CN2908896Y - Fastener of anti-loss screw - Google Patents

Abstract

The utility model relates to an anti-theft threaded fastener, which comprises a bolt and an assorted nut. Axial blind pinholes are provided on threads of the nut and centers of the blind pinholes are between pitch diameter of threads and outside diameter with bore less than or equal to 1/2 of difference of outside diameter of thread and inside diameter of thread; dowels are tightly fitted with the blind pinholes. When the dowels are mounted, it is recommended that bolts in corresponding direction of the pinholes should be treated so that dowels can be directly inserted into the blind pinholes, and both are tightly joined after threads are cut on bolts, and the nut fails to be screwed loose. The utility model is simple in structure and properly designed, is applicable for mass production, low in manufacturing cost and usable. The utility model can be widely applied for connection of fastening, arrestment and anti-theft devices in facilities of electric power, communication, traffic and water conservancy and so on.

Description

Antitheft threaded fastener

Technical field

The utility model relates to a kind of fastening piece, is the threaded fastener with anti-theft feature specifically.

Background technique

According to the technical requirements of power department, at present, 10 meters high following bolton links must have anti-theft feature in the electric power transmission iron tower device, particularly the fastening connection piece between power transmission cable.Existing anti-theft bolt is radially to pass screw rod and nut with pin behind nut screwing clamping, and with both fixing pinnings, obviously, construction is very inconvenient like this.Also have plenty of the nut external diameter is enlarged, increase thickness simultaneously, be provided with a recessed circular hole at an end face of screw, use the nut check of a little external diameter in the hole again, obviously, this nut must be installed with special tool, has improved cost of production simultaneously, and uses very inconvenient.

The model utility content

The utility model provides a kind of simple and practical in order to overcome the defective of prior art, the antitheft threaded fastener that cost is low.

The antitheft threaded fastener of the utility model comprises bolt and equipped nut, wherein is provided with axial blind pin-and-hole on the screw thread of nut, and blind pin-and-hole is centered close between effective diameter of thread and the external diameter, its aperture be less than or equal to major diameter of thread and internal diameter difference 1/2; Pin and blind pin-and-hole drive fit are installed.

The antitheft threaded fastener of the utility model, wherein the length of pin is less than or equal to the end face of nut.

The antitheft threaded fastener of the utility model comprises bolt, with the nut and the pin of blind pin-and-hole, during the edge pin, preferably will handle with the screw rod that the pin-and-hole counterparty makes progress, so that pin directly inserts in the blind pin-and-hole, and behind the screw thread on the cutting screw rod both are locked, nut can not be turned unclamp.It is simple and reasonable, be fit to produce in batches, and cost of production is low, and is easy to use.Can be widely used in being connected of fastening, locking and anti-theft device of facilities such as electric power, communication, traffic and water conservancy.

Description of drawings

Fig. 1 is the nut structure schematic representation (blind pin-and-hole is centered close on the effective diameter of thread) in the antitheft threaded fastener of the utility model;

Fig. 2 implements situation structural representation (blind pin-and-hole is centered close on the major diameter of thread) for the antitheft threaded fastener of the utility model.

Embodiment

By Fig. 1, Fig. 2 as seen, the antitheft threaded fastener of the utility model comprises nut 1, bolt 4 and pin 3, wherein on the screw thread of nut 1, be provided with axial blind pin-and-hole 2, the opening end of blind pin-and-hole 2 is positioned at the upper surface of nut 1, and blind pin-and-hole 2 is centered close between effective diameter of thread (see figure 1) and the external diameter (see figure 2), its aperture be less than or equal to major diameter of thread and internal diameter difference 1/2; Pin 3 is installed with blind pin-and-hole 2 drive fits.

During installation, will there be the bolt 4 of head to pass the antitheft parts 5 that need connection fastening earlier, tighten fixing with nut 1, pin 3 is bumped in the blind pin-and-hole 2 again, and the length of pin 3 is not stretched out the end face of nut 1, prevents from separately pin 3 to be taken out, thereby plays the anti-loose anti-theft effect better.During edge pin 3, preferably will handle,, and behind the screw thread on the cutting bolt 4 both be locked, and nut 1 can not be turned unclamp so that pin 3 directly inserts in the blind pin-and-hole 2 with the bolt 4 that blind pin-and-hole 2 counterparties make progress.For the standard nut of M10～M68, the diameter of general hole and pin is 1.5～3.0mm, and anti-theft effect is fine.

Claims (2)

1, a kind of antitheft threaded fastener, comprise bolt (4) and equipped nut (1), it is characterized in that on the screw thread of described nut (1), being provided with axial blind pin-and-hole (2), and described blind pin-and-hole (2) is centered close between effective diameter of thread and the external diameter, its aperture be less than or equal to major diameter of thread and internal diameter difference 1/2; Pin (3) is installed with described blind pin-and-hole (2) drive fit.

2, antitheft threaded fastener according to claim 1 is characterized in that the length of described pin (3) is less than or equal to the end face of described nut (1).

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