A cutting assembly for a rock excavation machine having a frame includes a boom and a cutting device supported on the boom. The boom includes a first portion and a second portion, the first portion supported for pivotable movement relative to the frame. In some embodiments, the first portion includes a first structure extending along a longitudinal base axis and a second structure moveable relative to the first portion in a direction parallel to the longitudinal base axis, and at least one bearing supports the second portion for movement relative to the first portion. In some embodiments, the second portion is pivotably coupled to the first portion by a universal joint, and a suspension system including a plurality of biasing members may be coupled between the first portion and the second portion.

A machine for excavating rock includes a frame, a cutting device, and a boom. The cutting device includes a cutting disc having a cutting edge, and the cutting disc is rotatable about a cutting device axis. The boom supports the cutting device and includes a first end, a second end, and a boom axis substantially parallel to the cutting device axis. The boom further includes a first portion and a second portion. The first portion is coupled to the frame for rotation about a first pivot axis between a raised position and a lowered position. The second portion is coupled to the cutting device, and the second portion is pivotable about a second pivot axis between a raised position and a lowered position.

The present invention relates to a milling drum box unit, in particular a quick-change milling drum box unit, for mounting to a self-propelled base machine to obtain a ground milling machine, the milling drum box unit, in particular quick-change milling drum box unit, comprising an interior configured to receive a milling drum and open downward in vertical direction and having a front wall, a rear wall, a top wall and two opposing side walls, a part of a fastening device for mounting the milling drum box unit, in particular quick-change milling drum box unit, to the base machine, a connection point arranged inside the interior of the milling drum box unit, in particular quick-change milling drum box unit, and configured to receive and establish a drive connection to a milling drum rotatable about a rotation axis, on sides of each side wall a lateral shield height-adjustable relative to the side wall, at least two drive energy-consuming consumer elements and/or at least two sensors for detecting an operating parameter. The present invention further relates to a ground milling machine, comprising a base machine with a machine frame, an operator platform, a drive motor and travel units driven by the drive motor, a milling drum box unit, in particular a quick-change milling drum box unit, with a milling drum for milling ground material. The ground milling machine further has a detachable, in particular hydraulically, electrically, electromechanically or pneumatically detachable, fastening device with which the milling drum box unit, in particular quick-change milling drum box unit, can be detachably fastened to the base machine of the ground milling machine.

The present invention relates to a milling drum box unit, in particular a quick-change milling drum box unit, for mounting to a self-propelled base machine to obtain a ground milling machine, the milling drum box unit, in particular quick-change milling drum box unit, comprising an interior configured to receive a milling drum and open downward in vertical direction and having a front wall, a rear wall, a top wall and two opposing side walls, a part of a fastening device for mounting the milling drum box unit, in particular quick-change milling drum box unit, to the base machine, a connection point arranged inside the interior of the milling drum box unit, in particular quick-change milling drum box unit, and configured to receive and establish a drive connection to a milling drum rotatable about a rotation axis, on sides of each side wall a lateral shield height-adjustable relative to the side wall, at least two drive energy-consuming consumer elements and/or at least two sensors for detecting an operating parameter. The present invention further relates to a ground milling machine, comprising a base machine with a machine frame, an operator platform, a drive motor and travel units driven by the drive motor, a milling drum box unit, in particular a quick-change milling drum box unit, with a milling drum for milling ground material. The ground milling machine further has a detachable, in particular hydraulically, electrically, electromechanically or pneumatically detachable, fastening device with which the milling drum box unit, in particular quick-change milling drum box unit, can be detachably fastened to the base machine of the ground milling machine.

A machine for excavating rock includes a frame, a cutting device, and a boom. The cutting device includes a cutting disc having a cutting edge, and the cutting disc is rotatable about a cutting device axis. The boom supports the cutting device and includes a first end, a second end, and a boom axis substantially parallel to the cutting device axis. The boom further includes a first portion and a second portion. The first portion is coupled to the frame for rotation about a first pivot axis between a raised position and a lowered position. The second portion is coupled to the cutting device, and the second portion is pivotable about a second pivot axis between a raised position and a lowered position.

A machine for excavating rock includes a frame, a cutting device, and a boom. The cutting device includes a cutting disc having a cutting edge, and the cutting disc is rotatable about a cutting device axis. The boom supports the cutting device and includes a first end, a second end, and a boom axis substantially parallel to the cutting device axis. The boom further includes a first portion and a second portion. The first portion is coupled to the frame for rotation about a first pivot axis between a raised position and a lowered position. The second portion is coupled to the cutting device, and the second portion is pivotable about a second pivot axis between a raised position and a lowered position.

A cutting assembly is provided for a rock excavation machine having a frame. The cutting assembly includes a boom, a cutting device, and a plurality of fluid actuators. The boom includes a base portion and a movable portion. The base portion is configured to be supported by the frame, and the movable portion is supported for sliding movement relative to the base portion in a direction parallel to a longitudinal axis of the base portion. The boom includes a wrist portion pivotably coupled to the movable portion at a pivot joint. The cutting device is supported on a distal end of the wrist portion. The fluid actuators are coupled between the base portion and the wrist portion. The fluid actuators are operable to move the movable portion and the wrist portion parallel to the longitudinal axis, and are also operable to bias the wrist portion against cutting loads exerted on the cutting device.

A cutting assembly is provided for a rock excavation machine having a frame. The cutting assembly includes a boom, a cutting device, and a plurality of fluid actuators. The boom includes a base portion and a movable portion. The base portion is configured to be supported by the frame, and the movable portion is supported for sliding movement relative to the base portion in a direction parallel to a longitudinal axis of the base portion. The boom includes a wrist portion pivotably coupled to the movable portion at a pivot joint. The cutting device is supported on a distal end of the wrist portion. The fluid actuators are coupled between the base portion and the wrist portion. The fluid actuators are operable to move the movable portion and the wrist portion parallel to the longitudinal axis, and are also operable to bias the wrist portion against cutting loads exerted on the cutting device.

A cutting assembly for a rock excavation machine including a frame. The cutting assembly includes a boom supported on the frame and a cutting device. In some aspects, the boom includes a first portion and a second portion, and the first portion includes a first structure and a second structure slidable relative to the first structure. The second portion includes a first member pivotably coupled to the second structure, and a second member pivotably coupled to the first member. The cutting device is supported on the second member. In some aspects, a material handling device is supported independently of the boom and movable between a retracted position and an extended position independent of the boom.

A cutting assembly for a rock excavation machine including a frame. The cutting assembly includes a boom supported on the frame and a cutting device. In some aspects, the boom includes a first portion and a second portion, and the first portion includes a first structure and a second structure slidable relative to the first structure. The second portion includes a first member pivotably coupled to the second structure, and a second member pivotably coupled to the first member. The cutting device is supported on the second member. In some aspects, a material handling device is supported independently of the boom and movable between a retracted position and an extended position independent of the boom.