A mechanical self-locking latch mechanism for a ship's roll-on / roll-off equipment locking device

Abstract

The present invention provides a mechanical self-locking latch mechanism for a ship roll-on / roll-off equipment locking device, comprising a bracket, a hydraulic oil cylinder, a stopper, a bendable connecting rod mechanism and a latch, wherein the bracket comprises an L-shaped plate and two side plates, wherein the two side plates are arranged on both sides of the L-shaped plate in a mirror-symmetrical manner and are fixedly connected to the L-shaped plate; the central axis of the hydraulic oil cylinder is arranged to be tilted downward relative to the vertical plate, and the cylinder shaft of the hydraulic oil cylinder is telescopic between the two side plates; the latch is placed at the lower part between the two side plates and is arranged parallel to the horizontal plate in the L-shaped plate, the upper end of the bendable connecting rod mechanism is rotatably connected to the two side plates through a pin shaft, the lower end is rotatably connected to one end of the latch near the vertical plate, the free end of the cylinder shaft of the hydraulic oil cylinder is connected between the two ends of the bendable connecting rod mechanism, and the stopper is located between the two side plates. With the mechanical self-locking latch mechanism of the present invention, even if the oil cylinder fails unexpectedly, the latch still cannot be pushed back, thereby avoiding causing the locking device to lose effectiveness and ensuring navigation safety.

Description

Technical Field

[0001] The invention belongs to the technical field of ship roll-on / roll-off equipment, and in particular relates to a mechanical self-locking latch mechanism used for a locking device of ship roll-on / roll-off equipment. Background Art

[0002] Ro-ro equipment is a crucial outfitting equipment in a car ro-ro ship. According to different locations and usage requirements, it can be divided into stern doors, side doors, bow doors, movable ramps and movable decks. In a ro-ro ship, there are a large number of ro-ro equipment to achieve rapid loading of vehicles at different areas of the dock and inside the ship, and improve vehicle loading and unloading efficiency. During the voyage of the ship, the stern door, side door, bow door and other ro-ro equipment need to be fixed to the hull structure with a locking device to maintain the tightness requirements of the equipment and the hull structure and ensure navigation safety.

[0003] In the prior art, the locking device of the roll-on / roll-off equipment is usually driven by a motor or a hydraulic cylinder. Although it has a locking function, once the cylinder fails and cannot be used, the locking effectiveness of the device on the roll-on / roll-off equipment will rapidly decrease, affecting the normal locking of the roll-on / roll-off equipment and threatening the safety of the ship. Summary of the invention

[0004] In view of the above problems, the present invention provides a mechanical self-locking latch mechanism for a locking device of a ship roll-on / roll-off equipment.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A mechanical self-locking latch mechanism for a ship roll-on / roll-off equipment locking device comprises a bracket, a hydraulic cylinder, a stop block, a bendable connecting rod mechanism and a latch, wherein the bracket comprises an L-shaped plate and two side plates, the two side plates are arranged at both sides of the L-shaped plate in a mirror-symmetrical manner and are fixedly connected to the L-shaped plate; one end of the hydraulic cylinder away from the cylinder shaft is rotatably connected to the upper end of the side where the vertical plate and the horizontal plate of the L-shaped plate are connected, the central axis of the hydraulic cylinder is arranged to be inclined downward relative to the vertical plate, and the cylinder shaft of the hydraulic cylinder is extended and retracted between the two side plates; the latch is placed at the lower part between the two side plates and is arranged parallel to the horizontal plate in the L-shaped plate The upper end of the bendable connecting rod mechanism is rotatably connected to the two side plates through a pin shaft, the lower end of the bendable connecting rod mechanism is rotatably connected to an end of the latch near the vertical plate, the free end of the hydraulic cylinder shaft is connected to the two ends of the bendable connecting rod mechanism, the stop block is located between the two side plates, and is fixedly connected to the two side plates for blocking the part between the upper end of the bendable connecting rod rod and the connection point between the upper end of the bendable connecting rod rod and the hydraulic cylinder shaft. The bendable connecting rod mechanism is driven to bend by the extension and retraction of the hydraulic cylinder shaft, and the free end of the latch is driven to extend and extend between the two side plates to achieve locking and unlocking.

[0007] Furthermore, the bendable link mechanism includes a first link, a second link and a third link connected in sequence, the first link and the second link are both straight links, the third link is an L-shaped link, the upper end of the first link is rotatably connected to the two side plates through a second pin, the lower end of the first link and the upper end of the second link are rotatably connected to the two side plates through a third pin, the lower end of the second link and the upper end of the vertical rod in the third link are rotatably connected to the two side plates through a fourth pin, the bending part of the third link is rotatably connected to the two side plates through a fifth pin, and the end of the cross rod in the third link away from the vertical rod is rotatably connected to one end of the pin through a sixth pin; the stop block is used to block the first link.

[0008] Furthermore, an eye plate is fixed to the upper end of the L-shaped plate, and one end of the hydraulic cylinder away from the cylinder shaft is rotatably connected to the eye plate via a first pin shaft.

[0009] Furthermore, the upper end surface of the side plate includes a first straight section, a first inclined section, a second inclined section and a second straight section which are successively close to the vertical plate; the cylinder barrel of the hydraulic cylinder is located outside the two side plates and on the side of the second inclined section away from the vertical plate; the telescopic end surface of the hydraulic cylinder is arranged parallel to the first inclined section, and the central axis of the hydraulic cylinder is arranged parallel to the second inclined surface; the stop block is located at the top between the two side plates and within the range of the first straight section.

[0010] Furthermore, a first opening and a second opening are mirror-symmetrically provided on the two side panels, wherein the first opening is located within the movement range of the second connecting rod, and the second opening is located at the lower inner right angle of the side panel close to one side of the vertical plate in the L-shaped plate.

[0011] Furthermore, the first connecting rod, the second connecting rod and the third connecting rod are each composed of two side plates that are adapted to their respective shapes and are arranged in mirror symmetry, and a connecting plate for connecting the two side plates, and the connecting plate is fixedly connected to the side walls on the same side of the two side plates in the thickness direction.

[0012] The mechanical self-locking latch mechanism for the ship roll-on / roll-off equipment locking device of the present invention adopts a combination of a hydraulic cylinder and a latch, and drives the latch to move through the hydraulic cylinder to achieve the locking and unlocking functions of the roll-on / roll-off equipment locking device. The mechanism has a mechanical self-locking function. During the navigation of the ship, even if the cylinder fails accidentally, the latch cannot be pushed back under the action of the stop block, thereby avoiding the reduction of the effectiveness of the locking device and ensuring navigation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional diagram of the mechanical self-locking latch mechanism for the ship roll-on / roll-off equipment locking device of the present invention.

[0014] Figure 2It is a locking state diagram of the mechanical self-locking latch mechanism used in the ship roll-on / roll-off equipment locking device of the present invention;

[0015] Figure 3 It is an intermediate state diagram of the mechanical self-locking latch mechanism for the ship roll-on / roll-off equipment locking device of the present invention;

[0016] Figure 4 The figure is an unlocking state diagram of the mechanical self-locking latch mechanism used in the locking device of the ship roll-on / roll-off equipment according to the present invention.

[0017] Among them, 1-hydraulic cylinder, 2-stop block, 3-bracket, 4-pin, 5-first connecting rod, 6-second connecting rod, 7-third connecting rod, 8-first pin, 9-second pin, 10-third pin, 11-fourth pin, 12-fifth pin, 13-sixth pin, 14-eye plate, 15-connecting plate, 31-L-shaped plate, 32-side plate, 321-first straight section, 322-first inclined section, 323-second inclined section, 324-second straight section, 325-first opening, 326-second opening. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1-Figure 3 As shown, a mechanical self-locking latch mechanism for a ship roll-on / roll-off equipment locking device comprises a bracket 3, a hydraulic cylinder 1, a stop block 2, a bendable connecting rod mechanism and a latch 4, wherein the bracket 3 comprises an L-shaped plate 31 and two side plates 32, wherein the two side plates 32 are arranged at both sides of the L-shaped plate 31 in a mirror-symmetrical manner and are fixedly connected to the L-shaped plate 31; an eye plate 14 is fixed to the upper end of the L-shaped plate 31, and the end of the hydraulic cylinder 1 away from the cylinder shaft is rotatably connected to the eye plate 14 through a first pin shaft 8, and the central axis of the hydraulic cylinder 1 is arranged to be inclined downward relative to the vertical plate, and the cylinder shaft of the hydraulic cylinder 1 is telescoped between the two side plates 32, and the piston of the hydraulic cylinder 1 can be extended or retracted; the latch 4 is arranged at the lower part between the two side plates 32, and is arranged parallel to the horizontal plate in the L-shaped plate 31;

[0020] The upper end surface of the side plate 32 includes a first straight section 321, a first inclined section 322, a second inclined section 323 and a second straight section 324 which are successively close to the vertical plate. The cylinder barrel of the hydraulic cylinder 1 is located outside the two side plates 32 and on the side of the second inclined section 323 away from the vertical plate. The telescopic end surface of the hydraulic cylinder 1 is arranged parallel to the first inclined section 322, and the central axis of the hydraulic cylinder 1 is arranged parallel to the second inclined surface. The stop block 2 is located at the top between the two side plates 32 and within the range of the first straight section 321.

[0021] The bendable link mechanism comprises a first link 5, a second link 6 and a third link 7 connected in sequence, the first link 5 and the second link 6 are both straight links, the third link 7 is an L-shaped link, the first link 5, the second link 6 and the third link 7 are each composed of two side plates that are adapted to their respective shapes and are arranged in mirror symmetry and a connecting plate 15 for connecting the two side plates, the connecting plate 15 is fixedly connected to the same side walls of the two side plates in the thickness direction, and pin holes are arranged at both ends of the two side plates; the upper end of the first link 5 is connected to the two side plates through the second pin 9 32 is rotatably connected, the lower end of the first connecting rod 5 and the upper end of the second connecting rod 6 are rotatably connected to the two side plates 32 through the third pin shaft 10, the lower end of the second connecting rod 6 and the upper end of the vertical rod in the third connecting rod 7 are rotatably connected to the two side plates 32 through the fourth pin shaft 11, the bending part of the third connecting rod 7 is rotatably connected to the two side plates 32 through the fifth pin shaft 12, and the end of the cross bar in the third connecting rod 7 away from the vertical rod is rotatably connected to one end of the pin 4 through the sixth pin shaft 13; the stop block 2 is used to block the first connecting rod 5 and limit its further movement by contacting the first connecting rod 5.

[0022] The first connecting rod 5, the second connecting rod 6, and the third connecting rod 7 are connected to each other through pins. When the hydraulic cylinder 1 pulls the third pin 10, once the first connecting rod 5 contacts the stop block 2, the fifth pin 12 crosses the line connecting the third pin 10 and the sixth pin 13, and the mechanism completes the locking action; conversely, the hydraulic cylinder 1 pushes out the third pin 10, driving the first connecting rod 5, the second connecting rod 6, and the third connecting rod 7 to move until the cylinder stroke is pushed to the maximum, driving the latch 4 to move, and completing the unlocking action.

[0023] It is worth mentioning that when the hydraulic cylinder 1 pulls the third pin 10, the third pin 10 will link the first connecting rod 5 and the second connecting rod 6. Since the first connecting rod 5 is rotatably connected to the second pin 9, the first connecting rod 5 will be pulled up to contact the stop block 2. When the first connecting rod 5 is pulled up by the hydraulic cylinder to contact the stop block 2, the first connecting rod 5 no longer rotates relative to the second pin 9. When the first connecting rod 5 is pulled up, the second connecting rod 6 is also pulled up. During the whole pulling process, the hydraulic cylinder 1 transmits the force to the fourth pin 11. Since the fourth pin 11 has no direct force, the pulling force of the hydraulic cylinder 1 is transmitted from the third pin 10 to the second connecting rod 6, and then the third connecting rod 7 is linked. When the position of the third pin 10 exceeds the line connecting the second pin 9 and the fourth pin 11, the bendable connecting rod mechanism is in a self-locking state. The reason is that the fourth pin 11 and the fifth pin 12 are connected to the L-shaped plate, and do not move relative to the L-shaped plate, but only rotate axially. The stopper 2 blocks the first link 5 from continuing to rise, so even if the latch 4 is unlocked by manual or external force, the force acting on the latch 4 is transmitted to the third link 7. Since the third link 7 is an L-shaped link, after passing through the fifth pin 12 that can move axially, the force is transmitted to the fourth pin 11. However, since the position of the third pin 10 is above the line connecting the second pin 9 and the fourth pin 11, the force of unlocking by manual or external force will push the first link 5 to rotate counterclockwise, and due to the existence of the stopper 2, the first link 5 cannot rotate counterclockwise. The entire bendable link mechanism is in a self-locking state as a whole and cannot be unlocked by applying external force to the latch 4.

[0024] During the voyage of the ship, the latch 4 mechanism should be in a locked state to ensure the effectiveness of the locking device of the roll-on / roll-off equipment. Even if the oil cylinder is removed and the latch 4 is manually pushed, the first connecting rod 5 has a tendency to rotate counterclockwise under the interaction of the first connecting rod 5, the second connecting rod 6 and the third connecting rod 7, but due to the limiting effect of the stop block 2, the first connecting rod 5 cannot move further, so the latch 4 cannot push the entire bendable connecting rod mechanism to rotate clockwise to unlock, and the mechanism can achieve mechanical self-locking.

[0025] If mechanical unlocking is to be achieved, the hydraulic cylinder 1 can be used to apply force to the third pin 10. The thrust of the hydraulic cylinder 1 drives the third pin 10 to move clockwise, thereby linking the fourth pin 11, and then driving the L-shaped third connecting rod 7 to move counterclockwise, so that the position of the third pin 10 passes below the line connecting the second pin 9 and the fourth pin 11, thereby pushing the pin 4 back to complete the unlocking.

[0026] In order to facilitate the installation of several pins and subsequent lubrication, a first opening 325 and a second opening 326 are opened on the two side panels 32 in a mirror-symmetrical manner. The first opening 325 is located within the movement range of the second connecting rod 6, and the second opening 326 is located at the lower inner right angle of the side panel 32 close to the vertical panel of the L-shaped panel 31.

[0027] Those skilled in the art should understand that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical self-locking latch mechanism for a ship roll-on / roll-off equipment locking device, characterized in that: The support comprises an L-shaped plate and two side plates, the two side plates are arranged at both sides of the L-shaped plate in a mirror-symmetrical manner and are fixedly connected to the L-shaped plate; one end of the hydraulic cylinder away from the cylinder shaft is rotatably connected to the upper end of the side where the vertical plate and the horizontal plate are connected in the L-shaped plate, the central axis of the hydraulic cylinder is inclined downward relative to the vertical plate, and the cylinder shaft of the hydraulic cylinder is extended and retracted between the two side plates; the latch is placed in the lower part between the two side plates and is arranged parallel to the horizontal plate in the L-shaped plate; the free end of the cylinder shaft of the hydraulic cylinder is connected between the two ends of the bendable connecting rod mechanism, the stop block is located between the two side plates, and is fixedly connected to the two side plates, and is used to block the part between the upper end of the bendable connecting rod mechanism and the connection point between it and the cylinder shaft of the hydraulic cylinder, and the bendable connecting rod mechanism is driven to bend through the extension and retraction of the cylinder shaft of the hydraulic cylinder, and the free end of the latch is driven to extend and retract between the two side plates to achieve unlocking and locking; The bendable link mechanism includes a first link, a second link and a third link connected in sequence, the first link and the second link are both straight links, the third link is an L-shaped link, the upper end of the first link is rotatably connected to the two side plates through a second pin, the lower end of the first link and the upper end of the second link are rotatably connected to the two side plates through a third pin, the lower end of the second link and the upper end of the vertical rod in the third link are rotatably connected to the two side plates through a fourth pin, the bending part of the third link is rotatably connected to the two side plates through a fifth pin, and the end of the cross rod in the third link away from the vertical rod is rotatably connected to one end of the pin through a sixth pin; the stop block is used to block the first link; The upper end surface of the side plate includes a first straight section, a first inclined section, and a second inclined section and a second straight section which are successively close to the vertical plate. The cylinder barrel of the hydraulic cylinder is located outside the two side plates and on the side of the second inclined section away from the vertical plate. The telescopic end surface of the hydraulic cylinder is arranged parallel to the first inclined section, and the central axis of the hydraulic cylinder is arranged parallel to the second inclined surface. The stop block is located at the top between the two side plates and is located within the range of the first straight section.

2. A mechanical self-locking latch mechanism for a ship roll-on / roll-off equipment locking device according to claim 1, characterized in that: An eye plate is fixed on the upper end of the L-shaped plate, and one end of the hydraulic cylinder away from the cylinder shaft is rotatably connected to the eye plate through a first pin shaft.

3. A mechanical self-locking latch mechanism for a ship roll-on / roll-off equipment locking device according to claim 2, characterized in that: A first opening and a second opening are provided on the two side panels in mirror symmetry. The first opening is located within the movement range of the second connecting rod, and the second opening is located at the lower inner right angle of the side panel close to one side of the vertical plate in the L-shaped plate.

4. A mechanical self-locking latch mechanism for a ship roll-on / roll-off equipment locking device according to claim 2, characterized in that: The first connecting rod, the second connecting rod and the third connecting rod are each composed of two side plates that are adapted to their respective shapes and are arranged in mirror symmetry, and a connecting plate for connecting the two side plates, and the connecting plate is fixedly connected to the same side walls of the two side plates in the thickness direction.

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