A truck bed assembly and railway truck

Abstract

The application provides a truck carriage assembly and a railway truck, and belongs to the technical field of railway trucks.The truck carriage assembly comprises a carriage chassis, side plates, end plates, a top cover and a driving mechanism; the carriage chassis is used for supporting the carriage; the side plates are arranged on the carriage chassis; the end of the side plate away from the carriage chassis is provided with an inclined guide surface; the two end plates and the two side plates surround a containing cavity for containing goods; the inner wall of the top cover has a degree of freedom for moving along the outer wall of the side plate; the top cover is provided with a guide surface; the driving mechanism comprises a power assembly and two telescopic rod groups; one end of each of the two telescopic rod groups is rotationally connected with the top cover, and the other end of each of the two telescopic rod groups is drivingly connected with the power assembly.The truck carriage assembly provided by the application, by means of the slidingly matched guide surface and the guide surface, simultaneously stretches the telescopic rod groups, and the power assembly drives the telescopic rod groups to rotate, so that the top cover rotates along the outer wall of the side plate, and then the top of the carriage is opened or closed, thereby greatly improving the work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of railway freight car technology, specifically relating to a freight car assembly and a railway freight car. Background Technology

[0002] Railway freight transport is a mode of freight transport that uses trains as the main means of transport and is used for transporting heavy goods such as coal, grain, and vegetables. However, most of the carriages have open roofs, and dust, spillage, and rainwater erosion during transport are major problems that plague freight transport. This not only causes waste of resources and economic damage, but also pollutes the environment along the railway line.

[0003] Currently, during the operation of railway freight cars, waterproof tarpaulins are generally used to cover the top of the carriages to conceal the cargo. However, this method is cumbersome and inefficient, and it also requires workers to climb onto the roof, posing a safety hazard. Summary of the Invention

[0004] This invention provides a freight car assembly and a railway freight car to solve the technical problem of inconvenient operation caused by covering the top of the car in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a freight car body assembly, comprising:

[0006] The underframe of the carriage is located on the ground and is used to support the carriage;

[0007] There are two side panels, which are respectively disposed opposite to each other on the underframe of the carriage; the two side panels are arc-shaped and the concave sides are disposed opposite to each other; the side panel is provided with an inclined guide surface at the end away from the underframe of the carriage, and the lower end of the guide surface is disposed in the direction away from the carriage.

[0008] Two end plates are provided parallel to each other on the underframe of the carriage; the end plates are connected to the side plates, and the two end plates and the two side plates surround each other to form a receiving cavity for accommodating goods;

[0009] There are two top covers, each located above the two side plates; the top cover has an arc-shaped structure, and the curvature of the top cover is the same as that of the side plates; the inner wall of the top cover has the freedom to move along the outer wall of the side plates to open or close the receiving cavity; one end of the top cover has a guide surface that slides in conjunction with the guide surface.

[0010] There are two drive mechanisms, each located on one of the two end plates, used to drive the two top covers to move. Each drive mechanism includes a power component and two telescopic rod assemblies. The power component is located on the corresponding end plate. One end of each of the two telescopic rod assemblies is rotatably connected to the two top covers, and the other end is drively connected to the power component.

[0011] In one possible implementation, the telescopic rod assembly includes two connecting rods, a telescopic rod, and a first elastic element; one end of one connecting rod is rotatably connected to the top cover, and one end of the other connecting rod is drive-connected to the power assembly; each of the two connecting rods has a sliding groove at one of its opposite ends; both ends of the telescopic rod are respectively located in the two sliding grooves and are slidably connected to the sliding grooves; the first elastic element is sleeved on the telescopic rod, and both ends are respectively connected to one end of the corresponding connecting rod.

[0012] In one possible implementation, the connecting rod is further provided with a limiting groove communicating with the slide groove, and the width of the limiting groove is greater than the width of the slide groove; both ends of the telescopic rod are provided with limiting blocks that are slidably connected to the limiting groove.

[0013] In one possible implementation, a second elastic element is further provided in the limiting groove; the second elastic element is sleeved on the telescopic rod, and its two ends are respectively connected to the groove wall of the limiting groove and the limiting block.

[0014] In one possible implementation, the drive mechanism further includes a support plate and a reset member; the support plate is disposed on the corresponding end plate; and the two ends of the reset member are respectively connected to the support plate and the connecting rod.

[0015] In one possible implementation, the power assembly includes a power plate, two transmission gears, and a drive member; the power plate is located on the outside of the end plate and has the freedom to slide up and down along the end face of the end plate; transmission racks are provided on opposite sides of the power plate; the two transmission gears are respectively located on both sides of the power plate and are rotatably connected to the end plate, and the transmission gears are meshed with the corresponding transmission racks; the two connecting rods of the two telescopic rod assemblies are respectively located on the two transmission gears; the drive member is located on the end plate and its free end is connected to the power plate for driving the power plate to move.

[0016] In one possible implementation, the power assembly further includes a support frame; the support frame is disposed outside the end plate; the drive component includes a driver and a drive gear, the driver is disposed on the support frame, and the drive gear is disposed at the free end of the driver; the power plate is provided with a drive rack that meshes with the drive gear.

[0017] In one possible implementation, the end plate away from the front of the railway freight car is provided with two unloading gates for unloading. One unloading gate is provided with a hook that is rotatably connected to the unloading gate; the other unloading gate is provided with a hook seat that is fixedly connected to the unloading gate, and the hook engages with the hook seat; the lower end of the power plate is in contact with the upper end of the hook.

[0018] In one possible implementation, the inner wall of the side plate is further provided with a plurality of parallel and spaced reinforcing ribs.

[0019] The beneficial effects of the truck body assembly provided by this invention are as follows: Compared with the prior art, when the truck body assembly of this invention needs to open the top of the truck body, the power component of the drive mechanism controls the telescopic rod assembly to rotate, thereby causing the telescopic rod assembly to drive the top cover to rotate. Since the curvature of the top cover is the same as that of the side plate, and the guide surface on the side plate slides in cooperation with the guide surface on the top cover, and one end of the telescopic rod assembly is rotatably connected to the top cover, when the top cover rotates, the guide surface of the top cover slides along the guide surface of the side plate in a direction away from the truck body, and stretches the telescopic rod assembly to make the inner wall of the top cover slide along the outer wall of the side plate, thereby opening the top of the truck body and exposing the receiving cavity. When closing the top of the truck body, the power component drives the telescopic rod assembly to rotate in the opposite direction, and the telescopic rod assembly resets by elastic force, thereby driving the top cover to reset, thereby closing the receiving cavity. The truck body is supported by the truck body underframe. The vehicle body utilizes two side plates and two end plates to form a cavity for accommodating goods. Through this method, with the aid of sliding guide surfaces, the power assembly drives the telescopic rod assembly to rotate while it is being extended, causing the top cover to rotate along the outer wall of the side plates, thus opening or closing the top of the carriage, significantly improving work efficiency. Simultaneously, thanks to the telescopic rod assembly and the arc-shaped structure of the side plates and top cover, the inner wall of the top cover always slides on the outer wall of the side plates during the process of moving the top of the carriage from a closed top to an open top, or from an open top to a closed top, reducing the space occupied by the top cover. Because the top cover has an arc-shaped structure, rainwater can slide directly down the cover. Furthermore, a gap exists between the top cover and the end plates, forming a ventilation channel that allows for ventilation of the goods during long-distance transport, thus better protecting them.

[0020] Another object of the present invention is to provide a railway freight car comprising any of the above-described freight car assemblies.

[0021] The railway freight car provided by this invention, due to its connection with the carriage, utilizes a slidingly fitted guide surface and a guide surface to drive the telescopic rod assembly to rotate simultaneously with the extension of the telescopic rod assembly. This causes the top cover to rotate along the outer wall of the side plate, thereby opening or closing the top of the carriage, significantly improving work efficiency. Simultaneously, thanks to the telescopic rod assembly and the arc-shaped structure of the side plate and top cover, the inner wall of the top cover always slides on the outer wall of the side plate during the process of the top cover moving from a closed carriage top to an open carriage top, or vice versa, reducing the space occupied by the top cover. Because the top cover has an arc-shaped structure, rainwater can slide directly down the top cover. Furthermore, a gap exists between the top cover and the end plate, forming a ventilation channel that allows for ventilation of the goods during long-distance transport, thus better protecting the cargo. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the truck body assembly provided in an embodiment of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of the truck body assembly provided in an embodiment of the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the telescopic rod assembly provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection between the end plate and the power assembly provided in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the power assembly provided in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the connection between the side plate and the end plate provided in an embodiment of the present invention;

[0029] Figure 7 This is a rear view of the truck body assembly provided in an embodiment of the present invention.

[0030] The following are the labeling elements in the figure:

[0031] 1. Carriage base frame; 2. Side plate; 21. Guide surface; 3. End plate; 31. Receiving cavity; 32. Unloading door; 33. Passageway; 4. Top cover; 41. Guide surface; 5. Drive mechanism; 51. Power assembly; 511. Power plate; 512. Transmission gear; 513. Transmission rack; 514. Support frame; 515. Driver; 516. Drive gear; 517. Drive rack; 52. Telescopic rod assembly; 521. Connecting rod; 522. Telescopic rod; 523. First elastic element; 524. Slide groove; 525. Limiting groove; 526. Limiting block; 527. Second elastic element; 53. Support plate; 54. Reset element; 6. Hook; 7. Hook seat; 8. Reinforcing rib. Detailed Implementation

[0032] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] Please see Figures 1 to 7The present invention will now describe the truck body assembly provided. A truck body assembly includes a chassis 1, side panels 2, end panels 3, a top cover 4, and a drive mechanism 5. The chassis 1 is mounted on the ground and supports the truck body. There are two side panels 2, which are respectively positioned opposite each other on the chassis 1. The two side panels 2 have an arc-shaped structure, with their concave sides facing each other. One end of each side panel 2 away from the chassis 1 has an inclined guide surface 21, with the lower end of the guide surface 21 facing away from the truck body. There are two end panels 3, which are parallel and spaced apart on the chassis 1. The end panels 3 are connected to the side panels 2, and the two end panels 3 and the two side panels 2 surround each other to form a receiving cavity 31 for accommodating goods. The number of top covers 4 is... There are two drive mechanisms 5, each located above the two side plates 2. The top cover 4 has an arc-shaped structure, and the curvature of the top cover 4 is the same as that of the side plate 2. The inner wall of the top cover 4 has the freedom to move along the outer wall of the side plate 2 to open or close the receiving cavity 31. One end of the top cover 4 is provided with a guide surface 41 that slides in cooperation with the guide surface 21. There are two drive mechanisms 5, each located on one of the two end plates 3, for driving the two top covers 4 to move. The drive mechanism 5 includes a power component 51 and two telescopic rod groups 52. The power component 51 is located on the corresponding end plate 3. One end of each of the two telescopic rod groups 52 is rotatably connected to the two top covers 4, and the other end is transmittedly connected to the power component 51.

[0037] Compared with the prior art, the truck body assembly provided in this embodiment, when used, requires opening the top of the truck body. The power component 51 of the drive mechanism 5 controls the telescopic rod assembly 52 to rotate, thereby causing the telescopic rod assembly 52 to rotate the top cover 4. Since the curvature of the top cover 4 is the same as that of the side plate 2, and the guide surface 21 inclined on the side plate 2 slides in cooperation with the guide surface 41 on the top cover 4, and one end of the telescopic rod assembly 52 is rotatably connected to the top cover 4, when the top cover 4 rotates, the guide surface 41 of the top cover 4 slides along the guide surface 21 of the side plate 2 in a direction away from the truck body, and stretches the telescopic rod assembly 52 so that the inner wall of the top cover 4 slides along the outer wall of the side plate 2, thereby opening the top of the truck body and exposing the receiving cavity 31. When closing the top of the truck body, the power component 51 drives the telescopic rod assembly 52 to rotate in the opposite direction, and the telescopic rod assembly 52 resets by elastic force, thereby causing the top cover 4 to reset, thus closing the receiving cavity 31. The truck body is supported by the truck body frame 1. The overall structure utilizes two side plates 2 and two end plates 3 to form a receiving cavity 31 for accommodating goods. In this way, with the aid of slidingly fitted guide surfaces 21 and 41, while the telescopic rod assembly 52 is stretched, the power component 51 drives the telescopic rod assembly 52 to rotate, causing the top cover 4 to rotate along the outer wall of the side plates 2, thereby opening or closing the top of the carriage, greatly improving work efficiency. Simultaneously, thanks to the telescopic rod assembly 52 and the arc-shaped structure of the side plates 2 and top cover 4, the inner wall of the top cover 4 always slides on the outer wall of the side plates 2 during the process of the top cover 4 moving from the closed top of the carriage to the open top, or from the open top of the carriage to the closed top of the carriage, reducing the space occupied by the top cover 4. Because the top cover 4 has an arc-shaped structure, rainwater can slide directly down using the top cover 4. At the same time, there is a gap between the top cover 4 and the end plates 3, forming a ventilation channel 33, which allows for ventilation of the goods during long-distance transportation, thus better protecting the goods.

[0038] Please see Figures 1 to 3As a specific embodiment of the truck body assembly provided by the present invention, the telescopic rod assembly 52 includes two connecting rods 521, a telescopic rod 522, and a first elastic element 523; one end of one connecting rod 521 is rotatably connected to the top cover 4, and one end of the other connecting rod 521 is drive-connected to the power assembly 51; each of the two connecting rods 521 has a sliding groove 524 at one end opposite to the other; both ends of the telescopic rod 522 are respectively located in the two sliding grooves 524 and are slidably connected to the sliding grooves 524; the first elastic element 523 is sleeved on the telescopic rod 522, and both ends are respectively connected to one end of the corresponding connecting rod 521; the power assembly 51 drives one connecting rod 521 to rotate, thereby driving the telescopic rod 522 and the other connecting rod 523 to rotate. When the connecting rod 521 rotates, under the action of the guide surface 41 and the guide surface 21, another connecting rod 521 controls the top cover 4 to move to the outer wall of the side plate 2 and slide along the outer wall of the side plate 2 to open the receiving cavity 31. When the top cover 4 moves to the outer wall of the side plate 2, the top cover 4 will drive the telescopic rod 522 to slide in the slide groove 524 and stretch the first elastic element 523. When closing the receiving cavity 31, the power component 51 drives the telescopic rod assembly 52 to reverse. When the guide surface 41 of the top cover 4 moves above the guide surface 21 of the side plate 2, the stretched first elastic element 523 resets with the help of elastic force, thereby driving the telescopic rod 522 to reset, so that the top cover 4 resets to close the receiving cavity 31. The first elastic element 523 is a spring.

[0039] Please see Figure 3 As a specific embodiment of the truck body assembly provided by the present invention, the connecting rod 521 is also provided with a limiting groove 525 communicating with the slide groove 524, and the groove width of the limiting groove 525 is greater than the groove width of the slide groove 524; both ends of the telescopic rod 522 are provided with limiting blocks 526 that are slidably connected to the limiting groove 525; in order to prevent the first elastic element 523 from failing due to excessive weight of the top cover 4 when the receiving cavity 31 is opened, causing the telescopic rod 522 to disengage from the slide groove 524, limiting blocks 526 are provided at both ends of the telescopic rod 522, and the limiting blocks 526 slide in the limiting groove 525 to ensure the normal use of the telescopic rod assembly 52.

[0040] Please see Figure 3 As a specific embodiment of the truck body assembly provided by the present invention, a second elastic element 527 is also provided in the limiting groove 525; the second elastic element 527 is sleeved on the telescopic rod 522, and its two ends are respectively connected to the groove wall of the limiting groove 525 and the limiting block 526; when the top cover 4 is opened, the telescopic rod 522 slides in the sliding groove 524, which drives the limiting block 526 to slide in the limiting groove 525, thereby compressing the second elastic element 527; when the top cover 4 is closed, the second elastic element 527 resets with the help of elastic force; the second elastic element 527 can not only speed up the reset of the telescopic rod assembly 52, but also reduce the deformation of the first elastic element 523, thereby better protecting the telescopic rod assembly 52; the second elastic element 527 is a spring.

[0041] Please see Figure 1 and Figure 2 As a specific embodiment of the truck body assembly provided by the present invention, the drive mechanism 5 is further provided with a support plate 53 and a reset member 54; the support plate 53 is disposed on the corresponding end plate 3; the two ends of the reset member 54 are respectively connected to the support plate 53 and the connecting rod 521; with the help of the support plate 53 and the reset member 54, when the top cover 4 is opened, the reset member 54 is stretched when the connecting rod 521 rotates; when the top cover 4 is closed, the reset member 54 is reset by means of the elastic force; the reset member 54 can not only speed up the reset of the telescopic rod assembly 52, but also reduce the deformation of the first elastic member 523, thereby better protecting the telescopic rod assembly 52; the reset member 54 is a spring.

[0042] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5 As a specific embodiment of the truck body assembly provided by the present invention, the power assembly 51 includes a power plate 511, two transmission gears 512, and a driving member; the power plate 511 is located on the outside of the end plate 3 and has the freedom to slide up and down along the end surface of the end plate 3; transmission racks 513 are provided on opposite sides of the power plate 511; the two transmission gears 512 are respectively located on both sides of the power plate 511 and are rotatably connected to the end plate 3, and the transmission gears 512 are meshed with the corresponding transmission racks 513; the two connecting rods 521 of the two telescopic rod assemblies 52 are respectively located on the two transmission gears 512; the driving member is located on the end plate 3 and its free end is connected to the power plate 511 for driving the power plate 511 to move; when the power assembly 51 controls the connecting rods 521 of the telescopic rod assembly 52 to rotate, the driving member drives the power plate 511 to move up and down along the end plate 3 of the end plate 3, and the transmission racks 513 on the power plate 511 move synchronously, thereby driving the two transmission gears 512 to rotate, thereby driving the connecting rods 521 to rotate.

[0043] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5 As a specific embodiment of the truck body assembly provided by the present invention, the power assembly 51 further includes a support frame 514; the support frame 514 is disposed on the outside of the end plate 3; the driving component includes a driver 515 and a driving gear 516, the driver 515 is disposed on the support frame 514, and the driving gear 516 is disposed on the free end of the driver 515; the power plate 511 is provided with a driving rack 517 that meshes with the driving gear 516; when the driving component drives the power plate 511 to move, the free end of the driver 515 controls the driving gear 516 to rotate, the driving gear 516 drives the driving rack 517 to move, thereby controlling the movement of the power plate 511; the support frame 514 is used to protect the power assembly 51.

[0044] Please see Figure 7 As a specific embodiment of the freight car assembly provided by the present invention, the end plate 3 away from the front of the railway freight car is provided with two unloading doors 32 for unloading. One unloading door 32 is provided with a hook 6 rotatably connected to the unloading door 32; the other unloading door 32 is provided with a hook seat 7 fixedly connected to the unloading door 32, and the hook 6 is engaged with the hook seat 7; the lower end of the power plate 511 is in contact with the upper end of the hook 6; the hook 6 and the hook seat 7 are used to lock or open the unloading door 32; at the same time, when the unloading door 32 is locked, the lower end of the power plate 511 is in contact with the upper end of the hook 6, and the power plate 511 is used to prevent the hook 6 from rotating arbitrarily.

[0045] Please see Figure 6 As a specific embodiment of the truck body assembly provided by the present invention, the inner wall of the side plate 2 is also provided with a plurality of parallel spaced reinforcing ribs 8; the reinforcing ribs 8 are used to improve the overall structural strength and structural stability of the truck body.

[0046] Not shown in the figure, this embodiment of the invention also provides a railway freight car, which includes any of the freight car assemblies described above.

[0047] The railway freight car provided by this invention, because the freight car is connected to the carriage, utilizes the sliding fit guide surface 21 and guide surface 41 to drive the telescopic rod assembly 52 to rotate while the telescopic rod assembly 52 is stretched, causing the top cover 4 to rotate along the outer wall of the side plate 2, thereby opening or closing the top of the carriage, thus greatly improving work efficiency; at the same time, with the help of the telescopic rod assembly 52 and the arc-shaped structure of the side plate 2 and the top cover 4, the inner wall of the top cover 4 always slides on the outer wall of the side plate 2 during the process of the top cover 4 moving from the closed top of the carriage to the open top of the carriage, or from the open top of the carriage to the closed top of the carriage, reducing the space occupied by the top cover 4; since the top cover 4 has an arc-shaped structure, rainwater can slide directly down with the help of the top cover 4 when it falls; at the same time, there will be a gap between the top cover 4 and the end plate 3, forming a ventilation channel 33, which can ventilate the goods during long-distance transportation, thereby better protecting the goods.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A freight car body assembly, characterized in that, include: The underframe of the carriage is located on the ground and is used to support the carriage; There are two side panels, which are respectively disposed opposite to each other on the underframe of the carriage; the two side panels are arc-shaped and the concave sides are disposed opposite to each other; the side panel is provided with an inclined guide surface at the end away from the underframe of the carriage, and the lower end of the guide surface is disposed in the direction away from the carriage. Two end plates are provided parallel to each other on the underframe of the carriage; the end plates are connected to the side plates, and the two end plates and the two side plates surround each other to form a receiving cavity for accommodating goods; There are two top covers, each located above the two side plates; the top cover has an arc-shaped structure, and the curvature of the top cover is the same as that of the side plates; the inner wall of the top cover has the freedom to move along the outer wall of the side plates to open or close the receiving cavity; one end of the top cover has a guide surface that slides in conjunction with the guide surface. There are two drive mechanisms, each located on one of the two end plates, used to drive the two top covers to move. Each drive mechanism includes a power component and two telescopic rod assemblies. The power component is located on the corresponding end plate. One end of each of the two telescopic rod assemblies is rotatably connected to the two top covers, and the other end is drively connected to the power component.

2. A freight car body assembly as described in claim 1, characterized in that, The telescopic rod assembly includes two connecting rods, a telescopic rod, and a first elastic element; one end of one connecting rod is rotatably connected to the top cover, and one end of the other connecting rod is drive-connected to the power assembly; each of the two connecting rods has a sliding groove at one of its opposite ends; both ends of the telescopic rod are respectively located in the two sliding grooves and are slidably connected to the sliding grooves; the first elastic element is sleeved on the telescopic rod, and both ends are respectively connected to one end of the corresponding connecting rod.

3. A freight car body assembly as described in claim 2, characterized in that, The connecting rod is also provided with a limiting groove that communicates with the sliding groove, and the width of the limiting groove is greater than the width of the sliding groove; both ends of the telescopic rod are provided with limiting blocks that are slidably connected to the limiting groove.

4. A freight car body assembly as described in claim 3, characterized in that, The limiting groove is also provided with a second elastic element; the second elastic element is sleeved on the telescopic rod, and its two ends are respectively connected to the groove wall of the limiting groove and the limiting block.

5. A freight car body assembly as described in claim 2, characterized in that, The drive mechanism is further provided with a support plate and a reset component; the support plate is disposed on the corresponding end plate; the two ends of the reset component are respectively connected to the support plate and the connecting rod.

6. A freight car body assembly as described in claim 2, characterized in that, The power assembly includes a power plate, two transmission gears, and a drive component. The power plate is located on the outside of the end plate and has the freedom to slide up and down along the end face of the end plate. Transmission racks are provided on opposite sides of the power plate. The two transmission gears are respectively located on both sides of the power plate and are rotatably connected to the end plate. The transmission gears are meshed with the corresponding transmission racks. The two connecting rods of the two telescopic rod assemblies are respectively located on the two transmission gears. The drive component is located on the end plate and its free end is connected to the power plate for driving the power plate to move.

7. A freight car body assembly as described in claim 6, characterized in that, The power assembly also includes a support frame; the support frame is disposed on the outside of the end plate; the driving component includes a driver and a driving gear, the driver is disposed on the support frame, and the driving gear is disposed on the free end of the driver; the power plate is provided with a driving rack that meshes with the driving gear.

8. A freight car body assembly as described in claim 6, characterized in that, The end plate away from the front of the railway freight car is provided with two unloading doors for unloading. One unloading door is provided with a hook that is rotatably connected to the unloading door; the other unloading door is provided with a hook seat that is fixedly connected to the unloading door, and the hook engages with the hook seat; the lower end of the power plate is in contact with the upper end of the hook.

9. A freight car body assembly as described in claim 1, characterized in that, The inner wall of the side plate is also provided with multiple parallel and spaced reinforcing ribs.

10. A railway freight car, characterized in that, Including a freight car body assembly as described in any one of claims 1-9.

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