A lower door spinning type locking device

Abstract

This invention discloses a bottom door rotary locking device, including a snap-lock fixing device and a rotating handle device. The snap-lock fixing device consists of a fixing base, an eyelet bolt, and a snap-lock. The rotating handle device consists of a handle connecting rod, an L-shaped handle, and a stop. The locking device of this invention adopts a spiral clamping structure with a self-locking function, ensuring that the bottom door cannot open on its own after closing. The eyelet bolt structure allows the snap-lock to be released completely by rotating the handle when opening the door. A certain distance exists between the L-shaped handle and the eyelet bolt, serving as a rotating lever arm for easy operation and sufficient clamping force after closing, preventing loosening. The eyelet bolt uses a fully threaded structure, ensuring sufficient travel for the snap-lock and compensating for dimensional errors caused by deformation, ensuring that all bottom doors can be fully closed and clamped. The stop structure of the rotating handle device restricts the rotation of the handle base, ensuring that the locking device does not operate during operation and preventing accidental opening.

Description

Technical Field

[0001] This invention belongs to the field of railway freight car component design technology, and more particularly to the field of railway freight car door opening and closing component design technology, specifically relating to a lower door rotary locking device. Background Technology

[0002] Railway open wagons are mainly used for transporting goods such as coal, ore, building materials, and machinery. Most railway open wagons are equipped with a top-hinged lower side door, whose locking device mainly uses a latch seat and a latching iron assembly. The working principle is that the hinge, which is fixed to the lower side door, is first placed into the latch seat, and then the latching iron is rotated into the slot of the latch seat, so that it presses the hinge tightly to achieve the purpose of locking.

[0003] With the use of vehicles, wear and tear on the fasteners and latches, as well as vibrations during vehicle operation, can easily cause the fasteners to jump out of the latches, resulting in abnormal opening of the lower door, causing serious malfunctions such as cargo spillage and vehicle intrusion into the clearance zone, posing a significant safety hazard to driving safety. Summary of the Invention

[0004] This invention discloses a bottom-side door rotary locking device. The purpose of this invention is to provide a safer, more reliable, and more convenient and labor-saving bottom-side door rotary locking device that can effectively prevent misoperation.

[0005] This invention is achieved through the following technical solution:

[0006] A lower side door rotary locking device, fixedly installed on the side beam of a railway freight car body, characterized in that it includes a snap-locking device and a rotating handle device;

[0007] The snap fastening device consists of a fixing seat, an eyelet bolt, and a snap fastener. The fixing seat is fixed to the side beam of the vehicle body by fixing bolts, and the surface of the fixing seat is provided with two parallel through-hole lifting lugs. The annular hole end of the eyelet bolt is hinged to the lifting lug by a round pin and can rotate around the round pin. The thread of the eyelet bolt is a fully threaded structure. The snap fastener is a groove-shaped stop block with the groove opening facing the vehicle body and the center passing through and fixing the eyelet bolt.

[0008] The rotary handle device consists of a handle connecting rod, an L-shaped handle, and a stop. One end of the handle connecting rod has a threaded hole that connects to the eye bolt thread and is installed on the outside of the buckle. The other end of the handle connecting rod has a U-shaped opening. The L-shaped handle is an L-shaped operating rod. The L-shaped connecting node has a through hole and is installed between the upper and lower arms of the U-shaped opening through a rotating shaft bolt. A torsion spring is installed on the rotating shaft bolt to drive the L-shaped handle to return to its original position. The stop is a U-shaped structure that is installed and fixed on the side beam of the vehicle body. When the L-shaped handle is closed, one end is located in the U-shaped groove.

[0009] Furthermore, the end of the eye ring bolt is provided with an internal thread, and the retaining ring is fixed to the end by a locking screw.

[0010] Furthermore, the mounting bracket is fixed to the side beam of the vehicle body by three sets of fixing bolts, nuts, and washers.

[0011] Furthermore, the L-shaped handle consists of a handle shaft one and a handle shaft two that are perpendicularly connected and fixed to each other. The vertical connection node is provided with a through hole and is installed between the upper and lower arms of the U-shaped opening through a rotating shaft bolt. A stop block is fixed at the root of the handle shaft two. One end of the torsion spring fitted on the rotating shaft bolt is engaged with the handle connecting rod for limiting and fixing, and the other end is engaged with the stop block to drive the L-shaped handle to reset.

[0012] Furthermore, the stop block fixed at the root of the second handle shaft is a long strip structure. The upper and lower ends of the long strip rotate and limit the movement along the outer side of the upper and lower arms of the U-shaped opening of the handle connecting rod, so as to realize the L-shaped handle rotating 90 degrees in the U-shaped opening.

[0013] Furthermore, the eye bolt has a fully threaded external structure, and the snap fastener can be adjusted within the full thread travel.

[0014] Furthermore, the eye bolt can rotate around the fixed base, and when the door is opened, the buckle can be completely disengaged from the hinge through the rotation of the eye bolt.

[0015] The working principle of the lower door rotary locking device of this invention is as follows: The fixing seat of the buckle fixing device is fixed to the side beam of the vehicle body by bolts or rivets. The eye bolt is connected to the fixing seat by a round pin and can rotate around the round pin on the fixing seat. The buckle has a groove-shaped structure with a round hole drilled in the middle. It passes through the eye bolt during assembly and fits against the lower door hinge during operation. One end of the handle connection has a threaded hole, and the other end has a U-shaped groove. The threaded hole end mates with the threaded part of the eye bolt. Through the thread, the rotational motion of the rotating handle device can be converted into axial motion, pushing the buckle to press the lower door hinge. A retaining ring is installed at the end of the eye bolt and is fixed by screws to prevent the handle connecting rod and buckle from falling off. An L-shaped handle is assembled at the U-shaped opening end of the handle connecting rod. The L-shaped handle consists of two mutually perpendicular handle shafts. A torsion spring is assembled between the L-shaped handle and the handle connecting rod. Under the action of the torsion spring, when the handle is in working state, one shaft is inside the stop, and its movement is restricted by the stop fixed on the side beam of the vehicle body.

[0016] The advantages of this invention include:

[0017] The locking device of this invention adopts a spiral pressing structure, which has a self-locking function to ensure that the lower door cannot be opened by itself after it is closed.

[0018] In the locking device of this invention, there is a certain distance between the L-shaped handle and the eye bolt, which provides a certain rotational lever arm. The operation is simple and easy, and there is sufficient clamping force after the door is closed, making it difficult to loosen.

[0019] The locking device of this invention adopts a threaded clamping structure, and the eye bolt adopts a fully threaded structure to ensure that the clamp has sufficient travel, which can compensate for the dimensional errors caused by deformation during the manufacturing, installation and use of the lower door, and ensure that all lower doors can be completely closed and clamped.

[0020] The locking device of this invention employs a stop structure in its rotating handle mechanism, which restricts the rotation of the handle seat and ensures that the locking device does not operate during operation, thus preventing the lower door from being accidentally opened.

[0021] The clamping structure of this invention adopts an eyelet bolt structure. When the door is opened, the clamp is loosened by rotating the handle. The eyelet bolt can rotate around the fixed seat. By rotating the eyelet bolt, the clamp can be completely disengaged from the hinge, avoiding damage to the locking device when the door is opened and improving its service life. Attached Figure Description

[0022] Figure 1 This is an axonometric view of the locking device of the present invention;

[0023] Figure 2 This is a cross-sectional view of the locking device of the present invention in its working position;

[0024] Figure 3 This is an isometric view of the rotary handle device;

[0025] Figure 4 This is a side view of the L-shaped handle;

[0026] Figure 5 This is a schematic diagram of the L-shaped handle in operation;

[0027] Figure 6 This is a schematic diagram of the locking device of the present invention in the open state;

[0028] Figure 7 This is a schematic diagram of the adjustable snap fastener of the present invention;

[0029] Figure 8 This is a schematic diagram of the eye ring bolt of the present invention.

[0030] In the diagram, 1 is the snap fastener fixing device, 1.1 is the fixing seat, 1.2 is the eye bolt, 1.3 is the snap fastener, 1.4 is the retaining ring, 1.5 is the locking screw, 1.6 is the round pin, 1.7 is the lifting lug, and 1.8 is the fixing bolt; 2 is the rotating handle device, 2.1 is the handle connecting rod, 2.2 is the L-shaped handle, 2.3 is the torsion spring, 2.4 is the rotating shaft bolt, and 2.5 is the stop; 2.1.1 is the threaded hole, 2.1.2 is the U-shaped opening, 2.2.1 is the handle shaft one, 2.2.2 is the handle shaft two, and 2.2.3 is the stop block; 4 is the hinge, L1 is the working position of the L-shaped handle, L2 is the operating position of the L-shaped handle, and H is the adjustable range of the snap fastener. Detailed Implementation

[0031] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principles of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the scope of protection of the present invention.

[0032] Refer to the attached diagram.

[0033] As shown in the figure, the rotary locking device of the present invention consists of a rotary handle device 2 and a fixed buckle device 1. During operation, the rotational motion of the rotary handle device 2 is converted into the axial motion of the buckle 1.3, thereby locking the lower door hinge 4. This structure has a self-locking function, ensuring the lower door is closed.

[0034] The fixing buckle device 1 includes a fixing seat 1.1 and an eye bolt 1.2. The fixing seat 1.1 is provided with a lifting lug 1.7. The eye bolt 1.2 is fixed by a round pin 1.6. The eye bolt 1.2 can rotate around the round pin 1.6. Through this rotation, the lower door hinge 4 is disengaged from the locking device.

[0035] The rotary handle device 2 includes a handle connecting rod 2.1 and an L-shaped handle 2.2. One end of the handle connecting rod 2.1 has a U-shaped opening 2.1.2. After the door is closed, one end of the L-shaped handle 2.2 is hidden inside the U-shaped opening 2.1.2 to prevent accidental operation. The L-shaped handle 2.2 is a vertical structure composed of two handle shafts in two directions. A stop 2.2.3 with a torsion spring 2.3 is installed at the root of one handle shaft. During operation, the L-shaped handle 2.2 can rotate around a fixed pivot bolt 2.4. It acts as an operating handle when opening and closing the door, and after the door is closed, it is limited and prevented from detaching between the stop 2.5 and the U-shaped opening 2.1.2. A torsion spring 2.3 is fitted onto the L-shaped handle 2.2 and the pivot bolt 2.4 of the handle connecting rod 2.1. In the non-operating state, the torsion spring 2.3 keeps one end of the handle shaft of the L-shaped handle 2.2 within the opening of the stop 2.5 to prevent accidental operation of the device. The L-shaped handle 2.2 is a certain distance from the eye bolt 1.2, which provides a certain lever arm during operation and reduces the operating force.

[0036] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the locking device mainly consists of a snap-locking device 1 and a rotating handle device 2.

[0037] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the snap fastener 1 consists of a fixing base 1.1, an eye bolt 1.2, a snap fastener 1.3, a retaining ring 1.4, a locking screw 1.5, a round pin 1.6, and a bolt 1.8.

[0038] The mounting base 1.1 is fixed to the side beam of the vehicle body by bolts 1.8 and fasteners such as nuts and washers, and is fixed to the side frame of the vehicle body at three points. The mounting base 1.1 is provided with a lug 1.7 through which a round pin can pass. The eye bolt 1.2 is hinged to the lug 1.7 of the mounting base 1.1 by a round pin 1.6 and can rotate around the round pin 1.6. The threaded part of the eye bolt 1.2 is a fully threaded structure, which increases the adjustment range of the device. The snap fastener 1.3 is made into a groove shape with the opening facing the vehicle body and the eye bolt 1.2 passing through the middle. The end of the eye bolt 1.2 is provided with internal threads, and the retaining ring 1.4 is fixed to the end by a locking screw 1.5 to prevent the handle device and the snap fastener 1.3 from coming off during operation and vehicle movement.

[0039] like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the rotating handle device 2 consists of a handle connecting rod 2.1, an L-shaped handle 2.2, a torsion spring 2.3, a stop 2.5, and a rotating shaft bolt 2.4.

[0040] One end of the handle connecting rod 2.1 has a threaded hole 2.1.1, which mates with the eyelet bolt 1.2. The handle connecting rod 2.1 is installed on the outside of the snap fastener 1.3 and can rotate around the eyelet bolt 1.2, enabling the axial movement of the snap fastener 1.3 and thus pressing the snap fastener 1.3 against the lower door hinge 4. The other end of the handle connecting rod 2.1 has a U-shaped opening 2.1.2. An L-shaped handle 2.2 is installed in the U-shaped opening 2.1.2 of the handle connecting rod 2.1 via a pivot bolt 2.4. A torsion spring 2.3 is installed between the L-shaped handle 2.2 and the handle connecting rod 2.1, and a stop 2.5 is installed at a suitable position on the vehicle body.

[0041] The L-shaped handle 2.2 consists of two mutually perpendicular handle shafts, 2.2.1 and 2.2.2. A stop 2.2.3 is provided at the base of handle shaft 2.2.2 to engage the torsion spring 2.3. Under the action of the torsion spring 2.3, in the working state, handle shaft 2.2.1 is within the U-shaped opening 2.1.2 of handle linkage 2.1, preventing accidental rotation of handle linkage 2.1. Handle shaft 2.2.2 is within the opening of stop 2.5, which limits the movement of handle shaft 2.2.2, thus ensuring that the rotating handle device 2 will not malfunction during vehicle operation and keeping the lower door closed.

[0042] When opening and closing the door, rotate the L-shaped handle 2.2 so that the handle shaft 2.2.2 is inside the handle seat U-shaped opening 2.1.2, and the handle shaft 1 2.2.1 rotates to the outside of the vehicle body. The operable handle shaft 1 2.2.1 causes the rotating handle device 2 to rotate around the eye bolt 1.2, thereby realizing the lateral movement of the buckle 1.3 and realizing the door opening and closing operation.

[0043] The opening operation process of the lower side door rotary locking device of the present invention is as follows: rotate the L-shaped handle 2.2 to disengage the handle shaft 2.2.2 from the stop 2.5, operate the handle shaft 2.2.1 to rotate the handle connecting rod 2.1 around the eye bolt 1.2, and move the handle connecting rod 2.1 away from the lower side door hinge 4 by threading. Move the buckle 1.3 to disengage the lower side door hinge 4, rotate the eye bolt 1.2 downward to disengage the locking device from the lower side door hinge 4, and open the lower side door.

[0044] The closing operation of the lower door rotary locking device of this invention is as follows: With the locking device disengaged, close the lower door, rotate the eye bolt 1.2 upwards until the screw is perpendicular to the lower door hinge 4, push the buckle 1.3 to engage with the lower door hinge 4, rotate the handle connecting rod 2.1 through the handle shaft 2.2.1, and the handle connecting rod 2.1 will press the buckle 1.3 through the thread, so that the buckle 1.3 and the lower door hinge 4 are fully engaged. When the handle connecting rod 2.1 is rotated to the horizontal, release the L-shaped handle 2.2. Under the action of the torsion spring 2.3, the handle shaft 2.2.2 will move to the stop 2.5, and the stop 2.5 will restrict its movement, thus completing the closing of the door.

Claims

1. A lower side door rotary locking device, fixedly installed on the side beam of a railway freight car body, characterized in that: Includes a snap-fit ​​fixing device and a rotating handle device; The snap fastening device consists of a fixing seat, an eyelet bolt, and a snap fastener. The fixing seat is fixed to the side beam of the vehicle body by fixing bolts, and the surface of the fixing seat is provided with two parallel through-hole lifting lugs. The annular hole end of the eyelet bolt is hinged to the lifting lug by a round pin and can rotate around the round pin. The thread of the eyelet bolt is a fully threaded structure. The snap fastener is a groove-shaped stop block with the groove opening facing the vehicle body and the center passing through and fixing the eyelet bolt. The rotary handle device consists of a handle connecting rod, an L-shaped handle, and a stop. One end of the handle connecting rod has a threaded hole that connects to the eye bolt thread and is installed on the outside of the buckle. The other end of the handle connecting rod has a U-shaped opening. The L-shaped handle is an L-shaped operating rod. The L-shaped connecting node has a through hole and is installed between the upper and lower arms of the U-shaped opening through a rotating shaft bolt. A torsion spring is installed on the rotating shaft bolt to drive the L-shaped handle to return to its original position. The stop is a U-shaped structure that is installed and fixed on the side beam of the vehicle body. When the L-shaped handle is closed, one end is located in the U-shaped groove. The L-shaped handle consists of a handle shaft one and a handle shaft two that are perpendicularly connected and fixed to each other. The perpendicular connection node is provided with a through hole and is installed between the upper and lower arms of the U-shaped opening through a rotating shaft bolt. A stop block is fixed at the root of the handle shaft two. One end of a torsion spring fitted on the rotating shaft bolt is engaged with the handle connecting rod for limiting and fixing, and the other end is engaged with the stop block to drive the L-shaped handle to reset. The stop block fixed at the root of the handle shaft two is a long strip structure. The upper and lower ends of the long strip rotate and limit along the outer side of the upper and lower arms of the U-shaped opening of the handle connecting rod, so as to realize that the L-shaped handle can rotate 90 degrees in the U-shaped opening.

2. The underswing door spin-latch closure of claim 1, wherein: The end of the eye ring bolt is provided with an internal thread, and the retaining ring is fixed to the end by a locking screw.

3. The lower door rotary locking device according to claim 1, characterized in that: The mounting base is fixed to the side beam of the vehicle body by three sets of fixing bolts, nuts, and washers.

4. The lower door rotary locking device according to claim 1, characterized in that: The eye bolt can rotate around the fixed base. When the door is opened, the buckle can be completely disengaged from the hinge by rotating the eye bolt.

5. The lower door rotary locking device according to claim 1, characterized in that: The eye bolt has a full thread on the outside, and the working position of the snap fastener can be adjusted within the full thread range.

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