Caterpillar Sarl

Yasunori Komatsubara

Kazufumi Nishimoto

Seiji Iijima

Naoki Miyata

Yuma Yabuki

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.

Growing community of inventors

Akashi, Japan

Yasunori Komatsubara