CN202579581U

CN202579581U - Fastening element

Info

Publication number: CN202579581U
Application number: CN 201220118141
Authority: CN
Inventors: 严芳琴
Original assignee: NINGBO YONGHONG FASTENER MANUFACTURING CO LTD
Current assignee: NINGBO YONGHONG FASTENER MANUFACTURING CO LTD
Priority date: 2012-03-27
Filing date: 2012-03-27
Publication date: 2012-12-05
Anticipated expiration: 2022-03-27

Abstract

The utility model relates to a fastening element. By aiming at the problems that an accessory screw cap of the existing fastening element can easily get loose, and further, the use is influenced, the utility model provides the fastening element, which comprises a screw bolt and a screw cap, wherein the screw bolt is a hexagon half threaded bolt, the screw bolt comprises a screw bolt head and a screw rod, external screw thread grooves are arranged in the outer wall of the screw rod, the screw thread grooves occupy 30 to 50 percent of the total length of the screw rod, the screw thread grooves and the screw cap are hexagon prisms, internal screw thread grooves are arranged along the center axis and are matched with the external screw thread grooves, the fastening element also comprises a gasket, the bottom surface of the gasket is provided with a circular ring, the outer edge of the circular ring extends upwards for forming a protection wall, and the inner diameter of the circular ring sheet is matched with the outer diameter of the screw rod. The safety of the screw cap in the use process is effectively improved, and the matching stability of the screw bolt and the screw cap is enhanced.

Description

Fastening piece

Technical field

The utility model relates to a kind of fastening piece.

Background technique

Fastening piece the most commonly used aborning at present generally is bolt, nut counterpart, usually in use, earlier bolt is penetrated screw, cooperates with the fixture card with in the centre with bolt head through nut, thereby plays fixing effect.But, owing to nut leaks outside in environment,, causing nut loosening easily, and then cause nut and bolt dropout so constantly clash into along with in using, the stability when influencing fixedly also possibly cause production accident when serious.

Summary of the invention

The utility model is loosening easily to present fastening piece accessory nut, and then the problem of influence use, and a kind of fastening piece is provided, and said fastening piece comprises: bolt, nut; Said bolt is a hexagonal partial thread bolt, and said bolt comprises bolt head, screw rod, offers the outside thread groove on the said screw rod outer wall; Said thread groove accounts for 30% ~ 50% of screw rod length overall, and the said nut of said thread groove is a hexagonal prismoid, offers the internal thread groove along axis; Said internal thread groove and outside thread groove coupling also include pad, and said pad bottom surface is an annulus; The annulus outside extends upward, and forms protective bulkhead, the internal diameter of said circular ring plate and screw rod external diameter coupling.

Further, also further to disclose the bottom thickness of said pad be 1mm ~ 2mm to the utility model.

Because the utility model set up this member of pad, and be the shape that has protective bulkhead, overall with gasket design; Whole pad is a bottom and has the bowl-shape of annulus; So, when fixedly, at first bolt is inserted in the screw; And then pad screwed in the screw rod, and further nut is screwed in the screw rod.At this moment; Nut gets into the pad protective bulkhead and forms in the space, thereby nut is protected, even in use clashed into; Can not cause the nut rotation yet; Avoided because nut constantly rotates cause loosening, nut, the bolt having avoided causing are thus threaded off, and have improved Security and stability when using.

Because the increase of pad makes and has had certain clearance between nut and the bolt that if this gap is excessive, then fixation stability property own is lower, is 1mm ~ 2mm so the invention also discloses the bottom thickness of said pad.Thereby guarantee that nut screws in stable bond between back and the screw rod, does not influence bolt, the normal stable installation property of nut.

In sum, effectively raise nut Security in use after adopting technological scheme disclosed in the utility model, increased the stability that bolt, nut cooperate.

Description of drawings

Fig. 1 is the fastening piece explosive view;

Fig. 2 is a fastening piece user mode reference drawing.

Wherein:

1-bolt 2-nut 3-pad

11-bolt head 12-screw rod 10-outside thread groove

20-internal thread groove 31-protective bulkhead.

Embodiment

Below in conjunction with accompanying drawing and embodiment, further illustrate the utility model, should understand following embodiment only be used to the utility model is described and be not used in the restriction the utility model scope.Need to prove; Describe below the word " preceding " that uses, " back ", " left side ", " right side ", " on " and D score refer to the direction among the width of cloth figure, word " interior " and " outward " refer to respectively towards or away from the direction of specific features geometrical center.

Embodiment 1

As shown in Figure 1, a kind of fastening piece comprises bolt 1, nut 2, and said bolt 1 is a hexagonal partial thread bolt; Said bolt 1 comprises bolt head 11, screw rod 12, offers outside thread groove 10 on said screw rod 12 outer walls, and said thread groove 10 accounts for 30% ~ 50% of screw rod 12 length overalls; Said thread groove 10 said nuts 2 are hexagonal prismoid, offer internal thread groove 20 along axis, said internal thread groove 20 and outside thread groove 10 couplings; Also include pad 3, said pad bottom surface is an annulus, and the annulus outside extends upward; Form protective bulkhead 31, the internal diameter of said circular ring plate and screw rod 12 external diameters coupling.

During use, as shown in Figure 2, bolt 1 is inserted in the screw; And pad 3 is screwed in the screw rod 12, after pad 3 is screwed, again nut 2 is screwed in; This moment, nut 2 was positioned at the protective bulkhead 31 of pad 3, thereby nut 2 has been played protective action, prevented it and was in use outwarded winding.

Embodiment 2

In the present embodiment; Member among the logical embodiment 1 of other members is identical, is 1mm ~ 2mm with the thickness setting of pad 3 especially in the present embodiment just, thereby has guaranteed the surface of contact of nut 2 with screw rod 12; After guaranteeing that it installs, the stability of nut 2 and screw rod 12 itself.

The disclosed technological means of the present invention program is not limited only to the disclosed technological means of above-mentioned technological means, also comprises the technological scheme of being made up of above technical characteristics combination in any.

Claims

1. fastening piece, it is characterized in that said fastening piece comprises: bolt, nut, said bolt are hexagonal partial thread bolt; Said bolt comprises bolt head, screw rod, offers the outside thread groove on the said screw rod outer wall, and said thread groove accounts for 30% ~ 50% of screw rod length overall; Said nut is a hexagonal prismoid, is that center of rotation offers the internal thread groove with the axis, said internal thread groove and outside thread groove coupling; Said fastening piece also includes pad, and said pad bottom surface is an annulus, and the annulus outside extends upward; Form protective bulkhead, the internal diameter of said circular ring plate and screw rod external diameter coupling.

2. fastening piece as claimed in claim 1 is characterized in that: the bottom thickness of said pad is 1mm ~ 2mm.