CN206111771U - Improvement type expansion bolts - Google Patents

Abstract

The utility model provides an improvement type expansion bolts, including screw rod, nut, packing ring, bloated cover and lock sleeve, the shape of screw rod is the cylinder, the upper end of screw rod is equipped with the screw thread, the nut is installed on the top of screw rod, the packing ring is installed to the below of nut, the below of screw rod is equipped with the tail bone, the cover that expands is installed to the tail bone top, the logical groove of a plurality of has been seted up to the lower extreme that overlaps that expands, the upper end of bloated cover is equipped with the lock sleeve, the periphery of lock sleeve is equipped with a plurality of fin, utilizes tail bone and bloated cooperation of overlapping, makes the afterbody radial expansion of the cover that expands, and when locking the wall, movable vane piece radial expansion is driven to the cone of bloated cover upper end, fin locking wall, and the effect is fastened in the enhancement, has guaranteed bolted connection's steadiness.

Description

A kind of modified form expansion bolt

【Technical field】

This utility model is related to the technical field of Hardware fitting, particularly a kind of modified form expansion bolt.

【Background technology】

At this stage, people can use expansion bolt when decorating house, installation water power, and setscrew is typically all It is made up of two parts, one is movable, a fixation, in the presence of external force, two part relative motions so that activity is solid The local of fixed part deforms, and volume becomes big, becomes also bigger than the internal diameter in hole, so as to produce coupling mechanism force, what is used During, body of wall internal drilling aperture is often big than bolt hole, side of the common expansion bolt using single screwing type expansion fastening Method, single fastening structure easily cause the unstable phenomenon of installation thing, easily come off during use, therefore propose a kind of improvement Type expansion bolt.

【Utility model content】

The purpose of this utility model is exactly to solve the problems of the prior art, it is proposed that a kind of modified form expansion bolt, profit With caudal vertebra and the cooperation of expansion set, the afterbody radial dilatation of expansion set is made, while locking wall, the cone of expansion set upper end drives fin Radial dilatation, fin locking wall, strengthens fastening effect, it is ensured that bolted steadiness.

For achieving the above object, the utility model proposes a kind of modified form expansion bolt, including screw rod, nut, packing ring, Expansion set and lock sleeve, the screw rod are shaped as cylinder, and the upper end of the screw rod is provided with screw thread, the top of the screw rod is installed There is nut, packing ring is installed below the nut, caudal vertebra is provided with below the screw rod, is provided with above the caudal vertebra swollen Set, the lower end of the expansion set offer several grooves, and the upper end of the expansion set is provided with lock sleeve, and the periphery of the lock sleeve sets There are several fins.

Preferably, the expansion set is hollow cylindrical, the upper end of the expansion set is provided with cone, the cone upper surface Outer diameter length of the external diameter less than lower surface, the lock sleeve are engaged with cone.

Preferably, the lock sleeve also includes installation set, the installation set is shaped as annular, the installation set Outer diameter length is not more than the outer diameter length of expansion set.

Preferably, the cross sectional shape of the fin is arc, the fin is circularly and evenly distributed, the fin it is interior Wall is provided with inclined plane.

The beneficial effects of the utility model：This utility model is matched somebody with somebody by screw rod, nut, packing ring, expansion set and lock sleeve etc. Close, using caudal vertebra and the cooperation of expansion set, make the afterbody radial dilatation of expansion set, while locking wall, the cone of expansion set upper end is driven Dynamic fin radial dilatation, fin locking wall, strengthens fastening effect, it is ensured that bolted steadiness.

Feature of the present utility model and advantage will combine accompanying drawing by embodiment and be described in detail.

【Description of the drawings】

Fig. 1 is a kind of structural representation of modified form expansion bolt of this utility model；

Fig. 2 is a kind of operating diagram of modified form expansion bolt of this utility model；

Fig. 3 is a kind of structural representation of the lock sleeve of modified form expansion bolt of this utility model；

Fig. 4 is a kind of structural representation of the expansion set of modified form expansion bolt of this utility model.

In figure：1- screw rods, 2- nuts, 3- packing rings, 4- expansion sets, 5- lock sleeves, 11- caudal vertebras, 41- grooves, 42- cones, 51- Installation set, 52- fins, 521- inclined planes.

【Specific embodiment】

Refering to a kind of modified form expansion bolt of Fig. 1 to Fig. 4 this utility model, including screw rod 1, nut 2, packing ring 3, expansion set 4 With lock sleeve 5, the screw rod 1 is shaped as cylinder, and the upper end of the screw rod 1 is provided with screw thread, the top of the screw rod 1 is installed The lower section for having nut 2, the nut 2 is provided with packing ring 3, and the lower section of the screw rod 1 is provided with caudal vertebra 11, pacifies above the caudal vertebra 11 Equipped with expansion set 4, the lower end of the expansion set 4 offers several grooves 41, and the upper end of the expansion set 4 is provided with lock sleeve 5, the lock The periphery of tight set 5 is provided with several fins 52.The expansion set 4 is hollow cylindrical, and the upper end of the expansion set 4 is provided with cone 42, Outer diameter length of the external diameter of 42 upper surface of the cone less than lower surface, the lock sleeve 5 are engaged with cone 42.The locking Set 5 also includes installation set 51, and the installation set 51 is shaped as annular, and the outer diameter length of the installation set 51 is not more than expansion set 4 outer diameter length.The cross sectional shape of the fin 52 is arc, and the fin 52 is circularly and evenly distributed, the fin 52 Inwall is provided with inclined plane 521.

Utility model works process：

Bolt in the course of the work, during installation, is put into connected workpiece by a kind of modified form expansion bolt of this utility model Hole in, rotate nut 2 with spanner, screw rod 1 produces relative motion with nut 2, and screw rod 1 rises, and expansion set 4 is provided with groove 41, Caudal vertebra 11 is embedded in the afterbody of expansion set 4, orders about the afterbody radial dilatation of expansion set 4, and cone 42 is embedded in lock sleeve 5, drives fin 52 Radial dilatation, the end of fin 52 are embedded in body of wall, with the effect for strengthening fastening, can avoid the loosening easily of bolt, Ensure bolted steadiness, during dismounting, need to only reversely rotate nut 2, screw rod 1 is separated with expansion set 4, then takes out 3 He of pad Lock sleeve 5, you can bolt is taken out.

Above-described embodiment be to explanation of the present utility model, be not to restriction of the present utility model, it is any new to this practicality Scheme after type simple transformation belongs to protection domain of the present utility model.

Claims (4)

1. a kind of modified form expansion bolt, it is characterised in that：Including screw rod (1), nut (2), packing ring (3), expansion set (4) and locking Set (5), the screw rod (1) are shaped as cylinder, and the upper end of the screw rod (1) is provided with screw thread, the top peace of the screw rod (1) Equipped with nut (2), packing ring (3) is installed below the nut (2), below the screw rod (1), is provided with caudal vertebra (11), it is described Expansion set (4) is installed above caudal vertebra (11), the lower end of the expansion set (4) offers several grooves (41), the expansion set (4) Upper end is provided with lock sleeve (5), and the periphery of the lock sleeve (5) is provided with several fins (52).

2. a kind of modified form expansion bolt as claimed in claim 1, it is characterised in that：The expansion set (4) is hollow cylindrical, The upper end of the expansion set (4) is provided with cone (42), and the external diameter of cone (42) upper surface is less than the outer diameter length of lower surface, institute State lock sleeve (5) to be engaged with cone (42).

3. a kind of modified form expansion bolt as claimed in claim 1, it is characterised in that：The lock sleeve (5) also includes installing Set (51), the installation set (51) are shaped as annular, and the outer diameter length of the installation set (51) is not more than the outer of expansion set (4) Electrical path length.

4. a kind of modified form expansion bolt as claimed in claim 1, it is characterised in that：The cross sectional shape of the fin (52) is Arc, the fin (52) are circularly and evenly distributed, and the inwall of the fin (52) is provided with inclined plane (521).