CN210218351U

CN210218351U - Expansion bolt

Info

Publication number: CN210218351U
Application number: CN201921120227.4U
Authority: CN
Inventors: Jianwen Chen; 陈建文
Original assignee: Wenzhou Wanya Fastener Co Ltd
Current assignee: Wenzhou Wanya Fastener Co Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-03-31
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses an expansion bolt relates to the fastener field, including expansion pipe, packing ring, nut and screw rod, the screw rod is installed in the expansion pipe, and passes through packing ring and nut are fixed, its characterized in that: the expansion pipe inner wall and outer wall all set up along length direction and the inside and outside mounting groove that corresponds, be equipped with a plurality of along length direction and from the interior nail of wearing to establish outward on the mounting groove, a plurality of openings and interval formation many expansion pieces have been seted up to one section axial of expansion pipe, the one end of screw rod be equipped with expansion piece complex pretension cone, still be equipped with the toper cover between pretension cone and the expansion piece, the screw rod pass behind the toper cover with pretension cone threaded connection. The utility model has the advantages of preventing looseness.

Description

Expansion bolt

Technical Field

The utility model relates to a fastener field, concretely relates to expansion bolts.

Background

The traditional expansion bolt is simple, the appearance of an expansion pipe is smooth, the expansion pipe is suitable for small-sized workpieces and occasions with low requirements, and is mainly used for civil products and decoration construction industry, but with the development and progress of the society, the application surface of the expansion bolt relates to occasions with high requirements, such as the installation and fixation of large-sized equipment, the installation of products in narrow space, high-altitude operation and the like, the traditional expansion bolt cannot adapt to the environment, because the outer wall of the expansion pipe sleeve is smooth when the expansion pipe sleeve is installed and fixed, the expansion pipe sleeve is easy to loosen and slide when the expansion pipe sleeve is installed, the fixation of small-quality products and products with low requirements can be accepted, and the loosening and sliding of the expansion bolt are fatal defects of installation when the large-sized products and key equipment are fixed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiency of the background art, the utility model provides a prevent not hard up, expansion bolts of pretension formula.

The utility model discloses the technical scheme who adopts: an expansion bolt, includes expansion tube, packing ring, nut and screw rod, the screw rod is installed in the expansion tube to pass through the packing ring and the nut is fixed, its characterized in that: the expansion pipe inner wall and outer wall all set up along length direction and the inside and outside mounting groove that corresponds, be equipped with a plurality of along length direction and from the interior nail of wearing to establish outward on the mounting groove, a plurality of openings and interval formation many expansion pieces have been seted up to one section axial of expansion pipe, the one end of screw rod be equipped with expansion piece complex pretension cone, still be equipped with the toper cover between pretension cone and the expansion piece, the screw rod pass behind the toper cover with pretension cone threaded connection.

The pre-tightening cone comprises a tapered surface and a pre-tightening section, the tapered surface is arranged at the upper end of the pre-tightening section and is integrally formed with the screw rod, the upper end of the tapered surface is matched and mounted with the tapered sleeve, an axial through hole is formed in the center of the pre-tightening cone, and threads are arranged on the inner wall of the through hole.

The head part of the top nail in the expansion pipe is in a spherical crown shape.

The outer wall surface of the expansion sheet is provided with a conical bulge which gradually rises towards the tail end direction.

The section of the pre-tightening section is a regular polygon.

The conical sleeve is thin at the top and thick at the bottom, and a plurality of openings are formed in the lower portion of the conical sleeve.

And opposite threads are arranged at two ends of the screw rod and are respectively connected with the nut and the pre-tightening cone in a matched manner.

The utility model has the advantages that:

1. according to the technical scheme, the pre-tightening cone matched with the screw rod is arranged, the pre-tightening section is arranged at the end part of the pre-tightening cone, the pre-tightening cone and the screw rod can rotate through the pre-tightening section under the condition that a drill hole is large, the conical sleeve or/and the expansion pipe are pre-tightened, and the situation that the conical sleeve or/and the expansion pipe cannot be fastened due to rotation in the drill hole during fastening is avoided;

2. the jacking nail in the technical scheme enables the expansion bolt embedded in the installation part to expand to achieve the purpose of fixing, is easier to install and fix than the traditional expansion bolt, and can be installed on thin-wall buildings and in narrow spaces.

Drawings

Fig. 1 is a schematic structural view of an expansion bolt according to an embodiment of the present invention.

Fig. 2 is a schematic sectional view of an expansion bolt.

Fig. 3 is a schematic structural view of the conical sleeve.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in the figures, the expansion bolt comprises an expansion pipe 1, a washer 2, a nut 3 and a screw rod 4, wherein the screw rod 4 is installed in the expansion pipe 1 and is fixed by the washer 2 and the nut 3, and the expansion bolt is characterized in that: the inner wall and the outer wall of the expansion pipe 1 are both provided with mounting grooves 11 which are arranged along the length direction and correspond to each other inside and outside, a plurality of top nails 12 which penetrate through the mounting grooves 11 from inside to outside along the length direction are arranged on the mounting grooves, a section of the expansion pipe 1 is axially provided with a plurality of openings and forms a plurality of expansion sheets 13 at intervals, one end of the screw rod 4 is provided with a pre-tightening cone 5 which is matched with the expansion sheets 13, a conical sleeve 6 is also arranged between the pre-tightening cone 5 and the expansion sheets 13, and the screw rod 4 penetrates through the conical sleeve 6 and then is in threaded connection with the pre-tightening; according to the technical scheme, the pre-tightening cone matched with the screw rod is arranged, the pre-tightening section is arranged at the end part of the pre-tightening cone, the pre-tightening cone and the screw rod can rotate through the pre-tightening section under the condition that a drill hole is large, the conical sleeve or/and the expansion pipe are pre-tightened, and the situation that the conical sleeve or/and the expansion pipe cannot be fastened due to rotation in the drill hole during fastening is avoided;

in addition, the ejection of the top nail in the technical scheme enables the expansion bolt embedded in the installation part to expand, so that the purpose of fixing is achieved, the expansion bolt is easier to install and fix than the traditional expansion bolt, and the expansion bolt can be especially installed on thin-wall buildings and in narrow spaces.

The pre-tightening cone 5 comprises a conical surface 51 with a thin upper part and a thick lower part and a pre-tightening section 52 used for driving the pre-tightening cone 5 and the screw rod 4 to rotate relatively, the conical surface 51 is positioned at the upper end of the pre-tightening section 52 and is integrally formed with the pre-tightening section 52, the upper end of the conical surface 51 is matched and installed with the conical sleeve, an axial through hole is formed in the center of the pre-tightening cone 5, and threads are arranged on the inner wall of the through hole.

The head part of the top nail 12 positioned in the expansion pipe 1 is in a spherical crown shape, and in the installation process of the expansion bolt, the top nail is ejected outwards by the screw rod, so that the spherical crown shape is designed, and the blockage between the screw rod and the top nail in the installation process is avoided.

The outer wall surface of the expansion sheet 13 is provided with a conical bulge 7 which gradually rises towards the tail end direction, and the expansion sheet is jacked up by the pre-tightening cone and firmly pricked into the wall to prevent the expansion pipe from outwards withdrawing.

The cross section of the pre-tightening section 52 is a regular polygon.

The taper sleeve 6 is thin from top to bottom thick, a plurality of openings have been seted up to 6 lower parts of taper sleeve, are provided with the taper sleeve, can increase the expansion range of expansion pipe, effectively improve the fastening degree when using, and the taper sleeve can be in proper order as required to the suit is a plurality ofly moreover to increase tight effect that rises.

Opposite threads are arranged at two ends of the screw rod 4 and are respectively matched and connected with the nut 3 and the pre-tightening cone 5, when the expansion pipe is used, if the drilled hole of the working surface is larger than the outer diameter of the expansion pipe, the pre-tightening cone is matched with the pre-tightening section of the pre-tightening cone through a tool at the moment, the pre-tightening cone and the screw rod are screwed, the conical surface of the pre-tightening cone continuously extrudes the conical sleeve in the screwing process, and meanwhile, the conical sleeve continuously extrudes the expansion pipe. After toper cover and expansion pipe received the extrusion, the outside expansion of the expansion pipe expansion piece of the toper cover expansion piece of its toper cover and expansion pipe, make the external diameter grow of expansion pipe lower part, after the external diameter of expansion pipe lower part can match with drilling, pack into the drilling with the expansion screw whole, then screw the nut outside the working face, at the in-process of screwing up the nut, the pretension cone conical surface of pretension cone constantly extrudes the toper cover, the expansion pipe is constantly extruded to the toper cover simultaneously, the expansion piece of toper cover and the expansion piece of expansion pipe expand outward, finally reliably fix this pretension formula expansion screw with drilling.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.

Claims

1. An expansion bolt, includes expansion pipe (1), packing ring (2), nut (3) and screw rod (4), screw rod (4) are installed in expansion pipe (1) to pass through packing ring (2) and nut (3) are fixed, its characterized in that: expansion pipe (1) inner wall and outer wall are all seted up along length direction setting and inside and outside mounting groove (11) that correspond, be equipped with a plurality of nail (12) of wearing to establish along length direction and from the interior toward outer on mounting groove (11), a plurality of openings and interval formation many expansion pieces (13) have been seted up to one section axial of expansion pipe (1), the one end of screw rod (4) be equipped with expansion piece (13) complex pretension cone (5), still be equipped with between pretension cone (5) and expansion piece (13) taper sleeve (6), screw rod (4) pass behind taper sleeve (6) with pretension cone (5) threaded connection.

2. The expansion bolt according to claim 1, characterized in that: the pre-tightening cone (5) comprises a conical surface (51) which is thin in upper part and thick in lower part and a pre-tightening section (52) which is used for driving the pre-tightening cone (5) and the screw rod (4) to rotate relatively, the conical surface (51) is located at the upper end of the pre-tightening section (52) and is integrally formed with the pre-tightening section, the upper end of the conical surface (51) is installed in a matched mode with the conical sleeve, an axial through hole is formed in the center of the pre-tightening cone (5), and threads are arranged on the inner wall of the through hole.

3. The expansion bolt according to claim 1, characterized in that: the head part of the top nail (12) positioned in the expansion pipe (1) adopts a spherical crown shape.

4. The expansion bolt according to claim 1, characterized in that: the outer wall surface of the expansion sheet (13) is provided with a conical bulge (7) which gradually rises towards the tail end direction.

5. The expansion bolt according to claim 2, characterized in that: the section of the pre-tightening section (52) is a regular polygon.

6. The expansion bolt according to claim 1, characterized in that: the conical sleeve (6) is thin at the top and thick at the bottom, and a plurality of openings are formed in the lower part of the conical sleeve (6).

7. The expansion bolt according to claim 1, characterized in that: opposite threads are arranged at two ends of the screw rod (4) and are respectively connected with the nut (3) and the pre-tightening cone (5) in a matched mode.