A seamless telescopic gangway

Abstract

A seamless telescopic gangway includes a fixed section and a movable section, which are reciprocatingly slidingly connected. A telescopic transmission device is located below both the fixed and movable sections. This device includes a small transmission sprocket set and a large transmission sprocket set. The small transmission sprocket set is connected to the movable section, driving its reciprocating sliding. The large transmission sprocket set rotates synchronously in opposite directions. One end of a conveyor belt is fixed to the large transmission sprocket set, pulling it back and forth. The other end extends around the far end of the movable section and is fixed to one end of the fixed section. In application, the conveyor belt is integrated into the working surface, concealing the gaps and relative sliding of the movable section. The synchronous counter-rotation of the large transmission sprocket set pulls any excess conveyor belt length to the bottom, solving the problem of conveyor belt redundancy caused by telescopic movement, while also reducing volume and safety hazards. Therefore, this design offers high safety.

Description

Technical Field

[0001] This invention relates to a ship gangway, belonging to the field of marine equipment, and particularly to a seamless telescopic gangway. Background Technology

[0002] The gangway is the main facility for passengers to safely board and disembark between a ship and an offshore platform. The marine environment is complex and changeable. Under the influence of wind, waves, and currents, the hull of the maintenance work boat / sightseeing boat will experience violent rolling, pitching, heave, and other multi-degree-of-freedom movements. Therefore, it is difficult and dangerous for passengers to transfer or board the platform, and safety accidents occur from time to time.

[0003] Typically, gangways are of fixed length. During ship berthing, the skill of the ship's navigators is crucial. The gangway can only be positioned after the designated berthing distance has been reached, allowing passengers to board. Extendable gangways offer a simple and effective way to compensate for this single degree of freedom (length). Combined with compensation for other degrees of freedom, this ensures safe and efficient boarding. However, the flatness of the working surface remains a critical issue. If the working surface cannot be kept taut, safety hazards persist. Common two-section telescopic gangways have two working sections, which can lead to relative sliding. Furthermore, the contact area contains steps and gaps, making it easy for passengers to get their feet caught in the gaps or their legs torn apart. These designs are rarely used in practice. Therefore, a seamless, non-slip telescopic gangway is urgently needed to address safety issues during boarding.

[0004] Patent application No. 202211690684.3, filed on December 27, 2022, discloses a telescopic belt scale, comprising: a protective frame; a material transfer roller assembly, including a first roller, a second roller, and a telescopic component, wherein the two ends of the first roller are slidably connected to the protective frame, the two ends of the second roller are fixedly connected to the protective frame, and the telescopic component includes a fixed part and a movable part that telescopically extends relative to the fixed part; an anti-loosening roller assembly, disposed below the material transfer roller assembly, including a third roller; and a conveyor belt, surrounding the material transfer roller assembly and... The anti-loosening roller assembly is fitted onto at least the first, second, and third rollers; the weighing assembly is located between the conveyor belt and the material transfer roller assembly. Although the equipment is seamless and has no relative sliding, it addresses the issue of belt length during extension by using rollers to press down and conceal the excess length in the vertical space. However, this significantly increases the size of the equipment, and a large gap needs to be provided between the gangway and the hull for its movement. The increased gap leads to higher safety risks and lower safety. Therefore, this design is not suitable for use on ships.

[0005] The information disclosed in this background section is intended only to enhance understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects and problems of low safety in the prior art and to provide a seamless telescopic gangway with higher safety.

[0007] To achieve the above objectives, the technical solution of the present invention is: a seamless telescopic gangway, the gangway comprising a fixed section and a movable section, the movable section and the fixed section being reciprocated slidingly connected, and a telescopic transmission device being provided below the fixed section and the movable section;

[0008] The telescopic transmission device includes a small transmission sprocket set and a large transmission sprocket set; the small transmission sprocket set includes a first small sprocket and a second small sprocket that rotate synchronously, and the large transmission sprocket set includes a first large sprocket and a second large sprocket that rotate synchronously. The first small sprocket is connected to the first large sprocket. The first small sprocket drives the movable section to slide back and forth and drives the first large sprocket to rotate synchronously in the opposite direction.

[0009] One end of the conveyor belt is fixed on the large transmission sprocket assembly. The first large sprocket pulls one end of the conveyor belt to move back and forth. The other end of the conveyor belt extends around the far end of the moving section to the fixed section and is fixed to one end of the fixed section.

[0010] The first small sprocket and the second small sprocket are located at opposite ends of the same horizontal line. Small chains are tensioned and sleeved on the first small sprocket and the second small sprocket. The first small sprocket drives the small chain to drive the second small sprocket to rotate synchronously.

[0011] A first connecting plate is fixed to the small chain, and the first connecting plate is fixedly connected to the movable section.

[0012] The first connecting plate is fixed to the top surface of the small chain, and its reciprocating travel range is located in the area between the first small sprocket and the second small sprocket.

[0013] The first large sprocket and the second large sprocket are located at opposite ends of the same horizontal line. Large chains are tensioned and fitted on the first large sprocket and the second large sprocket. The first large sprocket drives the large chain to drive the second large sprocket to rotate synchronously.

[0014] A second connecting plate is fixed on the large chain, and the second connecting plate is fixedly connected to one end of the conveyor belt.

[0015] The second connecting plate is fixed to the bottom surface of the large chain, and its reciprocating travel range is located in the area between the first large sprocket and the second large sprocket.

[0016] A drive motor is provided at the shaft of the first small sprocket. The key shaft of the drive motor is connected to the first small sprocket, and a first reversing gear is coaxially connected to the key shaft. A second reversing gear is coaxially connected at the shaft of the first large sprocket. The first reversing gear and the second reversing gear mesh with each other. The drive motor drives the first reversing gear to rotate and drives the second reversing gear to rotate synchronously in the opposite direction.

[0017] The first small sprocket and the second small sprocket have the same diameter, the first large sprocket and the second large sprocket have the same diameter, and the pitch circle diameter of the first large sprocket is proportional to the pitch circle diameter of the first small sprocket.

[0018] One end of the fixed section is provided with a hinge, and the fixed section is hinged to the side of the ship through the hinge.

[0019] A lifting device is provided at the bottom of the fixed section. One end of the lifting device is hinged to the bottom of the fixed section, and the other end of the lifting device is hinged to the side of the ship.

[0020] The far end is provided with a roller structure, the axis of the roller structure is fixed to the end of the far end, the outer arc surface of the roller structure protrudes from the end of the far end, the other end of the conveyor belt passes around the outer arc surface of the roller structure and successively covers the moving section and the fixed section, and is fixed to one end of the fixed section.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The present invention discloses a seamless telescopic gangway, comprising a fixed section and a movable section, the movable section and the fixed section being reciprocatingly slidingly connected. A telescopic transmission device is provided below the fixed section and the movable section; the telescopic transmission device includes a small transmission sprocket set and a large transmission sprocket set; the small transmission sprocket set includes a first small sprocket and a second small sprocket that rotate synchronously, and the large transmission sprocket set includes a first large sprocket and a second large sprocket that rotate synchronously. The first small sprocket is connected to the first large sprocket, the first small sprocket drives the movable section to reciprocate and slide, and drives the first large sprocket to rotate synchronously in the opposite direction; a [missing information - likely a device or mechanism] is fixed on the large transmission sprocket set. At one end of the conveyor belt, a large sprocket pulls it back and forth. The other end of the conveyor belt extends around the far end of the moving section towards the fixed section and is fixed to one end of the fixed section. In application, this design integrates the conveyor belt onto the working surface of the gangway, making it a single unit that covers the gaps and relative sliding of the moving section. Furthermore, the synchronous reverse rotation of the large transmission sprockets pulls the excess length of the conveyor belt to the bottom for concealment, solving the problem of conveyor belt redundancy caused by extension and retraction. This ensures the working surface is always taut, while also reducing volume and safety hazards. Therefore, this invention offers high safety.

[0023] 2. In this invention, a seamless telescopic gangway comprises two small sprockets located at opposite ends of the same horizontal line, with small chains tensioned on them. The first small sprocket drives the small chain, which in turn drives the second small sprocket to rotate synchronously. A first connecting plate is fixed to the small chain and is fixedly connected to the movable section. Similarly, a first large sprocket and a second large sprocket are located at opposite ends of the same horizontal line, with large chains tensioned on them. The first large sprocket drives the large chain, which in turn drives the second large sprocket to rotate synchronously. A second connecting plate is fixed to the large chain and is fixedly connected to one end of the conveyor belt. In application, this design allows the two sprocket devices to operate synchronously, ensuring that the length of the conveyor belt changes synchronously with the length of the gangway. Passengers standing on the gangway only contact the conveyor belt, which separates them from the telescopic gangway body, preventing accidents such as feet getting stuck or legs tearing apart. This reduces the risk of accidents and improves safety. Therefore, this invention offers high safety.

[0024] 3. In this invention, a seamless telescopic gangway has the same diameter for the first and second small sprockets, and the same diameter for the first and second large sprockets. The pitch circle diameter of the first large sprocket is proportional to the pitch circle diameter of the first small sprocket. In application, to address the issue of asynchronous telescopic movement caused by inconsistent travel diameters of the large and small sprockets, their pitch circle diameters are set to be multiples of each other. This solves the synchronization problem of the conveyor belt, ensures its flatness, and reduces safety hazards. Therefore, this invention offers high safety. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention in its retracted state.

[0026] Figure 2 This is a schematic diagram of the structure of the present invention in its extended state.

[0027] Figure 3 This is a top view of the fixed segment and the movable segment in this invention.

[0028] Figure 4 This is a top view of the conveyor belt in this invention.

[0029] Figure 5 This is a schematic diagram of the small transmission sprocket assembly in this invention.

[0030] Figure 6 This is a schematic diagram of the structure of the large transmission sprocket assembly in this invention.

[0031] Figure 7 This is a schematic diagram of the small transmission sprocket set and the large transmission sprocket set in this invention.

[0032] Figure 8 This is a schematic diagram of the travel range of the first connecting plate in this invention.

[0033] Figure 9 This is a schematic diagram of the travel range of the second connecting plate in this invention.

[0034] In the diagram: Fixed section 1, movable section 2, remote end 21, telescopic transmission device 3, small transmission sprocket set 4, first small sprocket 41, second small sprocket 42, small chain 43, first connecting plate 44, drive motor 45, key shaft 451, first reversing gear 46, second reversing gear 47, large transmission sprocket set 5, first large sprocket 51, second large sprocket 52, large chain 53, second connecting plate 54, conveyor belt 6, hinge 7, lifting device 8, roller structure 9. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] See Figure 1 — Figure 9 A seamless telescopic gangway, comprising a fixed section 1 and a movable section 2, wherein the movable section 2 is reciprocatingly slidingly connected to the fixed section 1, and a telescopic transmission device 3 is provided below the fixed section 1 and the movable section 2.

[0037] The telescopic transmission device 3 includes a small transmission sprocket group 4 and a large transmission sprocket group 5; the small transmission sprocket group 4 includes a first small sprocket 41 and a second small sprocket 42 that rotate synchronously, and the large transmission sprocket group 5 includes a first large sprocket 51 and a second large sprocket 52 that rotate synchronously. The first small sprocket 41 is connected to the first large sprocket 51. The first small sprocket 41 drives the movable section 2 to slide back and forth and drives the first large sprocket 51 to rotate synchronously in the opposite direction.

[0038] One end of the conveyor belt 6 is fixed on the large transmission sprocket group 5. The first large sprocket 51 pulls one end of the conveyor belt 6 to move back and forth. The other end of the conveyor belt 6 extends around the far end 21 of the movable section 2 to the fixed section 1 and is fixed to one end of the fixed section 1.

[0039] The first small sprocket 41 and the second small sprocket 42 are located at opposite ends of the same horizontal line. The first small sprocket 41 and the second small sprocket 42 are tensioned and fitted with small chains 43. The first small sprocket 41 drives the small chains 43 to drive the second small sprocket 42 to rotate synchronously.

[0040] A first connecting plate 44 is fixed on the small chain 43, and the first connecting plate 44 is fixedly connected to the movable segment 2.

[0041] The first connecting plate 44 is fixed to the top surface of the small chain 43, and its reciprocating travel range is located in the area between the first small sprocket 41 and the second small sprocket 42.

[0042] The first large sprocket 51 and the second large sprocket 52 are located at opposite ends of the same horizontal line. A large chain 53 is tensioned and fitted on the first large sprocket 51 and the second large sprocket 52. The first large sprocket 51 drives the large chain 53 to drive the second large sprocket 52 to rotate synchronously.

[0043] A second connecting plate 54 is fixed on the large chain 53, and the second connecting plate 54 is fixedly connected to one end of the conveyor belt 6.

[0044] The second connecting plate 54 is fixed to the bottom surface of the large chain 53, and its reciprocating travel range is located in the area between the first large sprocket 51 and the second large sprocket 52.

[0045] A drive motor 45 is provided at the shaft center of the first small sprocket 41. The key shaft 451 of the drive motor 45 is connected to the first small sprocket 41. A first reversing gear 46 is coaxially connected to the key shaft 451. A second reversing gear 47 is coaxially connected at the shaft center of the first large sprocket 51. The first reversing gear 46 and the second reversing gear 47 mesh with each other. The drive motor 45 drives the first reversing gear 46 to rotate and drives the second reversing gear 47 to rotate synchronously in the opposite direction.

[0046] The first small sprocket 41 and the second small sprocket 42 have the same diameter, the first large sprocket 51 and the second large sprocket 52 have the same diameter, and the pitch circle diameter of the first large sprocket 51 is proportional to the pitch circle diameter of the first small sprocket 41.

[0047] One end of the fixed section 1 is provided with a hinge 7, and the fixed section 1 is hinged to the side of the ship through the hinge 7.

[0048] A lifting device 8 is provided at the bottom of the fixed section 1. One end of the lifting device 8 is hinged to the bottom of the fixed section 1, and the other end of the lifting device 8 is hinged to the side of the ship.

[0049] The remote end 21 is provided with a roller structure 9, the axis of the roller structure 9 is fixed to the end of the remote end 21, the outer arc surface of the roller structure 9 protrudes from the end of the remote end 21, the other end of the conveyor belt 6 passes around the outer arc surface of the roller structure 9 and sequentially covers the movable section 2 and the fixed section 1, and is fixed to one end of the fixed section 1.

[0050] The principle of this invention is explained as follows:

[0051] In this invention, the movable section 2 and the fixed section 1 are connected by a reciprocating sliding fit. The connection form can be any form such as a segmented slide rail. Foldable handrails are provided on both sides of the movable section 2 and the fixed section 1. The specific structure can be adapted without limitation as long as it does not affect the normal operation of this design.

[0052] Example 1:

[0053] See Figure 1 — Figure 9 A seamless telescopic gangway includes a fixed section 1 and a movable section 2, which are reciprocatingly slidingly connected to the fixed section 1. A telescopic transmission device 3 is provided below the fixed section 1 and the movable section 2. The telescopic transmission device 3 includes a small transmission sprocket set 4 and a large transmission sprocket set 5. The small transmission sprocket set 4 includes a first small sprocket 41 and a second small sprocket 42 that rotate synchronously. The large transmission sprocket set 5 includes a first large sprocket 51 and a second large sprocket 52 that rotate synchronously. The first small sprocket 41 is connected to the first large sprocket 51. The first small sprocket 41 drives the movable section 2 to slide reciprocally and drives the first large sprocket 51 to rotate synchronously in the opposite direction. One end of a conveyor belt 6 is fixed on the large transmission sprocket set 5. The first large sprocket 51 pulls one end of the conveyor belt 6 to move reciprocally. The other end of the conveyor belt 6 extends past the far end 21 of the movable section 2 to the fixed section 1 and is fixed to one end of the fixed section 1.

[0054] In application, when extension is required, the first small sprocket 41 drives the second small sprocket 42 to rotate synchronously, thereby driving the small transmission sprocket group 4 to rotate clockwise, which in turn drives the connected movable section 2 to slide out. At the same time, the first small sprocket 41 drives the first large sprocket 51 to rotate counterclockwise, synchronously releasing the length of the conveyor belt 6, so that the length of the conveyor belt 6 extends synchronously with the extension of the movable section 2, maintaining a taut state.

[0055] When retraction is required, the small transmission sprocket set 4 rotates counterclockwise, thereby driving the connected movable section 2 to slide back. At the same time, the large transmission sprocket set 5 rotates clockwise, synchronously pulling the conveyor belt 6 back and hiding it at the bottom of the gangway. This design ensures a seamless and flat working surface of the gangway, reducing safety hazards caused by gaps, steps, etc. for boarding personnel.

[0056] Example 2:

[0057] The basic content is the same as in Example 1, except that:

[0058] The first small sprocket 41 and the second small sprocket 42 are located at opposite ends of the same horizontal line. A small chain 43 is tensioned and fitted onto the first small sprocket 41 and the second small sprocket 42. The first small sprocket 41 drives the small chain 43 to drive the second small sprocket 42 to rotate synchronously. A first connecting plate 44 is fixed to the small chain 43 and is fixedly connected to the movable section 2. The first connecting plate 44 is fixed to the top surface of the small chain 43, and its reciprocating travel range is within the area between the first small sprocket 41 and the second small sprocket 42. The first large sprocket 51 and the second large sprocket 52 are located at opposite ends of the same horizontal line. A large chain 53 is tensioned and fitted onto the first large sprocket 51 and the second large sprocket 52. The first large sprocket 51 drives the large chain 53 to drive the second large chain 52. The wheel 52 rotates synchronously; a second connecting plate 54 is fixed on the large chain 53, and the second connecting plate 54 is fixedly connected to one end of the conveyor belt 6; the second connecting plate 54 is fixed to the bottom surface of the large chain 53, and its reciprocating travel range is located in the area between the first large sprocket 51 and the second large sprocket 52; a drive motor 45 is provided at the shaft center of the first small sprocket 41, the key shaft 451 of the drive motor 45 is connected to the first small sprocket 41, and a first reversing gear 46 is coaxially connected to the key shaft 451; a second reversing gear 47 is coaxially connected at the shaft center of the first large sprocket 51, the first reversing gear 46 and the second reversing gear 47 mesh with each other, and the drive motor 45 drives the first reversing gear 46 to rotate and drives the second reversing gear 47 to rotate synchronously in the opposite direction.

[0059] In application, the drive motor 45 drives the first small sprocket 41 and the second small sprocket 42 to rotate, and simultaneously drives the first reversing gear 46 to rotate. The rotation of the first reversing gear 46 drives the second reversing gear 47, which is meshed with it, to rotate in the opposite direction, and drives the first large sprocket 51 and the second large sprocket 52 to rotate in the opposite direction, so as to achieve synchronous drive of the extension and retraction of the movable section 2 and the release of the conveyor belt 6, and maintain the tension of the conveyor belt 6. The reciprocating travel range of the first connecting plate 44 and the second connecting plate 54 is located between the two end sprockets connected to them, ensuring that the movable section 2 and the conveyor belt 6 do not exceed the formation range, so as to ensure the safe operation of the machine.

[0060] Example 3:

[0061] The basic content is the same as in Example 2, except that:

[0062] The first small sprocket 41 and the second small sprocket 42 have the same diameter, the first large sprocket 51 and the second large sprocket 52 have the same diameter, and the pitch circle diameter of the first large sprocket 51 is proportional to the pitch circle diameter of the first small sprocket 41 (preferably, the pitch circle diameter of the first large sprocket 51 is twice that of the first small sprocket 41).

[0063] In application, the pitch circle diameter of the first large sprocket 51 is larger than that of the first small sprocket 41 because it has to support the conveyor belt 6. This leads to the problem of asynchronous travel distance between the two. Therefore, the pitch circle diameter of the first large sprocket 51 is twice that of the first small sprocket 41 to ensure that the conveyor belt 6 is laid out synchronously when the movable end 2 extends and is rolled back synchronously when it retracts, thus ensuring synchronous tension of the conveyor belt 6.

[0064] Example 4:

[0065] The basic content is the same as in Example 3, except that:

[0066] A hinge 7 is provided at one end of the fixed section 1, and the fixed section 1 is hinged to the side of the ship via the hinge 7; a lifting device 8 is provided at the bottom of the fixed section 1, one end of the lifting device 8 is hinged to the bottom of the fixed section 1, and the other end of the lifting device 8 is hinged to the side of the ship.

[0067] In application, the gangway can be folded and stored on the side of the ship via hinge 7. Hinge 7 can be a hinge or other form. When needed, it can be lifted and extended by lifting device 8 to adjust the angle of the gangway and provide support. Lifting device 8 can be hydraulic, spring-type or other form. In this process, it can also be set to work in conjunction with telescopic transmission device 3 to extend synchronously while being lifted, thereby improving the operating efficiency of the device.

[0068] Example 5:

[0069] The basic content is the same as in Example 4, except that:

[0070] The remote end 21 is provided with a roller structure 9, the axis of the roller structure 9 is fixed to the end of the remote end 21, the outer arc surface of the roller structure 9 protrudes from the end of the remote end 21, the other end of the conveyor belt 6 passes around the outer arc surface of the roller structure 9 and sequentially covers the movable section 2 and the fixed section 1, and is fixed to one end of the fixed section 1.

[0071] In application, the roller structure 9 is located at the far end 21 of the movable section 2 and moves with the extension and retraction of the movable section 2. It can be active or passive. The conveyor belt 6 is laid around the outer arc surface of the roller structure 9. On the one hand, this makes the extension and rewind of the conveyor belt 6 smoother, and on the other hand, it can reduce the wear of the conveyor belt 6 during the extension and rewinding movement, and extend the service life of the conveyor belt 6.

[0072] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A seamless telescopic gangway, characterized in that: The gangway includes a fixed section (1) and a movable section (2). The movable section (2) and the fixed section (1) are connected by a reciprocating sliding fit. A telescopic transmission device (3) is provided below the fixed section (1) and the movable section (2). The telescopic transmission device (3) includes a small transmission sprocket group (4) and a large transmission sprocket group (5); the small transmission sprocket group (4) includes a first small sprocket (41) and a second small sprocket (42) that rotate synchronously, and the large transmission sprocket group (5) includes a first large sprocket (51) and a second large sprocket (52) that rotate synchronously. The first small sprocket (41) and the first large sprocket (51) are connected by gears, and the first small sprocket (41) and the first large sprocket (51) are located on the same horizontal line. The first small sprocket (41) drives the movable section (2) to slide back and forth, and drives the first large sprocket (51) to rotate synchronously in the opposite direction. One end of the conveyor belt (6) is fixed on the large transmission sprocket group (5). The first large sprocket (51) pulls one end of the conveyor belt (6) to move back and forth. The other end of the conveyor belt (6) extends around the far end (21) of the moving section (2) to the fixed section (1) and is fixed to one end of the fixed section (1). The first small sprocket (41) and the second small sprocket (42) are located at the two ends of the same horizontal line. The first small sprocket (41) and the second small sprocket (42) are tensioned with small chains (43). The first small sprocket (41) drives the small chains (43) to drive the second small sprocket (42) to rotate synchronously. A first connecting plate (44) is fixed on the small chain (43), and the first connecting plate (44) is fixedly connected to the movable segment (2); The small transmission sprocket group (4) operates synchronously with the large transmission sprocket group (5), and the length of the conveyor belt (6) changes synchronously with the length of the gangway.

2. The seamless telescopic gangway according to claim 1, characterized in that: The first connecting plate (44) is fixed to the top surface of the small chain (43), and its reciprocating travel range is located in the area between the first small sprocket (41) and the second small sprocket (42).

3. A seamless telescopic gangway according to claim 2, characterized in that: The first large sprocket (51) and the second large sprocket (52) are located at the two ends of the same horizontal line. A large chain (53) is tensioned on the first large sprocket (51) and the second large sprocket (52). The first large sprocket (51) drives the large chain (53) to drive the second large sprocket (52) to rotate synchronously. A second connecting plate (54) is fixed on the large chain (53), and the second connecting plate (54) is fixedly connected to one end of the conveyor belt (6).

4. A seamless telescopic gangway according to claim 3, characterized in that: The second connecting plate (54) is fixed to the bottom surface of the large chain (53), and its reciprocating travel range is located in the area between the first large sprocket (51) and the second large sprocket (52).

5. A seamless telescopic gangway according to claim 1, 2 or 3, characterized in that: A drive motor (45) is provided at the shaft of the first small sprocket (41). The key shaft (451) of the drive motor (45) is connected to the first small sprocket (41). A first reversing gear (46) is coaxially connected to the key shaft (451). A second reversing gear (47) is coaxially connected at the shaft of the first large sprocket (51). The first reversing gear (46) and the second reversing gear (47) mesh with each other. The drive motor (45) drives the first reversing gear (46) to rotate and drives the second reversing gear (47) to rotate synchronously in the opposite direction.

6. A seamless telescopic gangway according to claim 1, 2 or 3, characterized in that: The first small sprocket (41) and the second small sprocket (42) have the same diameter, the first large sprocket (51) and the second large sprocket (52) have the same diameter, and the pitch circle diameter of the first large sprocket (51) is proportional to the pitch circle diameter of the first small sprocket (41).

7. A seamless telescopic gangway according to claim 1, 2 or 3, characterized in that: One end of the fixed section (1) is provided with a hinge (7), and the fixed section (1) is hinged to the side of the ship through the hinge (7).

8. A seamless telescopic gangway according to claim 1, 2 or 3, characterized in that: A lifting device (8) is provided at the bottom of the fixed section (1). One end of the lifting device (8) is hinged to the bottom of the fixed section (1), and the other end of the lifting device (8) is hinged to the side of the ship.

9. A seamless telescopic gangway according to claim 1, 2 or 3, characterized in that: The far end (21) is provided with a roller structure (9), the axis of the roller structure (9) is fixed to the end of the far end (21), the outer arc surface of the roller structure (9) protrudes from the end of the far end (21), the other end of the conveyor belt (6) passes around the outer arc surface of the roller structure (9) and sequentially covers the moving section (2) and the fixed section (1), and is fixed to one end of the fixed section (1).

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