Rotary bottom door of railway hopper car

Abstract

The invention discloses a rotary bottom door of a railway hopper car, which relates to the technical field of bottom doors of railway hopper cars and comprises two bottom door components, a bearing mounting seat component, a transmission shaft component, a hydraulic cylinder and a hydraulic cylinder mounting seat. The two bottom door assemblies are symmetrically arranged on the two sides of the transmission shaft assembly and movably connected with the transmission shaft assembly. The bearing installation seat assemblies are arranged at the two ends of the transmission shaft assembly and connected with the transmission shaft assembly through fasteners. The hydraulic cylinder mounting base is fixed to the middle beam assembly, one end of the hydraulic cylinder is connected with the hydraulic cylinder mounting base in a hinged mode, and the other end of the hydraulic cylinder is connected with the transmission shaft assembly in a hinged mode; the transmission shaft assembly is provided with a locking device which is matched with the secondary locking mechanism to prevent the bottom door from being opened accidentally. By adopting the transmission mechanism passing through the dead point, the bottom door has a self-locking function, and the bottom door is prevented from being accidentally opened. The hydraulic control system is adopted to drive the bottom door to be opened and closed, and special ground facilities are not needed.

Description

Technical Field

[0001] The invention relates to the technical field of railway hopper car bottom doors, and more particularly to the technical field of a railway hopper car rotary bottom door. Background Art

[0002] At present, the bottom door of my country's railway hopper car is mainly set at the bottom of the car body. The existing patents on the locking of the bottom door disclose the following technologies:

[0003] The patent with the publication number CN210234960U and the patent name "A hopper car bottom door opening and closing mechanism" discloses the following contents: the hopper car includes an arc-shaped side wall, a hopper back, a bottom frame and a bottom door covering the side wall and the hopper back, the bottom door includes a left door and a right door installed on the bottom frame through a door hinge seat, and the bottom door opening and closing mechanism also includes: a transmission shaft, the transmission shaft is installed on the bottom frame to rotate around its own axis; a double crank, the double crank is connected to the transmission shaft through a key and rotates with the rotation of the transmission shaft; a left connecting rod, one end of the left connecting rod is rotatably connected to one end of the double crank, and the other end is rotatably connected to the left door; a right connecting rod, one end of the right connecting rod is rotatably connected to the other end of the double crank, and the other end is rotatably connected to the right door. The bottom door opening and closing mechanism has a simple structure and is easy to operate. It can open or close the left door and the right door at the same time, and the materials in the two side hoppers are diverted from the two sides of the hopper back to achieve intermediate unloading, which greatly improves the unloading efficiency.

[0004] The patent with the publication number CN103264706A and the patent name "bottom door opening and closing mechanism" discloses the following contents: including a transmission shaft, a double-linked lever, a first connecting rod, a second connecting rod, a first switch door arm, a second switch door arm and a bottom door; the transmission shaft is fixedly connected to the frame; the double-linked lever is installed on the transmission shaft; one end of the first connecting rod and the second connecting rod is respectively hinged to the double-linked lever, and the other end is respectively hinged to the outer side of the corresponding bottom door; one side of the bottom door is hinged to the bottom of the hopper car; the first switch door arm and the second switch door arm are respectively installed at both ends of the transmission shaft; the bottom door, the first connecting rod, the second connecting rod and the double-linked lever form a four-bar linkage; the first switch door arm or the second switch door arm rotates clockwise or counterclockwise, thereby driving the first connecting rod, the second connecting rod and the double-linked lever to move, thereby realizing the opening or closing of the bottom door. The present invention also provides a bottom door opening and closing system. The bottom door opening and closing mechanism provided by the present invention can avoid the serious wear problem of a single side wheel pair.

[0005] At present, the bottom doors of railway hopper cars in my country are mainly set at the bottom of the car body. One type is to open and close by pneumatic, hydraulic, electric control and other methods, and the other is a mechanical linkage mechanism, which uses ground facilities to achieve automatic opening and closing. The first type of bottom door mainly has two types: pull-out type and rotary type. The pneumatic, hydraulic and electric control devices directly act on the bottom door to drive the bottom door to open and close. This opening and closing method has a complex structure, low transmission efficiency and complex operation. If there is a problem with the equipment, it is easy to cause the bottom door to open accidentally. The second type of bottom door mainly adopts a flip type, which realizes automatic opening and closing by touching the ground facilities with the roller of the bottom door transmission device. This method requires the addition of corresponding ground contact facilities, which increases additional costs. Summary of the invention

[0006] The purpose of the present invention is to solve the technical problem that the locking structure of the existing hopper car bottom door is complicated and easily causes the bottom door to be opened accidentally. The present invention provides a rotating bottom door for a railway hopper car.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] The present invention provides a railway hopper car revolving bottom door, comprising two symmetrically arranged bottom door assemblies, a bearing mounting seat assembly, a transmission shaft assembly, a hydraulic cylinder and a hydraulic cylinder mounting seat;

[0009] The transmission shaft assembly is placed in the middle of the vehicle bottom, and the two bottom door assemblies are symmetrically placed on both sides of the transmission shaft assembly. The two bottom door assemblies are arranged longitudinally along the vehicle body and are movably connected to the transmission shaft assembly.

[0010] The bearing mounting seat assembly is fixed to the bottom of the vehicle body, and the bearing mounting seat assembly is placed at both ends of the transmission shaft assembly and connected to the transmission shaft assembly through fasteners;

[0011] The hydraulic cylinder mounting seat is fixed on the center beam assembly, one end of the hydraulic cylinder is connected to the hydraulic cylinder mounting seat by an articulated manner, and the other end of the hydraulic cylinder is connected to the transmission shaft assembly by an articulated manner;

[0012] The transmission shaft assembly is provided with a locking device cooperating with the secondary locking mechanism to prevent the bottom door from being accidentally opened.

[0013] Specifically, the dead point transmission mechanism is adopted to make the bottom door self-locking to prevent the bottom door from opening accidentally. The hydraulic control system is used to drive the bottom door to open and close, without the need to set up special ground facilities, reducing manufacturing costs. The hydraulic control system can secondary ensure that the bottom door will not open accidentally. A locking device is set on the main shaft, and the manually operated secondary locking mechanism is used to prevent the bottom door from opening accidentally.

[0014] In one embodiment, each of the bottom door assemblies includes a bottom door plate and two bottom door end plates symmetrically arranged at two ends of the bottom door plate.

[0015] In one embodiment, a cover plate connecting round pin, a connecting plate and a bottom door pin are arranged on the outer side of each bottom door end plate;

[0016] The connecting plate is fixed to the outer side of the bottom door end plate, the cover plate is fixed to the connecting plate, a plurality of rib plates are arranged between the cover plate and the connecting plate to form a groove structure, the connecting round pin is placed in the groove cavity and connected to the transmission shaft assembly, and the bottom door pin is placed above the bottom door end plate and connected to the funnel assembly.

[0017] In one embodiment, the bottom of the bottom door panel is also provided with a reinforcing beam, an outer frame, an inner frame and a plurality of reinforcing ribs;

[0018] The reinforcing beam is arranged at the middle position of the bottom of the bottom door panel, and the outer frame and the inner frame are respectively arranged at the bottom of the reinforcing beam and located at both sides of the reinforcing beam.

[0019] In one embodiment, a plurality of reinforcing ribs are evenly distributed between the outer frame and the reinforcing beam and between the inner frame and the reinforcing beam.

[0020] In one embodiment, the bottom door plate is a zigzag bottom door plate.

[0021] In one embodiment, the two ends of the bottom door plate are fixedly connected to the two bottom door end plates by welding.

[0022] In one embodiment, the transmission shaft assembly includes a transmission shaft and two composite connection structures symmetrically arranged at both ends of the transmission shaft;

[0023] Each of the composite connection structures comprises a first transmission lever, a locking seat, a locking block, a second transmission lever and two connecting rods;

[0024] The first transmission lever and the second transmission lever are rigidly connected to the transmission shaft respectively, the telescopic shaft of the hydraulic cylinder is movably connected to the free end of the first transmission lever, the two connecting rods are movably connected to the two ends of the second transmission lever, and are movably connected through round pins. The locking block and the locking seat are fixed at the end position of the transmission shaft, and cooperate with the secondary locking mechanism to prevent the bottom door from opening accidentally.

[0025] Specifically, the bearing mounting seat assembly is placed at the bottom of the vehicle body, and the rotating shaft assembly is hoisted at the middle of the vehicle bottom through the bearing mounting seat assembly. The two bottom door assemblies are connected to the connecting rod of the transmission shaft assembly, and the length of the connecting rod is adjustable. The two connecting rods are vertically arranged on both sides of the transmission shaft based on the transmission shaft. The two connecting rods, the transmission shaft and the second transmission lever together form a rotating mechanism passing the dead point. The bottom door pin is placed at the bottom door end plate near the center of the vehicle body, and the hydraulic cylinder connects the transmission shaft assembly and the first transmission lever.

[0026] In one embodiment, each end of the connecting rod is movably connected to the corresponding connecting round pin of the bottom door assembly.

[0027] In one embodiment, the length of each connecting rod is adjustable to ensure that the transmission mechanism forms a connecting rod mechanism that can pass the dead point.

[0028] Working principle:

[0029] The hydraulic cylinder extends, driving the bottom door drive shaft to rotate counterclockwise, and the connecting rod drives the two bottom door assemblies to rotate synchronously inward toward the longitudinal center of the vehicle body around the bottom door pin. At this time, the bottom door is opened.

[0030] The hydraulic cylinder contracts, driving the bottom door drive shaft to rotate clockwise, and the connecting rod drives the two bottom door assemblies to rotate outwards to both sides of the vehicle body around the bottom door pins synchronously. At this time, the bottom door is closed.

[0031] The beneficial effects of the present invention are as follows:

[0032] The dead point transmission mechanism is adopted to make the bottom door have a self-locking function to prevent the bottom door from opening accidentally.

[0033] The hydraulic control system is used to drive the bottom door to open and close, which eliminates the need for special ground facilities and reduces manufacturing costs. The hydraulic control system can also ensure that the bottom door will not be opened accidentally.

[0034] A locking device is arranged on the main shaft, which cooperates with the manually operated secondary locking mechanism, and the triple protection prevents the bottom door from being opened accidentally. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a schematic diagram of a revolving bottom door of a railway hopper car provided by the present invention;

[0037] Figure 2 is a schematic diagram of the closed door state of the present invention;

[0038] Figure 3 is a schematic diagram of the door opening state of the present invention;

[0039] Figure 4 is a schematic diagram of the structure of the bottom door assembly;

[0040] Figure 5 It is a three-dimensional structural schematic diagram of the transmission shaft assembly;

[0041] Figure 6 yes Figure 5 Left view of

[0042] Reference numerals: 1-bottom door assembly, 2-bearing mounting seat assembly, 3-transmission shaft assembly, 4-hydraulic cylinder, 5-hydraulic cylinder mounting seat, 6-middle beam assembly, 7-funnel assembly;

[0043] 1.1- bottom door end plate, 1.2- cover plate, 1.3- connecting round pin, 1.4- connecting plate, 1.5- bottom door pin, 1.6- bottom door plate, 1.7- reinforcing beam, 1.8- outer frame, 1.9- inner frame, 1.10- reinforcing rib;

[0044] 3.1-first transmission lever, 3.2-locking seat, 3.3-locking block, 3.4-second transmission lever, 3.5-connecting rod, 3.6-transmission shaft. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. 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, be constructed and operated in a specific orientation.

[0049] It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances, and therefore cannot be understood as limiting the present invention.

[0050] Example 1

[0051] like Figures 1 to 6 As shown, this embodiment provides a railway hopper car revolving bottom door, including two symmetrically arranged bottom door assemblies 1, a bearing mounting seat assembly 2, a transmission shaft assembly 3, a hydraulic cylinder 4 and a hydraulic cylinder mounting seat 5;

[0052] The transmission shaft assembly 3 is placed in the middle of the vehicle bottom, and the two bottom door assemblies 1 are symmetrically placed on both sides of the transmission shaft assembly 3. The two bottom door assemblies 1 are arranged along the longitudinal direction of the vehicle body and are movably connected with the transmission shaft 3.

[0053] The bearing mounting seat assembly 2 is fixed to the bottom of the vehicle body, and the bearing mounting seat assembly 2 is placed at both ends of the transmission shaft assembly 3 and connected to the transmission shaft assembly 3 through fasteners;

[0054] The hydraulic cylinder mounting seat 5 is fixed on the center beam assembly 6, one end of the hydraulic cylinder 4 is connected to the hydraulic cylinder mounting seat 5 by an articulated manner, and the other end thereof is connected to the transmission shaft assembly 3 by an articulated manner;

[0055] The transmission shaft assembly 3 is provided with a locking device that cooperates with the secondary locking mechanism to prevent the bottom door from being accidentally opened.

[0056] Specifically, the dead point transmission mechanism is adopted to make the bottom door self-locking to prevent the bottom door from opening accidentally. The hydraulic control system is used to drive the bottom door to open and close, without the need to set up special ground facilities, reducing manufacturing costs. The hydraulic control system can secondary ensure that the bottom door will not open accidentally. A locking device is set on the main shaft, and the manually operated secondary locking mechanism is used to prevent the bottom door from opening accidentally.

[0057] Example 2

[0058] like Figures 1 to 6 As shown, this embodiment provides a railway hopper car revolving bottom door, including two symmetrically arranged bottom door assemblies 1, a bearing mounting seat assembly 2, a transmission shaft assembly 3, a hydraulic cylinder 4 and a hydraulic cylinder mounting seat 5;

[0059] The transmission shaft assembly 3 is placed in the middle of the vehicle bottom, and the two bottom door assemblies 1 are symmetrically placed on both sides of the transmission shaft assembly 3. The two bottom door assemblies 1 are arranged along the longitudinal direction of the vehicle body and are movably connected with the transmission shaft 3.

[0060] The bearing mounting seat assembly 2 is fixed to the bottom of the vehicle body, and the bearing mounting seat assembly 2 is placed at both ends of the transmission shaft assembly 3 and connected to the transmission shaft assembly 3 through fasteners;

[0061] The hydraulic cylinder mounting seat 5 is fixed on the center beam assembly 6, one end of the hydraulic cylinder 4 is connected to the hydraulic cylinder mounting seat 5 by an articulated manner, and the other end thereof is connected to the transmission shaft assembly 3 by an articulated manner;

[0062] The transmission shaft assembly 3 is provided with a locking device that cooperates with the secondary locking mechanism to prevent the bottom door from being accidentally opened.

[0063] Each of the bottom door assemblies 1 comprises a bottom door plate 1.6 and two bottom door end plates 1.1 symmetrically arranged at both ends of the bottom door plate 1.6. A cover plate 1.2, a connecting round pin 1.3, a connecting plate 1.4 and a bottom door pin 1.5 are arranged on the outer side of each bottom door end plate 1.1; the connecting plate 1.4 is fixed to the outer side of the bottom door end plate 1.1, the cover plate 1.2 is fixed to the connecting plate 1.4, a plurality of ribs are arranged between the cover plate 1.2 and the connecting plate 1.4 to form a groove structure, the connecting round pin 1.3 is placed in the groove cavity and connected to the transmission shaft assembly 3, and the bottom door pin 1.5 is placed above the bottom door end plate 1.1 and connected to the funnel assembly 7.

[0064] Example 3

[0065] This embodiment is further optimized on the basis of embodiment 2, specifically:

[0066] A reinforcing beam 1.7, an outer frame 1.8, an inner frame 1.9 and a plurality of reinforcing ribs 1.10 are also provided at the bottom of the bottom door panel 1.6; the reinforcing beam 1.7 is arranged in the middle position of the bottom of the bottom door panel 1.6, and the outer frame 1.8 and the inner frame 1.9 are respectively arranged at the bottom of the reinforcing beam 1.7 and located on both sides of the reinforcing beam 1.7.

[0067] A plurality of reinforcing ribs 1.10 are evenly distributed between the outer frame 1.8 and the reinforcing beam 1.7 and between the inner frame 1.9 and the reinforcing beam 1.7.

[0068] The bottom door panel 1.6 is a zigzag bottom door panel.

[0069] The two ends of the bottom door plate 1.6 are fixedly connected to the two bottom door end plates 1.1 by welding.

[0070] Example 4

[0071] This embodiment is further optimized on the basis of embodiment 3, specifically:

[0072] The transmission shaft assembly 3 includes a transmission shaft 3.6 and two composite connection structures symmetrically arranged at both ends of the transmission shaft 3.6;

[0073] Each of the composite connection structures comprises a first transmission lever 3.1, a locking seat 3.2, a locking block 3.3, a second transmission lever 3.4 and two connecting rods 3.5;

[0074] The first transmission lever 3.1 and the second transmission lever 3.4 are rigidly connected to the transmission shaft 3.6 respectively, the telescopic shaft of the hydraulic cylinder 4 is movably connected to the free end of the first transmission lever 3.1, the two connecting rods 3.5 are movably connected to the two ends of the second transmission lever 3.4, and are movably connected through round pins, the locking block 3.3 and the locking seat 3.2 are fixed at the end position of the transmission shaft 3.6, and cooperate with the secondary locking mechanism to prevent the bottom door from being accidentally opened.

[0075] The end of each connecting rod 3.5 is movably connected to the connecting round pin 1.3 of the corresponding bottom door assembly 1.

[0076] The length of each connecting rod 3.5 is adjustable to ensure that the transmission mechanism forms a connecting rod mechanism that can pass the dead point.

[0077] Specifically, the bearing mounting seat assembly is placed at the bottom of the vehicle body, and the rotating shaft assembly is hoisted at the middle of the vehicle bottom through the bearing mounting seat assembly. The two bottom door assemblies are connected to the connecting rod of the transmission shaft assembly, and the length of the connecting rod is adjustable. The two connecting rods are vertically arranged on both sides of the transmission shaft based on the transmission shaft. The two connecting rods, the transmission shaft and the second transmission lever together form a rotating mechanism passing the dead point. The bottom door pin is placed at the bottom door end plate near the center of the vehicle body, and the hydraulic cylinder connects the transmission shaft assembly and the first transmission lever.

[0078] Working principle:

[0079] The hydraulic cylinder extends, driving the bottom door drive shaft to rotate counterclockwise, and the connecting rod drives the two bottom door assemblies to rotate synchronously inward toward the longitudinal center of the vehicle body around the bottom door pin. At this time, the bottom door is opened.

[0080] The hydraulic cylinder contracts, driving the bottom door drive shaft to rotate clockwise, and the connecting rod drives the two bottom door assemblies to rotate outwards to both sides of the vehicle body around the bottom door pins synchronously. At this time, the bottom door is closed.

Claims

1. A revolving bottom door for a railway hopper car, characterized in that: It comprises two symmetrically arranged bottom door assemblies (1), a bearing mounting seat assembly (2), a transmission shaft assembly (3), a hydraulic cylinder (4) and a hydraulic cylinder mounting seat (5); The transmission shaft assembly (3) is placed in the middle of the bottom of the vehicle, and the two bottom door assemblies (1) are symmetrically placed on both sides of the transmission shaft assembly (3). The two bottom door assemblies (1) are arranged along the longitudinal direction of the vehicle body and are movably connected to the transmission shaft (3). The bearing mounting seat assembly (2) is fixed to the bottom of the vehicle body, and the bearing mounting seat assembly (2) is placed at both ends of the transmission shaft assembly (3) and connected to the transmission shaft assembly (3) via fasteners; The hydraulic cylinder mounting seat (5) is fixed on the center beam assembly (6); one end of the hydraulic cylinder (4) is connected to the hydraulic cylinder mounting seat (5) in an articulated manner, and the other end of the hydraulic cylinder (4) is connected to the transmission shaft assembly (3) in an articulated manner; The transmission shaft assembly (3) is provided with a locking device which cooperates with the secondary locking mechanism to prevent the bottom door from being accidentally opened.

2. The railway hopper car revolving bottom door according to claim 1, characterized in that: Each of the bottom door assemblies (1) comprises a bottom door plate (1.6) and two bottom door end plates (1.1) symmetrically arranged at both ends of the bottom door plate (1.6).

3. The railway hopper car revolving bottom door according to claim 2, characterized in that: A cover plate (1.2), a connecting round pin (1.3), a connecting plate (1.4) and a bottom door pin (1.5) are arranged on the outer side of each bottom door end plate (1.1); The connecting plate (1.4) is fixed to the outside of the bottom door end plate (1.1), the cover plate (1.2) is fixed to the connecting plate (1.4), a plurality of ribs are arranged between the cover plate (1.2) and the connecting plate (1.4) to form a groove structure, the connecting round pin (1.3) is placed in the groove cavity and connected to the transmission shaft assembly (3), and the bottom door pin (1.5) is placed above the bottom door end plate (1.1) and connected to the funnel assembly (7).

4. The railway hopper car revolving bottom door according to claim 3, characterized in that: The bottom of the bottom door panel (1.6) is also provided with a reinforcing beam (1.7), an outer frame (1.8), an inner frame (1.9) and a plurality of reinforcing ribs (1.10); The reinforcing beam (1.7) is arranged at the middle position of the bottom of the bottom door panel (1.6), and the outer frame (1.8) and the inner frame (1.9) are respectively arranged at the bottom of the reinforcing beam (1.7) and located on both sides of the reinforcing beam (1.7).

5. The railway hopper car revolving bottom door according to claim 4, characterized in that: A plurality of reinforcing ribs (1.10) are evenly distributed between the outer frame (1.8) and the reinforcing beam (1.7), and between the inner frame (1.9) and the reinforcing beam (1.7).

6. The railway hopper car revolving bottom door according to claim 4, characterized in that: The bottom door plate (1.6) is a zigzag-shaped bottom door plate.

7. The railway hopper car revolving bottom door according to claim 4, characterized in that: The two ends of the bottom door plate (1.6) are fixedly connected to the two bottom door end plates (1.1) by welding.

8. The railway hopper car revolving bottom door according to claim 7, characterized in that: The transmission shaft assembly (3) comprises a transmission shaft (3.6) and two composite connection structures symmetrically arranged at both ends of the transmission shaft (3.6); Each of the composite connection structures comprises a first transmission lever (3.1), a locking seat (3.2), a locking block (3.3), a second transmission lever (3.4) and two connecting rods (3.5); The first transmission lever (3.1) and the second transmission lever (3.4) are rigidly connected to the transmission shaft (3.6) respectively, the telescopic shaft of the hydraulic cylinder (4) is movably connected to the free end of the first transmission lever (3.1), the two connecting rods (3.5) are movably connected to the two ends of the second transmission lever (3.4), the locking block (3.3) and the locking seat (3.2) are fixed at the end position of the transmission shaft (3.6), and cooperate with the secondary locking mechanism to prevent the bottom door from opening accidentally.

9. The railway hopper car revolving bottom door according to claim 8, characterized in that: The end of each connecting rod (3.5) is movably connected to the connecting round pin (1.3) of the corresponding bottom door assembly (1).

10. The railway hopper car revolving bottom door according to claim 8, characterized in that: The length of each connecting rod (3.5) is adjustable, ensuring that the transmission mechanism forms a connecting rod mechanism that can pass the dead point.

Images