Door lock anti-falling limiting structure and boxcar
By designing a door lock anti-release structure including mounting seat, push rod, elastic reset member and limit plate, the problem of door lock loss caused by violent vibration is solved, and a higher door lock locking effect is achieved. Train operation safety.
Patent Information
- Application Number
- CN202421203269.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In the prior art, the door lock loses its locking effect due to violent vibration during driving, causing the cargo to be thrown out of the car, reducing the safety of train operation.
Design a door lock anti-detachment limit structure, including a mounting base, push rod, elastic reset member and limit plate. The mounting seat is installed between the handle and the door, the push rod slides in the through hole, and the elastic reset member drives the push rod to move to the limit plate and contact the handle, restricting the door lock to the open state.
It effectively prevents the door lock from opening when the vehicle body vibrates violently, strengthens the locking effect of the door lock and ensures the safety of the train operation.
Smart Images
Figure CN222501359U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of railway vehicle accessories, and more specifically, to a door lock anti-drop limit structure and a boxcar. Background Art
[0002] A boxcar, also known as a covered wagon, is a closed railway carriage generally used to transport goods.
[0003] At present, each boxcar door is equipped with a door lock to prevent the door from opening; when locking the door, the staff first closes the door, and then inserts the lock tongue into the lock hole by rotating the handle, thereby restricting the door from opening.
[0004] The inventor discovered that during the travel of a boxcar, the bumpy road conditions would cause the car body to vibrate violently, causing the door locks to lose their locking effect, resulting in cargo being thrown out of the car, reducing the safety of the train operation. Utility Model Content
[0005] The purpose of the present application is to provide a door lock anti-disengagement limit structure and a boxcar to solve the technical problem in the prior art that severe vibration causes the door lock device to lose its locking effect, thereby reducing the safety of train operation.
[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a door lock anti-dropping limiting structure, the door lock comprises a lock tongue rotatably connected to the vehicle door, and a handle connected to the lock tongue and having a length direction perpendicular to the handle rotation axis; characterized in that it comprises:
[0007] A mounting seat, used for being mounted between the handle and the vehicle door; the mounting seat has a cavity, and a through hole communicating with the cavity is formed at one end of the mounting seat facing away from the vehicle door; and
[0008] A push rod is slidably inserted in the through hole, and its two ends are respectively located at the inner and outer sides of the chamber; one end of the push rod located in the chamber is connected to an elastic reset member, and the other end of the push rod located outside the chamber is connected to a limit plate;
[0009] Wherein, when the door lock is in a locked state, the elastic reset member can drive the push rod to move to the limit plate and connect with the handle to limit the door lock from switching to an open state.
[0010] Preferably, the push rod can rotate about the central axis of the through hole; the limit plate and the push rod are connected by a connecting plate extending radially outward from the push rod;
[0011] Wherein, when the door lock is in a locked state, the push rod can be rotated until the limit plate avoids the handle.
[0012] Preferably, the push rod can rotate about the central axis of the through hole; one end of the push rod in the chamber has a plurality of protrusions arranged at intervals along its circumference, and the chamber has a plurality of limiting grooves arranged around the through hole in one-to-one correspondence with the plurality of protrusions;
[0013] Wherein, when the elastic reset member drives the limiting plate to move toward the handle, each of the protrusions is inserted into the corresponding limiting groove to limit the rotation of the push rod.
[0014] Preferably, the mounting seat has an opening on a side facing the vehicle door, the opening being communicated with the interior of the chamber and being used for the elastic reset member and the push rod to pass through.
[0015] Preferably, the elastic return member is a conical coil spring; the axial direction of the conical coil spring is parallel to the axial direction of the push rod, and it has a large-diameter end and a small-diameter end; and the small-diameter end and the large-diameter end are respectively connected to the push rod and the inner wall of the chamber.
[0016] Preferably, one end of the push rod in the chamber has a groove for the small-diameter end to be embedded in.
[0017] Preferably, the push rod can rotate about the central axis of the through hole; a rotating member is provided in the groove, and the rotating member is connected to the small-diameter end;
[0018] Wherein, when the push rod rotates with the central axis of the through hole as the axis, the rotating member can rotate relative to the push rod.
[0019] Preferably, the mounting base has a plurality of positioning holes extending toward the vehicle door, and a fixing bolt is inserted into each of the positioning holes; when the mounting base is connected to the vehicle door, each of the fixing bolts is used to be threadedly connected to the vehicle door.
[0020] Preferably, the mounting base further comprises:
[0021] The reinforcing plate is used to be arranged on a side of the vehicle door facing away from the mounting seat, and is suitable for being threadedly connected with a plurality of the fixing bolts.
[0022] In the embodiment of the present application, during assembly, the push rod and the elastic return member are sequentially installed into the mounting seat, and a limit plate is installed at the end of the push rod extending out of the mounting seat, and finally the mounting seat is fixedly connected to the vehicle door; when the door lock is in a locked state, the limit plate can move toward the handle under the action of the elastic return member until it connects with the handle, so as to limit the opening of the handle, thereby limiting the door lock from switching to an open state; when the door lock needs to be opened, under the action of manpower, the limit plate is pushed in the vertical direction of the vehicle door to release the restriction on the handle, and the staff can rotate the handle to open the door lock; when the manpower is withdrawn, the push rod and the limit plate can be automatically reset under the action of the elastic return member.
[0023] Compared with the prior art, the door lock anti-disengagement limiting structure provided in the embodiment of the present application can effectively prevent the door lock from opening when the vehicle body vibrates violently, thereby enhancing the locking effect of the door lock and ensuring the safety of train operation.
[0024] The technical solution adopted in the present application also provides a boxcar, comprising a door lock anti-disengagement limiting structure proposed in any of the aforementioned items.
[0025] The beneficial effects of the boxcar provided by this embodiment are the same as the beneficial effects of the aforementioned door lock anti-disengagement limiting structure, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0027] Figure 1 Schematic diagram of the door lock anti-drop limit structure and door lock device provided in the embodiment of the present application Figure 1 ;
[0028] Figure 2 Schematic diagram of the door lock anti-drop limit structure and door lock device provided in the embodiment of the present application Figure 2 ;
[0029] Figure 3 A schematic diagram of the three-dimensional structure of the door lock anti-dropping limiting structure provided in an embodiment of the present application;
[0030] Figure 4 A schematic diagram of an exploded structure of a door lock anti-dropping limiting structure provided in an embodiment of the present application;
[0031] Figure 5 A schematic cross-sectional view of a door lock anti-dropping limiting structure provided in an embodiment of the present application;
[0032] Figure 6A schematic diagram of the three-dimensional structure of a push rod used in an embodiment of the present application;
[0033] Figure 7 A schematic cross-sectional structure diagram of a mounting base used in an embodiment of the present application;
[0034] Among them, the reference numerals in the figure are:
[0035] 1. Mounting seat; 11. Chamber; 12. Through hole; 13. Limiting groove; 14. Positioning hole; 15. Fixing bolt; 16. Reinforcement plate; 17. Opening; 2. Push rod; 21. Protrusion; 22. Groove; 23. Rotating part; 3. Elastic reset part; 4. Limiting plate; 41. Connecting plate; 5. Handle; 6. Door. DETAILED DESCRIPTION
[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0038] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application 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, and therefore should not be understood as a limitation on the present application.
[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0040] Please also read Figures 1 to 5The door lock anti-dropping limiting structure provided by the present application is now described. The door lock anti-dropping limiting structure, the door lock is a component of the railway freight boxcar door 6, the door lock includes a lock tongue rotatably connected to the door 6, and a handle 5 connected to the lock tongue, the length direction of which is perpendicular to the rotation axis of the handle 5. The staff can withdraw the lock tongue from the lock hole by rotating the handle 5, thereby switching the door lock to an open state; the door lock anti-dropping limiting structure includes a mounting seat 1 and a push rod 2.
[0041] The mounting base 1 is used to be installed between the handle 5 and the vehicle door 6 ; the mounting base 1 has a cavity 11 , and a through hole 12 communicating with the cavity 11 is formed at one end thereof facing away from the vehicle door 6 .
[0042] The push rod 2 is slidably inserted in the through hole 12, and its two ends are respectively located at the inner and outer sides of the chamber 11; the end of the push rod 2 located in the chamber 11 is connected to the elastic reset member 3, and the end of the push rod 2 located outside the chamber 11 is connected to the limit plate 4, and the limit plate 4 is fixedly connected to the push rod 2.
[0043] Among them, when the door lock is in a locked state, the elastic reset member 3 can drive the push rod 2 to move to the limit plate 4 and connect with the handle 5 to limit the door lock from switching to an open state; when the door lock needs to be opened, under the action of manpower, the limit plate 4 is pushed in the vertical direction of the door panel until the limit plate 4 is away from the handle 5 to release the restriction of the limit plate 4 on the handle 5.
[0044] In the embodiment of the present application, during assembly, the push rod 2 and the elastic reset member 3 are sequentially installed into the mounting seat 1, and the limit plate 4 is installed at the end of the push rod 2 extending out of the mounting seat 1, and finally the mounting seat 1 is fixedly connected to the vehicle door 6; when the door lock is in a locked state, the limit plate 4 can move toward the handle 5 under the action of the elastic reset member 3 until it connects with the handle 5, so as to limit the opening of the handle 5, thereby limiting the door lock from switching to an open state; when the door lock needs to be opened, under the action of manpower, the limit plate 4 is pushed in the vertical direction toward the vehicle door 6 to release the restriction on the handle 5, and the staff can rotate the handle 5 to open the door lock; when the manpower is withdrawn, the push rod 2 and the limit plate 4 can be automatically reset under the action of the elastic reset member 3.
[0045] Compared with the prior art, the door lock anti-disengagement limiting structure provided in the embodiment of the present application can effectively prevent the door lock from opening when the vehicle body vibrates violently, thereby enhancing the locking effect of the door lock and ensuring the safety of train operation.
[0046] In some embodiments, please refer to Figures 1 to 5 As a specific embodiment of the door lock anti-disengagement limiting structure provided in the present application, the push rod 2 can rotate around the central axis of the through hole 12; the limiting plate 4 and the push rod 2 are connected by a connecting plate 41 extending radially outward along the push rod 2.
[0047] When the door lock is in a locked state, the push rod 2 can rotate until the limit plate 4 avoids the handle 5.
[0048] By adopting the above technical solution, when the vehicle door 6 needs to be opened, the limiting plate 4 is pushed in the vertical direction of the door panel under the action of manpower, and the limiting plate 4 is rotated counterclockwise to release the limiting effect of the limiting plate 4 on the handle 5.
[0049] In some embodiments, please refer to Figure 4 and Figure 5 As a specific embodiment of the door lock anti-disengagement limiting structure provided in the present application, the push rod 2 can rotate around the central axis of the through hole 12; one end of the push rod 2 in the chamber 11 has a plurality of protrusions 21 arranged at intervals along its circumference, and the chamber 11 has a plurality of limiting grooves 13 arranged around the through hole 12 and corresponding to the plurality of protrusions 21 one by one.
[0050] When the elastic reset member 3 drives the limiting plate 4 to move toward the handle 5 , each protrusion 21 is inserted into the corresponding limiting groove 13 to limit the rotation of the push rod 2 .
[0051] By adopting the above technical solution, it can be achieved that the limiting plate 4 will not rotate relative to the mounting seat 1, and the handle 5 is limited from falling off due to the vibration of the vehicle body.
[0052] When the door 6 needs to be opened, the limit plate 4 is pushed in the vertical direction of the door panel under the action of manpower, so that each protrusion 21 withdraws from the corresponding limit groove 13 to release the rotation restriction of the push rod 2. At this time, when the limit plate 4 is rotated to bypass the rotation path of the handle 5, the limiting effect on the handle 5 can be released.
[0053] Similarly, after closing the door 6 and the door lock, the limit plate 4 is pushed vertically to the door panel under the action of manpower, and when the limit plate 4 is rotated to the upper side of the handle 5, the manpower is withdrawn, and the push rod 2 and the limit plate 4 move toward the handle 5 under the action of the elastic reset member 3. At this time, each protrusion 21 is inserted into the corresponding limit groove 13, thereby limiting the rotation of the push rod 2 and the limit plate 4.
[0054] In some embodiments, see Figure 5 As a specific embodiment of the door lock anti-disengagement limiting structure provided in the present application, the side of the mounting seat 1 facing the vehicle door 6 has an opening 17 that is connected to the inside of the chamber 11 and is used for the elastic reset member 3 and the push rod 2 to pass through.
[0055] By adopting the above technical solution, the mounting seat 1 has an opening 17, so that during maintenance, the staff can easily take out the push rod 2 and the elastic reset member 3 from the opening 17, thereby completing maintenance operations such as replacing the push rod 2 and the elastic reset member 3 inside the mounting seat 1.
[0056] In some embodiments, see Figure 5 As a specific implementation of the door lock anti-disengagement limiting structure provided by the present application, the elastic reset member 3 is a conical coil spring; the axial direction of the conical coil spring is parallel to the axial direction of the push rod 2, and it has a large-diameter end and a small-diameter end; and the small-diameter end and the large-diameter end are respectively connected to the push rod 2 and the inner wall of the chamber 11; the limiting structure adopts a built-in pre-stressed spring, which effectively avoids the problem of mechanism failure due to rain and snow erosion.
[0057] By adopting the above technical solution, the small diameter end of the spring structure has a centripetal property of being offset toward the center of the large diameter end, so that the spring is easier to compress and stretch, and is not prone to offset during the compression and extension process.
[0058] In addition, the conical helical spring has the advantages of compact structure, light weight, fatigue resistance and long life. It can reduce the load on the structure while maintaining sufficient strength and is not prone to failure and other problems.
[0059] In some embodiments, please refer to Figure 5 and Figure 6 As a specific implementation of the door lock anti-disengagement limiting structure provided in the present application, one end of the push rod 2 in the chamber 11 has a groove 22 for the small-diameter end to be embedded.
[0060] By adopting the above technical solution, the groove 22 makes it difficult for the conical coil spring to deviate and bend during compression and extension; when the small diameter end of the conical coil spring is embedded in the groove 22, the conical coil spring is coaxially arranged with the chamber 11, and there is a gap between the conical coil spring and the inner wall of the chamber 11. This arrangement avoids the conical coil spring from scratching the inner wall of the chamber 11, thereby improving the service life of the limiting structure of the present application.
[0061] In some embodiments, see Figure 5 and Figure 6 As a specific implementation of the door lock anti-disengagement limiting structure provided in the present application, the push rod 2 can rotate around the central axis of the through hole 12; a rotating member 23 is provided in the groove 22, and the rotating member 23 is connected to the small-diameter end.
[0062] When the push rod 2 rotates around the central axis of the through hole 12 , the rotating member 23 can rotate relative to the push rod 2 ; the rotating member 23 can be a bearing or a turntable.
[0063] By adopting the above technical solution, the push rod 2 and the conical coil spring will not be in direct contact. When the push rod 2 rotates around the central axis of the through hole 12, no rotational friction will be generated between the push rod 2 and the conical coil spring, thereby preventing the push rod 2 from causing the conical coil spring to twist and deform during rotation, thereby affecting the stability of the conical coil spring.
[0064] In some embodiments, please refer to Figures 1 to 4 As a specific implementation of the door lock anti-disengagement limiting structure provided in the present application, the mounting base 1 has a plurality of positioning holes 14 extending toward the vehicle door 6, and a fixing bolt 15 is inserted into each positioning hole 14; when the mounting base 1 is connected to the vehicle door 6, each fixing bolt 15 is used to be threadedly connected to the vehicle door 6.
[0065] By adopting the above technical solution, it is convenient for the staff to inspect and repair the limiting structure. During the inspection and repair, it is only necessary to remove a plurality of fixing bolts 15 to complete the inspection and repair operations such as disassembly or replacement of the mounting seat 1.
[0066] In some embodiments, please refer to Figure 1 and Figure 2 As a specific implementation of the door lock anti-disengagement limiting structure provided in the present application, the mounting seat 1 also includes a reinforcement plate 16.
[0067] The reinforcing plate 16 is used to be arranged on a side of the vehicle door 6 facing away from the mounting seat 1 , and is suitable for being threadedly connected with a plurality of fixing bolts 15 .
[0068] Since the door 6 panel is usually thin, bolt connection of thin panels is not reliable enough, by adopting the above technical solution, the mounting base 1 is connected with the door 6 and the reinforcement plate 16 by fixing bolts 15, so that the mounting base 1 and the reinforcement plate 16 cooperate to clamp the door 6, thereby improving the installation stability of the mounting base 1.
[0069] The technical solution adopted in the present application also provides a boxcar, comprising a door lock anti-disengagement limiting structure proposed in any of the aforementioned items.
[0070] The beneficial effects of the boxcar provided by this embodiment are the same as the beneficial effects of the aforementioned door lock anti-disengagement limiting structure, which will not be repeated here.
[0071] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A door lock anti-drop limiter structure, the door lock comprising a lock tongue rotatably connected to the vehicle door, and a handle connected to the lock tongue and having a length direction perpendicular to the handle rotation axis; characterized in that: include: A mounting seat, used for being mounted between the handle and the vehicle door; the mounting seat has a cavity, and a through hole communicating with the cavity is formed at one end of the mounting seat facing away from the vehicle door; and A push rod is slidably inserted in the through hole, and its two ends are respectively located at the inner and outer sides of the chamber; one end of the push rod located in the chamber is connected to an elastic reset member, and the other end of the push rod located outside the chamber is connected to a limit plate; Wherein, when the door lock is in a locked state, the elastic reset member can drive the push rod to move to the limit plate and connect with the handle to limit the door lock from switching to an open state.
2. The door lock anti-dropping limiting structure according to claim 1, characterized in that: The push rod can rotate about the central axis of the through hole; the limit plate and the push rod are connected by a connecting plate extending radially outward from the push rod; Wherein, when the door lock is in a locked state, the push rod can be rotated until the limit plate avoids the handle.
3. The door lock anti-dropping limiting structure according to claim 1 or 2, characterized in that: The push rod can rotate around the central axis of the through hole; one end of the push rod in the chamber has a plurality of protrusions arranged at intervals along its circumference, and the chamber has a plurality of limiting grooves arranged around the through hole in one-to-one correspondence with the plurality of protrusions; Wherein, when the elastic reset member drives the limiting plate to move toward the handle, each of the protrusions is inserted into the corresponding limiting groove to limit the rotation of the push rod.
4. The door lock anti-dropping limiting structure according to claim 1, characterized in that: The side of the mounting seat facing the vehicle door has an opening which is communicated with the interior of the chamber and is used for the elastic reset member and the push rod to pass through.
5. The door lock anti-dropping limiting structure according to claim 1, characterized in that: The elastic reset member is a conical helical spring; the axial direction of the conical helical spring is parallel to the axial direction of the push rod, and the conical helical spring has a large-diameter end and a small-diameter end; and the small-diameter end and the large-diameter end are respectively connected to the push rod and the inner wall of the chamber.
6. The door lock anti-dropping limiting structure according to claim 5, characterized in that: One end of the push rod in the chamber has a groove for the small-diameter end to be embedded in.
7. The door lock anti-dropping limiting structure according to claim 6, characterized in that: The push rod can rotate with the central axis of the through hole as the axis; a rotating member is arranged in the groove, and the rotating member is connected to the small-diameter end; Wherein, when the push rod rotates with the central axis of the through hole as the axis, the rotating member can rotate relative to the push rod.
8. The door lock anti-dropping limiting structure according to claim 1, characterized in that: The mounting seat is provided with a plurality of positioning holes penetrating toward the vehicle door, and a fixing bolt is inserted into each of the positioning holes; when the mounting seat is connected to the vehicle door, each of the fixing bolts is used for threaded connection with the vehicle door.
9. The door lock anti-dropping limiting structure according to claim 8, characterized in that: The mounting base also includes: The reinforcing plate is used to be arranged on a side of the vehicle door facing away from the mounting seat, and is suitable for being threadedly connected with a plurality of the fixing bolts.
10. A boxcar, characterized in that The invention comprises the door lock anti-dropping limiting structure according to any one of claims 1 to 9.