A multi-jaw spreader device

Abstract

The utility model discloses a kind of multi-claw hanger devices, including upper connecting seat and lower connecting seat, the middle part of the top of lower connecting seat is fixedly installed with main derrick, the middle part of main derrick and upper connecting seat is slidably connected, the top of main derrick is provided with lifting ring, the bracket integrally arranged on the outer circumferential surface of upper connecting seat is opened with upper adjusting through-hole, upper connecting seat is fixedly installed with upper connecting rod by upper adjusting through-hole and bolt, the bracket integrally arranged on the outer circumferential surface of lower connecting seat is opened with lower adjusting through-hole, lower connecting seat is rotatably connected with lower connecting rod by lower adjusting through-hole and pin rod, the other end of upper connecting rod is rotatably connected with connecting plate, the other end of lower connecting rod is rotatably connected with the middle part of connecting plate. Simple structure, easy to manufacture and maintain, reduce use cost, through upper pull lifting ring can realize claw hook's opening and folding, simple operation, high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of multi-claw lifting device technology, specifically a multi-claw lifting device. Background Technology

[0002] Currently, traditional lifting tools have the following problems when lifting and transporting cylindrical, disc-shaped, or shaft-shaped workpieces:

[0003] 1. Unstable lifting: Deep cylindrical workpieces have a high center of gravity, making it difficult to lift them stably with traditional lifting tools, which can easily lead to the workpiece shaking or falling off.

[0004] 2. Complex operation: Manual operation is complex and inefficient, especially for large or heavy deep cylindrical workpieces.

[0005] 3. Workpiece damage: The workpiece surface is easily scratched or bumped during hoisting, affecting quality.

[0006] 4. Limited gripping range: Traditional multi-claw lifting tools have fixed claw structures. Because the shape of the claws is fixed and the gripping area is fixed, the working range of the lifting tool is limited. When the area of ​​the object being lifted exceeds the gripping range of the lifting tool, the lifting tool must be replaced, which increases production costs.

[0007] 5. Poor applicability: It is difficult to adapt to deep cylindrical workpieces of different diameters. There is an eccentricity between the lifting device and the workpiece, making it difficult to achieve precise centering and clamping.

[0008] Therefore, we propose a multi-jaw lifting device. Summary of the Invention

[0009] The purpose of this utility model is to provide a multi-claw lifting device to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a multi-claw lifting device, comprising an upper connecting seat and a lower connecting seat, wherein a main lifting rod is fixedly installed at the middle of the top of the lower connecting seat, the main lifting rod is slidably connected to the middle of the upper connecting seat, a lifting ring is provided at the top of the main lifting rod, an upper adjustment through hole is opened in the bracket integrally formed on the outer circumference of the upper connecting seat, an upper connecting rod is fixedly installed on the upper connecting seat through the upper adjustment through hole and bolts, a lower adjustment through hole is opened in the bracket integrally formed on the outer circumference of the lower connecting seat, a lower connecting rod is rotatably connected to the lower connecting seat through the lower adjustment through hole and pin, a connecting plate is rotatably connected to the other end of the upper connecting rod, the other end of the lower connecting rod is rotatably connected to the middle of the connecting plate, and a ground hook is fixedly installed at the bottom of the connecting plate.

[0011] Optionally, a handle located above the anchor hook is fixedly installed on the outer side of the connecting plate. The anchor hook has an L-shaped cross-section, and a tightening screw is threaded through the middle of the connecting plate.

[0012] Optionally, a fixing ring located below the handle is fixedly installed on the outer side of the connecting plate. A protective chain is fixedly installed on the fixing ring by a hook. The two ends of the protective chain are respectively fixedly engaged with two adjacent fixing rings.

[0013] Optionally, the ends of the upper and lower connecting rods are rotatably connected to rotating seats, and the rotating seats are fixedly installed with the connecting plate.

[0014] Optionally, the bracket on the outer periphery of the upper connecting seat is provided with multiple upper adjustment holes, and the bracket on the outer periphery of the lower connecting seat is provided with multiple lower adjustment through holes, the adjustment range of the upper adjustment through holes and the lower adjustment through holes is 50-100mm.

[0015] Optionally, the main lifting rod is a fully threaded rod, the bottom of the main lifting rod is fixedly installed with the lower connecting column, a lifting spring is sleeved on the outside of the main lifting rod, and a limiting bolt located above the upper connecting seat is threadedly connected to the main lifting rod.

[0016] Optionally, the main lifting rod is threadedly connected to a spring adjusting nut located below the lifting spring, the top of the lifting spring is abutted against the bottom of the upper connecting seat, and the bottom of the lifting spring is abutted against the top of the spring adjusting nut.

[0017] Optionally, the connecting plate includes an upper connecting part rotatably connected to the upper connecting rod and the lower connecting rod. An upper positioning pin is provided at the bottom of the upper connecting part. An adjusting plate is fixedly installed at the bottom of the upper connecting part by the upper positioning pin and the fixing bolt. A plurality of positioning holes are evenly opened in the middle of the adjusting plate. A lower adjusting part is fixedly installed on the adjusting plate through the positioning holes. A lower positioning pin is provided at the top of the lower adjusting part. The lower adjusting part is fixedly installed on the adjusting plate by the lower positioning pin and the fixing bolt. The upper positioning pin and the lower positioning pin are respectively inserted into the positioning holes of the adjusting plate. The two adjusting plates are symmetrically arranged on both sides of the upper connecting part and the lower adjusting part.

[0018] Optionally, a tightening screw is threaded through the middle of the connecting plate.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This multi-claw lifting device, with its upper and lower connecting seats, is slightly retracted before use due to the lifting ring being raised and supported by the compression resistance of the lifting spring. During use, the three symmetrical foot hooks retract and hook onto the bottom edge of the workpiece to achieve lifting. The compression of the lifting spring can be adjusted by the cooperation of the limit bolts and adjusting nuts to accommodate workpieces of different weights and ensure a stable lifting process.

[0021] 2. This multi-claw lifting device, by setting up upper and lower adjustment through holes, designs the upper and lower connecting seats as adjustable structures. By adjusting the position of the fixing bolts or pins, the exposed length of the upper and lower connecting rods can be adjusted, thereby changing the distance between the connecting plates and thus changing the opening degree of the foot gripper hooks to adapt to workpieces of different diameters. Grabbing can be achieved by adjusting the opening degree of the foot gripper hooks.

[0022] 3. The multi-claw lifting device has an adjustable connecting plate. By adjusting the lower positioning pin at the top of the lower adjustment part and inserting it into the positioning holes at different heights on the adjustment plate, the distance between the bottom foot hook of the lower adjustment part and the upper connecting part can be adjusted, so that the foot hook can adapt to the gripping and lifting of workpieces of different heights.

[0023] 4. This multi-claw lifting device, by setting up a protective chain and a clamping screw, after the foot hook grips the object being lifted, the two ends of the protective chain are respectively fixed to the fixing rings on the adjacent connecting plates. The protective chain prevents the foot hook from loosening, thereby avoiding the safety hazard caused by the connecting plates opening. At the same time, the clamping screw set in the middle of the connecting plate is adjusted after the foot hook grips the object being lifted, so that the clamping screw is pressed against the surface of the object being lifted, preventing the multi-layered spliced ​​objects from shifting during the lifting process. It is suitable for gripping and lifting multi-layered spliced ​​parts. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a multi-claw lifting device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the upper and lower connecting seats of a multi-claw lifting device according to the present invention;

[0026] Figure 3 This is a schematic diagram of the main lifting rod of a multi-claw lifting device according to the present invention;

[0027] Figure 4 This is a schematic diagram of the connecting plate of a multi-claw lifting device according to the present invention.

[0028] In the diagram: 1. Upper connecting seat; 2. Lower connecting seat; 3. Main lifting rod; 4. Connecting plate; 401. Upper connecting part; 402. Lower adjusting part; 403. Upper positioning pin; 404. Lower positioning pin; 405. Adjusting plate; 406. Positioning hole; 5. Upper connecting rod; 6. Lower connecting rod; 7. Rotating seat; 8. Lifting ring; 9. Anchor hook; 10. Handle; 11. Fixing ring; 12. Protective chain; 13. Lifting spring; 14. Spring adjusting nut; 15. Limit bolt; 16. Upper adjusting through hole; 17. Lower adjusting through hole; 18. Tightening screw. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] Please see Figures 1 to 3 This utility model provides a multi-claw lifting device, including an upper connecting seat 1 and a lower connecting seat 2. A main lifting rod 3 is fixedly installed at the middle of the top of the lower connecting seat 2. The main lifting rod 3 is slidably connected to the middle of the upper connecting seat 1. A lifting ring 8 is provided at the top of the main lifting rod 3. An upper adjustment through hole 16 is opened on the bracket integrally formed on the outer circumference of the upper connecting seat 1. An upper connecting rod 5 is fixedly installed on the upper connecting seat 1 through the upper adjustment through hole 16 and bolts. A lower adjustment through hole 17 is opened on the bracket integrally formed on the outer circumference of the lower connecting seat 2. A lower connecting rod 6 is rotatably connected to the lower connecting seat 2 through the lower adjustment through hole 17 and pin. A connecting plate 4 is rotatably connected to the other end of the upper connecting rod 5. The other end of the lower connecting rod 6 is rotatably connected to the middle of the connecting plate 4. A ground hook is fixedly installed at the bottom of the connecting plate 4.

[0032] A handle 10 is fixedly installed on the outside of the connecting plate 4 above the foot catch hook 9, and the foot catch hook 9 has an L-shaped cross-section.

[0033] The upper connecting rod 5 and the lower connecting rod 6 are rotatably connected to a rotating seat 7, which is fixedly installed with the connecting plate 4.

[0034] The bracket on the outer periphery of the upper connecting seat 1 has multiple upper adjustment holes, and the bracket on the outer periphery of the lower connecting seat 2 has multiple lower adjustment through holes 17. The adjustment range of the upper adjustment through holes 16 and the lower adjustment through holes 17 is 50-100mm. By setting the upper adjustment through holes 16 and the lower adjustment through holes 17, the upper connecting seat 1 and the lower connecting seat 2 are designed as adjustable structures. By adjusting the position of the fixing bolts or pins, the exposed length of the upper connecting rod 5 and the lower connecting rod 6 can be adjusted, thereby changing the distance between the connecting plates 4 and thus changing the opening degree of the foot gripper hook 9 to adapt to cylindrical workpieces of different diameters. Grabbing can be achieved by adjusting the opening degree of the foot gripper hook 9. The multi-claw design can avoid scratches or bumps on the workpiece surface caused by traditional hooks, and is especially suitable for workpieces with high surface quality requirements. The structure is simple, easy to manufacture and maintain, and reduces the cost of use. The claw hook can be opened and closed by pulling the lifting ring 8, which is simple to operate and highly efficient.

[0035] Example 2

[0036] Based on Embodiment 1, the main lifting rod 3 is a fully threaded rod. The bottom of the main lifting rod 3 is fixedly installed with the lower connecting column. A lifting spring 13 is sleeved on the outside of the main lifting rod 3. The main lifting rod 3 is threadedly connected with a limiting bolt 15 located above the upper connecting seat 1.

[0037] The main lifting rod 3 is threadedly connected to a spring adjusting nut 14 located below the lifting spring 13. The top of the lifting spring 13 is pressed against the bottom of the upper connecting seat 1, and the bottom of the lifting spring 13 is pressed against the top of the spring adjusting nut 14. By adjusting the limiting bolt 15 and the spring adjusting nut 14, the lifting force of the lifting spring 13 on the upper connecting seat 1 can be changed. At the same time, the limiting bolt 15 limits the upper connecting seat 1 to limit the opening degree of the foot hook 9 at the bottom of the connecting plate 4, so as to ensure that it can adapt to workpieces of different weights. Before use, the multi-claw lifting device is slightly retracted due to the lifting ring 8 being raised and supported by the compression resistance of the lifting spring 13. When in use, place the retracted multi-claw lifting device at the bottom edge of the insulation cylinder, and use the handle 10 on the connecting plate 4 for auxiliary positioning. Pull up the lifting ring 8, the main lifting rod 3 moves up, causing the lower connecting seat 2 to move up, and the lower connecting rod 6 rotates, causing the connecting plate 4 to retract, retracting the three symmetrical foot hooks 9 until the foot hooks 9 hook onto the bottom edge of the cylinder, thus achieving lifting. It can stably grip cylindrical workpieces, ensuring a smooth lifting process and preventing them from falling off.

[0038] Example 3

[0039] Based on Embodiment 2, a fixing ring 11 located above the anchor hook 9 is fixedly installed on the outside of the connecting plate 4. The fixing ring 11 is fixedly installed with a protective chain 12 by a hook. The two ends of the protective chain 12 are respectively fixedly engaged with two adjacent fixing rings 11. After the anchor hook grips the hoisted item, the two ends of the protective chain 12 are fixed to the fixing rings 11 on the adjacent connecting plate 4. The protective chain 12 prevents the anchor hook from loosening, thereby avoiding the safety hazard of the hoisted item falling off due to the opening of the connecting plate 4.

[0040] Example 4

[0041] Based on embodiment 3, the connecting plate 4 includes an upper connecting part 401 rotatably connected to the upper connecting rod 5 and the lower connecting rod 6. An upper positioning pin 403 is provided at the bottom of the upper connecting part 401. An adjusting plate 405 is fixedly installed at the bottom of the upper connecting part 401 via the upper positioning pin 403 and fixing bolts. Multiple positioning holes 406 are evenly distributed in the middle of the adjusting plate 405. A lower adjusting part 402 is fixedly installed on the adjusting plate 405 through the positioning holes 406. A lower positioning pin 404 is provided at the top of the lower adjusting part 402. The lower adjusting part 402 is connected to the fixing bolts via the lower positioning pin 404. The upper positioning pin 403 and the lower positioning pin 404 are fixedly installed with the adjusting plate 405 and respectively inserted into the positioning hole 406 of the adjusting plate 405. The two adjusting plates 405 are symmetrically arranged on both sides of the upper connecting part 401 and the lower adjusting part 402. The connecting plate 4 is set as an adjustable structure. By adjusting the lower positioning pin 404 at the top of the lower adjusting part 402 to be inserted into the positioning hole 406 at different heights on the adjusting plate 405, the distance between the bottom foot hook of the lower adjusting part 402 and the upper connecting part 401 can be adjusted, so that the foot hook can adapt to the gripping and lifting of workpieces of different heights.

[0042] Example 5

[0043] Based on embodiment 3, a tightening screw 18 is threaded through the middle of the connecting plate 4. The tightening screw 18 located in the middle of the connecting plate 4 is adjusted after the ground hook grips the hoisted item, so that the tightening screw 18 is pressed against the surface of the hoisted item, preventing the multi-layer spliced ​​object from shifting during hoisting. It is applicable to the gripping and hoisting of multi-layer spliced ​​parts.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-claw lifting device, comprising an upper connecting seat (1) and a lower connecting seat (2), characterized in that, The main lifting rod (3) is fixedly installed in the middle of the top of the lower connecting seat (2). The main lifting rod (3) is slidably connected to the middle of the upper connecting seat (1). The top of the main lifting rod (3) is provided with a lifting ring (8). The bracket integrally provided on the outer circumference of the upper connecting seat (1) has an upper adjustment through hole (16). The upper connecting seat (1) is fixedly installed with an upper connecting rod (5) through the upper adjustment through hole (16) and bolts. The bracket integrally provided on the outer circumference of the lower connecting seat (2) has a lower adjustment through hole (17). The lower connecting seat (2) is rotatably connected with a lower connecting rod (6) through the lower adjustment through hole (17) and pin. The other end of the upper connecting rod (5) is rotatably connected with a connecting plate (4). The other end of the lower connecting rod (6) is rotatably connected to the middle of the connecting plate (4). The bottom of the connecting plate (4) is fixedly installed with a ground hook (9).

2. The multi-claw lifting device according to claim 1, characterized in that, A handle (10) is fixedly installed on the outside of the connecting plate (4) above the foot catch (9), and the cross-section of the foot catch (9) is L-shaped.

3. The multi-claw lifting device according to claim 1, characterized in that, A fixing ring (11) located above the foot catch hook (9) is fixedly installed on the outer side of the connecting plate (4). A protective chain (12) is fixedly installed on the fixing ring (11) by means of a hook. The two ends of the protective chain (12) are respectively fixedly engaged with two adjacent fixing rings (11).

4. The multi-claw lifting device according to claim 1, characterized in that, The upper connecting rod (5) and the lower connecting rod (6) are rotatably connected to a rotating seat (7), and the rotating seat (7) is fixedly installed with the connecting plate (4).

5. A multi-claw lifting device according to claim 4, characterized in that, The bracket on the outer periphery of the upper connecting seat (1) is provided with multiple upper adjustment holes, and the bracket on the outer periphery of the lower connecting seat (2) is provided with multiple lower adjustment through holes (17). The adjustment range of the upper adjustment through holes (16) and the lower adjustment through holes (17) is 50-100mm.

6. The multi-jaw lifting device according to claim 1, characterized in that, The main lifting rod (3) is a fully threaded rod. The bottom of the main lifting rod (3) is fixedly installed with the lower connecting column. The main lifting rod (3) is fitted with a lifting spring (13). The main lifting rod (3) is threadedly connected with a limiting bolt (15) located above the upper connecting seat (1).

7. A multi-claw lifting device according to claim 1, characterized in that, The main lifting rod (3) is threadedly connected to a spring adjusting nut (14) located below the lifting spring (13). The top of the lifting spring (13) is pressed against the bottom of the upper connecting seat (1), and the bottom of the lifting spring (13) is pressed against the top of the spring adjusting nut (14).

8. A multi-claw lifting device according to claim 1, characterized in that, The connecting plate (4) includes an upper connecting part (401) rotatably connected to the upper connecting rod (5) and the lower connecting rod (6). An upper positioning pin (403) is provided at the bottom of the upper connecting part (401). An adjusting plate (405) is fixedly installed at the bottom of the upper connecting part (401) by the upper positioning pin (403) and a fixing bolt. A plurality of positioning holes (406) are evenly opened in the middle of the adjusting plate (405). The adjusting plate (405) is fixedly installed through the positioning holes (406). The lower adjustment part (402) is provided with a lower positioning pin (404) at its top. The lower adjustment part (402) is fixedly installed with the adjustment plate (405) by the lower positioning pin (404) and the fixing bolt. The upper positioning pin (403) and the lower positioning pin (404) are respectively inserted into the positioning hole (406) of the adjustment plate (405). The two adjustment plates (405) are symmetrically arranged on both sides of the upper connecting part (401) and the lower adjustment part (402).

9. A multi-claw lifting device according to claim 1, characterized in that, The connecting plate (4) is threaded through the middle and has a clamping screw (18).

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