Crank linkage self-locking hoisting device

Abstract

The application discloses a kind of crank linkage self-locking hoisting equipment, including bottom plate, one end mirror image connection has two mounting plates on the upper surface of bottom plate, the top of two mounting plates is all provided with mounting hole, first pin shaft is installed in mounting hole, hoisting plate is rotatably connected on first pin shaft, movable wing plate assembly for supporting truss rib is installed on bottom plate.The present application solves the problem that the existing hoisting tool has a single stress point during hoisting, and is prone to unbalanced stress during hoisting, which may cause cracking or even breaking of the truss concrete, posing a safety hazard.

Description

Technical Field

[0001] This invention relates to the field of truss hoisting, and more particularly to a crankshaft-linked self-locking hoisting device. Background Technology

[0002] In modern building construction, the application of precast concrete components is becoming increasingly widespread. Among them, prefabricated floor slabs have become a common choice for high-rise buildings and residential buildings due to their advantages such as fast construction speed and stable quality. Prefabricated floor slabs typically use factory-prefabricated ribbed slabs, which are usually composed of an upper chord, truss reinforcement, and a lower chord. Currently, most truss concrete slabs on the market have pre-embedded lifting rings without specialized lifting tools for this structure; a small number use lifting tools welded by the factory itself. These lifting tools have a single stress point during lifting, which can easily lead to unbalanced stress, causing cracking or even breakage of the truss concrete, posing a safety hazard. Summary of the Invention

[0003] The purpose of this invention is to overcome the existing defects and provide a crankshaft linkage self-locking hoisting device that can improve the stress points of the hoisting device and truss, ensure the balance during the hoisting process, prevent the concrete of the truss from cracking or even breaking, and reduce safety hazards.

[0004] The technical solution to achieve the above objective is: a crankshaft linkage self-locking hoisting device, including a base plate, with two mounting plates mirror-connected to one end of the upper surface of the base plate, and mounting holes provided on the top of the two mounting plates, with a first pin installed in the mounting holes, and a lifting plate rotatably connected to the first pin, and a movable wing plate assembly for supporting truss reinforcement installed on the base plate.

[0005] Preferably, the movable wing plate assembly includes two arched mounting blocks, a movable plate, two first cranks, two second pins, four limiting rods, two third pins, two second cranks, and two internal support mechanisms. Two arched mounting blocks are installed in the middle portion of the base plate, and the movable plate passes through each of the two arched mounting blocks. Two U-shaped limiting plates are connected to the upper surface of the movable plate. Two first limiting grooves are intermittently provided on the upper surface of the movable plate, and two second limiting grooves are intermittently provided on the lower surface of the movable plate. The two arched mounting blocks are slidably connected within their respective first limiting grooves. A second pin and a... are mirror-mounted on the front end of the upper surface of the base plate. The third pin, a second pin and a third pin are also mirror-mounted on the middle part of the upper surface of the base plate. One end of the first crank is rotatably connected to each second pin, and one end of the second crank is rotatably connected to each third pin. An inner support mechanism is rotatably connected to the ends of the two first cranks, and another inner support mechanism is rotatably connected to the ends of the two second cranks. A limiting rod is rotatably connected to the front ends of the two first cranks and the two second cranks. The two limiting rods located at the front end of the base plate pass through a loop-shaped limiting plate, and the two limiting rods located in the middle part of the base plate pass through another loop-shaped limiting plate.

[0006] Preferably, the two inner support mechanisms are composed of identical parts. The inner support mechanism includes a wing plate, two mounting brackets, two fourth pins, two L-shaped connecting plates, and two fifth pins. The ends of the two first cranks and the two second cranks are rotatably connected to the corresponding fourth pins. One end of the corresponding L-shaped connecting plate is also rotatably connected to each fourth pin. The other end of each L-shaped connecting plate is rotatably connected to the fifth pin. The fifth pins are mounted on the corresponding mounting brackets. The two mounting brackets are intermittently connected to the inner side of the wing plate.

[0007] Preferably, the L-shaped connecting plate is located at the lower end of the corresponding first crank or second crank.

[0008] Preferably, each of the second cranks is connected to a bushing, each bushing is rotatably connected to the corresponding third pin, the bottom of the two bushings is in contact with the base plate, and the lower bottom surface of the second crank is horizontally aligned with the upper surface of the first crank.

[0009] Preferably, the top of the hanging plate has a hanging hole.

[0010] Preferably, a third limiting groove is provided in the middle part of the front end of the base plate.

[0011] The beneficial effects of this invention are as follows: by pushing the lifting plate, the lifting plate drives the moving plate to move inward. According to the principle of crank transmission, the two wing plates open simultaneously and form a plane with the truss reinforcement. The wing plates drag the truss reinforcement on both sides for lifting. At this time, the stress point does not act on the truss concrete, thus avoiding the cracking of the truss concrete during the lifting process. The two wing plates and the truss reinforcement are at the same angle, and there are multiple stress points during the lifting process, making the stress distribution of this device more uniform and stable during the lifting process, reducing safety hazards. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention;

[0013] Figure 2 This is an exploded view of the present invention;

[0014] Figure 3 This is a front view of the invention after the suspended platform is hidden;

[0015] Figure 4 This is a schematic diagram of the invention that hides a wing plate;

[0016] Figure 5 This is a schematic diagram of the invention concealing another wing plate.

[0017] In the diagram: 1. Base plate; 2. Mounting plate; 3. First pin; 4. Hanging plate; 5. Arched mounting block; 6. Moving plate; 7. First crank; 8. Second pin; 9. Limiting rod; 10. U-shaped limiting plate; 11. First limiting groove; 12. Third pin; 13. Second crank; 14. Wing plate; 15. Mounting bracket; 16. Fourth pin; 17. L-shaped connecting plate; 18. Fifth pin; 19. Second limiting groove; 20. Bushing; 21. Third limiting groove; 22. Lifting hole. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] like Figure 1-5As shown, a crankshaft linkage self-locking hoisting device includes a base plate 1, two mounting plates 2, a first pin 3, a hoisting plate 4, and a movable wing plate assembly.

[0021] Specifically, one end of the upper surface of the base plate 1 is mirror-connected to two mounting plates 2. The top of the two mounting plates 2 is provided with mounting holes, and a first pin 3 is installed in the mounting holes. The first pin 3 serves to support the hanging plate 4. The hanging plate 4 is rotatably connected to the first pin 3. A movable wing plate assembly for supporting the truss reinforcement is installed on the base plate 1.

[0022] Specifically, the movable wing plate assembly includes two arched mounting blocks 5, a movable plate 6, two first cranks 7, two second pins 8, four limiting rods 9, two third pins 12, two second cranks 13, and two internal support mechanisms. Two arched mounting blocks 5 are installed in the middle of the base plate 1. A movable plate 6 passes through each of the two arched mounting blocks 5. Two U-shaped limiting plates 10 are connected to the upper surface of the movable plate 6. Two first limiting grooves 11 are intermittently provided on the upper surface of the movable plate 6, and two second limiting grooves 19 are intermittently provided on the lower surface of the movable plate 6. The two arched mounting blocks 5 are slidably connected to their respective first limiting grooves 11. A second pin 8 and a third pin 12 are mirror-mounted on the front end of the upper surface of the base plate 1, and a second pin 8 and a third pin 12 are also mirror-mounted in the middle of the upper surface of the base plate 1. One end of a first crank 7 is rotatably connected to each second pin 8, and a crank 7 is rotatably connected to each third pin 12. One end of the second crank 13 is connected to an internal support mechanism, and the ends of the two first cranks 7 are rotatably connected to another internal support mechanism. The front ends of the two first cranks 7 and the two second cranks 13 are each rotatably connected to a limiting rod 9. The two limiting rods 9 located at the front end of the base plate 1 pass through a loop-shaped limiting plate 10, and the two limiting rods 9 located in the middle part of the base plate 1 pass through another loop-shaped limiting plate 10. The moving plate 6 slides back and forth within the two arched mounting blocks 5. The two loop-shaped limiting plates 10 of the moving plate 6 drive the limiting rods 9 installed on the two first cranks 7 and the two second cranks 13 to move relative to or away from each other. Each limiting rod 9 can drive the two first cranks 7 and the two second cranks 13 to rotate. Since the other ends of the two first cranks 7 and the two second cranks 13 are connected to corresponding internal support mechanisms, the two internal support mechanisms can expand and contract to facilitate the support of the stirrups.

[0023] Specifically, the two internal support mechanisms are composed of identical parts. The internal support mechanism includes a wing plate 14, two mounting brackets 15, two fourth pins 16, two L-shaped connecting plates 17, and two fifth pins 18. The ends of the two first cranks 7 and the two second cranks 13 are rotatably connected to the corresponding fourth pins 16. Each fourth pin 16 is also rotatably connected to one end of the corresponding L-shaped connecting plate 17. The other end of each L-shaped connecting plate 17 is rotatably connected to the fifth pin 18. The fifth pins 18 are mounted on the corresponding mounting brackets 15. The two mounting brackets 15 are intermittently connected to the inner side of the wing plate 14. The wing plate 14 can rotate freely along the central axis of the fifth pin 18, thus accommodating stirrups at different angles.

[0024] Specifically, the L-shaped connecting plate 17 is located at the lower end of the corresponding first crank 7 or second crank 13; each second crank 13 is connected to a bushing 20, each bushing 20 is rotatably connected to the corresponding third pin 12, the bottom of the two bushings 20 is in contact with the base plate 1, and the lower bottom surface of the second crank 13 is horizontally aligned with the upper surface of the first crank 7.

[0025] Specifically, the top of the hanging plate 4 is provided with a lifting hole 22, which is used to suspend the lifting point of the crane. The middle part of the front end of the base plate 1 is provided with a third limiting groove 21, which can be used to limit the rotation angle of the hanging plate 4, thereby limiting the unfolding distance of the two wing plates 14.

[0026] Working Principle: When preparing to lift the truss concrete, first place this device in the middle of the truss reinforcement, then push the lifting plate 4 inward. At this time, the lifting plate 4 drives the moving plate 6 to move inward. According to the principle of crank transmission, the moving plate 6 drives the two first cranks 7 to rotate around the corresponding second pins 8, and at the same time, the moving plate 6 drives the two second cranks 13 to rotate around the corresponding third pins 12. In this way, the two first cranks 7 drive one wing plate 14 to move outward, and the two second cranks 13 drive the other wing plate 14 to move outward. The two wing plates 14 open at the same time and form a plane with the truss reinforcement. The wing plates 14 drag the truss reinforcement on both sides for lifting. At this time, the force point does not act on the truss concrete, so it avoids the truss concrete cracking during the lifting process. The two wing plates 14 and the reinforcement are at the same angle, so there are multiple force points during the lifting process, making the force distribution of this device more uniform and stable during the lifting process, avoiding the safety hazards caused by uneven force distribution.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A crankshaft linkage self-locking hoisting apparatus, characterized by, The utility model provides a kind of movable wing plate assembly, including bottom plate (1), the top surface of the bottom plate (1) one end mirror image is connected with two mounting plates (2), the top of two mounting plates (2) is equipped with mounting hole, first pin shaft (3) is installed in the mounting hole, the first pin shaft (3) is rotatably connected with hanging plate (4), the movable wing plate assembly for supporting truss muscle is installed on the bottom plate (1); The movable wing plate assembly includes two arched mounting blocks (5), a moving plate (6), two first cranks (7), two second pin shafts (8), four limiting rods (9), two third pin shafts (12), two second cranks (13) and two inner support mechanisms, the middle part of the bottom plate (1) is equipped with two arched mounting blocks (5), the moving plate (6) passes through the two arched mounting blocks (5), the upper surface of the moving plate (6) is connected with two back type limiting plates (10), the upper surface of the moving plate (6) is intermittently provided with two first limiting grooves (11), the lower surface of the moving plate (6) is intermittently provided with two second limiting grooves (19), the two arched mounting blocks (5) are slidably connected in the corresponding first limiting grooves (11), the front end of the upper surface of the bottom plate (1) is mirror image equipped with one second pin shaft (8) and one third pin shaft (12), the middle part of the upper surface of the bottom plate (1) is also mirror image equipped with one second pin shaft (8) and one third pin shaft (12), one end of the first crank (7) is rotatably connected with the second pin shaft (8), one end of the second crank (13) is rotatably connected with the third pin shaft (12), the distal end of the first crank (7) is rotatably connected with one inner support mechanism, the distal end of the second crank (13) is rotatably connected with another inner support mechanism, the front end of the first crank (7) and the second crank (13) is rotatably connected with one limiting rod (9), the two limiting rods (9) at the front end of the bottom plate (1) pass through one back type limiting plate (10), the two limiting rods (9) at the middle part of the bottom plate (1) pass through another back type limiting plate (10).

2. The crankshaft linkage self-locking hoist apparatus according to claim 1, characterized by, The two inner support mechanisms are composed of the same parts, the inner support mechanism includes a wing plate (14), two mounting frames (15), two fourth pin shafts (16), two L-shaped connecting plates (17), two fifth pin shafts (18), the distal end of the first crank (7) and the second crank (13) is rotatably connected with the corresponding fourth pin shaft (16), one end of the L-shaped connecting plate (17) is rotatably connected with the fourth pin shaft (16), the other end of the L-shaped connecting plate (17) is rotatably connected with the fifth pin shaft (18), the fifth pin shaft (18) is installed on the corresponding mounting frame (15), the two mounting frames (15) are intermittently connected on the inner side of the wing plate (14).

3. The crankshaft linkage self-locking hoist apparatus according to claim 2, characterized by, The L-shaped connecting plate (17) is located at the lower end of the corresponding first crank (7) or second crank (13).

4. The crankshaft linkage self-locking hoist apparatus according to claim 1, characterized by, Each of the second cranks (13) is connected with a shaft sleeve (20), each of the shaft sleeves (20) is rotationally connected with the corresponding third pin shaft (12), the bottom of the two shaft sleeves (20) is in contact with the bottom plate (1), and the lower bottom surface of the second crank (13) is horizontally aligned with the upper surface of the first crank (7).

5. The crankshaft linkage self-locking hoist apparatus according to claim 1, characterized by, A lifting hole (22) is formed in the top of the lifting plate (4).

6. The crankshaft linkage self-locking hoist apparatus according to claim 1, characterized by, A third limiting groove (21) is formed in the middle portion of the front end of the bottom plate (1).

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