Back to results
US 12,637,826 B2Granted
Working machine
AssigneeKubota Corporation
InventorKazuyuki Hatta
Life of this patent
Estimating the term…
Abstract
A boom is configured such that, when the boom is in its fully raised position, a first section between an intermediate portion and a boom proximal portion extends upward from the boom proximal portion toward the intermediate portion and a second section between the intermediate portion and a boom distal portion extends diagonally forward and upward from the intermediate portion, and that a first straight line orthogonal to an arm support shaft and to a first cylinder support shaft and extending downward from the first cylinder support shaft passes forward of a machine body.
Claims11
A single-arm working machine comprising:
- a machine body;
- one support bracket provided at a front portion of the machine body;
- one boom support attached to the support bracket so as to be able to swing about a swing axis extending in an up-down direction;
- one boom to swing upward and downward about a boom support shaft, the boom including a boom proximal portion pivotally supported on the boom support via the boom support shaft, a boom distal portion to pivotally support an arm via an arm support shaft such that the arm is swingable, and a boom body portion bent at an intermediate portion in a longitudinal direction of the boom, the boom body portion being a portion between the boom proximal portion and the boom distal portion;
- and a boom cylinder to extend and retract to cause the boom to swing, the boom cylinder being located on a front side of the boom and including a first end pivotally supported on a front side of the boom body portion via a first cylinder support shaft and a second end pivotally supported on the boom support via a second cylinder support shaft;
- wherein
- the boom is configured such that a bend angle does not change when the boom swings upward and downward about the boom support shaft, the bend angle being an angle between a front surface of a first section that is between the intermediate portion and the boom proximal portion, and a front surface of a second section that is between the intermediate portion and the boom distal portion;
- and
- the boom is further configured such that, when the boom is in a fully raised position thereof, a first straight line orthogonal to the arm support shaft and to the first cylinder support shaft and extending downward from the first cylinder support shaft passes rearward of a rear end of the boom support, and that the first section extends upward from the boom proximal portion toward the intermediate portion and the second section extends diagonally forward and upward from the intermediate portion, and that the first straight line passes forward of the machine body.
6 more elements
A working machine comprising:
- a machine body;
- a boom support located forward of the machine body;
- a boom to swing upward and downward about a boom support shaft, the boom including a boom proximal portion pivotally supported on the boom support via the boom support shaft, a boom distal portion to pivotally support an arm via an arm support shaft such that the arm is swingable, and a boom body portion bent at an intermediate portion in a longitudinal direction of the boom, the boom body portion being a portion between the boom proximal portion and the boom distal portion;
- and
- a boom cylinder to extend and retract to cause the boom to swing, the boom cylinder being located on a front side of the boom and including a first end pivotally supported on a front side of the boom body portion via a first cylinder support shaft and a second end pivotally supported on the boom support via a second cylinder support shaft;
- wherein,
- the boom is configured such that, when the boom is in a fully raised position thereof, a first section between the intermediate portion and the boom proximal portion extends upward from the boom proximal portion toward the intermediate portion and a second section between the intermediate portion and the boom distal portion extends diagonally forward and upward from the intermediate portion, and that a first straight line orthogonal to the arm support shaft and to the first cylinder support shaft and extending downward from the first cylinder support shaft passes forward of the machine body, and
- when the boom is in the fully raised position,
- a fifth distance between a fifth intersection and a sixth intersection is smaller than a sixth distance between an axis of the arm support shaft and the fifth intersection, and
- where the fifth intersection is an intersection of a fourth straight line and a fifth straight line, the sixth intersection is an intersection of the fifth straight line and a back surface of the boom body portion, the fourth straight line is a vertical line orthogonal to the arm support shaft, and the fifth straight line is a straight line orthogonal to the fourth straight line and to the first cylinder support shaft.
7 more elements
A working machine comprising:
- a machine body;
- a boom support located forward of the machine body;
- a boom to swing upward and downward about a boom support shaft, the boom including a boom proximal portion pivotally supported on the boom support via the boom support shaft, a boom distal portion to pivotally support an arm via an arm support shaft such that the arm is swingable, and a boom body portion bent at an intermediate portion in a longitudinal direction of the boom, the boom body portion being a portion between the boom proximal portion and the boom distal portion;
- and
- a boom cylinder to extend and retract to cause the boom to swing, the boom cylinder being located on a front side of the boom and including a first end pivotally supported on a front side of the boom body portion via a first cylinder support shaft and a second end pivotally supported on the boom support via a second cylinder support shaft;
- wherein
- the boom is configured such that, when the boom is in a fully raised position thereof, a first section between the intermediate portion and the boom proximal portion extends upward from the boom proximal portion toward the intermediate portion and a second section between the intermediate portion and the boom distal portion extends diagonally forward and upward from the intermediate portion, and that a first straight line orthogonal to the arm support shaft and to the first cylinder support shaft and extending downward from the first cylinder support shaft passes forward of the machine body, and
- the boom proximal portion includes a pivotal support section pivotally supported via the boom support shaft and a connected section connected to the first section of the boom body portion, and the boom proximal portion is bent at a location between the pivotal support section and the connected section such that, when the boom is in the fully raised position, the pivotal support section extends in a diagonally rearward and upward direction from the boom support shaft and the connected section extends upward from the pivotal support section.
5 more elements
Dependencies are inferred from the claim text.