Unloading device for large beam

Abstract

The utility model relates to the technical field of building construction, in particular to a large beam unloading device which comprises a first bottom plate, a second bottom plate and a top plate, a first lead screw and a second lead screw are rotatably connected between the first bottom plate and the top plate, and a third lead screw and a fourth lead screw are rotatably connected between the second bottom plate and the top plate. And a driving assembly for driving the first lead screw, the second lead screw, the third lead screw and the fourth lead screw to synchronously rotate is mounted at the top of the top plate. When the large beam is clamped, the clamping plate and the screw rod are hinged, the clamping plate can rotate by a certain angle, the clamping plate is attached to the side face of the large beam, and therefore the large beam can be firmly clamped, and when the large beam is unloaded, at least four unloading devices are matched to lift the large beam and slowly move the large beam to the tail of the vehicle, and the unloading efficiency is improved. And in the moving process of the large beam, the bottom of the suspended unloading device falls to the ground, so that the large beam can be transferred to the ground from a vehicle, and then the unloading operation of the large beam can be completed.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a device for unloading large beams. Background Art

[0002] The beam supports all the weights of the components in the upper structure of the building and the roof, and is the most important part of the upper structure of the building. Prefabricated large beams are used in the building construction process. In order to improve the bearing capacity of the beam and reduce the self-weight of the beam, the large beam is generally designed as a trapezoid with inclined sides on both sides. Due to the large weight and long length of the large beam, a special unloading device is required for unloading the large beam. However, when the existing unloading device unloads the vehicle, sometimes the angle between the clamping surface of the unloading device and the inclined surfaces on both sides of the large beam is inconsistent, resulting in the inability to stably clamp the large beam due to improper fitting. Therefore, there are still disadvantages and deficiencies in the prior art. Content of the Utility Model

[0003] The utility model provides a device for unloading large beams to solve the problems raised in the background art.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a device for unloading large beams, including a first bottom plate, a second bottom plate and a top plate. A first lead screw and a second lead screw are rotatably connected between the first bottom plate and the top plate. A third lead screw and a fourth lead screw are rotatably connected between the second bottom plate and the top plate. A driving assembly for synchronously rotating the first lead screw, the second lead screw, the third lead screw and the fourth lead screw is installed on the top of the top plate.

[0005] The first lead screw and the second lead screw are commonly threadedly connected with a first lifting block. A first internal threaded cylinder is rotatably connected to the first lifting block. A first screw rod is threadedly connected to the first internal threaded cylinder. One end of the first screw rod away from the first internal threaded cylinder is hinged to a first clamping plate. A plurality of first guide rods are slidably connected left and right on the first lifting block. The first guide rods are hinged to the first clamping plate. By rotating the first internal threaded cylinder, the first screw rod and the first clamping plate slide left and right; The second lead screw and the third lead screw are commonly threadedly connected with a second lifting block. A second internal threaded cylinder is rotatably connected to the second lifting block. A second screw rod is threadedly connected to the second internal threaded cylinder. One end of the second screw rod away from the second internal threaded cylinder is hinged to a second clamping plate. The second clamping plate is symmetric and facing the first clamping plate. A plurality of second guide rods are slidably connected left and right on the second lifting block. The second guide rods are hinged to the second clamping plate. By rotating the second internal threaded cylinder, the second screw rod and the second clamping plate slide left and right.

[0006] Preferably, a first spring located above the first internal threaded cylinder is hinged between the first clamping plate and the first lifting block. A second spring located above the second internal threaded cylinder is hinged between the second clamping plate and the second lifting block.

[0007] Preferably, self-locking wheels are respectively installed on the first bottom plate and the second bottom plate.

[0008] Preferably, the driving assembly includes a first sprocket, a second sprocket, a third sprocket, a fourth sprocket, and a motor. The first sprocket is coaxially fixed at the top of the first lead screw, the second sprocket is coaxially fixed at the top of the second lead screw, the third sprocket is coaxially fixed at the top of the third lead screw, the fourth sprocket is coaxially fixed at the top of the fourth lead screw. The motor is installed on the top of the top plate, and the output shaft of the motor is in transmission connection with the fourth sprocket. The first sprocket, the second sprocket, the third sprocket, and the fourth sprocket are in transmission connection through a chain.

[0009] Preferably, anti-slip strips are respectively fixedly connected to the first clamping plate and the second clamping plate.

[0010] Preferably, two sides of the bottom of the top plate are respectively fixedly connected with an inclined first fixing plate and a second fixing plate. The first fixing plate is rotationally connected to the first lead screw and the second lead screw, and the second fixing plate is rotationally connected to the third lead screw and the fourth lead screw.

[0011] Preferably, a first hand wheel is fixedly connected to one end of the first internal thread cylinder away from the first screw rod, and a second hand wheel is fixedly connected to one end of the second internal thread cylinder away from the second screw rod.

[0012] The beneficial effects of the present utility model are as follows: (1) When clamping a large beam, since the clamping plate and the screw rod are hinged, the clamping plate can rotate a certain angle, so that the clamping plate fits the side surface of the large beam, thereby firmly clamping the large beam; (2) When unloading the large beam from the vehicle, at least four unloading devices cooperate to lift the large beam and slowly move the large beam towards the rear of the vehicle. During the movement of the large beam, the bottom of the suspended unloading device lands on the ground, so that the large beam can be transferred from the vehicle to the ground, and thus the unloading operation of the large beam can be completed. Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of the present utility model;

[0014] Figure 2 is a structural schematic diagram of the connection between the lifting block, the internal thread cylinder, the screw rod and the clamping plate of the present utility model;

[0015] Figure 3 is a schematic diagram of clamping a large beam by the present utility model;

[0016] Figure 4 is a schematic diagram of mutually cooperating to unload a large beam by the present utility model.

[0017] Figure numerals: 1. first base plate, 2. second base plate, 3. first lead screw, 4. second lead screw, 5. third lead screw, 6. fourth lead screw, 7. top plate, 8. first lifting block, 9. first internal threaded cylinder, 10. first screw, 11. first clamping plate, 12. first guide rod, 13. second lifting block, 14. second internal threaded cylinder, 15. second screw, 16. second clamping plate, 17. second guide rod, 18. large beam, 19. truck, 20. ground, 21. first spring, 22. second spring, 23. first sprocket, 24. second sprocket, 25. third sprocket, 26. fourth sprocket, 27. motor, 28. chain, 29. self-locking wheel, 30. anti-slip strip, 31. first fixed plate, 32. second fixed plate, 33. first hand wheel, 34. second hand wheel. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings. Figure 1 The direction in shall prevail.

[0019] like Figures 1-4 As shown, the utility model provides a large beam unloading device, comprising a first bottom plate 1, a second bottom plate 2 and a top plate 7, the first bottom plate 1 and the second bottom plate 2 are arranged at intervals, the top plate 7 is located above the first bottom plate 1 and the second bottom plate 2, a first screw 3 and a second screw 4 are rotatably connected between the first bottom plate 1 and the top plate 7, a third screw 5 and a fourth screw 6 are rotatably connected between the second bottom plate 2 and the top plate 7, and a driving component for driving the first screw 3, the second screw 4, the third screw 5 and the fourth screw 6 to rotate synchronously is installed on the top of the top plate 7.

[0020] The first lead screw 3 and the second lead screw 4 are commonly threadedly connected to a first lifting block 8, the first lifting block 8 is rotatably connected to a first internally threaded barrel 9, the first internally threaded barrel 9 is internally threadedly connected to a first screw 10, the first screw 10 is hingedly connected to a first clamping plate 11 at one end away from the first internally threaded barrel 9, a plurality of first guide rods 12 are slidably connected to the first lifting block 8, the first guide rods 12 are hingedly connected to the first clamping plate 11, and the first screw 10 and the first clamping plate 11 slide left and right by rotating the first internally threaded barrel 9; the second lead screw 4 and the third lead screw 5 are commonly threadedly connected to a first lifting block 8, the first internally threaded barrel 9 is internally threadedly connected to a first screw 10, and the first internally threaded barrel 9 is internally threadedly connected to a first clamping plate 11, and the first internally threaded barrel 9 is rotated to realize the left and right sliding of the first screw 10 and the first clamping plate 11; A second lifting block 13 is connected, and a second internally threaded tube 14 is rotatably connected to the second lifting block 13. The second internally threaded tube 14 is internally threadedly connected to a second screw 15. The second screw 15 is hinged at one end away from the second internally threaded tube 14 to a second clamping plate 16. The second clamping plate 16 is symmetrical to the first clamping plate 11 and is arranged opposite to each other. A plurality of second guide rods 17 are connected to the second lifting block 13 for sliding left and right. The second guide rods 17 are hinged to the second clamping plate 16. The second screw 15 and the second clamping plate 16 can slide left and right by rotating the second internally threaded tube 14.

[0021] Specifically,Figure 4 As shown, during use, at least four unloading devices are required to work together. First, two unloading devices are placed on both the front and rear sides of the center of gravity of the large beam 18, and the first clamping plates 11 and the second clamping plates 16 of each unloading device are respectively located on both sides of the large beam 18. Then, rotate the first internal thread cylinder 9 so that the first screw rod 10 drives the first clamping plate 11 to move towards the large beam 18. Since the first clamping plate 11 is hinged to the first screw rod 10, during the process of the first clamping plate 11 moving towards the side of the large beam 18, the clamping surface of the first clamping plate 11 will automatically rotate and fit the side of the large beam 18. Similarly, rotate the second internal thread cylinder 14 so that the clamping surface of the second clamping plate 16 fits the side of the large beam 18, thereby stably clamping the large beam 18. Next, start the drive assembly, and the drive assembly drives the first lead screw 3, the second lead screw 4, the third lead screw 5, and the fourth lead screw 6 to rotate synchronously, causing the first lifting block 8 and the second lifting block 13 to slowly rise, thereby driving the large box girder to rise. Then, push the large beam 18 forward on the freight car 19 through the self-locking wheel 29. When the unloading device at the front end of the large beam 18 is suspended, start the drive assembly of this unloading device, and the drive assembly drives the four lead screws to rotate simultaneously, so that the bottom of this unloading device slowly moves downward until the bottom of this unloading device lands on the ground. Finally, continue to push the large beam 18 forward, making the unloading devices on the large beam 18 suspended in sequence, and through the drive assembly, the bottom of the suspended unloading device slowly descends until the bottoms of all the unloading devices land on the ground. In this way, the large beam 18 is transferred from the freight car to the ground 20, and thus the unloading operation of the large beam 18 can be completed. In addition, the large beam 18 can also be moved to a designated position through the self-locking wheel 29, and by controlling the reverse rotation of the lead screw through the drive assembly, the large beam 18 slowly descends onto the large beam 18 support, and then the first internal thread cylinder 9 and the second internal thread cylinder 14 can be rotated to make the first clamping plate 11 and the second clamping plate 16 move in the opposite direction to loosen the large beam 18, thereby completing the transfer of the large beam 18.

[0022] When the clamping large beam 18 of the present utility model, since the clamping plate and the screw rod are hinged, the clamping plate can rotate a certain angle, so that the clamping plate fits the side of the large beam 18, thereby firmly clamping the large beam 18. Secondly, when unloading the large beam 18, at least four unloading devices cooperate to lift the large beam 18 and slowly move the large beam 18 towards the tail of the vehicle. During the movement of the large beam 18, the bottom of the suspended unloading device lands on the ground, so that the large beam 18 can be transferred from the vehicle to the ground 20, and then the unloading operation of the large beam 18 can be completed.

[0023] In some embodiments, a first spring 21 is hinged between the first clamping plate 11 and the first lifting block 8 above the first internal thread cylinder 9, and a second spring 22 is hinged between the second clamping plate 16 and the second lifting block 13 above the second internal thread cylinder 14. Specifically, during use, the first spring 21 can limit the orientation of the first clamping plate 11, and the second spring 22 can limit the orientation of the second clamping plate 16, so that the first clamping plate 11 and the second clamping plate 16 face the sides of the large beam 18, thus facilitating the clamping surface to fit the sides of the large beam 18 when clamping the large beam 18.

[0024] In some embodiments, the drive assembly includes a first sprocket 23, a second sprocket 24, a third sprocket 25, a fourth sprocket 26, and a motor 27. The first sprocket 23 is coaxially fixed to the top of the first lead screw 3, the second sprocket 24 is coaxially fixed to the top of the second lead screw 4, the third sprocket 25 is coaxially fixed to the top of the third lead screw 5, and the fourth sprocket 26 is coaxially fixed to the top of the fourth lead screw 6. The motor 27 is installed on the top of the top plate 7, and the output shaft of the motor 27 is drivingly connected to the fourth sprocket 26. The first sprocket 23, the second sprocket 24, the third sprocket 25, and the fourth sprocket 26 are drivingly connected by a chain 28. Specifically, during use, the motor 27 is started, and the motor 27 drives the fourth sprocket 26 to rotate. The fourth sprocket 26 drives the first sprocket 23, the second sprocket 24, and the third sprocket 25 to rotate synchronously through the chain 28, so that the first lead screw 3, the second lead screw 4, the third lead screw 5, and the fourth lead screw 6 rotate synchronously.

[0025] In some embodiments, self-locking wheels 29 are respectively installed on the first bottom plate 1 and the second bottom plate 2. In this embodiment, two universal wheels with self-locking functions are installed at the bottom of the first bottom plate 1, and two universal wheels with self-locking functions are installed at the bottom of the second bottom plate 2. Specifically, after the device clamps the large beam 18, the self-locking wheels 29 are provided to facilitate the pushing of the large beam 18.

[0026] In some embodiments, anti-slip strips 30 are respectively fixedly connected to the first clamping plate 11 and the second clamping plate 16. The anti-slip strip 30 is fixedly connected to the side of the first clamping plate 11 away from the first screw 10, and the anti-slip strip 30 is fixedly connected to the side of the second clamping plate 16 away from the second screw 15. Specifically, when the first clamping plate 11 and the second clamping plate 16 clamp the large beam 18, the anti-slip strips 30 can increase the friction between the first clamping plate 11, the second clamping plate 16, and the large beam 18, thereby ensuring the clamping effect and safety.

[0027] In some embodiments, the two sides of the bottom of the top plate 7 are respectively fixedly connected with an inclined first fixing plate 31 and a second fixing plate 32. The first fixing plate 31 is rotationally connected to the first lead screw 3 and the second lead screw 4, and the second fixing plate 32 is rotationally connected to the third lead screw 5 and the fourth lead screw 6. Specifically, the fixing plate can support the lead screw, thereby improving the stability of the device.

[0028] In some embodiments, one end of the first internal thread cylinder 9 far from the first screw rod 10 is fixedly connected with a first hand wheel 33. By setting the first hand wheel 33, it is convenient for workers to rotate the first internal thread cylinder 9. One end of the second internal thread cylinder 14 far from the second screw rod 15 is fixedly connected with a second hand wheel 34. By setting the second hand wheel 34, it is convenient for workers to rotate the second internal thread cylinder 14.

[0029] The above embodiments can be combined with each other.

[0030] The above embodiments do not impose any formal restrictions on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention all fall within the protection scope of the technical solution of the present invention.

Claims

1. A large beam unloading device, comprising a first bottom plate, a second bottom plate and a top plate, characterized in that: A first screw and a second screw are rotatably connected between the first bottom plate and the top plate, a third screw and a fourth screw are rotatably connected between the second bottom plate and the top plate, and a driving assembly for driving the first screw, the second screw, the third screw and the fourth screw to rotate synchronously is installed on the top of the top plate; The first lead screw and the second lead screw are commonly threadedly connected to a first lifting block, a first internally threaded barrel is rotatably connected to the first lifting block, a first screw is internally threadedly connected to the first internally threaded barrel, a first clamping plate is hingedly connected to one end of the first screw away from the first internally threaded barrel, a plurality of first guide rods are slidably connected to the first lifting block, the first guide rods are hingedly connected to the first clamping plate, and the first screw and the first clamping plate can slide left and right by rotating the first internally threaded barrel; The second lead screw and the third lead screw are commonly threadedly connected to the second lifting block, the second lifting block is rotatably connected to the second internal threaded cylinder, the second internal threaded cylinder is internally threadedly connected to the second screw, the second screw is hingedly connected to the second clamping plate at one end away from the second internal threaded cylinder, the second clamping plate is symmetrical to the first clamping plate and arranged facing each other, a plurality of second guide rods are connected to the second lifting block for sliding left and right, the second guide rods are hinged to the second clamping plate, and the second screw and the second clamping plate can slide left and right by rotating the second internal threaded cylinder.

2. A large beam unloading device according to claim 1, characterized in that: A first spring located above the first internal threaded cylinder is hingedly connected between the first clamping plate and the first lifting block, and a second spring located above the second internal threaded cylinder is hingedly connected between the second clamping plate and the second lifting block.

3. The unloading device for a large beam according to claim 1, characterized in that: The first bottom plate and the second bottom plate are respectively provided with self-locking wheels.

4. The unloading device for a large beam according to claim 1, characterized in that: The driving assembly includes a first sprocket, a second sprocket, a third sprocket, a fourth sprocket, and a motor. The first sprocket is coaxially fixed to the top of the first lead screw, the second sprocket is coaxially fixed to the top of the second lead screw, the third sprocket is coaxially fixed to the top of the third lead screw, and the fourth sprocket is coaxially fixed to the top of the fourth lead screw. The motor is installed on the top of the top plate, and the output shaft of the motor is connected to the fourth sprocket. The first sprocket, the second sprocket, the third sprocket and the fourth sprocket are connected by a chain transmission.

5. The large beam unloading device according to claim 1, characterized in that: The first clamping plate and the second clamping plate are respectively fixedly connected with anti-slip strips.

6. The unloading device for a large beam according to claim 1, characterized in that: The two sides of the bottom of the top plate are respectively fixedly connected with a first fixing plate and a second fixing plate which are arranged obliquely. The first fixing plate is rotatably connected with the first screw and the second screw, and the second fixing plate is rotatably connected with the third screw and the fourth screw.

7. The unloading device for a large beam according to claim 1, characterized in that: One end of the first internal threaded barrel away from the first screw is fixedly connected to a first hand wheel, and one end of the second internal threaded barrel away from the second screw is fixedly connected to a second hand wheel.

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