Device for securing teeth to tooth adapters of an earth-moving machine through pins

Abstract

A device for securing teeth to a tooth adapter of an earth-moving machine includes a pin removably inserted through at least one first aperture on a tooth and one second aperture on a tooth adapter of a machine. The pin includes at least one expanding element adapted to reversibly switch from a retracted position to an expanded position by moving in a plane substantially perpendicular to the longitudinal axis (x-x) of the pin. The device further includes at least one retaining element associated with at least one of the first and second apertures, and provided with at least one seat for at least partially receiving the expanding element when the expanding element is in the expanded position.

1 . A device for securing teeth to a tooth adapter of an earth-moving machine by pins, comprising:
 a pin removably insertable through at least one first aperture on a tooth and one second aperture on a tooth adapter of said machine; said pin comprising: at least one expanding element adapted to reversibly switch from a retracted position to an expanded position by moving in a plane substantially perpendicular to a longitudinal axis of said pin;   said at least one expanding element comprising a sliding element adapted for sliding between said expanded position and said retracted position;   at least one duct formed in said pin and providing reversible movement of said at least one expanding element between the expanded position and the retracted position;   a screw, at least partially insertable into a hole provided in said pin, adapted to allow said at least one expanding element to reversibly switch from said retracted position to said expanded position;   at least one annular ring associable with at least one of said first and second apertures, and provided with at least one seat for at least partially receiving said at least one expanding element when said at least one expanding element is in said expanded position.   
     
     
         2 . The device according to  claim 1 , wherein said seat has a continuous annular portion along the entire annular ring. 
     
     
         3 . (canceled) 
     
     
         4 . (canceled) 
     
     
         5 . The device according to  claim 1 , comprising elastic means for bringing said at least one expanding element towards one of said expanded position and said retracted position. 
     
     
         6 . The device according to  claim 5 , wherein said elastic means are capable of bringing said expanding element towards said expanded position. 
     
     
         7 . The device according to  claim 1 , wherein an outer surface of said pin has a shape that limits sliding of said annular ring along the longitudinal axis of said pin. 
     
     
         8 . The device according to  claim 7 , wherein an outer surface of said pin has two different cross-sections along the longitudinal axis. 
     
     
         9 . The device according to  claim 8 , wherein a part of the pin which extends from a first end of the pin to said at least one expanding element has a smaller cross-section; a remaining part of the pin has a larger cross-section; a difference between the cross-sections of said parts creating a projection which limits sliding of said annular ring along said pin. 
     
     
         10 .- 14 . (canceled) 
     
     
         15 . The device according to  claim 1 , wherein said at least one expanding element moves in a substantially radial manner relative to the longitudinal axis of said pin. 
     
     
         16 . The device according to  claim 1 , wherein said at least one expanding element comprises at least one ball. 
     
     
         17 . The device according to  claim 1 , wherein said at least one expanding element comprises at least one bar. 
     
     
         18 . The device according to  claim 1 , wherein an outer surface of said pin is substantially cylindrical in shape. 
     
     
         19 . The device according to  claim 1 , wherein an outer surface of said pin is substantially prismatic in shape. 
     
     
         20 . The device according to  claim 1 , comprising:
 a housing formed on said pin and shaped for receiving a tool or wrench; and   a closing element for closing the housing.   
     
     
         21 . An assembly comprising:
 a tooth having at least one first aperture;   a tooth adapter having at least one second aperture;   a device according to  claim 1 ;   wherein said annular ring is at least partially insertable into a cavity formed on at least one of said first aperture and said second aperture; said pin being removably insertable through at least said first aperture and said second aperture.