CN2594521Y

CN2594521Y - Anti-loosing security screw bolt pair

Info

Publication number: CN2594521Y
Application number: CN 03201292
Authority: CN
Inventors: 江海林
Original assignee: Haili Standard Part Co ltd Zhejiang
Current assignee: Haili Standard Part Co ltd Zhejiang
Priority date: 2003-01-21
Filing date: 2003-01-21
Publication date: 2003-12-24
Anticipated expiration: 2013-01-21

Abstract

The utility model discloses an anti-loosing security screw bolt pair, which is composed of a screw bolt, a screw nut and a spring washer. The head of the screw bolt and the screw nut are all in the shape of a truncated cone body. The end with major diameter of the cone body is a polygonal cylinder equally divided in odd number, and each edge of the polygonal cylinder is provided with a flange. As to a detachable anti-loosing security screw bolt pair, the clamping plane of the screw nut is not provided with an inner annular groove; as to an undetachable anti-loosing security screw bolt pair, the clamping plane of the screw nut is provided with an inner annular groove. The anti-loosing security screw bolt pair is loaded into a workpiece, and is tightly screwed, which causes the elastic washer to be deformed and pressed flat until the requirement of fasten connection is achieved. Two sharp hook ends of the elastic washer are respectively tightly compressed on surfaces by the pressed workpiece and the screw nut. Because the utility model has anti-loosing and anti-theft functions, as well as can be detached under definite condition, the utility model can be widely used for electric power, railways and highways.

Description

The loosing and theft preventing bolt auxiliary connection

Affiliated technical field

But the utility model relates to a kind of both anti-loose anti-thefts, again can dismountable under given conditions a kind of loosing and theft preventing bolt auxiliary connection.

Background technique

The utility model is to " integrated type the anti-loose anti-theft nut " (patent No.: shortcoming 91224563.8): 1) complex structure, cost height; 2) boundary dimension is big, mounting point restricted and a kind of simple in structure, the new structure that cost is low of design.

The purpose of this utility model provides a kind of loosing and theft preventing bolt auxiliary connection ", it has detachable and non-dismountable antitheft two kinds of forms.

Summary of the invention

The purpose of this utility model is achieved in that

The loosing and theft preventing bolt auxiliary connection is made up of bolt, nut and elastic washer.It is a truncated cone that bolt head and nut profile are, and the bigger diameter end of cone is branch polygonal cylinders such as odd number, has a flange on each limit of polygonal cylinder.

Elastic washer is that ordinary elasticity packing ring opening two ends have the opposite sharp hook of both direction respectively.

For detachable loosing and theft preventing bolt auxiliary connection nut, the nut seal face is a plane.

For non-dismountable loosing and theft preventing bolt auxiliary connection nut, an interior circular groove bigger slightly than washer outer diameter, that the depth ratio gasket thickness is slightly little is arranged on the nut seal face.

When the utility model uses the loosing and theft preventing bolt auxiliary connection packed into workpiece and screwing makes the elastic washer distortion, flattens, until reaching fastening connection requirement.The elastic deformation force of packing ring plays nut and prevents that nature from becoming flexible effect.Two sharp hook ends of elastic washer are pressed into respectively on workpiece and the nut seal face, increase dismounting torsion, play certain anti-theft effect; The unique profile of nuts and bolt head must be used corresponding special tool during dismounting, plays the double anti-theft effect.

The utlity model has following characteristics: 1) can under vibration and difference variation state, work; 2) the bolt head form can be used this patent profile, also available plain bolt; 3) can need select for use detachably with non-dismountable by the difference use.Therefore, mechanical field be can be widely used in, electric power, railway, bridge, highway etc. are particularly useful for.

Description of drawings

Below in conjunction with accompanying drawing and embodiment shown in the drawings, the utility model will be further described, but the content of model utility is not limited thereto.

Fig. 1 is the generalized section of facing of the utility model loosing and theft preventing bolt auxiliary connection.

Fig. 2 is the cross-sectional schematic of facing of the utility model loosing and theft preventing bolt auxiliary connection nut.

Fig. 3 looks schematic representation for the left side of the utility model loosing and theft preventing bolt auxiliary connection nut.

Fig. 4 is the utility model loosing and theft preventing bolt auxiliary connection nut schematic side view.

Fig. 5 is the schematic side view of the utility model single coil spring lock washer with tang ends.

Circular groove (4) bolt in (1) nut (2) elastic washer (3) nut among the figure

(5) workpiece

Embodiment

The structure of this loosing and theft preventing bolt auxiliary connection is made up of the bolt (4) that the special nut of profile (1), elastic washer (2) and head configuration are consistent with nut as shown in Figure 1.

Nut of the present utility model (1) is as Fig. 2, Fig. 3, shown in Figure 4, profile is a truncated cone, the bigger diameter end of cone is branch polygonal cylinders such as odd number, guarantee that special tool is fastening, non-slip when dismantling, on each limit of polygonal cylinder, have a flange, preventing the dismounting of general polygonal special tool, and increase nut strength.Because the design of nuts and bolt head configuration is unique, has realized anti-theft feature.

The utility model elastic washer (2) is a single coil spring lock washer with tang ends, as shown in Figure 5, at ordinary elasticity packing ring opening two ends the opposite sharp hook of both direction is arranged respectively.

For detachable loosing and theft preventing bolt auxiliary connection as shown in Figure 1, its used nut (1) does not have interior circular groove (3) as shown in Figure 2 on the clamping plane.Elastic washer (2) is little single coil spring lock washer with tang ends.The workpiece (5) of as shown in Figure 1 the loosing and theft preventing bolt auxiliary connection being packed into makes the elastic washer distortion, flattens, until reaching fastening connection requirement.The elastic deformation force of elastic washer (2) plays nut (1) and prevents the loosening effect of nature.Two little sharp hooks are pressed into workpiece (5) and nut seal face, play certain antitheft effect.In the time must dismantling under special circumstances, execute sizable power with special tool, make little sharp hook elastic washer external diameter become big, until damage, reach dismountable purpose.

For non-dismountable loosing and theft preventing bolt auxiliary connection as shown in Figure 1, its used nut (1) has one as shown in Figure 2 than elastic washer (2) external diameter is big slightly, depth ratio elastic washer thickness is slightly little interior circular groove (3) on clamping plane.Elastic washer (2) as shown in Figure 5, elastic washer is big sharp hook elastic washer.Fastening back elastic washer (2) two sharp hooks are pressed into workpiece (5) and nut 1 seal face respectively.When implementing dismounting, external diameter increased when interior circular groove (3) can stop elastic washer to be turned round, and made the vibration of nut return pine and artificially return pine and can not realize that adding to the nuts and bolt head has unique profile, plays the double anti-theft effect.

The utility model again can be detachable under given conditions owing to existing anti-loose anti-theft effect, therefore can be widely used on field or the not manageable fastened thing, guarantees the safety of fastened thing.

Claims

1, a kind of loosing and theft preventing bolt auxiliary connection, it is characterized in that forming by nut (1), elastic washer (2), bolt (4), nut (1) and bolt (4) head configuration are a truncated cone, the bigger diameter end of cone is branch polygonal cylinders such as odd number, have a flange on each limit of polygonal cylinder, elastic washer (2) is for there being the opposite sharp hook of both direction respectively at the opening two ends.Elastic washer (2) is positioned between nut (1) and the workpiece (5).

2, by the described loosing and theft preventing bolt auxiliary connection of claim 1, the seal face that it is characterized in that dismountable anti-loose anti-theft nut (1) is a plane, does not have interior circular groove.

3, by the described loosing and theft preventing bolt auxiliary connection of claim 1, it is characterized in that having on the seal face of non-removable anti-loose anti-theft nut (1) one bigger slightly than elastic washer (2) outside dimension, the interior circular groove (3) that depth ratio elastic washer (2) thickness is slightly little, elastic washer (2) are put into the circular groove (3) of nut (1).