CN114162159B

CN114162159B - Door shield assembly and railway container flatcar

Info

Publication number: CN114162159B
Application number: CN202111313888.0A
Authority: CN
Inventors: 李晓军; 陈伟; 刘凤伟; 汤楚强; 史春江; 姜瑞金; 徐勇
Original assignee: CRRC Changzhou Co Ltd; Technology Development Branch of CRRC Yangtze Transportation Equipment Group Co Ltd
Current assignee: CRRC Changzhou Co Ltd; Technology Development Branch of CRRC Yangtze Transportation Equipment Group Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2023-05-16
Anticipated expiration: 2041-11-08
Also published as: AU2022380815A1; WO2023078087A1; CL2024000089A1; CN114162159A

Abstract

The application relates to a door stop assembly and a railway container flatcar. The door shield assembly is arranged on the underframe of the railway container flatcar, the door shield assembly comprises a second door shield arranged in the middle of the underframe, the second door shield comprises a first turnover baffle plate, the first baffle plate is rotatably connected to the top surface of the underframe, the first baffle plate is vertically arranged on the underframe in an operation mode, and when the first baffle plate is in a vertical state, the first baffle plate is arranged along a second direction; the second direction is the width direction of the chassis. The second door shield of application can not open the hole on the floor and realize preventing the unexpected purpose of opening of collection dress end door, can not reduce the structural strength of vehicle, and simple structure uses convenient operation.

Description

Door shield assembly and railway container flatcar

Technical Field

The application belongs to the technical field of railway wagons, and particularly relates to a door shield assembly and a railway container flatcar.

Background

Railway container flatcars are special purpose vehicles for railway shipping containers.

In the prior art, container door stops are usually arranged at the end and side surfaces of a vehicle because of the anti-theft requirement or the prevention of the container end door or the side door from being opened accidentally. For an ultralong container flatcar that ships 3 or 4 20 foot containers, a movable door stop can also be provided between the two containers for blocking the container end doors for use when the container is mounted in the middle of the vehicle and the two ends are empty.

In the prior art, the movable door shield arranged between two containers is generally complex in structure, and in order not to influence the loading of the containers in a non-working state, the movable door shield needs to be turned to an area below the floor surface, so that holes are formed in the floor, the structural strength of the vehicle is reduced, and the movable door shield is inconvenient to operate in use.

Disclosure of Invention

For solving above-mentioned technical problem, this application provides a door shield subassembly and railway container flatcar, aims at solving among the prior art to a certain extent at least and sets up the structural strength who reduces the vehicle that the movable door shield brought between two containers, and the inconvenient technical problem of operation during the use.

The technical scheme of the application is as follows:

in one aspect, the present application provides a door stop assembly, characterized in that, the door stop assembly is installed on the chassis of a railway container flatcar, the door stop assembly includes:

a second door stop disposed in a middle portion of the chassis, the second door stop including a reversible first baffle rotatably coupled to a top surface of the chassis, the first baffle being operatively upstanding from the chassis, the first baffle being disposed in a second direction when the first baffle is in an upstanding state;

the second direction is a width direction of the chassis.

In some embodiments, the second door stop further comprises:

the two fixing sleeves are fixedly arranged on the underframe at intervals along the second direction;

the movable sleeve is movably arranged between the two fixed sleeves, the movable sleeve is fixedly arranged on the inner side of the first baffle, a first jack and a second jack are arranged on the peripheral surface of the movable sleeve, the first jack and the second jack are sequentially arranged along a second direction, an included angle is formed between radial planes of the movable sleeve where the central lines of the first jack and the second jack are positioned, and one ends of the first jack and the second jack which are opposite are communicated;

the pull rod sequentially penetrates through one fixed sleeve, the movable sleeve and the other fixed sleeve, a stop is arranged on the peripheral surface of the pull rod, and the stop can operate to move in the first jack and the second jack.

As the preferred scheme of this application, two fixed sleeve's relative one end all is provided with first limiting plate, movable sleeve's both ends are provided with the second limiting plate respectively, two the second limiting plate is operatively with two first limiting plate butt joint.

In some embodiments, the two ends of the pull rod are respectively provided with a limiting rod, and the two limiting rods and the pull rod form a U shape.

In some embodiments, the inner side of the first baffle is provided with a relief groove at a position corresponding to the stop.

In some embodiments, the second door stop is provided in a plurality at intervals along a first direction in a middle portion of the chassis, the first direction being a length direction of the chassis.

In some embodiments, the door stop assembly further comprises a first door stop disposed at both ends of the chassis in a first direction, the first direction being a length direction of the chassis.

In some embodiments, the first door stop further comprises a strap fixedly disposed on the bottom outer side of the first support plate, the strap fixedly disposed on the chassis.

In some embodiments, a plurality of first stiffeners are also provided in spaced relation between the outer side of the first support plate and the strap.

On the other hand, the application also provides a railway container flatcar, which is characterized by comprising a bottom frame, wherein the bottom frame is provided with the door stop assembly.

The beneficial effects of this application include at least:

the application provides a railway container flatcar, because the second door of this flatcar keeps off the middle part that sets up at the chassis, the second door keeps off including the first baffle that can overturn, first baffle rotationally connects on the top surface of chassis, first baffle is operable to erect on the chassis, when first baffle is in the state of standing, first baffle sets up along the second direction, the second door keeps off and is in the state of standing under operating condition promptly, in order to prevent that container end door is unexpected to be opened, the second door keeps off under non-operating condition, first baffle upset to the horizontality, just so can not influence container loading. The application the second door stop can not open the hole on the floor and realize preventing the unexpected purpose of opening of collection dress end door, can not reduce the structural strength of vehicle, and simple structure uses convenient operation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a railway container flatcar according to an embodiment of the present application;

FIG. 2 is a schematic view of the first door stop of FIG. 1;

FIG. 3 is a schematic view of the second door stop of FIG. 1;

FIG. 4 is a schematic diagram of the explosive structure of FIG. 3;

FIG. 5 is a schematic view of the second door stop shown in FIG. 3;

FIG. 6 is a schematic view of the second door stop of FIG. 3 in a non-operational position;

FIG. 7 is a schematic view of the second door stop of FIG. 3 in an operative position;

FIG. 8 is a schematic view of the first gear of FIG. 1;

FIG. 9 is a schematic view of the structure of FIG. 8 from another perspective;

FIG. 10 is a schematic view of the second gear of FIG. 1;

FIG. 11 is an exploded view of FIG. 10;

FIG. 12 is a schematic view of the second gear shown in FIG. 10 in a non-operative position;

FIG. 13 is a schematic view of a second gear under different conditions;

in the accompanying drawings:

1-chassis, 2-first door stop, 201-first support plate, 202-lap plate, 203-first reinforcement, 3-second door stop, 301-first baffle, 302-fixed sleeve, 303-movable sleeve, 304-tie rod, 305-first jack, 306-second jack, 307-stop, 308-stop lever, 309-first stop plate, 310-second stop plate, 311-back-out slot, 4-first box stop, 401-second baffle, 402-third baffle, 403-first floor, 404-first shroud, 405-second reinforcement, 5-second box stop, 501-second support plate, 502-fourth baffle, 503-second floor, 504-second shroud, 505-stiffener plate, 506-rotating shaft, 6-brake, 7-bogie, 8-coupler buffer.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:

the embodiment of the application provides a railway container flatcar, aims at solving the technical problems that a movable door shield arranged between two containers and a container is complex in mechanism, inconvenient to operate, long in manufacturing period and high in manufacturing cost due to the fact that a lock head is adopted for fixing the containers in the prior art to at least a certain extent.

Fig. 1 is a schematic structural diagram of a railway container flatcar according to an embodiment of the present application, and in combination with fig. 1, the flatcar according to an embodiment of the present application includes a chassis 1, a first door stop 2, a second door stop 3, a first box stop 4, and a second box stop 5, where the first door stop 2 and the second door stop 3 form a door stop assembly, and the first box stop 4 and the second box stop 5 form a box stop assembly.

For convenience of description, the first direction in the embodiment of the present application is the length direction of the chassis 1, and the second direction in the embodiment of the present application is the width direction of the chassis 1.

Referring to fig. 1, in this embodiment of the present application, a braking device 6 is disposed on a chassis 1, the chassis 1 is supported by a bogie 7, and a coupler buffer device 8 is disposed at an end of the chassis 1, which is a prior art, and this embodiment of the present application will not be described in detail.

Fig. 2 is a schematic view of the first door stop in fig. 1. Referring to fig. 2, two ends of the chassis 1 in the first direction of the embodiment of the present application are respectively provided with a first door stop 2, the first door stop 2 includes a first support plate 201, the first support plate 202 is vertically and fixedly disposed on the chassis 1, and the first support plate 201 is disposed along the second direction.

The first support plate 201 of the first door stop 2 according to the embodiment of the present application is always in an upright state, and the first door stop 2 provided at the end of the bottom frame 1 can prevent the end door of the container from being accidentally opened when the vehicle is fully loaded with the container.

Referring to fig. 2, the first door stop 2 according to the embodiment of the present application further includes a strap 202, where the strap 202 is fixedly disposed on the bottom outer side of the first support plate 201, and the strap 202 may be fixedly disposed on the chassis 1 by welding or bolting, so as to implement the installation of the first door stop 2 on the chassis 1.

Further, a plurality of first reinforcing members 203 are further provided at intervals between the outer side of the first supporting plate 201 and the lap plate 202 in the embodiment of the present application to integrally reinforce the structure of the first door stop 2.

The plurality of first reinforcement members 203 of the embodiment of the present application may be plate-shaped, which may be installed between the outer side of the first support plate 201 and the overlap plate 202 by welding or integrally molding, and the embodiment of the present application is not limited thereto.

Fig. 3 is a schematic structural view of the second door stop in fig. 1, and fig. 4 is a schematic explosive structural view of fig. 3. Referring to fig. 1, 3 and 4, in the embodiment of the present application, the middle portion of the chassis 1 is provided with second door stops 3, each of the second door stops 3 includes a reversible first baffle 301, the first baffle 301 is rotatably connected to the top surface of the chassis 1, the first baffle 301 is operatively erected on the chassis 1, and the first baffle 301 is disposed along the second direction when the first baffle 301 is in the erected state. In order not to hinder the loading of the container, the first baffle 301 of the second door 3 is in a horizontal state when the vehicle is not fully loaded, and the first baffle 301 of the second door 3 is in an upright state when the vehicle is not fully loaded, so that the container end door can be prevented from being opened accidentally.

Further, in the embodiment of the present application, a plurality of second door stops 3 may be disposed at intervals along the first direction in the middle of the chassis 1, so as to accommodate loading of containers with various specifications.

Fig. 5 is a schematic view of the working principle of the second door stop shown in fig. 3, and in combination with fig. 3 to 5, the second door stop 3 in this embodiment of the present application further includes a fixed sleeve 302, a movable sleeve 303, and a pull rod 304, where two fixed sleeves 302 are fixedly disposed on the chassis 1 at intervals along the second direction, the movable sleeve 303 is movably disposed between two fixed sleeves 304, the movable sleeve 303 is fixedly disposed on the inner side of the first baffle 301, a first jack 305 and a second jack 306 are disposed on the circumferential surface of the movable sleeve 303, the first jack 305 and the second jack 306 are sequentially disposed along the second direction, a radial plane of the movable sleeve 303 where the center lines of the first jack 305 and the second jack 306 in the second direction are located has an included angle, opposite ends of the first jack 305 and the second jack 306 are communicated, the pull rod 304 sequentially moves through one fixed sleeve 302, the movable sleeve 303, and the other fixed sleeve 302, and a stop 307 is disposed on the circumferential surface of the pull rod 304, and the stop 307 is operable to move in the first jack 305 and the second jack 306.

In this embodiment, two fixing sleeves 302 may be fixed on the middle beam of the chassis 1 in a welding manner, the movable sleeve 303 and the first baffle 301 may also be fixedly connected in a welding manner, and the pull rod 304 and the stop 307 may be fixedly connected in a welding manner or an integrally formed manner.

Further, in the embodiment of the present application, two ends of the pull rod 304 are respectively provided with a limiting rod 308, the two limiting rods 308 and the pull rod 304 form a U shape, and the two limiting rods 308 can limit the movement range of the pull rod 304.

Referring to fig. 3 and 4, in the embodiment of the present application, an avoidance groove 311 is disposed on the inner side of the first baffle 301 at the position corresponding to the stop 307, so as to facilitate the operation of the stop 307.

Further, in the embodiment of the present application, two opposite ends of the two fixed sleeves 302 are provided with first limiting plates 309, the two first limiting plates 309 may be 90 ° arc, two ends of the movable sleeve 303 are respectively provided with second limiting plates 310, the two first limiting plates 310 may be 180 ° arc, and the two second limiting plates 310 may be operatively abutted with the two first limiting plates 310 to form two 270 ° arc, that is, the two second limiting plates 310 in the embodiment of the present application may only perform 90 ° round trip overturn under the action of the two first limiting plates 309.

Fig. 6 is a schematic view showing a state that the second door stop shown in fig. 3 is in a non-working position, and in combination with fig. 5 and fig. 6, in the non-working position, the pull rod 304, the stop 307 and the first baffle 301 of the second door stop 3 in the embodiment of the present application are all in a horizontal state, and are located at the bottom of the container and do not interfere with loading of the container, and at this time, the stop 307 on the pull rod 304 is disposed in the first jack 303.

Fig. 7 is a schematic view of the state of the second door stop shown in fig. 3 in the working position, combining fig. 5 and fig. 7, when in the working position, the pull rod 304 drives the first baffle 301 to move along the second direction, the stop 307 on the pull rod 304 is clamped into the second jack 306 of the movable sleeve 303, the pull rod 304 rotates the movable sleeve 303 and the first baffle 301 to rotate together, when approaching to the upright position, the first baffle 301 of the second door stop 3 keeps the upright state, the pull rod 304, the movable sleeve 303 and the first baffle 301 stop rotating, and then the pull rod 304 pulls the stop 307 to move along the second direction, when the stop 307 leaves the second jack 306 of the movable sleeve 303, the pull rod 304 rotates the stop 307 together, so that the stop 307 is in the horizontal state again, at this time, the second door stop 3 is in the working position, the first baffle 301 of the second door stop 3 keeps the upright state, the container end door can be blocked from being opened, and the pull rod 304 is in the horizontal state, and is positioned at the bottom of the container.

In the railway container flatcar disclosed by the embodiment of the application, since the second door stop 3 of the flatcar is arranged in the middle of the underframe 1, the second door stop 3 comprises the first turnover baffle 301, the first baffle 301 is rotatably connected to the top surface of the underframe 1, the first baffle 301 is operably erected on the underframe 1, and when the first baffle 301 is in the erected state, the first baffle 301 is arranged along the second direction, namely, the first baffle 301 of the second door stop 3 is in the erected state in the working state so as to prevent the container end door from being accidentally opened; in the non-operating state of the second door stop 3, the first door stop 301 is turned to a horizontal state, so that the loading of the container is not affected. The second door stop 3 of this application embodiment can not open the hole on the floor of chassis and realize preventing the unexpected purpose of opening of collection dress end door, can not reduce the structural strength of vehicle, and simple structure uses convenient operation.

Fig. 8 is a schematic structural view of the first box stopper in fig. 1, fig. 9 is a schematic structural view of another view angle of fig. 8, and in combination with fig. 1, fig. 8 and fig. 9, the first box stoppers 4 in the embodiment of the present application are disposed on the bottom frame 3, two sides of the second direction of each first door stopper 2 are provided with the first box stoppers 4, the first box stoppers 4 include a second baffle 401 and a third baffle 402, the second baffle 401 is disposed along the first direction, the third baffle 402 is disposed along the second direction, and the vertical sides of the second baffle 401 and the third baffle 402 are connected to form an L-shaped structure with an opening facing into the bottom frame.

The second barrier 402 and the third barrier 403 of the first barrier 4 of the embodiment of the present application are always in an upright state for restricting the position in the length direction and the width direction of the container located on the chassis 1.

Further, in combination with fig. 8 and fig. 9, the first container rail 4 in the embodiment of the present application further includes a first bottom plate 403, the first bottom plate 403 is fixedly disposed on the chassis 1, the second baffle 401 and the third baffle 402 are both fixedly disposed on the first bottom plate 403, in practical implementation, the container is supported by the first bottom plate 403, the second baffle 401 limits a side position of the container, and the third baffle 402 limits an end position of the container.

In combination with fig. 9, in the embodiment of the present application, the bottom of the first bottom plate 403 is fixed on the chassis 1 by the first enclosing plate 404, the first enclosing plate 404 may be fixed on the chassis 1 by a welding manner, the first bottom plate 403 and the first enclosing plate 404 may be fixedly connected by a welding manner or an integrally formed manner, and the second baffle 401 and the third baffle 402 may be fixedly disposed on the first bottom plate 403 by a welding manner or an integrally formed manner.

Further, in conjunction with fig. 8 and fig. 9, the first box bumper 4 in the embodiment of the present application further includes a second reinforcing member 405, where the second reinforcing member 405 is also a plate, and a plurality of second reinforcing members 405 are disposed between the back of the second baffle 401 and the third baffle 402 and the first bottom plate 403 at intervals, so as to improve the strength of the first box bumper 4.

Fig. 10 is a schematic structural view of the second tank stopper in fig. 1, fig. 11 is an exploded schematic view of fig. 10, and in combination with fig. 1, fig. 10 and fig. 11, the second tank stopper 5 in the embodiment of the present application is disposed on the chassis 1, two sides of the second direction of each second door stopper 3 are provided with the second tank stopper 5, the second tank stopper 5 includes a second supporting plate 501 and a fourth supporting plate 502, the two second supporting plates 501 are sequentially disposed along the first direction, the fourth supporting plate 502 is disposed along the second direction, and the fourth supporting plate 502 is operatively disposed between the two second supporting plates 501 in a turnover manner.

Referring to fig. 10 and 11, in the embodiment of the present application, a second bottom plate 503 is fixedly disposed on the inner side of the bottom of each second support plate 501, and the second bottom plate 503 is fixedly disposed on the chassis 1.

Further, in connection with fig. 10 and 11, in the embodiment of the present application, the bottom of the second bottom plate 503 is fixed on the chassis 1 by the second enclosing plate 504, the second enclosing plate 504 may be fixed on the chassis 501 by welding, the second bottom plate 503 and the second enclosing plate 504 may be fixedly connected by welding or an integrally formed manner, and the second supporting plate 501 may be fixedly disposed on the second bottom plate 503 by welding or an integrally formed manner.

Further, in connection with fig. 10 and 11, in the embodiment of the present application, the inner side of the second bottom plate 503 is an inclined plane, and the top of the inclined plane extends outwards to guide the lifting transportation of the container, so as to facilitate the landing of the container.

Referring to fig. 10 and 11, in the embodiment of the present application, a plurality of reinforcing ribs 505 are disposed at intervals on the outer side of each second supporting plate 501, so as to improve the overall strength of the second tank stop 5.

Further, in the embodiment of the present application, a rotation shaft 506 is disposed between two adjacent reinforcing ribs 505 of two second support plates 501, and the fourth baffle 502 is connected to the rotation shaft 506 in a reversible manner.

The second case baffle 5 of this embodiment has set gradually three at the length direction's of chassis 1 side, has two kinds of states of working position and non-working position under following each operating mode, and under the working position state, as shown in fig. 10, fourth baffle 502 is in the inboard of two second bearing plates 501, and fourth baffle 502 is located between two containers this moment for the displacement of restriction container along first direction. In the inactive position, as shown in fig. 12, the fourth barrier 502 is flipped outside of the two second support plates, out of the way of the shipping container. Fig. 12 is a schematic view of the second gear under different working conditions, specifically:

working condition 1: 2 containers with 40 feet are loaded on the underframe, the second boxes 5 positioned in the middle are positioned in working positions, and the second boxes 5 positioned at two sides are positioned in non-working positions;

working condition 2: 4 containers of 20 feet are loaded on the underframe, and all the second boxes 5 are in the working position;

working condition 3: the underframe is loaded with 2 20 feet and 1 40 feet of containers, wherein the 40 feet of containers are positioned between the two 20 feet of containers, and at the moment, the second container stops 5 positioned in the middle are positioned in the non-working position, and the second container stops 5 positioned at the two sides are positioned in the working position.

In the embodiment of the present application, the installation positions and the installation numbers of the second case barrier 5 and the second door barrier 3 may be adaptively set according to the number and the size of the containers loaded on the chassis 1, which is not limited in the embodiment of the present application.

The two second bearing plates 501 of the second box baffle 5 of this application embodiment are used for preventing that the container side door is unexpected to be opened, and second baffle 502 operatively overturns and sets up between two second bearing plates 501, and the operation second baffle 502 overturns to the inboard of two second bearing plates 501, can restrict the tip of container, and the operation second baffle 502 overturns to the outside of two second bearing plates 501, can not influence the loading of the container of other specifications, has simple structure, convenient operation, and the preparation cycle is short, low in manufacturing cost's characteristics.

In combination with fig. 1, 6 and 7, in the embodiment of the present application, two first boxes 4 are disposed on two sides of each first door shield 2 in the second direction, two second boxes 5 are disposed on two sides of each second door shield 3 in the second direction, and according to the loading size and number of containers on the underframe, the second door shields 3 and the second boxes 5 can be operated respectively, so as to adapt to the shipment of containers with different sizes and different numbers on the underframe.

Compared with the prior art, the railway container flatcar that this application embodiment provided, its container adopts door shield and case to keep off fixedly, is convenient for observe during the hoist and mount, and door shield and case keep off simple structure, preparation easy maintenance, in addition, do not need the trompil on the floor face, consequently can not reduce the structural strength of vehicle, and convenient operation during the use.

Typically, the rail wagon will be concave in the middle after loading the cargo, so that a suitable counter-deformation, i.e. upper deflection, will be prefabricated during manufacture. The railway container flatcar of the embodiment of the application can be used for shipping 80-foot containers, and the required up-warping amount can be larger than that of a conventional railway container flatcar body which is longer by more than 1/3 of that of a conventional railway container flatcar which is used for shipping 40 or 60 feet. If the conventional container flat car lock head structure is adopted, the bearing surface of the container and the gap between the bearing surface and the floor are too small, so that the car body is easy to produce a box carrying phenomenon. The container door shield and the container shield are matched for use, the bearing surface of the container shield is properly lifted, the problem of carrying a container can be solved, an installation space is provided for the container door shield arranged on the upper portion of the floor, and the container door shield has good practical value.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A door stop assembly, wherein the door stop assembly is mounted on a chassis of a railway container flatcar, the door stop assembly comprising:

a second door stop disposed in a middle portion of the chassis, the second door stop comprising:

a reversible first baffle rotatably connected to the top surface of the chassis, the first baffle being operatively upstanding from the chassis, the first baffle being disposed in a second direction when the first baffle is in an upstanding state, the second direction being a width direction of the chassis;

the two fixing sleeves are fixedly arranged on the underframe along the second direction at intervals, the opposite ends of the two fixing sleeves are respectively provided with a first limiting plate, the two ends of the movable sleeve are respectively provided with a second limiting plate, and the two second limiting plates are in butt joint with the two first limiting plates in an operable manner;

2. The door stop assembly according to claim 1, wherein two ends of the pull rod are respectively provided with a limiting rod, and two limiting rods and the pull rod form a U shape.

3. The door stop assembly of claim 1 wherein the inner side of the first baffle is provided with a relief groove at a location corresponding to the stop.

4. The door stop assembly of claim 1 wherein the second door stop is disposed in a plurality at intervals in a first direction in a middle portion of the chassis, the first direction being a length direction of the chassis.

5. The door stop assembly of claim 1 further comprising a first door stop disposed at both ends of the chassis in a first direction, the first direction being a length direction of the chassis.

6. The door stop assembly of claim 5 wherein the first door stop further comprises a strap fixedly disposed on the bottom outer side of the first support plate and fixedly disposed on the chassis.

7. The door stop assembly of claim 6 wherein a plurality of first stiffening members are further spaced between the outer side of the first support plate and the strap.

8. A railway container flatcar, characterized in that it comprises a chassis on which the door stop assembly of any one of claims 1-7 is arranged.