Profile leveling device for prefabricated steel truss

Abstract

The utility model relates to the technical field of steel truss manufacturing, in particular to a sectional material leveling device for a prefabricated steel truss, which comprises four groups of supporting units, four groups of connecting units and a plurality of limiting units. Compared with the prior art, the utility model has the advantages that the lifting adjusting mechanism is arranged on the fixed block, the worm, the worm gear and the lifting rod are matched, an operator can easily and accurately adjust the supporting height of the fixed block only by rotating the rocker, and meanwhile, the angle scale marks on the connecting plate are matched with the pointer on the rotating shaft, so that the operation is convenient. An operator can conveniently and quickly adjust the device to a horizontal state, the leveling efficiency is remarkably improved, the operation difficulty is reduced, profiles of different sizes and shapes can be flexibly and accurately limited and fixed through the L-shaped clamping plates and the adjustable limiting bolts, displacement of the profiles in the welding process is effectively prevented, and the welding quality is improved. And reliable guarantee is provided for welding quality.

Description

Technical Field

[0001] This utility model relates to the field of steel truss manufacturing technology, specifically to a profile leveling device for prefabricated steel trusses. Background Technology

[0002] In engineering fields such as building construction and bridge construction, precast steel trusses are widely used due to their high strength and high stability. In the production process of precast steel trusses, profile leveling is a crucial step, as the flatness of the profiles directly affects the structural strength and overall quality of the steel truss. However, most existing profile leveling devices are complex in structure, inconvenient to operate, and difficult to quickly and accurately adjust the profiles to a horizontal state. Furthermore, when limiting and fixing the profiles, they often lack effective adjustment and positioning structures, leading to easy displacement of the profiles during welding, affecting welding quality, and failing to meet the high-efficiency and precise production requirements of modern precast steel trusses. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a profile leveling device for prefabricated steel trusses, which can conveniently level and precisely limit the position of the profile.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a profile leveling device for prefabricated steel trusses, comprising: four sets of support units, each set of support units including a fixed block, the fixed block having a groove on its side wall, a lifting adjustment mechanism on the fixed block for adjusting the support height of the fixed block, and connecting plates fixed on adjacent side walls of the fixed block; four sets of connection units, each set of connection units including a first connecting rod and a second connecting rod respectively rotatably connected to two of the connection plates, the first connecting rod and the second connecting rod being perpendicularly arranged, the first connecting rod having a dovetail groove, the second connecting rod having a snap-fit ​​strip that can slide with the dovetail groove, and the first connecting rod and the second connecting rod also having a sliding groove; a plurality of limiting units, the plurality of limiting units being slidably arranged in the sliding groove, two as a group for limiting; by adjusting to a horizontal state through the support units, the profile is placed on the connection units as needed and the limiting units limit the profile, facilitating welding operations and meeting the requirements of prefabricated steel trusses.

[0005] Preferably, the lifting adjustment mechanism includes a mounting shell disposed on the bottom surface of the fixed block. A worm gear is rotatably disposed in the mounting shell, and one end of the worm gear passes through the side wall of the mounting shell and is connected to a rocker arm. A worm wheel meshes with the worm gear, and a lifting rod coaxially disposed on the worm wheel is threadedly connected to the worm wheel. The lifting rod passes through the worm wheel and has a support plate at its bottom end. The fixed block has a sliding cavity that is clearance-fitted with the lifting rod, and a limit groove is formed on the side wall of the sliding cavity. A limit block is provided on the top side wall of the lifting rod and slides along the limit groove.

[0006] Preferably, the connecting plate is provided with angle scale lines around the pivot of the first connecting rod and the second connecting rod.

[0007] Preferably, pointers for indicating angles are fixedly provided on the rotating shafts of the first connecting rod and the second connecting rod.

[0008] Preferably, the groove on each of the first connecting rods and the second connecting rods extends to the end face of the first connecting rod and the second connecting rod away from the fixing block.

[0009] Preferably, the limiting unit includes a clamping plate, and a slider that slides along the groove is fixedly connected to the bottom end of the clamping plate. The clamping plate and the slider are combined to form an L-shape, and a limiting bolt with its end face abutting against the bottom surface of the groove is threaded onto the slider.

[0010] With the above structure, this utility model has the following advantages:

[0011] This invention features a lifting and adjusting mechanism on a fixed block. Utilizing the cooperation of a worm gear, worm wheel, and lifting rod, the operator can easily and precisely adjust the support height of the fixed block simply by turning a rocker arm. Simultaneously, the angle scale on the connecting plate and the pointer on the rotating shaft work together to facilitate quick and easy leveling of the device, significantly improving leveling efficiency and reducing operational difficulty. Through an L-shaped clamping plate and adjustable limiting bolts, it can flexibly and precisely limit and fix profiles of different sizes and shapes, effectively preventing displacement of the profiles during welding and providing reliable assurance for welding quality.

[0012] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the combined state of the support unit and the connecting unit.

[0016] Figure 3 This is the front view of this utility model.

[0017] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure of AA.

[0018] As shown in the figure:

[0019] 1. Fixing block; 2. Groove; 3. Connecting plate; 4. First connecting rod; 5. Slide groove; 6. Clamping plate; 7. Limiting bolt; 8. Second connecting rod; 9. Pointer; 10. Dovetail groove; 11. Snap-fit ​​strip; 12. Support plate; 13. Lifting rod; 14. Rocker arm; 15. Mounting shell; 16. Worm gear; 17. Worm; 18. Limiting groove; 19. Limiting block. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Combination Figure 1 As shown, the profile leveling device for prefabricated steel trusses includes four sets of support units, four sets of connection units, and several limiting units.

[0023] Each support unit includes a fixed block 1 with a slot 2 on its side wall and a lifting adjustment mechanism for adjusting its support height. Connecting plates 3 are fixed to adjacent side walls of the fixed block 1. Each connecting unit includes a first connecting rod 4 and a second connecting rod 8 rotatably connected to the two connecting plates 3. The first connecting rod 4 and the second connecting rod 8 are perpendicular to each other. The first connecting rod 4 has a dovetail groove 10, and the second connecting rod 8 has a snap-fit ​​strip 11 that slidably engages with the dovetail groove 10. Sliding grooves 5 are also provided on the first connecting rod 4 and the second connecting rod 8. Several limiting units are slidably disposed in the sliding grooves 5, with two units forming a group for limiting. The support unit is adjusted to a horizontal state, and the profile is placed on the connecting unit as needed, with the limiting units restricting the profile for easy welding operations, thus meeting the prefabrication requirements of the steel truss.

[0024] In one embodiment of this utility model, the lifting adjustment mechanism includes a mounting shell 15 disposed on the bottom surface of a fixed block 1. A worm gear 17 is rotatably disposed in the mounting shell 15, and one end of the worm gear 17 passes through the side wall of the mounting shell 15 and is connected to a rocker arm 14. A worm wheel 16 meshes with the worm gear 17, and a lifting rod 13 coaxially disposed on the worm wheel 16 is threadedly connected to the worm wheel 16. The lifting rod 13 passes through the worm wheel 16, and a support plate 12 is provided at the bottom end of the lifting rod 13. A sliding cavity with clearance fit to the lifting rod 13 is provided on the fixed block 1, and a limiting groove 18 is provided on the side wall of the sliding cavity. A limiting block 19 is provided on the top side wall of the lifting rod 13 and slides along the limiting groove 18. Specifically, as shown... Figures 3-4 As shown, the mounting housing 15 has a rectangular box-like structure, with an internal cavity to accommodate the worm gear 17 and the worm wheel 16. The worm gear 17 is rotatably connected to the two side walls of the mounting housing 15 via bearings. The rocker arm 14 is located outside the mounting housing 15 and is fixedly connected to the end of the worm gear 17. By rotating the rocker arm 14, the worm gear 17 can be driven to rotate synchronously. The worm wheel 16 is engaged with the worm gear 17. The center of the worm wheel 16 is provided with an internal thread hole that matches the external thread of the lifting rod 13. The top end of the lifting rod 13 is located in the sliding cavity. The limiting block 19 is embedded in the limiting groove 18 and can slide up and down along the limiting groove 18 to prevent the lifting rod 13 from rotating with the worm wheel 16, ensuring that the lifting rod 13 only performs linear lifting and lowering movements. When it is necessary to adjust the support height of the fixed block 1, rotating the rocker arm 14 causes the worm gear 16 to rotate, and the worm wheel 16 drives the lifting rod 13 to move up and down in the sliding cavity, thereby achieving precise adjustment of the support height.

[0025] In one embodiment of this utility model, the connecting plate 3 has angle scale lines on the pivot surrounding the first connecting rod 4 and the second connecting rod 8. Specifically, as shown... Figure 2As shown, the connecting plate 3 is a metal plate with shaft holes on its surface for the shafts at the ends of the first connecting rod 4 and the second connecting rod 8 to pass through. Angle scale lines are distributed in a ring around the shaft holes on the surface of the connecting plate 3. The scale lines are made by etching process, and the scale values ​​are accurate to the degree. The included angle between adjacent scale lines is 30°, so that the operator can adjust the rotation angle of the first connecting rod 4 and the second connecting rod 8.

[0026] In one embodiment of this utility model, a pointer 9 for indicating angle is fixedly provided on the rotating shaft of the first connecting rod 4 and the second connecting rod 8. Specifically, as shown... Figure 2 As shown, pointer 9 is an arrow-shaped structure made of a thin metal sheet. One end of it is fixed to the end face of the rotating shaft by welding or bolting, and the other end points to the angle scale line on the connecting plate 3. Pointer 9 rotates synchronously with the rotating shaft. When the first connecting rod 4 or the second connecting rod 8 rotates relative to the connecting plate 3, pointer 9 rotates with the rotating shaft and indicates the current angle value. Combined with the angle scale line on the connecting plate 3, the rotation angle of the two rods can be determined intuitively, which makes it easy for the operator to accurately adjust the angle of the connecting unit to keep it horizontal.

[0027] In one embodiment of this utility model, the sliding groove 5 on each of the first connecting rod 4 and the second connecting rod 8 extends to the end face of the first connecting rod 4 and the second connecting rod 8 away from the fixing block 1. Specifically, as shown... Figure 2 As shown, the slide groove 5 is a T-shaped groove structure that extends along the length of the first connecting rod 4 and the second connecting rod 8. The width of the groove opening is smaller than the width of the groove bottom to prevent the slider from coming out of the slide groove 5. The end of the slide groove 5 is flush with the end face of the connecting rod, forming an open structure. This allows the slider of the limiting unit to slide smoothly into or out of the slide groove 5 from the end face of the connecting rod, facilitating the installation, disassembly, and position adjustment of the limiting unit. In actual operation, the position of the limiting unit in the slide groove 5 can be flexibly adjusted according to the size and position requirements of the profile, or the limiting unit can be removed from the slide groove 5 for replacement or repair.

[0028] In one embodiment of this utility model, the limiting unit includes a clamping plate 6, and a slider that slides along the slide groove 5 is fixedly connected to the bottom end of the clamping plate 6. The clamping plate 6 and the slider are combined in an L-shape, and a limiting bolt 7 with its end face abutting against the bottom surface of the slide groove 5 is threaded onto the slider. Specifically, as shown... Figure 2As shown, the clamping plate 6 is a rectangular steel plate, which is connected to the slider by welding or integral molding to form an L-shaped structure. The slider is a T-shaped slider that is adapted to the slide groove 5 and can slide freely in the slide groove 5. The top of the slider has a threaded hole, and the limiting bolt 7 passes through the threaded hole and abuts against the bottom surface of the slide groove 5. When it is necessary to fix the position of the limiting unit, the limiting bolt 7 is rotated so that its end presses against the bottom surface of the slide groove 5, and the slider is fixed in a specific position in the slide groove 5 by friction. When it is necessary to adjust the position of the limiting unit, the limiting bolt 7 is loosened so that the slider can slide in the slide groove 5. Through the two limiting units as a group, the profile placed on the connecting unit can be clamped and limited from both sides to ensure that the profile remains stable during the welding process.

[0029] In summary, this utility model can achieve horizontal adjustment of the device through the lifting and adjusting mechanism of four sets of support units. The four sets of connecting units can flexibly adjust the shape and angle according to actual needs through the sliding cooperation of dovetail groove 10 and snap-fit ​​strip 11 and the rotatable connecting structure. The setting of angle scale line and pointer 9 further improves the accuracy of angle adjustment. The limiting unit can slide freely in the slide groove 5 and be reliably fixed, which can accurately limit the profiles of different sizes and shapes. The device has a reasonable structural design, is easy to operate, has high leveling accuracy, and stable and reliable limiting, which can significantly improve the production efficiency and welding quality of prefabricated steel trusses.

[0030] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the circuit connections also use conventional connection methods in the prior art, which will not be detailed here. Any content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout the text are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A profile leveling device for precast steel trusses, characterized in that, include: Four sets of support units, each set of support units includes a fixed block, the fixed block has a groove on its side wall, the fixed block is provided with a lifting adjustment mechanism for adjusting the support height of the fixed block, and a connecting plate is fixed on one of the adjacent side walls of the fixed block; Four sets of connecting units, each set of connecting units includes a first connecting rod and a second connecting rod that are rotatably connected to the two connecting plates respectively. The first connecting rod and the second connecting rod are arranged perpendicularly. The first connecting rod is provided with a dovetail groove. The second connecting rod is provided with a snap-fit ​​strip that can slide with the dovetail groove. The first connecting rod and the second connecting rod are also provided with sliding grooves. A plurality of limiting units are slidably disposed in the slide groove, with two units forming a group for limiting; The support unit is adjusted to a horizontal state, and the profile is placed on the connecting unit as needed. The limiting unit limits the profile, which facilitates welding operations and meets the prefabrication requirements of steel trusses.

2. The profile leveling device for prefabricated steel trusses according to claim 1, characterized in that: The lifting and adjusting mechanism includes a mounting shell disposed on the bottom surface of the fixed block. A worm gear is rotatably disposed in the mounting shell, and one end of the worm gear passes through the side wall of the mounting shell and is connected to a rocker arm. A worm wheel meshes with the worm gear, and a lifting rod coaxially disposed on the worm wheel is threadedly connected to the worm wheel. The lifting rod passes through the worm wheel and has a support plate at its bottom end. A sliding cavity with clearance fit to the lifting rod is formed on the fixed block, and a limit groove is formed on the side wall of the sliding cavity. A limit block is provided on the top side wall of the lifting rod and slides along the limit groove.

3. The profile leveling device for prefabricated steel trusses according to claim 2, characterized in that: The connecting plate is provided with angle scale lines around the pivot of the first connecting rod and the second connecting rod.

4. The profile leveling device for precast steel trusses according to claim 3, characterized in that: The first connecting rod and the second connecting rod are fixed with pointers for indicating angles.

5. The profile leveling device for precast steel trusses according to claim 4, characterized in that: The grooves on each of the first and second connecting rods extend to the end face of the first and second connecting rods away from the fixing block.

6. The profile leveling device for precast steel trusses according to claim 5, characterized in that: The limiting unit includes a clamping plate, and a slider that slides along the groove is fixedly connected to the bottom end of the clamping plate. The clamping plate and the slider are combined to form an L-shape, and a limiting bolt with its end face abutting against the bottom surface of the groove is threaded onto the slider.

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