Large-span truss adaptive combined support jig frame with self-sliding function

Abstract

The utility model discloses a large -span truss self -adaptation combined formula support cradle with the function of sliding, including two slide plates of sliding connection on base, two moving plates are slidably connected on the slide plate, be provided with first elevating system on the moving plate, the elevating end fixedly connected with first bracket mechanism of first elevating system, the first drive mechanism for driving two slide plates to be close to or away from each other is fixedly installed on the base, the second drive mechanism for driving two moving plates to be close to or away from each other is fixedly installed on the slide plate, the middle part of slide plate is provided with second elevating system, the elevating end fixedly connected with second bracket mechanism of second elevating system, the utility model discloses can adapt to the truss of different width and length, for different specifications truss, do not need to dismantle cradle main part and rebuild. Adapt to the field of construction technology.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, specifically, it relates to a large-span truss adaptive combined support frame with self-sliding function. Background Technology

[0002] As modern construction engineering develops towards large spaces and large spans, large-span trusses (such as tubular trusses and steel trusses) have become key load-bearing structures in core projects such as large stadiums, bridge main beams, and industrial plants due to their advantages such as light weight, reasonable stress distribution, and wide coverage. The span of such trusses often reaches more than 30m, and some super-large projects even exceed 100m. Their on-site assembly process relies on support frames to provide temporary stable support to ensure that the truss maintains its designed posture during welding, positioning, and web member installation, and avoids deformation or displacement caused by its own weight or construction load. Therefore, the adaptability, adjustment accuracy, and operational efficiency of the support frames directly determine the truss assembly quality and construction progress.

[0003] However, in the prior art, the utility model patent with publication number CN221973051U discloses a support frame for a large-span inverted triangular tube truss. This solution has become the mainstream technology for supporting large-span inverted triangular tube trusses. It has achieved significant improvements compared to the traditional fixed frame. However, the support is fixed to the ground by the base and bolts, and the second support seat is detachably connected to the ground by the fixed pile or bolts. If it is necessary to adapt to trusses of different lengths or different widths, the ground bolts of the support and the fixed piles of the second support seat must be completely removed first. The frame is then moved to a new length position by hoisting equipment, and the fasteners are then retightened. The adjustment efficiency is low. Therefore, we propose a large-span truss adaptive combined support frame with a sliding function. Utility Model Content

[0004] This invention provides a large-span truss adaptive combined support frame with built-in sliding function to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An adaptive combined support frame for a large-span truss with built-in sliding function includes two sliding plates slidably connected to a base in the left-right direction. Two movable plates are slidably connected to the sliding plates in the front-back direction. A first lifting mechanism is provided on the movable plates. The lifting end of the first lifting mechanism is fixedly connected to a first bracket mechanism for supporting the upper chord of the truss. A first drive mechanism for driving the two sliding plates to move closer or further apart is fixedly installed on the base. A second drive mechanism for driving the two movable plates to move closer or further apart is fixedly installed on the sliding plates. A second lifting mechanism is provided in the middle of the sliding plates. The lifting end of the second lifting mechanism is fixedly connected to a second bracket mechanism for supporting the lower chord of the truss.

[0006] Furthermore, a first T-shaped slider is fixedly connected to the front and rear sides of the bottom surface of the skateboard, and a first T-shaped groove is opened on the front and rear sides of the base, and the first T-shaped slider is slidably connected in the first T-shaped groove.

[0007] Furthermore, the first drive mechanism includes a first drive motor fixedly mounted on the base, and two first T-shaped slides respectively rotatably connected to a threaded rod with a reverse thread. The threaded rod passes through the two first T-shaped slides, and the threaded sections of the threaded rod are threadedly connected to the two first T-shaped slides respectively. The output shaft of the first drive motor is coaxially and fixedly connected to the left end of one of the threaded rods with a reverse thread. The right end of the threaded rod is coaxially and fixedly fitted with a synchronous pulley, and the two synchronous pulleys are connected by a synchronous belt drive.

[0008] Furthermore, a second T-shaped slider is fixedly connected to the bottom surface of the movable plate, and a second T-shaped groove is provided on the front and rear sides of the slide plate, and the second T-shaped slider is slidably connected in the second T-shaped groove.

[0009] Furthermore, the second drive mechanism includes a second drive motor fixedly installed at the front end of the slide plate, and a positive and negative threaded screw rotatably passing through the two second T-shaped slide grooves. The output shaft of the second drive motor is coaxially and fixedly connected to the end of the positive and negative threaded screw, and the positive and negative threaded sections of the positive and negative threaded screw are respectively threadedly connected to the two second T-shaped slides.

[0010] Furthermore, the first lifting mechanism includes a driving hydraulic cylinder fixedly installed on the movable plate, and the piston rod on the driving hydraulic cylinder is fixedly connected to the first bracket mechanism; the second lifting mechanism includes an electric telescopic rod fixedly installed in the middle of the slide plate, and the telescopic end of the electric telescopic rod is fixedly connected to the second bracket mechanism.

[0011] Furthermore, the first bracket mechanism and the second bracket mechanism have the same structure, and both include a top plate, two vertical plates and two extrusion arc plates. The two vertical plates are respectively fixedly connected to the front and rear sides of the top plate. The two extrusion arc plates are symmetrically arranged front and rear and slidably connected to the top plate. A transmission screw is rotatably connected to the vertical plate. The end of the transmission screw is threadedly connected to a threaded hole opened at the end of the transmission rod. Blind holes are respectively opened in the middle of the opposite sides of the two extrusion arc plates. The end of the transmission rod passes through the middle of the extrusion arc plate and extends into the blind hole. The diameter of the blind hole is larger than the diameter of the transmission rod. A baffle is movably arranged in the blind hole. The baffle is fixedly connected to the transmission rod. An external thread is formed on the outside of the transmission rod, and a nut is connected to the external thread of the transmission rod.

[0012] This invention, by employing the aforementioned structure, achieves the following technological advancements compared to existing technologies: When adapting to trusses of different lengths, the first drive mechanism on the base is activated. This mechanism moves the two sliding plates closer together or further apart, thereby causing the first and second support mechanisms on the left and right sides to move closer or further apart, thus supporting trusses of different lengths. When adapting to trusses of different lengths, the second drive mechanism at the front of the two sliding plates is activated. This mechanism moves the two moving plates closer together or further apart, thereby causing the first and second support mechanisms on the front and rear sides to move closer or further apart, thus supporting trusses of different widths. After width and length adaptation are achieved, the heights of the first and second support mechanisms are adjusted by the first and second lifting mechanisms respectively, ensuring that the first and second support mechanisms are tightly fitted with the upper and lower chords of the truss, respectively. This invention eliminates the need for custom-made jigs for different truss specifications and the need to disassemble and rebuild the jig body, completely solving the problem of traditional fixed jigs being "one jig for one use." This addresses the issue of resource waste, significantly reduces the procurement and maintenance costs of construction equipment, and enables automatic sliding adjustment of the sliding plate and the moving plate through the first and second drive mechanisms, eliminating the need for manual disassembly of bolts and handling of heavy components. At the same time, the first and second lifting mechanisms can quickly adjust the height of the first and second bracket mechanisms to match the elevation of the upper and lower chords of the truss, making adjustment convenient and efficient and shortening the construction cycle. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1Enlarged view of point A in the middle; Figure 3 This is an exploded view of the skateboard and base of this utility model; Figure 4 This is an exploded view of the skateboard and moving board of this utility model; Figure 5 This is a cross-sectional view of the first bracket mechanism of this utility model connected to the upper chord of the truss.

[0015] Components marked: 1. Base; 2. Slide plate; 3. Moving plate; 4. Upper chord of truss; 5. Lower chord of truss; 6. First bracket mechanism; 601. Top plate; 602. Vertical plate; 603. Extruded arc plate; 7. Second bracket mechanism; 8. First T-shaped slider; 9. First T-shaped slide groove; 10. First drive motor; 11. Threaded rod (positive and negative threads); 12. Synchronous pulley; 13. Synchronous belt; 14. Second T-shaped slider; 15. Second T-shaped slide groove; 16. Second drive motor; 17. Lead screw (positive and negative threads); 18. Drive hydraulic cylinder; 19. Electric telescopic rod; 20. Transmission screw; 21. Transmission rod; 22. Threaded hole. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] This utility model discloses a large-span truss adaptive combined support frame with built-in sliding function, such as... Figure 1-5 As shown, the structure includes two sliding plates 2 that are slidably connected to the base 1 in the left-right direction. Two movable plates 3 are slidably connected to the sliding plates 2 in the front-back direction. A first lifting mechanism is provided on the movable plates 3. A first bracket mechanism 6 for supporting the upper chord 4 of the truss is fixedly connected to the lifting end of the first lifting mechanism. A first drive mechanism for driving the two sliding plates 2 to move closer or further away from each other is fixedly installed on the base 1. A second drive mechanism for driving the two movable plates 3 to move closer or further away from each other is fixedly installed on the sliding plates 2. A second lifting mechanism is provided in the middle of the sliding plates 2. A second bracket mechanism 7 for supporting the lower chord 5 of the truss is fixedly connected to the lifting end of the second lifting mechanism. The working principle and advantages of this utility model are as follows: When adapting to trusses of different lengths, the first drive mechanism on the base 1 is activated. The first drive mechanism drives the two sliding plates 2 to move away from or towards each other, thereby driving the first support mechanism 6 and the second support mechanism 7 on the left and right sides to move away from or towards each other, thus lifting trusses of different lengths. When adapting to trusses of different lengths, the second drive mechanism at the front end of the two sliding plates 2 is activated. The second drive mechanism drives the two moving plates 3 to move closer to or away from each other, thereby driving the first support mechanism 6 and the second support mechanism 7 on the front and rear sides to move away from or towards each other, thus lifting trusses of different widths. After the width and length are adapted, the height of the first support mechanism 6 and the second support mechanism 7 are adjusted by the first lifting mechanism and the second lifting mechanism respectively, ensuring that the first support mechanism 6 and the second support mechanism 7 are tightly fitted with the upper chord 4 and the lower chord 5 of the truss, respectively. This utility model does not require custom-made jigs for different specifications of trusses, nor does it require disassembling the jig body and rebuilding it, completely solving the problem of the traditional fixed jig's "one jig for one use" requirement. This addresses the issue of resource waste, significantly reduces the procurement and maintenance costs of construction equipment, and enables automatic sliding adjustment of the slide plate 2 and the moving plate 3 through the first and second drive mechanisms, eliminating the need for manual disassembly of bolts and handling of heavy components. Simultaneously, the first and second lifting mechanisms can quickly adjust the height of the first bracket mechanism 6 and the second bracket mechanism 7 to match the elevation of the upper chord 4 and the lower chord 5 of the truss, making adjustment convenient and efficient and shortening the construction cycle.

[0018] In a preferred embodiment of this utility model, first T-shaped sliders 8 are fixedly connected to the front and rear sides of the bottom surface of the slide plate 2, and first T-shaped grooves 9 are respectively opened on the front and rear sides of the base 1. The first T-shaped sliders 8 are slidably connected in the first T-shaped grooves 9. The first driving mechanism includes a first driving motor 10 fixedly installed on the base 1. A threaded rod 11 with positive and negative threads is rotatably connected in the two first T-shaped grooves 9. The threaded rod 11 passes through the two first T-shaped sliders 8, and the positive and negative threaded sections of the threaded rod 11 are threadedly connected to the two first T-shaped sliders 8 respectively. The output shaft of the first driving motor 10 is coaxially fixedly connected to the left end of one of the threaded rods 11. The right end of the positive and negative threaded rod 11 is coaxially fixed with a synchronous pulley 12, and the two synchronous pulleys 12 are connected by a synchronous belt 13. When it is necessary to adapt to trusses of different lengths, the first drive motor 10 is started. The output shaft of the first drive motor 10 drives one of the positive and negative threaded rods 11, which is coaxially fixed with it, to rotate. Since the other positive and negative threaded rod 11 is connected to the positive and negative threaded rod 11 through the synchronous pulley 12 and the synchronous belt 13, the two positive and negative threaded rods 11 rotate synchronously in the same direction, avoiding adjustment deviation caused by the rotation of the positive and negative threaded rod 11 on one side. Since the "positive thread section" of the positive and negative threaded rod 11 engages with the first T-shaped slider 8 of one side of the slide plate 2 and the "negative thread section" engages with the first T-shaped slider 8 of the other side of the slide plate 2, the positive and negative threaded rod 11 will generate a reverse driving force when it rotates, pushing the two slide plates 2 to move closer or further apart along the first T-shaped slide groove 9, thereby adjusting the distance between the first bracket mechanism 6 and the second bracket mechanism 7 on the left and right sides, and completing the lifting of trusses of different lengths.

[0019] In a preferred embodiment of this utility model, a second T-shaped slider 14 is fixedly connected to the bottom surface of the movable plate 3. Second T-shaped grooves 15 are respectively provided on the front and rear sides of the slide plate 2. The second T-shaped slider 14 is slidably connected within the second T-shaped grooves 15. The second drive mechanism includes a second drive motor 16 fixedly installed at the front end of the slide plate 2. A positive and negative threaded screw 17 rotatably passes through the two second T-shaped grooves 15. The output shaft of the second drive motor 16 is coaxially fixedly connected to the end of the positive and negative threaded screw 17. The positive and negative threaded sections of the positive and negative threaded screw 17 are respectively connected to the two second T-shaped sliders 14. The two slide plates 2 are connected by a thread. When it is necessary to adapt to trusses of different widths, the second drive motor 16 at the front end of the two slide plates 2 is started simultaneously, which directly drives the positive and negative threaded screws 17 fixed on the same axis to rotate. Due to the limitation of the thread direction of the positive and negative threaded screws 17, the second T-shaped slider 14 engaged by the positive thread section of the positive and negative threaded screws 17 will move in opposite directions, which will drive the corresponding moving plates 3 to move closer or further away from each other along the second T-shaped slide groove 15. This allows the distance between the first support mechanism 6 and the second support mechanism 7 on the front and rear sides to be adjusted, thus completing the lifting of trusses of different widths.

[0020] Specifically, the first lifting mechanism includes a driving hydraulic cylinder 18 fixedly installed on the movable plate 3, and the piston rod on the driving hydraulic cylinder 18 is fixedly connected to the first bracket mechanism 6; the second lifting mechanism includes an electric telescopic rod 19 fixedly installed in the middle of the sliding plate 2, and the telescopic end of the electric telescopic rod 19 is fixedly connected to the second bracket mechanism 7.

[0021] In a preferred embodiment of this utility model, the first bracket mechanism 6 and the second bracket mechanism 7 have the same structure, and both include a top plate 601, two vertical plates 602, and two extrusion arc plates 603. The two vertical plates 602 are respectively fixedly connected to the front and rear sides of the top plate 601. The two extrusion arc plates 603 are symmetrically arranged front and rear and are slidably connected to the top plate 601. A transmission screw 20 is rotatably connected to the vertical plate 602. The end of the transmission screw 20 is threaded into a threaded hole 22 opened at the end of the transmission rod 21. The transmission rod 21 is fixedly connected to the outer side of the extrusion arc plate 603. After the first lifting mechanism adjusts the first bracket mechanism 6 to a height flush with the bottom of the upper chord 4 of the truss, The upper chord 4 of the truss is placed between two extrusion arc plates 603, ensuring that the axis of the upper chord 4 is basically aligned with the symmetry line of the extrusion arc plates 603, in preparation for subsequent clamping. The transmission screw 20 on the outside of the vertical plate 602 is rotated, and the transmission screw 20 pushes the transmission rod 21 to move axially through thread engagement. The transmission rod 21 applies a horizontal thrust to the extrusion arc plates 603, forcing the two extrusion arc plates 603 to move closer to the upper chord 4 of the truss along the sliding track of the top plate 601. When the inner side of the extrusion arc plates 603 is completely in contact with the surface of the upper chord 4 of the truss, the rotation of the transmission screw 20 is stopped, realizing the continuous clamping and lifting of the upper chord 4 of the truss. The lifting process of the lower chord 5 of the truss is the same as that of the upper chord 4 of the truss.

[0022] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A self-adaptive combined support frame for large-span trusses with built-in sliding function, characterized in that: It includes two sliding plates (2) that are slidably connected to the base (1) in the left-right direction. Two movable plates (3) are slidably connected to the sliding plates (2) in the front-back direction. A first lifting mechanism is provided on the movable plates (3). A first bracket mechanism (6) for supporting the upper chord (4) of the truss is fixedly connected to the lifting end of the first lifting mechanism. A first driving mechanism for driving the two sliding plates (2) to move closer or further away from each other is fixedly installed on the base (1). A second driving mechanism for driving the two movable plates (3) to move closer or further away from each other is fixedly installed on the sliding plates (2). A second lifting mechanism is provided in the middle of the sliding plates (2). A second bracket mechanism (7) for supporting the lower chord (5) of the truss is fixedly connected to the lifting end of the second lifting mechanism.

2. The adaptive combined support frame for a large-span truss with built-in sliding function according to claim 1, characterized in that: The front and rear sides of the bottom surface of the slide plate (2) are respectively fixedly connected to the first T-shaped slider (8), and the front and rear sides of the base (1) are respectively provided with the first T-shaped groove (9), and the first T-shaped slider (8) is slidably connected in the first T-shaped groove (9).

3. The adaptive combined support frame for a large-span truss with built-in sliding function according to claim 2, characterized in that: The first drive mechanism includes a first drive motor (10) fixedly mounted on the base (1), and two first T-shaped slides (9) respectively rotatably connected to a threaded rod (11) with a reverse thread. The threaded rod (11) passes through the two first T-shaped slides (8), and the threaded sections of the threaded rod (11) are threadedly connected to the two first T-shaped slides (8) respectively. The output shaft of the first drive motor (10) is coaxially fixedly connected to the left end of one of the threaded rods (11), and the right end of the threaded rod (11) is coaxially fixedly fitted with a synchronous pulley (12). The two synchronous pulleys (12) are connected by a synchronous belt (13).

4. The adaptive combined support frame for a large-span truss with built-in sliding function according to claim 3, characterized in that: The bottom surface of the movable plate (3) is fixedly connected to a second T-shaped slider (14), and the front and rear sides of the slide plate (2) are respectively provided with second T-shaped grooves (15), and the second T-shaped slider (14) is slidably connected in the second T-shaped groove (15).

5. The adaptive combined support frame for a large-span truss with built-in sliding function according to claim 4, characterized in that: The second drive mechanism includes a second drive motor (16) fixedly installed at the front end of the slide plate (2), and a positive and negative threaded screw (17) rotatably passes through the two second T-shaped slide grooves (15). The output shaft of the second drive motor (16) is coaxially and fixedly connected to the end of the positive and negative threaded screw (17). The positive and negative threaded sections of the positive and negative threaded screw (17) are respectively threadedly connected to the two second T-shaped slides (14).

6. The adaptive combined support frame for a large-span truss with built-in sliding function according to claim 5, characterized in that: The first lifting mechanism includes a driving hydraulic cylinder (18) fixedly installed on the movable plate (3), and the piston rod on the driving hydraulic cylinder (18) is fixedly connected to the first bracket mechanism (6); the second lifting mechanism includes an electric telescopic rod (19) fixedly installed in the middle of the sliding plate (2), and the telescopic end of the electric telescopic rod (19) is fixedly connected to the second bracket mechanism (7).

7. The adaptive combined support frame for a large-span truss with built-in sliding function according to claim 6, characterized in that: The first bracket mechanism (6) and the second bracket mechanism (7) have the same structure and both include a top plate (601), two vertical plates (602) and two extrusion arc plates (603). The two vertical plates (602) are fixedly connected to the front and rear sides of the top plate (601) respectively. The two extrusion arc plates (603) are symmetrically arranged front and rear and are slidably connected to the top plate (601). A transmission screw (20) is rotatably connected to the vertical plate (602). The end of the transmission screw (20) is threadedly connected to a threaded hole (22) opened at the end of the transmission rod (21). The transmission rod (21) is fixedly connected to the outer side of the extrusion arc plate (603).

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