CN115013398A

CN115013398A - Expansion bolt assembly

Info

Publication number: CN115013398A
Application number: CN202210756978.5A
Authority: CN
Inventors: 谭建平
Original assignee: Foshan Haoyu Home Furnishing Technology Co ltd
Current assignee: Foshan Haoyu Home Furnishing Technology Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-09-06
Anticipated expiration: 2042-06-30
Also published as: CN115013398B

Abstract

The invention discloses an expansion bolt assembly; comprises an expansion pipe, a magnetic part, a first screw and a second screw; the first screw rod is located inside the expansion pipe, a first threaded hole matched with the second screw rod is formed in the lower end of the first screw rod, and the magnetic part is connected to the lower end of the second screw rod. The detachable connecting piece is added, the disassembling difficulty is reduced, the construction amount is reduced, and the construction efficiency is improved.

Description

Expansion bolt assembly

Technical Field

The invention relates to the technical field of decoration and installation, in particular to an expansion bolt assembly.

Background

The conventional expansion bolt comprises a bolt and an expansion pipe, when the expansion bolt is used, a hole with a corresponding size needs to be drilled on a fixed body by using an impact electric drill (hammer), then the bolt and the expansion pipe are arranged in the hole, and the bolt, the expansion pipe, an installation part and the fixed body can be expanded into a whole by screwing a nut. The fixing principle of the expansion bolt is as follows: the tail part of the bolt is provided with a big end, the outer surface of the bolt is sleeved with a round pipe (expansion pipe) which is slightly larger than the diameter of the bolt, and the tail part of the expansion pipe is provided with a plurality of openings. When the bolt is tightened, the tail part of the big end is taken into the pipe with the opening, the pipe is extruded to be enlarged, the purpose of expansion is achieved, and the bolt is further fixed on the ground or the wall.

The expansion bolts described above have some disadvantages: because the in-process bolt that the nut was screwed up is stretched out outward, bolt and nut all can protrusion in the wall promptly, to the construction that some installation accuracy required height, the size requirement that the convex bolt can not be installed increases the degree of difficulty for the construction. In addition, the bolt is not provided with a connecting piece, and the connecting piece needs to be additionally equipped, the connecting piece generally adopts a washer with a fixed rod to be sleeved on the bolt, and finally, the tail end of the bolt is screwed with another nut, so that the washer is clamped. Although the connecting piece is firmly connected, the disassembling process is troublesome, and the nut at the tail end needs to be removed first to remove the gasket. In some ceiling construction processes, the connecting pieces may need to be repeatedly disassembled and assembled for many times, the construction difficulty of the conventional connecting pieces is increased due to the difficulty in disassembly, meanwhile, the construction amount is greatly increased, and the construction progress is easily delayed.

Disclosure of Invention

Aiming at the defects in the prior art, the detachable connecting piece is added, the dismounting difficulty is reduced, and the construction amount is reduced. The invention provides an expansion bolt assembly; comprises an expansion pipe, a magnetic part, a first screw and a second screw; the first screw rod is located inside the expansion pipe, a first threaded hole matched with the second screw rod is formed in the lower end of the first screw rod, and the magnetic part is connected to the lower end of the second screw rod.

The beneficial effects of this equipment are embodied in: but the magnetism part passes through magnetism split connection with the object that needs to be fixed, for example the ornament of furred ceiling usefulness sets up another magnetic part on the ornament, and two magnetic parts pass through magnetic force and adsorb fixedly, need when tearing open with the offset plate with both separately can, the dismouting is very convenient, is favorable to improving the efficiency of construction.

Preferably, the magnetic part is provided with a first through hole with a diameter smaller than that of a nut of the second screw rod, the second screw rod is sleeved with two nuts, one of the nuts is screwed on the lower end of the first screw rod, and the other nut is pressed against the upper end of the magnetic part. And screwing the second screw rod into the first threaded hole, and screwing the two nuts so as to fix the magnetic piece.

Preferably, the expansion pipe comprises a fixed section and an expansion section which are fixedly connected;

the expansion section is internally provided with an expansion hole extending along the central shaft, the expansion section is provided with a plurality of gaps extending along the radial direction, all the gaps penetrate through the upper end of the expansion section and are communicated with the expansion hole, and therefore the side wall of the expansion section forms a plurality of movable pieces;

a second through hole along the axial direction is formed in the fixing section, penetrates through the upper end and the lower end of the fixing section and is communicated with the expansion hole;

the outer surface of the first screw rod is smooth, and the first screw rod is rotationally connected in the second through hole; the upper end of the first screw rod is provided with a second threaded hole along the axial direction, a screw rod is arranged in the second threaded hole, and the upper end of the screw rod is provided with a tip cone; the first screw rod is rotated to further enable the tip cone to move upwards so as to extrude all the movable sheets to be unfolded all around.

The first screw rod rotates in the second through hole, and meanwhile, the screw rod is pushed to move upwards until the tip cone extrudes all the movable pieces and all the movable pieces are unfolded all around, so that the movable pieces are clamped in the drilled hole. Because the first screw rod only rotates but does not axially displace, the first screw rod does not protrude out of the wall surface, and the accurate installation is favorably realized.

Preferably, the outer surfaces of all the movable plates are provided with anti-skid grains; and the upper surface of the tip cone is fully distributed with anti-skid protrusions. The anti-skidding line increase movable plate of movable plate and the friction between the hole, fixed more temperature, and the anti-skidding arch can prevent that the tip cone from taking place to rotate on the tip cone.

Preferably, the upper end of the second through hole is provided with a first counter bore, the tip cone is positioned in the first counter bore, and the first counter bore and the expansion hole are filled with a locking agent. The anti-loosening agent is made of granular materials, and the tip cone can be further prevented from rotating after the anti-loosening agent is filled.

Preferably, the lower end of the second through hole is provided with a second counter bore, the lower end of the first screw is provided with a hexagonal prism, and the hexagonal prism and the magnetic part are both located in the second counter bore. The hexagonal prism can be adapted to the sleeve tool, by which it is easier to turn the first screw.

Preferably, the axial sectional shape of the expansion hole is triangular. The diameter of the triangular expansion hole is smaller as the expansion hole goes upwards, and the tip cone is continuously pushed into the expansion hole, so that the expansion amplitude of the movable sheet is larger, and the fixing effect is improved.

Preferably, the number of the movable plates is not less than four.

Preferably, the cross section of the tip cone is in an isosceles trapezoid shape, and the tip cone is fixedly connected with the screw rod through a cylinder. The tip cone plays a role of a pilot, and the cylinder plays a main role of extruding the movable sheet.

Preferably, the expansion section is gradually increased in diameter from top to bottom. The cross section of the expansion section is bullet-shaped, the expansion section can be easily inserted into a drilled hole, and the expansion pipe can be knocked in more labor-saving.

The invention also provides an installation method of the expansion bolt, which is applied to the expansion bolt assembly and comprises the following steps:

s1, drilling a hole in the wall surface, wherein the diameter of the hole is equal to that of the fixing section;

s2, inserting the expansion section into the wall hole, knocking the tail end of the fixed section to enable the whole fixed section to be completely inserted, and enabling the tail end of the fixed section to be flush with the wall;

s3, rotating the hexagonal prism, pushing the tip cone to move towards the wall surface hole by the screw rod, continuously pushing the tip cone into the expansion hole with the triangular cross section, and increasing the expansion amplitude of the movable sheet until the hexagonal prism cannot rotate;

s4, screwing a nut on the second screw rod downwards to fix the magnetic piece;

s5, rotating the other nut upwards for a set distance to enable the lower end of the magnetic part to be flush with the lower end of the fixed section after the second screw rod is screwed in the first threaded hole, and completing installation.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram according to a first embodiment;

FIG. 2 is a schematic structural diagram of the second embodiment;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a bottom view of FIG. 2;

FIG. 5 is a schematic structural view of the magnetic member and the second screw rod hidden in FIG. 4;

FIG. 6 is a schematic view of the internal structure of FIG. 2;

fig. 7 is a schematic structural view of fig. 6 after the locking agent is hidden.

In the attached drawing, the expansion pipe 1, the magnetic part 2, the first screw rod 3, the second screw rod 4, the first threaded hole 5, the first through hole 6, the nut 7, the fixed section 8, the expansion section 9, the gap 10, the expansion hole 11, the second through hole 12, the limiting ring 13, the screw rod 14, the tip cone 15, the first counter bore 16, the anti-loosening agent 17, the second counter bore 18, the anti-skid protrusion 19, the second threaded hole 20, the movable sheet 21 and the hexagonal prism 22 are arranged.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

The first embodiment is as follows:

as shown in fig. 1, the first embodiment provides an expansion bolt assembly, which comprises an expansion pipe 1, a magnetic member 2, a first screw rod 3 and a second screw rod 4. The first screw rod 3 is positioned in the expansion pipe 1, a first threaded hole 5 matched with the second screw rod 4 is formed in the lower end of the first screw rod 3, and the magnetic part 2 is connected to the lower end of the second screw rod 4.

Further, the magnetic part 2 is provided with a first through hole 6 with a diameter smaller than that of the nut of the second screw rod 4, the second screw rod 4 is sleeved with two nuts 7, one of the nuts 7 is screwed on the lower end of the first screw rod 3, and the other nut 7 is pressed on the upper end of the magnetic part 2. When the expansion pipe is used, the second screw rod 4 is screwed into the first threaded hole 5, the two nuts 7 are screwed, the magnetic piece 2 is fixed, and finally the expansion pipe 1 is knocked into a drilled hole.

The magnetism part 2 in this embodiment is the strong magnet, sets up another strong magnet on ornament or other connecting pieces that the furred ceiling was used, and two strong magnets pass through magnetic force and adsorb fixedly, need when tearing open with the offset plate with both separately can to realized the detachable connection of ornament or connecting piece, the dismouting is very convenient, is favorable to improving the efficiency of construction.

Example two:

the second embodiment provides another expansion bolt assembly, which has most of the same structure as the first embodiment except that the outer portion of the first threaded rod 3 is smooth and the upper end of the first threaded rod 3 is provided with a second threaded hole 20 along the axial direction.

The reference numerals of the second embodiment are the same as those of the first embodiment. As shown in fig. 2, 3 and 7, the expansion tube 1 in this embodiment comprises a fixed section 8 and an expansion section 9 which are fixedly connected. The expansion section 9 is provided internally with expansion holes 11 extending along the central axis, and the expansion section 9 is provided with six slits 10 extending in radial direction. All the gaps 10 penetrate through the upper end of the expansion section 9, all the gaps 10 are communicated with the expansion holes 11, and therefore six movable pieces 21 are formed on the side wall of the expansion section 9. In addition, the axial sectional shape of the expansion hole 11 is triangular. The diameter of the triangular expansion holes 11, i.e., the expansion holes 11, becomes smaller the further upward. The inside of fixed section 8 is equipped with along axial second through-hole 12, second through-hole 12 run through the upper and lower both ends of fixed section 8 and second through-hole 12 with inflation hole 11 communicates. A limiting ring 13 for limiting the first screw 3 to move along the axial direction is arranged in the second through hole 12, so that the first screw 3 is rotatably connected in the second through hole 12.

Further, a screw rod 14 is arranged in the second threaded hole 20, a tip cone 15 is arranged at the upper end of the screw rod 14, and the tip cone 15 moves upwards by rotating the first screw rod 3 so as to extrude all the movable plates 21 to be unfolded all around. Specifically, the first screw 3 rotates in the second through hole 12, and simultaneously pushes the screw rod 14 to move upward until the tip cone 15 presses all the movable pieces 21 and causes all the movable pieces 21 to spread all around, thereby being stuck in the drilled hole. Because the first screw rod 3 only rotates but does not axially displace, the first screw rod 3 does not protrude out of the wall surface, and the accurate installation is facilitated.

As shown in fig. 4, 5 and 6, in the present embodiment, the upper end of the second through hole 12 is provided with a first counter bore 16, the tip cone 15 is located in the first counter bore 16, and the first counter bore 16 and the expansion hole 11 are filled with a locking agent 17. The anti-loosening agent 17 is made of particle materials, and the rotation of the tip cone 15 can be further prevented after the anti-loosening agent 17 is filled. In addition, a second counter bore 18 is arranged at the lower end of the second through hole 12, a hexagonal prism 22 is arranged at the lower end of the first screw 3, and both the hexagonal prism 22 and the magnetic part 2 are located in the second counter bore 18. The hexagonal prism 22 can be adapted to a socket tool by which it is easier to turn the first screw 3.

In addition, the diameter of the expansion section 9 is gradually increased from top to bottom in the present embodiment. The cross-sectional shape of the expansion section 9 is a bullet shape which can be easily inserted into a drilled hole and is more labor-saving to knock the expansion pipe 1 in. The outer surfaces of all the movable sheets 21 are provided with anti-skid grains; the upper surface of the tip cone 15 is covered with the anti-slip protrusions 19. The anti-slip lines of the movable plate 21 increase the friction between the movable plate 21 and the hole, so that the temperature is fixed, and the anti-slip protrusions 19 on the tip cone 15 can prevent the tip cone 15 from rotating.

The embodiment also provides an installation method of the expansion bolt, which comprises the following steps:

s1, drilling a hole on the wall surface, wherein the diameter of the hole is approximately equal to that of the fixed section.

S2, the expansion section of the bullet type is inserted into the wall hole, and then the tail end of the fixing section is knocked, so that the whole fixing section is completely inserted, namely the tail end of the fixing section is flush with the wall surface, and the subsequent installation is prevented from being influenced. In the step, the bullet-shaped expansion section can be easily inserted into the wall hole, and the installation is very convenient. In addition, under the condition of the same length, only the fixed section is in extrusion contact with the wall surface hole, and compared with the whole expansion pipe of the existing expansion bolt in extrusion contact with the wall surface hole, the fixed section is small in contact area with the wall surface hole, smaller in friction resistance, lower in difficulty of knocking into the wall surface hole and easier to install.

S3, the wall hole in this embodiment is vertical upward. The hexagonal prism is rotated through the sleeve tool, the tip cone cannot rotate due to the anti-loosening agent, the screw rod can only push the tip cone to move upwards, the tip cone is continuously pushed into the expansion hole with the triangular cross section, and the expansion amplitude of the movable sheet is larger until the hexagonal prism cannot rotate. The anti-loosening agent can fill gaps existing when the movable sheet is unfolded, and the locking effect of the expansion section is further enhanced. In addition, the cross section of the tip cone is in an isosceles trapezoid shape, and the tip cone is fixedly connected with the screw rod through a cylinder. The tip cone plays a role of a pilot, and the cylinder plays a main role of extruding the movable sheet.

And S4, screwing a nut on the second screw rod downwards to fix the magnetic piece. And the other nut is rotated upwards for a set distance, so that the lower end of the magnetic part is just flush with the lower end of the fixed section after the second screw rod is screwed in the first threaded hole, and the installation is finished.

The installation method is particularly suitable for suspended ceiling construction, and after the expansion pipe is fixed in the wall surface hole at the top, no bulge exists, so that the requirement of subsequent suspended ceiling installation on the installation size is met.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. An expansion bolt assembly; the method is characterized in that: comprises an expansion pipe, a magnetic part, a first screw and a second screw; the first screw rod is located inside the expansion pipe, a first threaded hole matched with the second screw rod is formed in the lower end of the first screw rod, and the magnetic part is connected to the lower end of the second screw rod.

2. An expansion bolt assembly according to claim 1, wherein: the magnetic part is provided with a first through hole with the diameter smaller than that of a nut of the second screw rod, the second screw rod is sleeved with two nuts, one of the nuts is screwed on the lower end of the first screw rod, and the other nut is tightly pressed on the upper end of the magnetic part.

3. An expansion bolt assembly according to claim 2, wherein: the expansion pipe comprises a fixed section and an expansion section which are fixedly connected;

the expansion section is internally provided with an expansion hole extending along the central shaft, the expansion section is provided with a plurality of gaps extending along the radial direction, all the gaps penetrate through the upper end of the expansion section and are communicated with the expansion hole, and therefore the side wall of the expansion section forms a plurality of movable sheets;

4. An expansion bolt assembly according to claim 3, wherein: the outer surfaces of all the movable sheets are provided with anti-skid grains; and the upper surface of the tip cone is fully distributed with anti-skid protrusions.

5. An expansion bolt assembly according to claim 3, wherein: and a first counter bore is formed in the upper end of the second through hole, the tip cone is positioned in the first counter bore, and the first counter bore and the expansion hole are filled with anti-loosening agents.

6. An expansion bolt assembly according to claim 5, wherein: the lower end of the second through hole is provided with a second counter bore, the lower end of the first screw rod is provided with a hexagonal prism, and the hexagonal prism and the magnetic part are both located in the second counter bore.

7. An expansion bolt assembly according to claim 3, wherein: the axial section of the expansion hole is triangular.

8. An expansion bolt assembly according to claim 3, wherein: the number of the movable sheets is not less than four.

9. An expansion bolt assembly according to claim 3, wherein: the cross section of the tip cone is in an isosceles trapezoid shape; the tip cone is fixedly connected with the screw rod through a cylinder; the expansion section is gradually enlarged in diameter from top to bottom.

10. An installation method of an expansion bolt is characterized in that: an expansion bolt assembly as applied to claim 6, comprising the steps of:

s4, screwing a nut on the second screw rod downwards to fix the magnetic piece;