Low side door lock system and lock control method

Abstract

A low-side door locking system and locking method includes a locking assembly. The locking assembly includes a door stop and a lock stop rotatably mounted on a side beam. A first support with an upper opening is fixed on the outer wall of the side beam. The upper end of the door stop is a free end. When the door stop is upright, the lower end of the door stop is located inside the first support. The center of gravity of the door stop is close to the top side of the door stop. The lock stop is located on one side of the first support to restrict the lower end of the door stop from rotating out of the first support. A lock stop push rod is installed at the end of the side beam. The lock stop push rod is close to the inner wall of the side beam. The lock stop push rod is movably configured to push the lock stop to tilt around an axis. The lock stop can rotate under the push of the lock stop push rod to release the restriction on the door stop. Since the center of gravity of the door stop is close to the top side of its own side, it can automatically tilt under the influence of gravity. The unlocking process can be achieved simply by pushing the lock stop. The operation is simple and convenient, with a high degree of automation. No operator is required to stand in front of the side door, and the safety performance is high.

Description

Technical Field

[0001] This invention relates to the field of railway freight car technology, and in particular to a low-side door locking system and locking method. Background Technology

[0002] Railway low-side flatcars, also known as gravel cars, are a special type of railway freight car, mainly used to transport specific types of goods. In order to ensure that the goods do not overflow from the car during transportation, and to ensure the airtightness and safety of the car, the side doors of railway low-side flatcars need to be locked. Conventional side door locking is usually mechanical locking.

[0003] To reduce the workload of mechanical locking and improve work efficiency, a mechanical locking system (publication number CN117605363A) has been developed to improve the opening and closing efficiency of the low-side side door. A door stop plate is rotatably installed on the side beam, and a side door hook is fixedly installed on the side door. The side door is locked by the cooperation of the L-shaped door stop plate and the L-shaped side door hook. The side door is released by lifting the door stop. This simplifies the structure of the side door locking and improves the opening and closing efficiency.

[0004] Existing mechanical locking systems require manual lifting and repositioning of the door stops to unlock them, which is a complex process with low automation, resulting in low unlocking efficiency and poor safety. Manual unlocking requires standing in front of the side door, which is easily opened by its own weight or the pushing of goods, potentially colliding with the operator. Furthermore, all door stops must be lifted and moved sequentially to unlock, making it impossible to operate all door stops at once, leading to low work efficiency and a large workload. Summary of the Invention

[0005] To address the technical problems of low unlocking efficiency and poor security performance of existing mechanical locking systems mentioned above, this invention provides a low-side door locking system and locking method.

[0006] The technical solution of this invention is as follows:

[0007] This invention provides a low-side door locking system, including a locking assembly installed on a side door assembly. The side door assembly includes a side beam and a side door rotatably connected to the side beam. The locking assembly includes a door stop and a lock stop rotatably mounted on the side beam. A first support with an upper opening is fixedly provided on the outer side wall of the side beam. The upper end of the door stop is a free end, and the lower end of the door stop is rotatably mounted on the first support about an axis. When the door stop is upright, the lower end of the door stop is located inside the first support, and the center of gravity of the door stop is close to the top of the door stop. The lock stop is located on one side of the first support to prevent the lower end of the door stop from rotating out of the first support. The lock stop passes through the side beam and is rotatably mounted. The end of the side beam... The door stop is equipped with an unlocking auxiliary device, which includes a locking lever. The locking lever is located near the inner wall of the side beam and is movably set to push the locking stop to tilt around its axis. The door stop is locked and limited by the cooperation between the locking stop and the first support. The locking stop can be rotated under the push of the locking lever to release the restriction on the door stop. Since the center of gravity of the door stop is close to one side of its top, it can automatically tilt under the influence of gravity without human control. The unlocking process can be achieved simply by pushing the locking stop. The operation is simple, convenient, and highly automated. Moreover, the locking stop is pushed by the locking lever, so there is no need for the operator to stand in front of the side door, which ensures high safety performance.

[0008] Preferably, a second support is fixedly provided on the outer side wall of the side beam. The second support is located on the side of the first support away from the lock. A support rib is fixedly provided at the bottom of the second support, which can improve the impact resistance of the second support and prevent the second support from falling off due to the impact force of the door stop rotating and leveling.

[0009] Preferably, the upper end of the door stop is provided with an inclined surface on the side away from the second support, and a counterweight unit is fixedly provided on the upper end of the door stop near the second support, so as to ensure that the door stop can automatically tilt and flatten towards the second support under the influence of gravity, without the need for manual operation.

[0010] Preferably, the lower end of the door stop is rotatably positioned above the first support, and a limit block is fixedly connected to the lower end of the door stop to restrict the position of the door stop's pivot, ensuring that the lower end of the door stop can be placed inside the first support and effectively locked and limited when the door stop is erected.

[0011] Preferably, a first vertically arranged slot is provided on the side beam, the first slot passes through the side beam, and the lock stop is rotatably arranged in the first slot. The lock stop includes a lock head and a lock handle. The lock head is fixedly arranged at one end of the lock handle, the center of gravity of the lock stop is located at the lock handle, the lock head is located on the outside of the side beam and close to the first support, and the lock handle is located on the inside of the side beam, which facilitates the control of the center of gravity position of the lock stop.

[0012] Preferably, a second slot is provided on the lower side of the side beam. The second slot is located below the locking block and is connected to the first slot. This not only facilitates the use of the push iron but also serves as an inspection port for the maintenance of the locking block and the push iron.

[0013] Preferably, the lock handle has a T-shaped structure, and a U-shaped push iron is fixed on the lock stop push rod. The push iron is located directly below the lock handle, which effectively improves the stability of the lock stop push rod pushing the lock stop.

[0014] Preferably, there are several push irons, which are spaced apart along the axial direction of the locking rod. The number of push irons is the same as the number of locking blocks, and each push iron corresponds to a locking block. A specified number of locking block actions can be controlled synchronously by a single locking rod, which can realize the synchronous unlocking of multiple side doors and greatly improve the unlocking efficiency.

[0015] This invention provides a locking control method, including an unlocking process, which involves controlling the movement of a lock stop push rod, using a push iron to push the lock handle upward, causing the lock head to move downward to a position lower than the first support, thereby releasing the lock stop from restricting the lower end of the door stop, and the door stop automatically tilting away from the lock stop due to gravity.

[0016] Preferably, the locking process also includes canceling the upward push of the pusher on the lock stop, the lock stop automatically resetting under the influence of gravity, raising the side door and pushing the door stop to rise, pushing the lock head downward during the process of raising the door stop, and when the door stop is fully raised, the limit block is located in the first support, and the lock stop automatically resetting under the influence of gravity.

[0017] As can be seen from the above technical solutions, the advantages of the present invention are:

[0018] 1. The center of gravity of the door stop is close to the top side of the door stop. The lock is located on one side of the first support to prevent the lower end of the door stop from rotating out of the first support. The lock can be rotated by the lock push rod to release the restriction on the door stop. Since the center of gravity of the door stop is close to the top side of its top, it can automatically tilt under the influence of gravity without human control. The unlocking process can be achieved by simply pushing the lock. The operation is simple and convenient, with a high degree of automation. Moreover, the lock is pushed by the lock push rod, so there is no need for the operator to stand in front of the side door, which ensures high safety performance.

[0019] 2. The locking lever drives the T-shaped lock handle through a U-shaped push iron, which makes the pushing more stable. Multiple push irons can be set to achieve synchronous driving of multiple locking stops, thereby realizing the synchronous unlocking of multiple side doors and greatly improving unlocking efficiency.

[0020] 3. The door stop can automatically reset under the action of gravity. The door stop locking process is simple. You only need to manually lift the door stop. There is no need for manual operation of the door stop, so the workload is small and the work efficiency is high. Attached Figure Description

[0021] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying 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.

[0022] Figure 1 This is a structural schematic diagram of the locking system of the present invention in the unlocked state according to one or more embodiments;

[0023] Figure 2 This is a schematic diagram of the locking system of the present invention in the locked state according to one or more embodiments;

[0024] Figure 3 This is a schematic diagram of the unlocking auxiliary device according to one or more embodiments of the present invention;

[0025] Figure 4 This is a schematic diagram of another structure of the unlocking assistance device according to one or more embodiments of the present invention;

[0026] The components represented by the various reference numerals in the diagram are:

[0027] 1. Side door; 2. Side beam; 3. Hinge; 4. Hinge seat; 5. First support; 6. Second support; 7. Mounting seat; 8. Door stop; 9. Lock stop; 10. End plate; 11. Lock stop push rod; 12. Push iron; 13. Handle; 14. Handwheel; 15. First slot; 16. Second slot; 17. Groove. Detailed Implementation

[0028] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0029] Example 1

[0030] In a typical embodiment of the present invention, such as Figures 1-4 As shown, a low-side door locking system is proposed, including: a side door assembly and a locking component.

[0031] The side door consists of a side door 1 and a side beam 2. A hinge seat 4 is fixedly installed on the outer side wall of the side beam 2. The side beam 2 is rotatably connected to the hinge seat 4 via a hinge 3. Specifically, the top of the hinge 3 is fixedly connected to the side door 1, and the bottom of the hinge 3 is rotatably connected to the hinge seat 4.

[0032] The locking assembly is installed on the outer side wall of the side door. The locking assembly includes a door stop 8 and a lock stop 9. Both the door stop 8 and the lock stop 9 are rotatably mounted on the side beam 2. A first support 5 and a second support 6 are fixedly provided on the outer side wall of the side beam 2. There are several second supports 6 for supporting the door stop 8, and one first support 5 for supporting the door stop 8 and cooperating with the lock stop 9 to limit the door stop 8.

[0033] Specifically, both the first support 5 and the second support 6 are U-shaped structures with openings at the top. The first support 5 and the second support 6 are sequentially spaced horizontally on the outer side wall of the side beam 2. The door stop 8 is rotatably mounted on the side beam 2 via a pivot. The upper end of the door stop 8 is a free end, and the lower end of the door stop 8 is rotatably mounted on the first support 5 around an pivot. Figure 2 As shown, when the door stop 8 is in the upright state, it is used to prevent the side door 1 from flipping over, thereby locking the side door 1.

[0034] The bottom of the second support 6 is welded with a support rib to improve the impact resistance of the second support 6 and prevent the second support 6 from falling off due to the impact force of the door stop 8 rotating and flattening.

[0035] The locking stop 9 is rotatably mounted on the side of the first support 5 away from the second support 6 and close to the lower end of the door stop 8. The upper end of the door stop 8 is provided with an inclined surface on the side away from the second support 6, and a counterweight unit, such as a counterweight block, is fixedly mounted on the side of the upper end of the door stop 8 close to the second support 6 by welding or other means. This makes the center of gravity of the entire door stop 8 located at its upper end close to the second support 6, so that the door stop 8 can automatically tilt and flatten towards the second support 6 under the influence of gravity without manual operation.

[0036] The lower end of the door stop 8 is rotatably positioned above the first support 5. Specifically, when the door stop 8 is in a vertical state, the lower end of the door stop 8 is located directly above the first support 5. When the door stop 8 is in a horizontal position, the lower end face of the door stop 8 and the side of the first support 5 closest to the first support 5 are in the same vertical plane.

[0037] The lower end of the door stop 8 is fixedly connected to a limit block by welding or other means. The limit block is made of channel steel, rectangular tube, round steel or other structures. When the door stop 8 is in a vertical state, the limit block is located inside the first support 5. With the use of the lock stop 9, it can limit the automatic tilting of the door stop 8. When the door stop 8 is in a horizontal position, the limit block is located above the first support 5.

[0038] Lock 9 is used to limit the door stop 8 to prevent it from tipping over automatically, such as... Figure 2 , Figure 3As shown, a first slot 15 is provided on the side beam 2. The first slot 15 is a vertically arranged elongated hole structure. The first slot 15 penetrates the side beam 2, and the lower end of the first slot 15 penetrates the lower side of the side beam 2. The lock stop 9 is movably disposed in the first slot 15. The lock stop 9 includes two parts: a lock head and a lock handle. The lock head is fixedly disposed on one end of the lock handle. The lock head and the lock handle together form an irregular structure, so that the overall center of gravity of the lock stop 9 is located at the lock handle. The lock stop 9 passes through the side beam 2. The lock head of the lock stop 9 is located on the outside of the side beam 2 and is close to the first support 5. It is used to limit the lower limit block of the door stop 8. The lock handle is located on the inside of the side beam 2 and is located below the floor of the carriage. It is used to control the pitching movement of the lock head.

[0039] Specifically, a mounting base 7 is fixedly provided on the inner wall of the side beam 2. The mounting base 7 is located at the first slot 15. The lock handle is rotatably mounted on the mounting base 7 via a rotating shaft. Since the overall center of gravity of the lock stop 9 is located at the lock handle, the lock head is tilted upward and close to the limiting block in the free state. The lock head then blocks and limits the limiting block to prevent the door stop 8 from tipping over automatically. When the door stop 8 needs to be tilted over, pushing the lock handle upward will cause the lock head to move downward to release the obstruction on one side of the first support 5, thereby releasing the restriction on the limiting block. The door stop 8 can tip over automatically under the influence of gravity. The unlocking process can be achieved simply by pushing the lock handle. The operation is simple, convenient, and highly automated.

[0040] The low-side door locking system also includes an unlocking auxiliary device, which includes an end plate 10. The end plate 10 is fixedly mounted on the side beam 2 by welding. The end plate 10 is located at the front and rear ends of the carriage. The end plate 10 is perpendicular to the side beam 2 and extends inward. A locking lever 11 is movably provided between the two end plates 10 to push the locking handle at the rear end of the locking lever 9. The operator does not need to stand in front of the side door 1 to operate the locking lever 9, which greatly improves the safety performance.

[0041] To facilitate the use of the locking push rod 11 and the locking handle, the locking handle is designed as a T-shaped structure in this embodiment, and a U-shaped push iron 12 is fixed on the locking push rod 11. The push iron 12 is located directly below the locking handle. The use of the push iron 12 and the locking handle together improves the stability of the locking push rod 11 in pushing the locking stop 9.

[0042] To improve efficiency, a number of push irons 12 are fixedly provided on the locking push rod 11. The push irons 12 are spaced apart along the axial direction of the locking push rod 11. The number of push irons 12 is the same as the number of locking blocks 9, and the positions of the push irons 12 and the locking blocks 9 correspond one-to-one, so that the action of a specified number of locking blocks 9 can be controlled synchronously by a locking push rod 11.

[0043] like Figure 3As shown, in order to avoid the lower side of the side beam 2 restricting the push iron 12, a second slot 16 is provided on the lower side of the side beam 2. The second slot 16 is located below the locking stop 9 and is connected to the first slot 15. This not only facilitates the use of the push iron 12, but also serves as an inspection port for the maintenance of the locking stop 9 and the push iron 12.

[0044] like Figure 3 As shown, the end plate 10 has a slot 17, which is an inverted L-shaped hole. The locking push rod 11 is movably disposed in the slot 17, and handles 13 are fixed at both ends of the push rod 11. The slot 17 is bent away from the side beam 2, so that when the lock handle is pushed by the push iron 12, the operator can lift the locking push rod 11 upward. When it is necessary to keep the lock handle in the raised state, the raised locking push rod 11 can be moved laterally. A baffle is also fixed on the locking push rod 11. The baffle contacts the inner wall of the end plate 10 to limit the axial movement of the locking push rod 11 and prevent the locking push rod 11 from being pulled out.

[0045] It is understandable that the locking lever 11 can be pushed by a telescopic structure such as a cylinder or an electric push rod, or by a handwheel drive. The specific drive method of the locking lever 11 can be determined according to actual needs, and no further restrictions are imposed here.

[0046] like Figure 4 As shown, the handwheel is driven by a handwheel 14 and a ratchet fixedly mounted on the locking push rod 11, and a pawl mounted on the end plate 10. The locking push rod 11 is rotatably mounted on the end plate 10 around an axis. The ratchet and pawl cooperate. The operator can drive the locking push rod 11 to rotate around an axis through the handwheel 14, which in turn drives the push iron 12 on the locking push rod 11 to rotate around an axis. During this process, the ratchet rotates synchronously and cooperates with the pawl. Since the ratchet structure cannot be reversed, after unlocking, the operator can stop turning the handwheel 14 to fix the unlocked state. When the operator continues to turn the handwheel, the push iron 12 on the locking push rod 11 exceeds the top and leaves the lock handle of the locking stop 9. The lock head of the locking stop 9 resets. If it is necessary to close the door, turn the handwheel one more turn to keep the locking stop 9 in the unlocked state, and then the door can be closed manually.

[0047] Example 2

[0048] In another typical embodiment of the present invention, a locking method is proposed, which employs the low-side door locking system mentioned in Embodiment 1, including an unlocking process and a locking process.

[0049] The unlocking process is as follows:

[0050] The operator manipulates the locking lever 11 to move, and uses the push iron 12 on the locking lever 11 to push the lock handle of the locking stop 9 upward, thereby causing the locking stop 9 to rotate around the axis. At the same time, the lock head moves downward to a position lower than the first support 5, so as to release the restriction of the locking stop 9 on the position of the lower limit block of the door stop 8. Correspondingly, the door stop 8 is automatically tilted away from the locking stop 9 under the influence of gravity, so as to be placed horizontally on the second support 6, thereby releasing the restriction of the door stop 8 on the side door 1 and completing the unlocking of the side door 1.

[0051] The operator can control the locking push rod 11 in two ways: one is to control the locking push rod 11 to move, thereby driving the push iron 12 to move and push the locking stop 9; the other is to control the locking push rod 11 to rotate around the axis, thereby driving the push iron 12 to rotate around the axis synchronously, and then using the push iron 12 to push the locking stop 9 to rotate around the axis.

[0052] The locking process is as follows:

[0053] The upward push of the pusher 12 on the lock stop 9 is canceled. The lock stop 9 automatically resets under the influence of gravity. At this time, the lock head is close to the first support 5. The operator raises the side door 1 that needs to be closed and manually pushes the door stop 8 to rise. During the process of raising the door stop 8, the lock head of the lock stop 9 will be pushed downward. When the door stop 8 is fully raised, the limiting block at the lower end of the door stop 8 is located in the first support 5 and no longer pushes the lock stop 9. The lock stop 9 automatically springs back to its original position under the influence of gravity. Then, the cooperation between the lock stop 9 and the first support 5 restricts the rotation of the door stop 8 around the axis, thus completing the door locking operation.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-side door locking system, comprising: A locking assembly installed on a side door assembly, the side door assembly including a side beam (2) and a side door (1) rotatably connected to the side beam (2), characterized in that the locking assembly includes a door stop (8) rotatably disposed on the side beam (2) and a lock stop (9), a first support (5) with an upper opening is fixedly provided on the outer side wall of the side beam (2), the upper end of the door stop (8) is a free end, the lower end of the door stop (8) is rotatably disposed on the first support (5) about an axis, when the door stop (8) is upright, the lower end of the door stop (8) is located inside the first support (5), the center of gravity of the door stop (8) is close to the side of the top of the door stop (8), and the lock stop (9) is located on one side of the first support (5) to restrict the lower end of the door stop (8) from rotating out of the first support (5), the lock stop (9) Passes through the side beam (2) and is rotatably set. An unlocking auxiliary device is installed at the end of the side beam (2). The unlocking auxiliary device includes a locking push rod (11). The locking push rod (11) is close to the inner wall of the side beam (2). The locking push rod (11) is movably set to push the locking stop (9) to pitch around the axis. A vertically set first slot (15) is opened on the side beam (2). The first slot (15) passes through the side beam (2). The locking stop (9) is rotatably set in the first slot (15). The locking stop (9) includes a lock head and a lock handle. The lock head is fixedly set at one end of the lock handle. The center of gravity of the locking stop (9) is located at the lock handle. The lock head is located on the outside of the side beam (2) and close to the first support (5). The lock handle is located on the inside of the side beam (2).

2. The low-side door locking system according to claim 1, characterized in that, A second support (6) is fixedly provided on the outer side wall of the side beam (2). The second support (6) is located on the side of the first support (5) away from the lock (9). A support rib is fixedly provided at the bottom of the second support (6).

3. The low-side door locking system according to claim 2, characterized in that, The upper end of the door stop (8) is provided with an inclined surface on the side away from the second support (6), and a counterweight unit is fixedly provided on the upper end of the door stop (8) near the second support (6).

4. The low-side door locking system according to claim 1, characterized in that, The lower end of the door stop (8) is rotatably positioned above the first support (5), and the lower end of the door stop (8) is fixedly connected to a limit block.

5. The low-side door locking system according to claim 1, characterized in that, The lower side of the side beam (2) is provided with a second slot (16), which is located below the locking stop (9) and is connected to the first slot (15).

6. The low-side door locking system according to claim 1, characterized in that, The lock handle has a T-shaped structure, and a U-shaped push iron (12) is fixed on the lock stop push rod (11). The push iron (12) is located directly below the lock handle.

7. The low-side door locking system according to claim 6, characterized in that, There are several push irons (12). The push irons (12) are spaced apart along the axial direction of the locking push rod (11). The number of push irons (12) is the same as that of the locking stop (9), and the push irons (12) and the locking stop (9) correspond one-to-one.

8. A locking method, characterized in that, The low-side door locking system as described in any one of claims 1-7 is adopted, including the unlocking process, controlling the movement of the lock stop push rod (11), using the push iron (12) to push the lock handle upward, so that the lock head moves downward to a position lower than the first support (5), releasing the lock stop (9) from restricting the lower end of the door stop (8), and the door stop (8) automatically tilts away from the lock stop (9) under the influence of gravity.

9. The locking method according to claim 8, characterized in that, It also includes the locking process, canceling the upward push of the push iron (12) on the lock block (9), the lock block (9) automatically resets under the influence of gravity, the side door (1) is erected, and the door stop (8) is pushed to stand up. During the process of the door stop (8) being erected, the lock head is pushed to move downward. When the door stop (8) is fully erected, the limit block is located in the first support (5), and the lock block (9) automatically resets under the influence of gravity.

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