CN2622460Y - Tooth inlaid type loosening preventing screw - Google Patents

Abstract

The utility model discloses a tooth inlaid type loosening preventing screw comprising a bolt, a nut, and a spring gasket. The bolt is provided with a groove and the spring gasket is provided with a projection corresponding to the bolt groove. The spring gasket is coated on the bolt, and the bottom surface of the nut is provided with tooth inlaid type loosening preventing sleeve. The utility model has the advantages of simple structure, reasonable design, easy use, and good anti-theft performance which is free of special tools and can be broadly used in the component connecting of electric power, railway, road, bridge and outdoor public accommodation.

Description

A kind of castellated anti-theft screw

Technical field

The utility model relates to a kind of screw, especially the anti-theft screw of electric force pole tower, railway, highway, bridge and the fastening usefulness of outdoor communal facility.

Background technique

At present, what electric force pole tower, railway, highway, bridge and outdoor communal facility were used when member connects is normal screws, stolen phenomenon happens occasionally, cause great threat therefore for national wealth and people's life safety, though also there are some anti-theft screws to occur, but the method for mostly taking to change the nut profile realizes, need use special tool during dismounting, and is both uneconomical also inconvenient.

Summary of the invention

The purpose of this utility model provides a kind of simple in structure, easy to use, castellated anti-theft screw with anti-theft feature.

The purpose of this utility model is achieved in that this screw is made up of bolt, nut, spring washer, and is fluted on the bolt, has on the spring washer and the corresponding projection of bolt upper groove, and spring washer is enclosed within on the bolt, and there is castellated locking trough the nut bottom surface.

The utility model has the advantages that: simple in structure reasonable in design, easy to use, do not need special tool, have good theftproof performance simultaneously, can when connecting, use the member of electric power, railway, highway, bridge and outdoor communal facility widely.

Description of drawings

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is a spring washer structural drawing of the present utility model

1. bolts among the figure, 2. nut, 3. spring washer, 4. castellated locking trough, 5. groove, 6. projection.

Embodiment

The groove 5 that V-arrangement is arranged on the threaded stem of bolt 1, projection 6 with threaded stem upper groove 5 corresponding V-arrangements is arranged on spring washer 3 inwalls, there are six castellated locking troughs 4 bottom surface of nut 2, earlier bolt 1 is inserted member, again the projection 6 of the V-arrangement of spring washer 3 is aimed at the groove 5 of the V-arrangement of bolts 1, be contained in nut 2 on the bolt 1 at last and tighten up, when nut 2 when counter clockwise direction is rotated, one end of spring washer 3 is under the elastic force effect in the castellated locking trough 4 with insert nut 2 bottom surfaces, make it and to dismantle, thereby reach antitheft purpose.

Claims (1)

1. castellated anti-theft screw, this screw is made up of bolt, nut, spring washer, it is characterized in that on the bolt flutedly, has on the spring washer and the corresponding projection of bolt upper groove, and spring washer is enclosed within on the bolt, and there is castellated locking trough the nut bottom surface.

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