JP2001059237A - Slewing type construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently dispose an oil storage tank, to improve the degree of freedom of the arrangement of each equipment and to miniaturize a revolving super structure. SOLUTION: A battery 15 is positioned on the front side of an engine 8 and disposed on the right side of a tube 6A for a rotating cylinder 6, a hydraulic fluid tank 16 is disposed so as to cover the tube 6A base-end side of the rotating cylinder 6 and the upper side of the battery 15, and a fuel tank 18 adjoins the front side of the hydraulic fluid tank 16 and arranged so as to be crossed over the upper side of the front end side of the tube 6A of the rotating cylinder 6. Accordingly, the hydraulic fluid tank 16 can be disposed by utilizing a space on the upper side of the rotating cylinder 6 and the battery 15, and the fuel tank 18 can be arranged by utilizing a space on the upper side of the rotating cylinder 6. Thus, the battery 15, the hydraulic fluid tank 16, the fuel tank 18 or the like can be disposed efficiently on a revolving super structure.

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 suitably used as, for example, a hydraulic shovel, a hydraulic crane and the like.

[0002]

2. Description of the Related Art In general, a hydraulic shovel or the like is known as a swing type construction machine. The hydraulic excavator is composed of a lower traveling body and an upper revolving body pivotally mounted on the lower traveling body, and a work device for excavating earth and sand, etc., is raised and lowered on a front side of the upper revolving body. It is provided as possible.

A small hydraulic excavator called a mini excavator among hydraulic excavators has a mechanism (swing mechanism) that swings a working device left and right with respect to an upper revolving unit.
Some have. This hydraulic excavator swings the working device in the left and right directions, and at the same time, turns the upper revolving unit to the opposite side to the swinging direction of the working device by the same angle, so that the working device is parallel to the left and right directions. , And in this state, the gutter digging work can be performed.

A conventional excavator of this type is disclosed in Japanese Patent Application Laid-Open No. 9-242118 and Japanese Patent Application Laid-Open
No. 92311 and the like. An upper revolving structure used in the hydraulic excavator according to the related art includes a revolving frame provided with a working device pivot bracket for supporting the working device to be able to swing left and right in a front side, and a rear side of the revolving frame. An engine mounted in a horizontal position extending leftward and rightward on the revolving frame, and working with the revolving frame so as to extend forward and rearward of the revolving frame at a front side of the engine. A swing cylinder mounted between the device pivot bracket, a battery disposed on the pivot frame, a hydraulic oil tank disposed on the pivot frame for storing hydraulic oil, and a hydraulic oil tank disposed on the pivot frame. And a fuel tank for storing fuel.

Here, in the hydraulic shovel described in the above-mentioned Japanese Patent Application Laid-Open No. 9-242118, a battery is arranged in a place different from a hydraulic oil tank and a fuel tank. A space is provided above the battery to lift the battery when the battery is attached or detached.

On the other hand, the hydraulic excavator described in Japanese Patent Application Laid-Open No. 11-93211 has a hydraulic oil tank disposed between an engine and a counterweight, and a battery disposed above the hydraulic oil tank. I have.

[0007]

SUMMARY OF THE INVENTION Among the above-mentioned prior art hydraulic excavators, Japanese Patent Application Laid-Open No. 9-2421 is disclosed.
In the device described in Japanese Patent Publication No. 18, a space for attaching and detaching the battery is provided above the battery. Therefore,
Since other devices cannot be arranged in the space for attachment and detachment, there is a problem that each device cannot be efficiently arranged on the upper swing body.

In the hydraulic shovel disclosed in Japanese Patent Application Laid-Open No. H11-93211, the hydraulic oil tank is disposed in a narrow space between the engine and the counterweight, so that the shape of the hydraulic oil tank becomes complicated. There is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to efficiently arrange an oil storage tank, increase the degree of freedom in arranging each device, and provide an upper revolving unit. It is an object of the present invention to provide a swivel type construction machine capable of reducing the size of a rotary construction machine.

[0010]

A revolving construction machine according to the present invention comprises: a lower traveling body; an upper revolving body rotatably mounted on the lower traveling body; And a working device provided as possible.

Then, in order to solve the above-mentioned problem,
A feature of the configuration adopted by the invention of claim 1 is that the upper revolving body has a revolving frame provided with a working device pivot bracket for supporting the working device to be able to swing left and right in a front side;
It is located on the rear side of the turning frame,
An engine mounted in a horizontal state extending rightward,
A swing cylinder attached to the front of the engine and extending between the swing frame and the working device pivot bracket so as to extend forward and backward of the swing frame; and a swing cylinder located closer to the outer cover than the swing cylinder. And a battery disposed on the revolving frame and an oil storage tank disposed above the battery and storing fuel, hydraulic oil, and the like.

[0012] With this configuration, the oil storage tank for storing fuel, hydraulic oil, and the like can be provided by utilizing the space above the battery, and each device can be efficiently arranged on the turning frame. it can.

According to the second aspect of the present invention, the oil storage tank is a hydraulic oil tank disposed above the swing cylinder and the battery, and a fuel tank is provided in front of the hydraulic oil tank across the upper side of the swing cylinder. It is in the configuration.

[0014] With this configuration, the hydraulic oil tank can be disposed by utilizing the rear part of the swing cylinder and the space above the battery. Further, the fuel tank can be disposed by utilizing the space above the front part of the swing cylinder.

According to the third aspect of the present invention, the oil storage tank is a fuel tank disposed over the upper side of the battery, and a hydraulic oil tank is provided on the back side of the fuel tank above the swing cylinder. It is in.

With this configuration, the fuel tank can be provided by utilizing the space above the battery. Further, the hydraulic oil tank can be provided by utilizing the space above the swing cylinder extending in the front and rear directions.

According to the fourth aspect of the present invention, the bottom surface of the fuel tank is formed in a stepped bottom shape having a deep bottom portion and a shallow bottom portion, and a swing cylinder or a battery is disposed in a space below the shallow bottom portion. The hydraulic oil tank is formed in a rectangular parallelepiped shape.

With this configuration, since the fuel tank can be molded with resin, the deep bottom of the fuel tank can be extended to the side of the swing cylinder or the battery, and the oil storage capacity can be increased accordingly. Can be.
Further, since the hydraulic oil tank is formed in a rectangular parallelepiped shape, the hydraulic oil tank, which is a pressurized container, can be easily and highly rigidly formed of a flat metal plate.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hydraulic shovel will be described as an example of a swing type construction machine according to an embodiment of the present invention, and will be described in detail with reference to the accompanying drawings. In the present embodiment,
“Front, rear” and “left, right” are used to mean directions or positions as viewed from an operator seated in a driver's seat.

First, FIGS. 1 to 4 show a first embodiment of the present invention. Reference numeral 1 denotes a lower traveling body of a hydraulic shovel, 2 denotes an upper revolving body mounted on the lower traveling body 1 so as to be pivotable, and a work device 3 for excavating earth and sand is provided in front of the upper revolving body 2. Is provided.

Here, the working device 3 includes a boom 3A which is attached to a boom pivot bracket 5 to be described later so as to be able to move up and down.
And an arm 3B attached to the end of the boom 3A so as to be able to move up and down, and a bucket 3C attached to the end of the arm 3B so as to be rotatable.
A boom cylinder 3D is provided between the boom pivot bracket 5 and the boom 3A, and the boom 3A and the arm 3
B, an arm cylinder 3E is provided.
A bucket cylinder 3F is provided between B and the bucket 3C.

On the other hand, as shown in FIGS. 2 and 3, the upper swing body 2 includes a swing frame 4, a boom pivot bracket 5, a swing cylinder 6, an engine 8, a battery 15,
It is roughly constituted by a hydraulic oil tank 16, a fuel tank 18, and the like.

Reference numeral 4 denotes a revolving frame which constitutes a support structure for the upper revolving unit 2. The revolving frame 4 is a flat bottom plate 4.
A, a pair of left and right vertical plates 4B, 4 standing upright on the bottom plate 4A and extending forward and rearward and approaching each other toward the front side.
C, an upper bracket 4D fixed to the upper front portion of each of the vertical plates 4B and 4C, and a lower bracket 4E fixed to the lower front portion of each of the vertical plates 4B and 4C so as to face the upper bracket 4D. It is roughly constituted by. The skirt cover 25 is located on the upper surface side of the bottom plate 4A more than the right vertical plate 4C.
A cylinder mounting portion 4F is provided on the right side to which a tube 6A of a swing cylinder 6 described later is mounted. Further, a boom pivot bracket 5 to be described later is attached to the distal ends of the upper bracket 4D and the lower bracket 4E.
Are rotatably mounted.

Reference numeral 5 denotes a boom pivot bracket provided at the front of the revolving frame 4. The boom pivot bracket 5 is
The upper bracket 4D and the lower bracket 4E are attached to the distal ends so as to swing leftward and rightward. Further, the boom pivot bracket 5 is provided with a boom mounting portion 5A to which the boom 3A of the working device 3 is mounted and a boom cylinder mounting portion 5B to which the boom cylinder 3D is mounted. Further, the boom pivot bracket 5 includes:
A swing cylinder attachment portion 5C to which the piston rod 6B of the swing cylinder 6 is attached is provided extending rightward.

Reference numeral 6 denotes a swing cylinder which is located on the front side of the engine 8 and extends forward and backward along the right vertical plate 4C of the revolving frame 4. The swing cylinder 6 is provided with a tube 6A. The base end is attached to the cylinder attachment portion 4F of the revolving frame 4, and the tip end of the piston rod 6B is attached to the tip of the swing cylinder attachment portion 5C of the boom pivot bracket 5. The swing cylinder 6 swings (swings) the working device 3 in the left and right directions together with the boom pivot bracket 5 by extending and contracting the piston rod 6B.

Reference numeral 7 denotes a counterweight attached to the rear end of the revolving frame 4. The counterweight 7 balances the weight of the working device 3 and is formed in an arc shape corresponding to the turning radius. .

Reference numeral 8 denotes an engine mounted on the revolving frame 4. The engine 8 is disposed on the rear side of the revolving frame 4 and in front of the counterweight 7 so as to extend horizontally to the left and right. I have. A cooling fan 9 is provided on the right side of the engine 8, and a hydraulic pump 10 is mounted on the left side.

Reference numeral 11 denotes a radiator disposed on the right side of the engine 8 and near the cooling fan 9;
It cools the engine cooling water. Reference numeral 12 denotes an oil cooler disposed adjacent to the left side (engine side) of the radiator 11, and the oil cooler 12 cools hydraulic oil.

Reference numeral 13 denotes a multiple valve device located on the left side of the revolving frame 4 and in front of the hydraulic pump 10. The multiple valve device 13 is constituted by a plurality of hydraulic pilot type switching valves. ing.

Reference numeral 14 denotes a turning motor provided at the center of the bottom plate 4A of the turning frame 4. The turning motor 14 drives a turning device (not shown) for turning the upper turning body 2 with respect to the lower traveling body 1. It constitutes a part.

A battery 15 is provided on the right side of the bottom plate 4A of the revolving frame 4 at the front side of the engine 8. The battery 15 is closer to the base end of the tube 6A of the swing cylinder 6 than the skirt of the tube 6A. The cover 25 is disposed at a position closer to the right side on the side of the cover 25.

A hydraulic oil tank 16 is located on the right side of the turning frame 4 and constitutes an oil storage tank disposed in front of the engine 8. The hydraulic oil tank 16 actively pumps hydraulic oil toward the hydraulic pump 10. A relatively low pressure is applied by pneumatic pressure so as to be able to supply the pressure. For this reason, the hydraulic oil tank 16 includes a flat front plate 16A, a rear plate 16B, and left and right side plates 16C, 16 made of, for example, a metal material.
C, formed by the top plate 16D and the bottom plate 16E,
It is configured as a substantially rectangular parallelepiped container vertically set up and down.

Here, the hydraulic oil tank 16 is disposed so as to cover the base end of the tube 6 A of the swing cylinder 6 and the upper side of the battery 15 via the mount 17. And
The hydraulic oil tank 16 stores hydraulic oil to be supplied to the hydraulic pump 10, and includes the hydraulic pump 10, the oil cooler 1, and the like.
2. It is connected to the multiple valve device 13 and the like.

The gantry 17 is formed so as to straddle the battery 15. When the battery 15 is attached or detached, the skirt cover 25 on the right side is removed, so that the battery 15 is brought closer to the operator (right side). You can go in and out.

Reference numeral 18 denotes a fuel tank disposed on the revolving frame 4 adjacent to the front side of the hydraulic oil tank 16. The fuel tank 18 is formed using, for example, a resin material.
The fuel tank 18 has a front part 18A and a rear part 18A.
B, a left side portion 18C, a right side portion 18D, a top surface portion 18E, and a bottom portion 18F, and corners between the front portion 18A and the right side portion 18D which are located outside when turning,
The chamfered portion 18G is set to be within the turning radius.

As shown in FIG. 4, the right side of the bottom portion 18F of the fuel tank 18 is a deep bottom portion 18F1, and the left side of the deep bottom portion 18F1 is a shallow bottom portion 18F2. Thus, the bottom portion 18F has a stepped bottom shape, and a space 19 is formed below the shallow bottom portion 18F2. The fuel storage capacity of the fuel tank 18 is increased by making the right side of the bottom portion 18F a deep bottom portion 18F1. The fuel tank 18 has a shallow bottom portion 18F2
Is disposed on the bottom plate 4A of the revolving frame 4 via the gantry 20 so as to straddle the distal end side of the tube 6A of the swing cylinder 6 by the lower space 19.

Reference numeral 21 denotes an engine cover (shown in FIG. 1) serving as an upper exterior cover.
Includes an engine front cover (not shown) covering the front side from the upper side of the engine 8, a right cover 22 covering the hydraulic oil tank 16, the fuel tank 18, and the like, and a left cover (not shown) covering the hydraulic pump 10 and the like. And a hood 23 that covers the rear side of the engine 8.

Reference numerals 24 and 25 denote left and right skirt covers which are located below the engine cover 21 and cover the periphery of the revolving frame 4. The skirt covers 24 and 25 constitute lower exterior covers. I have.

Reference numeral 26 denotes a driver's seat on which an operator sits, and an upper portion of the driver's seat 26 is covered by a canopy 27.

As described above, according to the present embodiment, the battery 15 is located on the right side of the tube 6A of the swing cylinder 6 at the front side of the engine 8, and the hydraulic oil tank 16
Is disposed so as to cover the base end of the tube 6A of the swing cylinder 6 and the upper side of the battery 15. The fuel tank 18 is adjacent to the front side of the hydraulic oil tank 16 and covers the upper side of the tip end of the tube 6A of the swing cylinder 6. It is arranged in. Thereby, the hydraulic oil tank 16 can be disposed using the space above the swing cylinder 6 and the battery 15, and the fuel tank 18 can be disposed using the space above the swing cylinder 6. Can be.

As a result, the battery 15 is
Since the hydraulic oil tank 16, the fuel tank 18, and the like can be efficiently arranged, the degree of freedom in arranging each device can be increased, and the size of the upper swing body 2 can be reduced.

The fuel tank 18 has a front portion 18A.
Since the chamfered portion 18G is formed at a corner between the upper revolving structure 2 and the right side surface portion 18D, the fuel tank 18 can be accommodated within the revolving radius of the upper revolving structure 2, and the revolving radius of the upper revolving structure 2 is reduced. Thus, the workability of the hydraulic excavator can be improved.

Since the hydraulic oil tank 16 is formed as a substantially rectangular parallelepiped container, the hydraulic oil tank 16 can be easily formed by the metal plates 16A to 16E, and the productivity can be improved. it can. Moreover, since the hydraulic oil tank 16 can be formed with high rigidity by the metal plates 16A to 16E, it is possible to maintain the pressure resistance against pressurization.

Further, the bottom portion 18F of the fuel tank 18
Has a stepped bottom shape by the deep bottom portion 18F1 and the shallow bottom portion 18F2, so that the space 1 below the shallow bottom portion 19F2
The tube 6 </ b> A of the swing cylinder 6 can be arranged at 9. Moreover, since the deep bottom portion 18F1 can be extended to the side of the swing cylinder 6, the oil storage capacity of the fuel tank 18 can be increased. Also, the fuel tank 1
Since the fuel tank 8 can be formed by resin molding, the fuel tank 18 can be easily formed even when the shape of the fuel tank 18 is complicatedly designed, and the degree of freedom of the shape can be increased.

Next, FIGS. 5 to 7 show a second embodiment of the present invention. The feature of this embodiment is that the oil storage tank is a fuel tank disposed over the upper side of the battery. In addition, a hydraulic oil tank is provided above the swing cylinder on the rear side of the fuel tank. In addition,
In the present embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 31 denotes a fuel tank as an oil storage tank according to the present embodiment which is used in place of the fuel tank 18 according to the first embodiment. The fuel tank 31 is a fuel tank according to the first embodiment. Almost like tank 18,
For example, the front portion 31A and the rear portion 31 are made of a resin material.
B, left side 31C, right side 31D, top 31E and bottom 31F, front 31A and right 31
D and a chamfered portion 31G are formed. However, the fuel tank 31 according to the present embodiment is formed so as to straddle the battery 15 and is disposed adjacent to the right side on the skirt cover 25 side of the hydraulic oil tank 34 to be described later.
This is different from the fuel tank 18 according to this embodiment.

Further, the fuel tank 31 has a bottom portion 31F.
Is a deep bottom portion 31F1, and the deep bottom portion 31F1
The rear side portion is a shallow bottom portion 31F2. Thereby, the bottom 31F has a stepped bottom shape, and the shallow bottom 31F
A space 32 is formed below 2. The fuel tank 31 is disposed on a bottom plate 4B of the revolving frame 4 via a frame 33 so that the battery 15 can be accommodated in a space 32 below the shallow bottom portion 31F2.

Reference numeral 34 denotes a hydraulic oil tank according to the present embodiment which is used in place of the hydraulic oil tank 16 according to the first embodiment. The hydraulic oil tank 34 is a hydraulic oil tank according to the first embodiment. Almost similarly to the tank 16, for example, a flat front plate 34A, a rear plate 34B made of a metal material,
It is formed by left and right side plates 34C, 33C, a top plate 34D, and a bottom plate 34E (shown in FIG. 7).

However, as shown in FIG. 6, the hydraulic oil tank 34 according to the present embodiment is located at a position on the left side, which is the back surface of the fuel tank 31, and is substantially the same length as the tube 6A of the swing cylinder 6. To cover the tube 6
It is different from the hydraulic oil tank 16 according to the first embodiment in that the hydraulic oil tank is disposed above the A through a frame 35.

Thus, also in the present embodiment configured as described above, it is possible to obtain substantially the same operation and effect as in the first embodiment.

In the first embodiment, the case where the hydraulic oil tank 16 is disposed on the rear side and the fuel tank 18 is disposed on the front side has been described as an example. Alternatively, the fuel tank may be disposed on the rear side. The hydraulic oil tank may be arranged on the front side.

In the second embodiment, the fuel tank 31 is set on the right side (the skirt cover side),
Is described on the left side (the rear side of the fuel tank 31) as an example, but instead, the fuel tank may be disposed on the left side and the hydraulic oil tank may be disposed on the right side.

In each embodiment, the hydraulic oil tank 1
6, 34 made of a metal material, and the fuel tank 18,
31 is described as being formed of a resin material,
The present invention is not limited to this, and the hydraulic oil tank may be formed of a resin material, and the fuel tank may be formed of a metal material.

On the other hand, in the first embodiment, the case where the fuel tank 18 is provided with the chamfered portion 18G at the corner between the front surface portion 18A and the right side surface portion 18D is exemplified. Thus, an arc-shaped surface portion may be formed at a corner between the front surface portion and the right side surface portion. This configuration can be applied to the second embodiment.

Further, in each embodiment, the case where the swing cylinder 6, the battery 15, the hydraulic oil tanks 16, 34, and the fuel tanks 18, 31 are disposed on the right side of the turning frame 4 has been described as an example. The present invention is not limited to this, and can be applied to a case where these devices are disposed on the left side of the turning frame.

Further, in each of the embodiments, a small-sized hydraulic excavator has been described as an example of the swing type construction machine.
The present invention is not limited to this, and can be applied to other revolving construction machines such as, for example, medium-sized and large-sized hydraulic excavators and hydraulic cranes.

[0057]

As described above in detail, according to the first aspect of the present invention, the upper swing body is provided with the working device pivot bracket for supporting the working device so as to swing left and right in the front side. A revolving frame, an engine mounted on a side of the revolving frame, which is located on the rear side of the revolving frame and extends leftward and rightward in a horizontal position; A swing cylinder mounted between the swing frame and the working device pivot bracket so as to extend rearward, a battery disposed on the swing frame at a position closer to the exterior cover than the swing cylinder, Since it is constituted by an oil storage tank disposed above the battery and storing fuel, hydraulic oil, and the like, an oil storage tank storing fuel, hydraulic oil, and the like using the space above the battery is provided. It can be. Thereby, since the battery, the oil storage tank, and the like can be efficiently arranged on the upper swing body, the degree of freedom of arrangement of each device can be increased,
Further, the size of the upper swing body can be reduced.

According to the second aspect of the present invention, the oil storage tank comprises:
A hydraulic oil tank disposed above the swing cylinder and the battery, and a fuel tank is provided on the front side of the hydraulic oil tank so as to straddle the upper side of the swing cylinder. The hydraulic oil tank can be disposed using the upper space.
Further, the fuel tank can be disposed by utilizing the space above the front part of the swing cylinder.

According to the third aspect of the present invention, the oil storage tank is a fuel tank disposed over the upper side of the battery, and a hydraulic oil tank is provided on the back side of the fuel tank above the swing cylinder. Therefore, the fuel tank can be disposed using the space above the battery.
Further, the hydraulic oil tank can be provided by utilizing the space above the swing cylinder extending in the front and rear directions.

According to the invention of claim 4, the bottom surface of the fuel tank is formed in a stepped bottom shape having a deep bottom portion and a shallow bottom portion, and a swing cylinder or a battery is arranged in a space below the shallow bottom portion. Since the hydraulic oil tank is formed in a rectangular parallelepiped shape and the fuel tank can be formed by resin molding, the deep bottom of the fuel tank can be extended to the side of the swing cylinder or the battery. The oil storage capacity can be increased by the amount. Further, since the hydraulic oil tank is formed in a rectangular parallelepiped shape, the hydraulic oil tank, which is a pressurized container, can be easily and highly rigidly formed of a flat metal plate. Cost reduction,
Productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a hydraulic excavator applied to a first embodiment of the present invention.

FIG. 2 is an enlarged front view showing an upper revolving structure with an engine cover and a skirt cover removed.

FIG. 3 is a plan view showing the upper revolving structure with an engine cover, a driver's seat, and the like removed.

FIG. 4 is an enlarged external perspective view showing a part of a turning frame, a swing cylinder, a hydraulic oil tank, a fuel tank, and the like.

FIG. 5 is a front view showing an upper revolving structure according to a second embodiment of the present invention with an engine cover and a skirt cover removed.

FIG. 6 is a plan view showing an upper revolving structure according to a second embodiment with an engine cover, a driver's seat, and the like removed.

FIG. 7 is an external perspective view showing a fuel tank and a hydraulic oil tank together with a part of a turning frame, a swing cylinder, and the like.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving body 3 Working device 4 Revolving frame 6 Swing cylinder 8 Engine 15 Battery 16, 34 Hydraulic oil tank (oil storage tank) 16A, 34A Front plate 16B, 34B Rear plate 16C, 34C Side plate 16D, 34D Face plate 16E, 34E Bottom plate 18, 31 Fuel tank (oil storage tank) 18A, 31A Front part 18B, 31B Rear part 18C, 31C Left side part 18D, 31D Right side part 18E, 31E Top part 18F, 31F Bottom part 18F1, 31F1 Deep bottom 18F2, 31F2 Shallow bottom 19, 32 Space 24, 25 Skirt cover (exterior cover)

Continuing on the front page (72) Inventor Shinichi Sato 650, Kandate-cho, Tsuchiura-shi, Ibaraki Prefecture Within the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. Inside the factory (72) Inventor Makoto Kuno 650 Kandachi-cho, Tsuchiura-shi, Ibaraki Pref. Inside the Tsuchiura factory, Hitachi Construction Machinery Co., Ltd. AA20 KA10

Claims (4)

[Claims] 1. A revolving construction comprising: a lower traveling body; an upper revolving body rotatably mounted on the lower traveling body; and a working device provided on a front portion of the upper revolving body so as to be capable of elevating. In the machine, the upper revolving unit is provided with a revolving frame provided with a working device pivot bracket for swingably supporting the working device in the left and right directions on a front side, and revolving at a position rearward of the revolving frame. An engine mounted in a horizontal position extending left and right on a frame, and the turning frame and a working device pivot bracket positioned at a front side of the engine so as to extend forward and rearward of the turning frame. , A battery disposed on the revolving frame at a position closer to the outer cover than the swing cylinder, and a fuel, hydraulic oil, and the like disposed above the battery for storing fuel, hydraulic oil, and the like. Saving Pivoting construction machine, characterized by being configured by the tank. 2. The oil storage tank is a hydraulic oil tank disposed above the swing cylinder and a battery, and a fuel tank is provided in front of the hydraulic oil tank so as to straddle the upper side of the swing cylinder. The swiveling construction machine according to claim 1. 3. The oil storage tank is a fuel tank disposed over the upper side of the battery, and a hydraulic oil tank is provided on the rear side of the fuel tank above the swing cylinder. The swivel-type construction machine according to 1. 4. A structure in which the bottom surface of the fuel tank is formed in a stepped bottom shape having a deep bottom portion and a shallow bottom portion, and the swing cylinder or the battery is disposed in a space below the shallow bottom portion. The rotary construction machine according to claim 2, wherein the oil tank is formed in a rectangular parallelepiped shape.