CN201588851U

CN201588851U - Expansion bolt

Info

Publication number: CN201588851U
Application number: CN2009202435411U
Authority: CN
Inventors: 唐远贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2010-09-22
Anticipated expiration: 2019-11-27

Abstract

The utility model discloses an expansion bolt, during the installation of which an expansion tube can be firmly installed instead of rotating. The expansion bolt is characterized in that at least two annular bulges (3) are formed on the outer wall of an expansion sleeve (2) at the expansion end, longitudinal fillets (5) are arranged on the outer wall of the expansion sleeve at the non-expansion end, the annular bulges formed at the expansion end can be in contact with a wall hole to enhance the installation firmness at the same time, and the fillets arranged on the outer wall of the expansion sleeve can prevent the expansion sleeve from rotating in a mounting hole.

Description

Setscrew

Technical field

The utility model relates to the fastening part of using in the cinclides, particularly a kind of setscrew.

Background technique

The setscrew that uses generally is made up of nut, conehead screw rod and expansion tube at present, and the shortcoming of this setscrew is the back to be installed be difficult for taking out from mounting hole, cause waste, and the screw rod exposed parts is many, and influence is installed attractive in appearance; For solving above-mentioned existing problems, a kind of setscrew of being made up of screw and expansion tube has also appearred on the market, this kind setscrew when mounted, can turn screw the inflating end of expansion tube is strutted swelling in mounting hole, screw can be withdrawed from a segment distance after the installation, directly be pulled outwardly screw then expansion tube taken out in mounting hole, still, the shortcoming that this kind setscrew exists be install inadequately firmly, easy being screwed into and rotating when expansion tube is installed with screw.

The model utility content

Expansion tube was difficult for rotating, installing firm setscrew when the purpose of this utility model was a kind of the installation is provided.

The utility model is realized by the following technical solutions: a kind of setscrew, comprise screw and expansion sleeve, the sleeve outer wall of expansion sleeve inflating end is provided with at least two annular projections, the sleeve outer wall of the unexpansive end of expansion sleeve is provided with lengthways of rod, and the port of expansion sleeve is provided with turned welt.

Further scheme is that described annular projection is provided with two.

Adopt this expansion of structure screw, when screw is screwed into expansion sleeve, will be from the inside to surface the dilating expansion end, many annular projections having of inflating end can contacts the fastness of increase installation simultaneously with wall hole like this; It is little that expansion sleeve uses the back distortion simultaneously, is easy to take out in mounting hole; The rib that is provided with on the sleeve outer wall can prevent that expansion sleeve from rotating in mounting hole; The turned welt that expansion sleeve has can prevent that expansion sleeve from falling into mounting hole very dark or that connect.

Below in conjunction with drawings and Examples the utility model is further set forth.Protection domain of the present utility model includes but are not limited to accompanying drawing and the disclosed content of embodiment.

Description of drawings

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

Fig. 2 be Figure 1A-A to sectional view.

Embodiment

Below in conjunction with accompanying drawing the utility model is further elaborated.

Extremely shown in Figure 2 as Fig. 1, this setscrew comprises screw 1 and expansion sleeve 2, be processed with the internal thread 7 that the spiral shell tooth with screw 1 is complementary on the interior thorax entire body of expansion sleeve 2, one end of expansion sleeve 2 is inflating ends, inflating end transversely be processed with two annular projections 3, and in the vertical inflating end is processed three groovings 4, the other end of expansion sleeve 2 is unexpansive end, the sleeve outer wall of unexpansive end is provided with four lengthways of rod 5, and is provided with turned welt 6 in the port of unexpansive end.

Claims

1. setscrew, include screw (1) and expansion sleeve (2), it is characterized in that: the sleeve outer wall of expansion sleeve (2) inflating end is provided with at least two annular projections (3), the sleeve outer wall of the unexpansive end of expansion sleeve is provided with lengthways of rod (5), and the port of expansion sleeve is provided with turned welt (6).