CN201386718Y

CN201386718Y - Novel expansion screw

Info

Publication number: CN201386718Y
Application number: CN200920037099U
Authority: CN
Inventors: 张彦
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-13
Filing date: 2009-02-13
Publication date: 2010-01-20
Anticipated expiration: 2019-02-13

Abstract

The utility model relates to a novel expansion screw which solves the technical problems of complicated structure, inconvenient using, low intensity and the like of the prior art. The novel expansion screw comprises a column-shaped main body. A thread is arranged at one end of the main body, a plurality of expansion pieces are arranged at the other end of the main body, the end part of the main body is divided to form the expansion pieces, the circumferences of the expansion pieces are surrounded together, the inner ends of the expansion pieces and the main body are connected into one body, a through hole is arranged in the center of the main body, a core rod can be inserted into the through hole, one end of the core rod is tapered, and a force bearing part is arranged at the other end of the core rod. The outer diameter of the core rod is adapted with the inner diameter of the through hole; when the core rod is inserted into the through hole, the end part of the core rod can jack and press the expansion pieces so as to lead the outer ends of the expansion pieces to be spread outwards. The advantages of the novel expansion screw are as follows: 1. the design is reasonable, the structure is simple and the mechanical intensity is high; 2. as the core rod is inserted to realize expansion after the main body is fixed, when the main body needs to be fixed anew under the circumstances of poor construction and the like, the disassembling can be conveniently carried out before the core rod is inserted, thereby effectively improving the using flexibility.

Description

Novel setscrew

Technical field

The utility model relates to field of mechanical technique, relates to fastening piece, especially relates to a kind of novel setscrew.

Background technique

Setscrew is widely used, and in multiple occasion application is arranged all.In order to improve its working stability, people have carried out long-term exploration, have proposed various solutions.For example, Chinese patent literature discloses a kind of novel setscrew [application number: CN200520012543.1], this setscrew comprises that an end has externally threaded screw rod, nut and pad, it is characterized in that: the forward part of described screw rod is carved with slotted eye, the rear section is scabbled, scabble part at it and have through hole, the lock bar is through in the through hole, and push rod is installed in the slotted eye.The somebody has invented a kind of setscrew [application number: CN200720081117], after mainly solving present setscrew and installing steady inadequately with and installation process in conical head bolt and then screw the problem that nut rotates together.The utility model is made of expansion sleeve, conical head bolt, packing ring, nut, and described expansion sleeve endoporus is tapered, and the head cross section of described conical head bolt is quadrilateral or Hexagon.

Though such scheme has improved the performance of setscrew to a certain extent, still there is technological deficiency: 1, complicated integral structure, use very loaded down with trivial detailsly, be unfavorable for applying.2, mechanical strength is not high, in use occurs easily damaging, and particularly breaks down easily in installation process, causes to be difficult to not mounted setscrew is dismantled.

Summary of the invention

The purpose of this utility model is at the problems referred to above, provides a kind of simple in structure, easy operating, the novel setscrew that mechanical strength is high.

For achieving the above object, the utility model has adopted following technical proposal: this novel setscrew, the body that comprises column, end at body has been attacked screw thread, the other end has several expansion pieces that is split to form by body end, above-mentioned expansion piece circumferentially is trapped among together and inner and body is connected as a single entity, it is characterized in that, this fastening piece also comprises a plug, described body center has the through hole that can insert above-mentioned plug, one end of described plug is tapered, and the other end has forced section, the external diameter of plug and through hole internal diameter adapt and when plug inserts through hole the plug end can the roof pressure expansion piece and the outer end of above-mentioned expansion piece is outwards strutted.

After body inserted parts to be fixed, plug is inserted by through hole, because the inner that the front end of plug can the roof pressure expansion piece, thereby the outer end of expansion piece is strutted, be fixed up firmly.

In above-mentioned novel setscrew, the inboard of described expansion piece has stepped shape breach and each above-mentioned stepped shape breach and surrounds with through hole and connect and interior big outer little step-shaped hole.By this structure can make expansion piece to strut angle bigger, further improve the fastness that connects.

In above-mentioned novel setscrew, the end of described body is provided with some bulge loops that are positioned at the expansion piece outside, and described each bulge loop be arranged in parallel.Bulge loop is set further strengthens frictional force.

The expansion piece quantity here can be provided with as required, and in above-mentioned novel setscrew, described body end has two and is half-terete expansion piece.

In above-mentioned novel setscrew, described forced section is spherical.Can easily plug be squeezed into through hole by forced section.

Compared with prior art, the advantage of this novel setscrew is: 1, reasonable in design, simple in structure, and the mechanical strength height.2, owing to body just squeezed into plug after fixing realize expanding, when finding that because of the situation such as bad of constructing body need retighten, plug is not reached the last and can both be removed easily, has effectively improved the use flexibility.3, very easy to use, only need use to get final product as normal screws.

Description of drawings

Fig. 1 is the structural representation that the utility model provides.

Fig. 2 is the body structure schematic representation that the utility model provides.

Fig. 3 is the side-looking enlarged view that the utility model provides.

Fig. 4 is the user mode schematic representation that the utility model provides.

Among the figure, body 1, screw thread 11, expansion piece 12, stepped shape breach 12a, bulge loop 12b, through hole 13, step-shaped hole 14, plug 2, forced section 21.

Embodiment

Shown in Fig. 1～4, this novel setscrew comprises the body 1 of column, end at body 1 has been attacked screw thread 11, and the other end has several by the expansion piece 12 that body 1 end is split to form, and above-mentioned expansion piece 12 circumferentially is trapped among together and inner and body 1 is connected as a single entity.This fastening piece also comprises a plug 2, and body 1 center has the through hole 13 that can insert above-mentioned plug 2, and an end of described plug 2 is tapered, and the other end has forced section 21, and forced section 21 is spherical.The external diameter of plug 2 and through hole 13 internal diameters adapt and when plug 2 inserts through holes 13 plug 2 ends can roof pressure expansion piece 12 and the outer end of above-mentioned expansion piece 12 is outwards strutted.More particularly, in the present embodiment, body 1 end has two and is half-terete expansion piece 12.

The inboard of expansion piece 12 has stepped shape breach 12a and each above-mentioned stepped shape breach 12a and surrounds with through hole 13 and connect and interior big outer little step-shaped hole 14.The end of body 1 is provided with some bulge loop 12b that are positioned at expansion piece 12 outsides, and described each bulge loop 12b be arranged in parallel.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Although this paper has used terms such as body 1, screw thread 11, expansion piece 12, stepped shape breach 12a, bulge loop 12b, through hole 13, step-shaped hole 14, plug 2, forced section 21 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.

Claims

1. novel setscrew, the body (1) that comprises column, attacked screw thread (11) at an end of body (1), the other end has several expansion pieces (12) that is split to form by body (1) end, above-mentioned expansion piece (12) circumferentially is trapped among together and inner and body (1) is connected as a single entity, it is characterized in that, this fastening piece also comprises a plug (2), described body (1) center has the through hole (13) that can insert above-mentioned plug (2), one end of described plug (2) is tapered, the other end has forced section (21), and the external diameter of plug (2) and through hole (13) internal diameter adapt.

2. novel setscrew according to claim 1, it is characterized in that the inboard of described expansion piece (12) has stepped shape breach (12a) and each above-mentioned stepped shape breach (12a) surrounds and through hole (13) connects and interior big outer little step-shaped hole (14).

3. novel setscrew according to claim 1 is characterized in that, the end of described body (1) is provided with some bulge loops (12b) that are positioned at expansion piece (12) outside, and described each bulge loop (12b) be arranged in parallel.

4. according to claim 1 or 2 or 3 described novel setscrews, it is characterized in that described body (1) end has two and is half-terete expansion piece (12).

5. according to claim 1 or 2 or 3 described novel setscrews, it is characterized in that described forced section (21) is spherical.