CN102392849A - Fastening component - Google Patents

Abstract

The invention discloses a fastening component, which consists of a bolt and a nut, wherein the bolt comprises a bolt head, a screw and a threaded body; a central through hole is opened on the nut along an axis; one end of the through hole is processed into an internal hexagon while the other end thereof is arranged as fine threads which can be matched with the threaded body; coarse threads are arranged on the external surface of the nut. In the fastening component disclosed by the invention, the coarse threads are arranged on the external surface of the nut; the screwing contacting face of the screw threads is large, and is fastened to the contacting face of a matter well; when using, the nut is fastened into the matter through an internal hexagonal wrench; the bolt passing through another matter is tightly screwed with the nut, so the two matters can be locked by fastening in tensioning way.

Description

A kind of fastening piece

Technical field

The present invention relates to a kind of machanical fastener.

Background technique

At present, the screw on the market, bolt are main directly to join hexagon nut, this Placement, and it is no problem fully to use at the fastening position of clamping, if but use at the fastening position of tension formula, realize that promptly the tension formula locking of two articles then can't be used.

Summary of the invention

The object of the present invention is to provide a kind of fastening piece, can realize two lockings between object preferably, tightness is good.

Technological scheme of the present invention: a kind of fastening piece, comprise bolt, nut, said bolt comprises bolt head, screw rod and threaded body; Said nut has a central through bore along axis, and through hole one end is processed into interior hexagonal, and the other end is set to the fine thread that matches with threaded body, and the nut outer surface is set to coarse thread.

Nut outer surface of the present invention is a coarse thread; It is big that screw thread screws surface of contact, and itself and object surface of contact tightness are good, are fastened to nut in the object with inner hexagon spanner earlier in the time of use; Bolt is screwed with nut after passing another object then, thus the locking of the fastening realization two articles of tension formula.

Description of drawings

Fig. 1 is the structural representation of bolt of the present invention.

Fig. 2 is the structural representation of nut of the present invention.

Fig. 3 locks the schematic representation of two articles for the present invention.

Embodiment

Like Fig. 1,2, a kind of fastening piece comprises bolt 8, nut 1, and said bolt 8 comprises bolt head 7, screw rod 6 and threaded body 5, and bolt head 7 is a standard head plum blossom groove, and threaded body 5 is a fine thread; Said nut 1 has a central through bore along axis, and through hole one end is processed into interior hexagonal 4, and the other end is set to the fine thread 3 that matches with threaded body 5, and nut 1 outer surface is set to coarse thread 2.

Like Fig. 3, in the time of use, be fastened to nut 1 in the object A with inner hexagon spanner earlier, bolt 8 passes another object B then, and threaded body 5 is inserted in the nut 1, thereby turns the locking of the fastening realization two articles of bolt head 7 tension formulas.It is big that the coarse thread of nut 1 outer surface screws surface of contact, and itself and object surface of contact tightness are good.

Claims (1)

1. a fastening piece comprises bolt (8), nut (1), it is characterized in that, said bolt (8) comprises bolt head (7), screw rod (6) and threaded body (5); Said nut (1) has a central through bore along axis, and through hole one end is processed into interior hexagonal (4), and the other end is set to the fine thread (3) that matches with threaded body (5), and nut (1) outer surface is set to coarse thread (2).

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