Free falling type boat frame

Abstract

The utility model discloses a free landing type boat frame, which comprises a slideway, a rotating device, a boat hanging device, a maintenance platform and an air cylinder, the slideway is fixedly connected to a mother boat, one end of the maintenance platform is hinged to the slideway through the rotating device, one end of the air cylinder is hinged to the slideway, and the other end of the air cylinder is hinged to the boat hanging device. The other end of the boat hanging device is hinged to the side wall of the side, close to the sliding way, of the maintenance platform, and the boat hanging device is fixedly connected to the end, away from the rotating device, of the maintenance platform.

Description

Technical Field

[0001] The utility model relates to the technical field of marine equipment, in particular to a free-fall davit. Background Art

[0002] A davit is a special device on a ship for hoisting and lowering a lifeboat or a workboat. It is generally located at the stern of the ship. Usually, it is inside the ship's side. When in use, it extends outside the side. It hoists or lowers the boat. According to the operation mode of receiving and releasing the boat, it is divided into three types: swing-out type, swing-down type and gravity type. With the requirements of the SOLAS code, it is further divided into five types: throw-down type, gravity davit with folding boom, four-link type, platform type, single boom, etc.;

[0003] During the hoisting and lowering process of the existing davit, the hoisting and lowering of the lifeboat or workboat are basically completed by a boat hoisting device (such as a winch). This method has the problem of a large swing amplitude during the hoisting process due to a single force application;

[0004] In view of this, there is an urgent need for a free-fall davit to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a free-fall davit to solve the above problems.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a free-fall davit, comprising:

[0007] A slideway, a rotating device, a boat hoisting device, a maintenance platform and a cylinder. The slideway is fixedly connected to the mother ship. One end of the maintenance platform is hinged to the slideway through the rotating device. One end of the cylinder is hinged to the slideway, and the other end is hinged to the side wall of the maintenance platform close to the slideway. The boat hoisting device is fixedly connected to the end of the maintenance platform far from the rotating device.

[0008] Preferably, a middle cross bar fixedly connected to it is provided at the middle position of the side wall of the slideway far from the maintenance platform. And a small pulley of the boat fixing device movably connected to it is provided at the end of the middle cross bar far from the slideway. And a release device and a small steel wire rope of the boat fixing device matched with the small pulley of the boat fixing device are provided on the mother ship.

[0009] Preferably, a support arm is provided at the end of the slideway far from the rotating device.

[0010] Preferably, a sliding cavity and a plurality of placing grooves are provided on the slideway. A plurality of communication cavities connecting the sliding cavity are provided at the bottoms of the plurality of placing grooves. And a boat hoisting auxiliary component matched with it is provided on the vertical arm.

[0011] Preferably, the lifeboat auxiliary assembly includes a plurality of auxiliary plates, a plurality of connecting pipes, a sliding plate, and an adjusting cylinder. The sliding plate is provided with a plurality of ramp notches whose positions match the placement grooves. One end of the auxiliary plate is hinged to the side wall of the placement groove. One end of the connecting pipe contacts the auxiliary plate, and the other end passes through the communication cavity and is located at the ramp notch. The adjusting cylinder is fixedly connected to the end of the slideway away from the rotating device, and the piston rod of the adjusting cylinder passes through the wall of the sliding cavity and is fixedly connected to the sliding plate, and the moving direction of the piston rod of the adjusting cylinder is the same as the sliding direction of the sliding plate.

[0012] Preferably, an inner pipe sleeved on the inner side is provided at one end of the connecting pipe in contact with the auxiliary plate. A spring is provided at the bottom of the inner pipe, and both ends of the spring are fixedly connected to the inner pipe and the connecting pipe respectively.

[0013] Preferably, an installation groove is provided on the slideway, and an auxiliary sliding assembly matching the installation groove is provided in the installation groove.

[0014] Preferably, the auxiliary sliding assembly includes a driving wheel, a plurality of driven wheels, and an auxiliary toothed belt. The driving wheel and the driven wheels are sequentially connected by bearings to the wall of the installation groove. The auxiliary toothed belt is wound around the driving wheel and the driven wheels, and the auxiliary toothed belt is meshed and connected with the driving wheel, and a reversible motor matching the driving wheel is provided on the driving wheel.

[0015] Preferably, a plurality of protrusions fixedly connected to the auxiliary toothed belt are provided on the side of the auxiliary toothed belt away from the driving wheel.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] The auxiliary hoisting of the lifeboat device is completed by the small pulley of the lifeboat fixing device and the small steel wire rope of the lifeboat fixing device. At the same time, the force of the boat on the slideway is changed by the lifeboat auxiliary assembly provided on the slideway, so as to achieve the purpose of auxiliary hoisting. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall sectional structure of a free-fall lifeboat davit;

[0019] Figure 2 It is a schematic diagram of the sectional structure of the lifeboat auxiliary assembly in the second embodiment of the present utility model;

[0020] Figure 3 It is a schematic diagram of the sectional structure of the inner pipe in the second embodiment of the present utility model;

[0021] Figure 4 It is a schematic diagram of the sectional structure of the auxiliary sliding assembly in the third embodiment of the present utility model.

[0022] In the figure: 1, slideway; 10, middle crossbar; 11, small pulley of boat-fixing device; 12, release device; 13, small steel wire rope of boat-fixing device; 14, support arm; 2, rotating device; 20, air cylinder; 3, boat hoisting device; 4, maintenance platform; 410, sliding cavity; 411, placing groove; 412, communicating cavity; 413, installation groove; 5, boat hoisting auxiliary assembly; 50, auxiliary plate; 51, connecting pipe; 510, inner pipe; 511, spring; 52, sliding plate; 520, ramp notch; 53, adjusting air cylinder; 6, auxiliary sliding assembly; 60, driving wheel; 61, driven wheel; 62, auxiliary toothed belt; 620, protrusion. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment 1

[0025] Please refer to the attached Figure 1 , a free-fall lifeboat davit, comprising:

[0026] A slideway 1, a rotating device 2, a boat hoisting device 3, a maintenance platform 4 and an air cylinder 20. The slideway 1 is fixedly connected to the mother ship. One end of the maintenance platform 4 is hinged to the slideway 1 through the rotating device 2. One end of the air cylinder 20 is hinged to the slideway 1, and the other end is hinged to the side wall of the maintenance platform 4 close to the slideway 1. The boat hoisting device 3 is fixedly connected to the end of the maintenance platform 4 away from the rotating device 2;

[0027] One end of the maintenance platform 4 is connected to one end of the slideway 1 through the rotating device 2, so as to realize the rotation of the maintenance platform 4 with the rotating device 2 as the rotation axis center. During the rotation, the boat hoisting device 3 on the maintenance platform 4 hoists the lifeboat or workboat through a steel wire rope, and the setting of the air cylinder 20 can ensure the stable state of the maintenance platform 4 during the hoisting process.

[0028] Specifically, a middle crossbar fixedly connected to it is provided at the middle position of the side wall of the slideway away from the maintenance platform. A small pulley of the lifeboat fixing device is movably connected to one end of the middle crossbar away from the slideway. A release device and a small steel wire rope of the lifeboat fixing device are provided on the mother ship and cooperate with the small pulley of the lifeboat fixing device. When hoisting the lifeboat by the lifeboat hoisting device 3, the force direction of the lifeboat is single, so there will be a certain degree of swing, and it is easy to collide and rub between the lifeboat and the mother ship. The setting of the middle crossbar 10 can not only support the slideway 1 to make the slideway 1 have a certain inclination, but also, through the cooperation of the small pulley 11 of the fixing device, the release device 12 and the small steel wire rope 13 of the lifeboat fixing device installed at one end of the middle crossbar 10, an external force different from the hoisting direction can be applied to the lifeboat during the hoisting process, thereby ensuring the stability of the lifeboat during the hoisting process. It should be noted that according to the different directions of the small steel wire rope 13 of the lifeboat fixing device, the number and installation positions of the small pulleys 11 of the fixing device are also different.

[0029] Specifically, a support arm 14 is provided at one end of the slideway 1 away from the rotating device 2. The support arm 14 can fix the position of the lifeboat hoisting device 3 when the lifeboat hoisting device 3 is in an idle state.

[0030] Embodiment 2

[0031] Please refer to the appendix Figures 2 - 3

[0032] Specifically, a sliding cavity 410 and a plurality of placement grooves 411 are provided on the slideway 1. A plurality of communication cavities 412 connecting the sliding cavity 410 are provided at the bottoms of the plurality of placement grooves 411. And a lifeboat hoisting auxiliary assembly 5 is provided on the vertical arm 41 and is matched with it.

[0033] Specifically, the lifeboat hoisting auxiliary assembly 5 includes a plurality of auxiliary plates 50, a plurality of connecting pipes 51, a sliding plate 52 and an adjusting cylinder 53. A plurality of ramp notches 520 matching the placement grooves 411 are provided on the sliding plate 52. One end of the auxiliary plate 50 is hinged to the side wall of the placement groove 411. One end of the connecting pipe 51 contacts the auxiliary plate 50, and the other end passes through the communication cavity 412 and is located at the ramp notch 520. The adjusting cylinder 53 is fixedly connected to one end of the slideway 41 away from the rotating device 2. And the piston rod of the adjusting cylinder 53 passes through the wall of the sliding cavity 410 and is fixedly connected to the sliding plate 52. And the moving direction of the piston rod of the adjusting cylinder 53 is the same as the sliding direction of the sliding plate 52.

[0034] Considering that during the hoisting process of the lifeboat, due to the certain inclination of the slideway 1, it may increase the load on the rotating device 2 to a certain extent. For example, when the lifeboat is placed from the mother ship into still water, during the process of the lifeboat sliding along the slideway 1, its own gravity will cause the sliding speed of the lifeboat on the slideway 1 to increase. In order to avoid the lifeboat sliding too fast, it is necessary to offset a part of the acceleration generated by the lifeboat's own gravity on the slideway 1 through the rotating device 2 or the lifeboat hoisting device 3, indirectly increasing the load on the rotating device 2 or the lifeboat hoisting device 3. Therefore, a plurality of cavities are arranged on the slideway 1 and the lifeboat hoisting auxiliary assembly 5 is installed therein. By controlling the telescopic amount of the piston rod of the adjusting cylinder 53, the position of the sliding plate 52 is controlled, and then the contact point between the connecting pipe 51 and the inclined plane of the slope notch 520 is changed, and the actual application height of the connecting pipe 51 located in the placing groove 411 is changed, thereby adjusting the inclination of the auxiliary plate 50, and reducing the sliding speed of the lifeboat by the contact with the auxiliary plate 50 when the lifeboat slides on the slideway 1, and reducing the load on the rotating device 2 and the lifeboat hoisting device 3 in a variable direction.

[0035] Specifically, an inner pipe 510 sleeved on the inner side is provided at one end of the connecting pipe 51 in contact with the auxiliary plate 50. A spring 511 is provided at the bottom of the inner pipe 510, and both ends of the spring 511 are fixedly connected to the inner pipe 510 and the connecting pipe 51 respectively. In order to avoid the situation that when the auxiliary plate 50 contacts the bottom of the lifeboat during the sliding process of the lifeboat in actual application, the lifeboat scrapes up the auxiliary plate 50, an inner pipe 510 and a spring 511 are arranged at the contact position between the connecting pipe 51 and the auxiliary plate 50, so that the auxiliary plate 50 has a certain buffering capacity. It should be noted that in order to further avoid the occurrence of the above situation, a wear-resistant and deformable plate, such as a thin metal plate, can be laid on the slideway 1.

[0036] Embodiment III

[0037] Please refer to the appendix Figure 4

[0038] Specifically, an installation groove 413 is provided on the slideway 1, and an auxiliary sliding assembly 6 matching with it is arranged in the installation groove 413.

[0039] Specifically, the auxiliary sliding assembly 6 includes a driving wheel 60, a plurality of driven wheels 61 and an auxiliary toothed belt 62. The driving wheel 60 and the driven wheels 61 are sequentially connected to the groove wall of the installation groove 413 by bearings. The auxiliary toothed belt 62 is wound around the driving wheel 60 and the driven wheels 61, and the auxiliary toothed belt 62 is meshed with the driving wheel 60, and a reversible motor matching with the driving wheel 60 is provided.

[0040] Specifically, a plurality of protrusions 620 fixedly connected thereto are provided on one side of the auxiliary toothed belt 62 away from the driving wheel 60;

[0041] Considering that in the second embodiment, the auxiliary davit auxiliary assembly 5 has a relatively large number of cavities opened in the slideway 1. To avoid the depression of the slideway 1 caused by the pressure of the lifeboat, the quality requirements for the slideway 1 are relatively high. Therefore, the auxiliary sliding assembly 6 is used to assist in hoisting the lifeboat. By replacing the slideway 1 wall at the installation groove 413 with the driving wheel 60, the driven wheel and the auxiliary toothed belt 62 provided in the installation groove 413, and driving the rotation of the driving wheel 60 and the auxiliary toothed belt 62 by the reversible motor, the purpose of assisting in hoisting the lifeboat is achieved. For example, when the lifeboat slides towards the still water direction and when disassembling the lifeboat, the movement direction of the auxiliary toothed belt 62 can be adjusted to be opposite to the sliding direction of the lifeboat, indirectly increasing the friction force received by the lifeboat and reducing its sliding speed. On the contrary, when loading the lifeboat, the loading of the lifeboat can be assisted by adjusting the movement direction of the auxiliary toothed belt 62 to be consistent with the sliding direction of the lifeboat. The protrusions 620 provided on the auxiliary toothed belt 62 can further increase the friction force between the auxiliary toothed belt 62 and the lifeboat, enhancing the actual use effect of the auxiliary toothed belt 62.

[0042] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A free-fall lifeboat davit, characterized in that, Comprising: A slideway (1), a rotating device (2), a lifeboat hoisting device (3), a maintenance platform (4) and a cylinder (20), wherein the slideway (1) is fixedly connected to the mother ship, one end of the maintenance platform (4) is hinged to the slideway (1) through the rotating device (2), one end of the cylinder (20) is hinged to the slideway (1), and the other end is hinged to the side wall of the maintenance platform (4) close to the slideway (1). The lifeboat hoisting device (3) is fixedly connected to the end of the maintenance platform (4) away from the rotating device (2).

2. A free-fall lifeboat davit according to claim 1, characterized in that: In the middle position of the side wall of the slideway (1) away from the maintenance platform (4), a middle cross bar (10) fixedly connected thereto is provided, and a small pulley (11) of the lifeboat fixing device movably connected thereto is provided at one end of the middle cross bar (10) away from the slideway (1). A release device (12) and a small steel wire rope (13) of the lifeboat fixing device are provided on the mother ship and are matched with the small pulley (11) of the lifeboat fixing device.

3. A free-fall lifeboat davit according to claim 1, characterized in that: A support arm (14) is provided at one end of the slideway (1) away from the rotating device (2).

4. A free-fall lifeboat davit according to claim 1, characterized in that: A sliding cavity (410) and a plurality of placing grooves (411) are provided on the slideway (1). A plurality of communicating cavities (412) connecting with the sliding cavity (410) are provided at the bottom of the plurality of placing grooves (411), and a lifeboat hoisting auxiliary assembly (5) matched therewith is provided on the vertical arm (41).

5. A free-fall lifeboat davit according to claim 4, characterized in that: The lifeboat hoisting auxiliary assembly (5) includes a plurality of auxiliary plates (50), a plurality of connecting pipes (51), a sliding plate (52) and an adjusting cylinder (53). A plurality of ramp notches (520) matching the placing grooves (411) in position are provided on the sliding plate (52). One end of the auxiliary plate (50) is hinged to the side wall of the placing groove (411). One end of the connecting pipe (51) contacts the auxiliary plate (50), and the other end passes through the communicating cavity (412) and is located at the ramp notch (520). The adjusting cylinder (53) is fixedly connected to one end of the slideway (1) away from the rotating device (2), and the piston rod of the adjusting cylinder (53) passes through the wall of the sliding cavity (410) and is fixedly connected to the sliding plate (52), and the moving direction of the piston rod of the adjusting cylinder (53) is the same as the sliding direction of the sliding plate (52).

6. A free-fall lifeboat davit according to claim 5, characterized in that: An inner pipe (510) sleeved on the inner side thereof is provided at the end of the connecting pipe (51) contacting the auxiliary plate (50). A spring (511) is provided at the bottom of the inner pipe (510), and both ends of the spring (511) are fixedly connected to the inner pipe (510) and the connecting pipe (51) respectively.

7. A free-fall lifeboat davit according to claim 1, characterized in that: The slideway (1) is provided with a mounting groove (413), and an auxiliary sliding assembly (6) matching the mounting groove (413) is arranged in the mounting groove (413).

8. A free-fall type davit according to claim 7, characterized in that: The auxiliary sliding assembly (6) includes a driving wheel (60), a plurality of driven wheels (61) and an auxiliary toothed belt (62). The driving wheel (60) and the driven wheels (61) are sequentially connected to the wall of the mounting groove (413) by bearings. The auxiliary toothed belt (62) is wound around the driving wheel (60) and the driven wheels (61), and the auxiliary toothed belt (62) is meshed and connected with the driving wheel (60), and the driving wheel (60) is provided with a reversible motor matching it.

9. A free-fall type davit according to claim 8, characterized in that: A plurality of protrusions (620) fixedly connected with the auxiliary toothed belt (62) are arranged on one side of the auxiliary toothed belt (62) away from the driving wheel (60).

Images