Crane

Abstract

The utility model relates to the technical field of hoisting equipment, and discloses a crane which comprises a portal frame, a rotating platform is arranged on the portal frame, an arm frame and a position adjusting driving device are arranged on the rotating platform, one end of the arm frame is hinged with the rotating platform, the other end of the arm frame is connected with a lifting appliance in a hanging mode through a lifting steel wire rope, and the arm frame is further provided with a first adjusting pulley. The first adjusting pulley is located between the rotating platform and the lifting appliance, the position adjusting driving device is connected with an adjusting steel wire rope, and the adjusting steel wire rope bypasses the first adjusting pulley to be connected with the lifting appliance. The scaling length of the steel wire rope is controlled and adjusted through the position adjusting driving device, so that the position of the lifting appliance is finely adjusted, the lifting appliance can move to a designated position, the operation difficulty of technicians is reduced, and the loading and unloading operation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a crane. Background Technology

[0002] Gantry cranes have a large lifting height and working radius, which can meet the requirements of mechanized loading, unloading, and transshipment of construction sites, factory workshops, drilling platforms, hydropower stations, ports, docks, ships and vehicles, as well as the requirements of making full use of the site, and have become commonly used loading and unloading equipment. The currently disclosed gantry crane includes a gantry, a turntable mounted on the gantry, a machine room, an A-frame, and a boom. One end of the boom is movably mounted on the turntable via a pin. A lifting motor and a luffing motor are respectively installed in the machine room. The lifting motor and the luffing motor are connected to the lifting wire rope drum and the luffing wire rope drum, respectively. One end of the lifting wire rope is wound on the lifting wire rope drum. The middle part of the lifting wire rope passes over the A-frame lifting pulley block located at the top of the A-frame and the boom head lifting pulley block located at the other end of the boom. The other end of the lifting wire rope is fixed to the other end of the boom. The hook is mounted on the lifting wire rope via the hook pulley block. One end of the luffing wire rope is wound on the luffing wire rope drum. The middle part of the luffing wire rope passes over the A-frame luffing pulley block located at the top of the A-frame and the boom head luffing pulley block located at the other end of the boom. The other end of the luffing wire rope is fixed in the machine room. The luffing motor drives the luffing wire rope drum to rotate, thus expanding and contracting the luffing wire rope. This causes one end of the boom to rotate around the pin, enabling the other end of the boom to move up and down, achieving a certain degree of change in lifting radius to lift heavy objects. However, during the lifting process, when the distance between the hook and the object to be lifted is small, due to the large size of the boom, the luffing adjustment accuracy of the boom is limited. The operator needs to repeatedly adjust the rotation angle of the boom to adjust the position of the hook so that the hook is aligned with the object to be lifted so that the hook can grab the object. This has the disadvantages of high operation difficulty and low work efficiency. Utility Model Content

[0003] To solve the above technical problems, this utility model provides a crane that can conveniently and accurately adjust the position of the lifting device.

[0004] To achieve the above objectives, this utility model provides a crane, including a gantry frame, a rotating platform, a boom, and a position adjustment drive device. One end of the boom is hinged to the rotating platform, and the other end of the boom is suspended and connected to a lifting device via a lifting wire rope. The boom is also provided with a first adjusting pulley, which is located between the rotating platform and the lifting device. The position adjustment drive device is connected to an adjusting wire rope, which passes around the first adjusting pulley and is connected to the lifting device.

[0005] Furthermore, the first adjusting pulley is located in the middle of the bottom side of the boom, and the lifting wire rope passes around the top side of the boom.

[0006] Furthermore, the bottom side of the boom is provided with a first hanging hole, and the first adjusting pulley is connected to the first hanging hole through a first hook.

[0007] Furthermore, the position adjustment drive device includes an adjustment drum disposed on the rotating platform and a position adjustment driver for driving the adjustment drum to rotate. The rotating platform is provided with a second adjustment pulley. The adjustment wire rope is wound around the adjustment drum and passes through the second adjustment pulley and the first adjustment pulley in sequence before being connected to the lifting device.

[0008] Furthermore, the rotating platform is provided with a second hanging hole, and the second adjusting pulley is connected to the second hanging hole through a second hook.

[0009] Furthermore, it also includes a luffing mechanism for driving the boom to rotate relative to the rotating platform, and a column disposed on the rotating platform. The luffing mechanism includes a luffing drum disposed on the rotating platform, a luffing driver for driving the luffing drum to rotate, a first luffing pulley disposed on the column, a second luffing pulley disposed at the other end of the boom, and a luffing wire rope. One end of the luffing wire rope is wound around the luffing drum and passes sequentially around the first luffing pulley and the second luffing pulley. The other end of the luffing wire rope is fixed to the rotating platform or the column.

[0010] Furthermore, the rotating platform is provided with a column, a lifting drive, and a lifting drum connected to the lifting drive. The column is provided with a first lifting pulley, and the other end of the boom is provided with a second lifting pulley. One end of the lifting wire rope is wound around the lifting drum and passes through the first lifting pulley and the second lifting pulley in sequence before connecting to the lifting device.

[0011] Furthermore, windproof cables are provided on both sides of the bottom of the gantry.

[0012] Furthermore, the lifting device is a hook, ring, beam, grab, clamp, lifting clamp, or suction cup.

[0013] Furthermore, a traveling mechanism is provided at the bottom of the gantry.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] One end of the boom is hinged to the rotating platform, and the other end is suspended from the lifting device via a lifting wire rope. The boom is also equipped with a first adjusting pulley located between the rotating platform and the lifting device. A position adjustment drive device is connected to an adjusting wire rope, which passes around the first adjusting pulley and connects to the lifting device. By controlling the extension and retraction of the adjusting wire rope through the position adjustment drive device, the position of the lifting device can be finely adjusted, allowing it to be moved to a designated location. This reduces the operational difficulty for technicians and improves the efficiency of loading and unloading operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the crane according to an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 Enlarged structural diagram of Part A;

[0018] Figure 3 for Figure 1 Enlarged structural diagram of Part B;

[0019] Figure 4 This is a schematic diagram of the gantry, traveling mechanism, and windproof cable according to an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the computer room according to an embodiment of the present utility model.

[0021] In the attached diagram: gantry 1; windproof cable 11; traveling mechanism 12; rotating platform 2; column 21; second hook 22; second connector 23; boom 3; first adjusting pulley 31; first hook 32; first connector 33; position adjustment drive device 4; adjusting drum 41; adjusting driver 42; second adjusting pulley 43; adjusting wire rope 44; lifting wire rope 51; lifting device 52; lifting driver 53; lifting drum 54; first lifting pulley 55; second lifting pulley 56; machine room 6; luffing mechanism 7; luffing drum 71; luffing driver 72; first luffing pulley 73; second luffing pulley 74; luffing wire rope 75; rotating mechanism 8; electrical control system 9. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In this document, terms such as "upper," "lower," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection. Moreover, relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0024] like Figure 1-5 As shown, the crane includes a gantry 1, a rotating platform 2, a boom 3, and a position adjustment drive device 4. The rotating platform 2 also includes a machine room 61, where at least a portion of the luffing mechanism 7 is located. One end of the boom 3 is hinged to the rotating platform 2 via a pin, and the other end is suspended from a lifting wire rope 51 and connected to a lifting device 52. The boom 3 also has a first adjusting pulley 31 located between the rotating platform 2 and the lifting device 52. The position adjustment drive device 4 is connected to an adjusting wire rope 44, which passes around the first adjusting pulley 31 and connects to the lifting device 52. By controlling the scaling length of the adjusting wire rope 44 through the position adjustment drive device 41, the position of the lifting device 52 relative to the gantry 1 can be finely adjusted. This allows the lifting device 52 to move quickly and accurately to a designated loading position to lift the goods to be transported, or to move the goods to be lowered to a designated unloading position, reducing the operational difficulty for technicians and improving loading and unloading efficiency.

[0025] like Figure 1 As shown, boom 3 can be a single frame; in other embodiments, boom 3 can be a four-bar linkage structure. Lifting device 52 can be a hook, ring, beam, grab, clamp, lifting clamp, suction cup, etc. The specific structure of lifting device 52 is selected according to the type of goods to be lifted, and it only needs to be compatible with the goods to be lifted; its specific structure is not limited to the examples above.

[0026] like Figure 1-2As shown, preferably, the first adjusting pulley 31 is located at the middle of the bottom side of the boom 3, and the lifting wire rope 51 passes around the top side of the boom 3. The lifting wire rope 51 and the adjusting wire rope 44 are located on both sides of the boom 3, and their scaling movements do not interfere with each other, which helps to prevent the wire ropes from getting tangled. In other embodiments, the first adjusting pulley 31 can be located on the bottom side of the boom 3 closer to the lifting device 52 or the rotating platform 2. Preferably, the bottom side of the boom 3 is provided with a first hanging hole, and the first adjusting pulley 31 is movably connected to the first hanging hole through a first hook 32. Specifically, the bottom side of the boom 3 is provided with a first connecting member 33, and the first connecting member 33 is provided with a first hanging hole. The first adjusting pulley 31 can rotate relative to the first connecting member 33 to adapt to the angle changes of the adjusting wire rope 44 during the lifting and lowering process, so that the adjusting wire rope 44 moves more smoothly. Preferably, the first hook 32 is provided with a safety buckle 321 to prevent the first hook 32 from disengaging from the first hanging hole during operation, thus avoiding the separation of the first adjusting pulley 31 from the boom 3.

[0027] like Figure 1-2 As shown in Figure 5, the position adjustment drive device 4 includes an adjustment drum 41 located on the rotating platform 2 and an adjustment driver 42 that drives the adjustment drum 41 to rotate. The position adjustment drive device 4 is located in the machine room 61. The rotating platform 2 is equipped with a second adjustment pulley 43. The adjustment wire rope 44 is wound around the adjustment drum 41 and passes through the second adjustment pulley 43 and the first adjustment pulley 31 in sequence before connecting to the lifting device 52. By driving the adjustment drum 41 to rotate through the position adjustment drive device 41, the adjustment wire rope 44 is scaled, thereby achieving fine adjustment of the position of the lifting device 52. The adjustment driver 42 can be a mechanism that outputs rotational motion, such as a hydraulic motor, electric motor, or pneumatic motor, and its specific structure is not limited to the examples mentioned above. The number of second adjustment pulleys 43 can be one or more arranged at intervals. The specific number of second adjustment pulleys 43 and their specific positions on the rotating platform 2 can be set according to the movement trajectory requirements of the adjustment wire rope 44, which can accommodate changes in lifting height and lifting amplitude. Similarly, as Figure 1 As shown, the number of first adjusting pulleys 31 can be one. In other embodiments, the number of first adjusting pulleys 31 can be two or more, and they can be spaced apart along the length and / or width direction of the boom 3. For example, multiple first adjusting pulleys 31 can be divided into multiple groups, or a portion of the first adjusting pulleys 31 can be located on the side of the boom 31 closer to the rotating platform 2. The specific number of first adjusting pulleys 31 and their specific positions on the boom 3 can be set according to the movement trajectory requirements of the adjusting wire rope 44, and can accommodate changes in lifting height and lifting radius, and are not limited to the examples above. Similarly, the number of adjusting wire ropes 44 can be one or more, improving the reliability of hoisting.

[0028] like Figure 1 , 3As shown, preferably, the rotating platform 2 is provided with a second hanging hole, and the second adjusting pulley 43 is connected to the second hanging hole via a second hook 22. Specifically, the rotating platform 2 is provided with a second connecting member 23, which is provided with a second hanging hole. The second adjusting pulley 43 can rotate relative to the second connecting member 23 to adapt to the angle changes of the adjusting wire rope 44 during lifting and lowering, making the movement of the adjusting wire rope 44 smoother. Preferably, the second hook 22 is provided with a safety buckle to prevent the second hook 22 from disengaging from the second hanging hole during operation, thus preventing the second adjusting pulley 43 from separating from the rotating platform 1.

[0029] like Figure 1 , 5 As shown, the crane also includes a luffing mechanism 7 for driving the boom 3 to rotate relative to the rotating platform 2, and a column 21 located on the rotating platform 2. The column 21 is a plate beam type column 21, which can be in the shape of an A-frame. The luffing mechanism 7 includes a luffing drum 71 located on the rotating platform 2, a luffing driver 72 for driving the luffing drum 71 to rotate, a first luffing pulley 73 located on the column 21, a second luffing pulley 74 located at the other end of the boom 3, and a luffing wire rope 75. The luffing drum 71 and the luffing driver 72 are located in the machine room 61. One end of the luffing wire rope 75 is wound around the luffing drum 71 and passes through the first luffing pulley 73 and the second luffing pulley 74 in sequence. The other end of the luffing wire rope 75 is fixed to the rotating platform 2 or the column 21. The luffing actuator 72 drives the luffing drum 71 to rotate, thereby expanding and contracting the luffing wire rope 75. This causes one end of the boom 3 to rotate around the pin, enabling the other end of the boom 3 to move up and down, thus changing the lifting radius of the boom 3 and facilitating the lifting or lowering of goods by the spreader 52. The luffing mechanism 7, the position adjustment drive device 4, and the adjusting wire rope 44 work together to achieve rapid and precise adjustment of the position of the spreader 52. In other embodiments, the luffing mechanism 7 may not include the luffing wire rope. For example, the luffing mechanism 7 includes a hydraulic cylinder hinged to the column 21 or the rotating platform 3. The piston rod of the hydraulic cylinder is hinged to the boom 3, and the lifting radius of the boom 3 is adjusted by controlling the extension and retraction length of the piston rod. Alternatively, the luffing mechanism 7 may also be a rack and pinion transmission structure, specifically including a rotary actuator located on the column 21. The output end of the rotary actuator meshes with a luffing rack via a gear, and the other end of the luffing rack is hinged to the boom 3. The structure of the luffing mechanism 7 is not limited to the examples above; it can be adjusted by adjusting the rotation of the boom 3 relative to the rotating platform 2 within a certain angle range.

[0030] like Figure 1 , 5As shown, the rotating platform 2 is equipped with a lifting drive 53 and a lifting drum 54 connected to the lifting drive 53. The column 21 is equipped with a first lifting pulley 55, and the other end of the boom 3 is equipped with a second lifting pulley 56. One end of the lifting wire rope 51 is wound around the lifting drum 54 and sequentially passes over the first lifting pulley 55 and the second lifting pulley 56 before connecting to the lifting device 52. The lifting drive 53 and the lifting drum 54 are located in the machine room 6. The lifting drive 53 drives the lifting drum 54 to rotate, thereby expanding and contracting the lifting wire rope 51 and enabling the lifting device 52 to move up and down, lifting or lowering the goods to be transported. The lifting drive 53 can be a hydraulic motor, electric motor, or pneumatic motor, etc., that outputs rotational motion; its specific structure is not limited to the examples described above. The number of first lifting pulleys 55 and second lifting pulleys 56 is not limited to one; there can be two or more. Their placement and number on the boom 3 or column 21 depend on the actual needs of the goods being lifted and are not limited here.

[0031] like Figure 1 , 5 As shown, the top of the gantry 1 is rotatably connected to a rotating platform 2 via a planar rotary support. The crane also includes a rotating mechanism 8 for driving the rotating platform 2 to rotate relative to the gantry 1. The rotating mechanism 8 drives the rotating platform 2 to rotate relative to the gantry 1 at a certain angle. The structure of the rotating mechanism 8 is prior art, and its specific structure will not be described here.

[0032] like Figure 1 , 4 As shown, the bottom of the gantry 1 is equipped with a traveling mechanism 11, which facilitates the movement of the crane. Windproof cables 12 are installed on both sides of the bottom of the gantry 1. The windproof cables 12 fix the crane to the ground, limiting its movement and ensuring the stability of the entire structure, thus facilitating wind protection. A cable reel (not shown) is installed on one side of the gantry 1. The cable reel can wind up and unwind cables according to the required length for power connection to the crane. The traveling mechanism 11, windproof cables 12, and cable reel are existing technologies, and their specific structures will not be described in detail here. The machine room 6 also houses an electrical control system 9. The regulating drive 42, luffing drive 72, lifting drive 53, traveling mechanism 11, and rotating mechanism 8 are connected to the electrical control system 9 via wires.

[0033] The crane provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A crane, characterized in that, include: A gantry frame is provided with a rotating platform at its top. The rotating platform is equipped with a boom and a position adjustment drive device. One end of the boom is hinged to the rotating platform, and the other end of the boom is suspended and connected to a lifting device via a lifting wire rope. The boom is also equipped with a first adjusting pulley, which is located between the rotating platform and the lifting device. The position adjustment drive device is connected to an adjusting wire rope, which passes around the first adjusting pulley and is connected to the lifting device.

2. The crane as described in claim 1, characterized in that, The first adjusting pulley is located in the middle of the bottom side of the boom, and the lifting wire rope passes around the top side of the boom.

3. The crane as described in claim 1, characterized in that, The boom has a first hanging hole on its bottom side, and the first adjusting pulley is connected to the first hanging hole through a first hook.

4. The crane as described in any one of claims 1-3, characterized in that, The position adjustment drive device includes an adjustment drum disposed on the rotating platform and an adjustment driver for driving the adjustment drum to rotate. The rotating platform is provided with a second adjustment pulley. The adjustment wire rope is wound around the adjustment drum and passes through the second adjustment pulley and the first adjustment pulley in sequence before being connected to the lifting device.

5. The crane as described in claim 4, characterized in that, The rotating platform is provided with a second hanging hole, and the second adjusting pulley is connected to the second hanging hole through a second hook.

6. The crane as claimed in claim 1, characterized in that, It also includes a luffing mechanism for driving the boom to rotate relative to the rotating platform, and a column disposed on the rotating platform. The luffing mechanism includes a luffing drum disposed on the rotating platform, a luffing driver for driving the luffing drum to rotate, a first luffing pulley disposed on the column, a second luffing pulley disposed at the other end of the boom, and a luffing wire rope. One end of the luffing wire rope is wound around the luffing drum and passes through the first luffing pulley and the second luffing pulley in sequence. The other end of the luffing wire rope is fixed to the rotating platform or the column.

7. The crane as claimed in claim 1, characterized in that, The rotating platform is provided with a column, a lifting drive, and a lifting drum connected to the lifting drive. The column is provided with a first lifting pulley, and the other end of the boom is provided with a second lifting pulley. One end of the lifting wire rope is wound around the lifting drum and passes through the first lifting pulley and the second lifting pulley in sequence before connecting to the lifting device.

8. The crane as claimed in claim 1, characterized in that, The bottom of the gantry is equipped with windproof cables on both sides.

9. The crane as claimed in claim 1, characterized in that, The lifting device may be a hook, ring, beam, grab, clamp, lifting clamp, or suction cup.

10. The crane as claimed in claim 1, characterized in that, The bottom of the gantry is equipped with a traveling mechanism.

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