JP2018017033A5

JP2018017033A5 -

Info

Publication number: JP2018017033A5
Application number: JP2016148452A
Authority: JP
Filing date: 2016-07-28
Publication date: 2018-09-20
Anticipated expiration: 2036-07-28

Description

本発明が採用する構成の特徴は、前記旋回フレームのセンタフレームは、前記旋回輪取付孔群よりも左側で前記横板よりも前側が切欠かれた切欠部位となっており、前記左縦板よりも左側で前記横板よりも前側には、前記センタフレームと前記切欠部位の上側に位置する取付台上に制御弁群が取付けられている制御弁ユニットが設けられており、前記制御弁ユニットの上側位置には、前記カウンタウエイトとの間にオペレータが居住する居住領域が設けられており、前記上部旋回体の前記旋回中心、前記旋回モータおよび前記制御弁ユニットの重心位置を通る斜めの直線に沿うように前記切欠部位を左斜め前側に延びると共に基端側が前記センタフレームに取付けられ先端側が自由端となった傾斜フレームが設けられており、前記制御弁ユニットの前記取付台は、左前側部位が前記傾斜フレームに支持されたことにある。

A feature of the configuration adopted by the present invention is that the center frame of the swivel frame has a cut-out portion on the left side of the swivel wheel mounting hole group and a front side cut out of the horizontal plate. Further, a control valve unit having a control valve group mounted on a mounting base located above the center frame and the notch portion is provided on the left side and in front of the horizontal plate. In the upper position, a living area where an operator lives is provided between the counterweight and an oblique straight line passing through the center of rotation of the upper swing body, the position of the center of gravity of the swing motor and the control valve unit. An inclined frame is provided that extends obliquely to the left front side of the cutout portion and is attached to the center frame on the base end side and has a free end on the front end side. The mount of the bets is to the left front side portion is supported on the inclined frame.

Claims

A lower traveling body, an upper revolving body supported by the lower traveling body via a revolving device, an offset front device provided on the upper revolving body so as to be able to be lifted and lowered, and a rear side of the upper revolving body. Counter weight for balancing the weight of the offset front device,
The revolving frame of the upper revolving structure is
A center frame to which a turning wheel of the turning device is attached;
Left and right vertical plates having brackets that are erected on the center frame and are mounted on the front side with the offset front device attached to the right side of the turning center of the upper swing body;
A lateral plate that is located on the rear side of the turning center of the upper swing body and extends to the left side of the left vertical plate;
A swivel wheel mounting hole group for mounting the swivel wheel of the swivel device arranged in a circle around the swivel center in the center frame;
A turning motor insertion hole that is spaced from the left vertical plate to the left side inside the circle formed by the turning wheel mounting hole group to pass through the turning motor of the turning device, and is formed in front of the turning center;
A swing motor mounting seat which surrounds the swing motor insertion hole and is fixed on the center frame and to which the swing motor is mounted;
The upper swing body and the offset front device are, in an ultra-small swing type small hydraulic excavator capable of swinging within a vehicle width of the lower traveling body,
The center frame of the swivel frame is a cutout portion in which the front side of the horizontal plate is cut out on the left side of the swivel wheel mounting hole group,
On the left side of the left vertical plate and on the front side of the horizontal plate, a control valve unit is provided in which a control valve group is mounted on a mounting base located above the center frame and the notch portion,
In the upper position of the control valve unit, a living area where an operator lives is provided between the counterweight,
The notched portion extends obliquely to the left front side along a diagonal line passing through the center of rotation of the upper swing body, the center of gravity of the swing motor and the control valve unit, and the base end side is attached to the center frame and the tip end side is An inclined frame that is a free end is provided,
A small hydraulic excavator, wherein the mounting base of the control valve unit has a left front side portion supported by the inclined frame.

The swing motor mounting seat of the center frame is a rectangular plate having a swing motor mounting hole communicating with the swing motor insertion hole, and the swing motor mounting seat is a tangent of a circle formed by the swivel wheel mounting hole group. The small-sized hydraulic excavator according to claim 1, wherein the excavator is arranged so that its direction is long.

In addition to the inclined frame, the swivel frame includes a right front frame extending forward from the center frame along the left vertical plate, and a vicinity of a proximal end portion of the inclined frame spaced from the right front frame to the left side. A left front frame extending forward from the left frame and a left rear frame extending left from the center frame along the horizontal plate,
The small hydraulic excavator according to claim 1, wherein the right front frame, the left front frame, and the left rear frame support the mounting base of the control valve unit together with the inclined frame.

An engine is provided on the swivel frame on the front side of the counterweight,
The swivel frame covers the engine between the horizontal plate and the counterweight before passing through the swivel center of the upper swivel body and extending to a position in the vicinity of the left vertical plate beyond the center line in the rear direction. A driver's seat pedestal is provided in the state,
On the front side of the driver seat pedestal, a footrest member is provided on the upper side of the control valve unit,
The small excavator according to claim 1, wherein the living area is formed by the driver seat base and the footrest member.