CN2284879Y - Check screw - Google Patents

Abstract

The utility model relates to a looseness-proof backing-stop screw for fixing and connecting objects made of non-metal material, which is integrally composed of a screw rod and a bolt head. The bearing surface of the bolt head is additionally provided with saw teeth which are uniformly distributed and are preset at a certain angle to cause the bearing surface of the screw to be tightly attached to the surface of a connection body with less hardness without generating looseness. The utility model has the advantages of simple structure, low cost, convenient operation, etc., and is particularly suitable for connection among the small objects which are made of material with less hardness.

Description

Locking stopping screw

The utility model relates to a kind of element of fixed object, especially for the loosening stopping screw of object that prevents that hardness material of the fixedly connected end from making.

Existing screw (comprising bolt) in use owing to reasons such as vibration or cold and hot contractions, tends to produce and becomes flexible, even the phenomenon that comes off; For this reason, people increase a serrated lock washer when being screwed object, like this, although pad not can be bonded body and separate, owing to there is not engagement, still have loosening between screw and the packing ring; And this screw is being produced, when using, is being taken material, time-consuming.

It is a kind of both simple in structure, easy to use that the purpose of the utility model is to provide, and can prevent to be bonded the loosening stopping screw of thing again.

Locking stopping screw is to increase sawtooth on the supporting surface of plain screw, and set certain sawtooth angle, the supporting surface of screw and union body surface are adjacent to after, hardness union body surface in the end produces groove, and meshing with the screw supporting surface, thereby the assurance screw can not reverse and produce loosening.

The utlity model has simple in structure, at the bottom of the cost, advantage such as easy to use, the connection between the smallclothes object that is specially adapted to make by end hardness material.

The utility model will be further described below in conjunction with embodiment shown in the drawings.

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

Fig. 2 is the schematic representation of stud head supporting surface.

Fig. 3 is the utility model saw tooth structure enlarged view.

Locking stopping screw constitutes integral body by screw mandrel 4 and stud head 2, is uniform-distribution with the sawtooth 3 that 24 sizes, shape equate on the supporting surface of stud head 2, and the number of sawtooth 3 is decided on the size of whole screw, can be 12, or 20; The toothholder limit of sawtooth 3 and angle α, the β between the level are respectively: α=45 °-135 °, 45 ° of β ∠, and two angle sums satisfy: alpha+beta=45 °-175 °, the angle shown in the figure: α=75 °, β=20 °.Have elongated slot 1 or "+" word groove on the end face of stud head 2, make the usefulness of the twisted screw of opener.

Claims (2)

1, a kind of locking stopping screw, it is made of whole screw mandrel (4) and bolt head (2), and its special card on the supporting surface that is stud head (2) is uniform-distribution with sawtooth (3).

2, locking stopping screw according to claim 1 is characterized in that: the toothholder limit of described sawtooth (3) and angle α, the β between the level meet the following conditions:

α＝45°-135°

β∠45°

α+β＝45°-175°

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