Rig mounted compactor

Abstract

A rig mounted compactor is provided. The rig mounted compactor comprises a shaft rotatably arranged to cause vibration of the rig mounted compactor with a first amplitude and a second amplitude by means of a first weight and a second weight and a hydraulic motor arranged to drive the shaft. The first weight is eccentrically fixed to the shaft, and the second weight is eccentrically arranged at the shaft. The second weight is clutchable between an idle mode when driven in the direction, and a rotatable mode when driven in the direction. The second weight is arranged to idle with respect to the shaft in the idle mode. The shaft is arranged to cause the first amplitude of the vibration by the first weight in the idle mode, and the second weight is arranged to rotate synchronously with the shaft in the rotatable mode to cause the second amplitude of the vibration.

1 . A rig mounted compactor comprising:
 a shaft rotatably arranged to cause vibration of said rig mounted compactor with a first amplitude and a second amplitude by means of a first weight and a second weight,   a hydraulic motor arranged to drive said shaft, wherein said hydraulic motor is arranged to drive said shaft in a direction, and wherein said rig mounted compactor comprises:   said first weight, being eccentrically fixed to said shaft, and   said second weight, being eccentrically arranged at said shaft, wherein said second weight is clutchable between an idle mode when driven in said direction, and a rotatable mode when driven in said direction, wherein said second weight is arranged to idle with respect to said shaft in said idle mode, wherein said shaft is arranged to cause the first amplitude of the vibration by said first weight in said idle mode, and wherein said second weight is arranged to rotate synchronously with said shaft in said rotatable mode to cause the second amplitude of the vibration.   
     
     
         2 . The rig mounted compactor according to  claim 1 , wherein weight for causing the vibration consists of the first weight and the second weight. 
     
     
         3 . The rig mounted compactor according to  claim 1 , wherein said first weight and said second weight are arranged to cause said second amplitude of the vibration to be double said first amplitude of the vibration. 
     
     
         4 . The rig mounted compactor according to  claim 1 , wherein said second weight is arranged to rotate in phase with said first weight in said rotatable mode. 
     
     
         5 . The rig mounted compactor according to  claim 1 , wherein the second weight is clutchable by means of a clutch assembly, wherein the rig mounted compactor comprises said clutch assembly being arranged to connect said second weight to said shaft in said rotatable mode and arranged to disconnect said second weight from said shaft in said idle mode. 
     
     
         6 . The rig mounted compactor according to  claim 5 , wherein said clutch assembly comprises:
 a sleeve, having a through-hole for receiving said shaft, freely rotatably arranged at said shaft, wherein said sleeve is fixedly arranged at said second weight,   a connection member displacably arranged in an opening provided in said sleeve, and   a control member arranged to displace said connecting member between a disconnected position and a connected position, wherein said second weight is in said idle mode when said connecting member is in said disconnected position, and wherein said second weight is in said rotatable mode when said connecting member is in said connected position, wherein   said shaft comprises a cavity arranged at an outer surface of said shaft, wherein said connection member is received by said cavity in said connected position and wherein said connection member is extracted from said cavity in said disconnected position.   
     
     
         7 . The rig mounted compactor according to  claim 6 , wherein said sleeve is provided with at least three openings including said opening, wherein said at least three openings are arranged along a first cross-section of said sleeve, and
 wherein said shaft comprises at least three cavities, including said cavity, wherein said at least three cavities are arranged along a second cross-section of said shaft, and   wherein said at least three openings are unequally spaced along said first cross-section of said sleeve and wherein said at least three cavities are unequally spaced along said second cross-section of said shaft, and   wherein said clutch assembly comprises at least three connection members, including said connection member, and wherein each of said at least three connection members is received by a respective one of said at least three cavities in a respective connected position and wherein each of said at least three connection members is extracted from a respective one of said at least three cavities in a respective disconnected position.   
     
     
         8 . The rig mounted compactor according to  claim 7 , wherein said at least three openings are spaced from each other with 110 degrees and 150 degrees, and said at least three cavities are spaced from each other with 110 degrees and 150 degrees.