Tail end connecting structure of container self-loading and unloading device

Abstract

The tail end connecting structure of the container self-loading and unloading device comprises a fixing plate, an alignment plate and a pin shaft, the pin shaft is fixedly connected with the alignment plate and rotatably penetrates through the fixing plate, and the tail end connecting structure of the container self-loading and unloading device further comprises a pressing plate used for limiting free rotation of the alignment plate; an adjusting stud is arranged on the pressing plate, the end of the adjusting stud abuts against the fixing plate to generate adjustable friction torque, the friction torque enables the alignment plate and the fixing plate to keep relatively static when not subjected to external force, and relative rotation is achieved when the external force is larger than the friction torque. The adjustable friction torque is generated through threaded fit of the adjusting stud and the pressing plate, a pure mechanical state conversion mechanism of static friction self-locking-external force triggering rotation is formed by combining a pressing plate-pin shaft rigid transmission structure, automatic angle keeping of the alignment plate before container connection and self-adaptive rotation in operation are achieved, the loading and unloading efficiency is improved, and the labor intensity of workers is lowered. The problem of repeated manual intervention caused by free rotation of an existing device is solved, and the operation reliability and convenience of equipment under complex working conditions are remarkably improved.

Description

Technical Field

[0001] This invention relates to container self-loading and unloading, and more particularly to an end connection structure of a container self-loading and unloading device. Background Technology

[0002] With the increasing demands for efficiency in container logistics, container self-loading and unloading devices have become key equipment in modern transportation systems. Existing container self-loading and unloading devices are typically mounted on a general-purpose vehicle chassis. They connect to the container via two pins at the end of the device, inserting them into two oblong corner fitting holes on the top of the container. To ensure that the pins at the end of the device simultaneously and automatically reach the corresponding spatial positions of the corner fitting holes on both sides of the container, a rotational mechanism between the alignment plate and the fixed plate at the end of the boom is often used for position adjustment to accommodate angular deviations in the container caused by uneven ground or vehicle misalignment. However, the alignment plate rotation mechanism in such devices lacks effective constraint. During the initial connection phase, operators must manually maintain the alignment plate angle; otherwise, the alignment plate will freely deflect due to its own weight or vibration, preventing the pins from accurately inserting into the container corner fitting holes. This problem forces operators to repeatedly adjust the equipment's posture, severely restricting loading and unloading efficiency. Furthermore, under harsh working conditions, the increased difficulty of manual intervention leads to safety hazards, becoming a bottleneck restricting the development of container self-loading and unloading technology. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide an end connection structure for a container self-loading and unloading device that has a self-locking rotation damping function, does not require manual angle maintenance, and can adaptively trigger rotation.

[0004] Technical solution: The end connection structure of the container self-loading and unloading device of the present invention includes a fixed plate, an alignment plate, and a pin. The pin is fixedly connected to the alignment plate and rotatably passes through the fixed plate. It also includes a pressure plate for restricting the free rotation of the alignment plate. The pressure plate is provided with an adjusting stud. The end of the adjusting stud abuts against the fixed plate to generate an adjustable frictional torque. The frictional torque keeps the alignment plate and the fixed plate relatively stationary when no external force is applied, and allows them to rotate relative to each other when the external force is greater than the frictional torque.

[0005] Preferably, the pressure plate has a non-circular countersunk hole; the pin has a protrusion; the countersunk hole and the protrusion cooperate to restrict the relative rotation of the pressure plate and the pin.

[0006] Preferably, the pressure plate is further provided with an anti-loosening mechanism, which includes a connecting bolt and an anti-rotation plate; the pressure plate is provided with a through hole; the pin is provided with a connecting hole; the threaded part of the connecting bolt passes through the through hole and the connecting hole to thread the pressure plate and the pin; the anti-rotation plate is fixed on the pressure plate and its central polygonal hole mates with the head of the connecting bolt.

[0007] Preferably, the anti-rotation plate is fixed to the pressure plate by small screws.

[0008] Preferably, a washer is provided between the small screw and the anti-rotation plate.

[0009] Preferably, the alignment plate includes a straight plate and an L-shaped plate, the vertical surface of the L-shaped plate is provided with a container corner fitting plane, and the pin shaft passes vertically through the straight plate and is welded to it.

[0010] Preferably, the pressure plate is a bent plate structure.

[0011] Preferably, the fixing plate is fixedly connected to the end of the telescopic arm, and the pin is engaged with the corner fitting hole of the container.

[0012] Preferably, the end of the adjusting stud is provided with a replaceable friction block, and the adjusting stud is provided with a locking nut.

[0013] Preferably, the depth of the non-circular countersunk hole is greater than the height of the protrusion, forming an axial clearance compensation space to solve the jamming problem caused by thermal expansion and contraction or wear.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: By adjusting the threaded engagement between the stud and the pressure plate to generate an adjustable frictional torque, and combined with the rigid transmission structure of the pressure plate-pin shaft, a purely mechanical state conversion mechanism of "static friction self-locking - external force triggered rotation" is formed, realizing the automatic maintenance of the alignment plate angle before container connection and adaptive rotation during operation. This not only improves loading and unloading efficiency, but also solves the problem of repeated manual intervention caused by free rotation in existing devices, significantly improving the operational reliability and convenience of the equipment under complex working conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the end connection structure in this invention.

[0016] Figure 2 This is an exploded view of the end connection structure in this invention.

[0017] Figure 3 This is a schematic diagram of the installation of the end connection structure and the container self-loading and unloading device in this invention.

[0018] Figure 4 This is a schematic diagram of the alignment plate and pin structure in this invention.

[0019] Figure 5 This is a schematic diagram of the pressure plate structure in this invention.

[0020] Figure 6 This is a schematic diagram of the anti-rotation plate structure in this invention. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 6 As shown, the end connection structure of a container self-loading and unloading device in this embodiment consists of a fixing plate 1, an alignment plate 2, a pin 3, a pressure plate 4, and an adjusting stud 5. The fixing plate 1 is fastened to the end of the telescopic arm 11 by bolts, and a circular through hole is opened in its center for the pin 3 to pass through. The alignment plate 2 consists of a straight plate 21 and a vertically welded L-shaped plate 22. The vertical surface of the L-shaped plate 22 is machined with a flat container corner fitting surface. The pin 3 mates with the corner fitting holes of the container. The pin 3 is vertically welded to the center of the straight plate 21, and its shaft body is clearance-fitted with the through hole of the fixing plate 1 to achieve rotational freedom. The end of the pin 3 is provided with a protrusion 31 and a threaded connection hole 32.

[0023] The pressure plate 4 is manufactured using a bending forming process. Its main body has a non-circular countersunk hole 41 and a through hole 42. During installation, the protrusion 31 of the pin 3 is embedded into the non-circular countersunk hole 41 of the pressure plate 4, and the cross-sectional shapes of the two match to prevent relative rotation. The connecting bolt 6 passes through the through hole 42 of the pressure plate 4 and is screwed into the connecting hole 32 of the pin 3, fixing the pressure plate 4 and the pin 3 together as synchronously rotating bodies. The anti-rotation plate 7 is pressed and fixed to the surface of the pressure plate 4 by a small screw 8. The hexagonal hole in the center of the anti-rotation plate 7 engages with the hexagonal head of the connecting bolt 6. A washer 9 is installed between the small screw 8 and the anti-rotation plate 7 to distribute the preload.

[0024] The adjusting stud 5 is screwed into the threaded hole on the pressure plate 4, and a replaceable friction block is installed at its end. A locking nut 10 is provided on the adjusting stud 5. By rotating the adjusting stud 5, its extension length is changed, causing the friction block to press against the surface of the fixed plate 1 with controllable pressure, thereby generating an adjustable static friction torque. This friction torque keeps the alignment plate 2 and the fixed plate 1 relatively stationary when no external force is applied, and allows them to rotate relative to each other when the external force exceeds the friction torque. The depth of the non-circular countersunk hole 41 is designed to be greater than the height of the protrusion 31, forming an axial clearance compensation space to accommodate thermal deformation or wear allowance.

[0025] Its working principle is as follows: When initially connecting the container, the operator adjusts the telescopic arm to bring the L-shaped plate 22 close to the container corner fittings. At this time, the frictional torque generated by the adjusting stud 5 keeps the alignment plate 2 and the fixed plate 1 relatively stationary, preventing the alignment plate 2 from deflecting due to gravity or vibration, and ensuring that the pin 3 is accurately inserted into the corner fitting holes of the container. When the container hoisting starts, the torque generated by the container's gravity exceeds the set frictional torque value, and the pin 3 drives the pressure plate 4 to rotate smoothly relative to the fixed plate 1.

Claims

1. An end connection structure for a container self-loading and unloading device, comprising a fixing plate (1), an alignment plate (2), and a pin (3), wherein the pin (3) is fixedly connected to the alignment plate (2) and rotatably passes through the fixing plate (1), characterized in that: It also includes a pressure plate (4) for restricting the free rotation of the alignment plate (2); the pressure plate (4) is provided with an adjusting stud (5), the end of the adjusting stud (5) abuts against the fixed plate (1) to generate an adjustable frictional torque, the frictional torque makes the alignment plate (2) and the fixed plate (1) remain relatively stationary when no external force is applied, and achieve relative rotation when the external force is greater than the frictional torque.

2. The end connection structure according to claim 1, characterized in that: The pressure plate (4) is provided with a non-circular countersunk hole (41); the pin (3) is provided with a protrusion (31); the non-circular countersunk hole (41) and the protrusion (31) cooperate to restrict the relative rotation of the pressure plate (4) and the pin (3).

3. The end connection structure according to claim 1, characterized in that: The pressure plate (4) is also provided with an anti-loosening mechanism, which includes a connecting bolt (6) and an anti-rotation plate (7); the pressure plate (4) is provided with a through hole (42); the pin (3) is provided with a connecting hole (32); the threaded part of the connecting bolt (6) passes through the through hole (42) and the connecting hole (32) to thread the pressure plate (4) and the pin (3); the anti-rotation plate (7) is fixed on the pressure plate (4) and the polygonal hole in its center mates with the head of the connecting bolt (6).

4. The end connection structure according to claim 3, characterized in that: The anti-rotation plate (7) is fixed to the pressure plate (4) by small screws (8).

5. The end connection structure according to claim 4, characterized in that: A washer (9) is also provided between the small screw (8) and the anti-rotation plate (7).

6. The end connection structure according to claim 1, characterized in that: The alignment plate (2) includes a straight plate (21) and an L-shaped plate (22). The vertical surface of the L-shaped plate (22) is provided with a container corner fitting plane. The pin (3) passes vertically through the straight plate (21) and is welded to it.

7. The end connection structure according to claim 1, characterized in that: The pressure plate (4) is a bent plate structure.

8. The end connection structure according to claim 1, characterized in that: The fixing plate (1) is fixedly connected to the end of the telescopic arm (11), and the pin (3) is engaged with the corner hole of the container.

9. The end connection structure according to claim 1, characterized in that: The end of the adjusting stud (5) is provided with a replaceable friction block, and the adjusting stud (5) is provided with a locking nut (10).

10. The end connection structure according to claim 2, characterized in that: The depth of the non-circular countersunk hole (41) is greater than the height of the protrusion (31), forming an axial clearance compensation space.

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