CN2506807Y - Theft-proof nut - Google Patents

Abstract

The utility model relates to a theft proof nut, comprising a hexagonal nut 1, a round nut 2, two sawtooth teeth 4 arranged in a supporting surface contacted with a supporting surface 3 of the round nut 2 and the hexagonal nut 1 and two sawtooth teeth 5 matched with the sawtooth teeth 4 of the round nut 2 in the supporting surface 3 of the hexagonal nut 1. The theft proof nut of the utility model has simple and reasonable structure, can realize fasten, anti loose, theft proof and refasten, convenient for use, and is widely applied in power, information, transportation, petroleum chemistry, water resources facilities to realize fasten, anti loose theft proof and refasten.

Description

Anti-theft nut

Technical field

The utility model relates to a kind of connection fastening piece, specifically, relates to a kind of anti-theft nut.

Background technique

At present, the fastening employing bolts and nuts of electric power transmission iron tower, in order to prevent to steal and become flexible, have plenty of behind nut screwing clamping, with pin bolts and nuts are pinned, have plenty of, establish a circular hole at an end of tapped hole with the expansion of nut external diameter, place the locking nut of a little external diameter in the hole, this nut must could be dismantled with special tool.First kind of device can not be antitheft, though second kind of device is antitheft, must use special tool, uses inconvenience, and cost is corresponding have been improved.

The purpose of this utility model is to overcome above-mentioned defective, and a kind of anti-theft nut of simple in structure, anti-loose anti-theft is provided.

The model utility content

Anti-theft nut described in the utility model, comprise hexagon nut and round nut, described round nut with the contacted supporting surface of hexagon nut on have two sawtooth teeth, have two sawtooth teeth that match with sawtooth tooth on the round nut on the supporting surface of described hexagon nut.

Wherein, the shape of described sawtooth tooth is that the one side of teeth is vertical plane, and another side is the plane of inclination, and the true dip direction of sawtooth tooth is opposite with the true dip direction of sawtooth tooth.

Wherein, the tooth depth of described sawtooth tooth is 2-3mm.

Anti-theft nut described in the utility model has following advantage:

1, simple and reasonable, adopt the combination of hexagon nut and round nut, it is fastening, locking to use saw tooth structure to realize;

2, easy to use, during installation, need not to use special tool, be fit to produce in batches, cost of production is low and user cost is all very low;

3, practical, be widely used in the bolton of facilities such as electric power, information, traffic, petrochemical industry, water conservancy, locking, antitheft and tighten up.

Description of drawings

Fig. 1 is the plan view of anti-theft nut described in the utility model;

The A of the hexagon nut that Fig. 2 is among Fig. 1 to be looked is to schematic representation;

Fig. 3 is an anti-theft nut assembling schematic representation described in the utility model.

Embodiment

Referring to Fig. 1 and 2, anti-theft nut described in the utility model, comprise a hexagon nut 1, with a profile be cylindrical round nut 2, described round nut 2 with the supporting surface 3 contacted supporting surfaces of hexagon nut 1 on have two sawtooth teeth 4, have two sawtooth teeth 5 that match with sawtooth tooth 4 on the round nut 2 on the supporting surface 3 of described hexagon nut 1.The shape of described sawtooth tooth 4,5 is that the one side of teeth is vertical plane, and another side is the plane of inclination, and this plane of inclination is the junction surface of the bottom of the summit of a sawtooth and another sawtooth, and the true dip direction of sawtooth tooth 5 is opposite with the true dip direction of sawtooth tooth 4.When just twisting, nut is fastening or tighten up, promptly locked when oppositely twisting, form whole antitheft.

The tooth depth of described sawtooth tooth 4,5 according to the diameter of fastening bolt determine, be generally 2-4mm, as fastening bolt be M16, it highly is 2.5mm, if M20, it highly is 3mm.

Fig. 3 is an anti-theft nut assembling schematic representation described in the utility model, during work, with wrench in a clockwise direction plate twist hexagon nut, the vertical plane by teeth drives round nut, reaches the purpose of fastening workpiece, twist hexagon nut by the counter clockwise direction plate then, hexagon nut reverses and round nut is motionless, two vertical flank of tooth separation, and two tooth inclined-plane wedgings are locked, firmly big more, lock tightly more; When tightening up, only need with wrench along twisting hexagon nut, just can repeat fastening, after achieving the goal, with hexagon nut contrary twist locked.Adopt this structure, mounted anti-theft nut can't be dismantled, because the contrary hexagon nut of twisting, can only be locked, round nut is reversed, use general instrument to twist by plate, make anti-theft feature show more outstandingly.

Claims (3)

1, a kind of anti-theft nut, comprise hexagon nut (1), it is characterized in that also having round nut (2), described round nut (2) with the contacted supporting surface of supporting surface (3) of hexagon nut (1) on have two sawtooth teeth (4), have two sawtooth teeth (5) that match with sawtooth tooth (4) on the round nut (2) on the supporting surface (3) of described hexagon nut (1).

2, anti-theft nut according to claim 1, the shape that it is characterized in that described sawtooth tooth (4,5) are that the one side of teeth is vertical plane, and another side is the plane of inclination, and the true dip direction of sawtooth tooth (5) is opposite with the true dip direction of sawtooth tooth (4).

3, anti-theft nut according to claim 1 and 2, the tooth depth that it is characterized in that described sawtooth tooth (4,5) is 2-3mm.

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