A double lug nut dismounting tool for disc buckle type scaffold support

Abstract

The utility model provides a kind of double lug nut dismounting tool for disc buckle type scaffold support, belong to scaffold construction auxiliary equipment technical field, technical scheme is, a kind of double lug nut dismounting tool for disc buckle type scaffold support, including installation cylinder, the inside fixed of installation cylinder is the limit cylinder of two ends opening, limit cylinder is coaxially arranged with installation cylinder, one end of installation cylinder is closed end, the other end is open end, the closed end of installation cylinder is fixedly connected with the one end of connecting rod, the other end of connecting rod can be inserted in the installation slot of electric wrench, connecting rod is coaxially arranged with installation cylinder, and the outer wall of installation cylinder near open end is provided with at least one group of driving assembly. Advantage lies in, this tool is evenly ensured by symmetrical distribution driving assembly stress, effectively avoid the problem that double lug nut or screw rod is damaged in dismounting process.

Description

Technical Field

[0001] This utility model belongs to the technical field of scaffolding construction auxiliary equipment, specifically relating to a double-ear nut disassembly tool for disc-type scaffolding supports. Background Technology

[0002] In the construction industry, the supports of disc-lock scaffolding are key components that bear the loads of the formwork system and the superstructure. The double-eared nuts, as the core adjusting components on the support screws, directly affect the turnover efficiency and construction safety of the scaffolding due to the efficiency and quality of their disassembly. The height adjustment of disc-lock scaffolding supports and the recycling and reuse of components both depend on the smooth disassembly of the double-eared nuts. Especially in large-scale construction projects, where the scaffold structure is enormous, the disassembly of the double-eared nuts involves a huge workload, and its operational efficiency directly affects the progress of the construction schedule.

[0003] Currently, during concrete pouring operations, concrete slurry easily splashes or leaks into the gap between the support rod and the double-eared nut, forming residue. This residue, after embedding in the rod threads, hardens and bonds tightly to the nut, causing the nut and rod to form a rigid unit that is difficult to disassemble using conventional rotation. Existing processes commonly employ manual tapping, repeatedly striking the ears of the double-eared nut with a hammer or similar tool. The impact force causes slight vibrations in the nut, breaking down the strength of the concrete bond layer and loosening the nut, which is then disassembled using a wrench or similar tool.

[0004] However, the impact load generated by hammering is instantaneous and uncontrollable, and can easily be transmitted to the lead screw thread. The lead screw thread is a precision load-bearing structure, and impact loads may cause thread deformation, stripping, or even breakage, seriously affecting the load-bearing performance of the support and creating safety hazards. Utility Model Content

[0005] This utility model addresses the problem that hammering double-eared nuts can easily damage the nuts or lead screws when disassembling them. It provides a disc-lock type scaffold support double-eared nut disassembly tool that can apply force evenly to the double-eared nuts, thereby avoiding damage to the nuts or lead screws.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: a double-ear nut disassembly tool for disc-lock scaffold supports, including an installation cylinder, a limiting cylinder with open ends fixed inside the installation cylinder, the limiting cylinder and the installation cylinder being coaxially arranged, one end of the installation cylinder being a closed end and the other end being an open end, the closed end of the installation cylinder being fixedly connected to one end of a connecting rod, the other end of the connecting rod being able to be inserted into the mounting groove of an electric wrench, the connecting rod and the installation cylinder being coaxially arranged, at least one set of driving components being provided on the outer wall of the installation cylinder near the open end, each set of driving components including two driving rods, the two driving rods being symmetrical with respect to the axis of the installation cylinder, and the lower ends of the two driving rods being fixedly connected to the outer wall of the installation cylinder near the open end.

[0007] In this technical solution, a limiting cylinder with openings at both ends is fixed inside the mounting cylinder, and the limiting cylinder is coaxially arranged with the mounting cylinder. One end of the mounting cylinder is a closed end, and the other end is an open end. The closed end is fixedly connected to one end of a connecting rod, and the connecting rod is coaxially arranged with the mounting cylinder. At least one set of driving components is provided on the outer wall of the mounting cylinder near the open end. Each set of driving components includes two driving rods, which are symmetrical with respect to the axis of the mounting cylinder, and the lower ends of both are fixedly connected to the outer wall of the mounting cylinder near the open end. In use, the screw of the disc-lock scaffold support is inserted into the limiting cylinder until the upper ends of the two driving rods overlap with the two ears of the double-ear nut. Then, the end of the connecting rod is inserted into the mounting groove of the electric wrench. The electric wrench drives the connecting rod, the mounting cylinder, and the driving rod to rotate synchronously, so that the driving rod applies force evenly to the ears of the double-ear nut to remove the double-ear nut. Thus, this tool can apply force evenly to the double-ear nut, thereby avoiding damage to the double-ear nut or the screw.

[0008] Furthermore, a groove is provided on the upper outer surface of the drive rod, and the groove is arc-shaped. When the lugs of the double-ear nut are engaged in the groove, the arc surface can form a close contact with the lug surface, increasing the force-bearing area. At the same time, the lateral limiting effect of the groove prevents relative sliding between the lugs and the drive rod during the application of force, ensuring stable torque transmission. The outline of the groove can serve as a visual indicator of proper installation. Workers can quickly judge the alignment of the drive rod and the double-ear nut by whether the lugs are fully engaged in the groove, ensuring that the mounting cylinder is in the preset working position and improving operational convenience.

[0009] Furthermore, an anti-slip pad is fixed inside the groove. The anti-slip pad increases the coefficient of friction between the groove and the lugs of the double-ear nut, further enhancing the tightness of their fit. When the drive rod transmits torque, the friction counteracts the relative sliding tendency, preventing slippage caused by smooth lug surfaces or uneven force, making the force application more stable and reliable. The elastic properties of the anti-slip pad buffer the rigid contact between the lugs and the groove, reducing wear between metal parts. At the same time, when there are slight deviations in the lug dimensions, the pad compensates for the gap through its own deformation, ensuring effective engagement under different working conditions and improving structural adaptability.

[0010] Furthermore, a dustproof ring is fixed to the open end of the mounting cylinder, and the dustproof ring is made of elastic material. The elastic dustproof ring at the open end of the mounting cylinder can effectively prevent external dust, concrete residue and other debris from entering the interior of the mounting cylinder, avoiding the accumulation of impurities that may affect the fitting accuracy of internal parts or cause wear. In addition, the properties of the elastic material give it a certain degree of deformation capability. When different sizes of limiting cylinders are replaced, the dustproof ring can adapt to the slight differences in the outer diameter of the limiting cylinder through its own elasticity, always maintaining a tight fit with the outer surface of the limiting cylinder, ensuring a reliable sealing effect under various specifications, and maintaining the cleanliness and structural stability of the interior of the mounting cylinder.

[0011] Furthermore, two limiting holes penetrating the limiting cylinder are provided on the lower outer circular surface of the limiting cylinder. The two limiting holes are staggered in height along the axial direction of the limiting cylinder, and their center lines are perpendicular to each other and perpendicular to the axis of the limiting cylinder. Two mounting holes penetrating the mounting cylinder are provided on the outer circular surface of the mounting cylinder. The two mounting holes are respectively opposite to the two limiting holes, and each mounting hole is fitted with a locking bolt that penetrates the mounting hole and the corresponding limiting hole. The design of the two limiting holes on the lower outer circular surface of the limiting cylinder and the two mounting holes on the outer circular surface of the mounting cylinder, along with the locking bolts, ensures the coaxiality of the mounting cylinder and the limiting cylinder through multiple structural constraints: the two limiting holes are staggered in height along the axial direction and their center lines are perpendicular to each other, and both are perpendicular to the axis of the limiting cylinder. The corresponding mounting holes are opposite to the limiting holes. When the locking bolts penetrate the mounting holes and the corresponding limiting holes, it is equivalent to cross-fixing the limiting cylinder from two vertical directions and different axial positions. This bidirectional misalignment locking method can spatially limit the radial offset or tilt of the limiting cylinder, avoiding gaps or shaking that may occur when fixed in one direction, thereby stably maintaining the coaxial setting of the limiting cylinder and the mounting cylinder, providing a structural basis for the subsequent drive components to apply precise force to the double-eared nuts.

[0012] Furthermore, the connecting rod has a regular hexagonal cross-section. The core advantage of designing the connecting rod with a regular hexagonal cross-section is that it precisely matches the shape of the electric wrench mounting slot: the regular hexagonal structure has multiple sets of parallel opposite sides and symmetrical edges, which can completely fit the inner hexagonal contour of the electric wrench mounting slot, ensuring that the two will not rotate relative to each other when transmitting torque.

[0013] Furthermore, two handles are fixed on the outer wall of the mounting cylinder, and the two handles are symmetrically distributed with respect to the axis of the mounting cylinder. The symmetrical layout of the two handles allows the force to be evenly applied to both sides of the mounting cylinder when the operator applies force with both hands, preventing the mounting cylinder from tilting or shaking due to force applied on one side. Especially when adjusting the installation position or bearing reaction force, it can more stably maintain the axial alignment of the mounting cylinder and reduce operational deviations.

[0014] Furthermore, each handle is fitted with a cushioning pad. The surface of the cushioning pad often has a fine texture to increase the coefficient of friction between the hand and the handle, preventing the equipment from accidentally falling off due to slippage during operation. At the same time, the elastic material can absorb minor vibrations or impacts generated during operation, reducing the irritation to the hand from the reaction force and improving operational stability.

[0015] As can be seen from the above technical solution, the advantages of this utility model are as follows: In this technical solution, the mounting cylinder adopts a structure design with one end closed and the other end open, and a limiting cylinder with both ends open is coaxially fixed inside. The closed end of the mounting cylinder is coaxially fixedly connected to one end of the connecting rod, and the end of the connecting rod can be inserted into the mounting groove of the electric wrench. At least one set of symmetrically distributed drive components is provided on the outer wall of the mounting cylinder near the open end. Each set of drive components includes two symmetrically arranged drive rods, the lower ends of which are fixedly connected to the outer wall of the mounting cylinder. The screw of the disc-lock scaffold support is inserted into the limiting cylinder until the upper ends of the two drive rods respectively overlap with the two ears of the double-ear nut. The electric wrench drives the connecting rod, mounting cylinder and drive rod to rotate synchronously, so that the drive rod applies a uniform force to the ears of the double-ear nut, thereby realizing the disassembly of the double-ear nut. In summary, this tool ensures uniform force distribution through symmetrically distributed drive components, effectively avoiding the problem of damage to the double-ear nut or screw during disassembly. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 This is a top view schematic diagram of a specific embodiment of the present utility model; Figure 3 This is a schematic diagram of the usage state structure of a specific embodiment of the present utility model; Figure 4 This is a cross-sectional view of the usage state of a specific embodiment of the present invention.

[0018] In the diagram: 1. Disc-lock scaffold support; 11. Screw rod; 2. Double-eared nut; 21. Ear; 3. Mounting cylinder; 31. Dustproof ring; 32. Mounting hole; 33. Locking bolt; 34. Handle; 341. Buffer pad; 4. Limiting cylinder; 41. Limiting hole; 5. Connecting rod; 6. Drive assembly; 61. Drive rod; 611. Groove; 612. Anti-slip pad. Detailed Implementation

[0019] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0020] A tool for disassembling double-eared nuts for disc-lock scaffold supports, such as Figure 1-2 As shown, the device includes a mounting cylinder 3, inside which a limiting cylinder 4 with openings at both ends is fixed. The limiting cylinder 4 and the mounting cylinder 3 are coaxially arranged. One end of the mounting cylinder 3 is closed, and the other end is open. The closed end of the mounting cylinder 3 is fixedly connected to one end of a connecting rod 5 by welding. The other end of the connecting rod 5 can be inserted into the mounting slot of the electric wrench, and the connecting rod 5 and the mounting cylinder 3 are coaxially arranged. At least one set of driving components 6 is provided on the outer wall of the mounting cylinder 3 near the open end. Each set of driving components 6 can apply a uniform force to the ears 21 of the double-eared nut 2, thereby realizing the disassembly operation of the double-eared nut 2.

[0021] In this specific embodiment, two sets of drive components 6 are provided, each set including two drive rods 61. The two drive rods 61 are symmetrical with respect to the axis of the mounting cylinder 3, and both drive rods 61 extend gradually from bottom to top away from the mounting cylinder 3. Their lower ends are welded and fixed to the outer wall of the mounting cylinder 3 near the opening, while their upper ends extend to the top of the mounting cylinder 3. The distance by which the drive rods 61 of the two sets of drive components 6 extend away from the mounting cylinder 3 differs, with one set of drive rods 61 extending a greater distance than the other. This difference in specifications allows for the adaptation of different sizes of double-eared nuts 2.

[0022] A groove 611 is formed on the outer surface of the upper end of the drive rod 61. The groove 611 is arc-shaped, and its center line is horizontal. The shape of the groove 611 is adapted to the shape of the ear 21 of the double-ear nut 2. In this embodiment, the ear 21 of the double-ear nut 2 is a cylindrical rod. An anti-slip pad 612 is fixed in the groove 611 by adhesive bonding. The anti-slip pad 612 can increase the friction coefficient between the groove 611 and the ear 21 of the double-ear nut 2, effectively avoiding slippage caused by the smooth surface of the ear 21 of the double-ear nut 2 or uneven force.

[0023] A dustproof ring 31 is fixed to the open end of the mounting cylinder 3 by adhesive bonding. The dustproof ring 31 is coaxially arranged with the mounting cylinder 3, and the inner diameter of the dustproof ring 31 is smaller than the outer diameter of the limiting cylinder 4. The dustproof ring 31 is made of elastic material. This design allows the dustproof ring 31 to adapt to the outer wall of the limiting cylinder 4 through its own deformation when replacing the limiting cylinder 4 of different specifications and installing it into the mounting cylinder 3, thus maintaining a good fit at all times.

[0024] The specifications of the limiting cylinder 4 are selected according to the diameter of the screw rod 11 of the disc-lock scaffold support 1 to ensure that the screw rod 11 will not wobble after being inserted into the limiting cylinder 4. Two limiting holes 41 are opened on the outer circular surface of the lower end of the limiting cylinder 4, which are staggered in height along the axial direction of the limiting cylinder 4, and the center lines of the two limiting holes 41 are perpendicular to each other. At the same time, the center lines of the two limiting holes 41 are perpendicular to the axis of the limiting cylinder 4. Two mounting holes 32 are correspondingly opened on the outer circular surface of the mounting cylinder 3, which are opposite to the positions of the two limiting holes 41. A locking bolt 33 is installed in each mounting hole 32. The shank of the locking bolt 33 is inserted from one end of the mounting hole 32, passes through the corresponding limiting hole 41, and exits from the other end of the mounting hole 32, and is then fixed by a nut. When both locking bolts 33 are fixed on the mounting cylinder 3, they can form a cross-shaped limit on the limiting cylinder 4, thereby firmly fixing the limiting cylinder 4 inside the mounting cylinder 3 and ensuring that the limiting cylinder 4 and the mounting cylinder 3 remain coaxial.

[0025] The connecting rod 5 is a vertical rod with a regular hexagonal cross-section, which can precisely match the shape of the electric wrench mounting slot and fit perfectly with the inner hexagonal contour of the mounting slot, ensuring that the two do not rotate relative to each other when transmitting torque.

[0026] Two handles 34 are welded on the outer wall of the mounting cylinder 3. The two handles 34 are located below the locking bolt 33 and are symmetrically distributed with respect to the axis of the mounting cylinder 3. Each handle 34 is fitted with a buffer pad 341.

[0027] The usage process of this utility model is as follows: Figure 3-4As shown, firstly, based on the diameter of the lead screw 11 of the disc-lock scaffold support 1, a matching limiting cylinder 4 is selected to ensure that the inner diameter of the limiting cylinder 4 matches the diameter of the lead screw 11, laying the foundation for stable limiting after the lead screw 11 is inserted. Then, the selected limiting cylinder 4 is smoothly pushed into the installation cylinder 3 from the open end. Next, the locking bolt 33 is taken, and its rod is inserted axially from one end of the mounting hole 32, passing through the mounting hole 32 of the installation cylinder 3 and the corresponding limiting hole 41 on the limiting cylinder 4, before exiting from the other end of the mounting hole 32. A nut is then fitted onto the bolt's exit end and tightened to secure the bolt tightly to the installation cylinder 3. After both locking bolts 33 are installed and tightened in this manner, the two sets of bolts form a cross-shaped limit on the limiting cylinder 4 from mutually perpendicular directions and different axial positions. This not only securely locks the limiting cylinder 4 inside the mounting cylinder 3, but also strictly ensures the coaxiality of the limiting cylinder 4 and the mounting cylinder 3, avoiding force deviation caused by the offset of the two during subsequent operations.

[0028] After assembling the limiting cylinder 4, the worker holds the two handles 34 on the outer wall of the mounting cylinder 3 with both hands and moves the entire tool directly under the disc-lock scaffold support 1. Then, the worker lifts the mounting cylinder 3 upwards with both hands, aligning the lead screw 11 of the support with the open end of the limiting cylinder 4 and gradually inserting it. As the mounting cylinder 3 continues to move upwards, the lead screw 11 penetrates deeper into the cylinder along the axis of the limiting cylinder 4 until the two ears 21 of the double-ear nut 2 are precisely engaged in the arc-shaped groove 611 at the upper end of the drive rod 61. At this time, the ears 21 are in close contact with the anti-slip pad 612 in the groove 611. The worker can confirm the alignment by touch or sight and determine that the tool has reached the predetermined working position. Next, the lower end of the connecting rod 5 is precisely inserted into the inner hexagonal mounting groove of the electric wrench, ensuring that the two are fully engaged without gaps. After the electric wrench is started, its output torque is transmitted to the connecting rod 5 through the mounting groove, which drives the mounting cylinder 3 and the drive rod 61 on the outer wall to rotate synchronously. The drive rod 61 applies a uniform and continuous rotational force to the ear 21 of the double-ear nut 2 through the groove 611, and gradually loosens and finally removes the double-ear nut 2 while avoiding impact load.

[0029] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: In this specific embodiment, the mounting cylinder adopts a structure design with one end closed and the other end open, and a limiting cylinder with both ends open is coaxially fixed inside. The closed end of the mounting cylinder is coaxially fixedly connected to one end of the connecting rod, and the end of the connecting rod can be inserted into the mounting groove of the electric wrench. At least one set of symmetrically distributed drive components is provided on the outer wall of the mounting cylinder near the open end. Each set of drive components includes two symmetrically arranged drive rods, the lower ends of which are fixedly connected to the outer wall of the mounting cylinder. The screw of the disc-lock scaffold support is inserted into the limiting cylinder until the upper ends of the two drive rods respectively overlap with the two ears of the double-ear nut. The electric wrench drives the connecting rod, mounting cylinder and drive rod to rotate synchronously, so that the drive rod applies a uniform force to the ears of the double-ear nut, thereby realizing the disassembly of the double-ear nut. In summary, this tool ensures uniform force through the symmetrically distributed drive components, effectively avoiding the problem of damage to the double-ear nut or screw during disassembly.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tool for disassembling double-eared nuts for disc-lock scaffold supports, comprising an installation cylinder (3), characterized in that, The mounting cylinder (3) has a limiting cylinder (4) with openings at both ends fixed inside. The limiting cylinder (4) is coaxial with the mounting cylinder (3). One end of the mounting cylinder (3) is closed and the other end is open. The closed end of the mounting cylinder (3) is fixedly connected to one end of the connecting rod (5). The other end of the connecting rod (5) can be inserted into the mounting slot of the electric wrench. The connecting rod (5) is coaxial with the mounting cylinder (3). At least one set of drive components (6) is provided on the outer wall of the mounting cylinder (3) near the open end. Each set of drive components (6) includes two drive rods (61). The two drive rods (61) are symmetrical with respect to the axis of the mounting cylinder (3), and the lower ends of the two drive rods (61) are fixedly connected to the outer wall of the mounting cylinder (3) near the open end.

2. The tool for disassembling double-eared nuts for disc-lock scaffold supports according to claim 1, characterized in that, A groove (611) is provided on the outer circular surface of the upper end of the drive rod (61), and the groove (611) is set in an arc shape.

3. The tool for disassembling double-eared nuts for disc-lock scaffold supports according to claim 2, characterized in that, An anti-slip pad (612) is fixed inside the groove (611).

4. The tool for disassembling double-eared nuts for disc-lock scaffold supports according to claim 1, characterized in that, The open end of the mounting cylinder (3) is fixed with a dustproof ring (31), which is made of elastic material.

5. The tool for disassembling double-eared nuts for disc-lock scaffold supports according to claim 1, characterized in that, Two limiting holes (41) are provided on the lower outer circular surface of the limiting cylinder (4). The two limiting holes (41) are staggered along the axial direction of the limiting cylinder (4). The center lines of the two limiting holes (41) are perpendicular to each other, and the center lines of the two limiting holes (41) are perpendicular to the axis of the limiting cylinder (4). Two mounting holes (32) are provided on the outer circular surface of the mounting cylinder (3). The two mounting holes (32) are respectively opposite to the two limiting holes (41). Each mounting hole (32) is equipped with a locking bolt (33) that passes through the mounting hole (32) and the corresponding limiting hole (41).

6. The tool for disassembling double-eared nuts for disc-lock scaffold supports according to claim 1, characterized in that, The cross-section of the connecting rod (5) is a regular hexagon.

7. The tool for disassembling double-eared nuts for disc-lock scaffold supports according to claim 1, characterized in that, Two handles (34) are fixed on the outer wall of the mounting cylinder (3), and the two handles (34) are symmetrically distributed with respect to the axis of the mounting cylinder (3).

8. The tool for disassembling double-eared nuts for disc-lock scaffold supports according to claim 7, characterized in that, Each handle (34) is fitted with a cushioning pad (341) on the outside.

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