Punching-free expansion bolt

Abstract

The invention discloses a punching-free expansion bolt which comprises an expansion pipe, a screw head is arranged above the expansion pipe, the screw head is connected with the expansion pipe through a connecting mechanism, a coaxial screw rod is fixed to the screw head, two movable positioning pins are installed in an installation groove, and the two positioning pins are connected with the expansion pipe through a connecting mechanism. The screw rod is driven to rotate to drive the screw head and the expansion pipe to rotate, the expansion pipe and the screw head are rotated into the cavity, the elastic gasket abuts against the wall, when the positioning pin on the nut makes contact with the protrusion on the elastic gasket, the positioning pin is squeezed back into the installation groove, meanwhile, when the nut squeezes the elastic gasket, rotating pressure is applied to the expansion pipe, and the expansion pipe is rotated. And the bottom of the expansion pipe is expanded and fastened in the wall body under the rotating pressure. By arranging the expansion bolt capable of being connected with the electric hammer, the whole bolt can be directly driven into the cavity and expanded, the expansion bolt is fastened in the wall, and the defects that in the prior art, after punching, a collision bolt is installed, and a series of operations of fastening the expansion bolt are tedious are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of fasteners, and in particular to a punch-free expansion bolt. Background Art

[0002] Expansion bolts are special threaded connectors used to fix pipe branches, hangers, brackets or equipment to walls, floors or columns.

[0003] It is currently known that the application of expansion bolts has involved high-demand occasions, such as the installation and fixation of large equipment, installation of products in narrow spaces and high-altitude operations. At this time, traditional expansion bolts cannot adapt to such environments, and traditional expansion bolts need to be drilled before installation, the operation process is cumbersome, and the installation work efficiency is low. For this reason, the present application proposes a punch-free expansion bolt. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and to propose a punch-free expansion bolt.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A punch-free expansion bolt comprises an expansion tube, a screw head is provided above the expansion tube, the screw head is connected to the expansion tube through a connecting mechanism, a coaxial screw is fixed on the screw head, an annular groove is provided at the bottom end of the screw, an elastic gasket can be installed in the annular groove, two protrusions are fixedly connected to the elastic gasket, a nut is threadedly connected to the screw, the nut is provided with two symmetrically arranged installation grooves, two movable positioning pins are installed in the installation groove, the screw is driven to rotate to drive the screw head and the expansion tube to rotate, so that the expansion tube and the screw head are transferred into the cavity and the elastic gasket is against the wall, when the positioning pin on the nut contacts the protrusion on the elastic gasket, the positioning pin is squeezed back into the installation groove, and at the same time, when the nut is squeezed onto the elastic gasket, rotational pressure is applied to the expansion tube, and the bottom of the expansion tube is expanded and fastened into the wall due to the rotational pressure.

[0007] Preferably, the connection mechanism comprises a plurality of slots arranged at the end of the expansion tube, a plurality of locking blocks are fixed on the screw head, and when the locking blocks are located in the slots, the expansion tube and the screw head are coaxially mounted together.

[0008] Preferably, the surface of the expansion tube has spiral grooves.

[0009] Preferably, the screw head is arranged in a conical shape, and the end of the expansion tube is arranged to cooperate with the flat end of the screw head.

[0010] Preferably, the positioning pin comprises a slider sliding in the mounting groove, a spring is fixed on the slider, the other end of the spring is arranged in cooperation with the groove, and a latch corresponding to the elastic gasket is fixed on the slider.

[0011] Preferably, the screw rod comprises a round rod, a connecting rod and a bolt, the round rod is fixedly connected to the connecting rod, the round rod is fixedly connected to the screw head, the connecting rod is fixedly connected to the bolt, and the round rod, the connecting rod and the bolt are coaxially arranged.

[0012] Preferably, the diameter of the connecting rod is smaller than the diameters of the bolt and the round rod, and the diameter of the bolt is smaller than the diameter of the round rod.

[0013] Preferably, the nut is threadedly connected to the bolt.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] To sum up, the present invention, by providing an expansion bolt that can be connected to an electric hammer, can directly drive the bolt as a whole into the cavity and expand it, and fasten the expansion bolt in the wall, avoiding the disadvantages of the prior art of installing collision bolts after drilling and tightening the expansion bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a punch-free expansion bolt proposed by the present invention;

[0017] Figure 2 This is a structural schematic diagram of a locking block and a slot in a punch-free expansion bolt proposed by the present invention;

[0018] Figure 3 This is a structural schematic diagram of an annular groove in a punch-free expansion bolt proposed by the present invention;

[0019] Figure 4 This is a schematic structural diagram of an elastic gasket in a punch-free expansion bolt proposed by the present invention;

[0020] Figure 5 The present invention provides a structural schematic diagram of a nut in a punch-free expansion bolt.

[0021] In the figure: 1 expansion tube, 2 screw head, 3 round rod, 4 spiral groove, 5 locking block, 6 slot, 7 bolt, 8 connecting rod, 9 nut, 10 annular groove, 11 elastic gasket, 12 protrusion, 13 bayonet, 14 mounting groove, 15 spring, 16 slider. DETAILED DESCRIPTION

[0022] 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.

[0023] Reference Figure 1-Figure 5 A punch-free expansion bolt comprises an expansion tube 1, a screw head 2 is arranged above the expansion tube 1, the screw head 2 is arranged in a conical shape, the end of the expansion tube 1 is matched with the flat end of the screw head 2, the screw head 2 is connected to the expansion tube 1 through a connecting mechanism, the connecting mechanism comprises a plurality of slots 6 arranged at the end of the expansion tube 1, a plurality of locking blocks 5 are fixed on the screw head 2, when the locking blocks 5 are located in the slots 6, the expansion tube 1 and the screw head 2 are coaxially installed together.

[0024] The surface of the expansion tube 1 is provided with a spiral groove 4 (anti-chip groove), which can discharge powder when the expansion bolt is mounted on the wall.

[0025] A coaxial screw rod is fixed on the screw head 2, and the screw rod includes a round rod 3, a connecting rod 8 and a bolt 7. The round rod 3 is fixedly connected to the connecting rod 8, the round rod 3 is fixedly connected to the screw head 2, the connecting rod 8 is fixedly connected to the bolt 7, the round rod 3, the connecting rod 8 and the bolt 7 are coaxially arranged, the diameter of the connecting rod 8 is smaller than the diameter of the bolt 7 and the round rod 3, the diameter of the bolt 7 is smaller than the diameter of the round rod 3, and the nut 9 is threadedly connected to the bolt 7.

[0026] An annular groove 10 is provided at the bottom end of the screw, and an elastic gasket 11 can be installed in the annular groove 10. Two protrusions 12 are fixedly connected to the elastic gasket 11. A nut 9 is threadedly connected to the screw, and two symmetrically arranged mounting grooves 14 are provided on the nut 9. Two movable positioning pins are installed in the mounting groove 14. The positioning pins include a slider 16 that slides in the mounting groove 14. A spring 15 is fixed on the slider 16. The other end of the spring 15 is matched with the mounting groove 14. A latch 13 opposite to the elastic gasket 11 is fixed on the slider 16.

[0027] In this technology, an extended drill bit is welded at the bottom of the bolt 7, which can be installed on an electric hammer. The electric hammer can directly drill holes and install in one step. The electric hammer rotates and drives the screw rod, the bolt 2 rotates and drives the expansion tube 1 to rotate, and the screw rod is installed on the wall.

[0028] The screw is driven to rotate, driving the screw head 2 and the expansion tube 1 to rotate, so that the expansion tube 1 and the screw head 2 are transferred into the cavity and the elastic gasket 11 is against the wall. At this time, the elastic gasket 11 contacts the locating pin on the nut 9. When the locating pin on the nut 9 contacts the protrusion 12 on the elastic gasket 11 (the elastic gasket 11 has a uniform thickness everywhere, which can ensure uniform contact with the nut), the locating pin is squeezed back into the installation groove 14 on the nut 9. The card groove 6 on the expansion tube 1 is fastened together with the locking block 5 on the screw head 2. Since the elastic gasket 11 is against the wall and the nut 9 is against the elastic gasket 11, the elastic gasket 11 and the nut 9 no longer rotate at this time. When the electric hammer drives the screw to rotate, the bolt 7 and the nut 9 rotate relative to each other. In this way, the nut 9 cooperates with the screw head 2 to apply rotational pressure to the expansion tube 1. Under the rotational pressure, the bottom of the expansion tube 1 expands and is fastened into the wall.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A punch-free expansion bolt, comprising an expansion tube (1), characterized in that: A screw head (2) is provided above the expansion tube (1), and the screw head (2) is connected to the expansion tube (1) through a connecting mechanism. A coaxial screw rod is fixed on the screw head (2), and an annular groove (10) is provided at the bottom end of the screw rod. An elastic gasket (11) can be installed in the annular groove (10), and two protrusions (12) are fixedly connected to the elastic gasket (11). A nut (9) is threadedly connected to the screw rod, and the nut (9) is provided with two symmetrically arranged installation grooves (14), and the installation grooves (14) Two movable positioning pins are installed inside, and the screw rod is driven to rotate to drive the screw head (2) and the expansion tube (1) to rotate, so that the expansion tube (1) and the screw head (2) are rotated into the cavity and the elastic gasket (11) is pressed against the wall. When the positioning pin on the nut (9) contacts the protrusion (12) on the elastic gasket (11), the positioning pin is squeezed back into the installation groove (14). At the same time, when the nut (9) is squeezed onto the elastic gasket (11), a rotational pressure is applied to the expansion tube (1). Under the rotational pressure, the bottom of the expansion tube (1) is expanded and fastened into the wall.

2. The punch-free expansion bolt according to claim 1, characterized in that: The connection mechanism comprises a plurality of slots (6) arranged at the end of the expansion tube (1); a plurality of locking blocks (5) are fixed on the screw head (2); when the locking blocks (5) are located in the slots (6), the expansion tube (1) and the screw head (2) are coaxially mounted together.

3. The punch-free expansion bolt according to claim 1, characterized in that: The surface of the expansion tube (1) is provided with a spiral groove (4).

4. The punch-free expansion bolt according to claim 1, characterized in that: The screw head (2) is arranged in a conical shape, and the end of the expansion tube (1) is arranged to cooperate with the plane end of the screw head (2).

5. The punch-free expansion bolt according to claim 1, characterized in that: The positioning pin comprises a slider (16) sliding in the mounting groove (14), a spring (15) being fixed on the slider (16), the other end of the spring (15) being arranged in cooperation with the groove (14), and a latch (13) being fixed on the slider (16) and being opposite to the elastic gasket (11).

6. The punch-free expansion bolt according to claim 1, characterized in that: The screw rod comprises a round rod (3), a connecting rod (8) and a bolt (7); the round rod (3) is fixedly connected to the connecting rod (8); the round rod (3) is fixedly connected to the screw head (2); the connecting rod (8) is fixedly connected to the bolt (7); and the round rod (3), the connecting rod (8) and the bolt (7) are coaxially arranged.

7. The punch-free expansion bolt according to claim 6, characterized in that: The diameter of the connecting rod (8) is smaller than the diameters of the bolt (7) and the round rod (3), and the diameter of the bolt (7) is smaller than the diameter of the round rod (3).

8. The punch-free expansion bolt according to claim 7, characterized in that: The nut (9) is threadedly connected to the bolt (7).

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