CN116424492A

CN116424492A - Ship carrying boat retraction device

Info

Publication number: CN116424492A
Application number: CN202310583942.6A
Authority: CN
Inventors: 罗东宏; 钱雯; 何伟群; 王建彪; 方先进; 陈顺洪
Original assignee: Guangzhou Ship And Ocean Engineering Design And Research Institute 65th Research Institute Of China State Shipbuilding Corp Corp
Current assignee: Guangzhou Ship And Ocean Engineering Design And Research Institute 65th Research Institute Of China State Shipbuilding Corp Corp
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-07-14

Abstract

The invention relates to the technical field of ship carrying boat retraction and extension, and discloses a ship carrying boat retraction device which comprises a hull stern, a traction mechanism, a stern door, a first track, a ship carrying frame and a capturing mechanism; the stern of the ship body is provided with a downward-inclined dock groove; the traction mechanism is arranged in the dock slot; one end of the stern door is movably connected with the lower end of the dock slot; the first track is connected in the dock slot, and the traction mechanism is connected with the boat carrier and can drive the boat carrier to move to the inside of the dock slot or above the stern door; the capturing mechanism is connected to the boat carrier and used for fixing the boat on the boat carrier; the ship carrying boat folding and unfolding device provided by the invention can fold and unfold the boats safely and rapidly.

Description

Ship carrying boat retraction device

Technical Field

The invention relates to the technical field of ship carrying boat retraction, in particular to a ship carrying boat retraction device.

Background

The ship carrying boat retraction device is a process of releasing the boat to the water surface and recovering the boat to the mother ship. The retraction forms mainly comprise a main hanging retraction form and a flushing slide way retraction form at present; the main problem of the suspended type retractable form is that the applicable sea condition is low, the stability of the boat in the suspended type retractable form is poor in the retractable process, larger shaking movement exists, and larger potential safety hazard exists; the main problem of the flushing slide way type retraction form is that the applicable sea condition is lower, and the small boat is easy to cause damage to the boat body of the small boat because the small boat is driven to flush the upper slide way at a higher speed.

Disclosure of Invention

The invention aims to provide a ship carrying boat retraction device which can safely and quickly retract and retract a boat.

In order to achieve the above purpose, the invention provides a ship carrying boat retraction device, which comprises a stern of a ship body, a traction mechanism, a stern door, a first track, a boat carrier and a capturing mechanism; the stern of the ship body is provided with a downward-inclined dock groove; the traction mechanism is arranged in the dock slot; one end of the stern door is movably connected with the lower end of the dock slot; the first track is connected in the dock slot, and the traction mechanism is connected with the boat carrier and can drive the boat carrier to move to the inside of the dock slot or above the stern door; the catching mechanism is connected to the boat carrier and is used for fixing the boat on the boat carrier.

The traction mechanism comprises a winch and a traction rope, the winch is installed in the dock slot, one end of the traction rope is connected to the winch, and the other end of the traction rope is connected to the boat carrier.

More preferably, the traction mechanism further comprises a guide roller, wherein the guide roller is installed in the dock slot and positioned between the winch and the stern door, and the haulage rope is reconnected to the boat carrier through the guide roller.

Preferably, the boat carrying frame comprises a frame body and a supporting frame body, wherein the frame body is provided with a containing space, the capturing mechanism is connected with one end, close to the traction mechanism, of the frame body and is located in the containing space, the supporting frame body is connected with the frame body and is located in the containing space, and the supporting frame body is located on one side, deviating from the traction mechanism, of the capturing mechanism.

More preferably, the frame body comprises a first frame, a second frame, an end frame and a first bearing piece, the first frame and the second frame are oppositely arranged, one end of the end frame is connected with one end of the first frame, which is close to the traction mechanism, the other end of the end frame is connected with one end of the second frame, which is close to the traction mechanism, one end of the first bearing piece is connected with one end of the first frame, which is far away from the traction mechanism, the other end of the first bearing piece is connected with one end of the second frame, which is far away from the traction mechanism, and the first frame, the second frame, the end frame and the first bearing piece enclose into the accommodating space.

More preferably, the boat carrier further comprises a second bearing member, and the second bearing member is arranged in the accommodating space and located between the support frame body and the first bearing member.

More preferably, the number of the second bearing pieces is multiple, and the multiple second bearing pieces are sequentially arranged along the extending direction of the first frame.

More preferably, the boat carrier further comprises a buffer pad connected to the top of the first carrier and/or the top of the second carrier.

More preferably, the boat carrier further comprises an auxiliary roller, wherein the auxiliary roller is connected to the top of the support frame and located between the second bearing piece and the first positioning component, and when the bottom of the boat is abutted to the auxiliary roller and the boat moves along the extending direction of the first frame, the auxiliary roller can rotate along with the boat.

More preferably, the boat carrier further comprises a first limiting assembly, and the first limiting assembly is connected to the first bearing piece. The first limiting assembly comprises two first limiting rollers which are oppositely arranged; when the boat is supported on the frame body, the two first limiting rollers are respectively positioned on two sides of the boat.

More preferably, the boat carrier further comprises a second limiting assembly, and the second limiting assembly is connected to the support frame; the second limiting assembly comprises two second limiting rollers which are oppositely arranged; when the boat is supported on the frame body, the two second limiting rollers are respectively positioned on two sides of the boat.

More preferably, the boat carrier further comprises a first positioning assembly, wherein the first positioning assembly comprises a first connecting rod, a first telescopic spring and a first positioning roller; the first connecting rod is connected to the top of the supporting frame body and extends upwards, the first telescopic spring is connected to the upper end of the first connecting rod, and the first positioning roller is connected to the upper end of the first telescopic spring; the number of the first positioning assemblies is two, and the two first positioning assemblies are oppositely arranged on the support frame body; when the capturing mechanism fixes the boat on the boat carrier, the two first positioning components are respectively positioned on two sides of the boat.

More preferably, when the capturing mechanism fixes the boat on the boat carrier, the center of gravity of the boat carrier is located in the accommodating space.

Preferably, the stern door further comprises a second positioning assembly mounted on the stern door, wherein the second positioning assembly comprises a second connecting rod, a second telescopic spring and a second positioning roller; the second connecting rod is connected to the top of the stern door and extends upwards, the second telescopic spring is connected to the upper end of the second connecting rod, and the second positioning roller is connected to the upper end of the second telescopic spring; the number of the second positioning assemblies is two, and the two second positioning assemblies are oppositely arranged on the stern door; when the capturing mechanism fixes the boat on the boat carrier, the two second positioning assemblies are respectively positioned on two sides of the boat.

Preferably, the stern door further comprises a second rail connected to the top of the stern door and located at the lower end of the first rail; wheels are mounted on the boat carrier, and the boat carrier can move to the inside of the dock slot along the second track and the first track or move to the upper side of the stern door along the first track and the second track through the wheels.

Preferably, the ship further comprises two guard rails mounted on the stern of the ship body, and the two guard rails are respectively located on two sides of the dock slot.

Preferably, the stern door comprises a driving piece connected to the stern of the hull, and the driving piece is connected with the stern door and can drive the stern door to turn upwards around a first axis.

Compared with the prior art, the ship carrying boat retraction device has the beneficial effects that: the boat carrier is driven to move from the dock slot to the position above the stern door along the first track through the traction mechanism so as to be placed into water, the boat carrier is released through the capturing mechanism, the boat can leave the boat carrier so as to finish release of the boat by a mother boat, the boat is fixed on the boat carrier through the capturing mechanism after being opened to the water surface above the boat carrier, the boat carrier is driven to move from the position above the stern door to the dock slot along the first track through the traction mechanism, and the boat can enter the dock slot along with the boat carrier so as to finish recovery of the boat by the mother boat; therefore, the boat carrier can play a transferring function in the releasing and recovering process of the mother boat to the boats, so that the boats are prevented from shaking in the collecting and releasing process, and the safety is high; therefore, the ship carrying boat folding and unfolding device provided by the invention can fold and unfold the boats safely and rapidly.

Drawings

Fig. 1 is a structural view of a ship carrying boat retraction device provided by an embodiment of the present invention;

fig. 2 is a front view of a ship carrying boat retraction device according to an embodiment of the present invention;

fig. 3 is a top view of a ship carrying boat retraction device according to an embodiment of the present invention;

FIG. 4 is a block diagram of a stern door provided by an embodiment of the present invention;

fig. 5 is a block diagram of the boat carrier provided by the embodiment of the invention.

In the figure, 1, the stern of a ship body; 11. a docking slot; 12. a first track; 13. a balance wheel guide rail;

2. a traction mechanism; 21. a winch; 22. a traction rope; 23. a guide roller;

3. a stern door; 31. a second positioning assembly; 32. a second track; 311. a second connecting rod; 312. a second extension spring; 313. a second positioning roller;

4. boat carrying frame; 40. an accommodating space; 41. a frame; 42. a support frame body; 43. a positioning assembly; 44. a second carrier; 45. a limit component; 46. buffering cushion blocks; 47. an auxiliary roller; 48. balance wheel; 411. a first frame; 412. a second frame; 413. an end frame; 414. a first carrier; 431. a first connecting rod; 432. a first extension spring; 433. a first positioning roller;

5. a catching mechanism;

6. a boat;

7. a wheel;

8. a protective rail;

9. a driving member; 91. a driving oil cylinder; 92. and an oil cylinder seat.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom".

The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description and to simplify the description, and does not indicate or imply that the device or element in question must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1-3, a ship carrying boat retraction device according to an embodiment of the present invention preferably includes a stern 1 of a ship body, a traction mechanism 2, a stern door 3, a boat carrier 4, a first rail 12, and a capturing mechanism 5; the stern part 1 of the ship body is provided with a docking slot 11 which is inclined downwards; traction mechanism 2 is mounted in docking slot 11; one end of the stern door 3 is movably connected with the lower end of the docking slot 11; the traction mechanism 2 is connected with the boat carrier 4 and can drive the boat carrier 4 to move along the first track 12 to the inside of the dock tank 11 or above the stern door 3; the catch means 5 are connected to the boat carrier 4 and serve to fix the boat 6 to the boat carrier 4.

Based on the technical scheme, the boat carrier 4 is driven to move from the inside of the docking slot 11 to the position above the stern door 3 through the traction mechanism 2 so as to put the boat carrier 4 into water, the boat 6 is released through the capturing mechanism 5, the boat 6 can leave the boat carrier 4 so as to finish the release of the boat 6, the boat 6 is fixed on the boat carrier 4 through opening the boat 6 on the water surface above the boat carrier 4, the boat carrier 4 is driven to move from the position above the stern door 3 to the inside of the docking slot 11 through the traction mechanism 2, and the boat 6 can enter the docking slot 11 along with the boat carrier so as to finish the recovery of the boat 6; therefore, the boat carrier 4 can play a transferring function in the process of releasing and recovering the boats by the mother boat, so that the boats 6 are prevented from shaking in the process of winding and unwinding, and the safety is high; therefore, the ship carrying boat folding and unfolding device provided by the invention can fold and unfold the boats safely and rapidly.

It will be appreciated that the boat carrier 4 above the stern door 3 is submerged in the sea when the boat loading and unloading apparatus is at sea.

The catching mechanism 5 may be a hook catching device or a catching rod catching device, which is not limited herein.

Referring to fig. 1-3, the ship carrying boat retraction device provided by the invention further comprises two guard rails 8 mounted on the stern 1 of the ship body, wherein the two guard rails 8 are respectively positioned at two sides of the docking slot 11.

Referring to fig. 1-3, the ship carrying boat retraction device provided by the invention further comprises a driving piece 9 connected to the stern 1 of the ship body, wherein the driving piece 9 is connected with the stern door 3 and can drive the stern door 3 to turn upwards around a first axis.

The driving piece 9 comprises a driving oil cylinder 91 and an oil cylinder seat 92, the oil cylinder seat 92 is connected to the stern door 3, the driving oil cylinder 91 is obliquely arranged, the upper end of the driving oil cylinder 91 is movably connected with the stern part 1 of the ship body, and the lower end of the driving oil cylinder 91 is movably connected with the oil cylinder seat 92.

The first axis is the central axis where the stern door 3 and the dock tank 11 are connected.

Specifically, the stern door 3 is movably connected with the docking slot 11 through a first rotating shaft, and the first axis is the central axis of the first rotating shaft.

Referring to fig. 2-3, an embodiment of the present invention provides a traction mechanism 2 including a winch 21 and a traction rope 22, wherein the winch 21 is installed in a docking slot 11, one end of the traction rope 22 is connected to the winch 21, and the other end is connected to a boat carrier 4.

The towing mechanism 2 further comprises guide rollers 23, which guide rollers 23 are mounted in the docking tank 11 between the winch 21 and the stern door 3, and the towing rope 22 is re-connected to the boat carrier 4 via the guide rollers 23.

Referring to fig. 2, 3 and 4, the ship carrying boat retraction device provided by the embodiment of the invention further includes a second rail 32, wherein the second rail 32 is connected to the top of the stern door 3 and is located at the lower end of the first rail 12; wheels 7 are mounted on the boat carrier 4, and the boat carrier 4 can be moved along the second rail 32 and the first rail 12 to the inside of the docking slot 11 or along the first rail 12 and the second rail 32 to the above of the stern door 3 by the wheels 7. The second rail 32 can extend the traveling rail of the boat carrier 4 so that the boat carrier 4 can smoothly move from the inside of the docking slot 11 to the upper side of the stern door 3 to enter the water.

Two balance wheel guide rails 13 are also arranged in the docking slot 11, and the two balance wheel guide rails 13 are oppositely arranged at two sides in the docking slot 11; balance wheels 48 which are respectively matched with the two balance wheel guide rails 13 are respectively connected with two sides of the boat carrier 4. The use of the balance wheel guide 13 and the balance wheel 48 can improve the stability of the movement of the boat carrier 4 along the first rail 12.

The first rail 12 is located between two balance wheel rails 13.

The balance wheel 48 and the balance wheel guide rail 13 are respectively matched, which means that the balance wheel 48 can move along the balance wheel guide rail 13.

Referring to fig. 4, the ship carrying boat retraction device provided by the embodiment of the present invention further includes a second positioning assembly 31 installed on the stern door 3, wherein the second positioning assembly 31 includes a second connecting rod 311, a second extension spring 312 and a second positioning roller 313; the second connecting rod 311 is connected to the top of the stern door 3 and extends upwards, the second telescopic spring 312 is connected to the upper end of the second connecting rod 311, and the second positioning roller 313 is connected to the upper end of the second telescopic spring 312; the number of the second positioning components 31 is two, and the two second positioning components 31 are oppositely arranged on the stern door 3; wherein, when the capturing mechanism 5 fixes the boat 6 on the boat carrier 4, the two second positioning assemblies 31 are respectively positioned at two sides of the boat 6. The second positioning component 31 can be used for guiding and positioning the boat 6; the use of the second positioning assembly 31 including the second connecting rod 311, the second extension spring 312, and the second positioning roller 313 can reduce damage between the second positioning assembly 31 and the boat 6 due to collision.

Referring to fig. 5, the boat carrier 4 provided in the embodiment of the invention includes a frame 41 and a supporting frame 42, the frame 41 has a receiving space 40, the capturing mechanism 5 is connected with one end of the frame 41 close to the traction mechanism 2 and is located in the receiving space 40, the supporting frame 42 is connected with the frame 41 and is located in the receiving space 40, and the supporting frame 42 is located at one side of the capturing mechanism 5 away from the traction mechanism 2.

The frame 41 includes a first frame 411, a second frame 412, an end frame 413 and a first bearing member 414, where the first frame 411 and the second frame 412 are oppositely arranged, one end of the end frame 413 is connected to one end of the first frame 411 close to the traction mechanism 2, the other end is connected to one end of the second frame 412 close to the traction mechanism 2, one end of the first bearing member 414 is connected to one end of the first frame 411 far away from the traction mechanism 2, the other end is connected to one end of the second frame 412 far away from the traction mechanism 2, and the first frame 411, the second frame 412, the end frame 413 and the first bearing member 414 enclose a containing space 40.

The support frame body 42 is located between the first carrier 414 and the catch mechanism 5.

In this embodiment, the catch mechanism 5 is attached to the end bell 413.

In other embodiments, the capturing mechanism 5 may be further connected to an end of the first frame 411 near the traction mechanism 2 or an end of the second frame 412 near the traction mechanism 2, which is not limited herein.

The first carrier 414 is provided in a curved shape with a low middle and high sides, which is adapted to the bottom shape of the boat 6.

When the capturing mechanism 5 secures the boat 6 to the boat carrier 4, the center of gravity of the boat carrier 4 is located in the accommodation space 40. The mode that the gravity center of the boat carrier 4 is located in the accommodating space 40 is adopted, so that the boat carrier 4 can well bear the boats 6, scraping of the boats 6 when moving between the dock tank 11 and the stern door 3 through the boat carrier 4 and the bottom wall of the dock tank 11 can be avoided, and damage to the boats 6 is avoided.

The boat carrier 4 further includes a second carrier 44, where the second carrier 44 is disposed in the accommodating space 40 and between the supporting frame 42 and the first carrier 414, and two ends of the second carrier 44 are respectively connected to the first frame 411 and the second frame 412. The use of the second carrier 44 can increase the carrying capacity of the boat carrier 4 so that the boat carrier 4 can better carry the boat 6.

The second carrier 44 is provided in a curved shape with a low middle and high sides, which is adapted to the shape of the bottom of the boat 6.

The boat carrier 4 further comprises a cushion block 46, the cushion block 46 being connected to the top of the first carrier 414 and/or to the top of the second carrier 44. The use of the cushion 46 can provide a cushioning effect between the bottom of the boat 6 and the top of the boat carrier 4 to avoid damage to the boat 6 by the boat carrier 4.

In this embodiment, a cushion 46 is connected to the top of the first carrier 414 and the top of the second carrier 44.

In other embodiments, a cushion 46 is attached to either the top of the first carrier 414 or the top of the second carrier 44.

The number of the second carriers 44 is plural, and the plural second carriers 44 are sequentially disposed along the extending direction of the first frame 411.

The boat carrier 4 further comprises a first positioning assembly 43, wherein the first positioning assembly 43 comprises a first connecting rod 431, a first telescopic spring 432 and a first positioning roller 433; the first connecting rod 431 is connected to the top of the supporting frame body 42 and extends upwards, the first telescopic spring 432 is connected to the upper end of the first connecting rod 431, and the first positioning roller 433 is connected to the upper end of the first telescopic spring 432; the number of the first positioning components 43 is two, and the two first positioning components 43 are oppositely arranged on the support frame body 42; wherein, when the capturing mechanism 5 fixes the boat 6 on the boat carrier 4, the two first positioning assemblies 43 are respectively positioned at two sides of the boat 6. The first positioning assemblies 43 are employed so that a boat operator on the sea surface or a pilot on the vessel knows the position of the boat carrier 4, thereby facilitating the boat operator to accurately drive the boat 6 from the boat 6 onto the water surface on the boat carrier 4, while the two first positioning assemblies 43 are employed so that the pilot boat operator knows that the boat 6 should be placed between the two first positioning assemblies 43 so that the boat operator can accurately park the boat 6 between the two first positioning assemblies 43, i.e., the first positioning assemblies 43 can perform guiding and positioning functions for the parking of the boat 6 on the boat carrier 4. The first positioning component 43 comprising the first connecting rod 431, the first telescopic spring 432 and the first positioning roller 433 is adopted, so that the elasticity of the first telescopic spring 432 can be utilized to play a role in buffering, and the circular arrangement of the first positioning roller 433 is utilized to avoid acute angle collision, so that the damage caused by mutual collision between the small boat 6 and the first positioning component 43 can be reduced.

The boat carrier 4 further comprises an auxiliary roller 47, wherein the auxiliary roller 47 is connected to the top of the support frame 42 and located between the second bearing member 44 and the first positioning member 43, and when the bottom of the boat 6 abuts against the auxiliary roller 47 and the boat 6 moves along the extending direction of the first frame 411, the auxiliary roller 47 can rotate along with the movement of the boat 6. The release auxiliary roller 47 is adopted to convert part of sliding friction between the boat 6 and the support frame 42 into rolling friction, which is beneficial to smooth separation of the boat 6 and the boat carrier 4.

The boat carrier 4 further comprises a first limiting assembly 45, and the first limiting assembly 45 is connected to the first carrier 414. The first limiting assembly 45 comprises two first limiting rollers which are oppositely arranged; when the small boat 6 is carried on the frame body, the two first limiting rollers are respectively located on two sides of the small boat 6. The use of the first stop assembly 45 can act as a stop for the mooring of the boat 6 on the boat carrier 4.

The boat carrier 4 further comprises a second limiting assembly 49, and the second limiting assembly 49 is connected to the supporting frame 42. The second limiting assembly 49 comprises two second limiting rollers arranged oppositely; wherein, when the boat 6 is carried on the frame body, two second spacing gyro wheels are located the both sides of boat 6 respectively. The use of the second stop assembly 49 can act as a stop for the mooring of the boat 6 on the boat carrier 4.

In summary, the ship carrying boat retraction device provided by the embodiment of the invention has the following beneficial effects:

1. the boat carrier 4 can play a role in transferring when the mother ship releases the boat 6 and the mother ship recovers the boat 6, so that the boat 6 is prevented from shaking in the process of retraction and release, and the safety is high; simultaneously, the boat carrier 4 is adopted to transfer the boats 6, so that the boats 6 do not need to be arranged in the docking groove 11 in a punching way, and damage to the boats 6 due to punching can be avoided.

2. The existing hoisting type folding and unfolding form is poor in stability of the small boat in the folding and unfolding process, has large shaking motion and large potential safety hazard, and can be only suitable for sea conditions below 3 levels; the existing flushing slide way type retraction form is only suitable for sea conditions below level 3 because the small boats need to be flushed and discharged at a higher speed to go up the slide way, so that the small boats are easy to damage and the driving problem is easy to occur; the ship carrying boat collecting and releasing device provided by the invention can play a role in transferring during the process of releasing the boat 6 from the mother ship and recovering the boat 6 from the mother ship through the boat loading frame 4, has higher system safety, and can be suitable for sea conditions of 4 levels and below.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims

1. A ship-mounted boat retraction device, comprising:

the ship body stern is provided with a downward-inclined docking slot;

the traction mechanism is arranged in the dock slot;

one end of the stern door is movably connected with the lower end of the dock slot;

a first rail connected within the dock slot;

the traction mechanism is connected with the boat carrier and can drive the boat carrier to move to the inside of the dock slot or to the upper side of the stern door along the first track;

the capturing mechanism is connected to the boat carrier and used for fixing the boat on the boat carrier.

2. The boat deck retrieving and releasing apparatus as claimed in claim 1, wherein the pulling mechanism includes a winch installed in the docking slot and a pulling rope having one end connected to the winch and the other end connected to the boat carrier.

3. The boat carrier retraction device according to claim 1, wherein the boat carrier comprises a frame body and a supporting frame body, the frame body is provided with a containing space, the capturing mechanism is connected with one end of the frame body, which is close to the traction mechanism, and is located in the containing space, the supporting frame body is connected with the frame body and is located in the containing space, and the supporting frame body is located on one side, which is away from the traction mechanism, of the capturing mechanism.

4. A ship carrying boat retraction device according to claim 3 wherein the frame comprises a first frame, a second frame, an end frame and a first carrier, wherein the first frame and the second frame are arranged in opposition, one end of the end frame is connected to one end of the first frame adjacent to the traction mechanism, the other end is connected to one end of the second frame adjacent to the traction mechanism, one end of the first carrier is connected to one end of the first frame away from the traction mechanism, the other end is connected to one end of the second frame away from the traction mechanism, and the first frame, the second frame, the end frame and the first carrier enclose the accommodation space.

5. A boat deck as recited in claim 3, wherein the boat deck further comprises a first positioning assembly comprising a first connecting rod, a first extension spring, and a first positioning roller; the first connecting rod is connected to the top of the supporting frame body and extends upwards, the first telescopic spring is connected to the upper end of the first connecting rod, and the first positioning roller is connected to the upper end of the first telescopic spring;

the number of the first positioning assemblies is two, and the two first positioning assemblies are oppositely arranged on the support frame body;

when the capturing mechanism fixes the boat on the boat carrier, the two first positioning components are respectively positioned on two sides of the boat.

6. The boat deployment apparatus as set forth in any one of claims 3 to 5, wherein a center of gravity of the boat carrier is located in the accommodation space when the capturing mechanism fixes the boat to the boat carrier.

7. The watercraft launch and retrieval apparatus of claim 1 further comprising a second positioning assembly mounted on said stern door, said second positioning assembly including a second connecting rod, a second extension spring and a second positioning roller; the second connecting rod is connected to the top of the stern door and extends upwards, the second telescopic spring is connected to the upper end of the second connecting rod, and the second positioning roller is connected to the upper end of the second telescopic spring;

the number of the second positioning assemblies is two, and the two second positioning assemblies are oppositely arranged on the stern door;

when the capturing mechanism fixes the boat on the boat carrier, the two second positioning assemblies are respectively positioned on two sides of the boat.

8. The boat deck retrieving and releasing apparatus as recited in claim 1, further comprising a second rail connected to a top of said stern door and located at a lower end of said first rail; wheels are mounted on the boat carrier, and the boat carrier can move to the inside of the dock slot along the second track and the first track or move to the upper side of the stern door along the first track and the second track through the wheels.

9. The boat deck retrieving and retrieving device as claimed in claim 1, further comprising two guard rails mounted on the stern of the hull, the two guard rails being located at both sides of the docking slot, respectively.

10. The watercraft launch and retrieval device of claim 1 further comprising a drive member attached to the stern of the hull, said drive member being connected to the stern door and being capable of driving the stern door to flip up about a first axis.