A 90° corner lifting screw assembly for iron sheet

Abstract

The application relates to the field of connecting fasteners, in particular to a 90-degree corner lifting screw assembly for an iron plate, which comprises a fitting bolt, a fitting expansion pipe threaded to the fitting bolt and used for penetrating the iron plate, a fitting nut connected to the head of the fitting bolt and used for threaded connection with a screw rod connected to a base material to be lifted, a square piece is formed at the end of the fitting expansion pipe close to the fitting nut, the side of the square piece away from the fitting expansion pipe is used for abutting against the iron plate, the fitting expansion pipe is formed with a deformation section and a threaded section, the threaded section is threaded to the fitting bolt, the threaded section is located at the side of the deformation section away from the square piece, so that the outer diameter of the deformation section is expanded to clamp the square piece to the iron plate when the square piece position is limited and the threaded section moves towards the square piece, and the iron plate with a relatively thin thickness is stably lifted.

Description

Technical Field

[0001] This application relates to the field of fasteners, and more particularly to a 90° corner lifting screw assembly for iron plates. Background Technology

[0002] In the construction of building electromechanical installation, steel structure ceiling, pipeline support and hanger, fire protection system and other projects, it is necessary to hoist the base materials such as steel structure purlins and profiled steel sheets on iron plates. Generally, 90° angle hoisting screws are used to hoist the screws parallel to the iron plate, and then the screws are connected to the corresponding base materials.

[0003] Some existing 90° lifting screws are generally fixed by using self-tapping screws on the plane to be lifted. The head of the self-tapping screw has a radially formed threaded hole, and then the screw is screwed into the threaded hole of the self-tapping screw head to connect and fix it. See the anchoring device with publication number CN100334363C for reference.

[0004] However, when the self-tapping screws mentioned above are installed on thinner iron plates (2-4mm thick), the number of effective engaged threads is small, resulting in a smaller connection force between the self-tapping screw and the iron plate. When subjected to the large bending moment and external force from the suspended substrate, the threaded hole of the iron plate is easily pulled out, causing the self-tapping screw to be pulled out as a whole, which cannot provide sufficient lifting force to the suspended substrate. Summary of the Invention

[0005] To provide a stable lifting mechanism for thin iron plates, this application provides a 90° corner lifting screw assembly for iron plates.

[0006] The technical solution provided in this application for a 90° corner lifting screw assembly for iron plates is as follows.

[0007] A 90° angle lifting screw assembly for iron plates includes a fitting bolt, a fitting expansion tube threaded to the fitting bolt and used for passing through the iron plate, and a fitting nut connected to the head of the fitting bolt and for threaded connection with a screw rod to be connected to the substrate to be lifted. The fitting expansion tube has a square member formed at one end near the fitting nut. The side of the square member away from the fitting expansion tube is used to abut against the iron plate. The fitting expansion tube has a deformation section and a threaded section. The threaded section is threaded to the fitting bolt and is located on the side of the deformation section away from the square member. When the position of the square member is defined and the threaded section moves toward the square member, the outer diameter of the deformation section expands to cooperate with the square member to clamp the iron plate.

[0008] By adopting the above technical solution, the deformation section is first inserted into the iron plate, and then the threaded section and the expansion tube of the accessory are close to the square part, so that the deformation section will bend and deform and cannot pass through the opening of the iron plate. This makes the iron plate tightly pressed against the square part by the deformation section, thereby fixing the position of the accessory bolt and the accessory expansion tube relative to the iron plate, so as to achieve the stable hoisting operation of the thin iron plate.

[0009] Optionally, the deformable segment is formed with several segment openings around its own axis, and the portion of the deformable segment located between two adjacent segment openings is arc-shaped and bends away from the axis of the deformable segment.

[0010] By adopting the above technical solution, the deformation section can be smoothly expanded to the side away from the axis of the expansion tube of the accessory, thereby pressing the deformation section tightly against the iron plate, thus successfully fixing the position of the expansion tube of the accessory on the iron plate.

[0011] Optionally, the accessory nut has an internal opening formed inside for the accessory bolt head to fit into, and the shape of the nut internal opening is polygonal, corresponding to the shape of the accessory bolt head.

[0012] By adopting the above technical solution, the inner opening of the accessory nut is fitted into the head of the accessory bolt, so that the rotation of the accessory nut can drive the rotation of the accessory bolt. In addition to serving the function of connecting with the screw, the accessory nut can also allow the accessory bolt to rotate to achieve the fastening between the accessory expansion tube and the iron plate.

[0013] Optionally, the opening for the fitting nut to accommodate the fitting bolt head is a corner opening, which is formed on the end and side of the fitting nut to allow for adjustment between the fitting nut and the fitting bolt within a range of 0-90°.

[0014] By adopting the above technical solution, the angle of the accessory nut can be adjusted to a large extent, and even if there is a certain angle deviation of the connected screw, the accessory bolt will not be subjected to a large bending moment, so that the connection between the accessory expansion tube and the iron plate is not easily subjected to excessive bending moment, thus making the hoisting stable and effective.

[0015] Optionally, the corner opening includes a port located at the end face of the fitting nut and a side opening connected to the port. The side opening is located around the periphery and side of the end face of the fitting nut. The central angle corresponding to the connection between the port and the side opening is less than 180°. The fitting bolt is formed with a limiting piece. The diameter of the limiting piece is consistent with the diameter of the port to limit the shaking of the fitting bolt.

[0016] By adopting the above technical solution, when the fitting nut drives the fitting bolt to rotate and is subjected to bending moment, the limiting piece can abut against the inner ring of the port, thereby making it less likely for the fitting nut and fitting bolt to wobble, and making the fitting bolt with a certain length less likely to bend during the installation process.

[0017] Optionally, the limiting piece is used to abut against the four square parts, and when the limiting piece abuts against the four square parts, the head of the accessory bolt can enter the inner opening of the nut.

[0018] By adopting the above technical solution, the limiting plate can restrict the movement of the square part, so that during the rotation of the accessory nut, the accessory nut does not need to apply pressure to the square part to force the deformation section to produce the corresponding deformation smoothly, simplifying the installation work and effectively reducing the installation difficulty.

[0019] Optionally, the width of the side opening is greater as it gets closer to the port, and the fitting bolt rod can fit against the inner wall of the side opening away from the port.

[0020] By adopting the above technical solution, when the fitting expansion tube is fixedly installed and the fitting nut is rotated to perform 90° angle hoisting, the hoisting position needs to be adjusted multiple times, that is, the fitting nut needs to be rotated multiple times. The gradual opening design of the side opening can effectively reduce the wear between the fitting bolt and the side opening, and ensure that the fitting bolt and the fitting nut can rotate smoothly.

[0021] Optionally, the inner diameter of the square part of the accessory expansion tube is larger than the outer diameter of the threaded section, and the accessory bolt is formed with an anti-sway section for tightly fitting one end of the square part of the accessory expansion tube.

[0022] By adopting the above technical solution, in order to facilitate the passage of the expansion tube through the threaded section of the bolt, the inner diameter of one end of the square part of the expansion tube needs to be set to be larger. When the expansion tube is connected to the threaded section at the end away from the square part, there is a large gap between the inner wall of the square part of the expansion tube and the bolt. This makes it less likely for the bolt to bend relative to the expansion tube when it is subjected to uneven bending moment during the rotation of the bolt. It also helps the expansion tube to avoid tilting relative to the thinner iron plate. This allows the radial component of the force borne by the bolt during rotation to be effectively transmitted radially to the expansion tube and the iron plate.

[0023] Optionally, the diameter of the threaded connection of the accessory nut to the screw is smaller than the diameter of the inscribed circle of the nut's inner opening.

[0024] By adopting the above technical solution, after the fitting bolt is placed into the fitting nut and the end of the fitting nut is stamped and closed, one end of the fitting bolt head cannot fall out from the threaded connection of the fitting nut and the screw rod. This ensures that even when a large number of fitting bolts and fitting nuts are stored together or during installation, the fitting bolts and fitting nuts are not easily separated, even if the expansion tube has not yet been connected to the fitting bolt.

[0025] Optionally, the outer wall of the accessory nut is formed with a hexagonal segment that facilitates rotation under force, and the diameter of the inscribed circle around the hexagonal segment is equal to the diameter of the part of the accessory nut excluding the hexagonal segment.

[0026] By adopting the above technical solution, the connection area between the hexagonal segment and the part of the accessory nut into which the accessory bolt head is placed is as large as possible, so that the strength of the accessory nut itself is better guaranteed. When using external tools such as hexagonal sockets to rotate the accessory nut, the hexagonal sockets can also be directly fitted into the non-hexagonal segment of the accessory nut, so that the accessory nut as a whole can withstand a large bending moment and the weld between the hexagonal segment and the non-hexagonal segment of the accessory nut is not easily damaged.

[0027] In summary, this application includes at least the following beneficial effects.

[0028] The method of clamping the iron plate using deformation sections and square parts enables the hoisting of thin iron plates; the accessory nuts and bolts can easily and flexibly rotate at a 90° angle, and after hoisting, it is not easy to generate a large bending moment on the accessory bolts, ensuring hoisting stability and better adapting to hoisting work with certain angular errors; the presence of limit plates and anti-sway sections ensures that the hoisting screw assembly can be evenly stressed during the rotation of the accessory nuts, better transferring force and bending moment to the iron plate, so that even during the installation of mixing iron plates, the hoisting screw assembly is less likely to tilt relative to thinner iron plates. Attached Figure Description

[0029] Figure 1 This is a structural diagram showing the state where the axis of the accessory nut and the accessory bolt are the same and the deformation section is not deformed.

[0030] Figure 2 This is a schematic diagram of the structure where the axes of the accessory nut and accessory bolt are at 90° and the deformed section is deformed.

[0031] Figure 3 (a) is a cross-sectional view of the fitting nut, and (b) is a structural schematic diagram of the fitting bolt;

[0032] Figure 4 (a) is a partial physical image showing the shape of the side opening and port when the axes of the fitting nut and fitting bolt are the same, and (b) is a partial physical image showing the shape of the side opening and port when the axes of the fitting nut and fitting bolt are at 90°.

[0033] Explanation of reference numerals in the attached drawings: 1. Accessory bolt; 2. Accessory expansion tube; 3. Accessory nut; 31. Hexagonal section; 4. Square part; 41. Deformation section; 42. Threaded section; 43. Section opening; 44. Corner opening; 45. Nut inner opening; 46. Port; 47. Side opening; 48. Limiting plate; 49. Anti-sway section. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] This application discloses a 90° corner lifting screw assembly for iron plates, referring to... Figure 1 The system includes a bolt 1, with a threaded section 42 formed at the tail end of the bolt 1. An expansion tube 2, threadedly connected to the threaded section 42, is inserted into the bolt 1. The expansion tube 2 passes through an opening in the iron plate for hoisting and fastening. A nut 3, capable of rotating within a 0-90° angle range, is connected to the head of the bolt 1. The end of the nut 3, away from the bolt 1, can connect to a screw rod to connect the base material to the screw rod, enabling the base material to be hoisted parallel to the iron plate.

[0036] Referring to the figure, the connection point of the fitting nut 3 to the screw is a hexagonal segment 31. The diameter of the inscribed circle around the hexagonal segment 31 is the same as the diameter of the non-hexagonal segment 31 of the fitting nut 3, so that the hexagonal sleeve can be fitted onto the non-hexagonal segment 31 of the fitting nut 3. The non-hexagonal segment 31 of the fitting nut 3 has a nut inner opening 45 formed inside. The nut inner opening 45 is close to and communicates with the threaded hole of the hexagonal segment 31. The nut inner opening 45 can be hexagonal to fit onto the head of the fitting bolt 1, so that the rotation of the fitting nut 3 can drive the fitting bolt 1 to rotate.

[0037] Referring to the figure, a square piece 4 is formed at one end of the expansion tube 2 near the nut 3. The area of ​​the inscribed circle of the square piece 4 is much larger than the cross-sectional area of ​​the expansion tube 2. The square piece 4 abuts against the iron plate to prevent the expansion tube 2 from completely penetrating the iron plate. A limiting piece 48 is formed on the bolt 1. The surface of the limiting piece 48 facing away from the head of the bolt 1 is abutted against by the square piece 4 to prevent the expansion tube 2 from easily moving after it has moved to a predetermined position relative to the bolt 1. The expansion tube 2 of the accessory is formed with a deformable section 41 located between the square part 4 and the threaded section 42. The deformable section 41 is formed with several segment openings 43 around its own axis. The part of the deformable section 41 between two adjacent segment openings 43 is arc-shaped and bends away from the axis of the deformable section 41, so that after the square part 4 abuts against the limiting piece 48, the accessory bolt 1 continues to rotate, thereby causing the diameter of the deformable section 41 to deform and expand and press tightly against the iron plate, so that the expansion tube 2 of the accessory is fixed in position under the tight pressure of the square part 4 and the deformed deformable section 41.

[0038] Referring to the figure, the inner diameter of one end of the expansion tube 2 with the square part 4 is larger than the outer diameter of the threaded section 42, so that the expansion tube 2 can be smoothly fitted into the bolt 1. The bolt 1 has an anti-sway section 49 formed close to the limiting piece 48. The anti-sway section 49 is located on the side of the limiting piece 48 away from the head of the bolt 1. The outer diameter of the anti-sway section 49 is equal to or slightly smaller than the inner diameter of the end of the expansion tube 2 with the square part 4, so that the end of the expansion tube 2 with the square part 4 is less likely to bend relative to the bolt 1. The anti-sway section 49 can be designed as a thread.

[0039] Referring to the figure, the end face and side of the accessory nut 3 away from the hexagonal segment 31 are formed with a corner opening 44, which allows the accessory bolt 1 to be adjusted from 0 to 90°. The corner opening 44 includes a port 46 located on the end face of the accessory nut 3 and a side opening 47 connected to the port 46. The side opening 47 is located around the periphery and side of the end face of the accessory nut 3. The central angle corresponding to the connection between the port 46 and the side opening 47 is less than 180°. The diameter of the limiting piece 48 is the same as or slightly smaller than the diameter of the port 46 to limit the shaking of the accessory bolt 1, making it less likely for the accessory bolt 1 to bend during the rotation of the accessory nut 3.

[0040] Referring to the figure, the width of the side opening 47 is larger as it gets closer to the port 46. This reduces the wear between the inner wall of the side opening 47 and the bolt 1 when the fitting nut 3 is adjusted relative to the fitting bolt 1. It also allows the fitting nut 3 to be adjusted to 90 degrees more smoothly. When the fitting nut 3 and the fitting bolt 1 are at 90 degrees, the bolt 1 is completely in contact with the inner wall of the side opening 47 away from the port 46. This makes it less likely for the substrate to sway left and right when it is hoisted due to the large width difference between the fitting bolt 1 and the side opening 47.

[0041] The implementation principle of a 90° corner lifting screw assembly for iron plates according to an embodiment of this application is as follows: The expansion tube 2 is fitted onto the bolt 1 and screwed in until the square piece 4 abuts against the limiting piece 48. Then, the expansion tube 2 is inserted into the opening in the iron plate. The nut 3 is then rotated until its axis is the same as the axis of the bolt 1, and the inner opening 45 of the nut is fitted onto the head of the bolt 1. A wrench or similar tool is used to limit the rotation of the square piece 4. A hexagonal socket or similar tool is then fitted onto the nut 3 and rotated, causing the connection between the expansion tube 2 and the threaded section 42 to move towards the deformation section 41. This forces the deformation section to deform with a larger diameter, thus pressing it tightly against the iron plate until the expansion tube 2 and the threaded section 42 separate and are no longer under force. At this point, the lifting screw assembly is fixed to the iron plate.

[0042] Then, rotate the accessory nut 3 so that the accessory nut 3 and the accessory bolt 1 are at a 90° angle, so that the screw can be screwed into the accessory nut 3 corresponding to the accessory. Then, the base material and the screw are connected to realize the hoisting and fixing of the base material.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A 90° corner lifting screw assembly for iron plates, characterized in that: Includes a fitting bolt (1), a fitting expansion tube (2) threaded to the fitting bolt (1) and used for passing through an iron plate, and a fitting nut (3) connected to the head of the fitting bolt (1) and used for threaded connection with a screw rod connected to the substrate to be hoisted. The fitting expansion tube (2) has a square piece (4) formed at one end near the fitting nut (3). The side of the square piece (4) away from the fitting expansion tube (2) is used to abut against the iron plate. The fitting expansion tube (2) has a deformation section (41) and a threaded section (42). The threaded section (42) is threaded to the fitting bolt (1). The threaded section (42) is located on the side of the deformation section (41) away from the square piece (4) so ​​that when the position of the square piece (4) is defined and the threaded section (42) moves toward the square piece (4), the outer diameter of the deformation section (41) expands to cooperate with the square piece (4) to clamp onto the iron plate.

2. The 90° corner lifting screw assembly for iron plates according to claim 1, characterized in that: The deformable segment (41) has several segment openings (43) formed around its own axis. The portion of the deformable segment (41) between two adjacent segment openings (43) is arc-shaped and bends away from the axis of the deformable segment (41).

3. The 90° corner lifting screw assembly for iron plates according to claim 1, characterized in that: The accessory nut (3) has an inner opening (45) inside for the head of the accessory bolt (1) to fit into. The shape of the inner opening (45) corresponds to the shape of the head of the accessory bolt (1) and is polygonal.

4. The 90° corner lifting screw assembly for iron plates according to claim 1, characterized in that: The opening of the accessory nut (3) into which the head of the accessory bolt (1) is inserted is a corner opening (44). The corner opening (44) is formed on the end and side of the accessory nut (3) so that the accessory nut (3) and the accessory bolt (1) can be adjusted within the range of 0-90°.

5. A 90° corner lifting screw assembly for iron plates according to claim 4, characterized in that: The corner opening (44) includes a port (46) located at the end face of the fitting nut (3) and a side opening (47) connected to the port (46). The side opening (47) is located around the end face of the fitting nut (3) and on the side. The central angle corresponding to the connection between the port (46) and the side opening (47) is less than 180°. The fitting bolt (1) is formed with a limiting piece (48). The diameter of the limiting piece (48) is consistent with the diameter of the port (46) to limit the shaking of the fitting bolt (1).

6. A 90° corner lifting screw assembly for iron plates according to any one of claims 3 and 5, characterized in that: The limiting piece (48) is used to abut against the square piece (4). When the limiting piece (48) abuts against the square piece (4), the head of the accessory bolt (1) can enter into the inner opening (45) of the nut.

7. A 90° corner lifting screw assembly for iron plates according to claim 5, characterized in that: The width of the side opening (47) is greater as it gets closer to the port (46), and the body of the fitting bolt (1) can fit against the inner wall of the side opening (47) away from the port (46).

8. A 90° corner lifting screw assembly for iron plates according to claim 1, characterized in that: The inner diameter of the square piece (4) of the accessory expansion tube (2) is larger than the outer diameter of the threaded section (42), and the accessory bolt (1) is formed with an anti-sway section (49) for the accessory expansion tube (2) to be tightly fitted into one end of the square piece (4).

9. A 90° corner lifting screw assembly for iron plates according to claim 3, characterized in that: The diameter of the screw thread connection of the accessory nut (3) is smaller than the diameter of the inscribed circle of the nut's inner opening (45).

10. A 90° corner lifting screw assembly for iron plates according to claim 1, characterized in that: The outer wall of the accessory nut (3) is formed with a hexagonal segment (31) that facilitates rotation by applying force. The diameter of the inscribed circle around the hexagonal segment (31) is equal to the diameter of the part of the accessory nut (3) excluding the hexagonal segment (31).

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