CN201944082U

CN201944082U - Theft-proof bolt

Info

Publication number: CN201944082U
Application number: CN201120048154XU
Authority: CN
Inventors: 杨景晞
Original assignee: 杨景晞
Priority date: 2011-02-24
Filing date: 2011-02-24
Publication date: 2011-08-24
Anticipated expiration: 2021-02-24

Abstract

The utility model provides a theft-proof bolt, which comprises a bolt rod and a bolt cap. The bolt cap has a sunken groove at its end, while the sunk groove has a groove face. The groove edge extends to form a conical surface. Also including a neck provided between said bolt rod and bolt cap. The neck has a smaller section axial area as compared with that of the bolt rod and bolt cap. The theft-proof bolt is designed smartly and can be produced in a simple way therefore is easy to be marketed.

Description

A kind of anti-theft bolt

Technical field

The utility model belongs to technical field of fastening, and specifically, it relates to a kind of anti-theft bolt.

Background technique

Bolt is a kind of use fastening piece widely, is made of threaded screw rod and nut, is used for the two or more parts of fastening connection.In the ordinary course of things, people have dual needs fastening and dismounting to being used in same group of bolt on the product, but consider from antitheft angle sometimes, after people wish that bolt is in a single day fastening and get on, adopt conventional tool and the conventional method promptly can't demounting bolt, to reach antitheft purpose.

The model utility content

The utility model provides a kind of anti-theft bolt, can not dismantle with conventional instrument after it is fastening.

The technological scheme that its technical problem that solves the utility model adopts is:

A kind of anti-theft bolt, it comprises screw rod and nut, and described nut end face is provided with a deep gouge, and described deep gouge has a groove face, and its groove face edge extends to form a conical surface; It comprises that also a neck is located between described screw rod and the nut, and the axial cross section area of described neck is less than the axial cross section area of described screw rod and nut.

In one preferred embodiment, it comprises that also a boss is between described screw rod and described neck.

In one preferred embodiment, described nut, neck, boss and screw rod are formed in one.

In one preferred embodiment, the thickness of the joint of described neck and nut is made as 0.2mm～0.4mm.

In one preferred embodiment, described neck is a cylindrical body.

Anti-theft bolt of the present utility model is compared with the bolt in the background technique, has the following advantages:

1. the axial cross section area of neck is made as the axial cross section area less than screw rod and nut, and preset the thickness of the joint of described neck and nut, be the distance of the joint of neck and nut to the deep gouge conical surface, therefore guaranteed the join strength minimum of nut and neck joint, cause the joint fracture to continuing after the bolton to tighten, reached application target;

2. boss is located between screw rod and the neck, and therefore behind the bolton part, part surface will be close in the bottom surface of boss, strengthen fastening effect;

3. screw rod, boss, neck and nut are formed in one, and have simplified processing procedure, have improved manufacturing efficiency, help industrial applications;

4. the thickness of neck and nut joint is set, i.e. 0.2mm～0.4mm, correspondingly, torsion can twist off bolt in the scope of 5N～20N, does not need special technology can form this thickness, and is applicable to civil area.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the schematic perspective view of the anti-theft bolt of preferred embodiment.

Fig. 2 is the generalized section of the anti-theft bolt of preferred embodiment.

Fig. 3 is the enlarged diagram at A place among Fig. 2.

Description of reference numerals:

Screw rod-100; Nut-200; Deep gouge-210; Groove face-211; The conical surface-212; Neck-300; Boss-400.

Embodiment

See also Fig. 1 to Fig. 3, be the anti-theft bolt that preferred embodiment of the present utility model provided.

Anti-theft bolt comprises screw rod 100, nut 200, neck 300 and boss 400, wherein:

Described screw rod 100, boss 400, neck 300 and nut 200 are connected successively, and they are formed in one;

In the present embodiment, described boss 400 is a cambered surface boss, and its cambered surface is facing to the bottom surface of described nut 200;

The end face of described nut 200 offers a deep gouge 210, and groove face 211 edges of its deep gouge 210 stretch out and formed a conical surface 212;

In the present embodiment, described neck 300 is a cylindrical body, the one end connects the cambered surface of described cambered surface boss 400, the other end connects described nut 200, its axial cross section area design is all less than the axial cross section area of described screw rod 100 and nut 200, because described neck 300 flushes with the deep gouge groove face with the joint of nut 200, so the axial cross section area of neck 300 is made as the area greater than the groove face 211 of described deep gouge 210; Described neck 300 is not limited to cylindrical body, also can be designed to multiple shapes such as cone, cuboid; In the present embodiment, the thickness of the joint of described neck 300 and described nut 200 is designed to 0.2mm～0.4mm, please refer to Fig. 3, promptly the A place be made as 0.2mm～0.4mm apart from d, correspondingly, bolt is imposed the torsion of 5N～20N, can twist off bolt in described joint; Certainly, under different use occasions, the size by bolt designs, and just can obtain having the bolt of different moments of torsion, to produce the bolt with different size.

This anti-theft bolt in use, utilize instruments such as screw-driver that bolton is connected on the part earlier, after the connection between the part puts in place, if continue wrenching bolt, because the thickness of the joint between described neck 300 and the described nut 200 is made as 0.2mm～0.4mm, make that the join strength of described joint is minimum in bolt integral body, therefore will be after bolt strained in the fracture of described joint, this moment, cambered surface boss 400 and neck 300 were close to the product parts surface, adopted traditional instrument or conventional method can't dismantle this anti-theft bolt at all.

The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented according to this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model contains.

Claims

1. anti-theft bolt, it comprises screw rod and nut, and described nut end face is provided with a deep gouge, and described deep gouge has a groove face, and its groove face edge extends to form a conical surface; It is characterized in that: it comprises that also a neck is located between described screw rod and the nut, and the axial cross section area of described neck is less than the axial cross section area of described screw rod and nut.

2. a kind of anti-theft bolt according to claim 1 is characterized in that: it comprises that also a boss is between described screw rod and described neck.

3. a kind of anti-theft bolt according to claim 2 is characterized in that: described nut, neck, boss and screw rod are formed in one.

4. a kind of anti-theft bolt according to claim 1 is characterized in that: the thickness of the joint of described neck and nut is made as 0.2mm～0.4mm.

5. according to each described a kind of anti-theft bolt in the claim 1 to 4, it is characterized in that: described neck is a cylindrical body.