Hitachi Construction Machinery Co., Ltd.

Hitachi Construction Machinery Tierra Co., Ltd.

Yohei Iwamoto

Junya Kawamoto

Hiroshi Tabeta

Osamu Kokuryou

Yasuhiro Miyahara

Osamu Kokuryo

Daisuke Yamamoto

An engine cover () is provided between a counterweight () and a rear surface part (B) of a cab () to be capable of opening/closing in an upper-lower direction and a heat exchanger cover () is provided between the rear side of a left side surface part (C) and a right side surface part (D) of the cab () and a revolving frame (). The heat exchanger cover () is formed of a horizontal-opening structure of being rotatable in a front-rear direction to the revolving frame () with a front end (C) in the front-rear direction as a fulcrum and a rear end (D) in the front-rear direction as a free end. A heat exchanger cover lock mechanism () is provided on the rear end side of the heat exchanger cover () to hold the heat exchanger cover () in a closed state, and in a state where both the heat exchanger cover () and the engine cover () are closed, the engine cover () covers the rear end (D) of the heat exchanger cover () and the heat exchanger cover lock mechanism () from backward.

Small-sized construction machine with heat exchanger cover

A compact excavator includes: a swing post which is attached to a upperstructure and which can swing in a left/right direction, a working device which is attached to the swing post and which includes a boom cylinder, a counterweight, and hydraulic hoses which extend upwards between opposite side plates of the swing post, and through which pressure oil for driving the boom cylinder of the working device is guided. The compact excavator further includes a guide plate which is provided in the swing post, and which guides the hydraulic hoses downwards while restricting the hydraulic hoses from moving to approach a handrail when the hydraulic hoses attempt to expand toward the handrail due to driving of the working device.

Construction equipment

Disclosed is a construction machine that enables an operator to operate a vehicle width changing control lever while visually confirming positions of crawlers. The construction machine includes a lower track structurewhose left and right crawler track devicesA andB are adapted to change in spatial interval, and an upper swing structureswingably mounted above the lower track structure. The construction machine further includes a hydraulically actuated cylinder for changing vehicle width, disposed between the left and right crawler track devices, the vehicle width changing cylinder changing the interval between the left and right crawler track devices upon supply and discharge of a hydraulic fluid being controlled by a vehicle width changing control valve, and a vehicle width changing control leverdisposed on a left section of a swing body support structurerelative to an operator's seat, the vehicle width changing control lever operating the vehicle width changing control valve.

Construction machine

A control valve block is mounted on a bottom plate of a revolving frame through a control valve block mounting plate. In this case, a left support member and a right support member are provided on a back surface of the control valve block mounting plate at two spots with equal distances sandwiching a center position of gravity (G) of the control valve block. The left and right support members are mounted on a support beam provided on the bottom plate of the revolving frame. On the other hand, a weight-reducing part is provided at a part in the bottom plate of the revolving frame away from the support beam. The control valve block which is a heavy article is stably supported on the bottom plate at two spots sandwiching its center position of gravity (G). Moreover, the weight of the revolving frame can be reduced by the weight-reducing part.

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Shiga, Japan

Yohei Iwamoto