CN2813970Y

CN2813970Y - Two-end expansion bolt

Info

Publication number: CN2813970Y
Application number: CN 200520028806
Authority: CN
Inventors: 郑东
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-23
Filing date: 2005-06-23
Publication date: 2006-09-06
Anticipated expiration: 2015-06-23

Abstract

The utility model relates to a two-end expansion bolt, which is characterized in that an expansion bolt rod is provided with a rear conical face corresponding to the rear end of an expansion sleeve pipe; an expansion inner pipe which is provided with the conical face is sheathed on the expansion bolt rod; a longitudinal opening is arranged on the pipe wall on the front end of the expansion inner pipe; a longitudinal opening is arranged on the pipe wall on the rear end of the expansion sleeve pipe. When the utility model is used, the front end of the expansion bolt is tightly expanded with a bolt hole, and then, the expansion inner pipe is sheathed on the expansion bolt; the screw nut is screwed to push the expansion inner pipe move forwards; the rear end of the expansion sleeve pipe is expanded by the conical face of the expansion inner pipe, simultaneously, the front end of the expansion inner pipe is expanded to be opened by the rear conical face on the bolt rod, and further, the rear end of the expansion sleeve pipe expands to achieve the effect that the rear end of the expansion sleeve pipe is tightly expanded with the bolt hole.

Description

The two ends EXPANSION ANCHOR BOLTS

Technical field

The utility model belongs to bolt.

Background technique

EXPANSION ANCHOR BOLTS is mainly used in fixed object on building wall, because the keyhole that bores on metope generally all is the aperture of the aperture of outer end greater than front end, therefore, the EXPANSION ANCHOR BOLTS that enters in the keyhole all is that front end is tight, the rear end pine, there is bigger the sphere of activities the rear end, causes the EXPANSION ANCHOR BOLTS front end loosening for a long time easily, even comes off.

Summary of the invention

The two ends EXPANSION ANCHOR BOLTS that provides a kind of two ends all to have expansion effect is provided the purpose of this utility model, to overcome the deficiencies in the prior art, the technical solution of the utility model as shown in drawings, it comprises an EXPANSION ANCHOR BOLTS bar, is enclosed within expansion breechblock bar outer expansion sleeve and nut, of the present utility model being characterised in that on the EXPANSION ANCHOR BOLTS bar has a rear cone with corresponding section, expansion sleeve rear end, on the EXPANSION ANCHOR BOLTS bar, be with in the expansion that has a conical surface and manage, on the pipe front end tube wall longitudinal opening is arranged in expanding, on the rear end tube wall of expansion sleeve longitudinal opening is arranged.Pipe was backed off from the EXPANSION ANCHOR BOLTS bar in the utility model will expand earlier when using, turn nut, the promotion expansion sleeve advances, make EXPANSION ANCHOR BOLTS front end and keyhole swelling, and then will expand interior pipe box on EXPANSION ANCHOR BOLTS, the conical surface of pipe enters the rear end of expansion sleeve in expanding, turn nut, pipe advances in promoting to expand, its conical surface continues to turn nut with expansion sleeve rear end distending, and the pipe front end is by the rear cone distending on the bolt shank in expanding, further make expansion sleeve rear end distending, reach effect with the swelling of keyhole rear end.The utility model makes bolt shank very firm at the hole internal fixation because bolt has former and later two expansion point in keyhole, the reach of screw rod fulcrum, compare with the rear end EXPANSION ANCHOR BOLTS, the suffered moment of screw rod reduces, and load-bearing increases, and has solved the problem that existing bolt front end is loosening even come off effectively.

Description of drawings

Accompanying drawing 1 is the utility model plan view;

Accompanying drawing 2 is pipe right elevation in expanding;

Accompanying drawing 3 is pipe plan view in expanding.

Legend: 1, expansion sleeve; 2, expansion sleeve rear end longitudinal opening; 3, rear cone on the EXPANSION ANCHOR BOLTS bar; 4, the pipe conical surface in the expansion; 5, pipe longitudinal opening in the expansion; 6, pipe in the expansion.

Embodiment

16 millimeters EXPANSION ANCHOR BOLTS of diameter.Long 130 millimeters of bolt shank, long 70 millimeters of screw thread.80 millimeters of expansion sleeve pipe ranges, 16 millimeters of expansion sleeve external diameters, 1 millimeter of thickness of pipe wall, long 35 millimeters of rear end longitudinal opening.Pipe range is 20 millimeters in expanding, 16 millimeters of external diameters, and 2 millimeters of wall thickness, longitudinal opening is long 14 millimeters on it.

Claims

1, two ends EXPANSION ANCHOR BOLTS, comprise an EXPANSION ANCHOR BOLTS bar, be enclosed within expansion breechblock bar outer expansion sleeve and nut, it is characterized in that on the EXPANSION ANCHOR BOLTS bar, a rear cone being arranged with corresponding section, expansion sleeve rear end, on the EXPANSION ANCHOR BOLTS bar, be with in the expansion that has a conical surface and manage, on the pipe front end tube wall longitudinal opening is arranged in expanding, on the rear end tube wall of expansion sleeve longitudinal opening is arranged.