CN216554837U

CN216554837U - Special-shaped reverse detachable expansion bolt

Info

Publication number: CN216554837U
Application number: CN202123012181.4U
Authority: CN
Inventors: 哈增悦
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-05-17
Anticipated expiration: 2031-12-02

Abstract

The invention discloses a special-shaped reverse detachable expansion bolt which comprises a screw rod, a special-shaped retaining nut in threaded connection with the end part of the screw rod, and a corrugated expansion pipe sleeved outside the screw rod. The special-shaped retaining nut comprises a special-shaped section and a conical section, and at least four special-shaped bulges are uniformly distributed on the outer circumferential surface of the special-shaped section; the end with the larger diameter of the conical section is connected with the special-shaped section, and the end with the smaller diameter of the conical section faces the corrugated expansion pipe; at least three expansion joints are arranged on the body of the corrugated expansion pipe along the length direction, and the expansion joints are uniformly distributed on the outer circumference of the corrugated expansion pipe. The invention has the advantages that when objects are fixed on the wall surface or the ground, the screw rod is reversely inserted into the wall hole, and the screw rod can be pulled out after being disassembled. Only one screw hole is left on the wall surface and the ground surface, and white lime or cement and the like are smeared on the screw hole, so that the wall surface and the ground surface have no foreign matters, and the smoothness and the attractiveness of the wall surface or the ground surface can be restored. The pedestrian can not be damaged and stumbled when walking. The disassembled screw and accessories can be recycled.

Description

Special-shaped reverse detachable expansion bolt

Technical Field

The invention relates to the field of construction and installation operation of industrial and mining enterprises, in particular to a special-shaped reverse detachable expansion bolt.

Background

The ordinary expansion bolts of various objects for hanging and fixing are installed according to the installation requirements of different environments in various industries in China at present, and in many cases, the expansion bolts are inserted after holes are drilled in the wall surface (or the ground), then the objects are installed, and screws are screwed on to complete the fixation. If the bolt is disassembled, the bolt cannot be pulled out because the bolt is limited by the expansion of the bolt expansion head and the expansion pipe, and the screw is left to be exposed on the wall surface or the ground. Especially, the screw rods exposed on the wall surface and the ground are left by removing temporary buildings and billboards on the sides of indoor wall surfaces and outdoor roadside sidewalks, so that pedestrians can easily scrape clothes, scrape trousers, and touch and trip over when walking, and the pedestrian safety is very high.

Disclosure of Invention

The invention provides a special-shaped reverse detachable expansion bolt aiming at the problems, and solves the problems that when a traditional expansion bolt is detached, a screw cannot be pulled out, and potential safety hazards are left when the screw is exposed on a wall surface or a ground surface.

In order to achieve the purpose, the invention provides a special-shaped reverse detachable expansion bolt which comprises a screw rod, a special-shaped backstop nut screwed on the end part of the screw rod, and a corrugated expansion pipe sleeved outside the screw rod.

The special-shaped retaining nut comprises a special-shaped section and a conical section, and at least four special-shaped bulges are uniformly distributed on the outer circumferential surface of the special-shaped section; the end with the larger diameter of the conical section is connected with the special-shaped section, and the end with the smaller diameter of the conical section faces the corrugated expansion pipe; the diameter of the end with the larger diameter of the conical section is larger than the inner diameter of the corrugated expansion pipe, and the diameter of the end with the smaller diameter of the conical section is smaller than the inner diameter of the corrugated expansion pipe.

At least three expansion joints are formed in the body of the corrugated expansion pipe along the length direction, and the expansion joints are uniformly distributed on the outer circumference of the corrugated expansion pipe.

One end of the corrugated expansion pipe, which is far away from the special-shaped retaining nut, is also provided with a flat pad sleeved on the screw rod, and the other side of the flat pad is provided with a spring pad.

The other end part of the screw rod, which is far away from the special-shaped retaining nut, is provided with a tightening part which is tightly propped against the spring pad.

Above-mentioned abnormal shape is reverse can disassemble tight bolt that expands, and under preferred mode, the portion of screwing up is the nut that links firmly with the screw rod.

Above-mentioned special-shaped is reverse can disassemble tight bolt that expands, under preferred mode, its characterized in that sets up the link hole that is used for connecting the pull ring on the nut, and the pull ring is the U type to two inside archs of tip form the portion of hanging, and the portion of hanging inserts in the link hole.

Above-mentioned special-shaped is reverse can disassemble tight bolt that expands, under preferred mode, the link hole is the bell mouth that sets up relatively in the nut side.

Above-mentioned special-shaped is reverse can disassemble tight bolt that expands, under preferred mode, the link ring hole is the through-hole that transversely runs through the nut.

According to the special-shaped reverse detachable expansion bolt, in an optimal mode, the center of the end face of the nut is provided with the externally-hung screw hole.

Above-mentioned special-shaped is reverse can disassemble tight bolt that expands, under preferred mode, screws up the portion and is two spiro union nuts at the screw tip, sets up flat pad and spring pad between two nuts.

Above-mentioned special-shaped is reverse can disassemble tight bolt that expands, and under preferred mode, the seam that expands that sets up on the tight pipe of ripple is four to six, and length expands 2/3 to 3/4 of tight pipe total length for the ripple, and the position is in the middle part of the tight pipe length direction of ripple expansion.

Above-mentioned special-shaped is reverse can disassemble tight bolt that expands, under preferred mode, the outside of special-shaped section is to the smooth transition section of interior chamfer formation round platform form.

Above-mentioned special-shaped is reverse can disassemble tight bolt that expands, under preferred mode, special-shaped protruding for four to eight cuboid structures along the outer circumference evenly distributed of special-shaped section.

The invention has the advantages that when objects are fixed on the wall surface or the ground, the screw rod is reversely inserted into the wall hole, and the screw rod can be pulled out after being disassembled. The screw rod can not be left in the wall or the ground, only a special-shaped retaining nut and a corrugated expansion pipe are left in the hole, and only one screw hole is left in the wall surface and the ground. Then the wall surface and ground surface can be restored to be flat and beautiful by plugging with wood blocks or paper rolls, plastering lime or cement and the like, and no foreign matter on the wall surface or ground surface. The pedestrian can not be damaged and stumbled when walking. The disassembled screw and accessories can be recycled.

Drawings

FIG. 1 is an assembly schematic of the present invention.

Fig. 2 is a half sectional view of the overall structure of the present invention after assembly.

Fig. 3 is a front view of the overall structure of the present invention after assembly.

Fig. 4 is a schematic structural diagram of embodiment 5 of the present invention.

FIG. 5 is a schematic structural view of the special-shaped retaining nut of the present invention.

Fig. 6 is a sectional view a-a of fig. 5.

Fig. 7 is a sectional view B-B of fig. 1.

Figure 8 is a schematic view of the overall structure of the tab of the present invention.

In the figure: 1. the special-shaped anti-back nut comprises a screw rod, 2, a special-shaped anti-back nut, 3, a corrugated expansion pipe, 4, a flat gasket, 5, a spring gasket, 6, a ring hanging hole, 7, an externally-hung screw hole, 11, a tightening part, 21, a special-shaped section, 22, a conical section, 211, a special-shaped bulge, 31, an expansion joint, 61 and a pull ring.

Detailed Description

Example 1:

as shown in figure 1, the special-shaped reverse detachable expansion bolt comprises a screw rod 1, a special-shaped retaining nut 2 screwed on the end part of the screw rod 1, and a corrugated expansion pipe 3 sleeved outside the screw rod 1.

As shown in fig. 5 and 6, the special-shaped retaining nut 2 comprises a special-shaped section 21 and a conical section 22, and at least four special-shaped protrusions 211 are uniformly distributed on the outer circumferential surface of the special-shaped section 21. Preferably, the special-shaped protrusions 211 are four to eight rectangular parallelepiped structures uniformly distributed along the outer circumference of the special-shaped section 21, and the outer end of the special-shaped section 21 is chamfered inwards to form a truncated cone-shaped smooth transition section.

The end with the larger diameter of the conical section 22 is connected with the special-shaped section 21, and the end with the smaller diameter of the conical section 22 faces the corrugated expansion pipe 3; the diameter of the end with the larger diameter of the conical section 22 is larger than the inner diameter of the corrugated expansion pipe 3, and the diameter of the end with the smaller diameter of the conical section 22 is smaller than the inner diameter of the corrugated expansion pipe 3.

As shown in fig. 2 to 3, at least three expansion joints 31 are formed on the body of the corrugated expansion pipe 3 along the length direction, and the expansion joints 31 are uniformly distributed on the outer circumference of the corrugated expansion pipe 3; preferably, the expansion joints formed in the corrugated expansion pipe 3 are four to six, the length of the expansion joints is 2/3 to 3/4 of the total length of the corrugated expansion pipe 3, and the expansion joints are located in the middle of the corrugated expansion pipe 3 in the length direction.

As shown in fig. 1 and 2, one end of the corrugated expansion pipe 3, which is far away from the special-shaped retaining nut 2, is further provided with a flat pad 4 sleeved on the screw rod 1, and the other side of the flat pad 4 is provided with a spring pad 5.

As shown in fig. 2, a tightening part 11 is provided on the other end of the screw 1 away from the special-shaped retaining nut 2, and the tightening part 11 is pressed against the spring washer 5.

In the present embodiment, the tightening unit 11 is a nut fixedly connected to the screw 1.

During construction, the special-shaped retaining nut 2 is screwed on the screw rod 1, the corrugated expansion pipe 3 is sleeved on the special-shaped retaining nut, the flat gasket 4 is sleeved on the screw rod 1, the spring gasket 5 is placed into the screw rod 1 with the accessory, the screw rod 1 with the accessory is inserted into the wall hole, the corrugated expansion pipe 3 is screwed, the screw rod 1 is reversely screwed and detached, and the spring gasket 5 and the flat gasket 4 are kept on the screw rod. Then the screw rod is inserted into the wall hole or the road surface hole after penetrating through the object hole to be fixed, and the object can be fixed by clockwise stress application and screwing, so that the object is attractive and safe.

Example 2:

as shown in fig. 7, the embodiment 2 is different from the embodiment 1 in that a hanging ring hole 6 for connecting a hanging ring 61 is formed in a nut. The hanging ring hole 6 is a conical hole which is oppositely arranged on the side surface of the screw cap.

As shown in fig. 8, the tab 61 is U-shaped, and both end portions are inwardly protruded to form hanging portions, which are inserted into the hanging ring holes 6.

According to the arrangement mode, if an article needing to be hung is hung on the pull ring 61 directly, the use is more convenient.

Example 3:

embodiment 3 differs from embodiment 2 in that the suspension eye 6 is a through hole running transversely through the nut. By adopting the arrangement mode, when in need, the pull ring 61 can be detached, and then the cross rod with a proper size is inserted into the through hole, so that certain specific needs are facilitated, and the applicability of the product is wider.

Example 4:

as shown in fig. 1 and 7, the difference between the embodiment 4 and the embodiments 1-3 is that the center of the end surface of the nut is provided with an externally-hanging screw hole 7, and a screw can be screwed into the externally-hanging screw hole 7 when necessary, so as to hang or fix an object by the screw. The use is more convenient, and the suitability is stronger.

Example 5:

as shown in fig. 4, embodiment 5 differs from the other embodiments in that the tightening part 11 is two nuts screwed to the ends of the screw 1, and a flat washer and a spring washer are provided between the two nuts.

By adopting the embodiment, if heavy accessories need to be hung, during installation, one end of the special-shaped retaining nut 2 is forcibly inserted into the hole, then the nut on the inner side is screwed tightly by a wrench, so that the corrugated expansion pipe 3 on the screw rod 1 is expanded, then an object to be hung is threaded into the screw rod 1, and finally the flat gasket 4 and the spring gasket 5 are screwed with the tightening nut on the outer side, so that great convenience is provided for installing large objects, and the stability of the large objects is improved.

During disassembly, the outer nut is screwed down, the suspended object, the flat pad 4 and the spring pad 5 are taken down, the outer nut is mounted, the outer nut is tightly pressed with the inner nut when being screwed, then the inner nut is rotated anticlockwise, and the whole screw rod 1 can be screwed out.

In order to prevent nut corrosion and difficult disassembly, glycerol can be coated in the nut and the screw.

The screw of the present invention is preferably a screw having a diameter of 8mm, and the length is not limited. The screw may also be stepped, depending on the particular application.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. The special-shaped reverse detachable expansion bolt is characterized by comprising a screw rod (1), a special-shaped retaining nut (2) screwed at the end part of the screw rod (1) and a corrugated expansion pipe (3) sleeved outside the screw rod (1);

the special-shaped retaining nut (2) comprises a special-shaped section (21) and a conical section (22), and at least four special-shaped protrusions (211) are uniformly distributed on the outer circumferential surface of the special-shaped section (21); the end with the larger diameter of the conical section (22) is connected with the special-shaped section (21), and the end with the smaller diameter of the conical section (22) faces the corrugated expansion pipe (3); the diameter of the end with the larger diameter of the conical section (22) is larger than the inner diameter of the corrugated expansion pipe (3), and the diameter of the end with the smaller diameter of the conical section (22) is smaller than the inner diameter of the corrugated expansion pipe (3);

at least three expansion joints (31) are formed in the body of the corrugated expansion pipe (3) along the length direction, and the expansion joints (31) are uniformly distributed on the outer circumference of the corrugated expansion pipe (3);

one end of the corrugated expansion pipe (3), which is far away from the special-shaped retaining nut (2), is also provided with a flat pad (4) sleeved on the screw rod (1), and the other side of the flat pad (4) is provided with a spring pad (5);

and a screwing part (11) is arranged at the other end part of the screw rod (1) far away from the special-shaped retaining nut (2), and the screwing part (11) is tightly pressed on the spring pad (5).

2. The profiled reverse detachable expansion bolt according to claim 1, characterized in that the tightening part (11) is a nut fixedly connected with the screw (1).

3. The profiled reverse releasable expansion bolt according to claim 2, wherein the nut is provided with a suspension ring hole (6) for connecting a suspension ring (61), the suspension ring (61) is U-shaped, and two ends of the suspension ring protrude inwards to form a suspension part, and the suspension part is inserted into the suspension ring hole (6).

4. The profiled reverse detachable expansion bolt according to claim 3, characterized in that the ring hole (6) is a tapered hole oppositely arranged on the side of the nut.

5. The profiled reverse detachable expansion bolt according to claim 3, characterized in that the ring hole (6) is a through hole which transversely penetrates the nut.

6. The special-shaped reverse detachable expansion bolt according to claim 2, characterized in that the center of the end surface of the nut is provided with an externally-hung screw hole (7).

7. The profiled reverse detachable expansion bolt according to claim 1, characterized in that the tightening part (11) is two nuts screwed on the end of the screw (1), and a flat cushion and a spring cushion are arranged between the two nuts.

8. The profiled reverse detachable expansion bolt according to claim 1, characterized in that the corrugated expansion pipe (3) is provided with four to six expansion joints, the length of the expansion joints is 2/3 to 3/4 of the total length of the corrugated expansion pipe (3), and the expansion joints are positioned in the middle of the corrugated expansion pipe (3) in the length direction.

9. The profiled reverse detachable expansion bolt according to claim 1, characterized in that the outer end of the profiled section (21) is chamfered inwards to form a smooth transition section in the shape of a truncated cone.

10. The special-shaped reverse detachable expansion bolt according to any one of claims 1 to 9, characterized in that the special-shaped protrusions (211) are of four to eight rectangular parallelepiped structures uniformly distributed along the outer circumference of the special-shaped section (21).