Yanmar Co., Ltd.

Syoubu Aramaki

Hayato Tsuji

Kunihiko Sakamoto

Seiji Sakada

Yousuke Yamashita

Kouichi Takata

Yasuo Tokieda

In the conventional connection and fixture part between a working vehicle and an excavator, a connection pin is made to contact a guide plate to be fixed in position, thereby requiring a high rigidity of the guide plate, accuracy of recreation of positioning of the connection pin, and high cost for manufacturing the guide plate. Thus, a guide plate of a connection portion has a chevron-shaped introduction part including two sector curves. A U-shaped bent member serving as a knob is provided on a rear side surface of a connection pin in the axial direction of the connection pin, so that the proper position of the inserted connection pin is defined as the position thereof when tips of the knob come into contact with the insertion-target member.

Fixing structure of work machine

A lock device is improved in durability by operating the operation member of a boom lock device in a non-contact state to solve a problem in a conventional work machine because there is a problem that the operation member is worn at the lateral rotating part of a boom bracket. In the lock devicefor locking a boomof the excavating device to the main body, an engaging member is provided on one of the boom and a boom bracketprovided on the main body, and an engaged member is provided on the other of the boom and the boom bracket. The engaging member is constituted by a plate formed on one side thereof with a hook part, and on the other side thereof with a slot. A support pinis inserted into the slot, and a stoppedis disposed above the support pin, so that the support pinand the stoppersupport the engaging member.

Lock device of work machine

Growing community of inventors

Chikugo, Japan

Syoubu Aramaki