Caterpillar Sarl

Naoki Miyata

Kazufumi Nishimoto

Hiroya Ito

Seiji Iijima

Kota Tatsumi

Toru Amaya

Hirokazu Koga

Yasunori Komatsubara

Tetsuya Koshima

Yuma Yabuki

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

To provide a bearing device which can ensure the sealing performance by using floating seal to eliminate the need of adding lubricant over a long term and a construction machine comprising the bearing device. The bearing device comprises a shaft. The bearing device comprises a boss portion having a bearing rotatably holding the shaft. The bearing device comprises a cylindrical collar mounted on an end part side of the shaft rather than the boss portion. The bearing device comprises a floating seal for sealing lubricant sandwiched between the boss portion and collar. The bearing device comprises a pin being inserted into the insertion holes provided in the shaft and collar and integrally fixing the shaft and collar at a position where a predetermined axial load is applied to the floating seal between the collar and boss portion. The bearing device comprises a bracket having an opening for mounting the collar.

Bearing device and construction machine

A bearing device that includes a large-diameter section that is provided on a shaft and regulates an axial position of a collar relative to the shaft. The bearing device has a bearing that rotatably retains the shaft at a position outside of a boss section, and has a cylindrical bearing member opposed to the opposing section of the collar at one end. The bearing device includes a floating seal for sealing a lubricant which is sandwiched between the opposing section of the collar and the one end of the bearing member. The bearing device includes a mounting member mounted to the end of the shaft and positioned on the other end of the bearing member to regulate the axial position of the bearing relative to the shaft.

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Akashi, Japan

Naoki Miyata