Integrated opening and closing mechanism for boxcar sliding plug door, boxcar sliding plug door and boxcar

Abstract

The invention discloses a boxcar sliding plug door integrated opening and closing mechanism, a boxcar sliding plug door and a boxcar, and belongs to the technical field of boxcars. The integrated opening and closing mechanism for the boxcar sliding plug door is used for being connected with a door lock and a crank throw of the sliding plug door. The integrated opening and closing mechanism for the boxcar sliding plug door comprises a mechanism base; the handle is rotationally arranged on the mechanism base; the first end of the first connecting rod is rotationally connected to the handle, and the second end of the first connecting rod is configured to be connected with one end of the door lock; the transmission mechanism is connected with the handle; and the first end of the second connecting rod is rotationally connected to the transmission mechanism, and the second end of the second connecting rod is configured to be connected with one end of the crank throw. According to the integrated opening and closing mechanism for the boxcar sliding plug door, the boxcar sliding plug door and the boxcar, the sliding plug door can be conveniently opened and closed.

Description

Technical Field

[0001] The present application belongs to the technical field of boxcars, and in particular relates to an integrated opening and closing mechanism for a boxcar plug-sliding door, a boxcar plug-sliding door, and a boxcar. Background Art

[0002] A boxcar is a railway freight car with side walls, end walls, a floor and a roof. It is mainly used to transport goods that are afraid of sun and rain. The door structure of its side walls is generally in the form of plug doors to facilitate loading and unloading of goods.

[0003] Usually, the plug door is equipped with a door opening and closing mechanism and a door locking mechanism, which are used for opening and closing the door and locking and unlocking the door respectively. In addition, due to the large size and weight of the door, two people are often required to cooperate in the opening and closing of the plug door, respectively performing the door opening and closing operations and the door unlocking and locking operations; this makes the operation of the plug door inconvenient and inefficient. Summary of the invention

[0004] The present application provides an integrated opening and closing mechanism for a boxcar plug sliding door, a boxcar plug sliding door and a boxcar, aiming to at least to some extent solve the technical problems that the opening and closing operation of the boxcar plug sliding door requires the cooperation of multiple people, the operation is inconvenient and the efficiency is not ideal.

[0005] In one aspect of an embodiment of the present application, an integrated opening and closing mechanism for a boxcar plug door is provided, which is used to respectively connect a door lock and a crank of the plug door; the mechanism comprises:

[0006] Mechanism base;

[0007] A handle rotatably disposed on the mechanism base;

[0008] A first connecting rod, a first end of which is rotatably connected to the handle, and a second end of the first connecting rod is configured to be connected to one end of the door lock;

[0009] A transmission mechanism connected to the handle;

[0010] A second connecting rod has a first end rotatably connected to the transmission mechanism, and a second end of the second connecting rod is configured to be connected to one end of the crank.

[0011] In some embodiments, the transmission mechanism comprises:

[0012] A transmission gear connected to the handle, wherein the rotation center axis of the transmission gear coincides with the rotation center axis of the handle;

[0013] A transmission gear is pivotally connected in the middle to the mechanism base, a first end of the transmission gear is meshed with the transmission gear, and a second end of the transmission gear is rotationally connected to the first end of the second connecting rod.

[0014] In some embodiments, the transmission mechanism further comprises:

[0015] A transmission connecting rod is movably arranged on the mechanism base, and one end of the transmission connecting rod is rotatably connected to the second end of the transmission gear;

[0016] A transmission cam is pivotally connected to the mechanism base, and a first end of the transmission cam is rotationally connected to the second end of the transmission connecting rod, and a second end of the transmission cam is rotationally connected to the first end of the second connecting rod.

[0017] In some embodiments, the angle between the pivot center of the transmission cam and the line connecting the two ends of the transmission cam is an obtuse angle.

[0018] In some embodiments, there are two transmission cams, and the second end of each transmission cam is connected to a second connecting rod.

[0019] In some embodiments, the included angle between the pivot center of the transmission gear and the line connecting the two ends of the transmission gear is an obtuse angle.

[0020] In some embodiments, the number of the first connecting rods is two, and the two first connecting rods are rotatably connected to two sides of the handle respectively, so that during the rotation of the handle, the two first connecting rods approach or move away from the handle.

[0021] In another aspect of the embodiment of the present application, a boxcar plug sliding door is provided, comprising: a door frame, a door body, a door lock, a crank, and the boxcar plug sliding door integrated opening and closing mechanism;

[0022] The door body is movably connected to the door frame, and the mechanism base is arranged on the door body;

[0023] The door lock is connected to the door body and the door frame respectively, and the door lock is connected to the first connecting rod, so that when the handle is rotated, the first connecting rod drives the door lock to lock the door body in the door frame, or unlock the door body from the door frame;

[0024] One end of the crank is rotatably connected to the door frame, and the other end is rotatably connected to the door body through a rotating shaft, and the rotating shaft is connected to the second connecting rod, so that when the handle is rotated, the second connecting rod drives the rotating shaft to rotate, thereby pushing the door body into the door frame, or pulling the door body out of the door frame.

[0025] In some embodiments, the door locks and the cranks are respectively provided in two groups, and the two groups of door locks and the two groups of cranks are respectively provided on both sides of the door body.

[0026] In another aspect of the embodiments of the present application, a boxcar is disclosed, including the boxcar plug door.

[0027] The embodiments of the present application have at least the following beneficial effects:

[0028] The embodiments of the present application provide an integrated opening and closing mechanism for a boxcar plug-in door, a boxcar plug-in door and a boxcar, comprising a mechanism base, a handle, a first connecting rod, a transmission mechanism and a second connecting rod. The handle is rotatably arranged on the mechanism base and is respectively connected to the first connecting rod and the transmission mechanism, the second connecting rod is connected to the transmission mechanism, and the first connecting rod and the second connecting rod are respectively configured to connect a door lock and a crank of the plug-in door, so that the door lock and the crank can be driven in an orderly manner by rotating the handle to achieve the locking and opening of the plug-in door, thereby greatly simplifying the locking and opening and closing operations of the plug-in door, and it can be operated by one person, which improves the convenience and efficiency of operation to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A structural schematic diagram of an integrated opening and closing mechanism for a boxcar plug sliding door in an embodiment of the present application is shown;

[0031] Figure 2 Shows Figure 1 A schematic diagram of the structure of the transmission mechanism of the integrated opening and closing mechanism of the boxcar plug sliding door;

[0032] Figure 3 Shows Figure 2 A schematic diagram of the structure of the transmission gear of the transmission mechanism;

[0033] Figure 4 Shows Figure 2 A schematic structural diagram of a transmission connecting rod of a transmission mechanism in FIG.

[0034] Figure 5 Shows Figure 2 Schematic diagram of the structure of the transmission cam of the transmission mechanism.

[0035] Reference numerals:

[0036] 1-mechanism base, 2-handle, 3-first connecting rod, 4-transmission mechanism, 41-transmission gear, 42-transmission gear, 421-engaging tooth end, 422-transmission end, 43-transmission connecting rod, 44-transmission cam, 5-second connecting rod, 6-door lock, 61-lock head, 62-sleeve, 7-crank, 71-rotating shaft. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0039] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0040] The door body of the boxcar plug door needs to be moved along the set track to the corresponding position of the door frame, and then embedded in the door frame along the door thickness direction to achieve the door closing operation, and then the door lock needs to be operated to lock the door body in the door frame; the door opening process can be operated in the opposite direction. Correspondingly, a crank and a door lock are connected between the door body and the door frame to respectively realize the moving support of the door body and the locking and unlocking of the door body. Usually, during the process of opening and closing the door body, two people are required to cooperate to implement the door lock and crank operation, which is inconvenient and inefficient.

[0041] To this end, the present application provides an integrated opening and closing mechanism for a boxcar plug door, a boxcar plug door and a boxcar, aiming to solve to a certain extent the technical problems that the opening and closing operation of the boxcar plug door requires the cooperation of multiple people, the operation is inconvenient and the efficiency is not ideal.

[0042] See also Figure 1 and Figure 2 In some embodiments, the integrated opening and closing mechanism of the boxcar plug door is used to orderly operate the door lock 6 and the crank 7 of the plug door, so that a single person can operate it to realize the opening, closing, locking and unlocking operations of the door body, thereby improving the convenience and efficiency of operation.

[0043] Specifically, the integrated opening and closing mechanism of the boxcar plug sliding door comprises a mechanism base 1, a handle 2, a first connecting rod 3, a transmission mechanism 4 and a second connecting rod 5. The handle 2 is rotatably arranged on the mechanism base 1, the first connecting rod 3 and the transmission mechanism 4 are movably connected to the handle 2 respectively, and the second connecting rod 5 is movably connected to the transmission mechanism 4.

[0044] Among them, the mechanism base 1 is the basis of the integrated opening and closing mechanism of the boxcar plug door, which can be installed on the door body of the plug door and use the door body of the plug door as the basis for force operation.

[0045] The handle 2 is rotatably connected to the mechanism base 1, and serves as the main body for performing door opening, closing, locking and unlocking operations. The operator can output the driving torque by rotating the handle 2, which is finally transmitted to the door lock 6 and the crank 7 of the Sierra door, thereby driving the door lock 6 and the crank 7 to operate and realize the door opening, closing, locking and unlocking.

[0046] The first connecting rod 3 is configured as a driving member of the door lock 6, and the two ends of the first connecting rod 3 are respectively rotatably connected to the handle 2 and the door lock 6, and the first end of the first connecting rod 3 is rotatably connected to the circumferential side of the handle 2, so that when the handle 2 rotates, the first connecting rod 3 is pulled to move along a set trajectory; that is, by rotating the handle 2, the first connecting rod 3 is pushed and pulled to move roughly along the length direction of the first connecting rod 3, thereby driving the door lock 6 to open or lock.

[0047] The transmission mechanism 4 and the second connecting rod 5 are configured as driving parts of the crank 7, and the transmission mechanism 4 is connected to the handle 2. The two ends of the second connecting rod 5 are respectively rotatably connected to the transmission mechanism 4 and the crank 7, so that when the handle 2 is rotated, the second connecting rod 5 is pulled to move along the set trajectory through the transmission mechanism 4; that is, by rotating the handle 2, the direction of the driving torque is converted through the transmission mechanism 4, and the second connecting rod 5 is pushed and pulled to move approximately along the length direction of the second connecting rod 5, thereby driving the crank 7 to move and drive the Sierra door to close or open.

[0048] The integrated opening and closing mechanism for the boxcar Sierra door provided in the embodiment of the present application takes the mechanism base as the force basis and is provided with a rotatable handle for respectively driving the first connecting rod, the transmission mechanism and the second connecting rod, and the first connecting rod and the second connecting rod are respectively configured to connect the door lock and the crank of the Sierra door, so that the door lock and the crank can be driven in an orderly manner by rotating the handle to achieve the locking and opening of the Sierra door, thereby greatly simplifying the locking and opening and closing operations of the Sierra door, and it can be operated by one person, which improves the convenience and efficiency of operation to a certain extent.

[0049] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the transmission mechanism 4 is used to convert the torque of the handle 2 into a driving torque, and transmit it to the second connecting rod 5, so as to push and pull the second connecting rod 5 to reciprocate approximately along its axial direction.

[0050] Specifically, the transmission mechanism 4 may include: a transmission gear 41 and a transmission gear 42; the transmission gear 41 is connected to the handle 2, and the rotation center axis of the transmission gear 41 coincides with the rotation center axis of the handle 2, so that the transmission gear 41 rotates synchronously with the handle 2.

[0051] The middle part of the transmission gear 42 is pivotally connected to the mechanism base 1, and the first end of the transmission gear 42 is configured as an engaging tooth end 421, and the engaging tooth end 421 is engaged with the transmission gear 41, and the second end of the transmission gear 42 is configured as a transmission end 422, and the transmission end 422 is directly or indirectly connected to one end of the second connecting rod 5.

[0052] Therefore, when the handle 2 is rotated, the transmission gear 41 pushes the first end 421 of the transmission gear 42 to deflect, and correspondingly, the second end 422 of the transmission gear 42 deflects in the opposite direction to drive the second connecting rod 5 to move back and forth along the set specifications to drive the crank 7 to move, embed the door body of the sliding door into the door frame or pull the door body out of the door frame.

[0053] It is worth noting that the position and movement trajectory of the first connecting rod 3 are matched with the positions of the door lock 6 and the handle 2 to meet the requirements that the first connecting rod 3 transmits the torque of the handle 2 and converts and drives the door lock 2 to move.

[0054] In some embodiments, in order to ensure the reliability and stability of the opening, closing and locking of the Sierra door, the crank 7 and the door lock 6 are usually arranged at vertical intervals on the edge of the door body of the Sierra door and maintain a certain distance; at the same time, considering that the handle 2 drives the first connecting rod 3 and the second connecting rod 5 respectively, in order to avoid interference between the first connecting rod 3 and the second connecting rod 5, the first connecting rod 3 and the second connecting rod 5 can be arranged roughly in parallel and maintain a certain distance.

[0055] To this end, the transmission mechanism 4 may also include a transmission link 43 and a transmission cam 44, the middle part of the transmission cam 44 is pivotally connected to the mechanism base 1, the two ends of the transmission link 43 are respectively rotatably connected to the second end of the transmission gear 42 and the first end of the transmission cam 44, the second end of the transmission cam 44 is rotatably connected to the first end of the second link 5, and the torque transmission path is extended by the transmission link 43 and the transmission cam 44, and the flexibility of the position arrangement of the second link 5 can be increased to a certain extent, the distance between the second link 5 and the first link 3 is maintained, and a roughly flat arrangement can be achieved.

[0056] It is worth mentioning that, by rotating the transmission gear 42, the transmission cam 44 and the transmission connecting rod 43, the rotation trajectory and the linear trajectory can be connected, the transmission direction can be flexibly set, and the axial movement of the second connecting rod 5 can be controlled in a smaller space, taking into account a smaller installation space and a larger transmission angle.

[0057] In some embodiments, the first link 3 and the second link 5 are arranged approximately in parallel along the width direction of the door body of the sliding door, that is, the axial directions of the first link 3 and the second link 5 are arranged approximately in the transverse direction; the handle 2 of the first link 3 is arranged at the first end of the first link 3 and is pivotally connected to the circumferential side of the handle 2, so that when the handle 2 rotates, it can pull the first link 3 to move back and forth approximately along its axial direction.

[0058] The second connecting rod 5 is arranged below the first connecting rod 3, and the transmission gear 42, the transmission connecting rod 43 and the transmission cam 44 are arranged in the height direction of the sliding door, that is, vertically below the handle 2. In addition, when the transmission gear 42 rotates, the transmission connecting rod 43 is pushed and pulled vertically to move, thereby driving the transmission cam 44 to deflect, and then pulling the second connecting rod 5 laterally to reciprocate approximately along its axial direction.

[0059] In some embodiments, the first connecting rod 3 and the second connecting rod 5 can be two in number, respectively, for driving two groups of the door locks 6 and two groups of the cranks 7 respectively.

[0060] Generally speaking, the two first connecting rods 3 can be arranged on both sides of the handle 2. The number of the transmission cam 44 and the number of the second connecting rod 5 can also be two, which are arranged on both sides of the transmission connecting rod 43.

[0061] In some embodiments, the angle between the pivot center of the transmission gear 42 and the line connecting the two ends of the transmission gear 42 is an obtuse angle, that is, the transmission gear 42 is roughly V-shaped, which can reduce the specifications of the transmission gear 42 to a certain extent, reduce the occupied space, and the space required for the rotation process.

[0062] Similarly, the angle between the pivot center of the transmission cam 44 and the line connecting the two ends of the transmission cam 44 is an obtuse angle, that is, the transmission cam 44 is roughly V-shaped, which can reduce the specifications of the transmission cam 44 to a certain extent, reduce the occupied space, and the space required for the rotation process.

[0063] In some embodiments, the transmission connecting rod 43 can be configured as a plate-shaped member with a certain width, with a top pivotally connected to the second end of the transmission gear 42 , and two bottom corner areas pivotally connected to the transmission cam 44 , respectively.

[0064] In some embodiments, a boxcar plug door based on the above-mentioned integrated opening and closing mechanism is also provided, and specifically includes a door lock 6, a crank 7, a door frame and a door body; the door body is movably connected to the door frame and can be matched, embedded in or detached from the door frame.

[0065] The mechanism base 1 is arranged on the door body, so that the handle 2 is operated with the door body as the force application basis.

[0066] The door lock 6 is connected between the door body and the door frame, and the door lock 6 is connected to the first connecting rod 3, so that when the handle 2 rotates, the first connecting rod 3 drives the door lock 6 to lock the door body in the door frame, or unlock the door body from the door frame.

[0067] One end of the crank 7 is rotatably connected to the door frame, and the other end is rotatably connected to the door body through a shaft 71, and the shaft 71 is connected to the second connecting rod 5, so that when the handle 2 rotates, the second connecting rod 5 drives the shaft 71 to rotate, so as to push the door body into the door frame, or pull the door body out of the door frame.

[0068] In some embodiments, both ends of the rotating shaft 71 are connected to the crank 7, which improves the convenience of the door body 9 being inserted into or removed from the door frame to a certain extent.

[0069] In some embodiments, the door lock 6 may include a lock head 61, a sleeve 62 and a lock sleeve, the lock head 61 is arranged on the sleeve 62, the sleeve is sleeved on the rotating shaft 71, and the sleeve 62 is rotatably connected to the second end of the first connecting rod 3; the lock sleeve is arranged on the door frame, so that when the first connecting rod 3 pushes and pulls the sleeve 62 to rotate, it can be embedded in or disengaged from the lock sleeve to achieve locking and unlocking.

[0070] In some embodiments, the door locks 6 and the cranks 7 are respectively divided into two groups and are arranged on two side areas in the width direction of the door body.

[0071] In some embodiments, a boxcar is also provided, comprising the boxcar plug door described above.

[0072] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0073] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0074] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0075] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features 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.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0078] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0079] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An integrated opening and closing mechanism for a boxcar plug door, used to connect the door lock and crank of the plug door respectively; characterized in that: include: Mechanism base; A handle rotatably disposed on the mechanism base; A first connecting rod, a first end of which is rotatably connected to the handle, and a second end of the first connecting rod is configured to be connected to one end of the door lock; A transmission mechanism connected to the handle; A second connecting rod has a first end rotatably connected to the transmission mechanism, and a second end of the second connecting rod is configured to be connected to one end of the crank.

2. The integrated opening and closing mechanism for the boxcar plug door as claimed in claim 1, characterized in that: The transmission mechanism comprises: A transmission gear connected to the handle, wherein the rotation center axis of the transmission gear coincides with the rotation center axis of the handle; A transmission gear is pivotally connected in the middle to the mechanism base, a first end of the transmission gear is meshed with the transmission gear, and a second end of the transmission gear is rotationally connected to the first end of the second connecting rod.

3. The integrated opening and closing mechanism for the boxcar plug door as claimed in claim 2, characterized in that: The transmission mechanism also includes: A transmission connecting rod is movably arranged on the mechanism base, and one end of the transmission connecting rod is rotatably connected to the second end of the transmission gear; A transmission cam is pivotally connected to the mechanism base, and a first end of the transmission cam is rotationally connected to the second end of the transmission connecting rod, and a second end of the transmission cam is rotationally connected to the first end of the second connecting rod.

4. The integrated opening and closing mechanism for the boxcar plug door as claimed in claim 3, characterized in that: The included angle between the pivot center of the transmission cam and the line connecting the two ends of the transmission cam is an obtuse angle.

5. The integrated opening and closing mechanism for the boxcar plug door as claimed in claim 3, characterized in that: There are two transmission cams, and the second end of each transmission cam is connected to the second connecting rod.

6. The integrated opening and closing mechanism for the boxcar plug door as claimed in claim 2, characterized in that: The included angle between the pivot center of the transmission gear and the line connecting the two ends of the transmission gear is an obtuse angle.

7. The integrated opening and closing mechanism for a boxcar plug door according to any one of claims 1 to 6, characterized in that: There are two first connecting rods, and the two first connecting rods are rotatably connected to both sides of the handle respectively, so that during the rotation of the handle, the two first connecting rods approach or move away from the handle.

8. A boxcar plug door, characterized in that: include: A door frame, a door body, a door lock, a crank, and an integrated opening and closing mechanism for a boxcar plug door as claimed in any one of claims 1 to 7; The door body is movably connected to the door frame, and the mechanism base is arranged on the door body; The door lock is connected to the door body and the door frame respectively, and the door lock is connected to the first connecting rod, so that when the handle is rotated, the first connecting rod drives the door lock to lock the door body in the door frame, or unlock the door body from the door frame; One end of the crank is rotatably connected to the door frame, and the other end is rotatably connected to the door body through a rotating shaft, and the rotating shaft is connected to the second connecting rod, so that when the handle is rotated, the second connecting rod drives the rotating shaft to rotate, thereby pushing the door body into the door frame, or pulling the door body out of the door frame.

9. The boxcar plug door as claimed in claim 8, characterized in that: The door locks and the cranks are respectively provided in two groups, and the two groups of door locks and the two groups of cranks are respectively arranged on both sides of the door body.

10. A boxcar, characterized in that: Including the boxcar plug door as described in claim 8 or 9.

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