CN201866050U

CN201866050U - Full-thread bolt

Info

Publication number: CN201866050U
Application number: CN201020290358XU
Authority: CN
Inventors: 陆颂荫
Original assignee: Ningbo Donggang Fastener Manufacturing Co Ltd
Current assignee: Ningbo Donggang Fastener Manufacturing Co Ltd
Priority date: 2010-08-09
Filing date: 2010-08-09
Publication date: 2011-06-15
Anticipated expiration: 2020-08-09

Abstract

The utility model discloses a full-thread bolt which comprises a bolt head (1) and a screw rod (2), wherein the bolt head (1) and the screw rod (2) are connected into a whole, the screw rod (2) has full thread, a through hole (3) runs through the centers of the bolt head (1) and the screw rod (2) along the axial direction, the bolt head (1) is provided with a pentagonal counter bore (4), and the pentagonal counter bore (4) is communicated with the through hole (3). The full-thread bolt is hollow instead of solid, and during manufacturing and processing, material can be saved and cost can be reduced. In addition, the bolt head (1) adopts the specification of internal pentagon instead of the specifications of internal hexagon, internal octagon and internal duodecagon in the prior art, and when the bolt is assembled or disassembled by a wrench, slipping is not easy to happen.

Description

Screw bolt

Technical field

The utility model relates to a kind of bolt, particularly a kind of screw bolt.

Background technique

Screw bolt generally is made up of bolt head, screw rod, and screw portion is a Full Thread FT.Screw bolt on the market all is solid, and promptly the screw rod of Full Thread FT screw thread and bolt head all are solid, and the use material is more, manufacture cost is higher.The bolt of the Full Thread FT interior angle counterbore specification of prior art is generally even number of sides shape.Interior angle countersunk bolts commonly used has specifications such as interior six, eight, 12 jiaos.Because the interior arm of angle number of bolt head is many more, approach circle more, when then using the internal corner bolt of spanner to carry out dismounting, be easy to generate skidding.

The model utility content

The technical problems to be solved in the utility model is, overcomes above deficiency, and a kind of screw bolt that is not easy to skid, can save material, reduces manufacture cost is provided.

In order to address the above problem, the technical solution of the utility model is: a kind of screw bolt, comprise bolt head and screw rod, described bolt head and screw rod are connected in one, described screw portion is a Full Thread FT, the center of described bolt head and screw rod is prolonged and axially is penetrated with through hole, and described bolt head is provided with five jiaos of counterbores, and described five jiaos of counterbores and described through hole connect.

After adopting above technological scheme, the utility model screw bolt compared with prior art has the following advantages: the bolt head of the utility model screw bolt and the center of screw rod are prolonged and axially are penetrated with through hole, that is to say that the utility model screw bolt is hollow, rather than solid.This kind design when making screw bolt, has been saved the use material, has been reduced manufacture cost.Bolt head of the present utility model is provided with five jiaos of counterbores, just interior five angle gauge lattice, rather than interior six, eight, the 12 angle gauge lattice of prior art.Because the limit number of bolt head interior angle is many more, approach circle more, and five arm of angle shapes are lacked than the limit number of interior six, eight, 12 arm of angle shapes, then five jiaos limit than six, eight, the length on bihexagonal limit is longer, the area of contact of five corner bolts and corresponding spanner will increase then, therefore, to the screw bolt dismounting time, be not easy to occur skidding.

In sum, the utility model compared with prior art has the advantage that is not easy to skid, can save material, reduces manufacture cost.

Description of drawings

Fig. 1 is the plan view of screw bolt;

Fig. 2 is the sectional drawing of screw bolt along E-E place among Fig. 1;

Fig. 3 is the left view of screw bolt bolt;

Fig. 4 is the right elevation of screw bolt bolt.

Shown in the figure: 1, bolt head, 2, screw rod, 3, through hole, 4, five jiaos of counterbores.

Embodiment

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

Shown in Fig. 1 to 4, the utility model screw bolt, comprise bolt head 1 and screw rod 2, described bolt head 1 and screw rod 2 are connected in one, described screw rod 2 parts are Full Thread FT, the center of described bolt head 1 and screw rod 2 is prolonged and axially is penetrated with through hole 3, and described bolt head 1 is provided with five jiaos of counterbores 4, and described five jiaos of counterbores 4 connect with described through hole 3.Above-mentioned five jiaos are interior pentagon.

Claims

1. screw bolt, comprise bolt head (1) and screw rod (2), described bolt head (1) and screw rod (2) are connected in one, it is characterized in that: described screw rod (2) part is Full Thread FT, the center of described bolt head (1) and screw rod (2) is prolonged and axially is penetrated with through hole (3), described bolt head (1) is provided with five jiaos of counterbores (4), and described five jiaos of counterbores (4) connect with described through hole (3).