Milling attachment
AssigneeWirtgen GmbH
InventorsMarcel Joisten, Stefan Abresch
Life of this patent
Estimating the term…
Abstract
A work machine includes a machine frame, an attachment mounting frame, and a milling attachment. A hydraulic tilt cylinder is configured to tilt the milling attachment about a tilt axis relative to the attachment mounting frame. A hydraulic circuit is connected to the hydraulic tilt cylinder and is operable in both an active tilt mode where hydraulic fluid under pressure is applied to the hydraulic tilt cylinder to tilt the milling attachment, and a floating mode in which the hydraulic tilt cylinder does not apply any tilting force to the milling attachment, the hydraulic circuit being configured to be switchable between the active tilt mode and the floating mode during milling of a ground surface by rotating the milling drum.
Claims23
A method of operating a milling attachment of a work machine, the work machine including:
- a machine frame;
- an attachment mounting frame mounted on the machine frame;
- a milling attachment configured to be mounted on the attachment mounting frame so that the milling attachment can be manipulated relative to the machine frame, the milling attachment including a milling drum housing and a milling drum rotatably mounted about a milling drum axis within the milling drum housing, the milling drum housing being pivotably mounted on the attachment mounting frame such that the milling attachment is tiltable relative to the attachment mounting frame about a tilt axis extending perpendicular to the milling drum axis;
- a hydraulic tilt cylinder configured to tilt the milling attachment about the tilt axis relative to the attachment mounting frame;
- a hydraulic circuit connected to the hydraulic tilt cylinder and being operable in both an active tilt mode where hydraulic fluid under pressure is applied to the hydraulic tilt cylinder to tilt the milling attachment, and a floating mode in which the hydraulic tilt cylinder does not apply any tilting force to the milling attachment;
- wherein the method comprises:
- milling a ground surface by rotating the milling drum;
- and
- during the milling, switching the hydraulic circuit between the active tilt mode and the floating mode.
A method of operating a milling attachment of a work machine, the work machine including:
- a machine frame;
- an attachment mounting frame mounted on the machine frame;
- a milling attachment configured to be mounted on the attachment mounting frame so that the milling attachment can be manipulated relative to the machine frame, the milling attachment including a milling drum housing and a milling drum rotatably mounted about a milling drum axis within the milling drum housing, the milling drum housing being pivotably mounted on the attachment mounting frame such that the milling attachment is tiltable relative to the attachment mounting frame about a tilt axis extending perpendicular to the milling drum axis;
- a hydraulic tilt cylinder configured to tilt the milling attachment about the tilt axis relative to the attachment mounting frame;
- a hydraulic circuit connected to the hydraulic tilt cylinder and being operable in both an active tilt mode where hydraulic fluid under pressure is applied to the hydraulic tilt cylinder to tilt the milling attachment, and a floating mode in which the hydraulic tilt cylinder does not apply any tilting force to the milling attachment;
- wherein the method comprises:
- performing a milling operation by milling a ground surface by rotating the milling drum;
- and
- during the milling operation, switching the hydraulic circuit between the active tilt mode and the floating mode without interrupting the milling operation, the switching including manipulating a tilt control located within an operator's station of the work machine.
A work machine, comprising:
- a machine frame;
- an attachment mounting frame mounted on the machine frame;
- a milling attachment configured to be mounted on the attachment mounting frame so that the milling attachment can be manipulated relative to the machine frame, the milling attachment including a milling drum housing and a milling drum rotatably mounted about a milling drum axis within the milling drum housing, the milling drum housing being pivotably mounted on the attachment mounting frame such that the milling attachment is tiltable relative to the attachment mounting frame about a tilt axis extending perpendicular to the milling drum axis;
- a hydraulic tilt cylinder configured to tilt the milling attachment about the tilt axis relative to the attachment mounting frame;
- and
- a hydraulic circuit connected to the hydraulic tilt cylinder and being operable in both an active tilt mode where hydraulic fluid under pressure is applied to the hydraulic tilt cylinder to tilt the milling attachment, and a floating mode in which the hydraulic tilt cylinder does not apply any tilting force to the milling attachment, the hydraulic circuit being configured to be switchable between the active tilt mode and the floating mode during milling of a ground surface by rotating the milling drum.
Dependencies are inferred from the claim text.