Detachable fastening system between a male piece and a female piece, pin and female piece

Abstract

Detachable fastening system between a male piece ( 2 ) and a female piece ( 1 ), pin ( 3 ) and female piece ( 1 ), specifically for use in machines for moving earth and stones. It is formed by a tooth ( 2 ) with a transverse aperture, a tooth holder ( 2 ) with another transverse aperture, a pin with an intermediate nipple, and an elastic tensor ( 4 ) located in a complementary cavity of the tooth holder ( 2 ). The penetration and subsequent rotation of the pin ( 3 ) immobilizes it axially, as it is held in said angular position by the action of the tensor ( 4 ). In addition, the pin ( 3 ) has at one end a projection that interacts with a groove ramped helicoidally and fitted in the aperture of the tooth in order to absorb the axial forces, by unloading the tensor ( 4 ) thereof, and also in order to limit the angular distance traveled by the pin between the blocking and unblocking positions, and in order to facilitate possible extraction thereof.

1 - 22 . (canceled) 
     
     
         23 . A female piece used for the movement of earth and stones, comprising a hollow configured to house a nose of a male piece and at least one through aperture for introducing a fastening element or pin, the aperture comprising an inclined surface facing an exterior of the female piece along an axis of the aperture, wherein the inclined surface is helical and a one-piece integral construction with a body portion of the female piece that defines the aperture.