Yanmar Co., Ltd.

Yanmar Construction Equipment Co., Ltd.

Seiji Sakada

Makiko Tajima

Kunihiko Sakamoto

Masaaki Yamashita

Hiroaki Ayabe

Yousuke Yamashita

Kouichi Takata

Nagahiro Ogata

Hiroyuki Ootsuki

Hayato Tsuji

Syoubu Aramaki

Hiroyuki Yanmar Co Ltd Ootsuki

A lift arm having a plate-like structure that is capable of taking a large load is realized without increasing a plate thickness and at low cost. The structure with required strength and of low cost is realized by a simple construction and achieves, at the same time, both weight lightening of a loader and sufficient load bearing performance. In a loader () of a working machine (), connection sections between a cross member () and lift arms () are each formed in a shape broadening from the cross member () toward a lift arm (). Further, reinforcement plates are attached to outer surfaces of a front loader () so as to overlap the connection sections between the cross member () and the lift arms (). Contact members () are attached to lower side faces at the heads of the lift arms () to restrict the amount of rotation of a working device installed on the heads of the lift arms ().

Loading device for working machine

There is provided a piping structure of a front work machine which prevents an increase in total with of the front work machine caused by hydraulic piping extended from the main machine side, and enables the piping following a structure of the front work machine turning vertically, by which a burden on the hydraulic piping accompanying the turning of the front work machine can be reduced to improve the durability.

Piping struture of front 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

A cylinder is interposed between a machine frame and each of outriggers, which are vertically swingably disposed at opposite sides of the machine frame, so as to lift up and down the outrigger. Fluid passages are formed in a rod part of the hydraulic cylinder. Connection portions of fluid suction and delivery ports of the respective fluid passages to be connected to the respective hydraulic pressure hoses are disposed adjacent to a pivot of the hydraulic cylinder.

Hydraulic cylinder of outrigger

A simple and compact loader having a sufficient strength with brackets fixed on a working vehicle. Lift arms are pivoted at one ends thereof to respective brackets so as to be vertically swung by respective lift arm cylinders. Attachments are vertically swingably supported on respective tip portions of the lift arms. Bucket links are connected to the respective attachments so as to transmit the telescopic action of bucket cylinders. Each of the bucket links is offset laterally from each of the lift arms. The middle portion of each of the lift arms is disposed above a straight line connecting both ends of the lift arm to each other, so as to ensure a space for arranging a steerable wheel under the lift arm.

Loading apparatus

Tractor

Growing community of inventors

Chikugo, Japan

Seiji Sakada