A unilateral bolt fastening device with an openable and self-resetting gasket

Abstract

The present invention discloses a one-sided bolt fastening device with an openable and self-resetting gasket, which comprises a screw rod, a nut, a gasket, a nut and an openable and self-resetting gasket. The openable and self-resetting gasket includes a plurality of arc gaskets with an L-shaped cross-section. A rubber arc ring is connected to the bottom of each arc gasket. A through hole is provided in the rubber arc ring, and an elastic ring strip and a plurality of traction lines are arranged in the through hole. The plurality of arc gaskets are gathered and closed by the ring strip to form a ring, and a ring step surface is provided inside the ring. The arc gasket is folded and inserted into the installation hole, and the arc gasket returns to its original state under the elastic action; then the nut is inserted into the installation hole and the traction line is pulled to prevent the gasket from falling off. The nut abuts against the arc step surface and triggers the ring strip to drive the arc gasket to rotate and open so that the nut can pass through; after the nut completely enters, the arc gasket returns to its original state under the elastic action, and the nut is clamped to achieve one-sided anchoring, and the installation is convenient.

Description

Technical Field

[0001] The present invention relates to the field of fastening bolts, and particularly to a unilateral bolt fastening device with an openable and self-resetting gasket. Background Art

[0002] Bolts are known as the "rice of industry" and are essential in daily life and industrial manufacturing. For currently commonly used bolts, when connecting and fastening components, workers need to operate on both sides of the component. That is, insert a bolt with a nut on one side, and then use tools to tighten the nut on the other side. This connection and fastening method has a simple structure, convenient operation, and good load-bearing capacity, but it is only applicable to components with an open cross-section. In some special occasions, such as at the beam-column connection nodes in steel pipe structures and concrete-filled steel tube structures, since the steel pipe column has a closed cross-section and operations cannot be carried out on both sides, only unilateral connection and installation can be performed, so the commonly used bolt and nut connection and fastening method cannot be used for fastening installation. Summary of the Invention

[0003] In order to solve the problem that it is difficult to achieve simple and fast fastening when using existing bolts for reinforcement of closed cross-sections, the present invention provides a unilateral bolt fastening device with an openable and self-resetting gasket.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows: A unilateral bolt fastening device with an openable and self-resetting gasket, comprising a screw rod, a nut, a gasket, and a nut. The nut is cylindrical or spherical-crowned, and the nut is fixedly connected to one end of the screw rod. The other end of the screw rod passes through the gasket and is threadedly connected to the nut.

[0005] The unilateral bolt fastening device further includes an openable and self-resetting gasket. The openable and self-resetting gasket includes a plurality of arc gaskets. The cross-section of the arc gasket is L-shaped. A rubber arc ring is connected to the bottom of each arc gasket. A through hole penetrating the ring body of the rubber arc ring is provided inside the rubber arc ring. The same elastic ring-shaped strip is commonly inserted into a plurality of the through holes. A plurality of arc gaskets are gathered and closed by the ring-shaped strip to form a ring. A ring step surface is provided inside the ring. The inner diameter of the ring step surface is adapted to the outer diameter of the screw rod, and the outer diameter of the ring step surface is adapted to the outer diameter of the nut. A traction line is respectively inserted into each through hole, that is, both ends of the traction line respectively extend out of the through hole.

[0006] The openable and self-resetting gasket is sleeved on the screw rod, and the nut is embedded on the ring step surface.

[0007] Preferably, the number of the arc gaskets is an even number not less than 2.

[0008] More preferably, the number of the arc gaskets is four.

[0009] Preferably, the material of the elastic annular strip is rubber.

[0010] Preferably, the curvature of the rubber arc ring is the same as that of the arc gasket.

[0011] The present invention only needs to install bolts on one side, realizing single-sided fastening. When bolt connection of a closed section is required, by folding the arc gasket, after the arc gasket passes through the installation hole, it is placed into the closed section. Multiple arc gaskets will return to the circular ring shape under the action of the elastic potential energy of the annular strip. By pulling the traction line, the arc gasket is fixed. When the upper end of the nut is moved from the installation hole into the closed section, the nut enters the installation hole by the rotation of the arc gasket. Then, the arc gasket restores its shape under the action of the elastic potential energy of the annular strip, and a circular gasket is formed again in the installation hole. The nut enters the circular ring step surface of the arc gasket downward to form a normal bolt, and then fastening is achieved through the nut and the gasket, realizing bolt connection for a closed section that cannot be accessed.

[0012] The present invention realizes simple and fast single-sided bolt installation for a closed section, has good mechanical properties, and can be widely applied to civil engineering and mechanical engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a schematic structural diagram of a single-sided bolt fastening device with an openable and self-resetting gasket proposed by the present invention;

[0014] Figure 2 is Figure 1 an enlarged structural view of part A in

[0015] Figure 3 FIG. is a top view structural diagram of a single-sided bolt with an openable and self-resetting gasket proposed by the present invention;

[0016] Figure 4 FIG. is a bottom view cross-sectional structural diagram of a single-sided bolt with an openable and self-resetting gasket proposed by the present invention;

[0017] Figure 5 is a folding state diagram of the arc gasket before entering the installation hole;

[0018] Figure 6 is a schematic diagram of the arc gasket restoring to the circular ring shape under the action of elastic potential energy after entering the installation hole;

[0019] Figure 7 is a schematic diagram of the installation where the nut and the screw enter the installation hole and the nut pushes open the arc gasket;

[0020] Figure 8 is Figure 7 a top view schematic diagram of the nut pushing open the arc gasket in

[0021] Figure 9 This is a schematic diagram of the bolt installation completion;

[0022] In the figure: 1 screw rod, 2 nut, 3 arc gasket, 4 circular ring step surface, 5 rubber arc ring, 61 through hole, 62 annular strip, 7 traction line, 8 gasket, 9 nut, 10 closed section, 11 mounting hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figure 1 , Figure 9 As shown, a single-sided bolt fastening device with an openable and self-resetting gasket of the present invention comprises a screw rod 1, a nut 2, a gasket 8 and a nut 9, wherein the nut 2 is cylindrical or spherical, and the nut 2 is fixedly connected to one end of the screw rod 1, and the other end of the screw rod 1 passes through the gasket 8 and is threadedly connected to the nut 9.

[0026] like Figures 1 to 4 As shown, the unilateral bolt fastening device also includes a self-resetting gasket that can be opened and closed, and the self-resetting gasket that can be opened and closed includes a plurality of arc gaskets 3. The cross-section of the arc gasket 3 is L-shaped, and the number of the arc gaskets 3 is an even number not less than 2. In this embodiment, there are four arc gaskets 3 in total, and a rubber arc ring 5 is connected to the bottom of each arc gasket 3. The curvature of the rubber arc ring 5 is the same as the curvature of the arc gasket 3. The rubber arc ring 5 and the arc gasket 3 can be connected by gluing, or an arc structure ring groove can be opened at the bottom of the arc gasket 3, and the rubber arc ring 5 can be just embedded in the ring groove. The rubber arc ring 5 is provided with a through hole 61 penetrating the ring body of the rubber arc ring 5, and the four through holes 61 are provided with a common elastic annular strip 62, and the material of the annular strip 62 can be rubber, which has good elasticity. The four arc gaskets 3 are gathered and closed by the annular strip 62 to form a circular ring. Since the annular strip 62 has a certain elasticity, the circular ring can be folded and opened (such as Figure 5 , Figure 6As shown in the figure. Inside the circular ring, there is a circular ring stepped surface 4. The inner diameter of the circular ring stepped surface 4 is adapted to the outer diameter of the screw 1, and the outer diameter of the circular ring stepped surface 4 is adapted to the outer diameter of the nut 2. A traction wire 7 is respectively passed through each through hole 61, that is, both ends of the traction wire 7 extend out of the through hole 61. The traction wire 7 can bear a certain tensile force. During the process of the nut 2 extending into the installation hole 10, the arc-shaped gasket 3 can be prevented from falling off by pulling the traction wire 7.

[0027] The openable and self-resetting gasket is sleeved on the screw 1. The nut 2 is embedded in the openable and self-resetting gasket and is in contact connection with the circular ring stepped surface 4.

[0028] When tightening the bolt for the closed section 10, first drill a hole on the closed section 10 to be tightened. The diameter of the drilled installation hole 11 is slightly larger than the diameter of the nut 2. Fold the arc-shaped gasket 3 and pass it through the installation hole 11 and place it inside the closed section 11 (as Figure 5 shown). The arc-shaped gasket 3 located inside the closed section 11 resumes into a circular ring shape under the elastic force of the annular strip 62. At this time, by tightening the traction wire 7 in the through hole 61 on the rubber arc ring 5, the arc-shaped gasket 3 is stabilized around the installation hole 11, and the rubber arc ring 5 fits with the closed section 10 (as Figure 6 shown);

[0029] Insert the upper end of the nut 2 on the screw 1 into the installation hole 11. The nut 2 abuts against the arc-shaped gasket 3, and the arc-shaped gasket 3 will rotate upward due to the abutment of the nut 2, that is, the arc-shaped gasket 3 will expand and rotate (as Figure 7 、 Figure 8 shown). Until the nut 2 completely enters the closed section 10, the arc-shaped gasket 3 will resume into a circular ring shape under the elastic force of the annular strip 62. Pull the screw 1 to install the nut 2 on the circular ring stepped surface 4 of the arc-shaped gasket 3 and abut against each other to make it a normal fastening component, and then fix it with a gasket 8 and a nut 9 from the outside of the closed section 10 (as Figure 9 shown).

[0030] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A single-sided bolt fastening device with an openable and self-resetting gasket, comprising a screw rod (1), a nut (2), a gasket (8) and a nut (9), wherein the nut (2) is cylindrical or spherical, the nut (2) is fixedly connected to one end of the screw rod (1), and the other end of the screw rod (1) passes through the gasket (8) and is threadedly connected to the nut (9), characterized in that: The single-sided bolt fastening device also includes an openable and closable self-resetting gasket, which includes a plurality of circular arc gaskets (3), the cross section of the circular arc gasket (3) is L-shaped, and the bottom of each circular arc gasket (3) is connected to a rubber circular arc ring (5), and a through hole (61) penetrating the ring body of the rubber circular arc ring (5) is provided in the rubber circular arc ring (5), and a plurality of the through holes (61) are provided with a common elastic annular strip (62), and the plurality of circular arc gaskets (3) are gathered and closed by the annular strip (62) to form a circular ring, and the circular ring has a circular step surface (4), the inner diameter of the circular step surface (4) is adapted to the outer diameter of the screw rod (1), and the outer diameter of the circular step surface (4) is adapted to the outer diameter of the nut (2), and each of the through holes (61) is also provided with a traction line (7), that is, the two ends of the traction line (7) extend out of the through hole (61), The openable and self-resetting gasket is sleeved on the screw rod (1), and the nut (2) is embedded in the openable and self-resetting gasket and is in contact with the annular step surface (4); The circular ring can be folded or opened under the action of elasticity.

2. The one-sided bolt fastening device with an openable and self-resetting gasket according to claim 1, wherein The number of the arc gaskets is an even number not less than 2.

3. The one-sided bolt fastening device with an openable and self-resetting gasket according to claim 2, wherein There are four circular arc gaskets (3) in total.

4. The one-sided bolt fastening device with an openable and self-resetting gasket according to claim 1, characterized in that, The elastic annular strip (62) is made of rubber.

5. The one-sided bolt fastening device with an openable and self-resetting gasket according to claim 1, characterized in that, The curvature of the rubber circular arc ring (5) is the same as the curvature of the circular arc gasket (3).

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