CN105465127A - Two-stage expansion bolt - Google Patents
Two-stage expansion bolt Download PDFInfo
- Publication number
- CN105465127A CN105465127A CN201410460233.XA CN201410460233A CN105465127A CN 105465127 A CN105465127 A CN 105465127A CN 201410460233 A CN201410460233 A CN 201410460233A CN 105465127 A CN105465127 A CN 105465127A
- Authority
- CN
- China
- Prior art keywords
- bolt
- swollen cylinder
- expansion
- nut
- barrel
- 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.)
- Pending
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- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses a two-stage expansion bolt. The two-stage expansion bolt comprises a bolt body (1), a nut (2), a spring washer (3), a flat washer (4), an upper expansion barrel (5), a conical sleeve (6) and a lower expansion barrel (8). The two-stage expansion bolt is characterized in that the expansion bolt further comprises an outer sleeve (7); an external thread (11) is arranged on the upper portion of the bolt body (1); a tail cone (12) is arranged on the lower portion of the bolt body (1); two or more first notching grooves (51) are formed in the lower portion of upper expansion barrel (5); two or more second notching grooves (81) are formed in the lower portion of lower expansion barrel (8); the lower expansion barrel (8), the conical sleeve (6), the upper expansion barrel (5), the flat washer (4), the spring washer (3) and the nut (2) are installed on the bolt body (1) from bottom to top in sequence; the outer sleeve (7) is installed on the outer surface of the lower expansion barrel (8) in a sleeving mode. The two-stage expansion bolt is simple in structure, accurate in positioning, large in expanding force, safe, reliable, low in cost and long in service life.
Description
Technical field
The present invention relates to fastening piece, specifically twin-stage EXPANSION ANCHOR BOLTS.
Background technique
Existing EXPANSION ANCHOR BOLTS is made up of bolt, nut, spring washer, plain washer and single swollen cylinder, adopts the EXPANSION ANCHOR BOLTS of this structure, when mounted, not easily locates, and easily generation is crooked causes generation stress when stressed to be concentrated, dangerous; In recent years, also there is the twin-stage EXPANSION ANCHOR BOLTS be made up of bolt, nut, spring washer, plain washer, upper swollen cylinder, middle cone block, intermediate clapboard and lower swollen cylinder, the EXPANSION ANCHOR BOLTS of this structure, because lower swollen cylinder can produce axial displacement when expanding, this will cause swollen cylinder can not normal expansion, thus affect swelling effect, and sometimes produce loosening phenomenon, there is potential safety hazard.
Summary of the invention
Object of the present invention is just to provide that a kind of structure is simple, accurate positioning, expansive force is large, safe and reliable, cost is low, the twin-stage EXPANSION ANCHOR BOLTS of long service life.
For achieving the above object, the present invention includes bolt, nut, spring washer, plain washer, upper swollen cylinder, taper sheath and lower swollen cylinder, also comprise outer sleeve, outside thread is provided with on the top of described bolt, tail cone is provided with in the bottom of described bolt, the bottom of described swollen cylinder is provided with at least two undercut groove I, the bottom of described lower swollen cylinder is provided with at least two undercut groove II, described lower swollen cylinder, taper sheath, upper swollen cylinder, plain washer, spring washer and nut are loaded on bolt successively from the bottom to top, and described outer sleeve is set on the outer surface of lower swollen cylinder.
The present invention is owing to have employed the structure be made up of bolt, nut, spring washer, plain washer, upper swollen cylinder, taper sheath, lower swollen cylinder and outer sleeve, after adopting such structure, when fastening nut, just can guarantee that swollen cylinder promotes outer sleeve and upwards moves axially when expanding instantly, and then promotion taper sheath moves up, swollen cylinder is produced expand, thus produce the effect of twin-stage expansion.Structure of the present invention is simple, accurate positioning, and expansive force is large, and safe and reliable, cost is low, long service life.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the application schematic diagram of the present invention when producing twin-stage expansion effect.
Embodiment
See Fig. 1 to Fig. 2, the present invention includes bolt 1, nut 2, spring washer 3, plain washer 4, upper swollen cylinder 5, taper sheath 6 and lower swollen cylinder 8, also comprise outer sleeve 7, outside thread 11 is provided with on the top of described bolt 1, tail cone 12 is provided with in the bottom of described bolt 1, the bottom of described swollen cylinder 5 is provided with at least two undercut groove I51, the bottom of described lower swollen cylinder 8 is provided with at least two undercut groove II81, described lower swollen cylinder 8, taper sheath 6, upper swollen cylinder 5, plain washer 4, spring washer 3 and nut 2 are loaded on bolt 1 successively from the bottom to top, described outer sleeve 7 is set on the outer surface of lower swollen cylinder 8.
Claims (1)
1. twin-stage EXPANSION ANCHOR BOLTS, comprise bolt (1), nut (2), spring washer (3), plain washer (4), upper swollen cylinder (5), taper sheath (6) and lower swollen cylinder (8), it is characterized in that: also comprise outer sleeve (7), outside thread (11) is provided with on the top of described bolt (1), tail cone (12) is provided with in the bottom of described bolt (1), the bottom of described swollen cylinder (5) is provided with at least two undercut groove I(51), the bottom of described lower swollen cylinder (8) is provided with at least two undercut groove II(81), described lower swollen cylinder (8), taper sheath (6), upper swollen cylinder (5), plain washer (4), spring washer (3) and nut (2) are loaded on bolt (1) successively from the bottom to top, described outer sleeve (7) is set on the outer surface of lower swollen cylinder (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460233.XA CN105465127A (en) | 2014-09-11 | 2014-09-11 | Two-stage expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460233.XA CN105465127A (en) | 2014-09-11 | 2014-09-11 | Two-stage expansion bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105465127A true CN105465127A (en) | 2016-04-06 |
Family
ID=55603180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410460233.XA Pending CN105465127A (en) | 2014-09-11 | 2014-09-11 | Two-stage expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105465127A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640894A (en) * | 2016-12-19 | 2017-05-10 | 苏州市职业大学 | Internal tensioning lock screw |
| CN113802473A (en) * | 2020-06-17 | 2021-12-17 | 檀国大学校产学协力团 | Anchor rod comprising a plurality of expansion sleeves |
-
2014
- 2014-09-11 CN CN201410460233.XA patent/CN105465127A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640894A (en) * | 2016-12-19 | 2017-05-10 | 苏州市职业大学 | Internal tensioning lock screw |
| CN113802473A (en) * | 2020-06-17 | 2021-12-17 | 檀国大学校产学协力团 | Anchor rod comprising a plurality of expansion sleeves |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160406 |