CN220850287U

CN220850287U - Novel expansion bolt

Info

Publication number: CN220850287U
Application number: CN202322847375.9U
Authority: CN
Inventors: 王文和
Original assignee: Wenzhou Yunsheng Standard Parts Co ltd
Current assignee: Wenzhou Yunsheng Standard Parts Co ltd
Priority date: 2023-10-24
Filing date: 2023-10-24
Publication date: 2024-04-26
Anticipated expiration: 2033-10-24

Abstract

The utility model relates to a novel expansion bolt, which comprises a bolt, a nut, expansion sliding blocks and expansion sleeves, wherein the two expansion sliding blocks are symmetrically penetrated on the bolt along the radial direction of the bolt, penetrating holes are formed in the expansion sliding blocks, the bolt is in threaded connection with the nut after sequentially penetrating through the penetrating holes of the two expansion sliding blocks, the expansion sliding blocks are provided with two first guide surfaces which are axially symmetrical along the bolt and are inclined to the axial direction of the bolt, the expansion sleeves are in a fan ring shape along the radial section, the two expansion sleeves are circumferentially arranged on the peripheral side of the bolt and are kept in fit through elastic rings sleeved on the two expansion sleeves, a second guide surface which is consistent with the first guide surface on the corresponding side in inclination is respectively formed on the inner sides of two ends of the expansion sleeves, and the expansion sliding blocks are inserted between the end parts of the two expansion sleeves so that the first guide surfaces are kept in fit with the second guide surfaces. The novel expansion bolt can ensure that the expansion sleeve is fully attached to the inner wall of the prefabricated hole to strengthen the firmness after installation, and the expansion bolt is easy to take out from the prefabricated hole, so that the expansion bolt is convenient to reuse.

Description

Novel expansion bolt

Technical Field

The utility model relates to the technical field of fasteners, in particular to a novel expansion bolt.

Background

Expansion bolts are a special threaded connection for securing pipe branches, hangers, brackets or equipment to walls, floors and columns.

In the prior art, expansion bolts are composed of bolts, expansion sleeves and nuts, one ends of the bolts are provided with threads, the other ends of the bolts are provided with tapers, the bolts penetrate through the expansion sleeves and are connected with the nuts to enable tapered ends of the bolts to be propped against ports of the expansion sleeves, the expansion sleeves penetrate into prefabricated holes formed in mounting surfaces, the tapered ends of the bolts are pulled through the nuts to enable the ends of the expansion sleeves to expand and tightly expand on the inner walls of the prefabricated holes, and therefore the expansion bolts are fixed.

The present utility model has been made in view of the above problems.

Disclosure of Invention

The utility model provides a novel expansion bolt, which solves the problems existing in the use process of the prior art.

The technical scheme of the utility model is realized as follows:

The utility model provides a novel expansion bolt, includes bolt and nut, still includes expansion slide and expansion sleeve, two expansion slide wears to locate on the bolt along bolt radial symmetry, wear to establish the hole on the expansion slide to offer, the bolt passes behind the hole of wearing of two expansion slide in proper order with the nut spiro union, expansion slide has two along bolt axial symmetry and incline to bolt axial first guide surface, expansion sleeve is 180 fan ring-shaped along radial cross-section, two expansion sleeve encircles and sets up in bolt week side and keep laminating through the elastic ring that overlaps on two expansion sleeve, expansion sleeve both ends inboard respectively is formed with one and corresponds the second guide surface that the first guide surface inclination of side is unanimous, expansion slide inserts between the tip of two expansion sleeve and makes first guide surface and second guide surface keep laminating.

Preferably, the elastic ring is made of iron wires which are curled and not connected end to end.

Preferably, the circumferential side surface of the expansion sleeve is provided with a limiting ring groove, and the elastic ring is positioned in the limiting ring groove.

Preferably, the first guide surface is provided with a prismatic guide block, the guide block is provided with a third guide surface with the same inclination as that of the first guide surface, the inner sides of the two ends of the expansion sleeve are respectively provided with a guide groove matched with the guide block, the guide grooves are provided with a fourth guide surface with inclination matched with that of the third guide surface on the corresponding side, and the guide block is kept in the guide groove to keep the third guide surface and the fourth guide surface in fit.

Preferably, the expansion slide block is provided with a reinforcing sleeve which is communicated with the penetrating hole and the end part of which is connected with the guide block.

Preferably, an anti-rotation gasket is arranged between the nut and one of the expansion sliding blocks, at least two first anti-rotation parts which are positioned on the periphery of the nut and are attached to the nut are formed on the anti-rotation gasket, and at least two second anti-rotation parts which are respectively positioned on one side of the two first guide surfaces and are respectively attached to the two first guide surfaces are formed on the anti-rotation gasket.

Preferably, a plurality of anti-rotation raised strips are formed on the peripheral side of the expansion sleeve, and the anti-rotation raised strips extend along the axial direction of the bolt.

In summary, the beneficial effects of the utility model are as follows: when installing expansion bolts, drive two expansion slide blocks and slide in opposite directions through rotation bolt and nut cooperation, in the gliding in-process of expansion slide block, through the cooperation effect of first guide surface and second guide surface, the expansion slide block pushes up two expansion casings and expands and tightly hold the laminating in the prefabricated downthehole, realize expansion bolts's installation, because under the effect of two expansion slide blocks that are located expansion casings both ends, expansion casings both ends receive expansion slide block's promotion and expand tightly in the prefabricated downthehole for expansion casings fully laminate with the prefabricated downthehole wall, avoid expansion bolts to swing in the prefabricated downthehole, thereby strengthened expansion bolts's the firmness of installing in the prefabricated downthehole, when dismantling this kind of expansion bolts, reverse rotation bolt makes expansion slide block loosen the tight effect of top to expansion casings, and under the effect of elastic ring, two expansion bolts draw in to the bolt and keep laminating again, make expansion bolts can take out from the prefabricated downthehole, thereby the reuse of expansion bolts of being convenient for.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is a schematic view of the structure of the expansion slide and the anti-rotation gasket in the present utility model;

Fig. 4 is a schematic view of the structure of an expansion sleeve according to the present utility model.

In the figure: 1. a bolt; 2. a nut; 3. an expansion slider; 31. penetrating holes; 32. a first guide surface; 33. a guide block; 34. a third guide surface; 35. reinforcing the sleeve; 4. expanding the casing; 41. a second guide surface; 42. a limit ring groove; 43. a guide groove; 44. a fourth guide surface; 5. an elastic ring; 6. an anti-rotation gasket; 61. a first rotation preventing part; 62. and a second rotation preventing part.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 4 of the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in the figure, the novel expansion bolt comprises a bolt 1, a nut 2, an expansion slide block 3 and an expansion sleeve 4, wherein the expansion slide block 3 is symmetrically arranged on the bolt 1 along the radial direction of the bolt 1, a penetrating hole 31 is formed in the expansion slide block 3, the bolt 1 sequentially penetrates through the penetrating holes 31 of the two expansion slide blocks 3 and then is in threaded connection with the nut 2, the expansion slide block 3 is provided with two first guide surfaces 32 which are axially symmetrical along the bolt 1 and are inclined to the axial direction of the bolt 1, the expansion sleeve 4 is in a sector ring shape with an radian of 180 DEG along the radial direction, the expansion sleeve 4 is arranged on the circumferential side of the bolt 1 in a surrounding manner and is kept in fit through elastic rings 5 sleeved on the two expansion sleeve 4, a second guide surface 41 which is consistent with the first guide surfaces 32 on the corresponding side is respectively formed on the inner sides of the two ends of the expansion sleeve 4, and the expansion slide block 3 is inserted between the ends of the two expansion sleeve 4 so that the first guide surfaces 32 are kept in fit with the second guide surfaces 41.

Specifically, the elastic ring 5 is made of iron wires which are curled and not connected end to end.

In the above embodiment, when installing such an expansion bolt, under the action of the elastic ring 5, two expansion casings 4 are kept in contact so as to facilitate the insertion of one end of the expansion bolt with the nut 2 into the prefabricated hole, the bolt 1 and the nut 2 are respectively abutted against the ends of the two expansion sliders 3 by rotating the bolt 1, and the two expansion sliders 3 are driven to slide on the bolt 1 in opposite directions along with the continued rotation of the bolt 1, in the process of sliding the expansion sliders 3, the expansion sliders 3 push and expand the two expansion casings 4 to expand in the prefabricated hole through the cooperation of the first guide surface 32 and the second guide surface 41, so that the installation of the expansion bolt is realized, and because the two ends of the expansion casings 4 are pushed by the expansion sliders 3 to expand in the prefabricated hole, the expansion casings 4 are fully contacted with the inner wall of the prefabricated hole, the expansion bolt is prevented from swinging in the prefabricated hole, so that the firmness of the expansion bolt installed in the prefabricated hole is enhanced, and when the expansion bolt is disassembled, the expansion bolts 1 are reversely rotated, the expansion sliders 3 are released to release the action of the expansion casings 4 to tightly lift the expansion casings 4, and the expansion bolts can be repeatedly taken out from the prefabricated hole under the action of the elastic ring 5, so that the expansion bolt can be repeatedly taken out.

Preferably, the circumferential side surface of the expansion sleeve 4 is provided with a limiting ring groove 42, the elastic ring 5 is located in the limiting ring groove 42, the limiting ring groove 42 can prevent the elastic ring 5 from falling off from the two expansion sleeves 4 after being sleeved on the two expansion sleeves 4, and the expansion bolts are ensured to be stable and integral during disassembly and assembly, so that the operation is convenient.

Preferably, the first guide surface 32 is formed with a prismatic guide block 33, the guide block 33 is provided with a third guide surface 34 with the same inclination as that of the first guide surface 32, the inner sides of two ends of the expansion sleeve 4 are respectively provided with a guide groove 43 matched with the guide block 33, the guide groove 43 is provided with a fourth guide surface 44 with the same inclination as that of the third guide surface 34 on the corresponding side, the guide block 33 is kept in the guide groove 43, the third guide surface 34 is kept in contact with the fourth guide surface 44, the guide block 33 slides in the guide groove 43 when the expansion slide block 3 slides, the expansion slide block 3 can stably slide relative to the expansion sleeve 4 so as not to deflect between the expansion slide block 3 and the expansion sleeve 4, so that the expansion sleeve 4 can stably push against the inner wall of the prefabrication hole, and when the guide block 33 slides in the guide groove 43, the third guide surface 34 keeps in contact with the fourth guide surface 44 so as to enlarge the contact area of the expansion slide block 3 and the expansion sleeve 4, the supporting force of the expansion slide block 3 on the expansion sleeve 4 is enhanced, the expansion slide block 3 slides in the guide groove 43, the expansion sleeve 4 is ensured to stably slide against the inner wall of the expansion sleeve 4, and the expansion sleeve 4 is stably mounted in the firm state, and the expansion bolt is stably kept against the inner wall, and the expansion sleeve 4 is stably supported against the inner wall is kept in the prefabrication hole.

Preferably, the expansion slide 3 is formed with a reinforcing sleeve 35 which is communicated with the through hole 31 and has an end connected with the guide block 33, and the reinforcing sleeve 35 is convenient for the bolt 1 to pass through the through hole 31 and simultaneously reinforces the sleeve to strengthen the integral strength of the expansion slide 3, so that the expansion slide 3 has enough rigidity to support the expansion sleeve 4 to tightly prop against the inner wall of the prefabricated hole, thereby ensuring the firmness of the expansion sleeve 4 after being installed.

Preferably, an anti-rotation gasket 6 is disposed between the nut 2 and one of the expansion sliders 3, at least two first anti-rotation parts 61 located on the circumferential side of the nut 2 and attached to the nut 2 are formed on the anti-rotation gasket 6, at least two second anti-rotation parts 62 respectively located on one side of the two first guiding surfaces 32 and attached to the two first guiding surfaces 32 are formed on the anti-rotation gasket 6, the first anti-rotation parts 61 apply a limit to the relative rotation of the nut 2 and the anti-rotation gasket 6 after attached to the circumferential side of the nut 2, and the second anti-rotation parts 62 apply a limit to the relative rotation of the anti-rotation gasket 6 and the expansion sliders 3 after attached to the first guiding surfaces 32, so that the nut 2 is ensured not to idle along with the bolt 1 when the bolt 1 rotates, the firmness of the expansion bolt after the installation of the bolt 1 can be ensured, and the disassembly of the expansion bolt is also convenient.

Preferably, a plurality of anti-rotation raised strips are formed on the peripheral side of the expansion sleeve 4, the anti-rotation raised strips axially extend along the bolt 1, and the anti-rotation raised strips are clamped into the inner wall of the prefabricated hole when the expansion sleeve 4 is tightly propped against the inner wall of the prefabricated hole, so that the expansion sleeve 4 cannot idle along with the rotation of the bolt 1, the bolt 1 can be rotated in place, the firmness of the expansion bolt after installation is guaranteed, and the expansion bolt is convenient to detach.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides a novel expansion bolts, includes bolt (1) and nut (2), its characterized in that: still including expansion slide block (3) and expansion sleeve (4), two expansion slide block (3) wear to locate on bolt (1) along bolt (1) radial symmetry, set up on expansion slide block (3) and wear to establish hole (31), bolt (1) pass behind the hole (31) of wearing of two expansion slide blocks (3) in proper order with nut (2) spiro union, expansion slide block (3) have two along bolt (1) axial symmetry and incline in bolt (1) axial first guide surface (32), expansion sleeve (4) are 180 degree fan ring-shaped along radial cross-section, two expansion sleeve (4) encircle and set up in bolt (1) week side and keep laminating through elastic ring (5) that the cover was located on two expansion sleeve (4), expansion sleeve (4) both ends inboard respectively be formed with one with correspond second guide surface (41) of side first guide surface (32) inclination, expansion slide block (3) insert between the tip of two expansion sleeve (4) make first guide surface (32) and keep laminating with second guide surface (41).

2. The novel expansion bolt according to claim 1, wherein: the elastic ring (5) is made of iron wires which are curled and are not connected end to end.

3. The novel expansion bolt according to claim 1, wherein: the circumferential side surface of the expansion sleeve (4) is provided with a limiting ring groove (42), and the elastic ring (5) is positioned in the limiting ring groove (42).

4. The novel expansion bolt according to claim 1, wherein: the first guide surface (32) is provided with a prismatic guide block (33), the guide block (33) is provided with a third guide surface (34) with the same inclination as that of the first guide surface (32), the inner sides of two ends of the expansion sleeve (4) are respectively provided with a guide groove (43) matched with the guide block (33), the guide grooves (43) are provided with a fourth guide surface (44) with the inclination matched with the third guide surface (34) on the corresponding side, and the guide block (33) is kept in the guide grooves (43) to keep the third guide surface (34) and the fourth guide surface (44) in fit.

5. The novel expansion bolt according to claim 1, wherein: the expansion slide block (3) is provided with a reinforcing sleeve (35) communicated with the penetrating hole (31) and the end part of which is connected with the guide block (33).

6. The novel expansion bolt according to claim 1, wherein: an anti-rotation gasket (6) is arranged between the nut (2) and one of the expansion sliding blocks (3), at least two first anti-rotation parts (61) which are positioned on the periphery of the nut (2) and are attached to the nut (2) are formed on the anti-rotation gasket (6), and at least two second anti-rotation parts (62) which are respectively positioned on one side of the two first guide surfaces (32) and are respectively attached to the two first guide surfaces (32) are formed on the anti-rotation gasket (6).

7. The novel expansion bolt according to claim 1, wherein: a plurality of anti-rotation raised strips are formed on the peripheral side of the expansion sleeve (4), and the anti-rotation raised strips extend along the axial direction of the bolt (1).