Revolving crane for lifeboat

Abstract

The utility model relates to a rotary crane for a lifeboat, and aims to solve the problem that the stability of the rotary crane for releasing the lifeboat and the safety of personnel on the lifeboat are reduced due to the phenomenon that a sling is easy to swing due to strong wind on the water surface in the use process of the conventional rotary crane for the lifeboat at present. The utility model relates to a lifeboat slewing crane, in particular to a lifeboat slewing crane which comprises a suspension arm, one end of the suspension arm is movably connected with a folding arm, the bottom end of the folding arm is fixedly connected with a first concave plate, and the other end of the folding arm is movably connected with two guide wheels. The two sides of the other end of the folding arm are fixedly connected with supporting columns, the supporting columns are connected with two connecting columns through two telescopic rods, the phenomenon that the sling swings due to the fact that wind on the water surface is large is avoided, the stability of the rotary crane when the lifeboat is released is improved, and the safety of personnel on the lifeboat is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rotary crane, concretely to a lifeboat rotary crane. BACKGROUND

[0002] Cargo ships and passenger ships must be equipped with rescue boats or life rafts, and rescue boat and life raft cranes, as special cranes installed on the ship and used in cooperation with rescue boats and life rafts, must be able to quickly and conveniently deliver escape personnel to the rescue boats and life rafts and hoist them to be placed on the water surface. Common rescue boat and life raft cranes are fixed-arm type, with rescue boats and life rafts hanging on the crane and located at the ship's side.

[0003] In the process of realizing the utility model, the inventor found that at least the following problems in the prior art have not been solved. In the use process, the traditional lifeboat rotary crane is prone to swinging of the sling due to relatively large wind on the water surface, which reduces the stability of the rotary crane when releasing the lifeboat and the safety of personnel on the lifeboat. Moreover, the lifeboat rotary crane is a whole mechanism, thus occupying a relatively large space on the ship and reducing the flexibility of the rotary crane in the use process. Therefore, it is necessary to design a new technical solution to solve the problem. SUMMARY

[0004] The utility model aims at overcoming the shortcomings of the prior art, adapting to the actual needs, and providing a lifeboat rotary crane to solve the technical problem that the traditional lifeboat rotary crane is prone to swinging of the sling due to relatively large wind on the water surface in the use process, which reduces the stability of the rotary crane when releasing the lifeboat and the safety of personnel on the lifeboat. Moreover, the lifeboat rotary crane is a whole mechanism, thus occupying a relatively large space on the ship.

[0005] To achieve the purpose of the utility model, the utility model adopts the technical scheme of designing a lifeboat rotary crane, which comprises a lifting arm, one end of the lifting arm is movably connected with a folding arm, the bottom end of the folding arm is fixedly connected with a first concave plate, the other end of the folding arm is movably connected with two guide wheels, two support columns are fixedly connected on the two sides of the other end of the folding arm, the two support columns are connected with two connecting columns through two telescopic rods, an installation ring is fixedly connected between the two connecting columns, and the first concave plate is connected with a second concave plate through a hydraulic rod.

[0006] Preferably, one end of each of the two telescopic rods is fixedly connected to the bottom end of each of the two support columns, and the other end of each of the two telescopic rods is fixedly connected to one end of each of the two connecting columns.

[0007] Preferably, one end of the hydraulic rod is movably connected inside the other end of the first N-shaped plate, the other end of the hydraulic rod is movably connected inside one end of the second N-shaped plate, and the other end of the second N-shaped plate is fixedly connected to one side of the rotating seat.

[0008] Preferably, the top end of the rotating seat is movably connected to the other end of the boom, a countersunk bolt is arranged at the center of the rotating seat, the countersunk bolt is connected to the output end of a driving motor through a threaded hole, the driving motor is fixedly connected to the center of the base, a first groove is formed in the periphery of the driving motor, a plurality of balls are movably connected inside the first groove, and a second groove is formed in the bottom of the rotating seat.

[0009] Preferably, 2 / 3 of the balls are located inside the inner wall of the first groove, and 1 / 3 of the balls are located inside the second groove.

[0010] Preferably, the top end of the boom is fixedly connected with a winding roller mechanism, one side of the winding roller mechanism is fixedly connected with a first belt pulley, the first belt pulley is connected with a second belt pulley through a transmission belt, one side of the second belt pulley is fixedly connected to the output end of a winding motor, a sling is wound on the winding roller mechanism, the other end of the sling passes through the middle of the two guide rollers, and is fixedly connected to the top end of the mounting ring, and the other end of the mounting ring is connected with a hook through a cable.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] When the slewing crane hoists the lifeboat, the winding motor drives the second belt pulley to rotate clockwise, so that the second belt pulley drives the first belt pulley to rotate clockwise through the transmission belt, and then the first belt pulley drives the winding roller on the winding roller mechanism to rotate, so that the sling is released, and then the sling drives the guide roller to rotate on the folding arm, so that the mounting ring is lowered, and the lifeboat is put into the water.

[0013] When the rotary crane is folded and stored, the output end of the hydraulic rod is retracted, and in this process, the two ends of the hydraulic rod are rotated on the first and second recessed plates respectively, so that the hydraulic rod drives the folding arm to rotate on the boom, thereby achieving the storage of the rotary crane, reducing the occupation of the rotary crane on the ship space, and improving the flexibility of the rotary crane in use. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the folding arm of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the base of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the rotary seat of the utility model;

[0018] In the figure: 1, boom; 11, folding arm; 12, first recessed plate; 13, guide wheel; 14, support column; 15, telescopic rod; 16, connecting column; 17, mounting ring; 18, hydraulic rod; 19, second recessed plate;

[0019] 2, rotary seat; 21, countersunk bolt; 22, threaded hole; 23, driving motor; 24, first recess; 25, ball; 26, second recess; 27, base;

[0020] 3, winding roller mechanism; 31, first belt pulley; 32, transmission belt; 33, second belt pulley; 34, sling; 35, cable; 36, hook; 37, winding motor. DETAILED DESCRIPTION

[0021] The utility model is further illustrated below in combination with the drawings and examples:

[0022] Example 1: a lifeboat rotary crane, referring to Figures 1 to 4, including the boom 1, one end of the boom 1 is movably connected with the folding arm 11, the bottom end of the folding arm 11 is fixedly connected with the first concave plate 12, the other end of the folding arm 11 is movably connected with two guide wheels 13, both sides of the other end of the folding arm 11 are fixedly connected with the support column 14, the support column 14 is connected with two link columns 16 through two telescopic rods 15, one end of the two telescopic rods 15 is fixedly connected with the bottom end of the two support columns 14, the other end of the two telescopic rods 15 is fixedly connected with one end of the two link columns 16, the two link columns 16 are fixedly connected with the mounting ring 17, when the rotary crane hoists the lifeboat, the winding motor 37 drives the second pulley 33 to rotate clockwise, so that the second pulley 33 drives the first pulley 31 to rotate clockwise through the transmission belt 32, and then the first pulley 31 drives the winding roller on the winding roller mechanism 3 to rotate, so that the sling 34 is released, and then the sling 34 drives the guide wheel 13 to rotate on the folding arm 11, so that the mounting ring 17 is lowered, so that the lifeboat is put into the water, and in the process of lowering the mounting ring 17, the telescopic rod 15 is extended through the link column 16, so as to limit the position of the mounting ring 17, so as to avoid the phenomenon that the sling 34 swings due to the relatively large wind on the water surface, improve the stability of the rotary crane when releasing the lifeboat, and increase the safety of the personnel on the lifeboat;

[0023] The first concave plate 12 is connected with the second concave plate 19 through the hydraulic rod 18, one end of the hydraulic rod 18 is movably connected in the interior of the other end of the first concave plate 12, the other end of the hydraulic rod 18 is movably connected in the interior of one end of the second concave plate 19, and the other end of the second concave plate 19 is fixedly connected to one side of the rotating seat 2, when the rotary crane is folded and stored, the output end of the hydraulic rod 18 is contracted, and in this process, the two ends of the hydraulic rod 18 are respectively rotated on the first concave plate 12 and the second concave plate 19, so that the hydraulic rod 18 drives the folding arm 11 to rotate on the boom 1, so as to store the rotary crane, reduce the occupation of the rotary crane to the ship space, and improve the flexibility of the rotary crane in use.

[0024] It is worth noting that, referring to Figure 3 and Figure 4The top end of the rotating seat 2 is movably connected with the other end of the boom 1, a countersunk bolt 21 is installed at the center of the rotating seat 2, the countersunk bolt 21 is connected with the output end of a driving motor 23 through a threaded hole 22, the driving motor 23 is fixedly connected at the center inside a base 27, a first recess 24 is formed on the periphery of the driving motor 23, a plurality of rolling balls 25 are movably connected inside the first recess 24, a second recess 26 is formed on the bottom of the rotating seat 2, 2 / 3 of the rolling balls 25 are located inside the inner wall of the first recess 24, 1 / 3 of the rolling balls 25 are located inside the second recess 26, the position of the first recess 24 corresponds to the position of the second recess 26, when the boom 1 rotates, the output end of the driving motor 23 drives the rotating seat 2 to rotate on the base 27, in the process, the rolling balls 25 rotate inside the first recess 24 and the second recess 26, so that the friction between the rotating seat 2 and the base 27 is reduced.

[0025] It is worth mentioning that, referring to Figure 1 The top end of the boom 1 is fixedly connected with a winding roller mechanism 3, one side of the winding roller mechanism 3 is fixedly connected with a first belt pulley 31, the first belt pulley 31 is connected with a second belt pulley 33 through a transmission belt 32, one side of the second belt pulley 33 is fixedly connected with the output end of a winding motor 37, a sling 34 is wound on the winding roller mechanism 3, the other end of the sling 34 passes through the middle of the two guide wheels 13 and is fixedly connected with the top end of a mounting ring 17, the other end of the mounting ring 17 is connected with a lifting hook 36 through a cable 35, when the slewing crane lifts the lifeboat, first, the lifting hook 36 is hung on the lifeboat, then the winding motor 37 drives the second belt pulley 33 to rotate, so that the second belt pulley 33 drives the first belt pulley 31 to rotate through the transmission belt 32, and then the first belt pulley 31 drives the winding roller on the winding roller mechanism 3 to rotate, so that the sling 34 is released or stored, and then the sling 34 drives the guide wheels 13 to rotate on the folding arm 11, so that the mounting ring 17 is lowered, and the mounting ring 17 drives the lifeboat on the lifting hook 36 to be lifted through the cable 35.

[0026] In addition, the components of the utility model are all general standard components or components known by the person skilled in the art, the structure and principle of which can be known by the person skilled in the art through a technical manual or through a conventional experimental method, and the person skilled in the art can realize it completely, and it is needless to say, and the content protected by the utility model does not involve the improvement of the internal structure and method.

[0027] The embodiment of the utility model discloses the preferable embodiment, but is not limited to this, the person skilled in the art, easily understands the spirit of the utility model according to the above embodiment, and makes different inferences and changes, but as long as not departing from the spirit of the utility model, all are within the protection scope of the utility model.

Claims

1. A lifeboat turnable crane comprising a jib (1), characterized in that, One end of the cantilever (1) is movably connected with a folding arm (11), the bottom end of the folding arm (11) is fixedly connected with a first concave plate (12), the other end of the folding arm (11) is movably connected with two guide wheels (13), the two sides of the other end of the folding arm (11) are fixedly connected with support columns (14), the support columns (14) are connected with two link columns (16) through two telescopic rods (15), two mounting rings (17) are fixedly connected between the two link columns (16), the first concave plate (12) is connected with a second concave plate (19) through a hydraulic rod (18).

2. A davit for a lifeboat as claimed in claim 1, characterised in that, One end of the two telescopic rods (15) is fixedly connected to the bottom end of the two support columns (14), the other end of the two telescopic rods (15) is fixedly connected to one end of the two link columns (16).

3. A davit for a lifeboat as claimed in claim 1 wherein, One end of the hydraulic rod (18) is movably connected inside the other end of the first concave plate (12), the other end of the hydraulic rod (18) is movably connected inside one end of the second concave plate (19), the other end of the second concave plate (19) is fixedly connected to one side of the rotating seat (2).

4. A davit for a lifeboat as claimed in claim 3, characterised in that, The top end of the rotating seat (2) is movably connected with the other end of the cantilever (1), a countersunk bolt (21) is installed at the center of the rotating seat (2), the countersunk bolt (21) is connected with the output end of a driving motor (23) through a threaded hole (22), the driving motor (23) is fixedly connected at the center inside the base (27), a first groove (24) is formed on the periphery of the driving motor (23), a plurality of rolling balls (25) are movably connected inside the first groove (24), a second groove (26) is formed at the bottom of the rotating seat (2).

5. A davit for a lifeboat as claimed in claim 4, wherein, Two-thirds of the rolling balls (25) are located on the inner wall of the first groove (24), one-third of the rolling balls (25) are located inside the second groove (26), the position of the first groove (24) corresponds to the position of the second groove (26).

6. A davit for a lifeboat as defined in claim 1, characterized in that The top end of the cantilever (1) is fixedly connected with a winding roller mechanism (3), one side of the winding roller mechanism (3) is fixedly connected with a first belt pulley (31), the first belt pulley (31) is connected with a second belt pulley (33) through a transmission belt (32), one side of the second belt pulley (33) is fixedly connected to the output end of a winding motor (37), a sling (34) is wound on the winding roller mechanism (3), the other end of the sling (34) passes through the middle of the two guide wheels (13) and is fixedly connected with the top end of the mounting ring (17), the other end of the mounting ring (17) is connected with a hook (36) through a cable (35).

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