Smooth traveling transition mechanism for stern door and fixed ramp of roll-on-roll-off ship

Abstract

The utility model discloses a smooth running transition mechanism for a stern door and a fixed ramp of a roll-on-roll-off ship, which comprises a transition mechanism body and a guide mechanism, one end of the transition mechanism body is rotatably connected with the stern door, and the other end of the transition mechanism body is lapped on the fixed ramp when the transition mechanism is used. The guide mechanism is fixed to the end, close to the stern door, of the fixed ramp, an inclined section is arranged on the lower end face of the transition mechanism body, the inclined section inclines downwards relative to the upper end face of the transition mechanism body from the end, close to one side of the fixed ramp, of the lower end face, and a sliding mechanism is arranged on the inclined section. The upper end face of the guide mechanism is an inclined face which inclines downwards relative to the horizontal plane from the end of the side, close to the stern door, of the fixed ramp, and the sliding mechanism slides on the guide mechanism. The smooth running transition mechanism for the stern door and the fixed ramp of the roll-on-roll-off ship can meet the requirements of smooth running, rolling storage and convenient maintenance at the same time.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, and in particular to a smooth transition mechanism for a roll-on / roll-off ship's stern door and a fixed ramp. Background Technology

[0002] The roll-on / roll-off (Ro-Ro) passage system is the core system for loading and unloading cargo on Ro-Ro ships, directly determining the ship's operational efficiency. A Ro-Ro passage system generally includes an external stern door (or side door) and internal fixed ramps (or movable ramps). Due to changes in the ship's draft and the tidal level at the dock, the height difference between the main deck and the quay wall changes, resulting in the stern door's operating angle typically being + / - 7°. o The angle of the fixed ramp connecting the main deck and the upper deck is generally 7-9 degrees. o Currently, the conventional transition between the stern door and the fixed ramp uses a simple sliding cover. However, when the stern door is at a large working angle, the angle between the stern door and the fixed ramp forms a V-shape or an inverted V-shape. Conventional sliding covers often have the following three problems:

[0003] 1. Shorter sliding covers cannot achieve a smooth transition, resulting in uneven vehicle movement and affecting loading and unloading efficiency and safety;

[0004] 2. Longer sliding covers need to slide a considerable distance across the stern door or fixed ramp surface for storage when the stern door is closed. However, these surfaces have anti-slip measures such as sandpaper or herringbone strips, making them difficult to slide.

[0005] 3. A longer sliding cover can achieve a smooth transition, but it is inconvenient to operate manually and makes it difficult to inspect the stern door hinges that are covered by the cover. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a smooth transition mechanism between the stern door and the fixed ramp of a roll-on / roll-off ship, which can simultaneously meet the requirements of smooth travel, rolling storage, and convenient maintenance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A smooth-moving transition mechanism between a stern door and a fixed ramp of a roll-on / roll-off ship includes a transition mechanism body and a guide mechanism. One end of the transition mechanism body is rotatably connected to the stern door, and the other end rests on the fixed ramp during use. The guide mechanism is fixed to the end of the fixed ramp near the stern door. The lower end face of the transition mechanism body has an inclined section, which slopes downward relative to the upper end face of the transition mechanism body from the end of the lower end face near the fixed ramp. The inclination angle of the inclined section is the same as the inclination angle of the fixed ramp. A sliding mechanism is provided on the inclined section. The upper end face of the guide mechanism is an inclined surface that slopes downward relative to the horizontal surface from the end of the fixed ramp near the stern door. The sliding mechanism slides on the guide mechanism.

[0009] Furthermore, the sliding mechanism includes a first sliding mechanism and a second sliding mechanism. The first sliding mechanism slides friably with the guide mechanism, and the second sliding mechanism slides rollingly with the guide mechanism. The first sliding mechanism is located at the end of the inclined section near the fixed ramp, and the second sliding mechanism is located within the length range of the inclined section.

[0010] Furthermore, the first sliding mechanism is a semi-circular steel bar with its arc surface facing outwards; the second sliding mechanism is a roller.

[0011] Furthermore, the guiding mechanism includes a guide plate, which includes a first inclined section and a second inclined section. The inclination angle of the first inclined section is smaller than that of the second inclined section. The side of the first inclined section away from the second inclined section is connected to the fixed ramp. The connecting side of the first inclined section and the second inclined section extends to the outer side of the hull.

[0012] Furthermore, the tilt angle of the second tilt segment is greater than the tilt angle of the tilt segment.

[0013] Furthermore, a support mechanism is connected between the lower end face of the second inclined section and the outer wall of the hull; reinforcement members are provided on the inner side of the connecting corner of the first and second inclined sections and in the angle formed by the first inclined section and the outer wall of the hull.

[0014] Furthermore, the length of the upper end face of the transition mechanism body along the direction from the stern door to the fixed ramp is greater than the length of the lower end face of the transition mechanism body in that direction.

[0015] Furthermore, a lifting eye plate is provided on the upper end face of the transition mechanism body near the fixed ramp.

[0016] Furthermore, the transition mechanism body is rotatably connected to the stern gate via a connecting shaft.

[0017] Compared to conventional sliding covers, the smooth-running transition mechanism between the stern door and the fixed ramp of the roll-on / roll-off ship described in this utility model is extended, which can effectively fill the V-shaped or inverted V-shaped angle area between the stern door and the fixed ramp, realize smooth-running, and improve loading and unloading efficiency and safety; the transition mechanism can smoothly roll on the surface of the fixed ramp, making it easy to store; the transition mechanism can be easily lifted and operated manually, facilitating the maintenance of the stern door hinges that are covered by the transition mechanism. Attached Figure Description

[0018] Figure 1 This describes the working state of the smooth transition mechanism between the stern door of the roll-on / roll-off ship and the fixed ramp, when the stern door's working angle is -7°.

[0019] Figure 2 for Figure 1 Enlarged diagram of part A in the middle.

[0020] Figure 3 This describes the working state of the smooth transition mechanism between the stern door of the roll-on / roll-off ship and the fixed ramp, when the stern door's working angle is +7°.

[0021] Figure 4 for Figure 3 Enlarged schematic diagram of part B in the middle.

[0022] Figure 5 This refers to the working state of the smooth transition mechanism between the stern door of the roll-on / roll-off ship and the fixed ramp, as described in this utility model, when the stern door is in the retracted state.

[0023] Figure 6 for Figure 5 Enlarged diagram of section C.

[0024] Figure 7 This invention describes the lifting state of the smooth-moving vehicle transition mechanism between the stern gate of the roll-on / roll-off ship and the fixed ramp when the stern gate needs maintenance.

[0025] Among them, 1-transition mechanism body; 2-connecting shaft; 3-semi-circular steel; 4-roller; 5-guide mechanism; 6-lifting plate; 7-stern door; 8-fixed ramp; 101-inclined section; 501-guide plate; 502-support mechanism; 503-reinforcing member; 5011-first inclined section; 5012-second inclined section. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] As shown in the figure -Figure 7 As shown, a smooth-moving transition mechanism between a stern door and a fixed ramp of a roll-on / roll-off ship includes a transition mechanism body 1 and a guide mechanism 5. One end of the transition mechanism body 1 is rotatably connected to the stern door 7, and the other end is attached to the fixed ramp 8 during use. The guide mechanism 5 is fixed to the end of the fixed ramp 8 near the stern door 7. The lower end face of the transition mechanism body 1 is provided with an inclined section 101. The inclined section 101 is inclined downward relative to the upper end face of the transition mechanism body 1 from the end of the lower end face near the fixed ramp 8. The inclination angle of the inclined section 101 is the same as the inclination angle of the fixed ramp 8. A sliding mechanism is provided on the inclined section 101. The upper end face of the guide mechanism 5 is an inclined surface that is inclined downward relative to the horizontal surface from the end of the fixed ramp 8 near the stern door 7. The sliding mechanism slides on the guide mechanism 5.

[0028] The angle of the fixed ramp 8 is determined by the floor height and length of the fixed ramp. It generally does not exceed 7°.

[0029] In some embodiments, the transition mechanism body 1 is rotatably connected to the stern door 7 via a connecting shaft 2. Of course, in other embodiments, the transition mechanism body 1 may also be rotatably connected to the stern door 7 in other ways, such as via hinges and pins.

[0030] Furthermore, the sliding mechanism includes a first sliding mechanism and a second sliding mechanism. The first sliding mechanism slides friably with the guide mechanism 5, and the second sliding mechanism slides rollingly with the guide mechanism 5. The first sliding mechanism is located at the end of the inclined section 101 near the fixed ramp 8, and the second sliding mechanism is located within the length range of the inclined section 101.

[0031] In some embodiments, the first sliding mechanism is a semi-circular steel bar 3, with the arc surface of the semi-circular steel bar 3 facing outward; the second sliding mechanism is a roller 4. The installation positions of the roller 4 and the semi-circular steel bar 3 are determined such that, within the stern door's working range of + / -7°, the roller 4 should be near the guide mechanism 5 but not move onto the guide mechanism 5, while the semi-circular steel bar 3 should operate on the guide mechanism 3.

[0032] Furthermore, the guiding mechanism 5 includes a guide plate 501, which includes a first inclined section 5011 and a second inclined section 5012. The inclination angle of the first inclined section 5011 is smaller than that of the second inclined section 5012. The side of the first inclined section 5011 away from the second inclined section 5012 is connected to the fixed ramp 8. The connection side of the first inclined section 5011 and the second inclined section 5012 extends to the outer side of the hull.

[0033] Furthermore, the tilt angle of the second tilt segment 5012 is greater than the tilt angle of the tilt segment 101.

[0034] Furthermore, a support mechanism 502 is connected between the lower end face of the second inclined section 5012 and the outer wall of the hull; a reinforcing member 503 is provided on the inner side of the connecting corner of the first inclined section 5011 and the second inclined section 5012 and in the angle formed by the first inclined section 5011 and the outer wall of the hull.

[0035] Furthermore, the length of the upper end face of the transition mechanism body 1 along the direction from the stern gate 7 to the fixed ramp 8 is greater than the length of the lower end face of the transition mechanism body 1 in that direction.

[0036] Furthermore, a lifting eye plate 6 is provided on the upper end face of the transition mechanism body 1 near the fixed ramp 8.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smooth transition mechanism for a roll-on / roll-off ship's stern door and a fixed ramp, characterized in that, The device includes a transition mechanism body and a guide mechanism. One end of the transition mechanism body is rotatably connected to the stern door, and the other end rests on the fixed ramp during use. The guide mechanism is fixed to the fixed ramp near the stern door. The lower end face of the transition mechanism body has an inclined section. The inclined section is inclined downward relative to the upper end face of the transition mechanism body from the end of the lower end face near the fixed ramp. The inclination angle of the inclined section is the same as the inclination angle of the fixed ramp. A sliding mechanism is provided on the inclined section. The upper end face of the guide mechanism is an inclined surface that is inclined downward relative to the horizontal surface from the end of the fixed ramp near the stern door. The sliding mechanism slides on the guide mechanism.

2. The smooth transition mechanism between the stern door of a roll-on / roll-off ship and the fixed ramp according to claim 1, characterized in that, The sliding mechanism includes a first sliding mechanism and a second sliding mechanism. The first sliding mechanism slides friably with the guide mechanism, and the second sliding mechanism slides rollingly with the guide mechanism. The first sliding mechanism is located at the end of the inclined section near the fixed ramp, and the second sliding mechanism is located within the length range of the inclined section.

3. The smooth transition mechanism between the stern door of a roll-on / roll-off ship and the fixed ramp according to claim 2, characterized in that, The first sliding mechanism is a semi-circular steel bar with its arc surface facing outwards; the second sliding mechanism is a roller.

4. The smooth transition mechanism between the stern door of a roll-on / roll-off ship and the fixed ramp according to claim 3, characterized in that, The guiding mechanism includes a guide plate, which includes a first inclined section and a second inclined section. The inclination angle of the first inclined section is smaller than that of the second inclined section. The side of the first inclined section away from the second inclined section is connected to the fixed ramp. The connection side between the first inclined section and the second inclined section extends to the outside of the hull.

5. The smooth transition mechanism between the stern door of a roll-on / roll-off ship and the fixed ramp according to claim 4, characterized in that, The tilt angle of the second tilt segment is greater than the tilt angle of the tilt segment.

6. The smooth transition mechanism between the stern door of a roll-on / roll-off ship and the fixed ramp according to claim 5, characterized in that, A support mechanism is connected between the lower end face of the second inclined section and the outer wall of the hull; reinforcement members are provided on the inner side of the connecting corner of the first and second inclined sections and in the angle formed by the first inclined section and the outer wall of the hull.

7. The smooth transition mechanism between the stern door of a roll-on / roll-off ship and the fixed ramp according to claim 6, characterized in that, The length of the upper end face of the transition mechanism body along the direction from the stern door to the fixed ramp is greater than the length of the lower end face of the transition mechanism body in that direction.

8. The smooth transition mechanism between the stern door of a roll-on / roll-off ship and the fixed ramp according to claim 1, characterized in that, A lifting eye plate is provided on the side of the upper end face of the transition mechanism body near the fixed ramp.

9. The smooth transition mechanism between the stern door of a roll-on / roll-off ship and the fixed ramp according to claim 1, characterized in that, The transition mechanism body is rotatably connected to the stern gate via a connecting shaft.

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