CN2400620Y

CN2400620Y - Expansion nut

Info

Publication number: CN2400620Y
Application number: CN 99225084
Authority: CN
Inventors: 赵灿国; 刘旭
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-13
Filing date: 1999-09-13
Publication date: 2000-10-11
Anticipated expiration: 2009-09-13

Abstract

The utility model relates to an expansion nut, which comprises an expansion body and the nut. The special point of the expansion nut is that the nut which can be displaced along an axial direction is arranged inside the expansion body, of which the outer wall is provided with a stopping mechanism. The connecting surface of the expansion body and the nut is a wedge surface. The expansion nut is characterized in that the entire expansion nut is buried inside a basal body beforehand when the expansion nut is used. Damages of screw threads can be avoided, and the appearance is tidy and beautiful. The nut is displaced towards a direction of tensile force elimination, and an expansion member is contracted towards a shaft center. The expansion nut can be disassembled conveniently. Because the entire expansion nut is buried beforehand, even if the expansion nut is not disassembled, a beautiful appearance is not affected, and hidden dangers of safety are not left behind. The expansion nut is suitable for road surfaces, walls, and situations that need disassembling and washing frequently.

Description

Expanding nut

The utility model relates to a kind of coupling.

Existing EXPANSION ANCHOR BOLTS is that expansion piece is set on screw rod, EXPANSION ANCHOR BOLTS is half pre-buried state during use, be that the screw flight end exposes coupled outside, so it exists screw flight easily to be damaged and corrosion reaches shortcoming attractive in appearance inadequately, and also have potential safety hazard.In addition, the structures shape of EXPANSION ANCHOR BOLTS it after use, be difficult to be removed, usually need to destroy the matrix of inserting EXPANSION ANCHOR BOLTS.

The purpose of this utility model is to provide a kind of simple in structure, safe in utilization, easy-off expanding nut.

The purpose of this utility model is achieved in that a kind of expanding nut, comprises expander and nut, and its special way is to be provided with in outer wall is provided with the expander of stop mechanism can be along the nut of its axial displacement, and the mating face of expander and nut is a wedge surface.Described expander is 2～4 expanding stents that directional post surrounds by the edge circumferentially evenly distributes at regular intervals and an end is connected by link, be provided with the groove nut that can match in the expanding stent with directional post, the inwall of directional post is a wedge surface with the groove bottom of the groove nut that engages, and the outer wall of directional post is provided with stop mechanism.Described expander is the expansion tube that has prismatic cavity, has cylindrical void vertically in the edges and corners of expansion tube, is provided with the angle nut identical with prismatic cavity shape in the expansion tube, and both mating faces are wedge surface, and the outer wall of expansion tube is provided with stop mechanism.Described stop mechanism is locking strip or stop tooth or the stop protrusion that is arranged on the expander outer wall.End at expander is a retaining eaves in the bottom is provided with.

Characteristics of the present utility model are:

All be embedded in advance in the matrix when 1, using, can avoid the screw thread damage and make the appearance neat appearance.

2, with the direction displacement of nut, and expander is shunk to the axle center, can be removed easily to the elimination tension force.Because all pre-buried, both just do not removed and do not affect the appearance yet and stay potential safety hazard.The occasion that is suitable for road surface, wall and the frequent dismounting of need.

3, simple in structure, reusable, save material, cost is low.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that the A-A of Fig. 1 is to cut-away view.

Be described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1 and Figure 2, expanding nut is made up of expander (1) and nut (2).Expander in the present embodiment is an expanding stent, it circumferentially reaches the link (4) that links to each other with directional post by 90 ° of directional posts (3) uniformly at intervals by four edges and constitutes, link has the sheet metal of dog for periphery, four dogs that are mutually 90 ° are welded on respectively on the outer wall on four directional post tops, the plate face of sheet metal is provided with the pilot hole corresponding with nut bore, so that the bolt shank that enters in the expanding stent can be connected on the nut exactly.The inwall of directional post is a wedge surface, and outer wall is a concave surface, promptly forms two locking strips (6) on outer wall along its length.The groove nut of the nut that is provided with in the expanding stent for matching with directional post, the face that each groove bottom of groove nut promptly engages with the directional post inwall is a wedge surface, retaining eaves (7) in the bottom of directional post is provided with.

Another embodiment of the present utility model is: expander employing six or quadrangular expandable cavity pipe, be provided with six or the tetragonal nut that match in the pipe, and both mating faces are wedge surface.The edges and corners of pipe have the hole vertically, and the tube wall of opening turns up the formation locking strip.

Installation method of the present utility model is identical with existing EXPANSION ANCHOR BOLTS, promptly goes up by the preliminary dimension punching at matrix (8) earlier, expanding nut is put in the manhole, and be that available bolt (5) carries out fastening after again fastener (9) being put.When carrying out fastening rotation, because expanding stent peripheral hardware locking strip, so expanding stent do not rotate, and nut can only move up under the restriction of directional post vertically, because the mating face of directional post and groove nut is a wedge surface, on move past and directional post progressively outwards expanded fix.When needing to remove, fastener can be dismantled, screw in the expanding nut with former fixed-use bolt, and keep certain surplus, touch the bolt upper end with hand hammer, nut in the expanding nut is moved down under impact force action, eliminate tension force, and it is mobile simultaneously to drive expanding stent, expanding stent shrinks to the axle center under the effect of hole wall and upper end connecting plate, whole expanding nut can separate with fixing base, thereby it is taken out from the hole.

Claims

1, a kind of expanding nut comprises expander and nut, and it is characterized in that being provided with in outer wall is provided with the expander of stop mechanism can be along the nut of its axial displacement, and the mating face of expander and nut is a wedge surface.

2, expanding nut according to claim 1, it is characterized in that: described expander is 2～4 expanding stents that directional post surrounds by the edge circumferentially evenly distributes at regular intervals and an end is connected by link, be provided with the groove nut that can match in the expanding stent with directional post, the inwall of directional post is a wedge surface with the groove bottom of the groove nut that engages, and the outer wall of directional post is provided with stop mechanism.

3, expanding nut according to claim 1, it is characterized in that: described expander is the expansion tube that has prismatic cavity, edges and corners at expansion tube have cylindrical void vertically, be provided with the angle nut identical in the expansion tube with prismatic cavity shape, both mating faces are wedge surface, and the outer wall of expansion tube is provided with stop mechanism.

4, according to claim 1,2,3 described expanding nut, it is characterized in that: described stop mechanism is locking strip or stop tooth or the stop protrusion that is arranged on the expander outer wall.

5, according to claim 1,2,3 described expanding nut, it is characterized in that: the end at expander is a retaining eaves in the bottom is provided with.