CN201401411Y - Screw cap - Google Patents

Abstract

The utility model discloses a screw cap, which comprises an upper inner threaded hole, a ball body, backward screw threads and a lower threaded hole, and is characterized in that the backward screw threads are left on the periphery of the center surface of the ball body from the lower threaded hole to the upper inner threaded hole. When in use, the ball body of the screw cap is clamped by an elliptical ball-shaped wrench arranged in a ball-shaped wrench, a bolt in the prior art is sleeved in the lower threaded hole, and the backward screw threads are fastened or loosened. The screw cap has theadvantages of simple structure, low cost and strong practicality, and transition implementation is reached through the selling control of ball-shaped wrenches, thereby guaranteeing the safety of railways.

Description

A kind of nut

Affiliated technical field

The utility model relates to a kind of nut, relates in particular to the antitheft spheric nut of a kind of railroad rail, belongs to technical field of fastening.

Background technique

At present, the railroad rail anti-theft screw cap of known technology, study more active, fettered by thought of people, the Wrench of only considering prior art is matched in the railroad rail anti-theft screw cap, before the utility model is not made, the use of the antitheft spheric nut of no railway rail, the patent searching document does not have disclosing of technological scheme.

Summary of the invention

There is not the deficiency of the antitheft spheric nut of railway rail in order to overcome prior art; the purpose of this utility model is in order to provide a kind of railroad rail antitheft spheric nut; this spheric nut uses spherical spanner to tighten or loosen; because of spherical spanner involves great expense; thereby also can retrain robber's pilferage behavior, thereby protect the safety of railway.

In order to reach the purpose of this utility model, the technological scheme that its technical problem that solves the utility model adopts is: be made up of last inner bolt hole, spheroid, reverse screw thread, following screw, it is characterized in that screw under the center surface of spheroid leaves reverse screw thread to the circle edge of last inner bolt hole, to descend screw and prior art bolt to be inserted in the oval spherical spanner clamping spheroid of the present utility model in the spherical spanner during use, and make reverse screw threads for fastening or unclamp to get final product.

The beneficial effects of the utility model are: simplicity of design, and with low cost, can reach transition by the sales control of spherical spanner and implement to guarantee railway security that practicability is bigger.

Description of drawings

The utility model is described in further detail below by drawings and Examples.

Fig. 1 is the utility model schematic representation.

Inner bolt hole on 1. among the figure, 2. spheroid, 3. reverse screw thread, 4. descend screw.

Embodiment

The utility model is made up of last inner bolt hole 1, spheroid 2, reverse screw thread 3, following screw 4, it is characterized in that screw 4 under the center surface of spheroid 2 leaves reverse screw thread 3 to the circle edge of last inner bolt hole 1, to descend screw 4 and prior art bolt to be inserted in the oval spherical spanner clamping spheroid 2 of the present utility model in the spherical spanner during use, and reverse screw thread 3 be tightened or loosened get final product.

Claims (1)

1. nut by last inner bolt hole (1), spheroid (2), reverse screw thread (3), screw (4) is formed down, is characterized in that screw (4) under the center surface of spheroid (2) leaves reverse screw thread (3) to the circle edge of last inner bolt hole (1).

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