Fabricated unilateral bolt

Abstract

The utility model relates to an assembly type single-side bolt which effectively solves the problems that a single-side bolt cannot be detached and is uneven in stress and large in hole opening difficulty. According to the technical scheme, the device comprises a screw rod, a nut and a clamping sleeve, the clamping sleeve is in a hollow cylinder shape, the screw rod can penetrate through the clamping sleeve, limiting protruding edges extending outwards are arranged at the two ends of the clamping sleeve, the clamping sleeve is of a split type and is divided into six unit blocks through three dividing faces parallel to the axis of the clamping sleeve, the first dividing face coincides with one diameter of the clamping sleeve, and the second dividing face coincides with the other diameter of the clamping sleeve. The second cutting surface and the third cutting surface are perpendicular to the first cutting surface, the second cutting surface and the third cutting surface are symmetrical about the axis of the jacket, two unit blocks between the second cutting surface and the third cutting surface are first unit blocks, and the other four unit blocks are second unit blocks; according to the utility model, the structure is uniformly stressed and can be disassembled and reused, and only conventional round holes are required to be formed instead of long round holes, so that the hole forming is simple.

Description

Technical Field

[0001] The utility model relates to the field of connecting pieces, in particular to an assembled single-sided bolt. Background Art

[0002] In bolted connections between steel pipes and steel plates, workers cannot insert their hands into the steel pipe to install the bolts due to the closed cross-section of the steel pipe. They can only operate from the outside of the bolt hole. Various single-sided bolt solutions have been proposed in the prior art:

[0003] The invention patent application number CN201210435247.7 discloses a single-sided fastening bolt. This patent adopts a sleeve slit method, and achieves position limiting by expanding and deforming the sleeve during the tightening process. However, its disadvantage is that it cannot be disassembled and cannot be recycled.

[0004] The invention patent application number CN201810818511.2 discloses a unilateral bolt fastener. The patent adopts a sliding block method. During the tightening process, the block is limited by sliding outward. The block is straight, resulting in uneven force on the connection part.

[0005] The invention patent with application number: CN201911184584.1 discloses a T-shaped single-sided bolt fastener. The patent provides an oblong bolt tail and opens an oblong bolt hole. The bolt tail and the bolt hole are misaligned to achieve positioning by rotating the bolt around the axis. The patent uses an oblong bolt hole, which leads to uneven force on the connection part. Moreover, the difficulty and convenience of opening the oblong hole are much lower than the convenience of opening the round hole. Summary of the Invention

[0006] The utility model provides an assembled single-side bolt, which aims to solve the problems that the single-side bolt cannot be disassembled, is subjected to uneven force, and is difficult to drill a hole.

[0007] The technical solution includes a screw, a nut and a jacket. The jacket is a hollow cylindrical shape, the screw can pass through the jacket, and both ends of the jacket are provided with outward extending limit convex edges. The jacket is split and is divided into six unit blocks by three cutting surfaces parallel to the jacket axis. The first cutting surface coincides with one of the diameters of the jacket, the second cutting surface and the third cutting surface are perpendicular to the first cutting surface, and the second cutting surface and the third cutting surface are symmetrical about the jacket axis. The two unit blocks between the second cutting surface and the third cutting surface are the first unit blocks, and the remaining four unit blocks are the second unit blocks.

[0008] The tail of the screw is circular.

[0009] The head of the screw is provided with an external hexagonal socket.

[0010] A rope threading ring is fixed on the head of the screw rod.

[0011] The diameter of the limiting convex edge at the upper end of the sleeve is larger than the diameter of the limiting convex edge at the lower end, and after the sleeve is cut, the maximum length of the upper end of each unit block is larger than the diameter of the circular hole processed on the workpiece, and the maximum length of the lower end is smaller than the diameter of the circular hole processed on the workpiece.

[0012] The diameter of the limiting convex edge at the upper end of the jacket is larger than the diameter of the nut.

[0013] The structure of the utility model is evenly stressed and can be disassembled and reused. Moreover, no oblong holes need to be opened, only conventional round holes need to be opened, and the hole opening is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front sectional view of the utility model after installation.

[0015] Figure 2 It is a three-dimensional diagram of the screw of the utility model.

[0016] Figure 3 It is a three-dimensional diagram of the nut of the utility model.

[0017] Figure 4 This is a split diagram of the jacket of the utility model.

[0018] Figure 5 This is an assembly diagram of the jacket of the present utility model.

[0019] Figure 6 It is a top view of the jacket of the present invention.

[0020] Figure 7 This is a top view schematic diagram of the jacket's conventional split method where the last unit block cannot be put into place.

[0021] Figure 8 This is a top view of the split jacket of the present invention when it is assembled.

[0022] Figure 9 This is an installation process diagram of the present utility model. DETAILED DESCRIPTION

[0023] In conjunction with the accompanying drawings, the utility model includes a screw 1, a nut 2 and a jacket 3. The jacket 3 is hollow cylindrical, the screw 1 can pass through the jacket 3, and both ends of the jacket 3 are provided with outward extending limit ridges 4. The jacket 3 is split and is divided into six unit blocks by three cutting surfaces parallel to the axis of the jacket 3. The first cutting surface 5 coincides with one of the diameters of the jacket 3, the second cutting surface 6 and the third cutting surface 7 are perpendicular to the first cutting surface 5, and the second cutting surface 6 and the third cutting surface 7 are symmetrical about the axis of the jacket 3. The two unit blocks between the second cutting surface 6 and the third cutting surface 7 are the first unit blocks 8, and the remaining four unit blocks are the second unit blocks 9; the six unit blocks cut in this way can be assembled into a complete jacket 3 in the circular hole, so that the jacket 3 with limit ridges 4 on the upper and lower sides can be installed in the circular hole.

[0024] The tail of the screw 1 is circular and can pass through the circular hole on the part to be connected.

[0025] The head of the screw rod 1 is provided with an external hexagonal corner 10 , and the screw rod 1 can be fixed by the external hexagonal corner 10 when the nut is tightened.

[0026] The head of the screw rod 1 is fixed with a rope ring 11 for threading a wire and hanging the screw rod 1 through a circular hole on the workpiece into the closed workpiece.

[0027] The diameter of the limiting ridge 4 at the upper end of the sleeve 3 is larger than the diameter of the limiting ridge 4 at the lower end, and after the sleeve 3 is cut, the maximum length of the upper end of each unit block is larger than the diameter of the circular hole processed on the workpiece, and the maximum length of the lower end is smaller than the diameter of the circular hole processed on the workpiece, so that the lower end of each unit can be inserted into the circular hole and the unit block can be prevented from falling into the workpiece.

[0028] The diameter of the limiting protrusion 4 at the upper end of the jacket 3 is larger than the diameter of the nut 2 to ensure uniform load bearing.

[0029] The following is an example of installation on a steel pipe to introduce the use process of this utility model:

[0030] First, insert the rope through the rope ring 11 on the top of the bolt, and hang the screw 1 into the steel pipe through the round hole drilled on the steel pipe. Then, pass the lower ends of the four second unit blocks 9 through the round holes on the steel pipe and assemble them in their respective positions in the round holes. Then, pass the lower ends of the two first unit blocks 8 through the round holes and insert them between the second unit blocks 9. Then, assemble the jacket 3 into shape in the round hole. This splitting method can assemble the jacket 3 into shape in the round hole, while the traditional splitting method, such as Figure 7 As shown, the last unit block cannot be placed.

[0031] After the jacket 3 is assembled, the head of the screw 1 is pulled out of the hole of the jacket 3 by the lifting rope, and the nut 2 is screwed on the head of the screw 1. The outer hexagon 10 of the head of the screw 1 is fixed with a wrench and the nut 2 is tightened to complete the installation of the single-sided bolt.

[0032] The utility model adopts the unique splitting mode of the jacket 3, so that the jacket 3 can be assembled and formed in the circular hole space, forming a structure with limiting convex edges 4 at both ends, which is clamped in the circular hole, reducing the hole diameter and making it impossible to pull out the tail end of the screw 1; this structure is evenly stressed and can be disassembled and reused, and does not require opening an oblong hole, only a conventional circular hole, which makes the hole opening simple.

Claims

1. An assembled single-sided bolt, comprising a screw rod (1), a nut (2) and a jacket (3), characterized in that: The jacket (3) is in the shape of a hollow cylinder, the screw (1) can pass through the jacket (3), and both ends of the jacket (3) are provided with outwardly extending limiting convex edges (4). The jacket (3) is split and is divided into six unit blocks by three cutting surfaces parallel to the axis of the jacket (3). The first cutting surface (5) coincides with one diameter of the jacket (3), the second cutting surface (6) and the third cutting surface (7) are perpendicular to the first cutting surface (5), and the second cutting surface (6) and the third cutting surface (7) are symmetrical about the axis of the jacket (3). The two unit blocks between the second cutting surface (6) and the third cutting surface (7) are the first unit blocks (8), and the remaining four unit blocks are the second unit blocks (9).

2. The assembled single-sided bolt according to claim 1, characterized in that: The tail of the screw (1) is circular.

3. The assembled single-sided bolt according to claim 1, characterized in that: The head of the screw (1) is provided with an external hexagonal corner (10).

4. The assembled single-sided bolt according to claim 1 or 3, characterized in that: A rope threading ring (11) is fixed to the head of the screw rod (1).

5. The assembled single-sided bolt according to claim 1, characterized in that: The diameter of the limiting convex edge (4) at the upper end of the jacket (3) is larger than the diameter of the limiting convex edge (4) at the lower end, and after the jacket (3) is cut, the maximum length of the upper end of each unit block is larger than the diameter of the circular hole machined on the workpiece, and the maximum length of the lower end is smaller than the diameter of the circular hole machined on the workpiece.

6. The assembled single-sided bolt according to claim 1, characterized in that: The diameter of the limiting ridge (4) at the upper end of the jacket (3) is larger than the diameter of the nut (2).

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