Multi-head lifting appliance for single-beam and double-beam crane

Abstract

The invention discloses a multi-head type lifting appliance for a single-beam and double-beam crane, and relates to the technical field of cranes, in particular to a multi-head type lifting appliance which comprises a main body, an ejector block is fixedly connected to the middle of the upper end of the main body, guide grooves are symmetrically formed in the front side and the rear side of the ejector block, steps are arranged on the inner sides of the guide grooves, and the inlet ends of the guide grooves are located on the axis of the ejector block; a lifting box is movably installed at the upper end of the top block, a first connecting piece is fixedly installed at the upper end of the inner side of the lifting box, and a movable frame is fixedly connected to the bottom end of the first connecting piece. The guide groove is matched with the hook column, and the bent path of the guide groove is utilized, so that the lifting box can drive the top block to move together with the main body after the lifting box moves downwards for the first time and then moves upwards, the main body can move, and after the lifting box moves downwards for the second time and then moves upwards, the lifting box can move upwards. The hook column can slide out of the outlet end of the groove through cooperation with the step, and the main body can be lifted and put down through reciprocating lifting.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, in particular to a multi-head spreader for single-beam and double-beam cranes. Background Art

[0002] Single-beam crane and double-beam crane are two common types of industrial lifting equipment. Single-beam crane has a simple structure, only one main beam, light weight, relatively simple installation and maintenance, low cost, suitable for lightweight lifting operations; double-beam crane has a complex structure, with two parallel main beams, heavy deadweight, high installation and maintenance requirements, but high stability, suitable for heavy loads and frequent use occasions, but no matter single-beam crane or double-beam crane, generally need to be used with slings, and most of the existing slings have a simple structure, only using the gravity of the object itself to achieve clamping, once the object shakes during the lifting process and the center of gravity of the object changes, the object may slip due to loose clamping, the clamping is unstable, there is a disadvantage of low safety factor, and it has no auxiliary function when in use, it is not convenient to adjust the device according to actual use conditions, and the efficiency is low when in use. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a multi-head hoist for single- and double-beam cranes, which has the advantages of stable structure, not prone to slipping during use, high safety factor, and easy operation. It solves the problem that most of the existing hoists have a single structure and only use the gravity of the object itself to achieve clamping. Once shaking occurs during the lifting process, causing the center of gravity of the object to change, the object may slip due to loose clamping. The clamping is unstable and has a low safety factor. In addition, it has no auxiliary functions during use, is not convenient to adjust the device according to actual use conditions, and has low efficiency during use.

[0004] (II) Technical solution The cam is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts. The cam is connected with the first movable block by the second connecting piece, and the second connecting piece is connected with the first movable block by the second connecting piece.

[0005] Preferably, the movable frame is in a U-shape after being rotated 180°, the hook column is adapted to the guide groove, and the opening of the guide groove is chamfered.

[0006] Preferably, the number of the racks is two, and the two racks are distributed in a ring array with the gear as the axis.

[0007] Preferably, the first screw is a double-thread screw with threads symmetrically distributed at both ends, the two chucks are symmetrically distributed, and gaskets made of rubber material are fixed to one end of the two chucks that are close to each other.

[0008] Preferably, auxiliary slide grooves are symmetrically provided on both sides of the upper surface of the main body, the inner side of the auxiliary slide groove is slidably connected with an auxiliary slider, the surface of the lifting box is fixedly connected with a third connecting piece, an auxiliary beam is movably connected between the third connecting piece and the auxiliary slider, and the top of the lifting box is fixedly connected with a lifting ring.

[0009] Preferably, a movable cavity is opened at the inner bottom end of the main body, and both inner ends of the movable cavity are symmetrically and movably connected with moving blocks, and the bottom ends of the two moving blocks are fixedly connected with auxiliary positioning blocks.

[0010] Preferably, the two moving blocks are symmetrically distributed, and threaded holes are provided on the inner sides of the two moving blocks.

[0011] Preferably, a second screw is rotatably connected to the inner side of the movable cavity, and the second screw has the same structure as the first screw, and both are double-thread screws.

[0012] Preferably, the second screw rod is adapted to the threaded holes on the inner sides of the two moving blocks at the same time, and one end of the second screw rod passes through the main body and is fixedly connected to a hand wheel.

[0013] (III) Beneficial effects Compared with the prior art, the present invention provides a multi-head spreader for a single-beam and double-beam crane, which has the following beneficial effects: 1. The multi-head spreader used in the single- and double-beam crane is adapted to the hook column through the guide groove. By utilizing the curved path of the guide groove, the lifting box can drive the top block and the main body to move together after the lifting box moves downward for the first time and then upward, so that the main body can be displaced. After the second downward movement and then upward movement, the hook column can be slid out from the exit end of the groove in cooperation with the step, and the reciprocating lifting can realize the lifting and lowering of the main body.

[0014] 2. The multi-head hoist used in the single- and double-beam crane is separated from the top block by the lifting box and lifted upward. Then, under the action of the main beam, the first movable block drives the rack to move, thereby rotating the gear, so that the first screw can rotate and control the two chucks to approach each other. The chucks that are close to each other can be used to clamp the objects to be hoisted so as to lift them. The transmission using the threaded rod can be more stable, and it is not easy for the objects to fall off when clamped.

[0015] 3. The multi-head spreader for the single- and double-beam crane cooperates with the auxiliary beam through the auxiliary slider on the inner side of the auxiliary slide and the third connecting piece, so that the lifting box can be more stable when lifting and lowering to avoid shaking.

[0016] 4. The multi-head spreader used in the single- and double-beam crane can drive the second screw to rotate through the hand wheel, so that the interval between the two auxiliary positioning blocks can be adjusted, and then it can be adjusted according to the size of the objects to be hoisted, so as to be more convenient in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional schematic diagram of a multi-head spreader structure for a single-beam or double-beam crane proposed by the present invention; Figure 2A cross-sectional schematic diagram of a multi-head spreader structure for a single-beam or double-beam crane proposed by the present invention; Figure 3 A schematic diagram of a multi-headed sling top block structure for a single-beam or double-beam crane proposed by the present invention; Figure 4 A cross-sectional schematic diagram of a multi-head spreader lifting box structure for a single-beam or double-beam crane proposed by the present invention; Figure 5 A schematic diagram of the connection between the rack and the gear of a multi-head spreader for a single-beam or double-beam crane proposed by the present invention; Figure 6 A schematic diagram of the connection between the first screw and the second movable block of a multi-head spreader for a single-beam or double-beam crane proposed by the present invention; Figure 7 A schematic diagram of the connection between a multi-headed sling auxiliary positioning block and a second screw rod for a single- or double-beam crane proposed by the present invention; Figure 8 A multi-head sling for a single-beam or double-beam crane proposed by the present invention Figure 2 A magnified schematic diagram of the structure of the middle A area; Fig. 9 A multi-head sling for a single-beam or double-beam crane proposed by the present invention Figure 2 A magnified schematic diagram of the structure of region B in the middle.

[0018] In the figure: 1. main body; 2. top block; 3. guide groove; 4. step; 5. lifting box; 6. first connecting piece; 7. movable frame; 8. first spring; 9. fixed column; 10. movable groove; 11. hook column; 12. second spring; 13. sliding groove; 14. first movable block; 15. second connecting piece; 16. main beam; 17. rack; 18. gear; 19. first bevel gear; 20. second bevel gear; 21. first screw; 22. second movable block; 23. chuck; 24. auxiliary slide groove; 25. auxiliary slide block; 26. third connecting piece; 27. auxiliary beam; 28. lifting ring; 29. ​​movable cavity; 30. moving block; 31. auxiliary positioning block; 32. second screw; 33. hand wheel. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-9, including a main body 1, a top block 2 is fixedly connected to the middle of the upper end of the main body 1, guide grooves 3 are symmetrically opened on the front and rear sides of the top block 2, a step 4 is arranged on the inner side of the guide groove 3, and the entrance end of the guide groove 3 is located on the axis of the top block 2, a lifting box 5 is movably installed on the upper end of the top block 2, a first connecting member 6 is fixedly installed on the inner upper end of the lifting box 5, a movable frame 7 is fixedly connected to the bottom end of the first connecting member 6, and the movable frame 7 is U-shaped after rotating 180°, and first springs 8 are fixedly connected to both sides of the movable frame 7, and the ends of the two first springs 8 that are away from each other are fixedly connected to the lifting box 5, and fixed columns 9 are fixedly connected to the bottom ends of both sides of the movable frame 7, and a movable groove 10 is opened on the inner side of the fixed column 9, and a hook column 11 is movably installed on the inner side of the movable groove 10, and the hook column 11 is adapted to the guide groove 3, the opening of the guide groove 3 is chamfered, the inner end of the hook column 11 is fixedly connected with a second spring 12, the other end of the second spring 12 is fixedly connected to the inner wall of the fixed column 9, the upper end surface of the main body 1 is symmetrically provided with sliding grooves 13, the inner sides of the two sliding grooves 13 are slidably connected with a first movable block 14, the two sides of the lifting box 5 are fixedly connected with a second connecting member 15, the second connecting member 15 and the first movable block 14 are movably connected with a main beam 16, one side of the bottom end of the first movable block 14 is fixedly connected with a rack 17, the inner middle part of the main body 1 is rotatably connected with a gear 18, the number of the racks 17 is two, the two racks 17 are distributed in a ring array with the gear 18 as the axis, and the bottom end of the gear 18 is fixedly connected with a first helical gear Wheel 19, a sliding cavity is provided on the inner side of the main body 1, and a first screw 21 is rotatably connected to the inner side of the sliding cavity. The first screw 21 is a double-threaded screw with threads symmetrically distributed at both ends. The middle part of the first screw 21 passes through and is fixedly connected with a second bevel gear 20, and the second bevel gear 20 is meshed with the first bevel gear 19. Both ends of the first screw 21 pass through and are threadedly connected with second movable blocks 22. The bottom ends of the two second movable blocks 22 are fixedly connected with chucks 23, and the two chucks 23 are symmetrically distributed. The ends of the two chucks 23 close to each other are fixed with gaskets made of rubber material. Auxiliary slide grooves 24 are symmetrically opened on both sides of the upper surface of the main body 1, and the inner side of the auxiliary slide groove 24 is slidably connected with an auxiliary slider 25. The surface of the lifting box 5 is fixedly connected There is a third connecting member 26, and an auxiliary beam 27 is movably connected between the third connecting member 26 and the auxiliary sliding block 25. A lifting ring 28 is fixedly connected to the top of the lifting box 5. A movable cavity 29 is opened at the inner bottom end of the main body 1, and both ends of the inner side of the movable cavity 29 are symmetrically and movably connected with moving blocks 30. The bottom ends of the two moving blocks 30 are fixedly connected with auxiliary positioning blocks 31. The two moving blocks 30 are symmetrically distributed, and threaded holes are opened on the inner sides of the two moving blocks 30. The inner side of the movable cavity 29 is rotatably connected with a second screw rod 32. The second screw rod 32 has the same structure as the first screw rod 21, and both are double-threaded screws. The second screw rod 32 is adapted to the threaded holes on the inner sides of the two moving blocks 30 at the same time. One end of the second screw rod 32 passes through the main body 1 and is fixedly connected with a hand wheel 33.

[0021] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0022] When in use, the guide slot 3 is adapted to the hook column 11, and the curved path of the guide slot 3 is utilized, so that after the lifting box 5 moves downward for the first time and then moves upward, the lifting box 5 can drive the top block 2 to move together with the main body 1, so that the main body 1 can be displaced. After the second downward movement and then upward movement, the hook column 11 can be slid out from the outlet end of the slot 3 in cooperation with the step 4, and the reciprocating lifting can realize the lifting and lowering of the main body 1. After the lifting box 5 is separated from the top block 2 and lifted upward, the first movable block 14 drives the rack 17 to move under the action of the main beam 16, so that the gear 18 rotates, so that the first screw 21 The two clamps 23 are rotated and controlled to approach each other. The clamps 23 that are close to each other can be used to clamp the objects that need to be hoisted so as to lift them. The transmission by the threaded rod can be more stable, and it is not easy for the objects to fall off when clamped. The auxiliary slider 25 on the inner side of the auxiliary slide groove 24 cooperates with the third connecting piece 26 and the auxiliary beam 27, so that the lifting box 5 can be more stable when it is lifted and lowered to avoid shaking. The hand wheel 33 can drive the second screw rod 32 to rotate, so that the interval between the two auxiliary positioning blocks 31 can be adjusted, and then it can be adjusted according to the size of the objects to be hoisted, so that it is more convenient to use.

[0023] In summary, the multi-head sling for the single- and double-beam crane can lift the lifting box 5 through the lifting ring 28, and the hook column 11 cooperates with the guide groove 3, so that the top block 2 and the lifting box 5 can be lifted together, and then the main body 1 at the bottom of the top block 2 can be lifted, so that the entire device can be lifted for displacement. After the device is moved to the object to be hoisted, it is put down. After the lifting box 5 moves downward due to gravity, the hook column 11 will move to the other end of the guide groove 3 under the action of the step 4. At this time, the second handwheel 33 can be driven by manually rotating the handwheel 33. The screw rod 32 rotates, so that the positions of the two auxiliary positioning blocks 31 can be adjusted by controlling the two moving blocks 30 to approach or move away, so that they are adapted to the objects to be hoisted, so that it is more convenient to hoist the same type of objects next time. After the adjustment is completed, the lifting box 5 is lifted up again. At this time, the hook column 11 will slide out from the outlet end of the guide groove 3. After sliding out, the movable frame 7 will automatically reset under the action of the first spring 8 so that the movable frame 7 corresponds to the inlet end position of the guide groove 3. When the lifting box 5 moves upward, it will pull the main beam 16, so that the two main beams The bottom ends of 16 are pulled closer to each other, and at the same time, the first movable block 14 and the rack 17 at its bottom are driven to slide inside the sliding groove 13. The sliding rack 17 is meshed with the gear 18, thereby driving the gear 18 to rotate. The gear 18 can drive the first bevel gear 19 to rotate and mesh with the second bevel gear 20, and the direction of power transmission can be changed while transmitting, thereby driving the first screw rod 21 to rotate. The rotation of the first screw rod 21 can simultaneously control the two second movable blocks 22 to drive the chuck 23 to approach each other, so that the first screw rod 21 can be used to control the first movable block 22 to drive the chuck 23 to approach each other. The two close clamps 23 clamp the objects to be hoisted so that they can be hoisted and displaced after clamping. After use, as the lifting box 5 descends, the main beam 16 can be used to push the first movable block 14 to one end. With the cooperation of the rack 17, the gear 18, the first bevel gear 19 and the second bevel gear 20, the two clamps 23 can be moved away from each other, so that the objects can be placed. When the hook column 11 passes through the entrance end of the guide groove 3 again and enters the inner side of the guide groove 3, the top block 2 and the lifting box 5 can be limited again, so that they can be displaced, which is convenient for next use.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-head spreader for a single-beam or double-beam crane, comprising a main body (1), characterized in that: A top block (2) is fixedly connected to the middle of the upper end of the main body (1); guide grooves (3) are symmetrically provided on the front and rear sides of the top block (2); a step (4) is provided on the inner side of the guide groove (3); an entrance end of the guide groove (3) is located on the axis of the top block (2); a lifting box (5) is movably installed on the upper end of the top block (2); a first connecting member (6) is fixedly installed on the inner upper end of the lifting box (5); a movable frame (7) is fixedly connected to the bottom end of the first connecting member (6); both sides of the movable frame (7) are A first spring (8) is fixedly connected, and the ends of the two first springs (8) that are away from each other are fixedly connected to the lifting box (5). The bottom ends of both sides of the movable frame (7) are fixedly connected to fixed columns (9). A movable groove (10) is provided on the inner side of the fixed column (9). A hook column (11) is movably installed on the inner side of the movable groove (10). The inner side end of the hook column (11) is fixedly connected to a second spring (12). The other end of the second spring (12) is fixedly connected to the inner wall of the fixed column (9). The upper end surface of the body (1) is symmetrically provided with sliding grooves (13), the inner sides of the two sliding grooves (13) are slidably connected to the first movable blocks (14), the two sides of the lifting box (5) are fixedly connected to the second connecting members (15), the second connecting members (15) and the first movable blocks (14) are movably connected to a main beam (16), the bottom side of the first movable block (14) is fixedly connected to a rack (17), the inner middle part of the body (1) is rotatably connected to a gear (18), the gear (18) is ) is fixedly connected to the bottom end of a first bevel gear (19), a sliding cavity is provided on the inner side of the main body (1), a first screw rod (21) is rotatably connected to the inner side of the sliding cavity, a second bevel gear (20) is passed through and fixedly connected to the middle of the first screw rod (21), the second bevel gear (20) is meshed with the first bevel gear (19), both ends of the first screw rod (21) are passed through and threadedly connected to second movable blocks (22), and the bottom ends of the two second movable blocks (22) are fixedly connected to chucks (23).

2. A multi-head spreader for a single-beam or double-beam crane according to claim 1, characterized in that: The movable frame (7) is in a U-shape after being rotated 180 degrees, the hook column (11) is matched with the guide groove (3), and the opening of the guide groove (3) is chamfered.

3. The multi-head spreader for a single-beam or double-beam crane according to claim 1, characterized in that: The number of the racks (17) is two, and the two racks (17) are distributed in a ring array with the gear (18) as an axis.

4. The multi-head spreader for single-beam and double-beam cranes according to claim 1, characterized in that: The first screw (21) is a double-thread screw with threads symmetrically distributed at both ends. The two chucks (23) are symmetrically distributed, and gaskets made of rubber material are fixed to the ends of the two chucks (23) that are close to each other.

5. The multi-head spreader for single-beam and double-beam cranes according to claim 1, characterized in that: Auxiliary slide grooves (24) are symmetrically provided on both sides of the upper surface of the main body (1), and an auxiliary sliding block (25) is slidably connected to the inner side of the auxiliary slide groove (24). A third connecting member (26) is fixedly connected to the surface of the lifting box (5), and an auxiliary beam (27) is movably connected between the third connecting member (26) and the auxiliary sliding block (25). A lifting ring (28) is fixedly connected to the top of the lifting box (5).

6. The multi-head spreader for single-beam and double-beam cranes according to claim 1, characterized in that: The inner bottom end of the main body (1) is provided with an active cavity (29), both inner ends of the active cavity (29) are symmetrically and movably connected to movable blocks (30), and the bottom ends of the two movable blocks (30) are fixedly connected to auxiliary positioning blocks (31).

7. The multi-head spreader for single-beam and double-beam cranes according to claim 6, characterized in that: The two moving blocks (30) are symmetrically distributed, and threaded holes are provided on the inner sides of the two moving blocks (30).

8. The multi-head spreader for single-beam and double-beam cranes according to claim 7, characterized in that: A second screw (32) is rotatably connected to the inner side of the movable cavity (29); the second screw (32) has the same structure as the first screw (21), and both are double-thread screws.

9. The multi-head spreader for single-beam and double-beam cranes according to claim 8, characterized in that: The second screw rod (32) is adapted to the threaded holes on the inner sides of the two moving blocks (30) at the same time; one end of the second screw rod (32) passes through the main body (1) and is fixedly connected to a hand wheel (33).

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