JPH10331192A - Revolving type construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the front visual field from a driver seat widely and prevent the heat emitted by a group of control valves from being conducted to the driver seat. SOLUTION: At the right front of a revolting frame 4, a valve accommodation chamber 24 is furnished as composed of a space 24A to accommodate valves and a rods accommodating space 24B positioned over the valve accommodation space 24A, and a group 26 of control valves are accommodated in this space 24A while rods to be connected to the valve group 26 are accommodated in the space 24B. Thereby the valve group 26 is prevented from protruding over the floor plate, and it is possible to secure the front visual field widely from the driver seat. It is also possible to prevent the heat in the valve accommodation chamber 24 from being conducted to the driver seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing type construction machine such as a hydraulic shovel, and more particularly to a swing type construction machine capable of making a small swing.

[0002]

2. Description of the Related Art In general, a hydraulic shovel or the like is known as a revolving construction machine. The hydraulic shovel includes a lower traveling body, an upper revolving body rotatably provided on the lower traveling body, and And a working device provided on the front side of the upper revolving superstructure.

[0003] Here, the upper revolving superstructure includes a revolving frame provided with a working device on the front side, a counter weight provided on the rear side of the revolving frame for balancing the working device, and a front side of the counterweight. The vehicle generally includes an engine mounted on the revolving frame, an engine cover for covering the engine, and a driver's seat positioned on the revolving frame in front of the engine cover.

In the engine cover, in addition to the engine, a hydraulic oil tank, a hydraulic pump driven by the engine, and hydraulic oil discharged from the hydraulic pump are supplied to a hydraulic excavator equipped with a hydraulic actuator (traveling motor, turning motor, etc.). A control valve group and the like for controlling supply and discharge are accommodated in a motor, a hydraulic cylinder of a working device, and the like.

[0005] By the way, hydraulic excavators include an in-vehicle turning type and an ultra-small turning type hydraulic excavator (hereinafter, referred to as a small turning type hydraulic excavator). In this small turning type hydraulic excavator, a machine room is defined. In order to make the engine cover as small as possible, a group of control valves is housed below a floor plate provided with a driver's seat.

However, since the control valve generates heat by supplying and discharging high-temperature pressure oil discharged from the hydraulic pump,
The hot air from the control valve group causes the surroundings of the driver's seat to become hot, which causes a problem that the working efficiency is reduced.
Another problem is that abnormal noise generated when the pressure oil flows through the control valve group becomes unpleasant noise and is transmitted to the driver's seat.

In order to solve such a problem, as another conventional technique, a hydraulic oil tank is disposed on a turning frame located at the right front side of a driver's seat, and is adjacent to the hydraulic oil tank and above a floor plate. 2. Description of the Related Art There is known a small turning hydraulic excavator having a configuration in which a control valve group is disposed in a state of protruding from a hydraulic valve.

[0008]

However, in the above-described other prior art hydraulic shovel, the control valve group moves the spool to the hydraulic oil tank in a state where the spool moves vertically (hereinafter, referred to as a vertical state). Since they are provided adjacent to each other, the control valve group is arranged to protrude significantly above the floor plate.

For this reason, the right front view of the worker sitting in the driver's seat is obstructed by a control valve group or the like protruding above the floor plate, which impairs workability during traveling or excavation work. There's a problem.

Further, since the control valve group is mounted vertically, a downward force due to its own weight always acts on the spool of each control valve constituting the control valve group, along the moving direction. There is a problem that the operation of the control valve group is adversely affected.

The present invention has been made in view of the above-mentioned problems of the prior art, and has a control valve group arranged at a front right position in a turning frame, thereby ensuring a wide front view from a driver's seat. It is an object of the present invention to provide a swing type construction machine that prevents hot air from a control valve group from being transmitted to a driver's seat.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a lower traveling body, an upper revolving body rotatably provided on the lower traveling body, and a front side of the upper revolving body. The present invention is applied to a swing type construction machine having the provided working device.

A feature of the first aspect of the present invention is that the upper revolving body has a bottom plate and a revolving frame having a driver's seat provided at a center portion, the revolving frame having a vertical plate standing on the bottom plate and extending in the front-rear direction. An engine mounted on the rear side of the turning frame to drive a hydraulic pump, a hydraulic oil tank provided on the turning frame at a right front side of the engine, and a front side with respect to the hydraulic oil tank. And a control valve group disposed in a space defined by a height dimension of a vertical plate of the revolving frame at a position on the right front side of the revolving frame.

[0014] With this configuration, the control valve group can be disposed in the space provided at the right front position of the turning frame, so that the right front view of the driver's seat is blocked by the control valve group. Can be prevented, and a wide front view from the driver's seat can be secured.

Further, the hot air from the control valve group is blocked by the vertical plate or the like of the turning frame, so that the hot air from the control valve group can be prevented from being transmitted to the driver's seat.

Further, according to the invention of claim 2, the undercarriage includes:
An upper revolving structure provided rotatably on the lower traveling structure,
In a revolving construction machine having a working device provided on the front side of the upper revolving structure, the upper revolving structure has a bottom plate and a vertical plate that is erected on the bottom plate and extends in the front-rear direction. A turning frame provided with a driver's seat, an engine mounted on the rear side of the turning frame and driving a hydraulic pump, and a hydraulic oil tank provided on the turning frame at a right front side of the engine, An engine cover provided from the rear side to the right side of the turning frame to cover the engine and the hydraulic oil tank; a floor plate covering the upper surface of the turning frame from the front side to the left and right front ends of the engine cover; The right side of the engine cover and the right front end of the floor panel are also covered at the right front position of the turning frame which is also the front side, and the height of the vertical plate of the turning frame is A valve chamber defined by law,
And a control valve group arranged in the valve storage chamber for controlling the supply and discharge of the pressure oil to and from the working device.

[0017] With this configuration, the control valve group can be disposed in the valve accommodating chamber provided at the right front position of the turning frame. Therefore, the right front view of the driver's seat is blocked by the control valve group. It is possible to prevent the driver's seat from being seen, and to secure a wide front view from the driver's seat.

Further, the hot air from the control valve group is blocked by the vertical plate of the turning frame, the engine cover, the floor plate, etc., so that the hot air from the control valve group can be prevented from being transmitted to the driver's seat.

Further, the invention according to claim 3 is characterized in that the control valve group is arranged horizontally in the turning frame.

With this configuration, the control valve group can be accommodated in the valve accommodating chamber with sufficient space together with the hydraulic hose connected to the control valve group, and the spool of each control valve constituting the control valve group has It is possible to prevent a downward force due to its own weight from acting on the moving direction.

According to a fourth aspect of the present invention, a lower corner cover and a lower side cover are provided at a right front position of the revolving frame, and an under cover is provided at a lower right position of the revolving frame. In addition to the engine cover and the floor panel, the lower corner cover, the lower side cover, and the under cover are configured so as to be closed.

With this configuration, the control valve group can be protected from earth and sand during traveling or excavation work by the engine cover, the floor panel, the lower corner cover, the lower side cover, and the under cover.

Further, according to the present invention, a vent for discharging hot air in the valve accommodating chamber to the outside is provided in one of the lower corner cover, the lower side cover and the under cover, or the lower side cover and the under cover. The configuration is provided between the cover and the cover.

With this configuration, the hot air in the valve chamber can be discharged to the outside through the ventilation port, and the outside air can be introduced into the valve chamber, so that the hot air in the valve chamber is transmitted to the driver's seat. It can be reliably prevented.

According to a sixth aspect of the present invention, in the valve accommodating space, the valve accommodating chamber is formed as a space within a range of a height from a bottom plate of the revolving frame to a vertical plate, and accommodates the control valve group. And a rod accommodation space formed as a space located above the valve accommodation space and accommodating rods connected to the control valve group.

With such a configuration, not only the control valve group but also the rods connected to the control valve group can be accommodated in the valve accommodation chamber provided at the right front side of the turning frame.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A small swing hydraulic excavator will be described as an example of a swing construction machine according to an embodiment of the present invention, and will be described in detail with reference to the accompanying drawings.

In the drawing, reference numeral 1 denotes a lower traveling body, 2 denotes an upper revolving body mounted on the lower traveling body 1 so as to be pivotable,
A working device 3 for performing excavation work or the like is provided on the front side of the upper swing body 2 so as to be able to move up and down.

Here, the upper swing body 2 includes a swing frame 4, a counterweight 9, an engine cover 11, which will be described later.
It is roughly composed of a driver's seat 13 and the like. As shown in FIG. 2, the upper swing body 2 is formed in a substantially circular shape when viewed from above, and the swing operation can be performed in a state where at least the counterweight 9 side is within the vehicle width of the lower running body 1. I have.

Reference numeral 4 denotes a revolving frame constituting a base of the upper revolving unit 2. The revolving frame 4 has a flat bottom plate 4A and an upright standing on the upper surface side of the bottom plate 4A as shown in FIG. Approximately composed of elongated vertical plates 4B, 4B, an upper plate 4C fixed to the upper end side of each vertical plate 4B, and a plurality of horizontal plates 4D, 4D,. The front ends of the bottom plate 4A, the vertical plates 4B and the upper plate 4C are
The bracket 4E supports the base end of the working device 3. Here, each vertical plate 4B is formed with a large height dimension H in the vertical direction (see FIG. 6).

Reference numeral 5 denotes an engine mounted on the rear side of the revolving frame 4. The engine 5 is disposed in a horizontal state extending in the left-right direction as shown in FIG. And
A hydraulic pump 6 driven by the engine 5 is attached to the left end of the engine 5, and supplies hydraulic oil to the lower traveling body 1, the working device 3, and the like. A radiator 7 and an oil cooler 8 are disposed on the right end side of the engine 5 in front of a cooling fan (not shown).

Reference numeral 9 denotes a counterweight provided on the rear side of the revolving frame 4 to balance the weight with the working device 3, and the counterweight 9 is formed in an arc shape by casting or the like. At this time, the counterweight 9 has its rear surface arc shape within a predetermined turning radius (within the vehicle width of the lower traveling body 1), so that the counterweight 9 having poor visibility from the driver's seat 13 interferes with an obstacle. Has been prevented.

Reference numeral 10 denotes a hydraulic oil tank which is disposed on the turning frame 4 at a position on the right side of the driver's seat 13. The hydraulic oil tank 10 comprises a hydraulic pump 6, a lower traveling unit 1, and a working device 3.
The hydraulic oil is supplied to and discharged from the storage device.

An engine cover 11 is provided from the rear side to the right side of the revolving frame 4 and covers the engine 5 and the like together with the counterweight 9. The engine cover 11 includes a back cover 11A provided on the back of the driver's seat 13; A rear cover 11B, which is usually provided as a bonnet, is provided on the rear side of the back cover 11A so as to be opened and closed, a left cover 11C provided on the left side of the driver's seat 13, and a hydraulic oil provided on the right side of the driver's seat 13. The right cover 11D covers the tank 10. The right cover 11D is formed of, for example, a resin material in order to obtain a lightweight and heat-insulating effect.

Reference numeral 12 denotes a floor plate (a portion indicated by oblique lines in FIG. 4) provided so as to cover the upper surface of the revolving frame 4 from the front side to the left and right front ends of the engine cover 11. The floor plate 12 is substantially flat as a whole. Is formed. here,
The floor panel 12 includes a central floor panel section 12A located on the front side of the back cover 11A of the engine cover 11, and a left floor panel section 12 located on the left side of the left cover 11C and having an outer periphery formed in an arc shape.
B and the right floor plate portion 12C located on the front side of the right cover 11D.
It is composed of

Reference numeral 13 denotes a floor plate 12 at a substantially central portion of the revolving frame 4 or at a position slightly shifted leftward with respect to the working device 3.
The driver's seat disposed on the central floor plate portion 12A is covered with a canopy 14 above the driver's seat 13.
In front of the driver's seat 13, a traveling operation lever 15 for operating the lower traveling body 1 is disposed, and on both left and right sides of the driver's seat 13, the turning operation of the upper revolving unit 2 and the working device 3 are provided. A work operation lever 16 and the like for controlling the operation of the work are provided.

Reference numerals 17 and 18 denote left and right lower front covers provided on the front of the revolving frame 4, respectively. The lower front covers 17 and 18 cover the front of the revolving frame 4.

Reference numerals 19 and 20 denote left and right lower corner covers provided at the corners of the revolving frame 4, respectively. The lower corner covers 19 and 20 are connected to the lower front covers 17 and 18 respectively. 4 covers the corners.

Reference numeral 21 denotes a left lower side cover provided on the left side surface of the revolving frame 4.
Is formed to have a substantially U-shaped cross section by bending a thin steel plate or the like.
And the lower corner cover 19 continuously covers the left side surface of the turning frame 4.

Reference numeral 22 denotes a right lower side cover provided on the right side of the revolving frame 4.
Is formed to have a substantially U-shaped cross section by bending a thin steel plate or the like.
And the lower corner cover 20 to cover the right side surface of the revolving frame 4.

Here, the lower corner cover 20 and the lower side cover 22 are detachably attached to the revolving frame 4 by bolts (not shown), and as shown in FIG. 22 turning frame 4
By exposing the control valve group 26 to be described later by removing the control valve group 26, maintenance, inspection work and the like of the control valve group 26 can be easily performed.

Reference numeral 23 denotes an undercover provided on the lower right side of the revolving frame 4.
Are mounted between the respective horizontal plates 4D of the revolving frame 4, as shown in FIG.

Numeral 24 designates a valve accommodating chamber provided at a position on the right front side of the revolving frame 4 which is on the front side of the hydraulic oil tank 10. The valve accommodating chamber 24 has a bottom plate of the revolving frame 4 as shown in FIG. A valve housing space 24A formed within the range of the height dimension H1 of the vertical plate 4B from 4A, and a vertical plate 4B located above the valve housing space 24A (above the upper plate 4C constituting the revolving frame 4). From the upper end of the floor plate 12 (right floor plate 12
C) and a rod-like accommodation space 24B formed in a range of a height dimension H2 up to the lower surface, and the height dimension H of the entire valve accommodation chamber 24 is set by the following equation (1).

[0044]

H = H1 + H2

As described above, the valve accommodating chamber 24 is provided at the right front position of the revolving frame 4 as a space defined by the height dimension H1 of the vertical plate 4B of the revolving frame 4.

The valve housing space 24A of the valve housing chamber 24
A control valve group 26 to be described later is accommodated therein, and a rod-like accommodation space 24B is connected to the control valve group 26 and operates in response to an operation on the traveling operation lever 15 and the work operation lever 16. , And a rod (not shown) for driving the motor.

Here, the valve accommodating chamber 24 is closed by a right cover 11D of the engine cover 11, a right floor plate portion 12C of the floor plate 12, a lower corner cover 20, a lower side cover 22, an under cover 23 and the like.

The valve chamber 24 is separated from the lower space of the driver's seat 13 by the vertical plate 4B of the revolving frame 4, and hot air from the control valve group 26 housed in the valve chamber 24 or The vertical plate 4B or the like can block transmission of abnormal noise or the like generated when the pressure oil flows through the control valve group 26 to the driver's seat 13.

Reference numeral 25 denotes a vent provided between the lower side cover 22 and the under cover 23.
The hot air in the valve accommodating chamber 24 is discharged to the outside, and the outside air is introduced into the valve accommodating chamber 24.

Reference numeral 26 denotes a control valve group mounted on the upper surface side of the under cover 23 and disposed in the valve housing space 24A of the valve housing chamber 24. The control valve group 26 (Multiple valves) including a large number of control valves and pilot valves for controlling the supply and discharge of the pressure oil discharged from the hydraulic pump 6 to the lower traveling body 1 and the working device 3 in response to the operation of the operating lever 16 Is configured as

Here, the control valve group 26 is in a state where the spool moves in the horizontal direction (hereinafter, referred to as a horizontal state).
As shown in FIG. 6, the height dimension h in the horizontal state is smaller than the height dimension H1 of the vertical plate 4B constituting the revolving frame 4, as shown in FIG.

As described above, the control valve group 26 is controlled by the control valve group 2
.. (Only two are shown) together with a plurality of hydraulic hoses 27, 27,... Connected to the valve housing space 24A in the valve housing space 24A. , Wires and the like are accommodated in the rod accommodation space 24B of the valve accommodation room 24 with a margin.

Further, by providing the control valve group 26 together with the oil cooler 8 and the hydraulic oil tank 10 so as to be located on the right side of the turning frame 4 so as to be arranged in the front-rear direction, the oil cooler 8, the hydraulic oil tank 10 and the control valve The configuration is such that the layout of the hydraulic hoses 27 connecting the groups 26 and the like can be simplified.

The small-swing hydraulic excavator according to the present embodiment has the above-described configuration. Next, the operation thereof will be described.

First, when the engine 5 operates, the pressure oil discharged from the hydraulic pump 6 is supplied to the control valve group 26,
The control valve group 26 supplies and discharges the lower traveling body 1, the working device 3, and the like according to the operation of the traveling operation lever 15 and the operation operation lever 16. This allows the lower traveling body 1 to travel in a desired direction and at a desired speed.
Thus, excavation work such as earth and sand can be performed.

At this time, the valve housing chamber 24 is
The space defined by the height H1 of the vertical plate 4B is provided on the right front side of the driver's seat 13 and is provided below the floor plate 12, and a control is provided in the valve housing space 24A of the valve housing chamber 24. The valve group 26 is accommodated with a sufficient space together with the plurality of hydraulic hoses 27, and various rods and wires connected to the control valve group 26 are accommodated in the rods accommodating space 24B. As a result, it is possible to reliably prevent the control valve group 26 and the like from protruding above the floor plate 12, secure a wide front view of the driver's seat 13, and improve workability during traveling and excavation work of the hydraulic shovel. can do.

On the other hand, the control valve group 26 generates heat due to the high-temperature pressure oil discharged from the hydraulic pump 6 and generates hot air in the valve housing chamber 24.
Is separated from the lower space of the driver's seat 13 by the vertical plate 4B and is covered with the engine cover 11, the floor plate 12, and the like. It can be shut off by the floor plate 12 and the like, and it is possible to reliably prevent the hot air in the valve housing chamber 24 from being transmitted to the driver's seat 13. Further, abnormal noise when the pressure oil flows through the control valve group 26 can also be blocked by the vertical plate 4B of the turning frame 4, the engine cover 11, the floor plate 12, and the like. As a result, the work environment around the driver's seat 13 can be maintained in a comfortable state, and work efficiency can be improved.

Further, since the control valve group 26 is arranged horizontally in the valve accommodating chamber 24, each control constituting the control valve group 26 is compared with a case where the control valve group is arranged vertically. It is possible to prevent a downward force due to its own weight from acting on the spool of the valve in the moving direction thereof.
Can be operated more smoothly.

Further, the valve housing chamber 24 is closed by the right cover 11D of the engine cover 11, the right floor panel 12C of the floor panel 12, the lower corner cover 20, the lower side cover 22, the under cover 23, and the like. Containment room 24
It is possible to reliably prevent the earth and sand and the like from colliding with the control valve group 26 disposed therein, thereby preventing the control valve group 26 from being damaged.

Further, since the ventilation port 25 is provided between the lower side cover 22 and the under cover 23, the valve accommodation chamber 24
While discharging the hot air inside through the vent 25,
Outside air can be introduced into the valve housing chamber 24. Thereby, it is possible to more effectively prevent the hot air in the valve housing chamber 24 from being transmitted to the driver's seat 13, and to avoid the deterioration of the hydraulic hose 27 and the like due to the hot air staying in the valve housing chamber 24. be able to.

In the embodiment described above, the valve chamber 24
Although the case where the ventilation hole 25 for discharging the hot air inside is provided between the lower side cover 22 and the under cover 23 has been illustrated, the present invention is not limited to this. For example, FIG. As in the modified example, a configuration may be adopted in which a vent 31 as shown by a two-dot chain line is provided in any of the lower corner cover 20, the lower side cover 22, and the under cover 23.

The shapes of the lower front cover 18, the lower corner cover 20, and the lower side cover 22 may be changed, for example, to facilitate the attachment and detachment work, or these three members may be integrated.

Furthermore, in the above-described embodiment, a canopy type excavator in which the canopy 14 is provided on the driver's seat 13 as the revolving construction machine has been described as an example, but the present invention is not limited to this. For example, the present invention may be applied to a cabin type excavator in which a driver's seat is covered by a cabin cover.

[0064]

As described above in detail, according to the first aspect of the present invention, the control valve group is arranged in the space defined by the height of the vertical plate of the revolving frame at the right front position of the revolving frame. In addition, a wide forward view from the driver's seat can be secured, and workability during traveling and excavation work can be improved. In addition, since the hot air from the control valve group is blocked by the vertical plate or the like of the turning frame, the hot air can be prevented from being transmitted to the driver's seat, and the working efficiency can be improved.

According to the second aspect of the present invention, the upper side is covered by the right side of the engine cover and the right front end of the floor panel at the right front position of the turning frame, and the valve is determined by the height of the vertical plate of the turning frame. Since the control valve group is arranged in the accommodation room, a wide front view from the driver's seat can be secured, and workability during traveling and excavation work can be improved. In addition, since the hot air from the control valve group arranged in the valve chamber is blocked by the vertical plate of the revolving frame, the engine cover, the floor plate, etc., it is possible to reliably prevent the hot air from being transmitted to the driver's seat. Can be improved.

Further, according to the third aspect of the present invention, the control valve group is arranged in the turning frame in a horizontal state, so that the control valve group is placed in the turning frame together with the hydraulic hose connected to the control valve group. Can be accommodated with plenty of time. Moreover,
Since it is possible to prevent a downward force due to its own weight from acting on the spool of each control valve constituting the control valve group in the moving direction, for example, compared to a case where the control valve group is arranged vertically, the control valve The group can be operated more smoothly.

According to the fourth aspect of the present invention, the lower accommodating cover and the lower side cover are provided at the right front side of the turning frame, and the under cover is provided at the lower right front portion of the turning frame. Was closed by the engine cover, floor panel, lower corner cover, lower side cover, and under cover, so that the control valve group arranged in the valve chamber was reliably prevented from colliding with soil and the like, and the control valve group was not damaged. Can be prevented.

Further, according to the fifth aspect of the present invention, the vent for discharging the hot air in the valve accommodating chamber to the outside is provided with one of the lower corner cover, the lower side cover, the under cover, or the lower side cover. By providing between the under cover and the under cover, the hot air in the valve accommodating chamber can be discharged to the outside through the vent, and the outside air can be introduced into the valve accommodating chamber. Thus, it is possible to more effectively prevent the hot air in the valve housing from being transmitted to the driver's seat, and to avoid deterioration of the hydraulic hose and the like due to the hot air staying in the valve housing.

According to the sixth aspect of the present invention, the valve housing space formed as a space within the height dimension of the vertical plate from the bottom plate of the revolving frame, and the space located above the valve housing space. Since the valve accommodating chamber is formed from the formed rod accommodating space, the control valve group is accommodated in the valve accommodating space, and the rods, hydraulic hoses, and the like connected to the control valve group are accommodated in the rod accommodating space. Can be accommodated. Thereby, not only the control valve group but also the rods connected to the control valve group can be accommodated in the valve accommodation room provided at the right front side of the revolving frame without protruding above the floor plate. A wide front view from the seat can be secured.

[Brief description of the drawings]

FIG. 1 is a front view showing a small turning hydraulic excavator according to an embodiment together with a working device.

FIG. 2 is a plan view showing a small turning hydraulic excavator according to the embodiment.

FIG. 3 is a plan view showing a turning frame.

FIG. 4 is a plan view showing the shape of a floor plate in a state where a driver's seat, a canopy, and the like are omitted.

FIG. 5 is a plan view showing an engine, a control valve group, and the like provided on the revolving frame with a floor plate removed.

FIG. 6 is an enlarged view of a main part of FIG. 1 showing a state in which a lower side cover is removed from a turning frame.

FIG. 7 is a plan view similar to FIG. 5, showing a modified example of a vent.

[Description of Signs] 4 Revolving frame 4A Bottom plate 4B Vertical plate 5 Engine 6 Hydraulic pump 11 Engine cover 12 Floor plate 13 Driver's seat 19, 20 Lower corner cover 21, 22 Lower side cover 23 Under cover 24 Valve accommodation room 24A Valve accommodation space 24B Rod storage space 25 Vent 26 Control valve group

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Teruo Irino 650 Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Within Hitachi Construction Machinery Engineering Co., Ltd. Inside the Tsuchiura Plant (72) Inventor Eiji Minamiyama 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture Inside the Tsuchiura Plant, Hitachi Construction Machinery Co., Ltd.

Claims (6)

[Claims] A revolving construction machine comprising: a lower traveling body; an upper revolving body rotatably provided on the lower traveling body; and a working device provided in front of the upper revolving body. The upper revolving structure is a revolving frame having a bottom plate and a vertical plate erected on the bottom plate and extending in the front-rear direction and provided with a driver's seat in the center, and mounted on the rear side of the revolving frame,
An engine for driving a hydraulic pump, a hydraulic oil tank provided on the revolving frame at a right front side of the engine, and a revolving frame at a right front position of the revolving frame at a front side of the hydraulic oil tank And a control valve group disposed in a space defined by the height of the vertical plate. 2. A revolving construction machine comprising: a lower traveling body; an upper revolving body rotatably provided on the lower traveling body; and a working device provided on a front side of the upper revolving body. The upper revolving structure is a revolving frame having a bottom plate and a vertical plate erected on the bottom plate and extending in the front-rear direction and provided with a driver's seat in the center, and mounted on the rear side of the revolving frame,
An engine for driving a hydraulic pump, a hydraulic oil tank located on the turning frame located on the right front side of the engine, and an engine provided from the rear side to the right side of the turning frame to cover the engine and the hydraulic oil tank A cover, a floor plate covering the upper surface of the turning frame from the front side to the left and right front ends of the engine cover; An upper side of which is covered by a right front end of the swivel frame, a valve chamber defined by a height dimension of a vertical plate, and a control valve disposed in the valve chamber to control the supply and discharge of pressurized oil to and from the working device. A swiveling construction machine comprising a group. 3. The swivel-type construction machine according to claim 1, wherein the control valve group is arranged horizontally in the swivel frame. 4. A lower corner cover and a lower side cover are provided at a right front position of the turning frame, and an under cover is provided at a lower right position of the turning frame, and the valve accommodating chamber is provided together with the engine cover and a floor plate. The swiveling construction machine according to claim 2, wherein the swing type construction machine is configured to be closed by the lower corner cover, the lower side cover, and the under cover. 5. A vent for exhausting hot air in the valve accommodating chamber to the outside is provided in any one of the lower corner cover, the lower side cover and the under cover, or between the lower side cover and the under cover. The swiveling construction machine according to claim 4, which is configured. 6. The valve accommodating chamber is formed as a space within a height dimension of a vertical plate from a bottom plate of the revolving frame,
A valve housing space in which the control valve group is housed, and a rod housing space formed as a space located above the valve housing space and housing rods connected to the control valve group. The swiveling construction machine according to claim 2.