Tower crane standard knot with high shearing resistance

Abstract

The utility model relates to the technical field of building mechanical equipment, and discloses a tower crane standard knot with strong shearing resistance, which comprises a standard knot body, the standard knot body comprises four main rods, and an upper cross beam, a lower cross beam and a middle beam rod are respectively and fixedly connected between the adjacent main rods. Through the design of the fixing mechanism, after the standard knot main bodies are spliced up and down, the second inserting cylinder located on the upper standard knot main body is correspondingly attached to the top of the first inserting cylinder of the lower standard knot main body, and at the moment, after the fixing ring is stably placed downwards, the fixing ring is in attached contact with the outer side surfaces of the first inserting cylinder and the second inserting cylinder; and at the moment, the fixing ring is located on the outer side of a gap formed after the first inserting cylinder and the second inserting cylinder are spliced, the seam can be effectively limited and fixed, the situation that the splicing position of the first inserting cylinder and the second inserting cylinder deviates under the shearing force effect can be avoided, therefore, the pressure of the position of a fixing bolt is reduced, and the overall shearing force resisting capacity is improved.

Description

Technical Field

[0001] This utility model relates to the field of construction machinery and equipment technology, and in particular to a tower crane standard section with strong shear resistance. Background Technology

[0002] Tower cranes, also known as tower hoists, are mainly used for the vertical and horizontal transport of materials and the installation of building components in building construction. Standard sections are an important part of tower cranes, providing support and adjusting the height of the tower crane.

[0003] Patent publication number CN209797307U discloses a tower crane standard section with high shear resistance, comprising four main chords, each with multiple steps fixed on it. The upper ends of the four main chords are fixedly connected by four upper crossbeams, the middle sections by four middle crossbeams, and the lower ends by four lower crossbeams. Corresponding connecting sleeves are fixedly installed at the upper and lower ends of each main chord. Fastening plates are hinged to the inner sides of the four upper crossbeams. These fastening plates have fastening grooves that engage with the lower crossbeams, and corresponding positioning holes are provided on both the fastening plates and the lower crossbeams. Pins or positioning bolts are inserted into these positioning holes to fix the fastening plates to the lower crossbeams. By using the fastening plates, the inclined tensile force on the main chords is transferred to the fastening plates, reducing the stress on the bolts at the connecting sleeves, improving the shear resistance of the standard section, and enhancing the robustness of the connection between standard sections.

[0004] To reduce the shear force at the bolted connection between the upper and lower standard sections, the above device incorporates a snap-fit ​​plate to enhance the shear resistance of the standard section. However, its overall reinforcement structure is relatively simple, and the snap-fit ​​plate itself is connected by hinges. Since the hinges are connected by a shaft, this shaft is often relatively weak. Once it breaks, the snap-fit ​​plate will not be able to properly support the standard section, resulting in weak reinforcement performance. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a tower crane standard section with high shear resistance.

[0006] The present invention provides a standard tower crane section with high shear resistance, which adopts the following technical solution:

[0007] A standard section for tower cranes with high shear strength includes a standard section body, the standard section body includes four main rods, an upper crossbeam, a lower crossbeam and a middle beam are fixedly connected between adjacent main rods respectively, the middle beam is arranged between the upper crossbeam and the lower crossbeam, and the middle beam is fixedly connected to the upper crossbeam and the lower crossbeam with diagonal bracing rods respectively, and a fixing mechanism is provided on the main rods;

[0008] The fixing mechanism includes a first insert and a second insert. The first insert is fixedly connected to the top of the outer side of the main rod, and the second insert is fixedly connected to the bottom of the outer side of the main rod. A fixing ring is provided on the outside of the second insert. Movable grooves are provided at both ends of the main rod. A limiting block is integrally formed on the fixing ring. The limiting block extends into the movable groove and matches the movable groove. A fixing bolt is provided at the top of the second insert. The fixing bolt passes through the first insert and the second insert in sequence.

[0009] By adopting the above technical solution, after the standard section body is spliced ​​together, the second insert of the upper standard section body is attached to the top of the first insert of the lower standard section. At this time, after the fixing ring is placed downward and stably, the fixing ring is in contact with the outer surface of the first and second inserts. At this time, the fixing ring is located outside the gap after the first and second inserts are spliced, which can effectively restrict and fix the joint. This can prevent the splice of the first and second inserts from shifting due to shear force, thereby reducing the pressure on the fixing bolt position and improving the overall shear resistance.

[0010] Preferably, a nut is provided on the outside of the fixing bolt, and the fixing bolt passes through the nut and is connected to the nut by threads.

[0011] By adopting the above technical solution, after tightening the nut on the outside of the fixing bolt, a tight connection between the first and second inserts that are spliced ​​together is ensured.

[0012] Preferably, a rectangular plate is fixedly connected to the outside of the second insert, and an L-shaped plate is fixedly connected to the outside of the fixing ring. A slot is provided on the rectangular plate, and the L-shaped plate passes through the slot and matches the slot. Two first trapezoidal blocks and two second trapezoidal blocks are slidably connected inside the L-shaped plate.

[0013] By adopting the above technical solution, the fixing ring can be limited after the L-shaped plate passes through the slot.

[0014] Preferably, the first trapezoidal block is disposed on top of the second trapezoidal block, and both the first and second trapezoidal blocks extend beyond the L-shaped plate.

[0015] By adopting the above technical solution, the first trapezoidal block and the second trapezoidal block play an auxiliary limiting role.

[0016] Preferably, a first spring and a second spring are fixedly connected inside the L-shaped plate. The first spring is fixedly connected to one side of the first trapezoidal block, and the second spring is fixedly connected to one side of the second trapezoidal block.

[0017] By adopting the above technical solution, the first reed and the second reed exert elastic thrust on the first trapezoidal block and the second trapezoidal block, respectively.

[0018] Preferably, the fixing mechanism includes a stabilizing component, which includes an auxiliary frame and a limiting plate. The auxiliary frame and the limiting plate are both fixedly connected to the outside of the main rod. The auxiliary frame is located on one side of the second insert, and the limiting plate is located on one side of the first insert. Limiting grooves are provided on both the upper and lower crossbeams. An insert plate is slidably connected inside the auxiliary frame. The insert plate extends out of the auxiliary frame and passes through the limiting groove and matches the limiting groove.

[0019] By adopting the above technical solution, the overall stability of the device can be further improved after the insert plate passes through the limiting groove.

[0020] Preferably, a threaded adjusting rod is rotatably connected inside the auxiliary frame, the threaded adjusting rod extends out of the auxiliary frame, and the threaded adjusting rod passes through the top wall of the insert plate and is threadedly connected to the insert plate.

[0021] By adopting the above technical solution, the screw adjusting rod rotates and drives the insert plate to move up and down.

[0022] In summary, this utility model has the following beneficial technical effects:

[0023] 1. A tower crane standard section with strong shear resistance, through the design of a fixing mechanism, after the main body of the standard section is spliced ​​together, the second insert of the upper standard section is attached to the top of the first insert of the lower standard section. At this time, after the fixing ring is placed downward and stably, the fixing ring is in contact with the outer surface of the first and second inserts. At this time, the fixing ring is located outside the gap after the splicing of the first and second inserts, which can effectively restrict and fix the joint, and prevent the splicing of the first and second inserts from shifting under the action of shear force, thereby reducing the pressure on the fixing bolt position and improving the overall shear resistance.

[0024] 2. A tower crane standard section with strong shear resistance, through the design of a stabilizing component, controls the insertion plate to move through the lower crossbeam, upper crossbeam and limiting plate by rotating the threaded adjusting rod. This creates a locking effect between the lower crossbeam of the upper standard section body and the upper crossbeam of the lower standard section body, preventing misalignment between them and further improving the overall stability of the device. In conjunction with the fixing ring and fixing bolts, this fully ensures the stability of the standard section body after splicing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a cross-sectional view of the first and second inserts after they are joined together in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0028] Figure 4 This is a cross-sectional view of the fixed ring and the second insert after separation in this utility model;

[0029] Figure 5 for Figure 4 Enlarged view of point B in the image;

[0030] Figure 6 for Figure 4 Enlarged view of point C in the image;

[0031] Figure 7 This is a cross-sectional view of the L-shaped plate in this utility model;

[0032] Figure 8 for Figure 7 Enlarged view of point D in the image.

[0033] Explanation of reference numerals in the attached drawings: 1. Standard section body; 11. Main rod; 12. Upper crossbeam; 13. Lower crossbeam; 14. Middle beam rod; 15. Diagonal brace; 2. Fixing mechanism; 21. First insert; 22. Second insert; 23. Fixing ring; 24. Movable groove; 25. Limiting block; 26. Fixing bolt; 27. Nut; 28. Rectangular plate; 29. ​​L-shaped plate; 291. First trapezoidal locking block; 292. Second trapezoidal locking block; 293. First spring; 294. Second spring; 295. Auxiliary frame; 296. Limiting plate; 297. Limiting groove; 298. Insert plate; 299. Threaded adjusting rod. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 The present invention will be described in further detail below.

[0035] This utility model discloses a standard tower crane section with high shear resistance. (Refer to...) Figures 1-8 The system includes a standard section body 1, which includes four main rods 11. An upper crossbeam 12, a lower crossbeam 13, and a middle beam 14 are fixedly connected between adjacent main rods 11. The middle beam 14 is located between the upper crossbeam 12 and the lower crossbeam 13. A diagonal brace 15 is fixedly connected between the middle beam 14 and the upper crossbeam 12 and the lower crossbeam 13. A fixing mechanism 2 is provided on the main rods 11.

[0036] The fixing mechanism 2 includes a first insert 21 and a second insert 22. The first insert 21 is fixedly connected to the top of the outer side of the main rod 11, and the second insert 22 is fixedly connected to the bottom of the outer side of the main rod 11. A fixing ring 23 is provided on the outside of the second insert 22. Movable grooves 24 are provided at both ends of the main rod 11. A limit block 25 is integrally formed on the fixing ring 23.

[0037] The limiting block 25 extends into the movable groove 24 and matches the movable groove 24. The top of the second insert 22 is provided with a fixing bolt 26, which passes through the first insert 21 and the second insert 22 in sequence. After the standard section body is spliced ​​together, the second insert 22 of the upper standard section body is attached to the top of the first insert 21 of the lower standard section. At this time, after the fixing ring 23 is placed downward and stably, the fixing ring 23 is in contact with the outer surface of the first insert 21 and the second insert 22. At this time, the fixing ring 23 is located outside the gap after the first insert 21 and the second insert 22 are spliced, which can effectively restrict and fix the joint. This can prevent the splice of the first insert 21 and the second insert 22 from shifting due to shear force, thereby reducing the pressure on the fixing bolt 26 and improving the overall shear resistance.

[0038] A nut 27 is provided on the outside of the fixing bolt 26. The fixing bolt 26 passes through the nut 27 and is connected to the nut 27 by threads. After tightening the nut 27 on the outside of the fixing bolt 26, a tight connection is ensured between the first insert 21 and the second insert 22 that are spliced ​​together. A rectangular plate 28 is fixedly connected to the outside of the second insert 22. An L-shaped plate 29 is fixedly connected to the outside of the fixing ring 23. A slot is opened on the rectangular plate 28. The L-shaped plate 29 passes through the slot and matches the slot. Two first trapezoidal blocks 291 and two second trapezoidal blocks 292 are slidably connected inside the L-shaped plate 29. After the L-shaped plate 29 passes through the slot, it can limit the fixing ring 23.

[0039] The first trapezoidal locking block 291 is disposed on the top of the second trapezoidal locking block 292. Both the first trapezoidal locking block 291 and the second trapezoidal locking block 292 extend beyond the L-shaped plate 29. The first trapezoidal locking block 291 and the second trapezoidal locking block 292 serve as auxiliary limiting devices. The first spring 293 and the second spring 294 are fixedly connected inside the L-shaped plate 29. The first spring 293 is fixedly connected to one side of the first trapezoidal locking block 291, and the second spring 294 is fixedly connected to one side of the second trapezoidal locking block 292. The first spring 293 and the second spring 294 exert elastic pushing force on the first trapezoidal locking block 291 and the second trapezoidal locking block 292, respectively.

[0040] The fixing mechanism 2 includes a stabilizing component, which includes an auxiliary frame 295 and a limiting plate 296. Both the auxiliary frame 295 and the limiting plate 296 are fixedly connected to the outside of the main rod 11. The auxiliary frame 295 is located on one side of the second insert 22, and the limiting plate 296 is located on one side of the first insert 21. The upper crossbeam 12 and the lower crossbeam 13 are both provided with limiting grooves 297. An insert plate 298 is slidably connected inside the auxiliary frame 295. The insert plate 298 extends out of the auxiliary frame 295 and passes through the limiting groove 297 and matches the limiting groove 297. After the insert plate 298 passes through the limiting groove 297, it can further improve the overall stability of the device.

[0041] A threaded adjusting rod 299 is rotatably connected inside the auxiliary frame 295. The threaded adjusting rod 299 extends out of the auxiliary frame 295, passes through the top wall of the insert plate 298, and is threadedly connected to the insert plate 298. After the threaded adjusting rod 299 rotates, it drives the insert plate 298 to move up and down.

[0042] In actual operation, the first spring 293 and the second spring 294 exert elastic pushing force on the first trapezoidal block 291 and the second trapezoidal block 292 respectively, pushing the first trapezoidal block 291 and the second trapezoidal block 292 out of the L-shaped plate 29. When the standard section body is not spliced ​​vertically, the second trapezoidal block is above the rectangular plate 28, thereby limiting the fixing ring 23 and preventing the fixing ring 23 from falling downward. When it is necessary to splice the standard section body vertically, the second trapezoidal block 292 can be pinched into the L-shaped plate 29, and the L-shaped plate can be pressed down until the first trapezoidal block 291 is below the rectangular plate 28. At this time, the fixing ring 23 simultaneously touches the bottom of the movable groove 24 at the top of the main rod 11 of the standard section body below, and the first trapezoidal block 291 contacts the bottom of the rectangular plate 28, which can also limit the fixing ring 23 to avoid the fixing ring 23 from shaking vertically due to external factors such as strong winds or swaying at high altitudes, thus affecting the fixing work.

[0043] Specifically, after the standard section bodies are spliced ​​together vertically, the second insert 22 of the upper standard section body is fitted to the top of the first insert 21 of the lower standard section. At this time, the fixing bolt 26 is inserted from above the first insert 21 through the first insert 21 and the second insert 22, and the nut 27 is tightened on the outside of the fixing bolt 26. This completes the splicing of the upper and lower standard section bodies. After the splicing is completed, in order to reduce the shear force on the fixing bolt 26, the above operation is repeated to loosen the fixing ring 23 downwards until it touches the bottom of the movable groove. After 24 is inside, the fixing ring 23 is located on the outside of the splice of the first insert 21 and the second insert 22. At this time, the fixing ring 23 is in close contact with the outside of the first insert 21 and the second insert 22. Therefore, the fixing ring 23 can effectively prevent the splice from being unstable due to factors such as shaking between the first insert 21 and the second insert 22. Since the fixing ring 23 acts directly on the outside of the first insert 21 and the second insert 22, it mainly relies on its own strength to provide support, which has a greater support strength and effectively improves the overall shear resistance of the device.

[0044] Finally, based on the above fixation, rotate the threaded adjusting rod 299. The threaded adjusting rod 299 drives the insert plate 298 to move. After the insert plate 298 moves to pass through the lower crossbeam 13, upper crossbeam 12 and limiting plate 296, it can form a locking effect between the lower crossbeam 13 of the upper standard section body and the upper crossbeam 12 of the lower standard section body, which can prevent the two from shifting and further improve the overall stability of the device. In conjunction with the fixing ring 23 and fixing bolt 26, it can fully guarantee the stability of the standard section body after splicing.

[0045] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A tower crane standard section having high shear strength, characterized in that: The utility model provides a standard section body (1) including four main bars (11), are fixedly connected with upper crossbeam (12), lower crossbeam (13) and middle beam (14) between adjacent main bars (11) respectively, the middle beam (14) is arranged between upper crossbeam (12) and lower crossbeam (13), and the middle beam (14) is fixedly connected with inclined bracing (15) between upper crossbeam (12) and lower crossbeam (13) respectively, and the main bar (11) is provided with fixed mechanism (2) on the setting, The fixed mechanism (2) includes first insert cylinder (21) and second insert cylinder (22), the first insert cylinder (21) is fixedly connected on the outside top of main bar (11), the second insert cylinder (22) is fixedly connected on the outside bottom of main bar (11), the second insert cylinder (22) is provided with fixed ring (23) outside, both ends of main bar (11) are provided with movable slot (24), the fixed ring (23) is integrally formed with limit block (25), the limit block (25) extends into movable slot (24) and is matched with movable slot (24), the second insert cylinder (22) is provided with fixed bolt (26) on the top, the fixed bolt (26) is threaded through first insert cylinder (21) and second insert cylinder (22) in proper order.

2. The tower crane standard segment of claim 1, wherein: The fixed bolt (26) is provided with nut (27) outside, and the fixed bolt (26) is threaded through the nut (27) and connected with the nut (27) by screw thread.

3. The tower crane standard segment of claim 1, wherein: The second insert cylinder (22) is fixedly connected with rectangular plate (28) outside, the fixed ring (23) is fixedly connected with L-shaped plate (29) outside, the rectangular plate (28) is provided with slot, the L-shaped plate (29) is threaded through the slot and matched with the slot, and the L-shaped plate (29) is slidably connected with two first trapezoidal clamping blocks (291) and two second trapezoidal clamping blocks (292) inside.

4. The tower crane standard segment of claim 3, wherein: The first trapezoidal clamping block (291) is arranged on the top of the second trapezoidal clamping block (292), and the first trapezoidal clamping block (291) and the second trapezoidal clamping block (292) extend outside the L-shaped plate (29).

5. The tower crane standard segment of claim 3, wherein: The L-shaped plate (29) is fixedly connected with a first reed (293) and a second reed (294) inside, the first reed (293) is fixedly connected to one side of the first trapezoidal clamping block (291), and the second reed (294) is fixedly connected to one side of the second trapezoidal clamping block (292).

6. The tower crane standard segment of claim 1, wherein: The fixed mechanism (2) includes a stabilizing assembly, which includes an auxiliary frame (295) and a limiting plate (296), the auxiliary frame (295) and the limiting plate (296) are fixedly connected to the outside of the main bar (11), the auxiliary frame (295) is arranged on one side of the second insert cylinder (22), the limiting plate (296) is arranged on one side of the first insert cylinder (21), the upper crossbeam (12) and the lower crossbeam (13) are provided with a limiting slot (297), the auxiliary frame (295) is slidably connected with an insert plate (298) inside, the insert plate (298) extends outside the auxiliary frame (295), and the insert plate (298) is threaded through the limiting slot (297) and matched with the limiting slot (297).

7. The strong-against-shearing tower crane standard segment of claim 6, wherein: The auxiliary frame (295) is internally rotatably connected with a threaded adjusting rod (299), the threaded adjusting rod (299) extends out of the auxiliary frame (295), and the threaded adjusting rod (299) penetrates the top wall of the insertion plate (298) and is connected with the insertion plate (298) through threads.

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