Implement braking system
AssigneeDoosan Bobcat North America, Inc.
InventorsCody Erhardt, Daniel J. Krieger, William Jacobson
Life of this patent
Estimating the term…
Abstract
A power machine can include a frame, a power source, a machine hydraulic system, and a rotary implement removably securable to the frame. The machine hydraulic system can provide operational hydraulic power to a hydraulic motor of the rotary implement through an implement hydraulic circuit. In an implement braking mode, flow of hydraulic fluid through the implement hydraulic circuit can provide braking for the hydraulic motor.
Claims20
A hydraulic-powered rotary implement configured to be attached to a power machine, the rotary implement comprising:
- a hydraulic motor having a motor inlet and a motor outlet;
- and
- an implement hydraulic circuit in fluid communication with the motor inlet and the motor outlet, the implement hydraulic circuit having a first interface hydraulic port and a second interface hydraulic port configured to be removably secured in fluid communication with a hydraulic system of a power machine to provide flow into the implement hydraulic circuit from the power machine and flow from the implement hydraulic circuit to the power machine;
- wherein the implement hydraulic circuit:
- in an operating configuration, routes a driving hydraulic flow, received at one of the first interface hydraulic port or the second interface hydraulic port, through the hydraulic motor to drive the hydraulic motor;
- and
- in a braking configuration, routes a braking hydraulic flow, received at one of the first interface hydraulic port or the second interface hydraulic port, from the power machine through the hydraulic motor to brake the hydraulic motor.
A method of operating a hydraulic-powered rotary implement that is attached to a power machine, the method comprising:
- with an implement hydraulic circuit of the rotary implement in an operating configuration, powering rotation of a hydraulic motor of the rotary implement by providing a driving hydraulic flow from a power machine hydraulic system to the implement hydraulic circuit via one of a first interface hydraulic port or a second interface hydraulic port that provide hydraulic communication between the implement hydraulic circuit and the power machine hydraulic system;
- and
- with the implement hydraulic circuit in a braking configuration, braking rotation of the hydraulic motor by providing a braking hydraulic flow from the power machine hydraulic system to the implement hydraulic circuit via one of the first interface hydraulic port or the second interface hydraulic port, the braking hydraulic flow returning from the implement hydraulic circuit to the power machine hydraulic system to be cooled by a hydraulic cooler of the power machine.
A hydraulic-powered rotary implement for a power machine, the rotary implement comprising:
- a hydraulic motor having a motor inlet and a motor outlet;
- and
- an implement hydraulic circuit providing hydraulic communication between (i) a first interface hydraulic port for flow to or from a power machine hydraulic system of the power machine and (ii) a second interface hydraulic port for flow to or from the power machine hydraulic system, the first and second interface hydraulic ports being fluidically coupled to the motor inlet and the motor outlet for flow between the power machine hydraulic system, the motor inlet, and the motor outlet and configured to be removably secured to the power machine hydraulic system of the power machine;
- wherein the implement hydraulic circuit includes a braking flow circuit that provides fluid communication:
- between the motor outlet and an inlet of a brake valve of the implement hydraulic circuit;
- between an outlet of the brake valve and the motor inlet;
- and between the outlet of the brake valve and the first interface hydraulic port for outflow from the implement hydraulic circuit to the power machine hydraulic system.
Dependencies are inferred from the claim text.