Komatsu Corporation

Kenichi Higuchi

Tsuyoshi Yoshida

Akira Hashimoto

Daijiro Ito

Takuya Tsukada

Takanori Nagata

Daijirou Itou

Hisao Asada

Kouzou Ishida

Masakuni Ueda

An edge of a guide hole includes a first contact portion, a second contact portion, and a guide portion. The first contact portion is in contact with the second connecting pin while the second connecting pin is positioned in the lock actuation position. The second contact portion is in contact with the second connecting pin while the second connecting pin is positioned in the lock release position. The guide portion extends in a direction intersecting the movement direction of the second connecting pin between the first contact portion and the second contact portion. The guide portion is pressed by the second connecting pin that moves from the lock actuation position to the lock release position in order to resist the urging force of an urging member and cause the second lock member to move from the locked position to the unlocked position.

Quick coupler

A quick coupler includes a coupler body having a first hook, a lock member, a slidable second hook, a hydraulic cylinder, and a connecting pin connecting the cylinder and coupler body. The lock member is movable between locking and unlocking positions in which the lock member protrudes into and retracts from an opening of the first hook. The cylinder includes first and second end portions connected to the coupler body and the second hook, respectively. The cylinder extends and contracts to cause the second hook to slide away from and towards the first hook, respectively. The coupler body includes a support hole moveably supporting the connecting pin in an extension and contraction direction of the cylinder. The first end portion of the cylinder moves away from the second end portion within a movability range of the connecting pin to move the lock member from the unlocking to locking position.

A bottom surface part of a bucket includes first and second curved surface parts. The second curved surface part is positioned closer to a back surface part than the first curved surface part. A second curvature radius of the second curved surface part is shorter than a first curvature radius of the first curved surface part. The center of the first curvature radius is positioned to the outside of a main bucket body when viewed from the side. In a horizontal state, the first curved surface part is arranged along or above a reference curved surface when viewed from the side. A connecting part between the first curved surface part and the second curved surface part is positioned more towards a lip part than the portion of the bottom surface part that is positioned lowest in the bottom surface part in the horizontal state when viewed from the side.

Bucket and work vehicle

Growing community of inventors

Hirakata, Japan

Kenichi Higuchi