CN111824972B

CN111824972B - Crane with a movable crane

Info

Publication number: CN111824972B
Application number: CN202010474428.5A
Authority: CN
Inventors: 王进峰; 郑京凤; 江辉
Original assignee: Wuhan Marine Machinery Plant Co Ltd
Current assignee: Wuhan Marine Machinery Plant Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2023-04-07
Anticipated expiration: 2040-05-29
Also published as: CN111824972A

Abstract

The disclosure provides a crane, and belongs to the field of crane equipment. The hoist includes the main part subassembly, the hook component, the counter weight subassembly, the main part subassembly includes the foundation pillar, rotate the post, davit and driving rope, the hook component includes lifting hook and first rope, the counter weight subassembly includes first pulley, the second rope and the counterweight frame that is used for shelving the balancing weight, first pulley is located the top of rotating the post, and first pulley protrusion in the periphery wall of rotating the post, the first end of second rope links together with the top of davit, the second end of second rope passes first pulley and links together with the counterweight frame, the counterweight frame is located the outer wall of rotating the post along rotating post axial slidable. The crane provided by the disclosure can be used for offsetting the weight of the suspension arm by placing the balancing weight on the counterweight frame, so that the suspension arm can be used for adjusting the inclination angle with less energy consumption during pitching motion.

Description

Crane with a movable crane

Technical Field

The disclosure belongs to the field of crane equipment, and particularly relates to a crane.

Background

The crane is a common device used in production places such as workshops, ports and construction sites, and is used for lifting heavy objects, so that the purpose of conveying is achieved.

When different heavy objects are conveyed, the inclination angle of the suspension arm needs to be adjusted, namely, the suspension arm is controlled to perform pitching motion. In the related art, the pitching motion of the boom is usually realized by providing a high-power motor, a reducer, a cooler, and the like.

However, the above method for implementing the boom pitching motion can greatly increase the energy consumption of the crane, thereby causing the production cost of the crane to be greatly increased.

Disclosure of Invention

The embodiment of the disclosure provides a crane, which can offset the weight of a suspension arm by placing a balancing weight on a counterweight frame, so that the suspension arm can complete the adjustment of an inclination angle with less energy consumption during pitching motion. The technical scheme is as follows:

the embodiment of the disclosure provides a crane, which comprises a main body component, a lifting hook component and a counterweight component;

the main body assembly comprises a foundation column, a rotating column, a suspension arm and a driving rope, the bottom end of the rotating column is rotatably and coaxially positioned on the top end of the foundation column, the bottom end of the suspension arm is hinged on the rotating column, the first end of the driving rope is connected with a driving rope winch on the rotating column, and the second end of the driving rope is connected with the top end of the suspension arm;

the lifting hook assembly comprises a lifting hook and a first rope, wherein the first end of the first rope is connected with the rope winch on the rotating column, and the second end of the first rope penetrates through the top end of the lifting arm to be connected with the lifting hook;

the counterweight assembly comprises a first pulley, a second rope and a counterweight frame for placing a counterweight, the first pulley is located at the top end of the rotating column, the first pulley protrudes out of the outer peripheral wall of the rotating column, the first end of the second rope is connected with the top end of the suspension arm, the second end of the second rope penetrates through the first pulley and is connected with the counterweight frame, and the counterweight frame is located on the outer wall of the rotating column in an axially slidable mode along the rotating column.

Optionally, the weight rack comprises a guide plate and a weight plate for resting the weight block, the guide plate and the weight plate are perpendicular and connected together, the guide plate is movably mounted on the rotating column, and the second end of the second rope is connected with the top of the guide plate.

Optionally, the guide plate has a guide wheel on its outer edge, and the rotating column has a guide rail on its outer wall, the guide wheel being in rolling engagement with the guide rail.

Optionally, the weight plate is provided with an insertion rod for inserting the weight block, the insertion rod is perpendicular to the weight plate and located in the middle of the weight plate, and a locking member for locking the weight block is arranged at the top end of the insertion rod.

Optionally, the locking member includes a ring threadedly fitted on the plunger and a plurality of handles circumferentially spaced along an outer wall of the ring.

Optionally, the weight rack further comprises a connecting rod, one end of the connecting rod is connected with the middle part of the guide plate, and the other end of the connecting rod is connected with the middle part of the weight plate.

Optionally, the counterweight assembly further comprises a second sheave located on the boom near the top end, the first end of the second rope being connected to the second sheave.

Optionally, the top of the weight rack has a connection rack on which the second end of the second rope is located.

Optionally, the rotating column has a third pulley thereon, and the first end of the first rope is connected with the rope winch of the rotating column through the third pulley.

Optionally, the rotating column is provided with a fourth pulley, and the first end of the driving rope passes through the fourth pulley and is connected with the driving rope winch on the rotating column.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

for the crane provided by the embodiment of the disclosure, the first end of the first rope is connected with the rope winch of the rotating column, and the second end of the first rope passes through the top end of the boom and is connected with the hook, so that the first rope can be wound and unwound by the rope winch on the rotating column to realize the lifting motion of the weight. And the bottom of the rotating column is rotatably and coaxially positioned on the top end of the base column, and the bottom end of the suspension arm is hinged on the rotating column, so that the suspension arm is rotated by rotating the rotating column, and further, the heavy object is conveyed. In addition, the first end of the driving rope is connected with the driving rope winch on the rotating column, the second end of the driving rope is connected with the top end of the suspension arm, the driving rope can be wound and unwound through the driving rope winch on the rotating column, and therefore the inclination angle of the suspension arm can be adjusted.

Furthermore, the first pulley is located at the top end of the rotating column and protrudes out of the rotating column, the first end of the second rope is connected with the top end of the suspension arm, the second end of the second rope penetrates through the first pulley and is connected with the counterweight frame, and the counterweight frame is located on the outer wall of the rotating column in an axial sliding mode along the rotating column. Then, when the inclination angle of the suspension arm needs to be changed, the change of the inclination angle of the suspension arm can be assisted by utilizing the self gravity of the balancing weight on the counterweight frame, so that the rotation of the suspension arm is more labor-saving, the driving rope winch consumes less energy to adjust the inclination angle of the suspension arm, and the energy consumption is greatly reduced.

That is to say, through the hoist that this disclosure provided, can lay the balancing weight on the counter weight frame to can offset the weight of some davit, make the davit provide less energy consumption just can accomplish the adjustment of inclination when the luffing motion, and then greatly reduced the manufacturing cost of hoist.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a crane provided in an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a weight rack provided in an embodiment of the present disclosure.

The symbols in the drawings represent the following meanings:

1. a body assembly; 11. a base pillar; 12. rotating the column; 121. a guide rail; 1211. a rail body; 1222. a fulcrum group; 1223. a fulcrum; 122. a third pulley; 123. a fourth pulley; 124. a first bracket; 125. a second bracket; 126. a third support; 127. a rotating shaft; 13. a suspension arm; 131. a fifth pulley; 132. a sixth pulley; 14. a drive rope;

2. a hook assembly; 21. a hook; 22. a first rope;

3. a counterweight assembly; 31. a first pulley; 32. a second rope; 33. a counterweight frame; 331. a guide plate; 3311. a guide wheel; 3312. a guide wheel frame; 332. a weight plate; 3321. inserting a rod; 3322. a locking member; 3323. a circular ring; 3324. a handle; 3325. a connecting frame; 333. a connecting rod; 34. a second pulley;

100. a counterweight block; 200. and (4) a slewing bearing.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a crane provided in an embodiment of the present disclosure, and as shown in fig. 1, the crane includes a main body assembly 1, a hook assembly 2, and a counterweight assembly 3.

The main body component 1 comprises a base column 11, a rotating column 12, a suspension arm 13 and a driving rope 14, wherein the bottom end of the rotating column 12 is rotatably and coaxially positioned on the top end of the base column 11, the bottom end of the suspension arm 13 is hinged on the rotating column 12, the first end of the driving rope 14 is connected with a driving rope winch on the rotating column 12, and the second end of the driving rope 14 is connected with the top end of the suspension arm 13.

The hook assembly 2 comprises a hook 21 and a first rope 22, the first end of the first rope 22 being connected to the rope winch on the column 12, and the second end of the first rope 22 being connected to the hook 21 through the top end of the boom 13.

The counterweight assembly 3 comprises a first pulley 31, a second rope 32 and a counterweight bracket 33 for placing the counterweight 100, the first pulley 31 is positioned at the top end of the rotating column 12, the first pulley 31 protrudes out of the peripheral wall of the rotating column 12, the first end of the second rope 32 is connected with the top end of the suspension arm 13, the second end of the second rope 32 passes through the first pulley 31 and is connected with the counterweight bracket 33, and the counterweight bracket 33 is slidably positioned on the outer wall of the rotating column 12 along the axial direction of the rotating column 12.

With the crane provided by the embodiment of the present disclosure, the first end of the first rope 22 is connected to the rope winch of the rotating column 12, and the second end of the first rope 22 is connected to the hook 21 through the top end of the boom 13, so that the first rope 22 can be wound and unwound by the rope winch on the rotating column 12 to realize the lifting and lowering movement of the weight. And the bottom end of the rotating column 12 is rotatably and coaxially positioned on the top end of the base column 11, and the bottom end of the suspension arm 13 is hinged on the rotating column 12, so that the rotation of the suspension arm 13 is realized by rotating the rotating column 12, and further, the conveying of heavy objects is realized. In addition, the first end of the driving rope 14 is connected with the driving rope winch on the rotating column 12, the second end of the driving rope 14 is connected with the top end of the suspension arm 13, the driving rope 14 can be retracted and extended through the driving rope winch on the rotating column 12, and therefore the inclination angle of the suspension arm 13 can be adjusted.

Further, a first pulley 31 is disposed at the top end of the rotating column 12 and protrudes from the rotating column 12, a first end of a second rope 32 is connected to the top end of the boom 13, a second end of the second rope 32 is connected to a weight holder 33 through the first pulley 31, and the weight holder 33 is slidably disposed on the outer wall of the rotating column 12 along the axial direction of the rotating column 12. Then, when the inclination angle of the boom 13 needs to be changed, the change of the inclination angle of the boom 13 can be assisted by the self gravity of the counterweight 100 on the counterweight bracket 33, so that the rotation of the boom 13 is more labor-saving, the drive rope winch consumes less energy to adjust the inclination angle of the boom 13, and the energy consumption is greatly reduced.

That is to say, with the crane provided by the present disclosure, the counterweight 100 can be placed on the counterweight frame 33, so that part of the weight of the boom 13 can be offset, and the adjustment of the inclination angle can be completed with less energy consumption provided by the boom 13 during the pitching motion, thereby greatly reducing the production cost of the crane.

It should be noted that the drive rope winch and the rope winch are both located inside the rotating column 12 (not shown).

It should be noted that the foundation column 11 may be inserted into a pile fastening at a production site, and the crane is installed by the pile fastening. In other embodiments of the present disclosure, the foundation column 11 may also be located on a chassis of a truck, and the position of the crane is moved by the truck, so that the method is suitable for different production sites, and the use efficiency can be effectively improved.

Illustratively, the rotating column 12 has a first bracket 124 thereon, and the first pulley 31 is located on the first bracket 124.

In this way, the mounting of the first pulley 31 on the rotary column 12 is facilitated.

It should be noted that the second rope 32 is slidably inserted into the first pulley 31, and both ends of the second rope are connected to the weight frame 33 and the boom 13, respectively.

With continued reference to fig. 1, counterweight assembly 3 also includes a second sheave 34, second sheave 34 being located on boom 13 near the top end, and a first end of a second rope 32 being connected to second sheave 34.

In the above embodiment, the second pulley 34 functions as a movable pulley on the boom 13, on the one hand, to facilitate the connection of the second rope 32 to the boom 13, and on the other hand, to use the movable pulley to save more effort, thereby facilitating the pitching motion of the boom 13.

In this embodiment, each of the first pulley 31 and the second pulley 34 includes a plurality of pulley bodies, that is, the second rope 32 sequentially passes through the pulley bodies of the first pulley 31 and the second pulley 34 to pass back and forth, and finally is connected to one pulley body of the second pulley 34, and the plurality of pulley bodies of the second pulley 34 function as a movable pulley, so that the labor can be effectively saved.

That is, the first end of the second rope 32 is slidably inserted through a pulley body of the first pulley 31, a pulley body of the second pulley 34, another pulley body of the first pulley 31, another pulley body of the second pulley 34, and so on, in sequence, and the second rope 32 is used in cooperation with the pulley bodies of the first pulley 31 and the second pulley 34, so that labor can be effectively saved.

Optionally, the top of the weight rack 33 has a connection bracket 3325, and the second end of the second rope 32 is located on the connection bracket 3325.

In the above embodiment, the connection bracket 3325 facilitates connection and fixation of the second rope 32 and the weight bracket 33.

In this example, the connecting bracket 3325 may be a U-shaped structural member, both vertical bars of the connecting bracket 3325 extend in the axial direction of the rotating post 12, and the second end of the second rope 32 is located on the cross bar of the connecting bracket 3325 (see fig. 2).

Optionally, the rotating column 12 has a third pulley 122 thereon, and the first end of the first rope 22 is connected to the rope winch of the rotating column 12 through the third pulley 122.

In the above embodiment, the third pulley 122 has a guiding and friction reducing effect on the first rope 22, so that the first rope 22 is connected with the rope winch of the rotating column 12.

Illustratively, the top end of the boom 13 has a fifth pulley 131, and the second end of the first rope 22 passes through the fifth pulley 131 to be connected with the hook 21, so that the friction force between the first rope 22 and the boom 13 can be reduced.

Illustratively, the rotating column 12 has a second bracket 125 disposed thereon, and the third pulley 122 is disposed on the second bracket 125.

Illustratively, the weight is hooked on the hook 21, and when the rope winch of the rotating column 12 is driven by the motor to rotate forward, recovery of the first rope 22 is achieved, i.e., the hook 21 is moved upward, thereby driving the weight upward. Similarly, when the rope winch of the rotary column 12 is driven by the motor to rotate in reverse, the release of the first rope 22 is thereby effected, i.e. the hook 21 is caused to move downwards, thereby driving the weight downwards.

Optionally, the rotating column 12 has a fourth pulley 123 thereon, and the first end of the driving rope 14 passes through the fourth pulley 123 to connect with the driving rope winch on the rotating column 12.

In the above embodiment, the fourth pulley 123 has a guiding and friction reducing effect on the driving rope 14, so that the driving rope 14 can be connected with the driving rope winch of the rotary column 12.

Illustratively, the top end of the boom 13 has a sixth pulley 132, the fourth pulley 123 and the sixth pulley 132 each include a plurality of pulley bodies, and the driving rope 14 passes through the pulley bodies passing back and forth through the fourth pulley 123 and the sixth pulley 132 in sequence, wherein the sixth pulley 132 functions as a movable pulley, so that the labor can be effectively saved.

That is, the second end of the driving rope 14 is slidably inserted through a pulley body of the fourth pulley 123, a pulley body of the sixth pulley 132, another pulley body of the fourth pulley 123, another pulley body of the sixth pulley 132, and so on, and the driving rope 14 is used by matching the pulley bodies of the fourth pulley 123 and the sixth pulley 132, so that the labor can be effectively saved.

Illustratively, the rotating column 12 is provided with a third bracket 126, and the plurality of pulley bodies of the fourth pulley 123 are arranged on the third bracket 126 at intervals.

Illustratively, for the boom 13 to perform the pitching motion, when the driving rope winch of the rotation column 12 is driven by the motor to rotate forward, the recovery of the driving rope 14 is realized, that is, the boom 13 is rotated counterclockwise, so that the inclination angle of the boom 13 in the vertical direction is reduced. Likewise, when the drive rope winch of the rotary column 12 is driven by the motor to rotate in reverse, the release of the drive rope 14 is thereby effected, i.e. the boom 13 is caused to rotate clockwise, so that the inclination of the boom 13 in the vertical direction is increased.

The structure of the weight holder 33 is described below:

fig. 2 is a schematic structural view of the weight rack provided by the embodiment of the present disclosure, and as shown in fig. 2, the weight rack 33 includes a guide plate 331 and a weight plate 332 for resting the weight block 100, the guide plate 331 and the weight plate 332 are perpendicular and connected together, the guide plate 331 is movably mounted on the rotating column 12, and the second end of the second rope 32 is connected with the top of the guide plate 331.

In the above embodiment, the guide plate 331 plays a role of guiding during the up and down movement of the weight holder 33, and the weight plate 332 is used for arranging various weights 100.

It should be noted that, at different inclination angles of the suspension arm 13, the arm of force of the suspension arm 13 is different, so that the required weights 100 have different qualities, and the suspension arms 13 of different models have different weights, so that the required weights 100 have different qualities.

Therefore, in the present embodiment, different counterweights 100 or a plurality of counterweights 100 can be placed on the counterweight plate 332, so that the counterweights 100 can be adapted to different tilt angles of different models of suspension arms 13 and the same model of suspension arm 13.

In this embodiment, opposite sides of the guide plate 331 and the weight plate 332 are welded together.

In the above embodiment, the welded connection may increase the connection strength of the guide plate 331 and the weight plate 332, thereby increasing the service life.

Illustratively, the guide plate 331 and the weight plate 332 may be a composite steel plate.

Alternatively, the guide plate 331 has a guide wheel 3311 on an outer edge thereof, and the rotation column 12 has a guide rail 121 on an outer wall thereof, the guide wheel 3311 being in rolling engagement with the guide rail 121.

In the above embodiment, the guide wheel 3311 and the guide rail 121 are engaged with each other, so that the friction force applied to the guide plate 331 during the sliding process can be reduced, the acting force of the counterweight 100 on the boom 13 can be increased, and the energy consumed by the boom 13 in the pitching motion can be reduced.

Illustratively, the guide plate 331 has a guide wheel frame 3312 on an outer edge thereof, and the guide wheel 3311 is located on the guide wheel frame 3312.

In the above embodiment, the guide wheel holder 3312 functions to connect the guide plate 331 and the guide wheel 3311, facilitating the rolling of the guide wheel 3311.

Illustratively, the guide plate 331 is a square structure, and two guide wheels 3311 are disposed at an interval on left and right sides of the guide plate 331, respectively, so that a smooth sliding of the guide plate 331 can be effectively ensured by the 4 guide wheels 3311. In other embodiments of the present disclosure, the number of guide wheels 3311 may be 8, which is not limited by the present disclosure.

In the present embodiment, the guide rail 121 includes two rail bodies 1211 and two fulcrum shaft sets 1222 (see fig. 1), the two rail bodies 1211 are arranged in parallel and spaced apart, and each of the two fulcrum shaft sets 1222 extends along the axis of the rotation column 12, for any one of the fulcrum shaft sets 1222, the fulcrum shaft sets 1222 includes two fulcrum shafts 1223, one end of each of the two fulcrum shafts 1223 is arranged perpendicular to the axis of the rotation column 12, the other end of one fulcrum shaft 1223 is connected to one side of one rail body 1211, and the other end of the other fulcrum shaft 1223 is connected to the other side of one rail body 1211, so that the rail bodies 1211 and the rotation column 12 are arranged in spaced apart, and the problem that the guide plate 331 contacts the rotation column 12 during sliding to increase friction force is avoided.

Illustratively, the rail body 1211 and fulcrum 1223 are bolted together.

In the above embodiment, the bolt connection facilitates the removal and installation of the rail body 1211, thereby facilitating the maintenance and replacement of the rail body 1211.

Optionally, the weight plate 332 is provided with an inserting rod 3321 for inserting the counterweight 100, the inserting rod 3321 is perpendicular to the weight plate 332, the inserting rod 3321 is positioned in the middle of the weight plate 332, and the top end of the inserting rod 3321 is provided with a locking piece 3322 for locking the counterweight 100.

In the above embodiment, the weight 100 may be sleeved on the insert rod 3321, so as to prevent the weight 100 from separating from the weight plate 332 during the up-and-down movement. The locking member 3322 has a locking effect on the weight 100 in the axial direction of the insertion rod 3321.

For example, a plurality of weights 100 can be inserted on the inserting rod 3321, so that the total weight of the weights 100 can be adjusted to adapt to different types of booms 13 and different inclination angles of the same type of boom 13.

It should be noted that each balancing weight 100 is provided with a through hole having an outer diameter equal to that of the insertion rod 3321, so that the balancing weight 100 can be stably sleeved on the insertion rod 3321.

In the present embodiment, the insert shaft 3321 and the weight plate 332 are welded together, thereby increasing the connection strength therebetween.

With continued reference to FIG. 2, the locking member 3322 includes a ring 3323 and a plurality of knobs 3324, the ring 3323 being threadably mounted on the plunger 3321, the plurality of knobs 3324 being circumferentially spaced about an outer wall of the ring 3323.

In the above embodiment, the ring 3323 is screwed on the insert rod 3321 to limit the weight 100, and the handle 3324 is convenient to adjust the axial position of the ring 3323 on the insert rod 3321.

Illustratively, when the counterweight 100 needs to be replaced, the handle 3324 is driven to rotate around the insertion rod 3321 by external force until the circular ring 3323 is disengaged from the top of the insertion rod 3321. The old weight 100 is then removed from the top of the insert rod 3321 and a new weight 100 is placed on the insert rod 3321. Finally, the ring 3323 is sleeved on the top of the inserting rod 3321, and the handle 3324 is driven to rotate until the bottom of the ring 3323 abuts against the new counterweight 100, so that the new counterweight 100 is firmly clamped between the counterweight plate 332 and the ring 3323.

Illustratively, the number of handles 3324 is 4, and 4 handles 3324 are arranged in a cross-shape, thereby facilitating actuation of ring 3323 at different angles. In other embodiments of the present disclosure, the number of handles 3324 may also be 6 or 8, which is not limited by the present disclosure.

It should be noted that the handle 3324 can also be used with a wrench, so as to extend the length of the handle 3324, increase the force arm for rotating the ring 3323, and further save labor.

Optionally, the weight rest 33 further includes a connecting rod 333, one end of the connecting rod 333 is connected to the middle portion of the guide plate 331, and the other end of the connecting rod 333 is connected to the middle portion of the weight plate 332.

In the above embodiment, the connecting rod 333 serves to connect the guide plate 331 and the weight plate 332, thereby avoiding the problem that the weight plate 332 is deformed or broken due to an excessive mass of the weight 100.

Illustratively, one connecting rod 333 is disposed on each of the left and right sides of the guide plate 331, thereby further increasing the coupling strength of the guide plate 331 and the weight plate 332. In addition, the connecting rod 333 can be a high-strength composite steel shaft, thereby effectively improving the structural strength of itself and ensuring the safety performance of the counterweight frame 33.

Referring again to fig. 1, the base post 11 and the rotating post 12 are connected together by a slewing bearing 200.

In the above embodiment, the slewing bearing 200 facilitates the rotation of the rotary column 12 on the base column 11, and can effectively reduce the friction force received when the rotary column 12 rotates.

Illustratively, the bottom end of the rotary column 12 is connected to the outer ring of the slewing bearing 200, and the top end of the base column 11 is connected to the inner ring of the slewing bearing 200.

Illustratively, a rotating shaft 127 is inserted on the outer peripheral wall of the bottom end of the rotating column 12, and the bottom end of the suspension arm 13 is sleeved on the rotating shaft 127.

In the above embodiment, the rotation shaft 127 facilitates the rotation of the boom 13, thereby reducing the friction force to which the boom 13 is subjected during the pitching motion.

The working principle of the crane provided by the present disclosure is briefly explained as follows:

a first end of the first rope 22 is connected to the rope winch of the rotating column 12, and a second end of the first rope 22 is connected to the hook 21 through the top end of the boom 13, so that the first rope 22 can be reeled and paid off by the rope winch of the rotating column 12 to perform the lifting motion of the weight. And the bottom end of the rotating column 12 is rotatably and coaxially positioned on the top end of the base column 11, and the bottom end of the suspension arm 13 is hinged on the rotating column 12, so that the rotation of the suspension arm 13 is realized by rotating the rotating column 12, and further, the conveying of heavy objects is realized. In addition, the first end of the driving rope 14 is connected with the driving rope winch on the rotating column 12, the second end of the driving rope 14 is connected with the top end of the suspension arm 13, the driving rope 14 can be retracted and extended through the driving rope winch on the rotating column 12, and therefore the inclination angle of the suspension arm 13 can be adjusted.

Further, a first pulley 31 is disposed at the top end of the rotating column 12 and protrudes from the rotating column 12, a first end of a second rope 32 is connected with the top end of the boom 13, a second end of the second rope 32 passes through the first pulley 31 and is connected with a weight bracket 33, and the weight bracket 33 is slidably disposed on the outer wall of the rotating column 12 along the axial direction of the rotating column 12. Then, when the inclination angle of the boom 13 needs to be changed, the change of the inclination angle of the boom 13 can be assisted by the self gravity of the counterweight 100 on the counterweight bracket 33, so that the rotation of the boom 13 is more labor-saving, the drive rope winch consumes less energy to adjust the inclination angle of the boom 13, and the energy consumption is greatly reduced.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A crane, characterized in that the crane comprises a main body component (1), a hook component (2) and a counterweight component (3);

the main body assembly (1) comprises a base column (11), a rotating column (12), a suspension arm (13) and a driving rope (14), the bottom end of the rotating column (12) is rotatably and coaxially positioned on the top end of the base column (11), the bottom end of the suspension arm (13) is hinged on the rotating column (12), the first end of the driving rope (14) is connected with a driving rope winch on the rotating column (12), and the second end of the driving rope (14) is connected with the top end of the suspension arm (13);

the lifting hook assembly (2) comprises a lifting hook (21) and a first rope (22), wherein the first end of the first rope (22) is connected with a rope winch on the rotating column (12), and the second end of the first rope (22) penetrates through the top end of the lifting arm (13) to be connected with the lifting hook (21);

the weight assembly (3) comprises a first pulley (31), a second rope (32) and a weight frame (33) for placing a weight (100), the first pulley (31) is positioned at the top end of the rotating column (12), the first pulley (31) protrudes out of the outer peripheral wall of the rotating column (12), a first end of the second rope (32) is connected with the top end of the boom (13), a second end of the second rope (32) passes through the first pulley (31) and is connected with the weight frame (33), the weight frame (33) is axially and slidably positioned on the outer wall of the rotating column (12) along the rotating column (12), the weight frame (33) comprises a guide plate (331) and a weight plate (332) for placing the weight (100), the guide plate (331) and the weight plate (332) are perpendicular and connected together, the guide plate (331) is movably mounted on the rotating column (12), and a second end of the second rope (32) is connected with the top of the guide plate (331);

the outer edge of the guide plate (331) is provided with a guide wheel frame (3312), the guide wheel frame (3312) is provided with a guide wheel (3311), the outer wall of the rotating column (12) is provided with a guide rail (121), and the guide wheel (3311) is matched with the guide rail (121) in a rolling way;

the guide rail (121) comprises two rail bodies (1211) and two fulcrum groups (1222), the two rail bodies (1211) are arranged in parallel at intervals and extend along the axis of the rotating column (12), for any one group of fulcrum groups (1222), each fulcrum group (1222) comprises two fulcrum shafts (1223), one ends of the two fulcrum shafts (1223) are arranged perpendicular to the axis of the rotating column (12), the other end of one fulcrum shaft (1223) is connected with one side of one rail body (1211), and the other end of the other fulcrum shaft (1223) is connected with the other side of one rail body (1211).

2. The crane according to claim 1, wherein the weight plate (332) is provided with an insert rod (3321) for inserting the counterweight (100), the insert rod (3321) is perpendicular to the weight plate (332), the insert rod (3321) is positioned in the middle of the weight plate (332), and the top end of the insert rod (3321) is provided with a locking member (3322) for locking the counterweight (100).

3. The crane of claim 2, wherein the locking member (3322) comprises a ring (3323) and a plurality of handles (3324), the ring (3323) being threadably mounted on the plunger (3321), the plurality of handles (3324) being circumferentially spaced along an outer wall of the ring (3323).

4. A crane according to claim 1, wherein the weight rack (33) further comprises a connecting rod (333), one end of the connecting rod (333) is connected to a middle portion of the guide plate (331), and the other end of the connecting rod (333) is connected to a middle portion of the weight plate (332).

5. A crane according to any one of claims 1-4, characterized in that the counterweight assembly (3) further comprises a second pulley (34), which second pulley (34) is located on the boom (13) near the top end, and that the first end of the second rope (32) is connected to the second pulley (34).

6. A crane according to any one of claims 1-4, characterized in that the top of the weight rack (33) has a connection bracket (3325), and the second end of the second rope (32) is located on the connection bracket (3325).

7. A crane according to any one of claims 1-4, characterized in that the rotating column (12) is provided with a third pulley (122), through which third pulley (122) the first end of the first rope (22) is connected to the rope winch of the rotating column (12).

8. A crane according to any one of claims 1-4, characterized in that the column (12) is provided with a fourth pulley (123), through which fourth pulley (123) the first end of the drive line (14) is connected to the drive line winch on the column (12).