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US 6,957,705 B2Granted
Loader linkage
AssigneeDeere & Company
InventorsDavid Michael O'Brien, Gregory Keith Werner, Michael Dean Worley, George Madsen Robertson, Dusan John Hvolka
Life of this patent
Estimating the term…
Abstract
A Z-bar loader linkage having a floating bell crank. A boom is pivotally mounted to a loader frame at one end and an attachment at the other end. The bell crank is pivotally mounted on leveling links extending forwardly from the loader frame. The drive end of the bell crank is provided with an attachment link that extends from the bell crank to the attachment for controlling the angular position of the attachment. A guide link extends between the attachment link and the boom.
Claims23
A loader linkage comprising:
- a loader frame;
- a boom having a loader end and an attachment end, a middle portion being located between the loader and attachment ends, the loader end of the boom being pivotally coupled to the loader frame by a boom pivot;
- an attachment is pivotally coupled to the attachment end of the boom and having an angular position relative to the boom;
- an attachment tilt linkage controls the angular position of the attachment relative to the boom, the attachment tilt linkage comprises a leveling link having a first end that is pivotally coupled to the loader frame by a leveling link pivot and a second end, a bell crank having a drive end and a driven end, the bell crank is pivotally coupled to the second end of the leveling link by a bell crank pivot located between the drive end and the driven end, a linear actuator extends between the loader frame and the driven end of the bell crank for pivoting the bell crank about the bell crank pivot, an attachment link is pivotally coupled to the drive end of the bell crank and extends to the attachment for controlling the angular position of the attachment relative to the boom.
1 more element
A work vehicle for performing a work operation, the work vehicle comprising:
- a frame:
- ground engaging means for supporting and propelling the frame;
- a mast extending upwardly from the frame;
- a boom having a loader end and an attachment end, a middle portion being located between the loader and attachment ends, the loader end of the boom being pivotally coupled to the loader frame by a boom pivot;
- an attachment is pivotally coupled to the attachment end of the boom and having an angular position relative to the boom;
- an attachment tilt linkage controls the angular position of the attachment relative to the boom, the attachment tilt linkage comprises a leveling link having a first end that is pivotally coupled to the mast by a leveling link pivot and a second end, a bell crank having a drive end and a driven end, the bell crank is pivotally coupled to the second end of the leveling link by a bell crank pivot located between the drive end and the driven end, a linear actuator extends between the mast and the driven end of the bell crank for pivoting the bell crank about the bell crank pivot, an attachment link is pivotally coupled to the drive end of the bell crank and extends to the attachment for controlling the angular position of the attachment relative to the boom.
3 more elements
A loader linkage comprising:
- a loader frame;
- a boom having a loader end and an attachment end, a middle portion being located between the loader and attachment ends, the loader end of the boom being pivotally coupled to the loader frame by a boom pivot;
- an attachment is pivotally coupled to the attachment end of the boom and having an angular position relative to the boom;
- an attachment tilt linkage controls the angular position of the attachment relative to the boom, the attachment tilt linkage comprises a floating bell crank and a leveling link, the floating bell crank pivotally coupled to the loader frame via the leveling link independent of the boom, the floating bell crank having drive end and a driven end, a linear actuator extends between the loader frame and the driven end of the floating bell crank for pivoting the floating bell crank, an attachment link is pivotally coupled to the drive end of the floating bell crank and extends to the attachment for controlling the angular position of the attachment relative to the boom.
1 more element
A work vehicle for performing a work operation, the work vehicle comprising:
- a frame:
- ground engaging means for supporting and propelling the frame;
- a mast extending upwardly from the frame;
- a boom having a loader end and an attachment end, a middle portion being located between the loader and attachment ends, the loader end of the boom being pivotally coupled to the loader frame by a boom pivot;
- an attachment is pivotally coupled to the attachment end of the boom and having an angular position relative to the boom;
- an attachment tilt linkage controls the angular position of the attachment relative to the boom, the attachment tilt linkage comprises a floating bell crank and a leveling link, the floating bell crank pivotally coupled to the loader frame via the leveling link independent of the boom, the floating bell crank having a drive end and a driven end, a linear actuator extends between the loader frame and the driven end of the floating bell crank for pivoting the floating bell crank, an attachment link is pivotally coupled to the drive end of the floating bell crank and extends to the attachment for controlling the angular position of the attachment relative to the boom.
3 more elements
A loader linkage comprising:
- a loader frame;
- a boom having a loader end and an attachment end, a middle portion being located between the loader and attachment ends, the loader end of the boom being pivotally coupled to the loader frame by a boom pivot;
- an attachment is pivotally coupled to the attachment end of the boom and having an angular position relative to the boom;
- an attachment tilt linkage controls the angular position of the attachment relative to the boom, the attachment tilt linkage comprises a floating bell crank and a leveling link, the floating bell crank pivotally coupled to the loader frame via the leveling link independent of the boom, the floating bell crank having drive end and a driven end, a linear actuator extends between the loader frame and the driven end of the floating bell crank for pivoting the floating bell crank, an attachment link is pivotally coupled to the drive end of the floating bell crank and extends to the attachment for controlling the angular position of the attachment relative to the boom;
- and
- a guide link that extends between the middle portion of the boom and the attachment link.
3 more elements
A work vehicle for performing a work operation, the work vehicle comprising:
- a frame:
- ground engaging means for supporting and propelling the frame;
- a mast extending upwardly from the frame;
- a boom having a loader end and an attachment end, a middle portion being located between the loader and attachment ends, the loader end of the boom being pivotally coupled to the loader frame by a boom pivot;
- an attachment is pivotally coupled to the attachment end of the boom and having an angular position relative to the boom;
- an attachment tilt linkage controls the angular position of the attachment relative to the boom, the attachment tilt linkage comprises a floating bell crank and a leveling link, the floating bell crank pivotally coupled to the loader frame via the leveling link independent of the boom, the floating bell crank having a drive end and a driven end, a linear actuator extends between the loader frame and the driven end of the floating bell crank for pivoting the floating bell crank, an attachment link is pivotally coupled to the drive end of the floating bell crank and extends to the attachment for controlling the angular position of the attachment relative to the boom;
- and
- a guide link that extends between the middle portion of the boom and the attachment link.
5 more elements
Dependencies are inferred from the claim text.