Hitachi Construction Machinery Co., Ltd.

Hitachi Construction Machinery Tierra Co., Ltd.

Shogo Kimura

Tomoyuki Tanaka

Hiroshi Tabeta

Hajime Ishii

Shigeru Hirasawa

Shigehisa Hagura

Tomoyuki Miyata

Yasuo Ooshima

Kazuhiko Hiraoka

Hajime Yoshida

Masayuki Yunoue

Teruo Irino

Akira Saito

Hiroki Tanaka

Naoki Takeoka

Hiroshi Kanai

An operator's seat mounting section () that is positioned in back side of a floor member () includes a seat plate (D) for mounting an operator's seat () and an equipment mounting part (F) that rises upward from the right side of the seat plate (D), and a right operating lever assembly () is provided in front of the equipment mounting part (F). A controller accommodating space () is provided to be positioned in back side of a console (A) of the right operating lever assembly () and between a side surface (F) of the equipment mounting part (F) of the operator's seat mounting section () and the operator's seat (), and a controller () is mounted in the controller accommodating space () to control various kinds of electric equipment.

Construction machine

An upper revolving structure () includes a revolving frame (), a floor member () which is provided on the revolving frame () and a front side of which serves as a footrest section () on which an operator rests his or her feet, a cab box () which forms an operating room () above the floor member (), and an indoor unit () disposed on the floor member () to supply sucked air as conditioned air. A lower surface (B) side of the footrest section () of the floor member () is formed as a unit mounting surface (), and, as for the indoor unit (), a box body () is disposed on the lower side of the unit mounting surface () and, in this state, the box body () is mounted on the unit mounting surface () by means of a plurality of bolts ().

A floor member comprises a lever-pedal mounting part in a front side, an operator's seat mounting part in a rear side, an indoor unit mounting surface part on which an indoor unit is mounted under the operator's seat mounting part, an entrance surface part which is provided in a door side between the indoor unit mounting surface part and the lever-pedal mounting part and on which an operator places a foot at getting-in/off, and a foot rest part which is surrounded by the lever-pedal mounting part, the indoor unit mounting surface part and the entrance surface part. The indoor unit mounting surface part and the entrance surface part form a successive plane successively extending with each other in a position lower by one step than the lever-pedal mounting part and the foot rest part.

On a seat base () of a floor member (), a rear surface plate (C), an operator's seat mounting plate (D) on which an operator's seat () is mounted at a position higher than a footrest area () on which the foot is placed, and a duct accommodating space () formed in the vertical direction among the rear surface plate (C), the operator's seat mounting plate (D), and a rear position (B) of the footrest area () are provided. An indoor air inlet duct () having the front surface side opened as a filter fitting hole () and introducing air in an occupying space () toward an indoor unit () of an air-conditioning unit is provided on the duct accommodating space (). An indoor air filter () for catching dusts in the air is provided on the filter fitting hole () of the indoor air inlet duct ().

An upper revolving structure is provided with a revolving frame, a floor member, and a cab box. On this, an indoor unit for an air conditioner is provided on the floor member, and an outdoor air inlet port is provided by being opened to the outside of the cab box. An outdoor air duct is provided for supplying outdoor air introduced through the outdoor air inlet port toward the indoor unit. In this duct, an intermediate portion is arranged at a high position on the side of an operator's seat, and on this intermediate portion, a filter accommodating portion is provided by being opened into the cab box. In the filter accommodating portion, an outdoor air filter for trapping dusts in the outdoor air flowing through the outdoor air duct is accommodated capable of being attached and removed.

A cab () is provided with a cab box () in which a space between each of pillars (to) is covered by each of surfaces (A toF) and the inside becomes an operator's room (G) and a door () mounted on the left intermediate pillar (). On a rear surface portion (D) of the left front pillar (), a protruding portion (A) of a mounting plate (A) is provided in a state protruding to the door () side. On a mounting opening (E) on the inner surface side of the door (), a door holding member () engaged with an engaging member () and holding the door () at a closed position is provided. On the door (), a retreating recessed portion () for avoiding interference with the protruding portion (A) of the mounting plate (A) is provided on the front side from the door holding member ().

A canopy () is provided to rise in an upper revolving structure () for covering an upper side of an operator's seat (). A bend portion (B) extending in the left-right direction and projecting upward is provided in a front end side of a roof plate () in the canopy (). A plate-shaped left front lifting bracket () is provided in a left front connecting portion (J), and a plate-shaped right front lifting bracket () is provided in a right front connecting portion (L). The left and right front lifting brackets () sandwich the bend portion (B) from both sides in the left-right direction. Further, the left and right front lifting brackets () are provided with lifting holes (A,A) and also discharging notches (B,B).

Console for construction machine

Cab tilt device for a construction machine

Cover for operator cab interior for construction machine with console box

Hydraulic excavator

A seat support platform () is provided on a floor panel () of a floor member () of a cab (). An air conditioner unit () is installed internally of the seat support platform (). An under floor duct () is provided on the lower side surface (C) of the floor panel () to form an external air induction passage () to guide external air from outside of the cab () toward an external air intake port (H) of the air conditioner unit (). Under floor duct () can be provided integrally with the floor member () without protrusion to the lower side, and the under floor duct () can supply cool external air into the cab (). Even in the case of a small size hydraulic excavator, the under floor duct () can be provided integrally on the floor member () to secure broader space in the cab ().

A folding type door is fitted in a cab box. Two door panels and are disposed substantially in the same vertical plane as a left side cover of an upper revolving structure when said door in a closed position. Catches and are provided in a left rear side section of the cab box. Provided on door panels and of the folding type door are strikers and to be attachably or detachably engaged with the catches and separately of each other. When the folding type door is opened, the respective door panels and are each retained in an open door position by engagement of two sets of strikers and catches and which prevents rattling movements of each door panel to retain the folding type door in a stabilized state.

A lower floor panel () and an upper floor panel () which is having a sunken storage portion (D) is provided in front of a seat supporting base () which supports an operator's seat () with in a cab (). A storage space () is provided between a sunken storage portion (D) in the lower floor panel () and a flat horizontal surface (A) of the upper floor panel (). This storage space () can be used for installation of an air-conditioning unit (). This lo means that the air-conditioning unit () can be accommodated in a floor portion in front of the operator's seat (), permitting to suppress the height of the cab () to an appropriate level. In addition, installation of the air-conditioning unit () can make assembling and maintenance work far easier.

A washer tank is integrally formed with a front air duct, and the washer tank and the front air duct are installed within a cab. Thus, the washer tank can be installed within the cab by the use of spaces around the air duct. This arrangement makes it possible to install the washer tank within the cab in an unintrusive way and in the vicinity of a washer liquid spout nozzle without necessitating to provide an installation space exclusively for the washer tank.

Growing community of inventors

Ritto, Japan

Shogo Kimura