CN204610511U

CN204610511U - Eccentric nut assembly

Info

Publication number: CN204610511U
Application number: CN201420816860.8U
Authority: CN
Inventors: 刘琨; 高登科; 郭晓宇; 董涛涛
Original assignee: Changchun Railway Vehicles Co Ltd
Current assignee: CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2014-12-22
Filing date: 2014-12-22
Publication date: 2015-09-02
Anticipated expiration: 2024-12-22

Abstract

A kind of eccentric nut assembly, it is characterized in that: comprise base and nut, base is made up of the cylinder of upper bands convex edge, has shoulder hole in base, and base upper surface has the well conveniently screwed; Nut is made up of the cylinder of upper bands boss, has eccentric opening in nut, and nut upper surface has the well conveniently screwed.The utility model is by embedding in one of them workpiece hole by base, again eccentric nut is inserted in base, while eccentric nut rotates in the base, automatic eccentric adjustment is apart from size, until coordinate with bolt, then nut is carried out and bolt is normally fastenedly connected, base by nut and bolted fastening defeat be embedded in the pre-subdrilling of workpiece hole in, reach fastening object.

Description

Eccentric nut assembly

Technical field

The utility model relates to a kind of eccentric nut assembly connected.

Background technique

Between nut and bolt with the use of, by mutual frictional force, realize the object that self-locking is fastening.In the design production process of rail truck, a large amount of unit bolt nut, for the installation of vehicle arrangement.For ensureing the installation accurately and reliably connected, normal employing organizes fastening piece more.When practical set, to occur between two pieces that boring can not be mated completely in advance, causing bolt and nut cannot normal mounting.Its way adopted is that after being pulled down by readily removable part, with reamer to eccentric opening reaming, it is right then to organize, and ensures that bolt can pass, and increases large washer carry out fastening by General fasteners.This method group is complicated to process, inefficiency; The required precision of workpiece hole relative size is high, and parts machining cost is high.

Model utility content

The purpose of this utility model is to provide a kind of eccentric nut assembly, while realizing reliable connection, reduces workpiece and assembling precision requirement, increases work efficiency; Avoid this type of off-dimension product again to process, reduce cost of production.

For achieving the above object, the utility model provides a kind of eccentric nut assembly, it is characterized in that: comprise base and nut, and base is made up of the cylinder of upper bands convex edge, has shoulder hole in base, and base upper surface has the well conveniently screwed; Nut is made up of the cylinder of upper bands boss, has eccentric opening in nut, and nut upper surface has the well conveniently screwed.

The utility model is by embedding in one of them workpiece hole by base, again eccentric nut is inserted in base, while eccentric nut rotates in the base, automatic eccentric adjustment is apart from size, until coordinate with bolt, then nut is carried out and bolt is normally fastenedly connected, base by nut and bolted fastening defeat be embedded in the pre-subdrilling of workpiece hole in, reach fastening object.

Accompanying drawing explanation

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

Fig. 2 is the structural representation of base;

Fig. 3 is the plan view of Fig. 2;

Fig. 4 is the left view of Fig. 3;

Fig. 5 is the structural representation of nut;

Fig. 6 is the plan view of Fig. 5;

Fig. 7 is the left view of Fig. 6;

Fig. 8 is the utility model scheme of installation;

Fig. 9 is the sectional view along A-A line in Fig. 8.

Embodiment

With reference to accompanying drawing 1-7, the utility model comprises base 1 and nut 2, and base is made up of the cylinder 102 of upper bands convex edge 101, has shoulder hole 103 in base, and base upper surface has the well 104 conveniently screwed; Nut is made up of the cylinder 202 of upper bands boss 201, has eccentric opening 204 in nut, and the lower surface of nut columnar part has the well 203 conveniently screwed.

With reference to accompanying drawing 8-9, during use, in advance the bore dia size of top board 4 and nut are formed base 1 column diameter identical.During installation, base 1 embeds in top board 4 hole, rotating nut 2, owing to being eccentric structure between base 1 and nut 2 and interior threaded hole, nut rotates in the base, automatic eccentric adjustment is apart from size, bolt 5 coordinates with nut 2 through base plate 3, and when being fastenedly connected, nut is normally connected with bolt, base by nut and bolted fastening defeat be embedded in the pre-subdrilling of top board 4 hole in, reach fastening object.

Claims

1. an eccentric nut assembly, is characterized in that: comprise base and nut, and base is made up of the cylinder of upper bands convex edge, has shoulder hole in base, and base upper surface has the well conveniently screwed; Nut is made up of the cylinder of upper bands boss, has eccentric opening in nut, and nut upper surface has the well conveniently screwed.