Ship hatch cover mechanism

Abstract

The application discloses a ship hatch cover mechanism, which comprises a guide rail, a cover plate assembly and a driving assembly. The guide rail extends along a second direction, and the second direction is at an angle with a first direction. The cover plate assembly comprises a first cover plate, a second cover plate, a third cover plate and a fourth cover plate which are sequentially hinged in the second direction, and the side of the first cover plate away from the second cover plate is rotationally connected to the bow end of the hatch. The second cover plate and the fourth cover plate are provided with rollers on both sides of the hatch in the first direction, the rollers are respectively rollingly arranged on the corresponding guide rails, and the rollers can roll along the extension direction of the guide rails. The second cover plate is provided with an ear plate on the opposite sides in the first direction. The driving assembly comprises a first driving member and a second driving member, the first driving member is used for driving the first cover plate to rotate relative to the hatch, and the second driving member is used for driving the third cover plate to rotate relative to the hatch. The mechanism can be applied to a ship hatch of a large size, occupies less space in the vertical direction, and is convenient to control.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a ship hatch cover mechanism. Background Technology

[0002] Existing folding hatch covers consist of two hinged covers. The first cover is hinged to the ship's hatch opening, and the second cover is connected to a drive rod. The extension and retraction of the drive rod causes the second cover to slide across the ship's hatch opening, thus opening or closing the folding hatch cover. However, this type of folding hatch cover has the following drawbacks: Since there are only two covers in the folding hatch cover, increasing the size of the covers for large ship hatches would inevitably increase the overall weight of each individual cover, making it difficult to control the sliding of the covers and thus hindering the opening or closing of the ship's hatch. In addition, due to the increased size of each cover, the folding hatch occupies a larger vertical space when the ship's hatch is opened; if the size of the covers is not increased, the folding hatch cover cannot be used in the hatches of large ships. Summary of the Invention

[0003] The purpose of this invention is to provide a ship hatch cover mechanism that is applicable to larger ship hatches, occupies less vertical space when opening the ship hatch, and is easy to operate.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A ship hatch cover mechanism is provided, comprising:

[0006] The guide rail has two rails, which are respectively set on the top of the enclosure on both sides of the hatch in the first direction. The guide rail extends along a second direction, which forms an angle with the first direction.

[0007] A cover plate assembly for covering a hatch having a front end and a rear end in a second direction. The cover plate assembly includes a first cover plate, a second cover plate, a third cover plate, and a fourth cover plate that are sequentially hinged in the second direction. The side of the first cover plate away from the second cover plate is rotatably connected to the front end of the hatch. The second cover plate and the fourth cover plate are each provided with rollers on both sides of the hatch in the first direction. The rollers are respectively rolled on corresponding guide rails and are capable of rolling along the extension direction of the guide rails. The second cover plate has ear plates protruding on both sides in the first direction.

[0008] The drive assembly has two sets, which are respectively located on opposite sides of the hatch in the first direction. Each set of the drive assembly includes a first drive member and a second drive member. The first drive member is used to drive the first cover plate to rotate relative to the hatch, and the second drive member is used to drive the third cover plate to rotate relative to the hatch.

[0009] As a preferred technical solution of the aforementioned ship hatch cover mechanism, it further includes a first limiting member, which includes a limiting plate. The limiting plate is rotatably disposed on the enclosure on the side of the hatch located in the first direction. The limiting plate is provided with a hook and a pull chain. The limiting plate can swing between a first position and a second position, and the limiting plate always has a tendency to swing towards the first position. When the second cover is in the open position, the limiting plate is in the first position, and the hook can hook the ear plate to restrict the movement of the second cover relative to the hatch. The pull chain is used to drive the limiting plate to swing to the second position so that the hook can disengage from the ear plate.

[0010] As a preferred technical solution of the aforementioned ship hatch cover mechanism, the first limiting member further includes a fixing seat, which is fixed to the enclosure plate on the first direction side of the hatch. The fixing seat is rotatably connected to the limiting plate through a first rotating shaft, and the limiting plate is located between the fixing seat and the enclosure plate.

[0011] As a preferred technical solution of the aforementioned ship hatch cover mechanism, the first rotating shaft is connected to the non-end of the limiting plate. The two opposite ends of the limiting plate in the length direction are a first end and a second end, respectively. The first end faces the end of the hatch, and the second end faces the beginning of the hatch. The weight of the portion of the limiting plate from the first end to the first rotating shaft is M1, and the weight of the portion of the limiting plate from the second end to the first rotating shaft is M2, where M1 ≥ M2.

[0012] As a preferred technical solution of the ship hatch cover mechanism, the end of the ear plate opposite to the second cover plate is provided with a hooking protrusion for the hook to hook onto, and the fixed seat is provided with a limiting part. The hook and the limiting part form a receiving position for accommodating the hooking protrusion.

[0013] As a preferred technical solution of the aforementioned ship hatch cover mechanism, a blocking plate is provided on the limiting plate. The blocking plate is rotatably connected to the limiting plate. The blocking plate has a third position and a fourth position. The blocking plate can swing between the third position and the fourth position. The blocking plate always has a tendency to swing towards the third position. When the blocking plate is in the third position, one end of the blocking plate abuts against the end face of the hook protrusion away from the second cover plate to prevent the limiting plate from approaching the ear plate. When the blocking plate is in the fourth position, one end of the blocking plate releases its abutment against the hook protrusion.

[0014] As a preferred technical solution of the aforementioned ship hatch cover mechanism, the non-end of the blocking plate is rotatably connected to the limiting plate via a second rotating shaft. The limiting plate is also provided with a limiting protrusion spaced apart from the second rotating shaft. The limiting protrusion is used to abut against the blocking plate to limit the blocking plate to the third position. The two opposite ends of the blocking plate in the length direction are the third end and the fourth end, respectively. The third end can abut against the hooking protrusion. The weight of the blocking plate from the third end to the second rotating shaft is M3, and the weight of the blocking plate from the fourth end to the second rotating shaft is M4, where M4 > M3.

[0015] As a preferred technical solution of the ship hatch cover mechanism, a guide slope is provided at one end of the hook near the second cover plate, and the guide slope slopes downward from the front end of the hatch toward the rear end.

[0016] As a preferred technical solution for the aforementioned ship hatch cover mechanism, the end face of the hooking protrusion facing away from the second cover plate has a convex arc structure.

[0017] As a preferred technical solution of the aforementioned ship hatch cover mechanism, it further includes a second limiting member, which includes a stop plate and a stop member. The second driving member includes a second telescopic cylinder and a swing arm hinged to the second telescopic cylinder. One end of the swing arm is rotatably connected to a cofferdam on one side of the hatch in the first direction, and the other end of the swing arm is rotatably connected to the third cover plate. The stop plate protrudes from one side of the fourth cover plate. When the swing arm drives the third cover to the open position, the stop member is tightened in the stop plate to restrict the movement of the fourth cover plate.

[0018] The beneficial effects of this invention are as follows: In this type of ship hatch cover mechanism, four cover plates hinged in sequence form a cover plate assembly. For large hatches, this reduces the overall height of a single cover plate. When the hatch is open (i.e., when the first, second, third, and fourth cover plates are folded), all four cover plates are folded vertically at the front end of the hatch, shortening the space occupied by the cover plate assembly in the vertical direction. When the first driving member drives the first cover plate to rotate relative to the hatch, the second cover plate is moved along the extension direction of the guide rail via rollers, and the second driving member drives the third cover plate... Compared to the hatch rotation, the fourth cover plate is moved along the extension direction of the guide slide by rollers. Two driving components are set up to drive different cover plates to move respectively. This reduces the load on each driving component and lowers the requirements of the driving components. The first and second driving components can work simultaneously to drive the second and fourth cover plates to open or close at the same time. It is not necessary to wait for the third and fourth cover plates to be opened before driving the second cover plate to open, nor is it necessary to wait for the first and second cover plates to be closed before driving the third and fourth cover plates to close. This can speed up the opening and closing speed of the cover plate assembly. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a structural diagram of the ship hatch cover mechanism described in the embodiment.

[0021] Figure 2 This is a structural diagram of the second cover plate and the first limiting member on the enclosure plate in the embodiment (when the second cover plate is in the open position and the hook part is engaged with the ear plate).

[0022] Figure 3 This is a structural diagram of the second cover plate and the first limiting member on the enclosure plate in the embodiment (when the second cover plate is in the open position and the hook part is released from the ear plate).

[0023] Figure 4 This is a structural diagram of the second cover plate and the first limiting member on the enclosure plate in the embodiment (when the hatch is closed and the hook part is released from the hook plate).

[0024] Figure 5 This is a schematic diagram showing the connection of the enclosure, fixing seat, and limiting plate described in the embodiment.

[0025] Figure 6 This is a schematic diagram showing the connection between the limiting plate and the blocking plate described in the embodiment.

[0026] In the picture:

[0027] 1. Cover plate assembly; 11. First cover plate; 12. Second cover plate; 121. Ear plate; 1211. Hook-fitting protrusion; 1212. Convex arc structure; 13. Third cover plate; 14. Fourth cover plate; 15. Roller;

[0028] 2. Enclosure panel; 21. Guide rail; 3. Drive assembly; 31. First drive component; 32. Second drive component; 33. Swing arm; 4. First limiting component; 41. Limiting plate; 411. Hook part; 4111. Guide slope; 42. Blocking plate; 421. Wear-resistant part; 43. Limiting protrusion; 45. First rotating shaft; 46. Second rotating shaft; 47. Accommodation position; 48. Fixed seat; 481. Limiting part; 49. Pull chain; 5. Second limiting component; 51. Stop plate; 52. Stop component. Detailed Implementation

[0029] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] like Figures 1 to 6As shown, the present invention provides a ship hatch cover mechanism, including guide rails 21, cover plate assembly 1, and drive assembly 3. There are two guide rails 21, each disposed on the top of a cofferdam 2 located on opposite sides of the hatch in a first direction. The guide rails 21 extend along a second direction, forming an angle with the first direction. The cover plate assembly 1 covers the hatch, which has opposite proximal and distal ends in the second direction. The cover plate assembly 1 includes a first cover plate 11, a second cover plate 12, a third cover plate 13, and a fourth cover plate 14, sequentially hinged in the second direction. The side of the first cover plate 11 away from the second cover plate 12 is rotatably connected to the proximal end of the hatch. Rollers 15 are provided on both sides of the second cover plate 12 and the fourth cover plate 14 in the second direction, with each guide rail 21 on the same side corresponding to a roller 15 on the same side. The rollers 15 are rotatably mounted on their respective guide rails 21 and can roll along the extension direction of the guide rail 21. Ear plates 121 protrude from opposite sides of the second cover plate 12 in the first direction. The drive assembly 3 has two sets, which are respectively arranged on opposite sides of the hatch in the first direction. Each set of drive assemblies 3 includes a first drive member 31 and a second drive member 32. The first drive member 31 is used to drive the first cover plate 11 to rotate relative to the hatch, and the second drive member 32 is used to drive the third cover plate 13 to rotate relative to the hatch.

[0033] In this type of ship hatch cover mechanism, four sequentially hinged cover plates form a cover plate assembly 1. For large hatches, this reduces the overall height of a single cover plate. When the hatch is open (i.e., when the first cover plate 11, the second cover plate 12, the third cover plate 13, and the fourth cover plate 14 are folded), all four cover plates are folded vertically at the front end of the hatch, shortening the space occupied by the cover plate assembly 1 in the vertical direction. When the first drive member 31 drives the first cover plate 11 to rotate relative to the hatch, the roller 15 drives the second cover plate 12 to move along the extension direction of the guide rail 21, and the second drive member 32 drives the third cover plate 13 to rotate relative to the hatch. When in motion, the fourth cover plate 14 is moved along the extension direction of the guide slide by the roller 15. Two driving components are set to drive different cover plates to move respectively, which reduces the load on each driving component and lowers the requirements of the driving components. The first driving component 31 and the second driving component 32 can work simultaneously to drive the second cover plate 12 and the fourth cover plate 14 to open or close at the same time. It is not necessary to wait for the third cover plate 13 and the fourth cover plate 14 to open before driving the second cover plate 12 to open, nor is it necessary to wait for the first cover plate 11 and the second cover plate 12 to close before driving the third cover plate 13 and the fourth cover plate 14 to close. This can speed up the opening and closing speed of the cover plate assembly 1.

[0034] Furthermore, the ship hatch cover mechanism also includes a first limiting member 4, which includes a limiting plate 41. The limiting plate 41 is rotatably mounted on the cofferdam 2 located on the side of the hatch in a first direction. In this example, the limiting plate 41 is rotatably mounted on the side of the cofferdam 2 facing away from the inside of the hatch. The limiting plate 41 is provided with a hook portion 411 and a pull chain 49. The limiting plate 41 can swing between a first position and a second position, and the limiting plate 41 always has a tendency to swing towards the first position. When the second cover plate 12 is in the open position, the limiting plate 41 is in the first position, and the hook portion 411 can hook onto the ear plate 121 to restrict the movement of the second cover plate 12 relative to the hatch. The pull chain 49 is used to drive the limiting plate 41 to swing to the second position so that the hook portion 411 is released from the ear plate 121. When the cover plate assembly 1 fully opens the hatch, all four covers are in their respective open positions. When the second cover plate 12 is in the open position, the latch 411 on the limiting plate 41 in the first position engages with the lug 121 on the second cover plate 12, locking the position of the second cover plate 12 and thus restricting its movement relative to the hatch. This prevents the second cover plate 12 from accidentally sliding towards the closed hatch position, thus preventing the sliding of the second cover plate 12 from exerting a thrust on the third cover plate 13 and the fourth cover plate 14, which would increase the load on the second drive member 32 and cause damage to it. This also avoids the third cover plate 13 and the fourth cover plate 14 being subjected to [unspecified force]. The second cover plate 12 may accidentally close the hatch. When it is necessary to close the hatch, the pull chain 49 is used to pull the limiting plate 41 to rotate (in this example, the limiting plate 41 is pulled to rotate clockwise) so that the latching hook is lowered relative to the ear plate 121. After the latching hook is released from the ear plate 121, the ear plate 121 can be driven by the first driving member 31 to slide relative to the limiting plate 41 toward the end of the hatch. After the ear plate 121 slides the limiting plate 41, the limiting plate 41 always has a tendency to swing toward the first position. The limiting plate 41 automatically resets to the first position.

[0035] Specifically, the first limiting member 4 also includes a fixing seat 48, which is fixed on the enclosure 2 on one side of the hatch in the first direction. The fixing seat 48 is rotatably connected to the limiting plate 41 through the first rotating shaft 45. The limiting plate 41 is located between the fixing seat 48 and the enclosure 2, and the fixing seat 48 provides support to the limiting plate 41.

[0036] In this example, the first rotating shaft 45 is connected to the non-end of the limiting plate 41. The two opposite ends of the limiting plate 41 along its length are the first end and the second end, respectively. The first end faces the end of the hatch, and the second end faces the front end of the hatch. The weight of the portion of the limiting plate 41 from the first end to the first rotating shaft 45 is M1, and the weight of the portion of the limiting plate 41 from the second end to the first rotating shaft 45 is M2, where M1 ≥ M2. By setting M1 ≥ M2, the limiting plate 41 is always in the first position when it is not subjected to external force. When the second cover plate 12 is in the open position, the limiting plate 41 can automatically engage with the second cover plate 12.

[0037] In another example, the limiting plate 41 can also be driven by an elastic element (e.g., a spring) to always have a tendency to rotate toward the first position.

[0038] The ear plate 121 has a hook protrusion 1211 protruding from the end opposite to the second cover plate 12, which is for the hook portion 411 to hook onto. The fixing seat 48 has a limiting portion 481 protruding from it. The hook portion 411 and the limiting portion 481 form a receiving position 47 for accommodating the hook protrusion 1211. With this design, when the limiting plate 41 hooks the ear plate 121 into place, the hook protrusion 1211 is located in the receiving position 47 between the limiting portion 481 and the hook protrusion, preventing it from continuing to move towards the bow end of the hatch and causing the second cover plate 12 to collide with the first cover plate 11.

[0039] Preferably, a blocking plate 42 is provided on the limiting plate 41. The blocking plate 42 is rotatably connected to the limiting plate 41. The blocking plate 42 has a third position and a fourth position. The blocking plate 42 can swing between the third position and the fourth position. The blocking plate 42 always has a tendency to swing towards the third position. When the blocking plate 42 is in the third position, one end of the blocking plate 42 abuts against the end face of the hook protrusion 1211 to prevent the limiting plate 41 from approaching the ear plate 121. When the blocking plate 42 is in the fourth position, one end of the blocking plate 42 releases from abutting against the hook protrusion 1211. When it is necessary to close the hatch, the limiting plate 41 is first pulled down by pulling the chain 49. After the hook 411 releases from the second cover plate 12, the second cover plate 12 moves towards the end of the hatch. In this embodiment, by setting a blocking plate 42, when the hook portion 411 of the limiting plate 41 engages with the ear plate 121, one end of the blocking plate 42 is pressed downward by the ear plate 121 (i.e., the blocking plate 42 rotates counterclockwise), so that the blocking plate 42 is in the fourth position; when the limiting plate 41 is pulled downward by the pulling chain 49 to rotate toward the second position, as the limiting plate 41 rotates, the blocking plate 42 automatically rotates from the fourth position to the third position (i.e., the blocking plate 42 rotates clockwise from the fourth position to the third position). In the third position, one end of the blocking plate 42 abuts against the end face of the second cover plate 12, thereby preventing the limiting plate 41 from approaching the ear plate 121, preventing the limiting plate 41 from interfering with the movement of the ear plate 121 and causing the limiting plate 41 to be worn. Because there are many components near the hatch, the operator cannot directly observe whether the ear plate 121 has completely passed the limit plate 41. By setting a stop plate 42 that can swing between the third and fourth positions, the pulling force on the pull chain 49 is removed when the ear plate 121 has not completely passed the limit plate 41. Under the obstruction of the stop plate 42, the limit plate 41 will not contact the ear plate 121. Furthermore, since the stop plate 42 always has a tendency to swing towards the third position, the stop plate 42 can automatically return to the fourth position after the ear plate 121 passes the limit plate 41. In addition, the time for pulling the pull chain 49 can be reduced during actual operation, making it easier to operate.

[0040] When the baffle plate 42 abuts against the ear plate 121 in the third position, the end face of the ear plate 121 slides past the baffle plate 42. Because the baffle plate 42 slides against the end face of the ear plate 121, the part of the baffle plate that contacts the ear plate 121 will experience some wear. To address this, a wear-resistant part 421 is provided at the end of the baffle plate 42 that abuts against the hook protrusion 1211. The wear-resistant part 421 is made of wear-resistant material to reduce the wear of the baffle plate 42.

[0041] In this example, the non-end of the blocking plate 42 is rotatably connected to the limiting plate 41 via the second rotating shaft 46. The limiting plate 41 is also provided with a limiting protrusion 43 spaced apart from the second rotating shaft 46. The limiting protrusion 43 is used to abut against the blocking plate 42 to limit the blocking plate 42 to the third position. The two opposite ends of the blocking plate 42 in the length direction are the third end and the fourth end, respectively. The wear-resistant part 421 is located at the third end. The weight of the blocking plate 42 from the third end to the second rotating shaft 46 is M3, and the weight of the blocking plate 42 from the fourth end to the second rotating shaft 46 is M4, where M4 > M3. With M4 > M3, under the drive of gravity, the blocking plate 42 automatically rotates clockwise from the third position toward the limiting protrusion, and finally stops when blocked by the limiting protrusion 43, thereby causing the blocking plate 42 to automatically stop at the fourth position.

[0042] The end face of the hook protrusion 1211 facing away from the second cover plate 12 is a convex arc structure 1212. The arc structure surface has a smooth transition, which helps the hook protrusion 1211 to slide smoothly over the baffle plate 42.

[0043] Understandably, once the lug 121 has completely passed the limiting plate 41, the lug 121 releases its pressure on the blocking plate 42, and thus the limiting plate 41 automatically returns to the first position. During the process of the second cover 12 sliding from the end of the hatch towards the forehead to the open position, the hook protrusion of the lug 121 automatically presses down on the limiting plate 41 and slides past the hook portion 411. After the hook protrusion has completely passed the hook portion 411, the limiting plate 41 rotates counterclockwise under the force of gravity, causing the hook portion 411 to swing to the first position and hook the lug 121, thus limiting the second cover 12. During the process of the second cover 12 sliding from the end of the hatch towards the forehead to the open position, to facilitate the passage of the lug 121 through the hook portion 411, a guide slope 4111 is provided at one end of the hook portion 411 near the second cover 12. The guide slope 4111 slopes downwards from the forehead towards the end of the hatch.

[0044] In this embodiment, the first driving component 31 is a first telescopic cylinder. The first telescopic cylinder has a cylinder body and a telescopic rod that extends and retracts relative to the cylinder body. The cylinder body of the first telescopic rod is hinged to the inner side of the enclosure 2. One end of the telescopic rod is connected to the cylinder body, and the other end is connected to the first cover plate 11. The cylinder body of the first telescopic cylinder is connected to the enclosure 2 on one side of the hatch in the first direction.

[0045] The ship hatch cover mechanism also includes a second limiting member 5, which includes a stop plate 51 and a stop member 52. The second driving member 32 includes a second telescopic cylinder and a swing arm 33 hinged to the second telescopic cylinder. One end of the swing arm 33 is rotatably connected to the cofferdam 2 on one side of the hatch in a first direction, and the other end of the swing arm 33 is rotatably connected to the third cover plate 13. The stop plate 51 protrudes from one side of the fourth cover plate 14. When the swing arm 33 drives the third cover plate 13 to the open position, the stop member 52 is tightened in the stop plate 51 to restrict the movement of the fourth cover plate 14. Specifically, the cylinder body of the second telescopic cylinder is hinged to the front end of the hatch, and the end of the telescopic rod of the second telescopic cylinder away from the cylinder body is hinged to the swing arm 33. The extension and retraction of the second telescopic cylinder causes the swing arm 33 to swing, and the swing of the swing arm 33 drives the third cover plate 13 and the fourth cover plate 14 to move on the hatch, thereby closing and opening the hatch. In this embodiment, the stop member 52 is a threaded part, such as a screw or bolt. When the third cover plate 13 and the fourth cover plate 14 are in the open position, the stop 52 is tightened into the stop plate 51 to lock the third cover plate 13, the fourth cover plate 14 and the swing arm together, preventing the third cover plate 13 and the fourth cover plate 14 from accidentally sliding on the hatch. When it is necessary to close the third cover plate 13 and the fourth cover plate 14, the stop 52 is manually unscrewed from the stop plate 51 to release the restriction on the fourth cover plate 14, and then the second drive 32 is used to drive the fourth cover plate 14 and the third cover plate 13 to move.

[0046] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0049] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A ship hatch cover mechanism, characterized in that ,include: The guide rail has two rails, which are respectively set on the top of the enclosure on both sides of the hatch in the first direction. The guide rail extends along a second direction, which forms an angle with the first direction. A cover plate assembly for covering a hatch having a front end and a rear end in a second direction. The cover plate assembly includes a first cover plate, a second cover plate, a third cover plate, and a fourth cover plate that are sequentially hinged in the second direction. The side of the first cover plate away from the second cover plate is rotatably connected to the front end of the hatch. The second cover plate and the fourth cover plate are each provided with rollers on both sides of the hatch in the first direction. The rollers are respectively rolled on corresponding guide rails and are capable of rolling along the extension direction of the guide rails. The second cover plate has ear plates protruding on both sides in the first direction. The drive assembly has two sets, which are respectively located on opposite sides of the hatch in the first direction. Each set of the drive assembly includes a first drive member and a second drive member. The first drive member is used to drive the first cover plate to rotate relative to the hatch, and the second drive member is used to drive the third cover plate to rotate relative to the hatch. A first limiting member, comprising a limiting plate, is rotatably mounted on the enclosure on the side of the hatch located in the first direction. The limiting plate is provided with a hook and a pull chain. The limiting plate can swing between a first position and a second position, and the limiting plate always has a tendency to swing toward the first position. When the second cover is in the open position, the limiting plate is in the first position, and the hook can engage with the ear plate to restrict the movement of the second cover relative to the hatch. The pull chain is used to drive the limiting plate to swing to the second position so that the hook can disengage from the ear plate. The first limiting member further includes a fixing seat, which is fixed to the enclosure on the side of the hatch in the first direction. The fixing seat is rotatably connected to the limiting plate through a first rotating shaft, and the limiting plate is located between the fixing seat and the enclosure.

2. A ship hatch cover mechanism according to claim 1, characterised in that, The first rotating shaft is connected to the non-end of the limiting plate. The two opposite ends of the limiting plate in the length direction are the first end and the second end, respectively. The first end faces the end of the hatch, and the second end faces the beginning of the hatch. The weight of the portion of the limiting plate from the first end to the first rotating shaft is M1, and the weight of the portion of the limiting plate from the second end to the first rotating shaft is M2, where M1 ≥ M2.

3. A ship hatch cover mechanism according to claim 1, characterized in that, The ear plate has a protruding hook protrusion at one end away from the second cover plate for the hook to engage with, and the fixing seat has a protruding limiting part. The hook and the limiting part form a receiving position to accommodate the hook protrusion.

4. The ship hatch cover mechanism according to claim 3, characterized in that, A blocking plate is provided on the limiting plate, and the blocking plate is rotatably connected to the limiting plate. The blocking plate has a third position and a fourth position, and the blocking plate can swing between the third position and the fourth position. The blocking plate always has a tendency to swing towards the third position. When the blocking plate is in the third position, one end of the blocking plate abuts against the end face of the hook protrusion away from the second cover plate to prevent the limiting plate from approaching the ear plate. When the blocking plate is in the fourth position, one end of the blocking plate releases its abutment against the hook protrusion.

5. A ship hatch cover mechanism according to claim 4, characterised in that, The non-end of the blocking plate is rotatably connected to the limiting plate via a second rotating shaft. The limiting plate is also provided with a limiting protrusion spaced apart from the second rotating shaft. The limiting protrusion is used to abut against the blocking plate to limit the blocking plate to the third position. The two opposite ends of the blocking plate in the length direction are the third end and the fourth end, respectively. The third end can abut against the hooking protrusion. The weight of the blocking plate from the third end to the second rotating shaft is M3, and the weight of the blocking plate from the fourth end to the second rotating shaft is M4, where M4 > M3.

6. A ship hatch cover mechanism according to claim 4, characterised in that, The hook portion is provided with a guide slope at one end near the second cover plate, and the guide slope slopes downward from the front end of the hatch toward the rear end.

7. A ship hatch cover mechanism according to claim 3, characterised in that, The end face of the hook protrusion facing away from the second cover plate has a convex arc structure.

8. Ship hatch cover mechanism according to any one of claims 1 to 7, characterized in that It also includes a second limiting member, which includes a stop plate and a stop member. The second driving member includes a second telescopic cylinder and a swing arm hinged to the second telescopic cylinder. One end of the swing arm is rotatably connected to a side panel of the hatch in the first direction, and the other end of the swing arm is rotatably connected to the third cover plate. The stop plate protrudes from one side of the fourth cover plate. When the swing arm drives the third cover to the open position, the stop member is tightened in the stop plate to restrict the movement of the fourth cover plate.

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