CN2439561Y

CN2439561Y - Self-locking and dismountable type expending bolt

Info

Publication number: CN2439561Y
Application number: CN 00221774
Authority: CN
Inventors: 张绍喜; 周迎红
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-13
Filing date: 2000-09-13
Publication date: 2001-07-18
Anticipated expiration: 2010-09-13

Abstract

The utility model relates to a self-tightening and dismountable type expending screw bolt, which comprises a sleeve barrel and the screw bolt, wherein, the screw bolt is composed of a screw rod and a rod cap which is fixedly connected to the outer end. The self-tightening and dismountable type expending screw bolt is characterized in that the sleeve barrel is divided into three segments structurally comprising an empty sleeve of the front end, which is arranged on one side of the rod cap, a deformed sleeve which is arranged on the back part, and an internal thread sleeve which is matched with the screw rod on the other end. One upper circle of the deformed sleeve is provided with prismatic holes which are distributed uniformly. The self-tightening and dismountable type expending screw bolt has the advantages of firm installation, no loosening, dismountable screw bolts, and reusability.

Description

Self-tightening, detachable type EXPANSION ANCHOR BOLTS

The utility model relates to EXPANSION ANCHOR BOLTS.

EXPANSION ANCHOR BOLTS is widely used in All aspects of, brings great convenience to people's installation, mounting article.Employed EXPANSION ANCHOR BOLTS is by key, constitute with the nut of key screw-thread fit and the sleeve pipe that is linked in the key outside in advance in the prior art, forms to extending out the impact section of stretching at the head of key, and the front end of sleeve pipe is an opening sleeve.There is following deficiency in concrete the application:

1, because sleeve pipe is to be linked on the key in advance, as long as insert within the walls, just because non-dismountable and can't change, key and sleeve pipe are the one-to-one relationship of strictness.

2, for the bolt of implementing to install, give it up no matter be, still nonconforming the needs changed on the size, all because non-dismountable, bolt can only be stayed original position, this makes and leaves undesirable root on metope, influence outward appearance, also brings great trouble to reinstalling on the origin-location, also causes waste simultaneously.

3, because this bolt is the friction that relies on the sleeve pipe expansion on external diameter formation sleeve pipe and between the walls, reach fixing purpose.Thereby, when implementing to install,, then may cause bolt integral body to deviate from as pine in the body of wall or chance encounter wall seam.Equally,, usually make the hole that gets out bigger, like this, also can cause bolt integral body to deviate from than what require because the electric drill moving is big.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and a kind of self-tightening, detachable type EXPANSION ANCHOR BOLTS of installing firmly, can arbitrarily dismantle is provided.

The purpose of this utility model is achieved through the following technical solutions:

The utility model is made of sleeve and bolt, and described bolt is made of the pole cap that screw mandrel and its outer end connect firmly.

Structural feature of the present utility model is that described sleeve structurally is divided into three sections, comprise the empty cover of the front end that is positioned at pole cap one side, be positioned at the distortion cover at rear portion and the inner screw sheath that the other end cooperates with screw mandrel, described distortion cover is to offer uniform prismatic hole thereon a week.

Compared with the prior art, the utlity model has following advantage:

1, the utility model is in installation process, is by screwing bolt, and the sleeve with its screw-thread fit is pushed to stem cap end, distortion cover until its rear portion swells owing to being extruded, and the position of its protuberance is entrapped in the body of wall firmly, self-tightening, do not get loose, solid and reliable.

2, the setting in prismatic hole in the utility model makes installation more laborsaving.In the extrusion process, the joint potential energy between the adjacent prismatic hole swells reliably.

3, the bolt in the utility model is even after implementing installation, also can directly withdraw from from sleeve very easily by reverse turn.Just because of this, the screw mandrel in the utility model can be changed at any time, to be fit to different needs; Can reuse, to economize on resources in a large number; Do not have undesirable root on the metope of discarded back.

4, the bolt in the utility model can be selected length according to the thickness of workpiece, and purposes is very extensive.

5, the utility model is simple in structure, and is easy for installation, and for situation in the installed position wall, and the size of boring is not strict with when installing.

6, the utility model manufacturing process is simple, cost of production is low.

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model bolt arrangement schematic representation.

Fig. 3 is the utility model sleeve structure schematic representation.

Fig. 4 is the utility model scheme of installation.

Fig. 5 is another example structure schematic representation of the utility model bolt.

By the following examples, in conjunction with the accompanying drawings the utility model is further described.

Embodiment:

As shown in Figure 1, present embodiment comprises sleeve and bolt.

As shown in Figure 2, bolt is made of the pole cap 2 that screw mandrel 1 and its outer end connect firmly, and wherein, pole cap 2 is to establish for ease of swivel bolt.For this reason, also required hanger type can be made in the outer end of bolt, as shown in Figure 5.

As shown in Figure 3, sleeve structurally is divided into three sections, comprises the empty cover 3 of the front end that is positioned at pole cap 2 one sides, is positioned at the distortion cover 4 at rear portion and the inner screw sheath 5 that the other end cooperates with screw mandrel 1, and distortion cover 4 is to offer uniform prismatic hole 6 thereon a week.The setting in prismatic hole 6 makes installation more laborsaving.In the extrusion process, the joint potential energy between the adjacent prismatic hole swells reliably.The processing of sleeve can be adopted sleeve blank is passed through heat or cold stamping shaping or grinding forming, directly reserves out a hole, or holes and open silk, afterwards, cuts out the prismatic hole in the relevant position with the taper mouth cutting machine and gets final product.

In concrete the enforcement, pad is established spring washer 7 and pad 8 between pole cap 2 and sleeve, and sleeve is butted on pad 8 with the empty cover 3 of its front end.

As shown in Figure 4, in the installation process, at first should open mounting hole 9 at installed position, the internal diameter of mounting hole 9 is as the criterion can insert sleeve, and the length of the degree of depth of mounting hole 9 and screw mandrel 1 is corresponding.Sleeve is inserted in the mounting hole 9, and swivel bolt makes sleeve with its screw-thread fit to the distolateral extruding of pole cap, swells owing to being extruded until its rear portion distortion cover, and ridge is entrapped in the body of wall firmly, realizes fixing.

Claims

1, a kind of self-tightening, detachable type EXPANSION ANCHOR BOLTS, comprise sleeve and bolt, described bolt is made of the pole cap (2) that screw mandrel (1) and its outer end connect firmly, it is characterized in that described sleeve structurally is divided into three sections, comprise the inner screw sheath (5) that the empty cover of front end (3) that is positioned at pole cap (2) one sides, the distortion cover (4) that is positioned at the rear portion and the other end cooperate with screw mandrel (1), described distortion cover (4) is to offer uniform prismatic hole (6) thereon a week.

2, self-tightening according to claim 1, detachable type EXPANSION ANCHOR BOLTS is characterized in that, pad is established spring washer (7) and pad (8) between pole cap (2) and sleeve, and sleeve is butted on pad (8) with the empty cover of its front end (3).