CN2367820Y - Expansion fastener - Google Patents
Expansion fastener Download PDFInfo
- Publication number
- CN2367820Y CN2367820Y CN 98205846 CN98205846U CN2367820Y CN 2367820 Y CN2367820 Y CN 2367820Y CN 98205846 CN98205846 CN 98205846 CN 98205846 U CN98205846 U CN 98205846U CN 2367820 Y CN2367820 Y CN 2367820Y
- Authority
- CN
- China
- Prior art keywords
- expansion cylinder
- nut
- screw
- screw rod
- expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model relates to an expansion fastener, which is composed of an expansion cylinder, a vellicating screw rod, and a screw cap. A traditional structure that the screw rod is exposed is changed. The expansion cylinder is sheathed by a frustum-shaped screw cap and is arranged inside a mounting hole, and then is penetrated into the screw cap by the vellicating screw rod to be in screw connection and match. Thus, the expansion cylinder, the screw cap, and the mounting hole are realized to be expanded, tightly clamped, and fixed. Such a structure has the advantages of convenient assembly and disassembly and beautiful appearance. A protruded part is unable to be remained outside the mounting hole after disassembly particularly. Cleaning is simple and easy.
Description
The utility model relates to the technical field of spiral fastener.
Traditional setscrew is made of expansion cylinder, expansive screw, nut, put into mounting hole after expansion cylinder is placed in expansive screw, tighten up screw rod with nut again, utilize the crack extruding spreading of the wealthy end of expansive screw with expansion cylinder, make expansive screw in mounting hole with expansion cylinder and wall tensioning, realize fastening.This fastening structure is solid and reliable, but also has unsatisfactory defective: 1. after fastening piece was installed, expansive screw can expose outside one and cut greatly, and it is attractive in appearance that influence is installed; 2. when setscrew is removed, lay down nut after, expansive screw still is anchored in the mounting hole, and part is outstanding to be exposed, must screw rod be bended or mounting hole is enlarged and screw rod could be taken out with instrument, sometimes even will outstanding expansive screw be reamed with welding machine, the dismounting cleaning is trouble very.
The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of installation, dismounting all very convenient, and does not leave over the expansion fastener of exposed parts after the dismounting.
The purpose of this utility model is achieved by the following technical solution: expansion fastener is made of the twitch screw rod and the nut that have the expansion cylinder that cracks, band hexagonal spiral shell head, specialization is that nut is the little taper type of the big end of an end, the diameter of big end is greater than the external diameter of expansion cylinder, the diameter of small end is less than the internal diameter of expansion cylinder, and the nut small end is socketed in the expansion cylinder and together is put in the mounting hole during installation; Have in the nut and twitch the inner screw channel that screw rod cooperates.What cooperate with the twitch screw rod in the nut further, can be the screw that connects.
Below in conjunction with drawings and Examples structure of the present utility model and advantage are described further.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is embodiment two a scheme of installation.
Referring to Fig. 1, present embodiment is made of twitch screw rod 2, nut 1, expansion cylinder 3 three parts, twitches screw rod 2 and has hexagonal spiral shell head 22; Nut 1 is the little taper type of the big end of an end, and the diameter of small end is less than the internal diameter of expansion cylinder 3, and then greater than the external diameter of expansion cylinder 3, small end has inner screw channel 11 to Outside diameter, cooperates with outside thread 21 spirals on twitching screw rod 2; Be evenly equipped with three on the expansion cylinder 3 and crack 31.
During installation (referring to Fig. 2), crack end and nut 1 socket with expansion cylinder 3, together put into mounting hole (figure does not draw) then, will twitch screw rod 2 again and pass behind the fixation from the screw 12 (or inner screw channel 11) that connects in mounting hole inserts, passes expansion cylinder 3 and nut 1 and spin.By rotation hexagonal spiral shell head 22, along with cooperating, outside thread 21 screws 12 (or inner screw channel 11) continuous and in the nut 1 of twitching screw rod 2 screw, expansion cylinder 3 is pressed in nut 1 and twitches between the screw rod 2, finally make expansion cylinder 3 be depressed into three 31 one-tenth " eight " font spreadings that crack, and be fixedly clamped with the mounting hole wall.And when dismounting need only counterrotating be twitched screw rod 2, and until breaking away from nut 1 fully, extraction gets final product.When twitching after screw rod 2 takes out, nut 1 and expansion cylinder 3 still are hidden in the mounting hole, but do not have any expose or outstanding.
In sum, the utlity model has obvious advantage:
1. fastening convenience, solid and reliable is installed;
2. dismounting is also convenient, and installing hole can not leave over protrusion, clears up convenient and simple;
3. dress or tear open and all can keep attractive in appearance has significantly reduced follow-up arrangement work.
Claims (2)
1, a kind of expansion fastener, crack by the having expansion cylinder (3) of (31), the twitch screw rod (2) and nut (1) formation of band hexagonal spiral shell head (22), it is characterized in that: nut (1) is the little taper type of the big end of an end, the diameter of big end is greater than the external diameter of expansion cylinder (3), the diameter of small end is less than the internal diameter of expansion cylinder (3), and nut during installation (1) small end is socketed in the expansion cylinder (3) and together is put in the mounting hole; Have in the nut (1) and twitch the inner screw channel (11) that screw rod (2) cooperates.
2, expansion fastener according to claim 1 is characterized in that in the nut (1) that with what twitch that screw rod (2) cooperates be the screw (12) of perforation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98205846 CN2367820Y (en) | 1998-06-09 | 1998-06-09 | Expansion fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98205846 CN2367820Y (en) | 1998-06-09 | 1998-06-09 | Expansion fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2367820Y true CN2367820Y (en) | 2000-03-08 |
Family
ID=33962147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98205846 Expired - Fee Related CN2367820Y (en) | 1998-06-09 | 1998-06-09 | Expansion fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2367820Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639735A (en) * | 2013-12-09 | 2014-03-19 | 强胜精密机械(苏州)有限公司 | Expansion type clamping device |
| CN109826807A (en) * | 2019-01-25 | 2019-05-31 | 武汉新宜搏科技有限公司 | A kind of blower |
-
1998
- 1998-06-09 CN CN 98205846 patent/CN2367820Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639735A (en) * | 2013-12-09 | 2014-03-19 | 强胜精密机械(苏州)有限公司 | Expansion type clamping device |
| CN109826807A (en) * | 2019-01-25 | 2019-05-31 | 武汉新宜搏科技有限公司 | A kind of blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |