Systems and methods for leveling and oscillation control of a lift device
AssigneeOshkosh Corporation
InventorsIgnacy Puszkiewicz, Gregory S. Brulo
Life of this patent
Estimating the term…
Abstract
A leveling system for a lift device includes an axle, a pin, a cradle, and a chassis. The axle is configured to rotatably couple with one or more tractive elements. The pin extends through a bore of the axle. The cradle is pivotally coupled with the pin. The chassis is pivotally coupled with the pin and includes a first actuator and a second actuator. The first actuator and the second actuator each include a body and a rod configured to extend relative to the body. The rods of the first actuator and the second actuator are configured to be extended to engage corresponding surfaces on opposite sides of the cradle. The cradle and the chassis are configured to rock in unison a limited angular amount relative to the axle.
Claims12
A leveling system for a lift device, the leveling system comprising:
- an axle configured to rotatably couple with one or more tractive elements;
- a pin extending through a bore of the axle;
- a chassis pivotally coupled with the axle through the pin, the chassis comprising an actuator coupled at a first end with the axle and a second end with the chassis;
- a strain gauge configured to measure a load at the axle due to rotation of the chassis about the pin;
- a controller configured to control the actuator to extend or retract to adjust an orientation of the chassis about the axle based on the load measured by the strain gauge;
- and
- a cradle, wherein the actuator is configured to operate to extend or retract to level the chassis relative to the cradle without adjusting a relative angular orientation between the cradle and the axle,
- wherein a first end of the cradle directly contacts a first corresponding surface of the axle when the cradle rocks to the first angular orientation relative to the axle, and a second end of the cradle directly contacts a second corresponding surface of the axle when the cradle rocks to a second angular orientation relative to the axle.
A lift device, comprising:
- an axle configured to rotatably couple with one or more tractive elements;
- a pin extending through a bore of the axle;
- a chassis pivotally coupled with the axle through the pin, the chassis comprising an actuator coupled at a first end with the axle and a second end with the chassis;
- a strain gauge configured to measure a load at the axle due to rotation of the chassis about the pin;
- a controller configured to control the actuator to extend or retract to adjust an orientation of the chassis about the axle based on the load measured by the strain gauge;
- and
- a cradle, wherein the actuator is configured to operate to extend or retract to level the chassis relative to the cradle without adjusting a relative angular orientation between the cradle and the axle;
- wherein a first end of the cradle directly contacts a first corresponding surface of the axle when the cradle rocks to the first angular orientation relative to the axle, and a second end of the cradle directly contacts a second corresponding surface of the axle when the cradle rocks to a second angular orientation relative to the axle.
Dependencies are inferred from the claim text.