CN212003864U

CN212003864U - Novel expansion bolt

Info

Publication number: CN212003864U
Application number: CN202020060709.1U
Authority: CN
Inventors: 李雷平
Original assignee: Shenzhen Xinghongxiang Hardware And Building Materials Co ltd
Current assignee: Shenzhen Xinghongxiang Hardware And Building Materials Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-11-24
Anticipated expiration: 2030-01-10

Abstract

The utility model is suitable for an expansion bolts field provides a novel expansion bolts, the utility model discloses a realize like this, a novel expansion bolts, its characterized in that, including screw rod, hexagon nut, separation ring and sleeve, compare with prior art, the beneficial effects of the utility model are that: the auto-lock effect of double thread is better than the auto-lock effect of single thread, the life that also increases to adopt the expansion mode of double petal formula, make the fastening performance of expansion bolts outstanding more.

Description

Novel expansion bolt

Technical Field

The utility model belongs to the expansion bolts field especially relates to a novel expansion bolt.

Background

The fixing principle of the expansion screw is that the wedge-shaped slope is used to make the expansion generate friction binding force to achieve the fixing effect. One end of the screw is provided with threads, and the other end of the screw is provided with a taper. The steel sheet is covered on the outer surface, a plurality of cuts are arranged on one half of the iron sheet cylinder, the steel sheet cylinder and the cuts are plugged into a hole drilled on a wall together, then a nut is locked, the nut pulls a screw outwards to pull the taper into the steel sheet cylinder, the steel sheet cylinder is expanded and then is tightly fixed on the wall, and the steel sheet cylinder is generally used for fastening protective guards, awning, air conditioners and the like on materials such as cement, bricks and the like. However, it is not very reliable in its fixation and may come loose if the load is subjected to large shocks, so that it is not recommended to install ceiling fans and the like. The expansion bolt is characterized in that after the expansion bolt is drilled into a hole in the ground or the wall, a nut on the expansion bolt is screwed by a spanner, the bolt moves outwards, but a metal sleeve outside the bolt is still, so that the metal sleeve is expanded by a big head at the bottom of the bolt to fully expand the whole hole, and the expansion bolt cannot be drawn out. The expansion bolt of the existing specification is used for realizing the fastening function by expanding the single-head pipe wall, the nut of the expansion bolt is short in service life, the bolt fixing stability is poor, and the pretightening force is required to be provided for the expansion bolt by hands, so that the installation deviation is large.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel expansion bolt aims at solving the problem that proposes in the background art.

The utility model is realized in such a way, a novel expansion bolt is characterized in that the expansion bolt comprises a screw rod, a hexagon nut, a blocking ring and a sleeve, the screw comprises a shaft part, a head part and a cone part, wherein the shaft part, the head part and the cone part are all provided with threads, the head part is provided with a groove, the hexagon nut is arranged on the shaft part of the screw rod, the sleeve comprises a through hole shaft part, a fixed boss, a first petal part and a second petal part, a cone-shaped through hole is formed on the inner side of the second petal part, a thread is formed on the surface of the cone-shaped through hole, the outer surface of the through hole shaft part is provided with the fixed boss, the minimum radius of the blocking ring is smaller than the inner diameter of the first petal part, the screw rod is arranged in the sleeve in a penetrating way, the shaft part of the screw rod is positioned in the through hole shaft part of the sleeve, and the thread on the cone part of the screw is matched with the thread on the cone-shaped through hole on the petal part.

Further, the radius on the head portion is larger than the radius on the shaft portion.

Further, the outer diameter of the hexagonal nut is larger than the peripheral radius of the sleeve.

Further, the large circular surface of the tapered through-hole is close to the through-hole shaft portion.

Further, the fixing boss is inserted into the wall for preventing the sleeve from rotating together with the screw.

Further, the length of the fixing boss is smaller than that of the shaft part of the through hole.

Further, the blocking ring is formed with a through hole for fixing the blocking ring.

Firstly, a hole with the same size as the sleeve is punched on the wall by a hole-rotating machine, a groove capable of containing a fixed boss is processed around the hole, an expansion bolt is placed in the hole, the blocking ring is fixed on the hole by the bolt, a screw rod is inserted into the sleeve, and the screw rod starts to be screwed by a screwdriver, at the initial stage, the sleeve has an outward tendency, at the moment, the blocking ring is inserted into the first petal of the sleeve, when the outward force of the sleeve is larger, the circumferential force of the blocking ring on the first petal part of the sleeve is larger, the outward expansion amplitude of the first petal part is larger, so that the outward force of the sleeve is blocked, the sleeve is fixed, then the expansion amplitude of the second petal part of the screw rod is continuously screwed, the screw rod is fixed, the hexagon nut is screwed, and the installation of the expansion bolt is completed. Compared with the prior art, the beneficial effects of the utility model are that: the auto-lock effect of double thread is better than the auto-lock effect of single thread, the life that also increases to adopt the expansion mode of double petal formula, make the fastening performance of expansion bolts outstanding more.

Drawings

FIG. 1 is a structural diagram of the present invention;

FIG. 2 is a view of the screw structure of the present invention;

fig. 3 is a diagram of the sleeve structure of the present invention;

fig. 4 is a cross-sectional view of a sleeve according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 4, the novel expansion bolt is characterized by comprising a screw 1, a hexagon nut 2, a blocking ring 3 and a sleeve 4, wherein the screw 1 comprises a shaft 101, a head 102 and a taper 103, the shaft 101, the head 102 and the taper 103 are all provided with threads, the head 102 is provided with a groove 104, the hexagon nut 2 is mounted on the shaft of the screw 1, the sleeve 4 comprises a through-hole shaft 401, a fixing boss 402, a first petal part 403 and a second petal part 404, the inner side of the second petal part 404 is provided with a cone-shaped through-hole 405, the surface of the cone-shaped through-hole 405 is provided with threads, the outer surface of the through-hole shaft 401 is provided with the fixing boss 402, the minimum radius of the blocking ring 3 is smaller than the inner diameter of the first petal part 403, the screw 1 is arranged in the sleeve 4, the through-hole 101 of the screw 1 is arranged in the through-hole 401 of the sleeve 4, the thread on the conical part 103 of the screw 1 is matched with the thread on the conical through hole 405 on the second petal part 404; the radius on the head portion 102 is larger than the radius on the shaft portion 101; the outer diameter of the hexagonal nut 2 is larger than the peripheral radius of the sleeve 4; the large circular surface of the tapered through-hole 405 is close to the through-hole shaft 401; the fixing boss 402 is inserted into the wall for preventing the sleeve 4 from rotating along with the screw 1; the length of the fixing boss 402 is smaller than that of the through hole shaft part 401; the blocking ring 3 is formed with a through hole for fixing the blocking ring 3.

Firstly, a hole with the same size as the sleeve 4 is punched on the wall by a hole-rotating machine, a groove capable of accommodating the fixing boss 402 is processed around the hole, an expansion bolt is placed in the hole, the blocking ring 3 is fixed on the hole by a bolt, the screw 1 is inserted into the sleeve 4, and the screw 1 is started to be rotated by a screwdriver, at the initial stage, the sleeve 4 tends to be outward, at the moment, the blocking ring 3 is inserted into the first petal 403 in the sleeve 4, when the outward force of the sleeve 4 is larger, the circumferential force of the blocking ring 3 on the first petal part 403 on the sleeve 4 is also larger, the outward expansion amplitude of the first petal part 403 is also larger, so that the outward force of the sleeve 4 is blocked, the sleeve 4 is fixed, then the expansion amplitude of the second petal 404 of the screw 1 is gradually increased when the screw 1 is continuously screwed, the screw 1 is screwed, and the installation of the expansion bolt is completed. Compared with the prior art, the beneficial effects of the utility model are that: the self-locking effect of double thread is better than the self-locking effect of single thread, also increased life to adopt the expansion mode of double petal formula, make expansion bolts's fastening performance go out more.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The novel expansion bolt is characterized by comprising a screw (1), a hexagon nut (2), a blocking ring (3) and a sleeve (4), wherein the screw (1) comprises a shaft part (101), a head part (102) and a cone part (103), threads are formed on the shaft part (101), the head part (102) and the cone part (103), a groove (104) is formed on the head part (102), the hexagon nut (2) is installed on the shaft part of the screw (1), the sleeve (4) comprises a through hole shaft part (401), a fixing boss (402), a first petal part (403) and a second petal part (404), a cone-shaped through hole (405) is formed on the inner side of the second petal part (404), threads are formed on the surface of the cone-shaped through hole (405), the fixing boss (402) is formed on the outer surface of the through hole shaft part (401), and the minimum radius on the blocking ring (3) is smaller than the inner diameter of the first petal part (403), the screw (1) penetrates through the sleeve (4), the shaft part (101) of the screw (1) is located in the through hole shaft part (401) of the sleeve (4), and threads on the conical part (103) of the screw (1) are matched with threads on the conical through hole (405) on the second petal part (404).

2. A new expansion bolt according to claim 1, characterised in that the radius on the head part (102) is larger than the radius on the shaft part (101).

3. A new expansion bolt according to claim 1, characterised in that the outer diameter of the hexagonal nut (2) is larger than the peripheral radius of the sleeve (4).

4. A new expansion bolt according to claim 1, characterised in that the large circular surface of the conical through hole (405) is close to the through hole shaft part (401).

5. A new expansion bolt according to claim 3, characterized in that the fixing boss (402) is inserted into the wall for preventing the sleeve (4) from rotating along with the threaded rod (1).

6. A new expansion bolt according to claim 4, characterized in that the length of the fastening boss (402) is smaller than the length of the through hole shaft (401).

7. A new expansion bolt according to claim 1, characterised in that the barrier ring (3) is formed with through holes for fixing the barrier ring (3).