Drilling machine having a grab-bucket chassis provided with a quick-release milling device

Abstract

The invention relates to a drilling machine (10) including a grab frame (12) which comprises a body (16) extending along a longitudinal direction (L), a movable member (32), a first arm (34) pivotable relative to the movable member, a second arm (36) pivotable relative to the movable member (32), the second arm having a lower end part, at least one actuator device (37) connected to the body to move at least the first arm (34) relative to the body; The invention is characterized in that said drilling machine (10) includes a removable milling device (100) including a first dismountable securing device (120) for removably fixing the support (110) to the body (16), and a second dismountable securing device (150) for removably fixing the support (110) to the first arm, whereby the milling device can be easily dismounted from the frame.

1 - 22 . (canceled) 
     
     
         23 . A drilling machine including:
 a grab frame which comprises:
 a body extending along a longitudinal direction between an upper end part and a lower end part, the body having a guide device extending along the longitudinal direction, 
 a movable member cooperating with the guide device so that the movable member is movable relative to the body along the longitudinal direction; 
 a first arm pivotable relative to the movable member, the first arm having a lower end part; 
 a second arm pivotable relative to the movable member, the second arm having a lower end part, the first and second arms being pivotable relative to each other, 
 at least one actuator device connected to the body to move at least the first arm relative to the body; 
   said drilling machine being characterized in that it further includes:   a removable milling device including:
 at least a first mill drum, 
 at least a first motor for driving in rotation the first mill drum about a first rotation axis, 
 a support carrying the first mill drum and the first motor; 
 the drilling machine further including: 
 a first dismountable securing device for removably fixing the support to the lower end part of the body, 
 a second dismountable securing device for removably fixing the support to the lower end part of the first arm, 
   whereby the milling device can be easily dismounted from the frame.   
     
     
         24 . The drilling machine according to  claim 23 , wherein the support includes:
 a first support portion;   a second support portion which is movable relative to the first support portion, the first mill drum and the first motor being mounted on the second support portion,   wherein the first dismountable securing device is configured to removably fix the first support portion to the body, and wherein the second dismountable securing device is configured to removably fix the second support portion to the lower end part of the first arm, whereby the actuation of the actuator device has the effect of moving the first mill drum relative to the frame.   
     
     
         25 . The drilling machine according to  claim 24 , wherein:
 the second support portion is pivotally fixed to the first support portion about a first pivoting axis,   whereby the actuation of the actuator device has the effect of pivoting the first mill drum relative to the frame about the first pivoting axis.   
     
     
         26 . The drilling machine according to  claim 24 , the first dismountable securing device includes:
 a mounting element located in the lower end part of the body,   at least a first opening formed in the mounting element,   a first mounting member including:
 a first fixing stud secured to the first support portion and shaped to engage in said first opening; and 
 a first locking device cooperating with the first fixing stud to hold the first support portion relative to the mounting element. 
   
     
     
         27 . The drilling machine according to  claim 26 , wherein the first dismountable securing device further includes:
 a second opening formed in the mounting element,   the first mounting member further comprising:
 a second fixing stud secured to the first support portion and shaped to engage in said second opening, and 
 a second locking device cooperating with the second fixing stud to block the first support portion relative to the mounting element. 
   
     
     
         28 . The drilling machine according to  claim 24 , wherein the second dismountable securing device includes a first pivot element connected to the second support portion, and a first orifice formed at the lower end part of the first arm, the first pivot element being shaped to be engaged in the first orifice. 
     
     
         29 . The drilling machine according to  claim 23 , wherein the milling device further includes:
 a second mill drum,   a second motor for driving in rotation the second mill drum, the second mill drum and the second motor being carried by the support.   
     
     
         30 . The drilling machine according to  claim 23 , further including a third dismountable securing device for removably fixing the support to the lower end portion of the second arm. 
     
     
         31 . The drilling machine according to  claim 24 , wherein the milling device further includes:
 a second mill drum,   a second motor for driving in rotation the second mill drum, the second mill drum and the second motor being carried by the support, wherein the support further includes:   a third support portion pivotally fixed to the first support portion about a second pivoting axis, the second mill drum and the second motor being mounted on the third support portion,   and wherein the third dismountable securing device is configured to removably fix the third support portion to the lower end part of the second arm.   
     
     
         32 . The drilling machine according to  claim 25 , wherein the support further includes:
 a third support portion pivotally fixed to the first support portion about a second pivoting axis, the second mill drum and the second motor being mounted on the third support portion,   and wherein the third dismountable securing device is configured to removably fix the third support portion to the lower end part of the second arm,   and wherein the first and second pivoting axes are parallel.   
     
     
         33 . The drilling machine according to  claim 31 , wherein the third dismountable securing device includes a second pivot element connected to the third support portion, and a second orifice formed at the lower end part of the second arm, the second pivot element being shaped to be engaged in the second orifice. 
     
     
         34 . The drilling machine according to  claim 23 , wherein the actuator device includes a first actuator which is connected to the body and to the first arm. 
     
     
         35 . The drilling machine according to  claim 34 , wherein the grab frame further includes a second actuator connected to the body and to the second arm for moving the second arm relative to the body. 
     
     
         36 . A variable-geometry milling device for a grab frame, including:
 first and second mill drums;   first and second motors for driving in rotation the first and second mill drums about first and second rotation axes;   a support comprising:
 a first support portion equipped with a first member for mounting on the frame, 
 a second support portion which is movable relative to the first support portion, the first mill drum and the first motor being mounted on the second support portion, the second support portion being equipped with a second member for mounting on the frame, 
 a third support portion which is movable relative to the first support portion, the second mill drum and the second motor being mounted on the third support portion, the third support portion being equipped with a third member for mounting on frame. 
   
     
     
         37 . A milling device according to  claim 36 , wherein the second support portion is pivotally fixed to the first support portion about a first pivoting axis, and the third support portion is pivotally fixed to the first support portion about a second pivoting axis. 
     
     
         38 . The milling device according to  claim 37 , wherein the first and second pivoting axes are parallel to the rotation axis of the first mill drum. 
     
     
         39 . The milling device according to  claim 37 , wherein the second and third members for mounting on the frame are located above the first and second pivoting axes. 
     
     
         40 . The milling device according to  claim 36 , wherein the second mounting member includes a first pivot element, which extends parallel to the first pivoting axis. 
     
     
         41 . The milling device according to  claim 36 , wherein the first mounting member includes at least one fixing stud protruding from a board of the first support portion. 
     
     
         42 . The milling device according to  claim 36 , wherein the first motor is a hydraulic motor, and wherein at least the second support portion further includes a hydraulic junction box connected to the first motor. 
     
     
         43 . The milling device according to  claim 36 , wherein the milling device has a deployed position and a retracted position in which a gap between the first and second mill drums is minimal, the milling device further including an abutment device in order to maintain a minimum gap between the first and second mill drums when the milling device is in the retracted position. 
     
     
         44 . The milling device according to  claim 43 , wherein the second and third support portions are shaped to come into contact against each other when the milling device is in the retracted position, the abutment device being constituted by abutment faces disposed oppositely on each of the second and third support portions.