Lightweight #-shaped lifting appliance

Abstract

The utility model discloses a lightweight lifting appliance shaped like a Chinese character'jing ', which mainly solves the problems of large occupied space, heavy weight, complicated operation, low production efficiency and poor safety of the existing lifting appliance. The hoisting device comprises spandrel girders (1), middle girders (2), hoisting blocks (3) and locking structures (4), the spandrel girders and the middle girders are each of a hollow double-beam lightweight structure, the two spandrel girders are perpendicularly fixed to the two ends of the two parallel middle girders to form a #-shaped structure, and the hoisting blocks are fixed to the two ends of the spandrel girders and used for installing a sling and bearing the weight of a box body; the locking structure is installed on one side of a hoisting block at the two ends of a bearing beam and used for being matched with the position of a hoisted box. And a pull pin (5) is fixed beside the locking structure and is used for being matched with the hoisting block to prevent the hoisted box body from slipping off. The lifting appliance is light in weight, good in stability, low in cost, convenient to carry, disassemble and maintain, high in universality and capable of being used for lifting heavy box bodies.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical structures, and in particular relates to a tic-tac-toe sling which can be used for lifting a heavy box. Background Art

[0002] For some heavy equipment such as equipment boxes weighing several tons, they are lifted with the help of auxiliary components such as ropes, slings, and spreaders in daily operations. They need to be lifted frequently when used in daily dock storage warehouses and other working conditions. The ship is slippery during daily operations. This method requires auxiliary equipment such as spreaders to be safe, light, and easy to disassemble and carry during the loading, unloading and transshipment process.

[0003] Patent document with application number CN202323259553.2 discloses a movable large-scale balance beam sling, such as Figure 1 As shown. A lifting lug 2 is arranged above the crossbeam 1 of the sling, a transfer pin 3 is located inside the crossbeam 1, a universal swivel hook 4 and an adjustment assembly 5 are arranged, a universal wheel 6 and a fixed wheel 7 are arranged on the outer ring of the bearing seat, and a telescopic traction rod 9 is arranged on the end of the crossbeam 1 away from the fixed wheel. The overall structure size of the sling is large, and it is a single crossbeam. When using a single crossbeam, the single lifting point of the single crossbeam needs to adjust the position of the hoisted object on the crossbeam to achieve balance. The structure is unevenly stressed, and the hook has no locking mechanism, which is poor in safety.

[0004] Patent document with application number CN202223523135.5 discloses a movable large-scale balance beam sling, such as Figure 2 As shown. The two longitudinal beams 1 of the sling are parallel to each other, the longitudinal beam 1 and the cross beam 2 are welded vertically to each other, the lifting bolts are inserted into the lifting holes 3, and the reinforcing plate 4 is connected to the hook as a whole. This structure in which the longitudinal beam 1 and the cross beam 2 are welded as one cannot be disassembled, occupies a large space, and can only be carried by the lifting hole on the upper part of the cross beam 2. The heavy weight is not convenient for manual handling and packing.

[0005] In the prior art, bow-shaped shackles and ropes are often used to directly fix the box body. The binding ropes are relatively complicated and it is inconvenient to untie the ropes during the disassembly process, which takes a lot of time and results in low production efficiency. The integral structure adopted by it occupies a large space and is heavy, which is not convenient for manual removal from the tool box. It adopts a crossbeam sling hanging form, the connection is easy to shake, the lifting force is unevenly distributed, and is not conducive to the stability of the overall lifting structure. Utility Model Content

[0006] The purpose of the utility model is to provide a lightweight tic-tac-toe sling to address the deficiencies of the above-mentioned prior art, so as to improve the safety and reliability of lifting heavy boxes, ensure its stability and safety during movement, and enable rapid disassembly of various components for packing after use, thereby improving work efficiency.

[0007] The key technology to achieve the purpose of this utility model is: designing a symmetrical overall structure to enhance the safety of the sling, preventing shaking and slipping with the box through the connection of the locking structure, and realizing the rapid assembly and disassembly of each part through the split connection mode of each component, thereby improving work efficiency. Its overall structure is as follows:

[0008] A lightweight tic-tac-toe sling, comprising a load-bearing beam, an intermediate beam, a lifting block and a locking structure, characterized in that:

[0009] The load-bearing beam and the middle beam both adopt a hollow double-root lightweight structure. The two load-bearing beams are vertically fixed at the two ends of two mutually parallel middle beams to form a tic-tac-toe structure to reduce the weight of the sling and improve its stability;

[0010] The hoisting blocks are fixed at both ends of the load-bearing beam and are used to install the slings and bear the weight of the box;

[0011] The locking structure is installed on one side of the lifting blocks at both ends of the load-bearing beam, and is used to cooperate with the lifting position of the box. A pull pin is fixed next to the locking structure, which is used to cooperate with the lifting block to prevent the lifted box from slipping.

[0012] Furthermore, the upper and lower end surfaces of the lifting block are fixedly connected to the load-bearing beam, and a lifting ear and a through hole are provided on the upper part. The lifting ear is connected to the external lifting rope, and a slot is provided at the bottom of the through hole for installing a locking structure.

[0013] Furthermore, the locking structure includes a load-bearing bolt and a locking nut, the upper end of which cooperates with the locking nut for locking, and the lower end of the load-bearing bolt cooperates with the slot of the lifting block to prevent rotation.

[0014] Furthermore, the pull pin includes a base, a spring and a central axis. The base is fixedly connected to the bottom surface of the load-bearing beam. When the pull pin is in a state of waiting to be hoisted, the central axis rises, and when the pull pin is in a state of hoisting, the central axis extends.

[0015] Furthermore, the ratio of the width to the height of the cross section of the load-bearing beam is 3:5. It is composed of two concave shells fixedly connected together to form a square cavity structure load-bearing beam body, and a plate profile with a thickness of 2 to 3 mm is selected.

[0016] Furthermore, the distance between the two middle beams (2) is 600-750 mm to ensure uniform stress of the overall structure, and a seamless tube profile with a wall thickness of 2-3 mm and a diameter of 30-40 mm is selected.

[0017] Furthermore, the lifting block is made of forged steel with a yield strength greater than 610 MPa, and the locking structure is made of a material with a yield strength greater than 800 MPa.

[0018] Compared with the existing results, the utility model has the following beneficial effects:

[0019] Firstly, the utility model adopts a split overall design structure, and each component has a simple structure, which is convenient for assembly and transportation, and can be quickly disassembled and packed after use, thereby improving work efficiency.

[0020] Secondly, since the utility model adopts a symmetrical overall structure, there is no need to adjust the position of the hanging object on the beam to achieve the balance of the overall structure during use. The use of a locking mechanism ensures a reliable connection to prevent slipping, and the criss-cross structure ensures that each part is evenly stressed, thereby enhancing safety of use and service life.

[0021] Thirdly, the load-bearing beam and the middle beam of the utility model both adopt a hollow double-root lightweight structure, which greatly reduces the overall weight and improves ergonomics. Therefore, the sling has obvious advantages in convenience, safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the patent structure with application number CN202323259553.2;

[0023] Figure 2 It is a schematic diagram of the patent structure with application number CN202223523135.5;

[0024] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 4 It is a cross-sectional view of the load-bearing beam in the utility model;

[0026] Figure 5 It is the front view of the middle beam in the utility model;

[0027] Figure 6 It is the front view of the load-bearing beam in the utility model;

[0028] Figure 7 It is a cross-sectional view of the lifting block in the utility model;

[0029] Figure 8 It is the front view of the pull pin in the utility model;

[0030] Fig. 9 It is a top view of the lifting state in the utility model;

[0031] Fig.10 It is a left view of the utility model in the lifting state;

[0032] Fig.11 This is a top view of the utility model in an unsuspended state;

[0033] Fig.12 It is a left view of the utility model in an unsuspended state.

[0034] In the figure, 1-load-bearing beam, 2-middle beam, 3-lifting block, 4-locking structure, 5-pull pin, 11-shell, 12-bayonet pin, 13-sleeve, 14-sealing plate, 15-threaded hole, 16-square hole, 17-rectangular hole, 18-round hole, 19-through hole, 21-seamless steel pipe, 22-guide joint, 31-lifting ear, 32-through hole, 33-slot, 34-weight-reducing hole, 35-weight-reducing slot, 41-load-bearing bolt, 42-locking nut, 51-base, 52-spring, 53-center axis. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0036] Reference Figure 3 The lightweight tic-tac-toe sling of this example includes two load-bearing beams 1 and two middle beams 2. The two middle beams 2 are placed in parallel. The two load-bearing beams 1 are vertically installed at the two ends of the two middle beams 2, and they form a tic-tac-toe sling structure with the middle beams 2 to ensure the symmetry and stability of the overall structure. The load-bearing beam 1 adopts a hollow trough structure with a width-to-height ratio of 3:5. It is processed with Q235 steel plates with a thickness of 2 to 3 mm to reduce the overall weight of the sling. Lifting blocks 3 are symmetrically fixedly installed at both ends of each load-bearing beam to ensure the balance of the two ends of the load-bearing beam 1. A locking structure 4 is fixedly installed on one side of each lifting block 3 to prevent the hoisted box from slipping and ensure the uniformity of the overall force during the hoisting process. A pull pin 5 is fixedly installed on the other side of the locking structure 4 to ensure a reliable connection between the sling and the box, thereby enhancing the safety of the use of the sling.

[0037] Reference Figure 4 and Figure 5The load-bearing beam 1 includes two concave shells 11, a bayonet 12, a sleeve 13, and a sealing plate 14. The two concave shells 11 are fixedly connected to form a square cavity structure load-bearing beam body. A threaded hole 15 is provided on the upper end surface of the load-bearing beam body. Square holes 16 are provided at both ends of the upper end surface, and the square holes penetrate to the lower end surface. A rectangular hole 17 and a round hole 18 are provided in the middle of the threaded hole 15 and the square hole 16. The rectangular hole 17 penetrates to the lower end surface, and the round hole 18 penetrates the upper and lower end surfaces of the load-bearing beam body. A through hole 19 is provided on the inner side surface of the load-bearing beam body and penetrates to the other side surface. The bayonet 12 is installed in the threaded hole 15 on the upper end surface of the load-bearing beam for easy disassembly and maintenance. The sleeve 13 is vertically fixedly installed in the side through hole 19 of the load-bearing beam body. The sealing plate 14 is fixedly connected to both ends of each load-bearing beam body to prevent the internal structure of the load-bearing beam 1 from rusting.

[0038] Reference Figure 6 The intermediate beam 2 includes a single seamless steel tube 21 of a cavity type and two guide joints 22. Each guide joint 22 is provided with a wedge-shaped guide structure 221 and a slot 222. The two guide joints 22 are respectively inserted into the sleeve 13 of the load-bearing beam. The width of the slot 222 matches the shaft diameter of the bayonet 12. The bayonet shaft is in an extended state in its natural state. The bayonet can be retracted by pulling the bayonet. When the intermediate beam 2 is inserted into the sleeve of the load-bearing beam 1, the bayonet 12 limits the guide joint 22 from coming out of the sleeve 13, thereby ensuring a reliable connection between the intermediate beam and the load-bearing beam. The material of the intermediate beam 2 is a seamless tube profile with a wall thickness of 2 to 3 mm and a diameter of 30 to 40 mm. The spacing between the two intermediate beams is 600 to 750 mm. The tic-tac-toe structure formed by the connection with the load-bearing beam has good anti-overturning performance, ensuring the uniformity of the force of the overall structure.

[0039] Reference Figure 7 The lifting block 3 is provided with a lifting lug 31 and a through hole 32 on its upper part. The lifting lug 31 is symmetrically fixedly installed in the rectangular hole 17 on the upper end surface of the load-bearing beam in the outer direction of the load-bearing beam and is connected to the external sling; a slot 33 is provided at the bottom of the through hole 32 for installing the locking structure 4. The lifting block 3 is also provided with a weight-reducing hole 34 and a bottom weight-reducing groove 35 to further reduce the overall weight of the load-bearing beam. It is the main force transmission component and is made of forged steel with a yield strength greater than 610 MPa.

[0040] The locking structure 4 is fixedly installed in the circular hole 18 of the main body of the load-bearing beam, and includes a load-bearing bolt 41 and a locking nut 42. The upper end of the load-bearing bolt 41 is connected to the locking nut 42, and the lower end thereof is matched and connected with the large hole of the box body lifting seat, and a guiding wedge structure is provided to play a guiding connection role. A protrusion is provided in the middle position, and the protrusion cooperates with the card slot 33 to prevent the load-bearing bolt 41 from rotating and loosening in the through hole 32. The locking structure 4 is the main load-bearing component, and the material is selected from round steel profiles with a yield strength greater than 800 MPa.

[0041] Reference Figure 4 and Figure 8 The pull pin 5 includes a base 51, a spring 52 and a center axis 53. The pull pin 5 is symmetrically fixedly installed in the square holes 16 at both ends of the load-bearing beam 1. The base 51 is fixedly connected to the lower end surface of the load-bearing beam 1 as a whole. A Γ-shaped slide rail is provided on the circumferential surface of the base. During the stretching and rotating process of the center axis 53, the protrusion on the center axis 53 moves along the Γ-shaped hole. When the protrusion is at the bottom of the Γ-shaped slide rail, the center axis 53 is in an extended state. When the protrusion is at the top of the Γ-shaped slide rail, the center axis 53 is in a retracted state.

[0042] The actual usage structure of this example is installed as follows:

[0043] Place two load-bearing beams 1 in parallel, insert the guide joints 22 at both ends of the middle beam 2 into the sleeves 13 of the load-bearing beam 1. During the assembly process, the axis of the bayonet 12 is inserted into the slot of the guide joint 22, and the four guide joints 22 of the middle beam are inserted in sequence, so that the load-bearing beam and the middle beam are constructed into a well-shaped shape. Place the well-connected sling on the top of the box, and drop the lower end of the load-bearing bolt 41 into the large end of the box hoisting seat hole. At this time, the locking structure 4 is in an unlocked state, as shown in FIG. Fig. 9 and Fig.10 shown.

[0044] Move the hoist forward as a whole in the direction indicated by the arrow on the box, so that the hoist moves from the large end of the hoisting seat hole to the small end, rotate the pull pin 5 to extend its shaft to ensure that it enters the small hole of the hoisting seat of the box, adjust the load-bearing bolt 41 and tighten the locking nut 42 to ensure that the hoisted box and the hoist are level, stable and safe as a whole during lifting. When unlocking, place the box stably and rotate the pull pin 5 to retract the center axis. Fig.11 and Fig.12 shown.

[0045] Adjust the locking nut 42 to loosen it, push the entire sling from the small end of the lifting seat hole to the large end, and choose to repeat lifting or disassembly according to actual working conditions.

[0046] Repeat the above operation to achieve repeated lifting. When disassembling, it is necessary to first stretch the latch 5 to loosen the middle beam 2 from the sleeve 13 of the load-bearing beam 1, and disassemble the overall structure of the sling into two load-bearing beams 1 and two middle beams 2, which are manually moved from the upper end surface of the box to the horizontal plane for packing.

[0047] This example has a light overall mass, is easy and flexible to disassemble and assemble, is convenient and safe to use, and reduces manual labor intensity. Its symmetrical slings and lightweight overall structure ensure uniform force, safety and stability during use.

[0048] The rated lifting weight of the sling in this example is not more than 5000kg. The applicable lifting speed under full load is no more than 6m / min in translation speed, and no more than 4.5m / min in ascending and descending speed. When the sling is lifting the box, it must be operated by 2 or more people.

[0049] The above description is only an implementation case of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A lightweight tic-tac-toe sling, comprising a load-bearing beam (1), an intermediate beam (2), a sling block (3) and a locking structure (4), characterized in that: The load-bearing beam (1) and the middle beam (2) both adopt a hollow double-root lightweight structure. The two load-bearing beams (1) are vertically fixed at the two ends of two mutually parallel middle beams (2) to form a tic-tac-toe structure, so as to reduce the weight of the sling and improve its stability. The lifting blocks (3) are fixed at both ends of the load-bearing beam (1) and are used to install lifting ropes and bear the weight of the box body; The locking structure (4) is installed on one side of the lifting block at both ends of the load-bearing beam (1) and is used to cooperate with the lifting position of the box body. A pull pin (5) is fixed next to the locking structure (4) and is used to cooperate with the lifting block to prevent the lifted box body from slipping.

2. The sling according to claim 1, characterized in that: The upper and lower end surfaces of the lifting block (3) are fixedly connected to the load-bearing beam, and a lifting lug (31) and a through hole (32) are provided on the upper part. The lifting lug (31) is connected to an external lifting rope, and a slot (33) is provided at the bottom of the through hole (32) for installing a locking structure (4).

3. The sling according to claim 1, characterized in that: The locking structure (4) comprises a load-bearing bolt (41) and a locking nut (42), the upper end of which cooperates with the locking nut for locking, and the lower end of the load-bearing bolt cooperates with the slot of the lifting block to prevent rotation.

4. The sling according to claim 1, characterized in that: The pull pin (5) comprises a base (51), a spring (52) and a central shaft (53); the base is fixedly connected to the bottom surface of the load-bearing beam; when the pull pin is in a waiting state, the central shaft rises; when the pull pin is in a hoisting state, the central shaft extends.

5. The sling according to claim 1, characterized in that: The ratio of width to height of the cross section of the load-bearing beam (1) is 3:

5. It is composed of two concave shells fixedly connected together to form a square cavity structure load-bearing beam body, and a plate profile with a thickness of 2 to 3 mm is selected.

6. The sling according to claim 1, characterized in that: The distance between the two middle beams (2) is 600-750 mm to ensure uniform stress of the overall structure. The seamless tube profile with a wall thickness of 2-3 mm and a diameter of 30-40 mm is selected.

7. The sling according to claim 1, characterized in that: The lifting block is made of forged steel with a yield strength greater than 610 MPa; The locking structure is made of a material with a yield strength greater than 800 MPa.

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