A crane spreader with precise positioning and a crane using the spreader

Abstract

The present invention relates to a crane spreader with accurate positioning, including a control device. It further includes a spreader platform, on which the control device is installed. Lifting lugs are arranged at the four corners of the top surface of the spreader platform. A first adjustment component is installed on the bottom surface of the spreader platform, and two groups of second adjustment components are symmetrically arranged on the first adjustment component. Two groups of fixture components are symmetrically arranged on each group of second adjustment components. The fixture components are all located inside the second adjustment components. Each fixture component includes a fixture. A first groove structure is formed on the top surface of the fixture located at the top of the second adjustment component, and a first proximity switch is arranged in the first groove structure. A second groove structure is formed on the bottom surface of the fixture located at the bottom of the second adjustment component, and a second proximity switch is arranged in the second groove structure. The present invention also discloses a crane using the crane spreader with accurate positioning. The present invention can accurately position cylindrical workpieces to reduce the risk of the cylindrical workpieces falling during lifting and transportation.

Description

Technical Field

[0001] The invention belongs to the technical field of cranes, and in particular relates to a crane hoist with accurate positioning and a crane using the hoist. Background Art

[0002] At present, in the process of producing and processing cylindrical workpieces such as reels and steel coils in workshops, bridge cranes are usually used for lifting and transportation. During lifting, the cylindrical workpiece is usually set on a workbench, and some of the existing crane slings for lifting cylindrical workpieces use two L-shaped hooks as slings to hang the two ends of the cylindrical workpiece respectively; some use a straight shaft to penetrate the cylindrical workpiece and then set lifting ropes at both ends of the straight shaft to form a simple sling. However, no matter what kind of crane sling is used, the positioning of the cylindrical workpiece is not accurate, that is, the cylindrical workpiece is not firmly fixed, and finally it needs to be lifted by the lifting mechanism on the lifting trolley. The lifting mechanism usually reels and unwinds the wire rope to drive the sling to rise and fall. In the process of driving the sling to rise and fall, the wire rope will inevitably shake. If the crane sling does not firmly fix the cylindrical workpiece, coupled with the influence of the shaking of the wire rope, there will be a risk of the cylindrical workpiece falling. Therefore, how to firmly fix the cylindrical workpiece to reduce the risk of the cylindrical workpiece falling during lifting and transportation needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to provide a crane sling with precise positioning and a crane using the sling, which can accurately position cylindrical workpieces, that is, firmly fix the cylindrical workpieces, so as to reduce the risk of the cylindrical workpieces falling during lifting and transportation.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A crane spreader with precise positioning includes a control device, and is characterized in that: it further includes a horizontally arranged spreader platform, on which the control device is installed. At the four corners of the top surface of the spreader platform, lifting lug assemblies are arranged. Horizontally distributed first adjustment components are installed on the bottom surface of the spreader platform. The first adjustment components are in signal connection with the control device. On the first adjustment components, two groups of second adjustment components are symmetrically arranged, which can move horizontally along the first adjustment components and can approach or move away from each other. The second adjustment components are in signal connection with the control device. The second adjustment components are vertically distributed. On each group of second adjustment components, two groups of fixture components are symmetrically arranged, which can move vertically along the second adjustment components and can approach or move away from each other. The fixture components are all located inside the second adjustment components. Each fixture component includes a horizontally distributed fixture. On the top surface of the fixture located at the top of the second adjustment component, a first groove structure is provided. And on the top surface of the side of the fixture close to the second adjustment component, a vertically distributed first limiting plate is fixedly connected. The top surface of the other side of the fixture is an arc surface. In the first groove structure, a vertically distributed first proximity switch in signal connection with the control device is arranged. On the bottom surface of the fixture located at the bottom of the second adjustment component, a second groove structure is provided. And on the bottom surface of the side of the fixture close to the second adjustment component, a vertically distributed second limiting plate is fixedly connected. The top surface of the other side of the fixture is an arc surface. In the second groove structure, a vertically distributed second proximity switch in signal connection with the control device is arranged.

[0006] Further, the first adjustment component includes two vertically opposite first adjustment seats. The tops of the first adjustment seats are fixedly connected to the spreader platform respectively. Between the two first adjustment seats, two horizontally opposite first guide rods are fixedly connected. Between the two first guide rods, a first adjustment lead screw parallel to the first guide rods is arranged. The two ends of the first adjustment lead screw are respectively rotationally connected to the first adjustment seats. One end of the first adjustment lead screw passes through the first adjustment seat and is rotationally connected to a first adjustment motor. The spiral directions on both sides of the first adjustment lead screw are opposite. On both sides of the first adjustment lead screw, first sliders are respectively threadedly connected. The top and bottom ends of the first sliders are respectively sleeved on the first guide rods. The bottom ends of the first sliders are respectively provided with the second adjustment components. The first adjustment motor is in signal connection with the control device. The first adjustment motor is installed on the first adjustment seat through a first motor bracket.

[0007] Furthermore, the second adjusting component includes a vertically distributed connecting plate, the top of the connecting plate is fixedly connected to the first sliding block, and two horizontally oppositely distributed second adjusting seats are fixedly connected to the inner side of the connecting plate, two vertically oppositely distributed second guide rods are fixedly connected between the two second adjusting seats, and a second adjusting screw parallel to the second guide rod is arranged between the two second guide rods, both ends of the second adjusting screw are respectively rotatably connected to the second adjusting seat and the bottom end of the second adjusting screw passes through the second adjusting seat and is rotatably connected to the second adjusting motor, the top and bottom of the second adjusting screw have opposite spiral rotation directions and the top and bottom of the second adjusting screw are respectively threadedly connected to the second sliding block, and the second sliding block The two sides are respectively sleeved on the second guide rod, the inner side of the second slider is fixedly connected to the clamp, the second adjusting motor is connected to the control device signal, the second adjusting motor is installed on the second adjusting seat through the second motor bracket, a horizontally distributed mounting plate is arranged below the second adjusting motor, the mounting plate is fixedly connected to the connecting plate, a vertically distributed first laser rangefinder connected to the control device signal is fixedly connected to the bottom surface of the mounting plate, a horizontally distributed second laser rangefinder connected to the control device signal is fixedly connected to the inner side surface of the mounting plate of one group of second adjusting components, and a laser sensing area arranged opposite to the second laser rangefinder is arranged on the inner side surface of the mounting plate of another group of second adjusting components.

[0008] Furthermore, a hook assembly is provided at the bottom of the outer side of each group of second adjustment components, and the hook assembly includes a first ear and a second ear that are spaced relatively from each other, the first ear and the second ear are fixedly connected to the outer side of the connecting plate, the first ear is located above the second ear, a second lifting chain is provided on the first ear, a hanging plate is hinged on the second ear, the second lifting chain is connected to the hanging plate, and an anti-drop hook is provided on the end of the hanging plate away from the second ear.

[0009] Furthermore, an auxiliary sling assembly is arranged on the first adjustment component between the two groups of second adjustment components, and the auxiliary sling assembly includes a vertically distributed support seat, the support seat is located in the middle position of the first adjustment screw and the support seats are respectively mounted on the first adjustment screw and the first guide rod, the top of the support seat is fixedly connected to the sling platform, and the bottom end of the support seat is rotatably connected to a lifting ring, and two detachable first lifting chains are symmetrically arranged on the lifting ring, and the first lifting chains are each provided with a suction cup electromagnet connected to the control device signal.

[0010] Furthermore, each set of lifting ear assemblies includes two horizontally relatively distributed adjustment plates, and a lifting ear is arranged between the two adjustment plates. The lifting ears are fixedly connected with horizontally distributed threaded rods on both sides close to the adjustment plates. The threaded rods are slidably connected to the adjustment plates through slideways opened on the adjustment plates and passing through the adjustment plates, and the threaded rods are threadedly connected with positioning nuts after passing through the adjustment plates.

[0011] The present invention also discloses a crane using the above-mentioned accurately positioned crane spreader, which includes a crane control system signal-connected to a control device and two end beams horizontally distributed opposite to each other. Between the two end beams, there are two main beams horizontally distributed opposite to each other, and a trolley traveling mechanism is provided on one of the end beams. It is characterized in that: two hoisting trolleys capable of moving along the main beams are symmetrically arranged between the two main beams. On each hoisting trolley, two hoisting hooks are arranged through steel wire ropes, and each hoisting hook hoists the ear assembly respectively. The two hoisting trolleys are detachably and fixedly connected to each other.

[0012] Further, two connecting rods horizontally distributed opposite to each other are arranged between the two hoisting trolleys. The connecting rods are split connecting rods. Each connecting rod includes a first connecting rod and a second connecting rod arranged opposite to each other. One end of the first connecting rod away from the second connecting rod is fixedly connected to one of the hoisting trolleys. A plurality of equally spaced first connecting holes are formed in the other end of the first connecting rod along the length direction of the first connecting rod. One end of the second connecting rod away from the first connecting rod is fixedly connected to the other hoisting trolley. A plurality of equally spaced second connecting holes are formed in the other end of the second connecting rod along the length direction of the second connecting rod. A locking bolt is arranged between the second connecting hole and the first connecting hole. The screw rod of the locking bolt passes through the first connecting rod and the second connecting rod in sequence through the first connecting hole and the second connecting hole. A locking nut is also threadedly connected to the screw rod of the locking bolt.

[0013] Adopting the above technical solution, the beneficial effects of the present invention are:

[0014] When the present invention is in use, a cylindrical workpiece is erected on a workbench, and both ends of the cylindrical workpiece need to extend outside the workbench. By setting a control device, a sling platform, a lifting lug assembly, a first adjustment assembly, a second adjustment assembly and a fixture assembly, a special crane sling for cylindrical workpieces can be formed. Specifically, the sling platform is used to support the lifting lug assembly and the first adjustment assembly and indirectly support the second adjustment assembly and the fixture assembly; the lifting lug assembly is convenient for the lifting mechanism of the crane to lift; the first adjustment assembly is used to horizontally adjust the positions between the second adjustment assemblies, so as to indirectly horizontally adjust the positions between the fixture assemblies; the second adjustment assembly is used to vertically adjust the positions between the fixture assemblies; the fixture assembly is used to fix the cylindrical workpiece; the control device is used to control the operation of the first adjustment assembly, the second adjustment assembly and the fixture assembly respectively, making the crane sling more intelligent and convenient, which is helpful for lifting the cylindrical workpiece. In addition, the first proximity switch and the second proximity switch are used in the fixture assembly to accurately control the fixing of the cylindrical workpiece. Therefore, the present invention can accurately position the cylindrical workpiece, that is, firmly fix the cylindrical workpiece, so as to reduce the risk of the cylindrical workpiece falling during lifting and transportation. Moreover, the present invention can lift cylindrical workpieces of different specifications; on this basis, by setting a hook assembly, cylindrical workpieces with a length exceeding the adjustment stroke of the first adjustment assembly can be lifted; and by setting an auxiliary sling assembly to assist in fixing the cylindrical workpiece, the present invention can more effectively lift and transport cylindrical workpieces of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the crane sling with accurate positioning of the present invention;

[0016] Figure 2 is Figure 1 a three-dimensional structural diagram of the lifting lug assembly in

[0017] Figure 3 is a schematic structural diagram of the crane using the crane sling with accurate positioning of the present invention;

[0018] Figure 4 is Figure 3 a three-dimensional structural diagram of the connecting rod in

[0019] Figure 5 is one of the schematic structural diagrams of the present invention in the use state;

[0020] Figure 6 is the second schematic structural diagram of the present invention in the use state.

[0021] Reference numerals: 1, control device; 2, second adjustment assembly; 20, second laser rangefinder; 21, second adjustment base; 22, second guide rod; 23, second adjustment lead screw; 24, second adjustment motor; 25, second slider; 26, second motor bracket; 27, connecting plate; 28, mounting plate; 29, first laser rangefinder; 3, fixture assembly; 31, fixture; 32, first groove structure; 33, first limiting plate; 34, first proximity switch; 35, second groove structure; 36, second limiting plate; 37, second proximity switch; 4, auxiliary lifting tool assembly; 41, support base; 42, lifting ring; 43, first lifting chain; 44, suction electromagnet; 5, first adjustment assembly; 51, first adjustment base; 52, first guide rod; 53, first adjustment lead screw; 54, first adjustment motor; 55, first slider; 56, first motor bracket; 6, lifting lug assembly; 61, adjustment plate; 62, lifting lug; 63, threaded rod; 64, slideway; 65, positioning nut; 7, hoisting trolley; 71, steel wire rope; 72, hoisting hook; 8, connecting rod; 81, first connecting rod; 82, second connecting rod; 83, locking bolt; 84, locking nut; 9, hook assembly; 91, first ear; 92, second ear; 93, second lifting chain; 94, lifting plate; 95, anti-drop hook; 10, lifting tool platform; 11, end beam; 12, trolley traveling mechanism; 13, main beam; 14, cylindrical workpiece. Detailed implementation manners

[0022] To make the objectives, technical solutions and beneficial effects of the present invention clearer, the following further describes the embodiments of the present invention in detail with reference to the drawings.

[0023] When the present invention is in use, the cylindrical workpiece 14 is placed on the workbench, and both ends of the cylindrical workpiece 14 need to extend outside the workbench. The present invention is manually operated for lifting, such as Figures 1 to 3 , Figure 5 and Figure 6As shown in the figure, the present invention provides a crane spreader with precise positioning, including a control device 1. Specifically, the control device 1 adopts an existing PLC control system, which has functions such as conversion, reception, processing, transmission, and control. It also includes a horizontally arranged spreader platform 10, on which the control device 1 is installed. Hoisting lugs 6 are arranged at the four corners of the top surface of the spreader platform 10. A horizontally distributed first adjustment component 5 is installed on the bottom surface of the spreader platform 10. The first adjustment component 5 is signal-connected to the control device 1, and the control device 1 can control the operation of the first adjustment component 5. Two groups of second adjustment components 2 that can move horizontally along the first adjustment component 5 and can approach or move away from each other are symmetrically arranged on the first adjustment component 5. The second adjustment component 2 is signal-connected to the control device 1, and the control device 1 can control the operation of the second adjustment component 2. The second adjustment components 2 are vertically distributed. Two groups of clamp components 3 that can move vertically along the second adjustment component 2 and can approach or move away from each other are symmetrically arranged on each group of second adjustment components 2. The clamp components 3 are all located inside the second adjustment components 2. Each clamp component 3 includes a horizontally distributed clamp 31. During use, the clamp 31 is located inside the cylindrical workpiece 14 and abuts against the inner wall of the cylindrical workpiece 14. A first groove structure 32 is provided on the top surface of the clamp 31 at the top of the second adjustment component 2. The first groove structure 32 is used to increase the friction force at the position where the clamp 31 abuts against the inner wall of the cylindrical workpiece 14. A vertically distributed first limiting plate 33 is fixedly connected to the top surface of the clamp 31 on the side close to the second adjustment component 2. The first limiting plate 33 is used to limit the length of the clamp 31 inside the cylindrical workpiece 14. The top surface of the other side of the clamp 31 is an arc surface, which facilitates the entry of this side of the clamp 31 into the cylindrical workpiece 14. A vertically distributed first proximity switch 34 signal-connected to the control device 1 is arranged in the first groove structure 32. The first proximity switch 34 is an inductive proximity switch. The first proximity switch 34 is used to detect whether the clamp 31 at the top is in place, that is, to detect the distance between the clamp 31 and the inner wall of the cylindrical workpiece 14 and feedback it to the control device 1;On the bottom surface of the fixture 31 located at the bottom of the second adjustment component 2, a second groove structure 35 is provided. The second groove structure 35 is also used to increase the friction force at the position where the fixture 31 abuts against the inner wall of the cylindrical workpiece 14. And on the bottom surface of the fixture 31 close to the second adjustment component 2, a vertically distributed second limiting plate 36 is fixedly connected. The second limiting plate 36 is also used to limit the length of the fixture 31 inside the cylindrical workpiece 14. The top surface of the other side of the fixture 31 is an arc surface, which facilitates the entry of this side of the fixture 31 into the cylindrical workpiece 14. A second proximity switch 37 which is vertically distributed and signal-connected to the control device 1 is arranged in the second groove structure 35. The second proximity switch 37 is an inductive proximity switch. The second proximity switch 37 is used to detect whether the fixture 31 at the bottom is in place, that is, to detect the distance between the fixture 31 and the inner wall of the cylindrical workpiece 14 and feedback it to the control device 1. By arranging the control device 1, the lifting platform 10, the lifting lug assembly 6, the first adjustment component 5, the second adjustment component 2 and the fixture component 3, a special crane lifting tool for cylindrical workpieces can be formed. Specifically, the lifting platform 10 is used to support the lifting lug assembly 6 and the first adjustment component 5 and to indirectly support the second adjustment component 2 and the fixture component 3; the lifting lug assembly 6 facilitates the lifting mechanism of the crane to lift; the first adjustment component 5 is used to horizontally adjust the position between the second adjustment components 2 to indirectly horizontally adjust the position between the fixture components 3; the second adjustment component 2 is used to vertically adjust the position between the fixture components 3; the fixture component 3 is used to fix the cylindrical workpiece 14; the control device 1 is used to control the operation of the first adjustment component 5, the second adjustment component 2 and the fixture component 3 respectively, making the crane lifting tool more intelligent and convenient, which helps to lift and transport the cylindrical workpiece 14. In addition, by adopting the first proximity switch 34 and the second proximity switch 37 in the fixture component 3, the fixing of the cylindrical workpiece 14 can be accurately controlled. Therefore, the present invention can accurately position the cylindrical workpiece 14, that is, firmly fix the cylindrical workpiece 14, so as to reduce the risk of the cylindrical workpiece 14 falling during the hoisting and handling process, and the present invention can hoist cylindrical workpieces of different specifications.;

[0024] The specific structure of the first adjustment component 5 is as follows: As Figure 1 , Figure 3 , Figure 5 and Figure 6As shown in the figure, the first adjustment component 5 includes two first adjustment seats 51 vertically and oppositely distributed. The tops of the first adjustment seats 51 are fixedly connected to the sling platform 10. Two horizontally and oppositely distributed first guide rods 52 are fixedly connected between the two first adjustment seats 51. A first adjustment lead screw 53 parallel to the first guide rods 52 is arranged between the two first guide rods 52. The two ends of the first adjustment lead screw 53 are respectively rotatably connected to the first adjustment seats 51, and one end of the first adjustment lead screw 53 passes through the first adjustment seat 51 and is rotatably connected to a first adjustment motor 54. The spiral directions on both sides of the first adjustment lead screw 53 are opposite, and first sliders 55 are respectively threadedly connected to both sides of the first adjustment lead screw 53. The top and bottom ends of the first sliders 55 are respectively sleeved on the first guide rods 52. The second adjustment components 2 are arranged at the bottom ends of the first sliders 55. The first adjustment motor 54 is signal-connected to the control device 1. The control device 1 can control the operation of the first adjustment motor 54. The first adjustment motor 54 is installed on the first adjustment seat 51 through a first motor bracket 56. Specifically, the first adjustment motor 54 is a forward and reverse rotation motor and is the power source for the rotation of the first adjustment lead screw 53. When the first adjustment motor 54 drives the first adjustment lead screw 53 to rotate, the two first sliders 55 can horizontally move along the first adjustment lead screw 53 to approach or move away from each other, so as to horizontally adjust the position between the second adjustment components 2, and indirectly horizontally adjust the position between the fixture components 3.

[0025] The specific structure of the second adjustment component 2 is as follows: As Figure 1 、 Figure 3 、 Figure 5 And Figure 6As shown in the figure, the second adjustment component 2 includes a vertically distributed connecting plate 27. The top end of the connecting plate 27 is fixedly connected to the first slider 55. Two horizontally opposite second adjustment seats 21 are fixedly connected to the inner side of the connecting plate 27. Two vertically opposite second guide rods 22 are fixedly connected between the two second adjustment seats 21. A second adjustment lead screw 23 parallel to the second guide rods 22 is arranged between the two second guide rods 22. The two ends of the second adjustment lead screw 23 are respectively rotatably connected to the second adjustment seats 21, and the bottom end of the second adjustment lead screw 23 passes through the second adjustment seat 21 and is rotatably connected to a second adjustment motor 24. The spiral directions of the top and bottom of the second adjustment lead screw 23 are opposite, and second sliders 25 are respectively threadedly connected to the top and bottom of the second adjustment lead screw 23. The two sides of the second sliders 25 are respectively sleeved on the second guide rods 22. The inner sides of the second sliders 25 are fixedly connected to the fixture 31. The second adjustment motor 24 is signal-connected to the control device 1. The control device 1 can control the operation of the second adjustment motor 24. The second adjustment motor 24 is installed on the second adjustment seat 21 through a second motor bracket 26. Specifically, the second adjustment motor 24 is a forward and reverse motor and is the power source for the rotation of the second adjustment lead screw 23. When the second adjustment motor 24 drives the second adjustment lead screw 23 to rotate, the two second sliders 25 can vertically move along the second adjustment lead screw 23 to approach or move away from each other, so that the position between the fixture assemblies 3 can be vertically adjusted. In addition, a horizontally distributed mounting plate 28 is arranged below the second adjustment motor 24. The mounting plate 28 is fixedly connected to the connecting plate 27. A first laser rangefinder 29 vertically distributed and signal-connected to the control device 1 is fixedly connected to the bottom surface of the mounting plate 28. At this time, a laser sensing area of the first laser rangefinder 29 needs to be set on the ground at the position of the cylindrical workpiece 14. The first laser rangefinder 29 is used to detect the distance between the bottom of the lifting appliance and the ground to avoid damage to the lifting appliance due to touching the bottom. In addition, a second laser rangefinder 20 horizontally distributed and signal-connected to the control device 1 is fixedly connected to the inner side surface of the mounting plate 28 of one group of the second adjustment components 2. A laser sensing area opposite to the second laser rangefinder 20 is arranged on the inner side surface of the mounting plate 28 of the other group of the second adjustment components 2. The second laser rangefinder 20 is used to detect the distance between the two second adjustment components 2, which is more convenient for limiting the length of the fixture 31 located inside the cylindrical workpiece 14.

[0026] The specific structure of the lifting appliance assembly 6 is as follows: As Figures 1 to 3 、 Figure 5 And Figure 6As shown, each set of lifting lug assemblies 6 includes two adjusting plates 61 horizontally distributed opposite to each other. A lifting lug 62 is arranged between the two adjusting plates 61. Horizontally distributed threaded rods 63 are fixedly connected to both sides of the lifting lug 62 close to the adjusting plates 61. The threaded rods 63 are slidably connected to the adjusting plates 61 through slideways 64 opened in the adjusting plates 61 and penetrating through the adjusting plates 61. After the threaded rods 63 penetrate through the adjusting plates 61, positioning nuts 65 are threadedly connected. The positioning nuts 65 are used to fix the positions of the threaded rods 63 on the adjusting plates 61, thereby fixing the positions of the lifting lugs 62 on the adjusting plates 61. Through such a setting method, the lifting lugs 62 can move and be fixed on the adjusting plates 61, so that when the lifting mechanism of the crane lifts the lifting lugs 62, the forces on both sides of the spreader platform 10 can be balanced, the inclination degree of the cylindrical workpiece 14 can be reduced, and the stability of the lifting of the cylindrical workpiece 14 can be improved.

[0027] Since the lengths of the cylindrical workpieces 14 are different, and the above-mentioned crane spreader can only lift the cylindrical workpieces 14 with lengths less than the adjustment stroke of the first adjustment assembly 5, the above-mentioned crane spreader has limitations. Therefore, as Figure 1 、 Figure 3 、 Figure 5 and Figure 6 shown, at the bottom outside each set of second adjustment assemblies 2, a hook assembly 9 is arranged. The hook assembly 9 includes two first ear plates 91 and second ear plates 92 distributed opposite to each other at intervals. The first ear plates 91 and the second ear plates 92 are fixedly connected to the outer side surface of the connecting plate 27. The first ear plates 91 are located above the second ear plates 92. A second lifting chain 93 is arranged on the first ear plates 91. A hanging plate 94 is hinged on the second ear plates 92. The second lifting chain 93 is connected to the hanging plate 94. An anti-detachment hook 95 is arranged at one end of the hanging plate 94 away from the second ear plate 92. Specifically, the second lifting chain 93 can limit the inclination degree of the hanging plate 94, that is, limit the included angle between the hanging plate 94 and the connecting plate 27, to adjust the position of the anti-detachment hook 95. At this time, lifting chains or ropes need to be sleeved on both ends of the cylindrical workpiece 14, and the anti-detachment hook 95 is used to lift the lifting chains or ropes. On the basis of the above-mentioned crane spreader, by arranging the hook assembly 9, the cylindrical workpieces 14 with lengths exceeding the adjustment stroke of the first adjustment assembly 5 can be lifted.

[0028] Furthermore, as Figure 1 、 Figure 3 and Figure 6As shown in the figure, an auxiliary lifting tool assembly 4 is provided on the first adjusting assembly 5 between two groups of second adjusting assemblies 2. The auxiliary lifting tool assembly 4 includes a vertically distributed support base 41. The support base 41 is located at the middle position of the first adjusting lead screw 53, and the support base 41 is sleeved on the first adjusting lead screw 53 and the first guide rod 52 respectively. The first adjusting lead screw 53 and the first guide rod 52 are in clearance fit with the support base 41. The top end of the support base 41 is fixedly connected to the lifting platform 10, and the bottom end of the support base 41 is rotatably connected with a lifting ring 42. Two detachable first lifting chains 43 are symmetrically arranged on the lifting ring 42, and sucker electromagnets 44 signal-connected to the control device 1 are arranged on the first lifting chains 43. Specifically, the sucker electromagnet 44 has magnetism when energized and the magnetism disappears when de-energized. The control device 1 can control whether the sucker electromagnet 44 is energized. When the sucker electromagnet 44 is not used, the sucker electromagnet 44 can be removed by detaching the first lifting chain 43. When in use, the sucker electromagnet 44 adsorbs on the outer wall of the cylindrical workpiece 14 to assist in fixing the cylindrical workpiece 14. By setting the auxiliary lifting tool assembly 4, the cylindrical workpiece 14 can be assisted in fixing, so that the present invention can more effectively lift and transport cylindrical workpieces 14 of different specifications.

[0029] As Figures 3 to 6 shown in the figure, the present invention also discloses a crane using the accurately positioned crane lifting tool, which includes a crane control system signal-connected to the control device 1 and two horizontally oppositely distributed end beams 11. The lifting control system is the same as the control system used in existing cranes and can control the operation of each mechanism on the crane. The control device 1 can transmit data to the crane control system for storage. Two horizontally oppositely distributed main beams 13 are arranged between the two end beams 11, and a trolley traveling mechanism 12 is arranged on one of the end beams 11. The trolley traveling mechanism 12 includes a trolley motor, a trolley reducer, trolley wheels and trolley brakes. The trolley traveling mechanism 12 can enable the entire crane to run horizontally along the track. Two hoisting trolleys 7 capable of moving along the main beams 13 are symmetrically arranged between the two main beams 13. Two hoisting hooks 72 are arranged on each hoisting trolley 7 through steel wires 71, and each hoisting hook 72 hoists the corresponding lifting lug assembly 6 respectively. Since the number of the lifting lug assemblies 6 is four groups, the number of the hoisting hooks 72 on each hoisting trolley 7 is two. In addition, the hoisting trolley further includes a trolley frame and a hoisting mechanism. The hoisting mechanism is installed on the trolley frame. The hoisting mechanism includes a hoisting motor, a hoisting reducer, a drum and a hoisting brake. The steel wire 71 is wound around the drum, and the end of the steel wire 71 is installed with the hoisting hook 72. Additionally, since two hoisting trolleys 7 are used to lift the lifting tool, to ensure the synchronous operation of the two hoisting trolleys 7, the two hoisting trolleys 7 are detachably and fixedly connected. At this time, one hoisting trolley 7 operates actively and the other hoisting trolley 7 operates passively, which is equivalent to having an additional spare hoisting trolley.

[0030] The specific way of detachably fixing the connection between two hoisting trolleys 7 is as follows: As Figures 3 to 6 shown, there are two horizontally and oppositely distributed connecting rods 8 arranged between the two hoisting trolleys 7. The connecting rods 8 are split connecting rods. Each connecting rod 8 includes a first connecting rod 81 and a second connecting rod 82 which are arranged oppositely. One end of the first connecting rod 81 away from the second connecting rod 82 is fixedly connected to one of the hoisting trolleys 7. A plurality of equally spaced first connection holes 83 are formed at the other end of the first connecting rod 81 along the length direction of the first connecting rod 81. One end of the second connecting rod 82 away from the first connecting rod 81 is fixedly connected to the other hoisting trolley 7. A plurality of equally spaced second connection holes are formed at the other end of the second connecting rod 82 along the length direction of the second connecting rod 82. A locking bolt 83 is arranged between the second connection hole and the first connection hole. The screw rod of the locking bolt 83 passes through the first connecting rod 81 and the second connecting rod 82 in sequence through the first connection hole and the second connection hole. A locking nut 84 is also threadedly connected to the screw rod of the locking bolt 83. By setting the locking nut 84 and the locking bolt 83, the positions of the first connecting rod 81 and the second connecting rod 82 can be fixed after adjusting the distance between the first connecting rod 81 and the second connecting rod 82, so as to connect the two hoisting trolleys 7; the adjustable distance between the first connecting rod 81 and the second connecting rod 82 is to adapt to the adjustable position of the lifting lug 62 on the adjusting plate 61.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane spreader with precise positioning, including a control device, characterized in that: It further includes a horizontally arranged spreader platform, on which the control device is installed. Lifting lugs are arranged at the four corners of the top surface of the spreader platform. Horizontally distributed first adjusting components are installed on the bottom surface of the spreader platform. The first adjusting components are in signal connection with the control device. Two groups of second adjusting components that can move horizontally along the first adjusting components and can approach or move away from each other are symmetrically arranged on the first adjusting components. The second adjusting components are in signal connection with the control device and are vertically distributed. Two groups of clamping components that can move vertically along the second adjusting components and can approach or move away from each other are symmetrically arranged on each group of second adjusting components. The clamping components are all located inside the second adjusting components. Each clamping component includes a horizontally distributed clamp. A first groove structure is formed on the top surface of the clamp located at the top of the second adjusting component. And a vertically distributed first limiting plate is fixedly connected to the top surface of the side of the clamp close to the second adjusting component. The top surface of the other side of the clamp is an arc surface. A vertically distributed first proximity switch in signal connection with the control device is arranged in the first groove structure. A second groove structure is formed on the bottom surface of the clamp located at the bottom of the second adjusting component. And a vertically distributed second limiting plate is fixedly connected to the bottom surface of the side of the clamp close to the second adjusting component. The top surface of the other side of the clamp is an arc surface. A vertically distributed second proximity switch in signal connection with the control device is arranged in the second groove structure. The second adjusting component includes a vertically distributed connecting plate. Hook assemblies are arranged at the bottoms of the outsides of each group of second adjusting components. The hook assembly includes two first lugs and second lugs that are spaced relatively. The first lugs and the second lugs are both fixedly connected to the outer side surface of the connecting plate. The first lugs are located above the second lugs. A second lifting chain is arranged on the first lugs. A hanging plate is hinged to the second lugs. The second lifting chain is connected to the hanging plate. An anti - detachment hook is arranged at the end of the hanging plate far from the second lugs.

2. The accurately positioned crane spreader according to claim 1, characterized in that: The first adjusting component includes two vertically opposite first adjusting seats. The tops of the first adjusting seats are fixedly connected to the spreader platform. Two horizontally opposite first guiding rods are fixedly connected between the two first adjusting seats. A first adjusting lead screw parallel to the first guiding rods is arranged between the two first guiding rods. The two ends of the first adjusting lead screw are respectively rotatably connected to the first adjusting seats. One end of the first adjusting lead screw passes through the first adjusting seat and is rotatably connected to a first adjusting motor. The spiral directions on both sides of the first adjusting lead screw are opposite. First sliders are respectively threadedly connected to both sides of the first adjusting lead screw. The top and bottom ends of the first sliders are respectively sleeved on the first guiding rods. The second adjusting components are arranged at the bottom ends of the first sliders. The first adjusting motor is in signal connection with the control device. The first adjusting motor is installed on the first adjusting seat through a first motor bracket.

3. The accurately positioned crane spreader according to claim 2, characterized in that: The top end of the connecting plate is fixedly connected to the first slider. Two horizontally opposite second adjusting seats are fixedly connected to the inner side of the connecting plate. Two vertically opposite second guiding rods are fixedly connected between the two second adjusting seats. A second adjusting lead screw parallel to the second guiding rods is arranged between the two second guiding rods. The two ends of the second adjusting lead screw are respectively rotatably connected to the second adjusting seats, and the bottom end of the second adjusting lead screw passes through the second adjusting seat and is rotatably connected to a second adjusting motor. The spiral directions of the top and bottom of the second adjusting lead screw are opposite, and second sliders are respectively threadedly connected to the top and bottom of the second adjusting lead screw. The two sides of each second slider are respectively sleeved on the second guiding rods, and the fixtures are fixedly connected to the inner sides of the second sliders. The second adjusting motor is in signal connection with the control device, and the second adjusting motor is installed on the second adjusting seat through a second motor bracket. A horizontally distributed mounting plate is arranged below the second adjusting motor. The mounting plate is fixedly connected to the connecting plate, and a vertically distributed first laser rangefinder in signal connection with the control device is fixedly connected to the bottom surface of the mounting plate. A horizontally distributed second laser rangefinder in signal connection with the control device is fixedly connected to the inner side surface of the mounting plate of one group of second adjusting components, and a laser sensing area opposite to the second laser rangefinder is arranged on the inner side surface of the mounting plate of the other group of second adjusting components.

4. The accurately positioned crane spreader according to claim 2, wherein: An auxiliary lifting tool assembly is arranged on the first adjusting component between the two groups of second adjusting components. The auxiliary lifting tool assembly includes a vertically distributed support seat. The support seat is located at the middle position of the first adjusting lead screw and the support seat is respectively sleeved on the first adjusting lead screw and the first guiding rod. The top end of the support seat is fixedly connected to the lifting platform, and the bottom end of the support seat is rotatably connected to a lifting ring. Two detachable first lifting chains are symmetrically arranged on the lifting ring, and suction cup electromagnets in signal connection with the control device are arranged on the first lifting chains.

5. The positioning-precise crane spreader according to claim 1, characterized in that: Each lifting lug assembly includes two horizontally opposite adjusting plates. A lifting lug is arranged between the two adjusting plates. Horizontally distributed threaded rods are fixedly connected to both sides of the lifting lug close to the adjusting plates. The threaded rods are respectively slidably connected to the adjusting plates through slideways penetrating through the adjusting plates opened on the adjusting plates, and positioning nuts are respectively threadedly connected to the threaded rods after the threaded rods penetrate through the adjusting plates.

6. A crane using the accurately positioned crane spreader according to any one of claims 1 to 5, comprising a crane control system signal-connected to a control device and two end beams horizontally and oppositely distributed, two main beams horizontally and oppositely distributed are arranged between the two end beams, and a trolley traveling mechanism is arranged on one of the end beams, characterized in that: Two hoisting trolleys capable of moving along the main beams are symmetrically arranged between the two main beams. Two lifting hooks are arranged on each hoisting trolley through steel wires, and each lifting hook hoists the corresponding lifting lug assembly. The two hoisting trolleys are detachably and fixedly connected.

7. The crane using a hoist with accurate positioning according to claim 6, characterized in that: There are two horizontally oppositely distributed connecting rods arranged between two hoisting trolleys. The connecting rods are split connecting rods. Each connecting rod includes a first connecting rod and a second connecting rod which are oppositely arranged. One end of the first connecting rod far away from the second connecting rod is fixedly connected to one of the hoisting trolleys. A plurality of equally spaced first connection holes are formed at the other end of the first connecting rod along the length direction of the first connecting rod. One end of the second connecting rod far away from the first connecting rod is fixedly connected to the other hoisting trolley. A plurality of equally spaced second connection holes are formed at the other end of the second connecting rod along the length direction of the second connecting rod. A locking bolt is arranged between the second connection hole and the first connection hole. The screw rod of the locking bolt passes through the first connecting rod and the second connecting rod in sequence through the first connection hole and the second connection hole. A locking nut is also threadedly connected to the screw rod of the locking bolt.

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