A convertible trestle applied to a full-rotation tug

Abstract

The application discloses a conversion type gangway applied to a full-rotation tugboat, which comprises a forecastle connecting piece, a bridge connecting piece and a middle extension connecting piece, wherein the forecastle connecting piece comprises a forecastle deformation support piece, a deformation power piece and an auxiliary support piece, the forecastle deformation support piece, the deformation power piece and the auxiliary support piece are arranged on a forecastle deck, the bridge connecting piece is symmetrical to the forecastle connecting piece and has the same structure as the forecastle connecting piece, and the middle extension connecting piece comprises a first middle extension connecting piece and a second middle extension connecting piece, the first middle extension connecting piece is arranged on the forecastle connecting piece, and the second middle extension connecting piece is arranged on the bridge connecting piece. The application has the advantages of high automation degree, good safety for crew passing, strong adaptability to sea conditions, automatic conversion into a straight-through gangway between a bridge deck and a forecastle deck or a gangway connected through an anchor machine platform according to the sea condition, reduction of the gangway height according to the operation requirement of the tugboat and satisfaction of various towing operations.

Description

Technical Field

[0001] The present invention relates to the technical field of ship equipment, and more particularly to a conversion type trestle applied to a fully revolving tugboat. Background Art

[0002] Due to the special functionality of fully revolving tugboats, personnel frequently use the forecastle deck during pushing operations. On conventional tugboats, crew members often need to first access the forecastle deck via the inclined ladder at the front of the windlass platform to the anchor winch platform, and then use the inclined ladder at the rear of the anchor winch platform to access the forecastle deck to carry out operations. This is relatively inefficient and affects the tugboat's operational efficiency. Furthermore, frequently ascending and descending the inclined ladder on a swaying tugboat also poses a safety hazard to the crew. Summary of the Invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a convertible trestle for use with a fully revolving tugboat, which specifically adopts the following technical solutions:

[0004] A convertible trestle bridge applied to a fully rotating tugboat, comprising:

[0005] A forecastle connecting member is provided on the forecastle deck and includes a forecastle deformable support member, a deformable power member, and an auxiliary support member. The forecastle deformable support member, the deformable power member, and the auxiliary support member are all provided on the forecastle deck, and the deformable power member drives the forecastle deformable support member to deform and support.

[0006] a bridge connector, which is provided on the side of the bridge deck and has the same structure as the forecastle connector, and the bridge connector is symmetrical to the forecastle connector;

[0007] a middle extension connector, which is provided on the forecastle connector and the bridge connector, and includes a first middle extension connector and a second middle extension connector, wherein the first middle extension connector is provided on the forecastle connector, the second middle extension connector is provided on the bridge connector, and the first middle extension connector and the second middle extension connector are connected to each other;

[0008] The forefloor deformation support member includes a left forefloor support member, a right forefloor support member and a pedal, the left forefloor support member and the right forefloor support member are both arranged on the forefloor deck, and the pedal is arranged on the left forefloor support member and the right forefloor support member; the left forefloor support member includes a forefloor support deformation member and a forefloor protective member, the forefloor support deformation member is arranged on the forefloor deck, and the forefloor protective member is arranged on the forefloor support deformation member; the forefloor support deformation member includes a fixed support frame, an upper support rod, a lower support rod and a movable support frame, the fixed support frame is in the shape of a right-angle block, and the fixed support frame is fixedly arranged on the side of the forefloor deck at a right angle, and one end of the upper support rod is connected to the other right-angled side of the fixed support frame by a connecting shaft, and the lower support One end of the support rod is hinged on a right-angled side of the fixed support frame; the movable support frame is in the shape of a right-angled block, and the right-angled side of the movable support frame is hinged on the lower support rod, and the other right-angled side of the movable support frame is hinged on the upper support rod, and multiple movable support frames are evenly spaced along the axial direction of the upper support rod; the first middle extension connecting member includes a first connecting support rod, a first pedal, a first handrail support rod and a first handhold rod, one end of the first connecting support rod is hinged on the other end of the upper support rod, and one end of the other first connecting support rod is hinged on the other end of the upper support rod of the right first floor support member; the two ends of the first pedal are respectively arranged on the two first connecting support rods, and multiple first pedals are evenly spaced along the axial direction of the first connecting support rod. The cam is connected to the second support rod by the second step, and the cam is connected to the first support rod by the second step. On the right front building support of the bridge building connector; sliding blocks are respectively provided on both ends of the second pedal board, and the second pedal board is embedded in the sliding grooves of the two second connecting support rods one by one through the sliding blocks at both ends; multiple second pedals are evenly distributed on the second connecting support rod, and adjacent second pedals are connected by a first chain, while the second pedal board at one end is connected to the first connecting support rod through a second chain, and the second pedal board at the other end is connected to the bridge building connector through a third chain; one end of the second handrail support rod is arranged on the second connecting support rod, and the third handrail support rod is arranged on the other end of the second handrail support rod, and one end of the third handrail support rod is inserted into the tube at the other end of the first handrail support rod.

[0009] Preferably, the foreground protection member includes a transmission rod and a transmission handrail, one end of the transmission rod is hinged to the upper support rod and the lower support rod respectively, and the transmission handrail is hinged to the other end of the transmission rod.

[0010] Preferably, the right forefloor support member has the same structure as the left forefloor support member, the right forefloor support member is arranged on the forefloor deck, and the right forefloor support member is symmetrically distributed parallel to the left forefloor support member; the plurality of pedals are correspondingly arranged on the fixed support frame and the fixed support frame of the right forefloor support member, and are correspondingly arranged on the movable support frame and the movable support frame of the right forefloor support member.

[0011] Preferably, the deformable power component includes a power motor, a worm, a first transmission shaft and a worm wheel. The power motor is arranged on the side of the forecastle deck, one end of the worm is arranged on the rotating shaft of the power motor, one end of the first transmission shaft is arranged on the connecting shaft, and the other end of the first transmission shaft is arranged on the connecting shaft of the right forecastle support component. The worm wheel is fixedly mounted on the first transmission shaft, and the worm wheel is engaged with the worm.

[0012] Preferably, the auxiliary support member includes a second transmission shaft and an automatic telescopic rod, one end of the second transmission shaft is arranged on the lower support rod, and the other end of the second transmission shaft is arranged on the lower support rod of the right foreground support member, the bottom end of the automatic telescopic rod is hinged on the side of the foreground deck, and the top end of the automatic telescopic rod is arranged on the second transmission shaft.

[0013] The present invention has at least the following beneficial effects:

[0014] 1) The convertible trestle used in the fully revolving tugboat has a high degree of automation, good crew safety, and strong adaptability to sea conditions. It can automatically transform into a straight trestle between the bridge deck and forecastle deck or into a trestle connected via an anchor winch platform according to sea conditions. The trestle height can also be lowered according to the needs of the tugboat operation to meet various towing operations.

[0015] 2) The convertible pier applied to the full-rotating tugboat of the present invention is provided with a forecastle connecting piece, a bridge connecting piece and a middle extension connecting piece. When the sea conditions are good, the forecastle connecting piece, the bridge connecting piece and the middle extension connecting piece together form a straight-through pier between the bridge deck and the forecastle deck, so that the crew can pass through the pier smoothly. When the sea conditions are bad and the crew needs to work on the forecastle deck, the forecastle connecting piece and the bridge connecting piece drive the middle extension connecting piece downward to fold to the surface of the windlass platform. At this time, the crew goes down to the windlass platform through the bridge connecting piece. The middle extension connector on the surface of the pier, and then from the middle extension connector to the forecastle deck through the forecastle connector. Since the crew members walk close to the bridge deck, the anchor winch platform and the forecastle deck during the entire process of passing the pier, the height of the crew members from the sea surface is significantly improved, thereby significantly reducing the degree of swaying of the crew members in severe sea conditions and significantly improving the safety of the crew members. The forecastle connector and the bridge connector that are lowered to the anchor winch platform also facilitate communication between the anchor winch platform and the forecastle deck, and between the anchor winch platform and the bridge deck.

[0016] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the convertible trestle bridge of the present invention applied to a fully revolving tugboat;

[0018] Figure 2 The present invention is applied to the conversion type trestle of the full-rotation tugboat Figure 1 A partial enlarged view of middle A;

[0019] Figure 3 A top view of the convertible trestle bridge of the present invention applied to a fully revolving tugboat;

[0020] Figure 4 This is a schematic diagram of the right side three-dimensional structure of the convertible trestle applied to a fully revolving tugboat according to the present invention;

[0021] Figure 5 The present invention is applied to the conversion type trestle of the full-rotation tugboat Figure 4 A partial enlarged view of B in the middle;

[0022] Figure 6 It is a schematic diagram of the left side stereoscopic structure of the conversion type trestle applied to the full-rotating tugboat according to the present invention.

[0023] Among them: 1-bridge connecting piece, 2-pedal, 3-fixed support frame, 4-upper support rod, 5-lower support rod, 6-movable support frame, 7-transmission rod, 8-transmission handrail, 9-power motor, 10-worm, 11-first transmission shaft, 12-worm gear, 13-second transmission shaft, 14-automatic telescopic rod, 15-first connecting support rod, 16-first pedal, 17-first handrail support rod, 18-first handhold rod, 19-second connecting support rod, 20-second pedal, 21-second handrail support rod, 22-third handhold rod, 23-fourth handhold rod, 24-forecastle deck, 25-bridge deck, 26-anchor windlass platform, 27-second handhold rod. DETAILED DESCRIPTION

[0024] The technical solutions of the present invention will be described in detail below by way of embodiments with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0025] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0026] according to Figures 1-6 As shown, a convertible pier used for a fully revolving tugboat includes a forecastle connector, a bridge connector 1 and a middle extension connector. The forecastle connector is arranged on the forecastle deck 24, the bridge connector 1 is arranged on the bridge deck 25, and the middle extension connector is arranged on the forecastle connector and the bridge connector 1.

[0027] The bow connection piece comprises a bow transformation support, a transformation power and an auxiliary support, which are arranged on the bow deck 24. The bow transformation support comprises a left bow support and a right bow support, which are arranged on the bow deck 24, and a footboard 2 arranged on the left bow support and the right bow support. The left bow support comprises a bow support transformation and a bow protection, wherein the bow support transformation is arranged on the bow deck 24, and the bow protection is arranged on the bow support transformation. The bow support transformation comprises a fixed support frame 3 arranged on the bow deck 24, an upper support rod 4 and a lower support rod 5 arranged on the fixed support frame 3, and a movable support frame 6 arranged on the upper support rod 4 and the lower support rod 5. The fixed support frame 3 is in the shape of a right-angle block, and is fixedly arranged on the side of the bow deck 24. One end of the upper support rod 4 is connected to the other right-angle side of the fixed support frame 3 through a connecting shaft, so that the upper support rod 4 can rotate around the other right-angle side of the fixed support frame 3 through the connecting shaft. One end of the lower support rod 5 is hingedly connected to the right-angle side of the fixed support frame 3, so that the lower support rod 5 can rotate around the right-angle side of the fixed support frame 3.

[0028] The movable support frame 6 is in the shape of a right-angle block, one right-angle side of the movable support frame 6 is hingedly connected to the lower support rod 5, so that the lower support rod 5 can rotate around the movable support frame 6, the other right-angle side of the movable support frame 6 is hingedly connected to the upper support rod 4, so that the upper support rod 4 can rotate around the other right-angle side of the movable support frame 6, and the other right-angle side of the movable support frame 6 is parallel to the other right-angle side of the fixed support frame 3. Three movable support frames 6 are arranged, and the three movable support frames 6 are distributed at equal intervals along the axis of the upper support rod 4.

[0029] The bow protection comprises a transmission rod 7 arranged on the bow support transformation and a transmission handrail 8 arranged on the transmission rod 7. One end of the transmission rod 7 is hingedly connected to the upper support rod 4 and the lower support rod 5 respectively, so that the transmission rod 7 can rotate at the hinged connection of the upper support rod 4 and the lower support rod 5. Two transmission rods 7 are arranged, and the two transmission rods 7 are distributed in parallel on the upper support rod 4 and the lower support rod 5. The transmission handrail 8 is hingedly connected to the other end of the two transmission rods 7, so that the transmission handrail 8 can relatively rotate around the other end of the transmission rod 7.

[0030] The right forecastle support has the same structure as the left forecastle support and is disposed on the forecastle deck 24. The right forecastle support is symmetrically arranged parallel to the left forecastle support. Multiple steps 2 are provided, each correspondingly disposed on the fixed support frame 3 and the fixed support frame 3 of the right forecastle support, and correspondingly disposed on the movable support frame 6 and the movable support frame 6 of the right forecastle support.

[0031] The deformable power unit includes a power motor 9, a worm 10, a first transmission shaft 11, and a worm gear 12. The power motor 9 is mounted on the forecastle deck 24, the worm 10 is mounted on the power motor 9, the first transmission shaft 11 is mounted on the forecastle deformable support, and the worm gear 12 is mounted on the first transmission shaft 11. The power motor 9 is fixed to the side of the forecastle deck 24, and one end of the worm 10 is fixed to the rotating shaft of the power motor 9. One end of the first transmission shaft 11 is horizontally fixed to the connecting shaft, and the other end of the first transmission shaft 11 is horizontally fixed to the connecting shaft of the right forecastle support. The worm gear 12 is fixedly mounted on the first transmission shaft 11 and meshes with the worm 10. This allows the power motor 9 to rotate the first transmission shaft 11 through the worm 10, and the first transmission shaft 11, through the connecting shaft, drives the upper support rod 4 to rotate about the other right-angled side of the fixed support frame 3. The rotating upper support rod 4 drives the lower support rod 5 and the transmission rod 7 to rotate respectively, thereby distributing the multiple pedals 2 in a stepped manner, and at the same time distributing the transmission handrails 8 on both sides of the pedals 2 for the crew to hold when going up and down the stairs.

[0032] The auxiliary support member includes a second transmission shaft 13 and an automatic telescopic rod 14. The second transmission shaft 13 is arranged on the lower support rod 5, and the automatic telescopic rod 14 is arranged on the forecastle deck 24. One end of the second transmission shaft 13 is arranged on the lower support rod 5, and the other end of the second transmission shaft 13 is arranged on the lower support rod 5 of the right forecastle support member, so that the second transmission shaft 13 can rotate on the lower support rod 5. The bottom end of the automatic telescopic rod 14 is hinged to the side of the forecastle deck 24, and the top end of the automatic telescopic rod 14 is fixedly arranged on the second transmission shaft 13. The auxiliary support member adaptively extends and contracts with the rotation of the power motor 9 to improve the load capacity of the forecastle support deformable member.

[0033] The bridge connector 1 has the same structure as the forecastle connector, and is arranged on the side of the bridge deck 25 and is symmetrical with the forecastle connector. The bridge connector 1 and the forecastle connector jointly support the middle extension connector.

[0034] The middle extension connector includes a first middle extension connector and a second middle extension connector. The first middle extension connector is arranged on the forecastle connector, and the second middle extension connector is arranged on the bridge connector 1. The first middle extension connector and the second middle extension connector are connected to each other.

[0035] The first central extension connector includes a first connecting support rod 15, a first stepping plate 16, a first handrail support rod 17, and a first grab bar 18. The first connecting support rod 15 is mounted on the first floor connector. The first stepping plate 16 and the first handrail support rod 17 are both mounted on the first connecting support rod 15, and the first grab bar 18 is mounted on the first handrail support rod 17. The first connecting support rod 15 is tubular and is provided in pairs. One end of the first connecting support rod 15 is hinged to the other end of the upper support rod 4, allowing the first connecting support rod 15 to rotate around the other end of the upper support rod 4. The other end of the first connecting support rod 15 is hinged to the other end of the upper support rod 4 of the right first floor support member. The first stepping plate 16 is rectangular and plate-shaped. The two ends of the first stepping plate 16 are respectively mounted on the two first connecting support rods 15. Multiple first stepping plates 16 are evenly spaced along the axis of the first connecting support rod 15. One end of the first handrail support rod 17 is fixedly mounted on the first connecting support rod 15, and multiple first handrail support rods 17 are evenly spaced axially along the first connecting support rod 15. The first handrail support rod 18 is tubular and horizontally fixedly mounted on the other ends of the multiple first handrail support rods 17. Furthermore, each first connecting support rod 15 is provided with both the first handrail support rod 17 and the first handrail support rod 18. Crew members holding the first handrail support rod 18 improve stability when stepping on the first stepping plate 16. Furthermore, a second handrail support rod 27 is connected to a breakpoint on the first handrail support rod 18, one end of which is hinged to the first handrail support rod 18. When a crew member needs to access the first mid-section extension connector from the anchor winch platform 26, they open the second handrail support rod 27, pass through the first handrail support rod 18, and then close the second handrail support rod 27 after stepping on the first stepping plate 16.

[0036] The second middle extension connecting member includes a second connecting support rod 19, a second pedal board 20, a second handrail support rod 21 and a third handhold rod 22. The second connecting support rod 19 is arranged on the bridge connecting member 1, and the second pedal board 20 and the second handrail support rod 21 are both arranged on the second connecting support rod 19.

[0037] The second connecting support rod 19 has a sliding groove on its side wall. One end of the second connecting support rod 19 is inserted into the tube at the other end of the first connecting support rod 15, and the other end of the second connecting support rod 19 is hinged to the left foreground support of the bridge connection component 1. This allows the second connecting support rod 19 to rotate around the bridge connection component 1. The two second connecting support rods 19 correspond one to one with the two first connecting support rods 15, and the other end of the other second connecting support rod 19 is hinged to the right foreground support of the bridge connection component 1. This allows the other second connecting support rod 19 to rotate around the right foreground support of the bridge connection component 1. Sliding blocks are respectively provided at both ends of the second pedal 20, and the length of the sliding blocks is greater than the width of the second pedal 20. The second pedal 20 is embedded in the sliding grooves of the two second connecting support rods 19 through the sliding blocks at both ends. Multiple second pedals are evenly distributed on the second connecting support rod 19, and adjacent second pedals are connected by a first chain. At the same time, the second pedal at one end is connected to the other end of the first connecting support rod 15 through a second chain, and the second pedal at the other end is connected to the bridge building connector 1 through a third chain.

[0038] When one end of the second connecting support rod 19 enters the tube at the other end of the first connecting support rod 15, it pushes the second treads to squeeze and contract. The sliding block allows the second treads 20 to maintain a certain gap between them, allowing liquid to flow down and preventing accumulated water from causing slips on crew members. When one end of the second connecting support rod 19 is pulled out of the tube at the other end of the first connecting support rod 15, the first connecting support rod 15 uses a second chain to pull the second treads 20 apart one by one, thereby extending the extended distance of the multiple second treads 20.

[0039] One end of the second handrail support rod 21 is fixedly mounted on the second connecting support rod 19, and the third handrail is horizontally fixedly mounted on the other end of the second handrail support rod 21, and one end of the third handrail is inserted into the tube at the other end of the first handrail. A fourth handrail 23 is connected to the breakpoint on the other end of the third handrail, and one end of the fourth handrail 23 is hinged to the third handrail. When the crew needs to enter the second middle extension connector from the anchor winch platform 26, they open the fourth handrail 23 and pass through the third handrail 22. After entering the second stepping plate 20, they can close the fourth handrail 23.

[0040] While embodiments of the application have been disclosed in connection with the above specification and drawings this description is not intended to limit the scope of the application and many modifications, enhancements, alternatives, and variations will become apparent to those skilled in the art from this disclosure. Accordingly, it is intended that the application not be limited to the described embodiments, but that it include all variations falling within the scope of the claims, and their equivalents.

Claims

1. A convertible trestle used for a fully revolving tugboat, characterized in that: include: A forecastle connecting member is provided on the forecastle deck and includes a forecastle deformable support member, a deformable power member, and an auxiliary support member. The forecastle deformable support member, the deformable power member, and the auxiliary support member are all provided on the forecastle deck, and the deformable power member drives the forecastle deformable support member to deform and support. a bridge connector, which is provided on the side of the bridge deck and has the same structure as the forecastle connector, and the bridge connector is symmetrical to the forecastle connector; a middle extension connector, which is provided on the forecastle connector and the bridge connector, and includes a first middle extension connector and a second middle extension connector, wherein the first middle extension connector is provided on the forecastle connector, the second middle extension connector is provided on the bridge connector, and the first middle extension connector and the second middle extension connector are connected to each other; The forefloor deformation support member includes a left forefloor support member, a right forefloor support member and a pedal, the left forefloor support member and the right forefloor support member are both arranged on the forefloor deck, and the pedal is arranged on the left forefloor support member and the right forefloor support member; the left forefloor support member includes a forefloor support deformation member and a forefloor protective member, the forefloor support deformation member is arranged on the forefloor deck, and the forefloor protective member is arranged on the forefloor support deformation member; the forefloor support deformation member includes a fixed support frame, an upper support rod, a lower support rod and a movable support frame, the fixed support frame is in the shape of a right-angle block, and the fixed support frame is fixedly arranged on the side of the forefloor deck at a right angle, and one end of the upper support rod is connected to the other right-angled side of the fixed support frame by a connecting shaft, and the lower support One end of the support rod is hinged on a right-angled side of the fixed support frame; the movable support frame is in the shape of a right-angled block, and the right-angled side of the movable support frame is hinged on the lower support rod, and the other right-angled side of the movable support frame is hinged on the upper support rod, and multiple movable support frames are evenly spaced along the axial direction of the upper support rod; the first middle extension connecting member includes a first connecting support rod, a first pedal, a first handrail support rod and a first handhold rod, one end of the first connecting support rod is hinged on the other end of the upper support rod, and one end of the other first connecting support rod is hinged on the other end of the upper support rod of the right first floor support member; the two ends of the first pedal are respectively arranged on the two first connecting support rods, and multiple first pedals are evenly spaced along the axial direction of the first connecting support rod. The cam is connected to the second support rod by the second step, and the cam is connected to the first support rod by the second step. On the right front building support of the bridge building connector; sliding blocks are respectively provided on both ends of the second pedal board, and the second pedal board is embedded in the sliding grooves of the two second connecting support rods one by one through the sliding blocks at both ends; multiple second pedals are evenly distributed on the second connecting support rod, and adjacent second pedals are connected by a first chain, while the second pedal board at one end is connected to the first connecting support rod through a second chain, and the second pedal board at the other end is connected to the bridge building connector through a third chain; one end of the second handrail support rod is arranged on the second connecting support rod, and the third handrail support rod is arranged on the other end of the second handrail support rod, and one end of the third handrail support rod is inserted into the tube at the other end of the first handrail support rod.

2. The convertible trestle used for a fully revolving tugboat according to claim 1, characterized in that: The fore-floor protection element comprises a transmission rod and a transmission handrail. One end of the transmission rod is hinged to the upper support rod and the lower support rod respectively, and the transmission handrail is hinged to the other end of the transmission rod.

3. The convertible trestle used for a fully revolving tugboat according to claim 1, characterized in that: The right forecastle support member has the same structure as the left forecastle support member, the right forecastle support member is arranged on the forecastle deck, and the right forecastle support member is parallel and symmetrically distributed with the left forecastle support member; the multiple pedals are correspondingly arranged on the fixed support frame and the fixed support frame of the right forecastle support member, and are correspondingly arranged on the movable support frame and the movable support frame of the right forecastle support member.

4. The convertible trestle used for a fully revolving tugboat according to claim 2, characterized in that: The deformable power component includes a power motor, a worm, a first transmission shaft and a worm wheel. The power motor is arranged on the side of the forecastle deck. One end of the worm is arranged on the rotating shaft of the power motor, one end of the first transmission shaft is arranged on the connecting shaft, and the other end of the first transmission shaft is arranged on the connecting shaft of the right forecastle support component. The worm wheel is fixedly mounted on the first transmission shaft, and the worm wheel is engaged with the worm.

5. The convertible trestle used for a fully revolving tugboat according to claim 2, characterized in that: The auxiliary support member includes a second transmission shaft and an automatic telescopic rod. One end of the second transmission shaft is arranged on the lower support rod, and the other end of the second transmission shaft is arranged on the lower support rod of the right foreground support member. The bottom end of the automatic telescopic rod is hinged to the side of the foreground deck, and the top end of the automatic telescopic rod is arranged on the second transmission shaft.

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