A carriage door for coal mine railway transportation

Abstract

The present invention relates to the technical field of door structure, and in particular to a carriage door for railway transportation of coal mines, comprising an outer door and two guide rails located at the upper and lower sides of the outer door, the guide rails being transversely installed on the carriage, the outer door being used to block an opening area on the carriage from the outside; a slide is slidably provided on the guide rail, a plurality of guide rods parallel to each other are rotatably provided on the slide, and the guide rods on the slide are all rotatably connected to the outer door, and an inner door is fixed on the outer door; by adopting the outer door, the auxiliary door and the inner door, the blocking work on the inner and outer sides of the opening area on the carriage can be realized, the pressure of coal on the door can be effectively dispersed, the force can be directly transmitted to the inner wall of the carriage conveniently, the dangerous situation that may be caused by the traditional bolt and sleeve structure when subjected to huge squeezing force is avoided, and the potential harm to workers is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of door structures, in particular to a carriage door for coal mine railway transportation. Background Art

[0002] Coal is an important source of energy in modern times, mainly used for power generation, steel production, chemical raw materials and civil heating. After coal is mined, it needs to be transported to various places by rail to meet local needs.

[0003] At present, the carriage doors widely used in coal mine railway transportation are mostly traditional flap-type side doors, which are fixed to the carriage by bolts. When in use, workers need to lift the bolts and then open the side doors. However, the coal placed in the carriage exerts a large squeezing pressure on the side doors, resulting in a large friction between the bolts and the matching sockets on the carriage, making it difficult to lift the bolts and the side doors are not easy to open. At the same time, when the bolts are separated from the sockets, the squeezing pressure of the coal on the side doors can easily cause the side doors to open outwards quickly, causing the side doors to exert a large impact force on the workers, which can easily cause injuries to the workers. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a carriage door for coal mine railway transportation, and the specific technical solution adopted is:

[0005] A carriage door for coal mine railway transportation, comprising an outer door and two guide rails located at upper and lower sides of the outer door, wherein the guide rails are transversely mounted on the carriage, and the outer door is used to block an opening area on the carriage from the outside;

[0006] A slide is slidably provided on the guide rail, and a plurality of guide rods parallel to each other are rotatably provided on the slide, and the guide rods on the slide are all rotatably connected with the outer door, an inner door is fixed on the outer door, and the inner door extends to the inner side of the carriage through the opening area of ​​the carriage, and two auxiliary doors are lateraly slidably provided inside the inner door, and when the auxiliary door slides and extends outward on the inner door, the two auxiliary doors and the inner door block the opening area of ​​the carriage from the inner side of the carriage, and a plurality of first rollers are rotatably provided on each auxiliary door;

[0007] Wherein, a locking structure is arranged on the outer door, and the locking structure is fixed on the carriage.

[0008] Furthermore, the locking structure includes a support sleeve, the support sleeve is fixed on the carriage, a slide rod is inserted in the support sleeve for transverse sliding, a second roller is rotatably arranged at one end of the slide rod, and a handle is fixed at the other end of the slide rod;

[0009] The support sleeve and the slide rod are connected via a first leaf spring, and the second roller is used to block the outer door.

[0010] Furthermore, a rotating column is rotatably inserted in the middle of the outer door, and the end of the rotating column is rotatably installed on the inner door. Two first push-pull arms are relatively fixed on the outer wall of the rotating column. The first push-pull arms are along the radial direction of the rotating column. Two second push-pull arms are rotatably provided on the two first push-pull arms, and the two second push-pull arms are rotatably connected to the two auxiliary doors respectively.

[0011] Furthermore, a multi-faceted shaft is slidably inserted into the end of the rotating column outside the outer door, a control disk is fixed on the multi-faceted shaft, and the control disk is connected to the outer door through a first spring;

[0012] The outer side of the rotating column is sleeved with a first latching tooth ring and a second latching tooth ring which mesh with each other. The first latching tooth ring is fixed on the outer door, and the second latching tooth ring is fixed on the control disk through a connecting piece.

[0013] Furthermore, a first support plate is fixed to one end of each of the slides, and a rubber plate is provided on the first support plate to act as a buffer for the guide rod.

[0014] Furthermore, a second support plate is fixed at one end of each of the guide rails, a fixed cylinder is fixed on the side wall of the second support plate facing the first support plate, a moving cylinder is slidably arranged in the fixed cylinder, the moving cylinder and the fixed cylinder form a closed space, the moving cylinder is connected to the second support plate by a second spring, and an air hole connected to the fixed cylinder is opened on the second support plate.

[0015] Furthermore, it also includes a card plate and a baffle plate, wherein the card plate is fixed on the outer door, the baffle plate is fixed on the carriage, a wedge plate is rotatably provided on the top of the baffle plate, and the wedge plate and the baffle plate are connected by a second leaf spring;

[0016] Wherein, the side wall of the wedge plate facing the clamping plate is arranged as an inclined surface.

[0017] Furthermore, a rubber rib is provided on the auxiliary door, and the rubber rib is located outside the plurality of first rollers.

[0018] The advantages of the present invention are:

[0019] By adopting the outer door, the auxiliary door and the inner door, the inner and outer sides of the opening area on the carriage can be blocked, the pressure of the coal on the door is effectively dispersed, and the force is directly transmitted to the inner wall of the carriage, avoiding the dangerous situation that may be caused by the traditional bolt and sleeve structure when subjected to huge squeezing pressure, and reducing potential harm to workers; the multiple first rollers on the auxiliary door roll on the inner wall of the carriage, which greatly reduces the resistance of the auxiliary door when moving, making it easier for workers to open or close the carriage door, while also reducing the difficulty of opening the outer door and overcoming the problem of difficulty in opening the door caused by coal squeezing; the outer door is opened by a horizontal side push method, which reduces the space required for opening the door; in summary, the technical solution effectively solves the problems of traditional coal mine railway transportation carriage doors in terms of operational convenience, safety, space utilization and maintenance cost through innovative design ideas, showing high practical value and improvement potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the middle and outer doors;

[0023] Figure 3 yes Figure 2 A rear view structural diagram of ;

[0024] Figure 4 yes Figure 3 A structural diagram of the inner door and the auxiliary door from another perspective;

[0025] Figure 5 yes Figure 1 A schematic diagram of the enlarged structure of the middle support sleeve;

[0026] Figure 6 yes Figure 2 The schematic diagram of the enlarged structure of the central control panel from the side;

[0027] Figure 7 yes Figure 2 A schematic diagram of the enlarged cross-sectional structure of the middle fixed cylinder;

[0028] Markings in the accompanying drawings:

[0029] 1. Carriage; 2. Outer door; 3. Guide rail; 4. Slide; 5. Guide rod; 6. Inner door; 7. Auxiliary door; 8. First roller; 9. Support sleeve; 10. Slide rod; 11. Second roller; 12. Handle; 13. First leaf spring; 14. Rotating column; 15. First push-pull arm; 16. Second push-pull arm; 17. Polyhedral shaft; 18. Control panel; 19. First spring; 20. First snap ring; 21. Second snap ring; 22. Connecting piece; 23. First support plate; 24. Rubber plate; 25. Second support plate; 26. Fixed cylinder; 27. Moving cylinder; 28. Second spring; 29. ​​Air hole; 30. Card plate; 31. Baffle plate; 32. Wedge plate; 33. Second leaf spring; 34. Rubber retaining edge. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0033] like Figures 1 to 4 As shown, a carriage door for coal mine railway transportation of the present invention comprises an outer door 2 and two guide rails 3 located at the upper and lower sides of the outer door 2, wherein the guide rails 3 are transversely mounted on the carriage 1, and the outer door 2 is used to block the opening area on the carriage 1 from the outside;

[0034] A slide 4 is slidably provided on the guide rail 3, and a plurality of mutually parallel guide rods 5 are rotatably provided on the slide 4, and the guide rods 5 on the slide 4 are all rotatably connected to the outer door 2, an inner door 6 is fixed on the outer door 2, and the inner door 6 extends to the inner side of the carriage 1 through the opening area of ​​the carriage 1, and two auxiliary doors 7 are lateraly slidably provided in the inner door 6, and when the auxiliary doors 7 slide and extend outward on the inner door 6, the two auxiliary doors 7 and the inner door 6 block the opening area of ​​the carriage 1 from the inner side of the carriage 1, and a plurality of first rollers 8 are rotatably provided on each auxiliary door 7;

[0035] The outer door 2 is provided with a locking structure, which is fixed on the carriage 1 .

[0036] In detail, the outer door 2 is located at the outside of the opening area of ​​the carriage 1, and the two guide rails 3 are respectively located at the upper and lower sides of the outer door 2, and the guide rails 3 are laterally fixed on the outer wall of the carriage 1, so that the slide 4 on the guide rails 3 can move laterally, and the slide 4 and the outer door 2 are connected by a plurality of inclined and mutually parallel guide rods 5. Since the plurality of guide rods 5 are parallel to each other, the plurality of guide rods 5 can guide the outer door 2 so that the outer door 2 can perform translational movement when moving. The shape of the inner door 6 is bow-shaped, and the inner door 6 is buckled on the outer door 2. The inner door 6 opens left and right, and the two auxiliary doors 7 can slide outward on the inner door 6 through the left and right openings of the inner door 6. The inner door 6 and the two auxiliary doors 7 can block the opening area of ​​the carriage 1 on the inner side of the carriage 1, thereby achieving the working effect of blocking both the inner and outer sides of the opening area of ​​the carriage 1, and the plurality of first rollers 8 on the auxiliary door 7 are used to roll on the inner wall of the carriage 1, thereby reducing the resistance of the auxiliary door 7 when moving.

[0037] When in use, the inner door 6 and the two auxiliary doors 7 block the opening area of ​​the carriage 1 on the inner side of the carriage 1, and the coal contained in the carriage 1 mainly acts on the inner door 6 and the two auxiliary doors 7. Since the auxiliary doors 7 are supported on the inner wall of the carriage 1 by a plurality of first rollers 8, the inner wall of the carriage 1 can be used to provide support force for the coal blocking work, without the need to use structures such as bolts and sleeves to provide force for the coal blocking work as in the traditional method. This can improve the safety of coal during transportation. At this time, the outer door 2 is less affected by the force of the coal, and it mainly serves the purpose of blocking the opening area of ​​the carriage 1. When the coal in the carriage 1 needs to be unloaded, the two auxiliary doors 7 are retracted into the inner door 6, and the auxiliary doors 7 roll on the inner wall of the carriage 1 with the help of a plurality of first rollers 8, thereby reducing the resistance of the auxiliary doors 7 when moving. The force exerted by the coal on the inner door 6 is directly transmitted to the outer door 2, and the outer door 2 uses a locking structure to block the coal. Then, the worker stands on the side of the outer door 2 and opens the locking structure, so that the coal pushes the outer door 2 to open. Multiple guide rods 5 guide the outer door 2, and the outer door 2 performs an arc-shaped translational motion on the slide 4, and the outer door 2 deviates from the opening area of ​​the carriage 1. Due to the inertia of the outer door 2 when it is opened, the outer door 2 will drive the slide 4 to slide on the guide rail 3 through the guide rod 5, so that the outer door 2 completely deviates from the opening area of ​​the carriage 1, and the coal in the carriage 1 can be naturally discharged through the opening area of ​​the carriage 1, thereby reducing the difficulty of opening the door, avoiding impact injuries to workers when opening the door, and improving safety. Since the outer door 2 moves horizontally when it is opened, the space occupied by the outer door 2 can be reduced.

[0038] It should be pointed out that the locking structure is located on the other side of the movable area of ​​the outer door 2, which is convenient for workers to operate. When the outer door 2 is opened, it performs an arc motion on the slide 4 through multiple guide rods 5. Therefore, the initial motion trajectory of the outer door 2 is an arc, rather than perpendicular to the opening area of ​​the carriage 1. In this way, it is necessary to leave a sufficient gap between the inner door 6 and the opening area of ​​the carriage 1 for the inner door 6 to move, so as to avoid the inner door 6 colliding with the opening area of ​​the carriage 1 when the inner door 6 performs an arc motion synchronously with the outer door 2. When coal is placed in the carriage 1, the coal produces extrusion and friction force on the inner door 6, thereby preventing it from moving at will, so that the coal can be smoothly blocked by the inner door 6.

[0039] By adopting the outer door 2, the auxiliary door 7 and the inner door 6, the inner and outer sides of the opening area on the carriage 1 can be blocked, the pressure of the coal on the door is effectively dispersed, and the force is directly transmitted to the inner wall of the carriage 1, avoiding the dangerous situation that the traditional bolt and sleeve structure may cause when subjected to huge squeezing pressure, and reducing potential harm to workers; the multiple first rollers 8 on the auxiliary door 7 roll on the inner wall of the carriage 1, which greatly reduces the resistance of the auxiliary door 7 when moving, making it easier for workers to open or close the carriage door, while also reducing the difficulty of opening the outer door 2 and overcoming the problem of difficulty in opening the door caused by coal squeezing; the outer door 2 is opened by a horizontal side push method, which reduces the space required for opening the door; in summary, the technical solution effectively solves the problems of traditional coal mine railway transportation carriage doors in terms of operational convenience, safety, space utilization and maintenance cost through innovative design ideas, showing high practical value and improvement potential.

[0040] like Figure 5 As shown, the locking structure includes a support sleeve 9, which is fixed on the carriage 1, and a slide rod 10 is inserted and slidably inserted in the support sleeve 9, and a second roller 11 is rotatably provided at one end of the slide rod 10, and a handle 12 is fixed at the other end of the slide rod 10;

[0041] The support sleeve 9 and the slide rod 10 are connected via a first leaf spring 13 , and the second roller 11 is used to block the outer door 2 .

[0042] In detail, the support sleeve 9 is fixed on the outer wall of the carriage 1, and the second roller 11 is located on the outer side of the outer door 2 and blocks the outer door 2. When the outer door 2 needs to be unlocked, the worker stands on the side of the outer door 2 and away from the outer door 2. The worker moves the slide bar 10 on the support sleeve 9 through the handle 12. The slide bar 10 drives the second roller 11 to deviate from the outer door 2, and the second roller 11 rolls on the outer door 2, thereby stopping the second roller 11 from blocking the outer door 2, and the outer door 2 is opened. The first leaf spring 13 mainly provides a reset elastic force for the slide bar 10 and the second roller 11.

[0043] like Figure 4 As shown, a rotating column 14 is rotatably inserted in the middle of the outer door 2, and the end of the rotating column 14 is rotatably installed on the inner door 6. Two first push-pull arms 15 are relatively fixed on the outer wall of the rotating column 14. The first push-pull arms 15 are along the radial direction of the rotating column 14. Two second push-pull arms 16 are rotatably provided on the two first push-pull arms 15, and the two second push-pull arms 16 are rotatably connected to the two auxiliary doors 7 respectively.

[0044] In detail, by rotating the rotating column 14, the rotating column 14 can use the first push-pull arm 15 and the second push-pull arm 16 to pull the auxiliary door 7 to move, thereby adjusting the position of the auxiliary door 7, and the two auxiliary doors 7 move synchronously.

[0045] like Figure 6 As shown, the end of the rotating column 14 outside the outer door 2 is slidably inserted with a polygonal shaft 17, and a control disk 18 is fixed on the polygonal shaft 17. The control disk 18 is connected to the outer door 2 through a first spring 19;

[0046] The outer side of the rotating column 14 is sleeved with a first latch ring 20 and a second latch ring 21 that mesh with each other. The first latch ring 20 is fixed to the outer door 2, and the second latch ring 21 is fixed to the control disk 18 through a connecting piece 22.

[0047] In detail, due to the elastic pulling force of the first spring 19 on the control disk 18, the control disk 18 pushes the second latch ring 21 to engage with the first latch ring 20 through the connecting piece 22, and the first latch ring 20 locks the position of the second latch ring 21. At this time, the control disk 18 cannot rotate at will. When it is necessary to control the movement of the two sub-doors 7, the worker only needs to pull the control disk 18 outward to separate the second latch ring 21 from the first latch ring 20, and then rotate the control disk 18. The control disk 18 can drive the rotating column 14 to rotate through the first spring 19, thereby providing power for the rotating column 14. The function of the first spring 19 is mainly to provide elastic pulling force for the control disk 18. When the control disk 18 moves, the polygonal shaft 17 will slide on the rotating column 14, and due to the shape characteristics of the polygonal shaft 17, the polygonal shaft 17 and the rotating column 14 can rotate synchronously.

[0048] like Figure 2 As shown, a first support plate 23 is fixed to one end of each slide 4 , and a rubber plate 24 is provided on the first support plate 23 to buffer the guide rod 5 .

[0049] In detail, when the outer door 2 is opened, the outer door 2 moves in an arc translation on the slide 4, and the guide rod 5 rotates on the slide 4. A guide rod 5 on the slide 4 moves toward the rubber plate 24 and contacts the rubber plate 24. At this time, the rubber plate 24 plays a buffering and positioning role for the guide rod 5 and the outer door 2, preventing the outer door 2 from rotating a semicircle on the slide 4. At this time, the guide rod 5 is perpendicular to the slide 4, and the first support plate 23 provides support for the rubber plate 24.

[0050] like Figure 7 As shown, a second support plate 25 is fixed at one end of each of the guide rails 3, a fixed cylinder 26 is fixed on the side wall of the second support plate 25 facing the first support plate 23, a moving cylinder 27 is slidably arranged in the fixed cylinder 26, the moving cylinder 27 and the fixed cylinder 26 form a closed space, the moving cylinder 27 and the second support plate 25 are connected by a second spring 28, and an air hole 29 connected to the fixed cylinder 26 is opened on the second support plate 25.

[0051] In detail, when the slide 4 slides on the guide rail 3 due to the inertia of the outer door 2, the first support plate 23 moves toward the moving cylinder 27. When the moving cylinder 27 contacts the first support plate 23, the first support plate 23 will push the moving cylinder 27 to slide into the fixed cylinder 26. At this time, the space between the fixed cylinder 26 and the moving cylinder 27 is reduced, and the air in the space is discharged through the air hole 29. Due to the limitation of the diameter of the air hole 29, the air in the space cannot be discharged quickly, so that the air is used to have a damping and buffering effect on the first support plate 23, the slide 4 and the outer door 2. The second spring 28 provides a reset elastic force for the moving cylinder 27, and the elastic force value is relatively small.

[0052] like Figure 1 As shown, it also includes a card plate 30 and a baffle plate 31, the card plate 30 is fixed on the outer door 2, the baffle plate 31 is fixed on the carriage 1, a wedge plate 32 is rotatably provided on the top of the baffle plate 31, and the wedge plate 32 is connected to the baffle plate 31 through a second leaf spring 33;

[0053] The side wall of the wedge plate 32 facing the clamping plate 30 is configured as an inclined surface.

[0054] In detail, when the outer door 2 is opened and slides on the guide rail 3, the outer door 2 will drive the card plate 30 to move towards the wedge plate 32. The card plate 30 uses the inclined surface of the wedge plate 32 to push the wedge plate 32 to rotate upward, so that the wedge plate 32 deviates from the card plate 30. When the card plate 30 contacts the baffle plate 31, the wedge plate 32 naturally buckles down using the second leaf spring 33, so that the card plate 30 is stuck between the wedge plate 32 and the baffle plate 31, which is convenient for locking the position of the outer door 2 to prevent it from moving at will, and facilitate the smooth unloading of coal in the carriage 1.

[0055] like Figure 4 As shown, a rubber rib 34 is provided on the secondary door 7 , and the rubber rib 34 is located on the outer sides of the plurality of first rollers 8 .

[0056] In detail, by providing the rubber retaining edge 34 , the gap between the auxiliary door 7 and the inner wall of the carriage 1 can be conveniently blocked, thereby preventing the coal from entering between the plurality of first rollers 8 and affecting the normal rolling of the first rollers 8 .

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A carriage door for coal mine railway transportation, characterized in that: It comprises an outer door (2) and two guide rails (3) located at the upper and lower sides of the outer door (2), wherein the guide rails (3) are transversely mounted on the carriage (1), and the outer door (2) is used to block an opening area on the carriage (1) from the outside; A slide (4) is slidably provided on the guide rail (3), a plurality of mutually parallel guide rods (5) are rotatably provided on the slide (4), and the guide rods (5) on the slide (4) are all rotatably connected to the outer door (2), an inner door (6) is fixed on the outer door (2), the inner door (6) extends to the inner side of the carriage (1) through the opening area of ​​the carriage (1), two auxiliary doors (7) are lateraly slidably provided inside the inner door (6), when the auxiliary doors (7) slide and extend outward on the inner door (6), the two auxiliary doors (7) and the inner door (6) block the opening area of ​​the carriage (1) from the inner side of the carriage (1), and a plurality of first rollers (8) are rotatably provided on each auxiliary door (7); Wherein, a locking structure is provided on the outer door (2), and the locking structure is fixed on the carriage (1); The locking structure comprises a support sleeve (9), the support sleeve (9) being fixed on the carriage (1), a slide rod (10) being inserted and slidably inserted in the support sleeve (9) transversely, a second roller (11) being rotatably provided at one end of the slide rod (10), and a handle (12) being fixed at the other end of the slide rod (10); The support sleeve (9) and the slide rod (10) are connected via a first leaf spring (13), and the second roller (11) is used to block the outer door (2); A rotating column (14) is rotatably inserted in the middle of the outer door (2), and the end of the rotating column (14) is rotatably mounted on the inner door (6). Two first push-pull arms (15) are relatively fixed on the outer wall of the rotating column (14). The first push-pull arms (15) are along the radial direction of the rotating column (14). Two second push-pull arms (16) are rotatably arranged on the two first push-pull arms (15), and the two second push-pull arms (16) are rotatably connected to the two auxiliary doors (7) respectively. The end of the rotating column (14) outside the outer door (2) is slidably inserted into a polygonal shaft (17), a control disk (18) is fixed on the polygonal shaft (17), and the control disk (18) and the outer door (2) are connected via a first spring (19); The outer side of the rotating column (14) is sleeved with a first latching tooth ring (20) and a second latching tooth ring (21) which mesh with each other; the first latching tooth ring (20) is fixed on the outer door (2); and the second latching tooth ring (21) is fixed on the control disk (18) via a connecting piece (22).

2. A compartment door for coal mine railway transportation according to claim 1, characterized in that: A first support plate (23) is fixed to one end of each slide (4), and a rubber plate (24) is provided on the first support plate (23) to act as a buffer for the guide rod (5).

3. A compartment door for coal mine railway transportation according to claim 2, characterized in that: A second support plate (25) is fixed to one end of each guide rail (3); a fixed cylinder (26) is fixed to the side wall of the second support plate (25) facing the first support plate (23); a moving cylinder (27) is slidably arranged in the fixed cylinder (26); the moving cylinder (27) and the fixed cylinder (26) form a closed space; the moving cylinder (27) and the second support plate (25) are connected via a second spring (28); and an air hole (29) communicating with the fixed cylinder (26) is provided on the second support plate (25).

4. A carriage door for coal mine railway transportation according to claim 3, characterized in that: It also includes a clamping plate (30) and a baffle (31), wherein the clamping plate (30) is fixed on the outer door (2), and the baffle (31) is fixed on the carriage (1), a wedge plate (32) is rotatably provided on the top of the baffle (31), and the wedge plate (32) and the baffle (31) are connected via a second leaf spring (33); The side wall of the wedge plate (32) facing the clamping plate (30) is configured as an inclined surface.

5. A coal mine railway transportation compartment door according to claim 4, characterized in that: The auxiliary door (7) is provided with a rubber rib (34), and the rubber rib (34) is located outside the plurality of first rollers (8).

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