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US 11,692,334 B2Granted
Excavator
AssigneeSumitomo Heavy Industries, Ltd.
InventorsJunichi Okada, Masaru Onodera
Life of this patent
Estimating the term…
Abstract
An excavator includes a traveling body, an upper turning body rotatably provided on the traveling body, an attachment which has a boom, an arm, and a bucket and is attached to the upper turning body, and a controller configured to perform a control of a cylinder of at least one shaft of the attachment so as to suppress a vibration of the traveling body or the upper turning body, which is caused by an aerial operation of the attachment.
Claims15
An excavator comprising:
- a traveling body;
- an upper turning body rotatably provided on the traveling body;
- an attachment which has a boom, an arm, and a bucket and is attached to the upper turning body;
- a plurality of cylinders that drive the attachment;
- a hydraulic circuit that is connected to each of the plurality of cylinders and supplies oil to the cylinder in accordance with an amount of control;
- a controller that controls the hydraulic circuit such that the cylinder absorbs an overturning moment produced due to a change in a moment of inertia of the attachment and applied from the attachment to the upper turning body,
- wherein the controller is structured to determine whether an aerial operation or digging work is being performed based on any one of distal position of the attachment, a pressure of a hydraulic pump or a pressure of each cylinder, and an input to an operation lever, and
- when the determination is made that the aerial operation is being performed, the controller performs said control.
5 more elements
An excavator comprising:
- a traveling body;
- an upper turning body rotatably provided on the traveling body;
- an attachment which has a boom, an arm, and a bucket and is attached to the upper turning body;
- a boom cylinder that drives the boom;
- an arm cylinder that drives the arm;
- a bucket cylinder that drives the bucket;
- a hydraulic circuit that is connected to the boom cylinder, the arm cylinder and the bucket cylinder and supplies oil to the cylinders in accordance with an amount of control;
- and
- a controller that controls the hydraulic circuit such that the boom cylinder absorbs an overturning moment produced due to a change in a moment of inertia of the attachment and applied from the attachment to the upper turning body,
- wherein the controller performs said control when the boom cylinder is not operated and the arm cylinder and the bucket cylinder are operated.
7 more elements
An excavator comprising:
- a traveling body;
- an upper turning body rotatably provided on the traveling body;
- an attachment which has a boom, an arm, and a bucket and is attached to the upper turning body;
- a plurality of cylinders that drive the attachment;
- a hydraulic circuit that is connected to each of the plurality of cylinders and supplies oil to the cylinder in accordance with an amount of control;
- and
- a controller that controls the hydraulic circuit such that the cylinder absorbs an overturning moment produced due to a change in a moment of inertia of the attachment and applied from the attachment to the upper turning body,
- wherein the controller performs said control when earth removal is performed, and wherein the earth removal is a movement from a state where the bucket and the arm are closed, the boom is raised, and the bucket accommodates a load, to a state where the bucket and the arm is widely opened so that the load is discharged.
5 more elements
Dependencies are inferred from the claim text.