the joint framework longitudinal beam 211 and is the advancing direction of the train, both ends of the train set coupling hanging plate 221 are provided with train set coupling sections, and the train set coupling hanging seat 222 is arranged in the front end beam 111 or the rear end beam 113 of the semitrailer 1 for highway and railway; the train set connecting sections at two ends of the train set connecting and hanging plate 221 are respectively inserted into train set connecting and hanging seats 222 in the end beams of the highway-railway dual-purpose semitrailer 1 at two sides in the advancing direction, and respectively penetrate through the train set connecting and hanging plate 221 and train set connecting and hanging seat pin holes 224 on the corresponding train set connecting and hanging seats 222 from bottom to top through train set connecting round pins 223, so that the joint bogie 2 is connected with two adjacent highway-railway dual-purpose semitrailers 1 at two sides in the advancing direction; the coupling of the dual-purpose semitrailer 1 for both roads and railways in the dual-purpose transport vehicle set for roads and railways is completed in the same way; therefore, the internal traction coupling structure of the train set of the rail-road transport vehicle can be effectively simplified, the gaps among the vehicles in the train can be reduced, the coupling marshalling of any two directions of the knuckle bogie and the rail-road semitrailer 1 can be effectively realized, the number of the vehicle marshalling can be increased, the invalid dead weight of the transport vehicle set can be effectively reduced, and the transportation economy of the train set can be improved; in addition, the train unit coupling sections arranged at two ends of the same train unit coupling hanging plate 221 are connected with the train unit coupling hanging seats 222 in the end beams of the combined semitrailer 1 for the public and railway at two sides of the advancing direction of the same train unit coupling hanging plate, so that the rapid marshalling and coupling between the combined semitrailer 1 for the public and railway is realized, the existing mode that the traditional railway wagon train coupler coupling hanging device or auxiliary connecting device needs to be adopted for marshalling and coupling inside a transport train unit is cancelled, the technical problem that the transport train unit is invalid and heavy in dead weight due to the complex marshalling and coupling structure inside the transport train unit can be effectively avoided, the technical problem that the longitudinal force of a train is transmitted unevenly due to the fact that the coupling device and the coupling center of the combined transportation and coupling device are inconsistent can be effectively avoided, the train operation safety is improved, and.

Example two

The second embodiment is substantially the same as the first embodiment, except that: as a preferred option of the first embodiment, the train set connection hanging plate 221 provided in this embodiment is specifically a dumbbell-shaped symmetric flat plate structure, wherein the middle portion of the train set connection hanging plate 221 is provided with the fixed mounting base 23, and the train set connection hanging plate 221 is fixed on the knuckle bogie 2 framework through the fixed mounting base 23, so as to ensure the stability of the center support of the connection hanging at the two ends of the train set connection hanging plate 221; mounting holes are formed in the train set connection sections at two ends of the train set connection hanging plate 221; and the upper end surface and the lower end surface of the train set connecting and hanging seat 222 are provided with a train set connecting round pin 223 hole corresponding to a mounting hole at the end part of the train set connecting and hanging plate 221, so that train set connecting and hanging sections at two ends of the train set connecting and hanging plate 221 are respectively inserted into the train set connecting and hanging seat 222 in the end beam of the combined semitrailer 1 at two sides of the advancing direction of the train set connecting and hanging section, and respectively penetrate through the train set connecting round pin 223 hole on the train set connecting and hanging seat 222 and the mounting hole on the corresponding train set connecting and hanging plate 221 through the train set connecting round pin 223, so as to complete the connection and hanging of the knuckle bogie 2 and two adjacent combined semitrailers 1 at two sides of the advancing direction; meanwhile, the spherical hinges 225 are embedded in the mounting holes at the two ends of the train set connection hanging plate 221, when in connection, the spherical hinges 225 are positioned between the train set connection round pin 223 and the train set connection hanging section mounting holes, specifically, the spherical hinges 225 comprise a spherical core and two outer spherical sleeves, the middle part of the spherical core is provided with a pin hole for the train set connection round pin 223 to pass through, the upper end surface and the lower end surface of the two outer spherical sleeves are respectively provided with a shoulder, a gap is arranged between the spherical core and the outer spherical sleeves, so that the spherical core has swinging freedom and limited side rolling and nodding freedom relative to the outer spherical sleeves, therefore, the design of the spherical hinge 225 enables the frame 11 of the rail-road semi-trailer 1 to be a two-force rod structure, and the design structure of the train set connection hanging plate 221 is combined, the direction of the longitudinal force of the train set is skillfully realized to be always along the connection line of the connection hanging points, and the connection hanging centers of the train set connection hanging sections at the two ends of the train set connection hanging plate 221 are symmetrically, and the height of the coupling centers at the two ends of the train set coupling hanging plate 221 is the same, the train set coupling seats 222 at the two ends are positioned on the same horizontal plane, the train set connecting round pin 223 only bears shearing force but not bending moment, the height of the coupling centers at the two ends of the coupling device is kept consistent, the longitudinal force in the height direction is transmitted uniformly, the horizontal direction of the train set cannot generate additional resistance, the uniform height direction of the longitudinal force transmission of the train set cannot generate additional bending moment, and the running performance of the transport train set can be effectively improved.

Meanwhile, the two ends of the joint welding framework 21 are respectively provided with an elastic guide sleeve 226, and a vehicle set connecting round pin 223 sequentially penetrates through the elastic guide sleeves 226, the vehicle set connecting hanging plate 221 and the vehicle set connecting hanging seat 222 from bottom to top to complete the connection and hanging of the joint bogie 2 and two adjacent road-railway dual-purpose semitrailers 1 on the two sides of the joint bogie in the advancing direction; specifically, the elastic guide sleeve 226 comprises a middle elastic body and inner and outer steel sleeves, mounting holes for mounting the elastic guide sleeve 226 are formed in two ends of the knuckle welding framework 21, the elastic guide sleeve 226 is used for restraining the round car group connecting pin 223 from only vertically moving relative to the knuckle welding framework 21 when moving up and down, and when the round car group connecting pin 223 and the ball core are connected with the car group hanging seat 222 together and are nodded and rolled relative to the car group connecting hanging plate 221, the round car group connecting pin 223 can freely move around the ball core.

The middle part of the train set connection hanging plate 221, which is close to the fixed mounting seat 23, is waist-shaped, the train set connection hanging sections at the two ends of the train set connection hanging plate 221 both have a wedge-shaped horizontal direction guide outline and a wedge-shaped vertical direction guide outline, the horizontal direction guide outline comprises a middle minor arc section and break line sections respectively connected with the two ends of the middle minor arc section, and the bending point of the break line section connected with the minor arc section is a stress shoulder; the vertical direction guiding outline comprises a middle straight line section and a broken line section connected with two ends of the middle straight line section, so that the vertical section of the vertical section is in a simulated V shape, a chamfer is arranged at the cross section of a stress shoulder of the train set connection hanging plate 221, so that the train set connection hanging seat 222 has side rolling freedom relative to a mounting hole on the train set connection hanging plate 221, the unevenness and the relaxation curve superelevation of a railway running line are adapted, and the requirement of railway working condition safe running of a highway-railway dual-purpose transport train set is met.

Furthermore, the wedge-shaped horizontal direction guide profiles and the vertical direction guide profiles at the two ends of the train set connection hanging plate 221 provided by the embodiment are symmetrically arranged around the center of the train set connection hanging plate 221, so that the train set connection hanging plate 221 integrally forms a dumbbell-shaped symmetrical structure, the longitudinal force of a train is further ensured to be uniformly transmitted, no additional bending moment is generated in the height direction of the train, and meanwhile, the head nodding, head shaking and side rolling freedom requirements of the railway wagon during operation are met by combining the profiles of the train set connection hanging sections at the two ends of the train set connection hanging plate 221 and the design of the spherical hinge 225 in the mounting hole, so that the requirements of the railway wagon on the unevenness of the railway line and the ultrahigh relaxation curve during operation are met, and the requirement of the railway working condition safety operation of the railway; and the quick marshalling and coupling are realized, the gaps among the vehicles in the train are reduced, and the snake-shaped movement of the highway-railway dual-purpose transport vehicle set can be effectively inhibited.

The train unit connecting and hanging seat 222 provided by this embodiment has a guide interface 227 adapted to a train unit connecting and hanging section of the train unit connecting and hanging plate 221, an open end of the guide interface 227 is designed to be a wedge-shaped guide profile, and the horizontal section of the guide interface 227 is in a V shape, and the left and right side walls in the insertion direction of the train set connection section in the guide interface 227 are symmetrically provided with side wear plates 228, the force bearing shoulders at the two sides of the train set connection hanging section 221 connection hanging section are contacted with the side wear plates 228, the mounting holes at the two ends of the train set connection hanging plate 221 are respectively arranged coaxially with the train set connection round pin 223 hole on the corresponding train set connection hanging seat 222, and the guide interface 227 has a gap with the upper end surface and the lower end surface of the inserted train unit connecting section, so that the train set connection hanging seat 222 has a nodding degree of freedom relative to the mounting hole of the train set connection hanging plate 221, the method is suitable for the unevenness of railway running lines and the super high gentle curve, and meets the requirement of safe running of railway working conditions of a highway and railway dual-purpose transport vehicle set; specifically, the guide interface 227 is embedded in the end beam of the highway and railway dual-purpose frame 11, and the horizontal cross section of the guide interface forms a concave shape similar to a V shape, so that the side wear plates 228 on the two sides can play a reliable guide connection role in the connection and hanging section of the train set connection hanging plate 221; the side abrasion plate 228 is provided with a tenon bolt in a sunk manner and is connected with the inner side wall of the guide connecting port, so that the connection is reliable, the disassembly, the maintenance and the replacement are convenient, and the limit stability is ensured; compared with the existing traction coupling structure, the coupling mode of the embodiment can effectively avoid the additional increase of invalid weight, ensure the stability of railway transportation of the highway and railway dual-purpose wagon, and further greatly improve the economy of railway transportation.

EXAMPLE III

The third embodiment is substantially the same as the second embodiment, except that: referring to fig. 7 to 10, the end bogie 3 provided in this embodiment includes an end welding frame 31, specifically, the end coupling device 32 includes an end coupling plate 321, an end coupling seat 322, and an end coupling round pin 323, the end coupling plate 321 includes a fixed segment and an end coupling segment, the end coupling plate 321 is connected to the end welding frame 31 through the fixed segment, the end coupling seat 322 is located in the front end beam 111 at the end of the transportation vehicle group semi-trailer 1 for railroad and railroad, one end of the end bogie 3 is inserted into the end coupling seat 322 through the end coupling segment, and passes through an end coupling seat pin hole 324 on the end coupling plate 321 and the end coupling seat 322 from bottom to top through the end coupling round pin 323, so as to complete coupling of the end bogie 3 and the semi-trailer for railroad and railroad; the other end of the end bogie 3 is fitted with a coupler draft gear 33.

Further, the end welding frame 31 includes an end frame longitudinal beam 311 and four end frame cross beams 314 distributed along the length direction of the end frame longitudinal beam 311, the four end frame cross beams 314 are all vertically connected with the end frame longitudinal beam 311, the end frame cross beams 314 on two sides of the end frame longitudinal beam 311 are symmetrically arranged with respect to the end frame longitudinal beam 311, one end of the end frame longitudinal beam 311 is provided with an end frame slope 312 and an end frame bearing platform 313, the end frame slope 312 is inclined downwards from the middle of the end welding frame 31 along one side close to the highway-railway semitrailer, the end frame bearing platform 313 is located at the top end of the end frame longitudinal beam 311 close to the end frame slope 312, and the end frame bearing platform 313 is a plane structure for bearing the vertical load of the highway-railway semitrailer 1; the coupling position of the end coupling device 32 and the highway-railway dual-purpose semitrailer 1 is positioned at the middle point of two shafts of the end bogie 31; the coupler draft gear 33 is mounted on the end of the end frame longitudinal beam 311 remote from the semi-trailer 1 for highway and railway.

In order to realize quick coupling between the end bogie 3 and the railroad semi-trailer 1, the end connection section contour of the end connection hanging plate 321 provided in this embodiment is the same as the contour structure of the train unit coupling sections at both ends of the train unit connection hanging plate 221 in the train unit coupling device 22, and the end connection hanging seat 322 and the end connection round pin 323 in the end connection hanging device 32 are the same as the structure of the train unit connection hanging seat 222 and the train unit connection round pin 223 in the train unit coupling device 22 and the coupling mode principle thereof, so the details are not described.

In conclusion, the rapid marshalling and coupling between the semitrailer 1 for both highway and railway and a railway locomotive or a railway wagon can be realized, so that a train set can operate in a single train and also can operate in a marshalling manner with the railway wagon, and the railway train organization is facilitated; the rail-road semitrailer can effectively realize the two-way quick coupling marshalling of the rail-road semitrailer 1, meet the marshalling requirements of any two-way articulated bogie 2 and the rail-road semitrailer 1, and the rail-road semitrailer 1 can directly run on the road after being unpacked, thereby solving the problems of 'the first kilometer' and 'the last kilometer' in railway freight transportation, realizing 'door-to-door' transportation with one vehicle at the bottom and complete loading and unloading, reducing the times of dumping freight and improving the comprehensive transportation benefit.

Example four

On the other hand, as shown in fig. 11, the present embodiment further provides a marshalling method for a train and highway dual-purpose transport vehicle group, which includes the following steps:

1) placing an end bogie which is arranged at the tail part of the marshalling unit on a straight track of the marshalling yard by using an operation vehicle;

2) the method comprises the following steps that after a first highway-railway dual-purpose semitrailer is pulled to a flat track of a marshalling yard to be centered by a highway tractor, landing legs of the first highway-railway dual-purpose semitrailer are put down to be supported on the ground, the highway tractor and the first highway-railway dual-purpose semitrailer are unhooked and pulled out, and the highway tractor is withdrawn;

3) pushing an end part bogie positioned at the tail part of the train set into the lower plane of the front end part of the frame of the first highway-railway dual-purpose semitrailer by using an operation vehicle, penetrating an end part connecting round pin, and connecting an end part connecting device positioned on the end part bogie at the tail part of the train set with an end part connecting seat at the front end of the first highway-railway dual-purpose semitrailer so as to finish connecting and hanging the end part bogie positioned at the tail part of the train set with the first highway-railway dual-purpose semitrailer;

4) placing a first knuckle bogie on a tail track of a first highway-railway dual-purpose semitrailer by using an operation vehicle, centering, and towing a second highway-railway dual-purpose semitrailer by using a highway tractor to back up to one side of the first knuckle bogie, which is far away from the first highway-railway dual-purpose semitrailer;

5) a road tractor is used for towing a second highway-railway dual-purpose semitrailer to continue backing up, climbing along the slope at the left end of the joint welding framework of the first joint bogie, and pushing the first joint bogie to move along the direction of the first highway-railway dual-purpose semitrailer; until the rear end of a train set connecting and hanging plate of a first knuckle bogie train set connecting and hanging device is pushed to be inserted into a train set connecting and hanging seat at the tail part of a first combined semitrailer frame, the front end of the train set connecting and hanging plate is inserted into a train set connecting and hanging seat at the tail part of a second combined semitrailer frame, and train set connecting round pins respectively penetrate through the train set connecting and hanging plate and the corresponding train set connecting and hanging seat from bottom to top to complete the connecting and hanging marshalling of the first bogie and a first combined semitrailer and a second combined semitrailer at two sides of the first combined semitrailer and the second combined semitrailer in the advancing direction of the first bogie;

6) putting down the landing legs of the second highway and railway dual-purpose semitrailer for landing and supporting, using the highway tractor and the second highway and railway dual-purpose semitrailer to unhook and pull out, and withdrawing the highway tractor again;

7) pushing an end part bogie which is woven into the head of the train set into the lower plane of the front end part of the frame of the second highway-railway dual-purpose semitrailer by using an operation vehicle, penetrating an end part connecting round pin, and carrying out coupling marshalling on an end part coupling device of the end part bogie positioned at the head of the train set and an end part coupling seat at the front end of the second highway-railway dual-purpose semitrailer to finish marshalling of the end part bogie positioned at the head of the train set and the second highway-railway dual-purpose semitrailer;

8) the locomotive is connected with a hook buffer device of an end bogie positioned at the head of the locomotive group, so that the locomotive group of two end bogies, one middle joint bogie and two highway-railway semitrailers is marshalled.

EXAMPLE five

The fifth embodiment is substantially the same as the fourth embodiment except that: as shown in fig. 12, the present embodiment provides a marshalling method for two end bogies, two middle joint bogies, and three highway-railway dual-purpose semi-trailer train sets, which includes the following steps:

1) placing an end bogie which is arranged at the tail part of the marshalling unit on a straight track of the marshalling yard by using an operation vehicle;

2) the method comprises the following steps that after a first highway-railway dual-purpose semitrailer is pulled to a flat track of a marshalling yard to be centered by a highway tractor, landing legs of the first highway-railway dual-purpose semitrailer are put down to be supported on the ground, the highway tractor and the first highway-railway dual-purpose semitrailer are unhooked and pulled out, and the highway tractor is withdrawn;

3) pushing an end part bogie positioned at the tail part of the train set into the lower plane of the front end part of the frame of the first highway-railway dual-purpose semitrailer by using an operation vehicle, penetrating an end part connecting round pin, and connecting an end part connecting device positioned on the end part bogie at the tail part of the train set with an end part connecting seat at the front end of the first highway-railway dual-purpose semitrailer so as to finish connecting and hanging the end part bogie positioned at the tail part of the train set with the first highway-railway dual-purpose semitrailer;

4) placing the first knuckle bogie on a tail track of the first highway-railway dual-purpose semitrailer by using an operation vehicle, centering the first knuckle bogie, and using a highway tractor to pull the second highway-railway dual-purpose semitrailer to back up to one side of the first knuckle bogie, which is far away from the first highway-railway dual-purpose semitrailer;

5) the highway tractor pulls the second highway-railway dual-purpose semitrailer to continue backing up, a climbing slope is formed at the left end of the joint welding framework along the first joint bogie, and the first joint bogie is pushed to move along the first highway-railway dual-purpose semitrailer; until the rear end of a train set connecting and hanging plate of a first knuckle bogie train set connecting and hanging device is pushed to be inserted into a train set connecting and hanging seat at the end part of a first train and railway dual-purpose semitrailer frame, the front end of the train set connecting and hanging plate is inserted into a train set connecting and hanging seat at the tail part of a second train and railway dual-purpose semitrailer frame, and train set connecting round pins respectively penetrate through the train set connecting and hanging plate and the corresponding train set connecting and hanging seat from bottom to top to complete the connecting and hanging marshalling of the first knuckle bogie and a first train and railway dual-purpose semitrailer and a second train and railway dual-purpose semitrailer at two sides of the first knuckle bogie and the advancing direction of the first;

6) putting down the landing legs of the second highway and railway dual-purpose semitrailer for landing and supporting, using the highway tractor and the second highway and railway dual-purpose semitrailer to unhook and pull out, and withdrawing the highway tractor again;

and so on, repeating the steps 4) to 6) as shown in fig. 12:

placing a second knuckle bogie on a track in front of a second highway-railway dual-purpose semitrailer by using an operation vehicle and centering the second knuckle bogie, and pulling a third highway-railway dual-purpose semitrailer to back up to one side, away from the second highway-railway dual-purpose semitrailer, of the second knuckle bogie by using a highway tractor;

a road tractor is used for dragging a third highway-railway dual-purpose semitrailer to continue backing up, climbing along the slope at the left end of the joint welding framework of the second joint bogie, and pushing the second joint bogie to move along the direction of the second highway-railway dual-purpose semitrailer; until the rear end of a train set connecting and hanging plate of a second knuckle bogie train set connecting and hanging device is pushed to be inserted into a train set connecting and hanging seat at the tail part of a second combined semitrailer frame, the front end of the train set connecting and hanging plate is inserted into a train set connecting and hanging seat at the tail part of a third combined semitrailer frame, and a train set connecting round pin respectively penetrates through the train set connecting and hanging plate and the corresponding train set connecting and hanging seat from bottom to top to complete the connecting and hanging marshalling of a second knuckle bogie and a second combined semitrailer and a third combined semitrailer at two sides of the second combined semitrailer and the third combined semitrailer in the advancing direction of the second knuckle bogie;

putting down the landing legs of the third highway-railway dual-purpose semitrailer for landing and supporting, using the highway tractor and the third highway-railway dual-purpose semitrailer to unhook and pull out, and withdrawing the highway tractor again;

7) pushing an end part bogie which is woven into the head of the train set into a lower plane of the front end part of the frame of the third highway-railway dual-purpose semitrailer by using an operation vehicle, penetrating an end part connecting round pin, and carrying out coupling marshalling on an end part coupling device of the end part bogie positioned at the head of the train set and an end part coupling seat at the front end of the third highway-railway dual-purpose semitrailer to finish marshalling of the end part bogie positioned at the head of the train set and the third highway-railway dual-purpose semitrailer;

8) the locomotive is connected with a hook buffer device of an end bogie positioned at the tail part of the locomotive group, so that the locomotive group marshalling of two end bogies, two middle joint bogies and three highway-railway dual-purpose semitrailers is completed.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a highway-railway dual-purpose transport vechicle group which characterized in that: comprises that

The highway-railway semitrailers are sequentially arranged along the advancing direction of the highway-railway semitrailer;

each joint bogie is positioned between two adjacent highway-railway dual-purpose semitrailers, and a train set coupling device is arranged on each joint bogie, and each joint bogie is respectively connected with the highway-railway dual-purpose semitrailers on two sides of the train set coupling device through two ends of the train set coupling device so as to complete coupling of the joint bogie and the two adjacent highway-railway dual-purpose semitrailers on two sides of the joint bogie in the advancing direction;

the two end part bogies are respectively positioned at two ends of a train set, an end part coupling device and a coupler buffer device are arranged on the end part bogies, one end of each end part bogie is coupled with a road-rail dual-purpose semitrailer through the end part coupling device, and the other end of each end part bogie is coupled with a railway locomotive or a railway wagon through the coupler buffer device.

2. The combination for road and rail transport as set forth in claim 1, wherein: the joint bogie is a two-shaft welding framework type bogie, the joint bogie comprises a joint welding framework, two ends of the joint welding framework are symmetrically arranged about the center, the train set coupling device comprises a train set coupling hanging plate, a train set coupling seat and a train set connecting round pin, the middle of the train set coupling hanging plate is connected with the joint welding framework, two ends of the train set coupling hanging plate are provided with train set coupling sections, and the train set coupling hanging seat is arranged in an end beam of a highway-railway dual-purpose semitrailer; the train set coupling sections at two ends of the train set coupling plate are respectively inserted into train set coupling seats in the end beams of the highway-railway dual-purpose semitrailer at two sides of the traveling direction of the train set coupling sections, and respectively penetrate through the train set coupling plate and corresponding train set coupling seat pin holes from bottom to top through the train set connecting round pins so as to finish coupling of the knuckle bogie and two adjacent highway-railway dual-purpose semitrailers at two sides of the traveling direction of the knuckle bogie.

3. The combination for road and rail transport as defined in claim 2, wherein: the joint welding truss comprises a joint truss longitudinal beam and a joint truss cross beam symmetrically arranged about the center of the joint truss longitudinal beam, joint truss slopes and joint truss bearing platforms are symmetrically arranged at two ends of the joint truss longitudinal beam, and the joint truss slopes are inclined downwards from the middle part of the joint welding truss along one side close to the highway-railway dual-purpose semitrailer; the joint frame bearing platform is located on the top end, close to the joint frame slope, of the joint frame longitudinal beam, and the joint frame bearing platform is of a horizontally arranged plane structure and is used for bearing vertical loads of the highway-railway dual-purpose semitrailer.

4. The combination for road and rail transport as set forth in claim 3, wherein: the slope of the joint frame of the joint welding frame has two-stage slopes, and the slope of the lower portion of the joint frame is larger than that of the upper portion of the joint frame, so that when the joint bogie is pushed into the lower plane of the end beam of the dual-purpose semitrailer for highway and railway through the slope of the joint frame to be connected and hung, the frame of the dual-purpose semitrailer for highway and railway can be automatically lifted to be separated from a rail.

5. The combination for road and rail transport as defined in claim 2, wherein: the train set connecting and hanging plate is of a dumbbell-shaped symmetrical flat plate structure, a fixed mounting seat is arranged in the middle of the train set connecting and hanging plate, and the train set connecting and hanging plate is fixed on the joint welding framework through the fixed mounting seat; and the coupling centers of the train unit coupling sections at the two ends of the train unit coupling plate are symmetrically arranged around the center of the train unit coupling plate, the heights of the coupling centers at the two ends of the train unit coupling plate are the same, and the train unit coupling seats at the two ends are positioned on the same horizontal plane, so that additional bending moment is not generated in the high direction in the advancing process of the train unit of the highway-railway dual-purpose transport vehicle.

6. The combination for road and rail transport as set forth in claim 1, wherein: the end part bogie is a two-axle welding framework type bogie, the end part bogie comprises an end part welding framework, an end part coupling device and a traditional railway wagon coupler buffering device, the end part coupling device comprises an end part coupling plate, an end part coupling seat and an end part connecting round pin, the end part coupling plate comprises a fixed section and an end part coupling section, the end part coupling plate is connected with the end part welding framework through the fixed section, the end part coupling seat is positioned in an end beam at the end part of the semitrailer for both public and railway, one end of the end part bogie is inserted into the end part coupling seat through the end part coupling section and penetrates through the end part coupling plate and an end part coupling seat pin hole from bottom to top through the end part connecting round pin so as to finish coupling of the end part bogie and the semitrailer for both public and railway; and a car coupler buffer device is arranged at the other end of the end part bogie.

7. The combination for road and rail transport as set forth in claim 6, wherein: the end part welding frame comprises an end part frame longitudinal beam and four sections of end part frame cross beams distributed along the length direction of the end part frame longitudinal beam, the four sections of end part frame cross beams are vertically connected with the end part frame longitudinal beam, the end part frame cross beams on two sides of the end part frame longitudinal beam are symmetrically arranged relative to the end part frame longitudinal beam, an end part frame slope and an end part frame bearing platform are arranged on the end part frame longitudinal beam, the end part frame slope inclines downwards from the middle part of the end part welding frame along one side close to the highway-railway dual-purpose semitrailer, the end part frame bearing platform is located at the top end of the end part frame longitudinal beam close to the end part frame slope, and the end part frame bearing platform is of a plane; the coupling position of the end coupling device and the road-railway dual-purpose semitrailer is positioned at the middle point of two shafts of the end bogie; and the car coupler buffer device is arranged at one end of the end part framework longitudinal beam, which is far away from the semitrailer for both highway and railway.

8. The combination for road and rail transport as set forth in claim 7, wherein: the end part framework slope has two-stage slopes, and its lower part slope is greater than the upper portion slope to when making the tip bogie push the dual-purpose semitrailer end beam lower plane of highway and railway through the end part framework slope and couple, the frame of dual-purpose semitrailer of highway and railway can rise in order to break away from the rail automatically.

9. The combination for road and rail transport as set forth in claim 7, wherein: the center of the end part coupling device is higher than the center of the car coupler buffering device, the gravity center of the end part bogie is arranged at the coupling center of the end part coupling device and the combined car of the rail-road vehicle and close to one side of the car coupler buffering device, and the end part framework bearing platform is arranged at the other side of the end part bogie.

10. An amphibious transport vehicle set as claimed in any one of claims 1 to 9, characterised in that: the highway-railway semitrailer comprises a frame, an automobile wheel shaft, a protective device, a supporting device and a wheel shaft air suspension device with a lifting function, wherein the frame comprises a front end beam, a rear end beam and a middle beam connected with the front end beam and the rear end beam, so that the frame forms a gooseneck structure with a high front part and a low rear part.

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