Lifting device and water vehicle

Abstract

The utility model belongs to the technical field of lifting equipment, and particularly provides a lifting device and a water vehicle, the water vehicle comprises the lifting device, the lifting device comprises a bottom layer platform, a middle platform, a top layer fixing platform, a first rope pulling device and a second rope pulling device, a first pulley block is arranged on the bottom layer platform, and a first rope is wound on the first pulley block; one end of the first rope is connected with the first rope pulling device, the other end of the first rope is connected with the top-layer fixing platform, a pulley mechanism is arranged on the middle platform, a rope assembly is wound on the pulley mechanism, the two ends of the rope assembly are connected with the bottom-layer platform and the top-layer fixing platform respectively, and a second pulley block is arranged on the top-layer fixing platform. A second rope is wound on the second pulley block, one end of the second rope is connected with the second rope pulling device, and the other end of the second rope is connected with the middle platform. The first rope pulling device is matched with the second rope pulling device, so that the bottom layer platform and the middle platform can keep stable lifting speed.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of lifting devices, and particularly relates to a lifting device and a water vehicle. BACKGROUND

[0002] When working underwater, a lifting device is often used to take workers or equipment into the water. In order to adapt to the complexity of the environment, the lifting device is usually designed to be multi-stage telescopic. However, when the lifting device is multi-stage telescopic in the water, the lifting device is difficult to maintain a stable lifting speed due to the influence of the water buoyancy. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a lifting device and a water vehicle, and aims to solve the technical problem that the multi-stage telescopic lifting device in the prior art is difficult to maintain a stable lifting speed due to the influence of water buoyancy.

[0004] In one aspect, in order to achieve the above-mentioned purpose, the application adopts the technical scheme of a lifting device, comprising a bottom platform, an intermediate platform, a top fixed platform, a first rope puller and a second rope puller, the bottom platform, the intermediate platform and the top fixed platform are sequentially and slidably connected, the bottom platform is provided with a first pulley block, the first pulley block is provided with a first rope, one end of the first rope is connected with the first rope puller, the other end of the first rope is connected with the top fixed platform, the intermediate platform is provided with a pulley mechanism, the pulley mechanism is provided with a rope assembly, both ends of the rope assembly are connected with the bottom platform and the top fixed platform respectively, the top fixed platform is provided with a second pulley block, the second pulley block is provided with a second rope, one end of the second rope is connected with the second rope puller, the other end of the second rope is connected with the intermediate platform.

[0005] Compared with the prior art, the lifting device provided by the application has the beneficial effects that when the bottom platform and the intermediate platform need to be lowered, the first rope puller releases the first rope, the bottom platform freely descends under the action of gravity, and the intermediate platform descends through the cooperation and linkage of the rope assembly and the pulley mechanism, and the second rope puller synchronously tightens the second rope, so as to control the descending speed of the bottom platform and the intermediate platform, so that the bottom platform and the intermediate platform maintain a stable descending speed. When the bottom platform and the intermediate platform need to be raised, the first rope puller tightens the first rope, the bottom platform is raised under the pulling of the first rope, and the intermediate platform is raised through the cooperation and linkage of the rope assembly and the pulley mechanism, and the second rope puller synchronously releases the second rope, so as to control the ascending speed of the bottom platform and the intermediate platform, so that the bottom platform and the intermediate platform maintain a stable ascending speed. The first rope puller and the second rope puller cooperate to control the ascending and descending speed of the bottom platform and the intermediate platform, reduce the influence of water buoyancy on the bottom platform and the intermediate platform, and enable the bottom platform and the intermediate platform to maintain a stable ascending and descending speed.

[0006] Further, the intermediate platform comprises at least two sub-platforms, the plurality of sub-platforms are sequentially connected in sliding mode, the pulley mechanism comprises a plurality of sub-pulley sets, and the rope assembly comprises a plurality of sub-ropes; each of the sub-platforms is provided with a sub-pulley set, and each of the sub-pulley sets is wound with a sub-rope;

[0007] The two ends of the sub-rope wound on the sub-pulley set of the sub-platform are connected with the adjacent two platforms of the sub-platform respectively.

[0008] Further, the number of the sub-platforms is three, the sub-platform connected with the bottom platform in sliding mode is a first sub-platform, the sub-platform connected with the top fixed platform in sliding mode is a third sub-platform, and the sub-platform between the first sub-platform and the third sub-platform is a second sub-platform;

[0009] The two ends of the sub-rope wound on the sub-pulley set of the first sub-platform are connected with the bottom platform and the second sub-platform respectively, the two ends of the sub-rope wound on the sub-pulley set of the second sub-platform are connected with the first sub-platform and the third sub-platform respectively, the two ends of the sub-rope wound on the sub-pulley set of the third sub-platform are connected with the second sub-platform and the top fixed platform respectively, and the end of the second rope away from the second pulley is connected with the third sub-platform.

[0010] Further, the adjacent two platforms are connected in sliding mode, and the platform in the inner relative position can locally extend out of the platform in the outer relative position in the first direction.

[0011] Further, the plurality of platforms are sequentially arranged from inside to outside, the sliding mechanism is arranged between each of the adjacent two platforms, and each of the adjacent two platforms is connected in sliding mode through the sliding mechanism; the plurality of sliding mechanisms from inside to outside are alternately a first sliding mechanism and a second sliding mechanism, and the first sliding mechanism and the second sliding mechanism are respectively located on different sides of the bottom platform.

[0012] Further, the first sliding mechanism comprises two first sliding assemblies, the two first sliding assemblies are respectively located on the opposite sides of the bottom platform in the second direction; the second sliding mechanism comprises two second sliding assemblies, the two second sliding assemblies are respectively located on the opposite sides of the bottom platform in the third direction; and the third direction is perpendicular to the second direction.

[0013] Further, the bottom platform, the plurality of sub-platforms and the top fixed platform are sequentially connected in sliding mode from inside to outside; the first pulley set is arranged at the bottom of the bottom platform, the sub-pulley set is arranged at the bottom of the sub-platform, and the second pulley set is arranged at the bottom of the top fixed platform; and the bottom of the sub-platform and the bottom of the top fixed platform are both provided with a fixed part.

[0014] The first rope is connected with the fixed part of the top fixed platform at one end away from the first rope pulley, and the second rope is connected with the fixed part of the adjacent sub-platform at one end away from the second rope pulley, and the two ends of the sub-rope of the sub-pulley set on the sub-platform are connected with the top of the platform adjacent to the inner side of the sub-platform and the fixed part of the platform adjacent to the outer side of the sub-platform respectively.

[0015] Further, the first pulley set comprises a first support and a first pulley arranged on the first support, and the first rope is arranged around the first pulley; the second pulley set comprises a second support and a second pulley arranged on the second support, and the second rope is arranged around the second pulley, and the fixed part of the top fixed platform is arranged on the second support; the sub-pulley set comprises a third support and a sub-pulley arranged on the third support, and the sub-rope is arranged around the sub-pulley, and the fixed part of the sub-platform is arranged on the third support; the second support and the third support are located on the same side of the bottom platform.

[0016] Further, the fixed part is a lifting ring.

[0017] On the other hand, to achieve the above-mentioned purpose, the technical scheme adopted by the present application is: a water vehicle, comprising a ship body and the lifting device described above, and the lifting device is arranged on the ship body.

[0018] Compared with the prior art, the water vehicle provided by the present application has the beneficial effects that: the lifting device described above is adopted, when the bottom platform and the intermediate platform need to be lowered, the first rope pulley releases the first rope, the bottom platform freely descends under the action of gravity, and the intermediate platform descends through the cooperation and linkage of the rope assembly and the pulley mechanism, the second rope pulley synchronously tightens the second rope, so as to control the descending speed of the bottom platform and the intermediate platform, so that the bottom platform and the intermediate platform maintain a stable descending speed. When the bottom platform and the intermediate platform need to be raised, the first rope pulley tightens the first rope, the bottom platform is raised under the pulling of the first rope, and the intermediate platform is raised through the cooperation and linkage of the rope assembly and the pulley mechanism, the second rope pulley synchronously releases the second rope, so as to control the ascending speed of the bottom platform and the intermediate platform, so that the bottom platform and the intermediate platform maintain a stable ascending speed. Through the cooperation of the first rope pulley and the second rope pulley, the present application can control the ascending and descending speed of the bottom platform and the intermediate platform, reduce the influence of the water buoyancy on the bottom platform and the intermediate platform, and make the bottom platform and the intermediate platform maintain a stable ascending and descending speed. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A.

[0021] Figure 2 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A. Figure 1 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A.

[0022] Figure 3 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A.

[0023] Figure 4 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A. Figure 3 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A.

[0024] Figure 5 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A. Figure 1 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A.

[0025] Figure 6 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A. Figure 5 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A.

[0026] Figure 7 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A. Figure 1 A perspective view of the lifting device in the contracted state according to an embodiment of the present application is shown in FIG. 1A.

[0027] In the drawings, various reference numbers refer to the following:

[0028] 10, bottom platform;

[0029] 20, middle platform; 21, sub-platform; 211, first sub-platform; 212, second sub-platform; 213, third sub-platform;

[0030] 30, top fixed platform;

[0031] 40, first pull rope device;

[0032] 50, second pull rope device;

[0033] 60, first pulley block; 61, first support; 62, first pulley;

[0034] 70, first rope;

[0035] 80, pulley mechanism; 81, sub-pulley block; 811, first sub-pulley block; 812, second sub-pulley block; 813, third sub-pulley block; 814, third support; 815, sub-pulley;

[0036] 90, rope assembly; 91, sub-rope; 911, first sub-rope; 912, second sub-rope; 913, third sub-rope;

[0037] 100, second pulley block; 101, second support; 102, second pulley;

[0038] 110, second rope;

[0039] 130, first sliding assembly;

[0040] 140, second sliding assembly;

[0041] 150, fixed part;

[0042] 160, positioning part;

[0043] 170, top fixed pulley. DETAILED DESCRIPTION

[0044] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0045] In the description of the present application, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0046] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0047] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] Please refer to Figures 1 to 5The embodiment of the present application provides a lifting device, which comprises a bottom platform 10, an intermediate platform 20, a top fixed platform 30, a first pull rope device 40 and a second pull rope device 50, the bottom platform 10, the intermediate platform 20 and the top fixed platform 30 are sequentially and slidably connected, the bottom platform 10 is provided with a first pulley set 60, the first pulley set 60 is provided with a first rope 70, one end of the first rope 70 is connected with the first pull rope device 40, the other end of the first rope 70 is connected with the top fixed platform 30, the intermediate platform 20 is provided with a pulley mechanism 80, the pulley mechanism 80 is provided with a rope assembly 90, two ends of the rope assembly 90 are respectively connected with the bottom platform 10 and the top fixed platform 30, the top fixed platform 30 is provided with a second pulley set 100, the second pulley set 100 is provided with a second rope 110, one end of the second rope 110 is connected with the second pull rope device 50, the other end of the second rope 110 is connected with the intermediate platform 20.

[0049] When the bottom platform 10 and the intermediate platform 20 need to be lowered, the first pull rope device 40 releases the first rope 70, the bottom platform 10 freely falls under the action of gravity, and the intermediate platform 20 falls through the cooperation and linkage of the rope assembly 90 and the pulley mechanism 80, the second pull rope device 50 synchronously tightens the second rope 110, so that the falling speed of the bottom platform 10 and the intermediate platform 20 can be controlled, and the bottom platform 10 and the intermediate platform 20 can maintain a stable falling speed. When the bottom platform 10 and the intermediate platform 20 need to be raised, the first pull rope device 40 tightens the first rope 70, the bottom platform 10 is raised under the pulling of the first rope 70, and the intermediate platform 20 is raised through the cooperation and linkage of the rope assembly 90 and the pulley mechanism 80, the second pull rope device 50 synchronously releases the second rope 110, so that the rising speed of the bottom platform 10 and the intermediate platform 20 can be controlled, and the bottom platform 10 and the intermediate platform 20 can maintain a stable rising speed. Through the cooperation of the first pull rope device 40 and the second pull rope device 50, the rising and falling speed of the bottom platform 10 and the intermediate platform 20 can be controlled, the influence of the water buoyancy on the bottom platform 10 and the intermediate platform 20 is reduced, and the bottom platform 10 and the intermediate platform 20 can maintain a stable rising and falling speed.

[0050] When the lifting device does not work, the first pull rope device 40 holds the first rope 70 and does not allow the first rope 70 to fall down, at this time, one end of the first rope 70 connected with the first pull rope device 40 and one end of the first rope 70 connected with the top fixed platform 30 are fixed, so that the first rope 70 can lift the bottom platform 10 through the first pulley set 60 and maintain the height of the bottom platform 10 stable, because the height of the bottom platform 10 is stable, one end of the rope assembly 90 connected with the bottom platform 10 and one end of the rope assembly 90 connected with the top fixed platform 30 are fixed, so that the rope assembly 90 can lift the intermediate platform 20 through the pulley mechanism 80 and maintain the height of the intermediate platform 20 stable.

[0051] Specifically, the first and second pull rope devices 40 and 50 can be selected as motors, and the rotation of the motors can realize the winding and releasing of the first and second ropes 70 and 110. The selected motors can accurately control the winding and releasing speed of the first and second ropes 70 and 110, thereby accurately controlling the lifting speed of the bottom platform 10 and the intermediate platform 20.

[0052] In one embodiment, in combination with Figure 5 and Figure 6 As shown in the drawings, the intermediate platform 20 includes at least two sub-platforms 21, and the plurality of sub-platforms 21 are sequentially and slidably connected. The pulley mechanism 80 includes a plurality of sub-pulley sets 81, and the rope assembly 90 includes a plurality of sub-ropes 91. Each of the sub-platforms 21 is provided with a sub-pulley set 81, and each of the sub-pulley sets 81 is wound with a sub-rope 91. The two ends of the sub-rope 91 wound on the sub-pulley set 81 of the sub-platform 21 are respectively connected with the adjacent two platforms of the sub-platform 21.

[0053] It should be noted that the "platform" mentioned above can be the bottom platform 10, the sub-platform 21 in the intermediate platform 20, or the top fixed platform 30. Exemplarily, the following will be explained and described respectively in the case that the number of sub-platforms 21 is two and the number of sub-platforms 21 is three.

[0054] When the number of sub-platforms 21 is two, for the convenience of explanation and description, the two sub-platforms 21 are respectively named as a lower sub-platform 21 and an upper sub-platform 21. The lower sub-platform 21 is slidably connected with the bottom platform 10, and the upper sub-platform 21 is slidably connected with the top fixed platform 30. At this time, the two ends of the sub-rope 91 wound on the sub-pulley set 81 of the lower sub-platform 21 are respectively connected with the bottom platform 10 and the upper sub-platform 21. The two ends of the sub-rope 91 wound on the sub-pulley set 81 of the upper sub-platform 21 are respectively connected with the upper sub-platform 21 and the top fixed platform 30. The end of the second rope 110 away from the second pull rope device 50 is connected with the upper sub-platform 21.

[0055] When it is needed to lower the bottom platform 10, the upper sub-platform 21 and the lower sub-platform 21, the first pull rope device 40 releases the first rope 70. The bottom platform 10 freely falls under the action of gravity, and the lower sub-platform 21 falls through the cooperation and linkage of the sub-rope 91 and the sub-pulley set 81. When the lower sub-platform 21 falls, the upper sub-platform 21 falls through the cooperation and linkage of the sub-rope 91 and the sub-pulley set 81. The second pull rope device 50 synchronously tightens the second rope 110, thereby being able to control the falling speed of the bottom platform 10, the lower sub-platform 21 and the upper sub-platform 21, so that the bottom platform 10, the lower sub-platform 21 and the upper sub-platform 21 maintain a stable falling speed.

[0056] When it is necessary to raise the bottom platform 10, the lower sub-platform 21 and the upper sub-platform 21, the first rope puller 40 tightens the first rope 70, and the bottom platform 10 is raised under the pull of the first rope 70, and the lower sub-platform 21 is linked to rise by the cooperation of the sub-rope 91 and the sub-pulley group 81. When the lower sub-platform 21 rises, the upper sub-platform 21 is linked to rise by the cooperation of the sub-rope 91 and the sub-pulley group 81, and the second rope puller 50 synchronously releases the second rope 110, thereby controlling the descending speed of the bottom platform 10, the lower sub-platform 21 and the upper sub-platform 21, so that the bottom platform 10, the lower sub-platform 21 and the upper sub-platform 21 maintain a stable ascending speed.

[0057] The bottom platform 10, the lower sub-platform 21 and the upper sub-platform 21 are connected in series by using the sub-rope 91. Through the cooperation of the sub-rope 91 and the sub-pulley group 81, the bottom platform 10 can link the lower sub-platform 21 and the upper sub-platform 21 to rise and fall at the same time. There is no need to configure a rope pulling device for each of the bottom platform 10, the lower sub-platform 21 and the upper sub-platform 21, thereby simplifying the device structure and reducing the volume and weight of the device.

[0058] When the number of sub-platforms 21 is three, Figure 5 and Figure 6 As shown, the sub-platform 21 that is slidingly connected to the bottom platform 10 is the first sub-platform 211, the sub-platform 21 that is slidingly connected to the top fixed platform 30 is the third sub-platform 213, and the sub-platform 21 located between the first sub-platform 211 and the third sub-platform 213 is the second sub-platform 212; the two ends of the sub-rope 91 of the sub-pulley group 81 wound around the first sub-platform 211 are respectively connected to the bottom platform 10 and the second sub-platform 212, the two ends of the sub-rope 91 of the sub-pulley group 81 wound around the second sub-platform 212 are respectively connected to the first sub-platform 211 and the third sub-platform 213, the two ends of the sub-rope 91 of the sub-pulley group 81 wound around the third sub-platform 213 are respectively connected to the second sub-platform 212 and the top fixed platform 30, and the end of the second rope 110 away from the second rope puller 50 is connected to the third sub-platform 213.

[0059] For the sake of convenience of explanation, the sub-pulley group 81 set on the first sub-platform 211 is named as the first sub-pulley group 811, the sub-rope 91 wound around the first sub-pulley group 811 is named as the first sub-rope 911, the sub-pulley group 81 set on the second sub-platform 212 is named as the second sub-pulley group 812, the sub-rope 91 wound around the second sub-pulley group 812 is named as the second sub-rope 912, the sub-pulley group 81 set on the third sub-platform 213 is named as the third sub-pulley group 813, and the sub-rope 91 wound around the third sub-pulley group 813 is named as the third sub-rope 913.

[0060] When the bottom platform 10, the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213 need to be lowered, the first rope tightener 40 releases the first rope 70, the bottom platform 10 freely falls under the action of gravity, and the first sub-platform 211 falls through the cooperation of the first sub-rope 911 and the first sub-pulley set 811, the second sub-platform 212 falls through the cooperation of the second sub-rope 912 and the second sub-pulley set 812 when the first sub-platform 211 falls, and the third sub-platform 213 falls through the cooperation of the third sub-rope 913 and the third sub-pulley set 813 when the second sub-platform 212 falls, the second rope tightener 50 synchronously tightens the second rope 110, so as to control the falling speed of the bottom platform 10, the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213, so that the bottom platform 10, the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213 maintain a stable falling speed.

[0061] When the bottom platform 10, the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213 need to be raised, the first rope tightener 40 tightens the first rope 70, the bottom platform 10 is raised under the pulling of the first rope 70, and the first sub-platform 211 is raised through the cooperation of the first sub-rope 911 and the first sub-pulley set 811, the second sub-platform 212 is raised through the cooperation of the second sub-rope 912 and the second sub-pulley set 812 when the first sub-platform 211 is raised, and the third sub-platform 213 is raised through the cooperation of the third sub-rope 913 and the third sub-pulley set 813 when the second sub-platform 212 is raised, the second rope tightener 50 synchronously releases the second rope 110, so as to control the falling speed of the bottom platform 10, the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213, so that the bottom platform 10, the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213 maintain a stable rising speed.

[0062] The first sub-rope 911, the second sub-rope 912 and the third sub-rope 913 are used to connect the bottom platform 10, the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213 in series, through the cooperation of the first sub-rope 911 and the first sub-pulley set 811, the cooperation of the second sub-rope 912 and the second sub-pulley set 812, and the cooperation of the third sub-rope 913 and the third sub-pulley set 813, the bottom platform 10 can be linked with the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213 to rise and fall at the same time, without needing to configure a rope tightening device for each of the bottom platform 10, the first sub-platform 211, the second sub-platform 212 and the third sub-platform 213, so as to simplify the structure of the device and reduce the volume and weight of the device.

[0063] Of course, the number of sub-platforms 21 can also be four, five, six, seven or more than seven, and those skilled in the art can deduce from the above examples, and the following will not be explained one by one.

[0064] In one embodiment, in combination with Figure 1 and Figure 3 As shown, the adjacent two platforms are slidingly sleeved, and the platform located inside the relative position can partially protrude out of the platform located outside in the first direction. Similarly, in this embodiment, the "platform" can be the bottom platform 10, or the sub-platform 21 in the middle platform 20, or the top fixed platform 30. The platforms are connected in a sleeved manner, which can make the overall structure more compact on the one hand, and can guide the movement of the platform on the other hand, so that the platform can stably slide in the first direction or the opposite direction of the first direction, which is vertically downward or obliquely downward in actual application, thereby realizing the lifting effect. The bottom platform 10, each sub-platform 21 in the middle platform 20 and the top fixed platform 30 can be arranged from inside to outside in sequence, at this time, the cross-sectional size of the bottom platform 10 is the smallest, and the cross-sectional size of the top fixed platform 30 is the largest; of course, the bottom platform 10, each sub-platform 21 in the middle platform 20 and the top fixed platform 30 can also be arranged from outside to inside in sequence, at this time, the cross-sectional size of the bottom platform 10 is the largest, and the cross-sectional size of the top fixed platform 30 is the smallest.

[0065] In one embodiment, the plurality of platforms are arranged from inside to outside in sequence, a sliding mechanism is arranged between each adjacent two platforms, and each adjacent two platforms are slidingly connected through the sliding mechanism; the plurality of sliding mechanisms from inside to outside are alternately first sliding mechanisms and second sliding mechanisms, and the first sliding mechanisms and the second sliding mechanisms are respectively located on different sides of the bottom platform 10. The first sliding mechanisms and the second sliding mechanisms are respectively located on different sides of the bottom platform 10, which can avoid the size of the lifting device being too large in a single direction, thereby improving the adaptability of the lifting device to complex environments, and also reducing the production and assembly difficulty of the lifting device. Specifically, the number of platforms is five, and the five platforms are respectively the bottom platform 10, the first sub-platform 211, the second sub-platform 212, the third sub-platform 213 and the top fixed platform 30, at this time, the sliding mechanism arranged between the bottom platform 10 and the first sub-platform 211 is the first sliding mechanism, the sliding mechanism arranged between the first sub-platform 211 and the second sub-platform 212 is the second sliding mechanism, the sliding mechanism arranged between the second sub-platform 212 and the third sub-platform 213 is the first sliding mechanism, and the sliding mechanism arranged between the third sub-platform 213 and the top fixed platform 30 is the second sliding structure.

[0066] In one embodiment, as shown in Figure 7As shown, the first sliding mechanism includes two first sliding assemblies 130, which are respectively located on opposite sides of the bottom layer platform 10 in the second direction; the second sliding mechanism includes two second sliding assemblies 140, which are respectively located on opposite sides of the bottom layer platform 10 in the third direction; the third direction is perpendicular to the second direction.

[0067] Firstly, the first sliding mechanism includes two first sliding assemblies 130 distributed at intervals, and the second sliding mechanism includes two second sliding assemblies 140 distributed at intervals, which can improve the stability during sliding. Secondly, the two first sliding assemblies 130 of the first sliding mechanism are distributed on opposite sides of the bottom layer platform 10 along the second direction, and the two second sliding assemblies 140 of the second sliding mechanism are distributed on opposite sides of the bottom layer platform 10 along the third direction, and the third direction is perpendicular to the second direction. In this way, the size of the lifting device in a single direction can be avoided to be too large, and the size of the lifting device in the second direction and the size of the lifting device in the third direction are equal or close to equal, thereby improving the adaptability of the lifting device to complex environments, and additionally, the production and assembly difficulty of the lifting device can be reduced.

[0068] Specifically, the first sliding assembly 130 includes two first sliding rails and two first sliding blocks, the two first sliding rails are arranged at intervals along the third direction, and the two first sliding blocks are respectively connected with the two first sliding rails in sliding mode, and the first sliding block and the first sliding rail are respectively arranged on two adjacent platforms; the second sliding assembly 140 includes two second sliding rails and two second sliding blocks, the two second sliding rails are arranged at intervals along the second direction, and the two second sliding blocks are respectively connected with the two second sliding rails in sliding mode, and the second sliding block and the second sliding rail are respectively arranged on two adjacent platforms.

[0069] In one embodiment, in combination with Figure 2 and Figure 5As shown, the bottom platform 10, multiple sub-platforms 21, and top fixed platform 30 are slidably connected from the inside out. A first pulley block 60 is provided at the bottom of the bottom platform 10, a sub-pulley block 81 is provided at the bottom of the sub-platform 21, and a second pulley block 100 is provided at the bottom of the top fixed platform 30. A fixing portion 150 is provided at the bottom of each sub-platform 21 and the bottom of the top fixed platform 30. The end of the first rope 70 away from the first rope puller 40 is connected to the top of the top fixed platform 30, and the end of the second rope 110 away from the second rope puller 50 is connected to the top of the adjacent sub-platform 21. The ends of the sub-rope 91 wound around the sub-pulley block 81 of the sub-platform 21 are respectively connected to the fixing portions 150 of the top and bottom of the adjacent platform on the inside and outside of the sub-platform 21. Each rope has its ends connected to the fixing portions 150 at the top and bottom of the two adjacent platforms, respectively. This arrangement ensures smoother and more stable platform lifting. It should be noted that the aforementioned ropes may be the first rope 70 , the sub-rope 91 and the second rope 110 .

[0070] Specifically, the figure shows three sub-platforms 21, namely the first sub-platform 211, the second sub-platform 212, and the third sub-platform 213. At this time, the two ends of the first sub-rope 911 are respectively connected to the top of the bottom platform 10 and the fixing portion 150 of the second sub-platform 212. The two ends of the second sub-rope 912 are respectively connected to the top of the first sub-platform 211 and the fixing portion 150 of the third sub-platform 213. The two ends of the third sub-rope 913 are respectively connected to the top of the second sub-platform 212 and the fixing portion 150 of the top fixed platform 30. The end of the second rope 110 away from the second rope puller 50 is connected to the top of the third sub-platform 213. Specifically, the fixing portion 150 is a lifting ring to facilitate rope binding and fixation.

[0071] In one embodiment, Figure 5 As shown, a positioning portion 160 is provided at the top of the platform. The end of the first rope 70 away from the first rope puller 40 is connected to the positioning portion 160 of the top fixed platform 30. The end of the second rope 110 away from the second rope puller 50 is connected to the positioning portion 160 of the adjacent sub-platform 21. The ends of the sub-rope 91 wound around the sub-pulley assembly 81 of the sub-platform 21 are respectively connected to the positioning portion 160 of the platform adjacent to the inner side of the sub-platform 21 and the fixing portion 150 of the platform adjacent to the outer side. Specifically, the positioning portion 160 can be a lifting ring to facilitate rope binding and fixation.

[0072] In one embodiment, combined Figure 2 、 Figure 4 and Figure 5As shown, the first pulley set 60 comprises a first support 61 and a first pulley 62 arranged on the first support 61, and the first rope 70 is arranged around the first pulley 62; the second pulley set 100 comprises a second support 101 and a second pulley 102 arranged on the second support 101, and the second rope 110 is arranged around the second pulley 102, and the fixing part 150 of the top fixed platform 30 is arranged on the second support 101; the sub-pulley set 81 comprises a third support 814 and a sub-pulley 815 arranged on the third support 814, and the sub-rope 91 is arranged around the sub-pulley 815, and the fixing part 150 of the sub-platform 21 is arranged on the third support 814, and the second support 101 and the third support 814 are located on the same side of the bottom platform 10. The second support 101 is used for mounting the second pulley 102 on one hand, and is used for providing the fixing part 150 to fix the sub-rope 91 on the other hand, and the third support 814 is used for mounting the sub-pulley 815 on one hand, and is used for providing the fixing part 150 to fix the sub-rope 91 on the other hand. By arranging the second support 101 and the third support 814 on the same side of the bottom platform 10, the sub-rope 91 is connected with the fixing part 150 of the second support 101 or the fixing part 150 of the third support 814 after passing through the sub-pulley 815, thereby facilitating the connection.

[0073] Specifically, the first pulley 62 and the sub-pulley 815 are both movable pulleys, so that it is more labor-saving to pull the bottom platform 10 and the sub-platform 21, and the second pulley 102 is a fixed pulley, which can change the direction of the second rope 110, so that the second rope puller 50 is more flexible in spatial arrangement.

[0074] In one embodiment, the bottom platform 10, the sub-platform 21 and the top fixed platform 30 are all hollow frame structures, which are built by a plurality of frame strips, and have the advantages of simple structure and low manufacturing cost, and are convenient for realizing the sliding sleeve connection of adjacent two platforms.

[0075] In one embodiment, as shown in the drawings, Figure 5 The top of the top fixed platform 30 is provided with a top fixed pulley 170, and the first rope 70 is connected with the first rope puller 40 after passing through the top fixed pulley 170. By arranging the top fixed pulley 170 on the top of the top fixed platform 30, the direction of the first rope 70 can be changed, so that the first rope puller 40 is more flexible in spatial arrangement.

[0076] The application also provides a water vehicle, which comprises a hull and the lifting device described above, and the lifting device is arranged on the hull, wherein the top layer fixing platform 30 of the lifting device is fixed on the hull, the middle platform 20 and the bottom layer platform 10 can move up and down relative to the hull, and the lifting device can be used to send workers or equipment into water to perform underwater work. By using the lifting device described above, the lifting speed of the bottom layer platform 10 and the middle platform 20 can be controlled through the cooperation of the first pull rope device 40 and the second pull rope device 50, the influence of the water buoyancy on the bottom layer platform 10 and the middle platform 20 is reduced, and the bottom layer platform 10 and the middle platform 20 can maintain a stable lifting speed.

[0077] It should be noted that the above only describes the preferred embodiments of the application, and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A lifting device, characterized in that The utility model provides a platform, including bottom platform (10), intermediate platform (20), top fixed platform (30), first pull rope device (40) and second pull rope device (50), bottom platform (10), intermediate platform (20) and top fixed platform (30) are connected in turn, first pulley block (60) is provided on bottom platform (10), first pulley block (60) is provided with first rope (70) around, one end of first rope (70) is connected with first pull rope device (40), the other end of first rope (70) is connected with top fixed platform (30), pulley mechanism (80) is provided on intermediate platform (20), pulley mechanism (80) is provided with rope assembly (90) around, both ends of rope assembly (90) are connected with bottom platform (10) and top fixed platform (30) respectively, second pulley block (100) is provided on top fixed platform (30), second pulley block (100) is provided with second rope (110) around, one end of second rope (110) is connected with second pull rope device (50), the other end of second rope (110) is connected with intermediate platform (20).

2. The lift device of claim 1, wherein: Intermediate platform (20) includes at least two sub platforms (21), a plurality of sub platforms (21) are connected in turn, pulley mechanism (80) includes a plurality of sub pulley blocks (81), and rope assembly (90) includes a plurality of sub ropes (91), one sub pulley block (81) is arranged on each sub platform (21), and one sub rope (91) is arranged on each sub pulley block (81). Both ends of the sub rope (91) of the sub pulley block (81) around the sub platform (21) are connected with two adjacent platforms of the sub platform (21) respectively.

3. The lift device of claim 2, wherein: The number of sub platforms (21) is three, the sub platform (21) connected with bottom platform (10) is first sub platform (211), the sub platform (21) connected with top fixed platform (30) is third sub platform (213), and the sub platform (21) between first sub platform (211) and third sub platform (213) is second sub platform (212). Both ends of the sub rope (91) of the sub pulley block (81) around first sub platform (211) are connected with bottom platform (10) and second sub platform (212) respectively, both ends of the sub rope (91) of the sub pulley block (81) around second sub platform (212) are connected with first sub platform (211) and third sub platform (213) respectively, both ends of the sub rope (91) of the sub pulley block (81) around third sub platform (213) are connected with second sub platform (212) and top fixed platform (30) respectively, and one end of second rope (110) away from second pull rope device (50) is connected with third sub platform (213).

4. The lift device of claim 2, wherein: Two adjacent platforms are slidingly connected, and the inner platform can partially extend out of the outer platform in a first direction.

5. The lift device of claim 4, wherein: A plurality of platforms are arranged from inside to outside, and a sliding mechanism is arranged between each adjacent two platforms, and each adjacent two platforms are slidingly connected by the sliding mechanism; the plurality of sliding mechanisms from inside to outside are alternately first sliding mechanisms and second sliding mechanisms, and the first sliding mechanisms and the second sliding mechanisms are respectively located on different sides of the bottom platform (10).

6. The lift device of claim 5, wherein: The first sliding mechanism comprises two first sliding assemblies (130), and the two first sliding assemblies (130) are respectively located on opposite sides of the bottom platform (10) in a second direction; the second sliding mechanism comprises two second sliding assemblies (140), and the two second sliding assemblies (140) are respectively located on opposite sides of the bottom platform (10) in a third direction; the third direction is perpendicular to the second direction.

7. The lift device of claim 2, wherein: The bottom platform (10), a plurality of sub-platforms (21) and the top fixed platform (30) are slidingly connected from inside to outside; the first pulley set (60) is arranged at the bottom of the bottom platform (10), the sub-pulley set (81) is arranged at the bottom of the sub-platform (21), and the second pulley set (100) is arranged at the bottom of the top fixed platform (30); the bottom of the sub-platform (21) and the top of the top fixed platform (30) are provided with a fixed part (150); One end of the first rope (70) away from the first rope puller (40) is connected with the top of the top fixed platform (30), one end of the second rope (110) away from the second rope puller (50) is connected with the top of the adjacent sub-platform (21), and the two ends of the sub-rope (91) of the sub-pulley set (81) arranged on the sub-platform (21) are respectively connected with the top of the inner adjacent platform and the fixed part (150) of the outer adjacent platform of the sub-platform (21).

8. The lift device of claim 7, wherein: The first pulley set (60) comprises a first support (61) and a first pulley (62) arranged on the first support (61), and the first rope (70) is arranged around the first pulley (62); the second pulley set (100) comprises a second support (101) and a second pulley (102) arranged on the second support (101), and the second rope (110) is arranged around the second pulley (102), and the fixing part (150) of the top layer fixing platform (30) is arranged on the second support (101); the sub pulley set (81) comprises a third support (814) and a sub pulley (815) arranged on the third support (814), and the sub rope (91) is arranged around the sub pulley (815), and the fixing part (150) of the sub platform (21) is arranged on the third support (814); the second support (101) and the third support (814) are both located on the same side of the bottom layer platform (10).

9. The lift device of claim 7, wherein: The fixing part (150) is a lifting ring.

10. A watercraft, characterized by A lifting device as claimed in any one of claims 1-9, arranged on a hull.

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