Anti-theft bolt with improved structure

Anti-theft bolt with improved structure

  • CN 2,564,789 Y
  • Filed: 08/01/2002
  • Issued: 08/06/2003
  • Est. Priority Date: 08/01/2002
  • Status: Active Grant
First Claim
Patent Images

1. structure improved anti-theft bolt, it mainly is made up of bolt, pad, nut, and wherein bolt tool bolt head and bolt axis is characterized in that:

  • The bolt head of this bolt becomes Hexagon, that the inner edge of its each side is provided with is equiangularly arranged, the high on one side low on one side wedge shape inclined-plane that is inclined thrust surface of tool, and each wedge shape inclined-plane joins continuously, the most shallow place of inclined thrust surface of last breach is in harmony is the inclined thrust surface bosom of next breach, and each wedge shape inclined-plane joining place forms the block face of the high low head of tool;

    This pad is oblate type, and its diameter is equal to the maximum diameter of bolt head approximately, and central authorities are provided with perforation, and the aperture is slightly larger than the bolt axis diameter of axle;

    Wherein one side in pad is formed with and the corresponding continuous inclined-plane that agrees with, each wedge shape inclined-plane of bolt head, the thinnest part on last inclined-plane is in harmony is the thickness on next inclined-plane, form the bearing surface of the high low head of tool in each joining place, in addition, this pad another side is provided with the arris fillet that several five equilibriums are provided with, this arris fillet tool one facade and an inclined-plane, the continuous inclined-plane that pushes away tilted direction and pad on inclined-plane to push away tilted direction identical;

    Nut becomes Hexagon, and the inner edge of its each side has the wedge shape inclined-plane with the relative moulding in continuous inclined-plane of pad, and each wedge shape inclined-plane joining place forms the block face of the high low head of tool equally.

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