CN203641237U

CN203641237U - Nut for bolt end head protection

Info

Publication number: CN203641237U
Application number: CN201320844331.4U
Authority: CN
Inventors: 魏征宇; 薛峰
Original assignee: Taiyuan Heavy Industry Co Ltd
Current assignee: Taiyuan Heavy Industry Co Ltd
Priority date: 2013-12-20
Filing date: 2013-12-20
Publication date: 2014-06-11
Anticipated expiration: 2023-12-20

Abstract

A nut for bolt end head protection relates to fasteners. With the utility model, the technical problem that a regular nut is used in existing forging tool and thus threads exposed on a bolt end can easily be damaged is solved. The nut is hexahedron-shaped, wherein a threaded hole coordinated with the bolt is processed in the center, length of the threaded hole is 1.5 to 2 times the nominal diameter of the threads, a tool withdrawal groove is disposed between the threaded hole and the nut bottom and a chamfer is disposed on the upper end of the threaded hole. The nut in the utility model is used in the forging tools in a very wicked operating environment. The nut has the advantages that the treads on the bolt end are prevented effectively from being damaged, fastening is convenient and reliable and service life is long.

Description

A kind of nut that can fender bolt termination

Technical field

The utility model relates to fastening piece, is specifically related to a kind of nut that can fender bolt termination, is specially adapted to the very severe forging tools of working environment, and the helical thread portion that can expose the bolt end of forging tools is protected, and it is not damaged.

Background technique

The working environment of forging press is very severe: high temperature, HI high impact, powder (ash) dirt are large, the forging scale that can drop in forging process.The fastening piece that the forging tools of forging press uses, adopts plain nut and bolton conventionally, and the helical thread portion that expose bolt end often can be damaged, causes nut to dismantle, and affects the conventional maintenance of equipment.

Model utility content

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of nut that can fender bolt termination is provided, and solves existing forging tools and adopts plain nut, and the screw thread that expose bolt end often can impaired technical problem.

The utility model is achieved through the following technical solutions:

A kind of nut that can fender bolt termination, it is characterized in that: described nut is hexahedron, its center is processed with the tapped hole coordinating with bolt, the length of described tapped hole is 1.5～2 times of screw thread nominal diameter, between described tapped hole and nut bottom, be tool withdrawal groove, the upper end of described tapped hole is chamfering.

The seamed edge of described nut all has chamfering.

The utility model compared with prior art, due to by the plain nut transformation of the way for profile is the nut shape of hexahedron, center thread mill drilling, can prevent that bolt end from surprisingly being smashed by dust burn into.Because the length of tapped hole is 1.5～2 times of screw thread nominal diameter, can facilitate, normal and bolton.

The utility model is for the very severe forging tools of working environment, and the screw thread with effective protection bolt end is not damaged, fastening convenience, reliable, the advantage of long service life.

Accompanying drawing explanation

Fig. 1 is structural drawing of the present utility model (plan view);

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is the application schematic diagram of the utility model on forging tools (cutter anvil).

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Embodiment

As shown in Figure 1, 2, a kind of nut 1 that can fender bolt termination is hexahedron, its center is processed with the tapped hole 1-1 coordinating with bolt, the length of described tapped hole 1-1 is 1.5～2 times of screw thread nominal diameter, between described tapped hole 1-1 and nut bottom 1-2, be the tool withdrawal groove 1-3 that technique needs, the upper end of described tapped hole 1-1 is chamfering 1-1-1, is convenient to be screwed into bolt.

The seamed edge of described nut 1 all has chamfering 1-4.

The material of nut 1 is chosen and (can be used more greatly alloyed steel if stressed according to operating mode; If water or wet environment can be used stainless steel).

Application examples of the present utility model:

As shown in Figure 3, a kind of forging tools-cutter anvil, comprising: blade 3 and hammering block 4, and fixing employing nut 1 and the bolt 2 of blade 3 and hammering block 4 form, and blade 3 is arranged in the middle of 4 liang of flange 4-1 of hammering block, and bolt 2 is through the hole of blade 3 and hammering block 4, tightens with nut 1.

Hammering block 4 is pressed on (being fixed on) worktable 6 by pressing plate 7, and processing T type groove on worktable 6 is installed T-shape head bolt 5 in the middle of T-shaped groove, and T-shape head bolt 5 is through pressing plate 7 intermediate holes, T-shape head bolt 5 upper end mounting nuts 1.

Claims

One kind can fender bolt termination nut, it is characterized in that: described nut (1) is hexahedron, its center is processed with the tapped hole (1-1) coordinating with bolt, the length of described tapped hole (1-1) is 1.5～2 times of screw thread nominal diameter, between described tapped hole (1-1) and nut bottom (1-2), be tool withdrawal groove (1-3), the upper end of described tapped hole (1-1) is chamfering (1-1-1).
2. nut that can fender bolt termination according to claim 1, is characterized in that: the seamed edge of described nut (1) all has chamfering (1-4).