Movable cantilever hoisting mechanism

Abstract

The utility model relates to the technical field of cranes, in particular to a movable cantilever lifting mechanism, which comprises a movable pulley lifting appliance, a lifting arm, a lifting arm support component and a lifting arm movement driving component, a front side slide way sliding block structure in the lifting arm supporting assembly comprises a slide way installed on an upper cover plate of a main beam and a sliding block matched with the slide way and installed on the lower surface of a lifting arm, a rear side abutting structure comprises a 7-shaped abutting track, and the upper side of the rear end of the lifting arm abuts against the abutting track in a sliding mode. A driving chain wheel structure and a driven chain wheel structure in the lifting arm movement driving assembly are arranged on the two sides of the sliding way respectively, a chain is connected to the driving chain wheel structure and the driven chain wheel structure in a sleeving mode, and a lifting arm is fixedly connected with the chain. According to the utility model, the lifting and translation of the lifting appliance are realized, and the translation process provides balance through the front side slide way slide block structure and the rear side abutting structure, so that the safety is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hoist, and particularly provides a movable cantilever lifting mechanism. BACKGROUND

[0002] With the development of economy, the number of yachts owned by various countries increases greatly, and thus the maintenance and repair of yachts also increase. During the maintenance and repair of yachts, the yachts need to be transported between the sea and the land maintenance site, which requires a special yacht transporting device. Since the yachts are large in size, heavy in weight and mostly long and thin, the device needs to have multiple lifting points, and in order to ensure the safety and reliability during lifting, all or part of the lifting points should be movable to adjust the position of the lifting points, so as to make the lifting center and the center of gravity of the yacht consistent as much as possible, thereby ensuring the stability during lifting. Therefore, the present application provides a movable cantilever lifting mechanism suitable for yacht transporting. SUMMARY

[0003] In order to solve the above technical problems, the utility model provides a movable cantilever lifting mechanism.

[0004] The utility model is realized in this way, provide a movable cantilever lifting mechanism, including movable pulley sling, hoist arm, hoist arm support subassembly and hoist arm movement drive subassembly, movable pulley sling is hung in hoist arm front end, hoist arm support subassembly includes front side slide way slider structure and rear side abutment structure, front side slide way slider structure includes the slide way of installation on the cover plate of main girder and the slider matching with slide way, installation on the lower surface of hoist arm, rear side abutment structure includes the abutment track of '' 7 '' type, the upper side of the rear end of hoist arm is slid and abuts on abutment track, hoist arm movement drive subassembly includes driving sprocket structure, passive sprocket structure and chain, driving sprocket structure, passive sprocket structure are separately arranged on the both sides of slide way, chain is sleeved on driving sprocket structure, passive sprocket structure, hoist arm is fixedly connected with chain.

[0005] Preferably, the lower surface of the horizontal section of the abutment track is provided with an abutment track, and the upper side of the rear end of the hoist arm is provided with a rear slider, which abuts on the abutment track.

[0006] Preferably, a groove is provided at the lower end of the side away from the movable pulley sling of the slide way, and a safety barb is provided on the lower surface of the hoist arm, with the end of the safety barb extending into the groove.

[0007] Preferably, an upper chain passage and two lower chain fixed ends are provided on the hoist arm, the chain passes through the upper chain passage, and the two ends are connected to the two lower chain fixed ends after passing around the driving sprocket structure and the passive sprocket structure, respectively.

[0008] Preferably, the sliding block is a semicircular sliding block, and the slide is a semicircular slide in cross section.

[0009] Preferably, the movable pulley hoist is hung on the fixed pulley block of the lifting arm through a steel wire rope, one end of the steel wire rope is connected with the winch, and the other end is connected with a fixed end of the steel wire rope.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The utility model provides a movable cantilever lifting mechanism, can realize lifting and translation of hoist, and provides balance through front side slide sliding block structure and rear side abutting structure in translation process, high safety. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further explained in detail in combination with the drawings and embodiments:

[0013] Figure 1 It is the front view structure schematic diagram of the utility model;

[0014] Figure 2 It is the side view structure schematic diagram of the utility model of removing lifting arm movement drive assembly;

[0015] Figure 3 It is the plan view structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the utility model will be further explained in detail in combination with the drawings and embodiments.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0017] Reference Figure 1 , Figure 2 and Figure 3 The utility model provides a movable cantilever lifting mechanism, including movable pulley hoist 4, lifting arm 5, lifting arm support assembly and lifting arm movement drive assembly, movable pulley hoist 4 is hung in the front end of lifting arm 5, lifting arm support assembly includes front side slide sliding block structure and rear side abutting structure, and the front side slide sliding block structure includes the slide 3 of installing on the cover plate of main beam and the sliding block 11 matched with slide 3, installs on the lower surface of lifting arm 5, and the rear side abutting structure includes the abutting track 6 of "7" type, and the rear end upside of lifting arm 5 is slidably abutted on abutting track 6, and lifting arm movement drive assembly includes driving sprocket structure 8, passive sprocket structure 2 and chain 7, and driving sprocket structure 8, passive sprocket structure 2 are separately arranged at the both sides of slide 3, and chain 7 is sleeved on driving sprocket structure 8, passive sprocket structure 2, and lifting arm 5 is fixedly connected with chain 7.

[0018] When the pulley hoist 4 is in lifting motion, various forms of flexible sling can be connected below the pulley hoist 4, the pulley hoist 4 is controlled to lift by the lifting arm 5, when the pulley hoist 4 is in translation motion, the driving of the motor drives the driving sprocket structure 8, the driven sprocket structure 2 and the chain 7 to rotate, thereby driving the lifting arm 5 to translate, that is, the mechanism of driving a closed loop chain by a sprocket is realized, and the pulley hoist 4 stops lifting during the movement.

[0019] In order to make the rear end of the lifting arm 5 slide more smoothly, as an improvement, the lower surface of the horizontal section of the abutting track 6 is provided with an abutting track, and the rear side sliding block 9 is arranged on the upper side of the rear end of the lifting arm 5, and the rear side sliding block 9 abuts on the abutting track.

[0020] In order to effectively prevent the half-round sliding block from falling out of the track in the extreme case of steel wire rope breakage, causing the lifting arm to fall, a groove is arranged at the lower end of the side away from the driving pulley hoist 4 of the sliding track 3, and a safety barb 10 is arranged on the lower surface of the lifting arm 5, and the end of the safety barb 10 extends into the groove.

[0021] As a specific connection mode of the lifting arm 5 and the chain 7, the upper chain passage 13 and the lower chain fixed end 12 on both sides are arranged on the lifting arm 5, the chain 7 passes through the upper chain passage 13, and the two ends are connected to the two lower chain fixed ends 12 after passing around the driving sprocket structure 8 and the driven sprocket structure 2.

[0022] In order to facilitate the sliding of the lifting arm 5 and reduce the sliding resistance, as an improvement, the sliding block 11 is a half-round sliding block, and the sliding track 3 is a half-round sliding track in cross section.

[0023] As a specific connection mode of the components of the lifting driving structure, the driving pulley hoist 4 is hung by a steel wire rope on the fixed pulley set of the lifting arm 5, one end of the steel wire rope is connected with the winch, and the other end is connected with the steel wire rope fixed end 1.

[0024] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model.

Claims

1. A mobile jib hoisting mechanism, characterized by, The lifting device comprises a movable pulley lifting device (4), a lifting arm (5), a lifting arm supporting assembly and a lifting arm moving driving assembly, the movable pulley lifting device (4) is hung at the front end of the lifting arm (5), the lifting arm supporting assembly comprises a front side slide way sliding block structure and a rear side abutting structure, the front side slide way sliding block structure comprises a slide way (3) installed on the cover plate of the main beam and a sliding block (11) matched with the slide way (3) and installed on the lower surface of the lifting arm (5), the rear side abutting structure comprises an abutting rail (6) in the shape of "7", the rear end upper side of the lifting arm (5) slides and abuts on the abutting rail (6), the lifting arm moving driving assembly comprises a driving sprocket structure (8), a driven sprocket structure (2) and a chain (7), the driving sprocket structure (8) and the driven sprocket structure (2) are arranged on the two sides of the slide way (3), and the chain (7) is sleeved on the driving sprocket structure (8) and the driven sprocket structure (2), the lifting arm (5) is fixedly connected with the chain (7).

2. The mobile jib hoist mechanism of claim 1, wherein, The lower surface of the horizontal section of the abutting rail (6) is provided with an abutting rail, and the rear end upper side of the lifting arm (5) is provided with a rear side sliding block (9) which abuts on the abutting rail.

3. The mobile jib hoist of claim 1, wherein, A recess is arranged at the lower end of the side of the slide way (3) away from the movable pulley lifting device (4), and a safety barb (10) is arranged on the lower surface of the lifting arm (5), the end of the safety barb (10) extends into the recess.

4. The mobile jib hoist of claim 1, wherein, An upper chain passage (13) and lower chain fixed ends (12) are arranged on the lifting arm (5), the chain (7) passes through the upper chain passage (13) and is connected to the two lower chain fixed ends (12) after passing around the driving sprocket structure (8) and the driven sprocket structure (2) respectively.

5. The mobile jib hoist of claim 1, wherein, The sliding block (11) is a semicircular sliding block, and the slide way (3) is a semicircular slide way in cross section.

6. The mobile jib hoist of claim 1, wherein, The movable pulley lifting device (4) is hung on the trolley block of the lifting arm (5) through a steel wire rope, one end of the steel wire rope is connected with a winch, and the other end is connected with a steel wire rope fixed end (1).

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