CN202991794U

CN202991794U - Combined screw

Info

Publication number: CN202991794U
Application number: CN 201220756484
Authority: CN
Inventors: 钟金民
Original assignee: TIANSHUI HAOTIAN FASTENER CO Ltd
Current assignee: TIANSHUI HAOTIAN FASTENER CO Ltd
Priority date: 2012-12-22
Filing date: 2012-12-22
Publication date: 2013-06-12
Anticipated expiration: 2022-12-22

Abstract

The utility model discloses a combined screw. A screw and a washer are combined together to serve as a single piece for installation and detachment, and the washer can play roles of a flat pad and an elastic pad. The combined screw consists of the screw and the washer, wherein the rod part of the screw comprises a threaded part and a polished rod part, the polished rod part is positioned between the head and the threaded part of the screw, and the rod diameter of the polished rod part is smaller than that of the threaded part; and the washer is in a tile shape and is sleeved on the polished rod part to avoid dropping.

Description

A kind of screw assemblies

Technical field

The utility model relates to a kind of firm, relates in particular to a kind of screw assemblies.

Background technique

In the prior art, screw, packing ring are to install as single-piece respectively, first packing ring are placed on rigging position, penetrate again screw-driving, just can complete the assembling of fastening piece, time-consuming, how screw and washer combinations being installed as a single-piece together, is the problem that needs consideration; Simultaneously, how by changing washer-shaped, adopting an abnormity pad just can reach the using effect that plain cushion adds the bullet pad, is also the problem that need to consider.

The model utility content

Technical problem to be solved in the utility model is to provide a kind of screw assemblies, and screw and washer combinations are in the same place, and can be used as single-piece installation and removal; Packing ring can play the effect that plain cushion adds the bullet pad simultaneously.

The technical solution of the utility model is as follows: a kind of screw assemblies, formed by screw and packing ring, the bar section of screw comprises helical thread portion and polished rod part, this polished rod partly is between the head and helical thread portion of screw, the bar footpath of this polished rod part is less than the bar footpath of helical thread portion, packing ring is the tile shape, and this gasket sleeve can not come off in described polished rod part.

Preferably, round boss is established in described helical thread portion and polished rod part connecting part; Four jiaos of little convex closures that are provided with four symmetries below described packing ring.

The beneficial effects of the utility model are: with screw with screw and washer combinations are become a kind of fastening piece of special construction together, screw assemblies only need adopt an instrument, an assembling action, just can complete assembling or dismounting, be fit to the automatic line assembling, improve nearly 20 times as single-piece manual operations manufacturing efficiency respectively than screw, packing ring, effectively reduced cost; By changing the geometrical shape of packing ring, adopt an abnormity pad just can reach the using effect that plain cushion adds the bullet pad, reduced the use number of packages of packing ring.

Description of drawings

Fig. 1 is screw assemblies overall structure schematic diagram; Fig. 2 is the structural representation of packing ring;

The drawing explanation

In figure: the 1-screw; The 2-packing ring; 3-bar section; The 4-helical thread portion; The 5-head; 6-polished rod part; The little convex closure of 7-.

Embodiment

Below in conjunction with description of drawings embodiment of the present utility model, as shown in Figure 1 and Figure 2, the bar footpath of polished rod part 6 is less than the bar footpath of helical thread portion 4, screw 1 makes packing ring 2 be locked in the polished rod part 6 of screw 1 by cold hobbing after penetrating packing ring 2, packing ring 2 rotates flexibly, but can not come off, so only need adopt an instrument, an assembling action, just can complete assembling or the dismounting of screw assemblies, convenient and swift; Packing ring 2 is the tile shape, four jiaos of little convex closures that are provided with four symmetries below it, tighten that screw assemblies reaches after the torsional moment of setting that packing ring 2 is subjected to the extruding of screw head 5 and the generation compressive stres that deforms plays the effect that prevents that screw 1 is loosening, the little convex closure of four symmetries has been strengthened this effect.

Claims

1. screw assemblies, formed by screw and packing ring, it is characterized in that, the bar section of screw comprises helical thread portion and polished rod part, this polished rod partly is between the head and helical thread portion of screw, the bar footpath of this polished rod part is less than the bar footpath of helical thread portion, and packing ring is the tile shape, and this gasket sleeve can not come off in described polished rod part.

2. screw assemblies according to claim 1, is characterized in that, round boss is established in described helical thread portion and polished rod part connecting part.

3. screw assemblies according to claim 1, is characterized in that, four jiaos of little convex closures that are provided with four symmetries below described packing ring.