Caterpillar Sarl

Hirokazu Koga

Hiroya Ito

Naoki Miyata

Kazufumi Nishimoto

Kota Tatsumi

Toru Amaya

Tetsuya Koshima

Yusuke Kimura

Kunitomo Shimizu

Kenji Yokohata

Shuichi Takada

In a construction machine where an arm, a working attachment, and a distal end portion of an extensible cylinder are coupled via a power link and an idler link, to achieve protection of a grease feeding piping when the grease feeding piping is arranged in the idler link, and to ensure that the structure of the idler link is not complicated. In an idler link, there is formed a protruding part which protrudes in a direction opposite to a bucket from a link body part of the idler link; there is provided a grease feeding piping arrangement space which extends in a link length direction, toward right and left inside of right and left outer side faces of the protruding part, with at least either one side of the side opposite to the bucket or right and left inward sides open; and a grease feeding piping is arranged in the grease feeding piping arrangement space, in a state of not protruding in a direction opposite to the bucket beyond a protruding distal end portion face of the protruding part and not protruding toward right and left inside beyond right and left inner side link faces of the link body part.

Grease feeding piping arrangement structure in construction machine

A clearance adjusting member that easily attaches and detaches without risk of falling off a pin is disclosed. A first member and a second member are coupled freely to be rotated in relation to each other by a cylindrical pin. For adjusting an axial clearance between the two members, the clearance adjusting member comprises a shim in a U or C-shape attached to the pin in the axial clearance, and a restricting means for restricting the shim while being freely releasable. A restricted piece protruding radially outward is formed on an outer circumferential edge of the shim. The restricting means includes a pair of restricting pieces spacedly arranged circumferentially on the radially outer side of the pin. When the shim is inserted towards the axial clearance, the restricted piece becomes positioned between the pair of restricting pieces and the shim is attached to the pin.

Clearance adjusting member

A front linkage for a construction machine which can uniquely calculate the rotation angle of the work tool relative to the arm and which can prevent the angle detection device from being damaged by contact with the soil during digging. The front linkage has an arm, a first link pivotally connected at one end to the front end side of the arm, and at the other end to one end of a second link, and a work tool which is pivotally connected to the other end of the second link and which is pivotally connected to the arm in a further front end side than the one end portion of the first link. The first link is positioned outward along the outer width of the side wall of the arm. An angle detecting device for detecting the rotation angle of the first link relative to the arm may comprise a magnet disposed on an inner surface of the first link and a magnetic detector disposed on the side wall outer surface of the arm.

Working arm or a construction machine having angle detection

Growing community of inventors

Tokyo, Japan

Hirokazu Koga