CN2192757Y

CN2192757Y - Anti-skid expansive bolt with internal nut

Info

Publication number: CN2192757Y
Application number: CN 94220590
Authority: CN
Inventors: 曹文
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-09
Filing date: 1994-09-09
Publication date: 1995-03-22
Anticipated expiration: 2004-09-09

Abstract

The utility model discloses an anti-skid expansion screw bolt with an internal screw nut. The utility model has the structure that the outside of the screw rod whose one end is provided with a cap is sheathed with an expansion sleeve, and one end of the screw rod, which extends out of the screw rod, is provided with a screw nut in a matching way. The utility model is characterized in that a guide groove is opened on the expansion sleeve, the conic screw nut is a butterfly nut with ears, the ears are clamped in the guide groove, when the screw rod is screwed, the phenomenon of the idling rotation and sliding of the ordinary expansive screw bolt, screw rod and screw nut in the expansion sleeve can not occur, the using efficiency of the expansion screw bolt is improved, in addition, after the components are fastened by using the expansion screw bolt with the internal screw nut structure, the outside of the components has no redundant screw rod, the whole screw bolt is concealed in a screw bolt hole, so the effect of neat external appearance without occupying the peripheral space of the components is achieved.

Description

Anti-skid expansive bolt with internal nut

The utility model belongs to hardware products, is specifically related to a kind of improvement of EXPANSION ANCHOR BOLTS.

The structure of existing EXPANSION ANCHOR BOLTS, generally take conical screw suit expansion set, screw rod one end fitting gasket and the nut that exposes expansion set, in the using process, twist nut, screw rod is vertically moved in expansion set,, thereby reach the purpose of secure component by the expansion set of the outer dress of screw rod the other end cone structure swelling.The defective of this structure is that along with the continuation of fastening process, screw rod is outer gradually to be moved, to fastening end of a period, will there be long one section screw rod to expose in the parts outside, not only influence attractive in appearance, and occupied connected piece space on every side, or bring operation inconvenience, otherwise causing to use is obstructed.

The purpose of this utility model is by changing the structure of screw rod and nut, after making that parts are fastened, it is that bolt all is imbedded in the bolt hole that the parts outside does not appear screw rod, another purpose of the present utility model is effectively to solve to screw in the process, the problem of relative idle running between screw rod, nut and the expansion set.

For achieving the above object, the utility model has adopted following technological scheme, the screw rod of one end band cap, expansion set of outside suit, screw rod stretches out the equipped tapered cup nut in end of expansion set, it is characterized in that expansion set axially offers at least more than one openings lead groove near an end of nut, and tapered cup nut is the wing nut of band ear, after the assembling, its ear is stuck in the guiding groove of expansion set.

As further improvement of the utility model, the guiding groove root is camber line shape, connects spalling to avoid expansion set.

During use the utility model EXPANSION ANCHOR BOLTS band tapered cup nut one end that assembles is inserted in the good bolt hole of prior brill inwardly, when twisting screw rod, nut in the hole is stuck in the guiding groove of expansion set because of its ear, so must outside the axial direction of guiding groove and screw rod, move, expansion set reaches the purpose fastening with hole wall from the guiding groove distending thereupon.

Technique effect of the present utility model shows: after one, fastening, screw rod does not expose; Idle running phenomenon when two, cooperating the guiding groove structure to solve effectively that screw rod turns by wing nut, thus the utilization efficiency of EXPANSION ANCHOR BOLTS improved.

Description of drawings:

Fig. 1 is the utility model assembling schematic representation.

1--screw rod 2--expansion set 3--wing nut

4--packing ring 5--openings lead groove 6--ear

Fig. 2 is the wing nut schematic representation.

Fig. 3 is an arc cap screw rod schematic representation.

In conjunction with the accompanying drawings the utility model embodiment is described specifically, on screw rod, is inserted in packing ring 4 and then suit expansion set 2 earlier, offer 3 openings lead grooves on the expansion set, the root of groove is camber line shape, equipped at last wing nut 3, nut adopts the monaural wing nut, and spiro rod cap is a hexagonal shaped.

Claims

1, a kind of anti-slip expantion bolt for internal nut, structure is: the screw rod of an end band cap, expansion set of outside suit, screw rod stretches out the equipped tapered cup nut in end of expansion set, it is characterized in that: expansion set is axially offered at least more than one openings lead groove near an end of nut, tapered cup nut is the wing nut of band ear, and after the assembling, its ear is stuck in the guiding groove of expansion set.

2, anti-slip expantion bolt for internal nut as claimed in claim 1 is characterized in that the guiding groove root on the expansion set is camber line shape.