JP2002275936A - Slewing construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slewing construction machine in which a heat exchanger, an operating oil tank or a control valve are arranged on one side of a hydraulic pump, to thereby shorten the length of pipes connecting the above component parts to each other and facilitate operation of the construction equipment. SOLUTION: The slewing construction machine is constructed such that the hydraulic pump 11 is arranged on a right side of a revolving frame 4, that a cooling fan 14 is separated from an engine 10, and that a radiator 12, an oil cooler 13, the cooling fan 14, the operating oil tank 15, and a control valve group 16 are arranged on the right side of the revolving frame 4 together with the hydraulic pump 11. Therefore, an intake pipe 17 connecting the hydraulic pump 11 to the operating oil tank 15 and to the control valve group 16, and respective discharge pipes 18 are shortened in length, to thereby facilitate connection of the pipes of the construction equipment.

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 comprises a self-propelled lower traveling body and an upper revolving body pivotally mounted on the lower traveling body, and performs an operation of excavating earth and sand on a front side of the upper revolving body. The device is provided so as to be capable of elevating.

[0003] The upper revolving superstructure includes a revolving frame, an engine mounted on the revolving frame, a hydraulic pump driven by the engine, a cooling fan for generating cooling air, and a cooling air from the cooling fan. A heat exchanger such as a radiator or an oil cooler that cools fluid by a hydraulic pump, a hydraulic oil tank that stores hydraulic oil to be supplied to the hydraulic pump, and supplies and discharges hydraulic oil discharged from the hydraulic pump to an actuator or the like of a working device. A plurality of control valves.

[0004] Here, there is a small-sized excavator called a mini-excavator as an excavator. This type of excavator is known, for example, from JP-A-6-212665 and JP-A-8-199624. I have. In this hydraulic shovel according to the related art, the upper swing body is formed in a small diameter substantially circular shape so that the swing radius becomes smaller when the upper swing body is swung. Further, in this hydraulic excavator, the engine is mounted on the rear side of the revolving frame in a horizontal state extending leftward and rightward. For example, a hydraulic pump is provided at the left end of the engine, and a cooling fan is provided at the right end. .
A radiator, a heat exchanger such as an oil cooler is disposed on the right side so as to face the cooling fan, and a hydraulic oil tank is provided on the front side of the heat exchanger, that is, on the front right side of the turning frame.
Each control valve is installed. This allows the cooling fan,
The heat exchanger, the hydraulic oil tank, and each control valve are collectively arranged on the right side of the swivel frame so that, for example, connection work of pipes connecting the heat exchanger, the hydraulic oil tank, and the control valve can be easily performed. I have to.

[0005] The conventional hydraulic excavator is
When the engine drives the hydraulic pump, the hydraulic pump supplies pressure oil to each control valve. Thereby, the control valve supplies pressure oil to, for example, an actuator of the working device, and performs the excavation work of the earth and sand by raising and lowering the working device.

When the engine is driven, a cooling fan provided in the engine rotates, cooling air is supplied to the heat exchanger, and engine cooling water, hydraulic oil and the like are cooled. Further, the cooling air at this time is also supplied to a hydraulic oil tank and each control valve arranged on the same right side as the cooling fan, so that they can be cooled.

[0007]

By the way, in the above-mentioned hydraulic shovel according to the prior art, a cooling fan, a heat exchanger, a hydraulic oil tank, and respective control valves are arranged on the right side of the swivel frame, so that pipe connection work is performed. And each part is cooled by cooling air from a cooling fan.

However, since the cooling fan is provided at the right end of the engine, it cannot be arranged near the hydraulic pump provided at the left end of the engine.
Further, since the hydraulic pump is disposed on the left side of the turning frame, the piping for connecting the hydraulic pump to the hydraulic oil tank disposed on the right side and each control valve becomes long, and the piping during connection work is increased. There is a problem that workability is reduced.

Further, piping connecting the hydraulic pump disposed on the rear left side with the hydraulic oil tank and the control valve disposed on the front right side passes under a driver's seat provided on the upper front side of the engine. Therefore, there is a problem that noise from the pipe easily leaks to the driver's seat side, and this noise deteriorates the working environment.

When the cooling fan is mounted on the engine, the position of the cooling fan is restricted by the structure of the engine. Therefore, it is difficult to arrange the cooling fan in front of the heat exchanger. There is a problem that the cooling efficiency is reduced.

Further, the cooling fan is mounted on the engine, and vibrates greatly with the engine as compared with the heat exchanger mounted on the turning frame. For this reason, in order to prevent the cooling fan from coming into contact with the heat exchanger due to vibration, it is necessary to set a large gap between the two, and there is also a problem that the cooling efficiency is reduced in this regard.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to arrange a heat exchanger, a hydraulic oil tank, or a control valve on one side of a hydraulic pump so that these can be eliminated. It is an object of the present invention to provide a revolving construction machine in which the length of piping to be connected is shortened to facilitate handling, and the working space of an operator is widened to improve the working environment.

[0013]

According to a first aspect of the present invention, there is provided a swing type construction machine comprising: a self-propelled lower traveling body; and an upper revolving body rotatably mounted on the lower traveling body. The revolving structure includes a revolving frame, an engine mounted on the revolving frame, a hydraulic pump driven by the engine, a cooling fan that generates cooling air, and heat that cools fluid by the cooling air from the cooling fan. With an exchanger,
The hydraulic pump is disposed on one side in the left and right directions of the revolving frame, and the cooling fan is separated from the engine and driven by a power source different from the engine. The device is characterized in that it is arranged together with the hydraulic pump on one side in the left and right directions of the turning frame.

With this configuration, the hydraulic pump and the heat exchanger are shifted to one side of the revolving frame,
Since they are arranged close to each other, for example, a suction pipe that sucks hydraulic oil from a hydraulic oil tank to a hydraulic pump, a discharge pipe that discharges hydraulic oil from a hydraulic pump to a control valve, a heat exchanger, a hydraulic oil tank, and a control valve are connected. The length of the pipe to be used can be reduced. Also, by separating the cooling fan from the engine, the cooling fan and heat exchanger can be arranged without restriction on the engine. Therefore, the cooling fan, heat exchanger, etc. can be freely set, centering on the hydraulic pump attached to the engine. In such a case, it can be arranged on one side of the revolving frame.

A revolving construction machine according to a second aspect of the present invention comprises a self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, wherein the upper revolving body is a revolving frame. An engine mounted on the revolving frame, a hydraulic pump driven by the engine, a cooling fan for generating cooling air, a heat exchanger for cooling fluid by cooling air from the cooling fan, A hydraulic oil tank for storing hydraulic oil to be supplied to the pump, wherein the hydraulic pump is disposed to be offset to one of the left and right sides of the turning frame, and the cooling fan is separated from the engine and separated from the engine. The cooling fan, the heat exchanger, and the hydraulic oil tank are arranged to be shifted to one side of the left and right sides of the turning frame together with the hydraulic pump. To have.

According to this structure, the hydraulic pump, the heat exchanger, and the hydraulic oil tank are arranged so as to be closer to one side of the revolving frame and closer to each other. The length of a suction pipe for sucking oil, a pipe for connecting a heat exchanger and a hydraulic oil tank, and the like can be reduced. In addition, by separating the cooling fan from the engine, the cooling fan, heat exchanger, hydraulic oil tank, etc. can be freely arranged on one side of the turning frame, centering on the hydraulic pump attached to the engine. Can be.

According to a third aspect of the present invention, there is provided a swing type construction machine comprising: a self-propelled lower traveling body; and an upper revolving body rotatably mounted on the lower traveling body. An engine mounted on the revolving frame, a hydraulic pump driven by the engine, a cooling fan for generating cooling air, a heat exchanger for cooling fluid by cooling air from the cooling fan, A control valve for supplying and discharging pressure oil discharged from a pump to an actuator, wherein the hydraulic pump is arranged to be shifted to one side of the turning frame on the left or right side, and the cooling fan is separated from an engine to separate the turning fan from the engine. The engine is driven by a power source different from the engine, and the cooling fan, the heat exchanger, and the control valve are arranged together with the hydraulic pump on one side in the left and right directions of the turning frame. It is characterized.

With this configuration, the hydraulic pump, the heat exchanger, and the control valve are arranged so as to be shifted to one side of the revolving frame and close to each other, so that hydraulic oil is supplied from the hydraulic pump to the control valve. The length of the discharge pipe for discharging, the pipe connecting the heat exchanger to the control valve, and the like can be reduced. In addition, by separating the cooling fan from the engine, the cooling fan, heat exchanger, control valve, etc. can be freely connected, centering on the hydraulic pump attached to the engine,
It can be arranged on one side of the revolving frame.

A revolving construction machine according to a fourth aspect of the present invention comprises a self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, wherein the upper revolving body is a revolving frame. An engine mounted on the revolving frame, a hydraulic pump driven by the engine, a cooling fan for generating cooling air, a heat exchanger for cooling fluid by cooling air from the cooling fan, A hydraulic oil tank for storing hydraulic oil to be supplied to the pump; and a control valve for supplying and discharging hydraulic oil discharged from the hydraulic pump to an actuator. The hydraulic pump is provided on one side of the turning frame on the left or right side. The cooling fan is separated from the engine and driven by a power source different from the engine. The cooling fan, the heat exchanger, the hydraulic oil tank, and the control valve Left of the rotating frame along with the pump,
It is characterized by being arranged one-sided on the right side.

With this configuration, the hydraulic pump, the heat exchanger, the hydraulic oil tank, and the control valve are arranged so as to be offset to one side of the turning frame and close to each other. A suction pipe that sucks hydraulic oil into the pump, a discharge pipe that discharges hydraulic oil from the hydraulic pump to the control valve, a return pipe that returns hydraulic oil from the control valve to the heat exchanger, and a return pipe that returns hydraulic oil from the heat exchanger to the hydraulic oil tank The length of the bypass pipe connecting the pipe, the control valve and the hydraulic oil tank can be reduced. In addition, by separating the cooling fan from the engine, the cooling fan, heat exchanger, hydraulic oil tank, control valve, etc. can be freely connected to one side of the revolving frame, centering on the hydraulic pump attached to the engine. Can be arranged.

According to the fifth aspect of the present invention, the rear portion of the upper revolving structure is formed in an arc shape with respect to the center of rotation.
The heat exchanger is provided on the rear side of the swing frame so as to follow the arc shape of the upper swing body.

With this configuration, the heat exchanger can be efficiently arranged without forming a useless space with respect to the outer shape of the upper revolving superstructure having the arc shape.

According to the sixth aspect of the present invention, a counterweight is provided at the rear end of the turning frame, and the engine is located in front of the counterweight so that the cylinder case extends horizontally to extend left and right. The heat exchanger is disposed obliquely to the direction in which the cylinder case of the engine extends.

With this configuration, even when the engine is mounted on the revolving frame in a horizontal position, the engine can be arranged without being restricted by the mounting structure.

According to the seventh aspect of the present invention, a driver's seat is provided on the revolving frame near the other side in the left and right directions, and the hydraulic pump, the cooling fan, and the heat exchanger are opposite to the driver's seat in the left and right directions. It is located on the side.

With this configuration, the pipes connected to the hydraulic pump can be connected so as to avoid the area below the driver's seat. Further, since the hydraulic pump, the cooling fan, and the heat exchanger are arranged on the side opposite to the driver's seat, a space can be provided around the driver's seat.

Further, as in the invention according to claim 8, the heat exchanger may be a radiator for cooling engine cooling water or an oil cooler for cooling hydraulic oil.

[0028]

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.

FIGS. 1 to 4 show a first embodiment of the present invention. The feature of this embodiment is that the cooling fan, the oil cooler, and the radiator are arranged on the rear side of the turning frame and are shifted to the right together with the hydraulic pump, and the hydraulic oil tank and the control valve group are arranged on the front side. is there.

Reference numeral 1 denotes a lower traveling body of the hydraulic shovel applied to the present embodiment, and 2 denotes an upper revolving body that is mounted on the lower traveling body 1 so as to be pivotable. , the working device 3 for performing digging work or the like of earth and sand is provided.

The working device 3 includes a swing post 3A attached to the front end of a later-described turning frame 4 so as to swing leftward and rightward, and a boom attached to the swing post 3A so as to be able to move up and down. 3B, an arm 3C attached to the distal end of the boom 3B so as to be able to move up and down, and a bucket 3D rotatably attached to the distal end of the arm 3C.

The turning frame 4 and the swing post 3
A, a swing cylinder 3E (shown in FIG. 3) is provided between the swing post 3A and the boom 3B, and a boom cylinder 3F is provided between the swing post 3A and the boom 3B.
C, an arm cylinder 3G is provided.
A bucket cylinder 3H is provided between C and the bucket 3D.

On the other hand, as shown in FIGS. 2 and 3, the upper swing body 2 has a swing frame 4, a counter weight 5,
Exterior cover 6, driver's seat 7, engine 10, hydraulic pump 1
1, radiator 12, oil cooler 13, cooling fan 1
4, generally constituted by a hydraulic oil tank 15, a control valve group 16, and the like, and are formed in a substantially circular shape as a whole.

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 left vertical plate 4B standing upright on the left side of the bottom plate 4A and extending forward and rearward and inclined to the right, and a right vertical plate standing upright on the right side of the bottom plate 4A and extending forward and rearward. It is generally constituted by a plate 4C and an upper plate 4D fixed to the upper front part of each of the vertical plates 4B, 4C. The working devices 3 are provided at the front ends of the bottom plate 4A and the upper plate 4D that constitute the revolving frame 4.
Swing post 3A is swingably mounted.

Reference numeral 5 denotes a counterweight attached to the rear end of the revolving frame 4 in order to balance the weight with the working device 3. The counterweight 5 has an outer shape on the rear side of the upper revolving unit 2. , And is formed in an arc shape centered on the turning center O. In addition, counter weight 5
A cutout 5A into which a radiator 12, which will be described later, is partially formed is formed on the right end side. The counterweight 5 covers an engine 10 and the like described later from the rear side.

Reference numeral 6 denotes an outer cover provided so as to cover the outer peripheral side of the revolving frame 4. The outer cover 6 is located on the upper right side of the revolving frame 4 and has a radiator 12, a hydraulic oil tank 15, and a control valve to be described later. Right cover 6A covering group 16 etc.
A left cover 6B located on the upper left side of the revolving frame 4 and covering a left portion of the engine 10 to be described later; a hood 6C located on the upper side of the counterweight 5 so as to be openable and closable; Right skirt cover 6D, left skirt cover 6E, front skirt cover 6
And F. Here, the outer cover 6 forms the outer shape of the upper revolving unit 2 together with the counterweight 5, and the rear portion thereof is formed in an arc shape centered on the revolving center O so as to be continuous with the counterweight 5. .

A driver's seat 7 is provided on a driver's seat support 7A, which is located on the front side of the hood 6C and covers the engine 10 from the front side. It is arranged in. A traveling lever 8 for traveling the lower traveling body 1 is provided on the front side of the driver's seat 7, and a working lever 9 for operating the working device 3 is provided on both the left and right sides.

Reference numeral 10 denotes an engine mounted behind the driver's seat 7 and in front of the counterweight 5 and mounted to the left of the revolving frame 4. The engine 10 includes a cylinder case 10A having left and right directions. It is mounted in a stretched horizontal position. Further, the engine 10 includes a water jacket (not shown) through which engine cooling water for cooling the engine 10 flows is provided in the cylinder case 10A.

Reference numeral 11 denotes a hydraulic pump mounted on the right end of the engine 10 and driven by the engine 10.
The hydraulic pump 11 is arranged to be located on the right side of the left and right sides of the turning frame 4 so as to be located on the right side of the driver's seat 7. The hydraulic pump 11 includes a main pump that supplies pressure oil for running the lower traveling body 1 and operating the working device 3, and a pilot pump that supplies pilot pressure for operating the control valve group 16. It is constituted by. The hydraulic pump 11 is connected to the hydraulic oil tank 15 and the control valve group 16 via a suction pipe 17 and a discharge pipe 18 described later.

Reference numeral 12 denotes a radiator as a heat exchanger for cooling the engine cooling water of the engine 10, and the radiator 1
Numeral 2 is arranged on the rear right side of the revolving frame 4 together with the hydraulic pump 11, and is supported via a bracket (not shown) along the counterweight 5, the right skirt cover 6D, etc., of which the front side is an arc. . This allows
The radiator 12, together with an oil cooler 13 described later,
The engine 10 is disposed obliquely to the extension direction of the cylinder case 10A. And the radiator 12
The engine 10 is connected to a water jacket via a hose (not shown).

Here, the radiator 12 can improve the cooling efficiency by disposing a cooling fan 14, which will be described later, in a substantially central position close to the radiator 12. Therefore, the radiator 12 is reduced in size by the improvement in the cooling efficiency. be able to.

Reference numeral 13 denotes an oil cooler as a heat exchanger provided adjacent to the rear side of the radiator 12. The oil cooler 13 is, like the radiator 12, a hydraulic pump 1.
1 and is disposed on the rear right side of the turning frame 4 and is disposed obliquely to the extension direction of the cylinder case 10A of the engine 10. The oil cooler 13 is connected to a hydraulic oil tank 15 and a control valve group 16, which will be described later, and cools hydraulic oil returned from the control valve group 16 to the hydraulic oil tank 15. The oil cooler 13 can be downsized for the same reason as the radiator 12.

Numeral 14 denotes a cooling fan provided on the back side of the oil cooler 13, which cools the outside air sucked from the left side of the engine 10 and the front side of the control valve group 16 as shown by the arrow in FIG. It is configured as a so-called “exhaust-type cooling fan” that sends air to the radiator 12 and the oil cooler 13 and discharges the air to the outside. The cooling fan 14 includes a blade 14A and a motor 14B that rotationally drives the blade 14A.
Is formed by an electric motor, a hydraulic motor, and the like.

Here, the cooling fan 14 is connected to the engine 10
, And is driven by a power source different from the engine 10, that is, a motor unit 14B. Thereby, the cooling fan 14 can be freely arranged in relation to the radiator 12 and the oil cooler 13. Therefore, the cooling fan 14 can be attached to the frame portion of the radiator 12 via, for example, a leg (not shown) extending from the motor portion 14B.
4A can be disposed at a position close to the center of the radiator 12 and the oil cooler 13.
The cooling efficiency can be improved by positively supplying the cooling air to the like.

A hydraulic oil tank 15 is disposed on the revolving frame 4 on the right side of the driver's seat 7 and near the front side of the radiator 12 and the oil cooler 13. The hydraulic pump 11, the oil cooler 13, the control valve group 1
6 and so on.

Reference numeral 16 denotes a control valve group comprising a plurality of control valves disposed on the right side of the revolving frame 4 and disposed in front of the hydraulic oil tank 15. , 3F, 3G, 3H, a hydraulic pump 11, an oil cooler 13, a hydraulic oil tank 15, and the like.

As described above, the radiator 12, the oil cooler 13, the cooling fan 14, the hydraulic oil tank 15, and the control valve group 16 are arranged together with the hydraulic pump 11 on the right side of the turning frame 4.

Reference numeral 17 denotes a hydraulic pump 1 from the hydraulic oil tank 15.
1 are three discharge pipes provided by connecting the hydraulic pump 11 and the control valve group 16 to each other. And the pilot pressure discharged from the control valve group 16 to the control valve group 16. Here, the suction pipe 17 and each discharge pipe 18 are connected to the hydraulic pump 11 by the hydraulic oil tank 15,
By being arranged in the vicinity of the control valve group 16, the length dimension is made short, and furthermore, it is arranged on the right side of the driver's seat 7 and away from the driver's seat 7.

Reference numeral 19 denotes the control valve group 16 to the oil cooler 13
, A second return pipe for returning hydraulic oil from the oil cooler 13 to the hydraulic oil tank 15, and 21 for directly supplying hydraulic oil from the control valve group 16 to the hydraulic oil tank 15. Are shown respectively.
The return pipes 19 and 20 and the bypass pipe 21
By arranging the oil cooler 13, the hydraulic oil tank 15, and the control valve group 16 to the right side, the length dimension is short,
Can be easily connected.

A canopy 22 covers the upper part of the driver's seat 7 on which the operator sits (see FIG. 1).

The hydraulic shovel according to the present embodiment has the above-described configuration. Next, the operation of the hydraulic shovel will be described.

First, the operator sits on the driver's seat 7 and operates the traveling lever 8 to cause the lower traveling body 1 to travel. When the operating lever 9 is operated,
The work apparatus 3 can be moved up and down, or the upper swing body 2 can be swung to perform an excavation work of earth and sand.

Next, the flow of cooling air when the cooling fan 14 is driven will be described with reference to FIG.

First, when the blade portion 14A of the cooling fan 14 is driven to rotate by the motor portion 14B, since the cooling fan 14 is an exhaust type, outside air is used as cooling air from the front side of the control valve group 16 and the left side of the engine 10. Inhaled. Thereby, the cooling air sucked from the front side of the control valve group 16 is
They flow around the control valve group 16 and the hydraulic oil tank 15 to cool them. Cooling air drawn from the left side of the engine 10 flows around the engine 10 and the hydraulic pump 11 to cool them. And the control valve group 16,
The cooling air that has passed through the hydraulic oil tank 15 and the cooling air that has passed through the engine 10 and the hydraulic pump 11 are
It is supplied to the radiator 12 and is discharged to the outside after cooling the working oil and the engine cooling water.

As described above, according to the present embodiment, the hydraulic pump 11 is arranged on the right side of the revolving frame 4 so as to be offset, the cooling fan 14 is separated from the engine 10, and the radiator 12, the oil cooler 13, the cooling fan 14, the hydraulic oil tank 15, and the control valve group 16 are arranged so as to be offset to the right of the revolving frame 4 together with the hydraulic pump 11, so that the suction pipe 17 connecting the hydraulic pump 11 and the hydraulic oil tank 15, the hydraulic pump Each discharge pipe 18 connecting the control valve group 11 to the control valve group 16, a first return pipe 19 connecting the control valve group 16 to the oil cooler 13, a second return connecting the oil cooler 13 and the hydraulic oil tank 15. The length of the bypass pipe 21 connecting the pipe 20, the control valve group 16 and the hydraulic oil tank 15 can be reduced.

As a result, the handling when connecting each pipe is facilitated, and the workability can be improved. Further, since the suction pipe 17 and the discharge pipes 18 are disposed at positions separated to the right of the driver's seat 7, noise around the driver's seat 7 can be suppressed and the working environment can be improved. Furthermore, the space around the driver's seat 7 can be expanded, and in this respect, the working environment can be improved.

Further, by separating the cooling fan 14 from the engine 10 and driving the cooling fan 14 by the motor unit 14B,
Since the cooling fan 14 can be directly attached to the radiator 12 or the like, the cooling fan 14, the radiator 1
2. The oil cooler 13 can be arranged on the right side of the turning frame 4 so as to be offset. Thus, the cooling fan 14, the radiator 12, and the oil cooler 13 can be freely arranged with the hydraulic pump 11 provided in the engine 10 as a center.

Therefore, the hydraulic pump 11, the radiator 1
2. The degree of freedom in the arrangement relationship between the oil cooler 13 and the cooling fan 14 can be increased. In addition, the upper revolving unit 2 can efficiently arrange them, and the upper revolving unit 2 can be reduced in size.

The cooling fan 14 is connected to the radiator 12,
By arranging the oil cooler 13 at a position close to substantially the center, cooling air can be positively supplied to the radiator 12 and the like. Thereby, the cooling efficiency of the radiator 12 and the oil cooler 13 can be improved, and these can be reduced in size. Also, the radiator 12,
By reducing the size of the oil cooler 13, the upper revolving unit 2 can also be reduced in size in this regard, and the turning radius can be reduced, so that the work performance of the hydraulic shovel can be improved.

The radiator 12 and the oil cooler 13
Is provided on the rear side of the revolving frame 4 so as to follow the arc shape of the counterweight 5 and the outer cover 6, so that a wasted space is formed between the counterweight 5 and the outer cover 6 having an arc shape. Instead, they can be provided. Thereby, the space on the revolving frame 4 can be effectively used, and the working space can be widened and the upper revolving unit 2 can be downsized.

Further, the cooling fan 14 can be freely arranged with respect to the radiator 12 and the oil cooler 13 without being restricted by the structure of the engine 10.
It is possible to save space, improve workability, increase the degree of freedom in designing, and the like.

Next, FIG. 5 shows a second embodiment of the present invention. This embodiment is characterized in that, the cooling fan, an oil cooler, the front side of the revolving frame the radiator, and in biased to the right place with the hydraulic pump, the hydraulic oil tank on the rear side, lies in placing the control valve group . 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 an engine according to the present embodiment. The engine 31 is an engine 10 according to the first embodiment.
In the same manner as in the above, the rear side of the driver's seat 7 and the counterweight 5
Of the cylinder case 3 on the revolving frame 4
1A is mounted in a horizontal state extending leftward and rightward.

A hydraulic pump 32 is attached to the right end of the engine 31 and driven by the engine 31. The hydraulic pump 32 is similar to the hydraulic pump 11 according to the first embodiment. The control valve group 3 which will be described later is disposed on the right side of the turning frame 4 in the left and right directions.
3. Connected to the hydraulic oil tank 34.

Reference numeral 33 denotes a control valve group according to the present embodiment, which is disposed on the revolving frame 4 on the right side of the hydraulic pump 32. The control valve group 33 is a control valve group according to the first embodiment. As in the case of No. 16, it is constituted by a plurality of control valves.

Reference numeral 34 denotes a hydraulic oil tank according to the present embodiment, which is located on the front side of the control valve group 33 and is disposed on the right side of the turning frame 4. The hydraulic oil tank 34 is the same as that according to the first embodiment. Similarly to the hydraulic oil tank 15, the hydraulic pump 32
It stores hydraulic oil to be supplied to the vehicle.

Reference numeral 35 denotes a radiator as a heat exchanger according to the present embodiment, which is located on the front side of the hydraulic oil tank 34 and is disposed on the right side of the front part of the turning frame 4.
Is similar to the radiator 12 according to the first embodiment.
It is connected to the engine 31.

An oil cooler 36 is provided adjacent to the front side of the radiator 35 as a heat exchanger according to the present embodiment. The oil cooler 36 is similar to the oil cooler 13 according to the first embodiment. Similarly, the control valve group 33,
It is connected to a hydraulic oil tank 34.

The cooling fan 37 is separated from the engine 31 and provided on the front side of the oil cooler 36 according to the present embodiment. The cooling fan 37 is substantially the same as the cooling fan 14 according to the first embodiment. In addition, the radiator 35 includes a blade portion 37A and a motor portion 37B serving as a driving source, and is attached to the radiator 35 via a leg (not shown) extending from the motor portion 37B, for example. However, the cooling fan 37 according to the present embodiment is configured as a so-called “suction-type cooling fan” that supplies the cooling air sucked from the outside to the oil cooler 36 and the radiator 35, and thus is different from the first embodiment. Is different from the cooling fan 14.

The hydraulic excavator according to the present embodiment has the above-described configuration. Next, the flow of cooling air when the cooling fan 37 is driven will be described.

First, when the cooling fan 37 is driven to rotate,
Since the cooling fan 37 is of a suction type, outside air is sucked in from the front side of the cooling fan 37 as cooling air and supplied to the oil cooler 36 and the radiator 35 as shown by an arrow in FIG. Next, the cooling air that has passed through the oil cooler 36 and the radiator 35 flows around the hydraulic oil tank 34 toward the control valve group 33 and the hydraulic pump 32. The cooling air that has cooled the control valve group 33 from the surroundings is discharged to the outside,
The cooling air that has cooled the hydraulic pump 32 passes through the periphery of the engine 31 and is discharged to the outside.

As described above, according to the present embodiment, it is possible to obtain substantially the same functions and effects as those of the above-described first embodiment. However, according to the present embodiment, the hydraulic pump 32, the control valve group 33, and the hydraulic oil tank 34 are arranged closer to each other, so that the piping connecting these can be further shortened. Workability during work can be improved.

Next, FIG. 6 shows a third embodiment of the present invention. The feature of the present embodiment is that a cooling fan, an oil cooler, and a radiator are arranged at the front and rear intermediate portions of the revolving frame, and are shifted to the right side together with the hydraulic pump, and a hydraulic oil tank is arranged at the front side thereof. Control valve group on the side. In the present embodiment, the same components as those in the first embodiment are given the same reference numerals,
The description is omitted.

Reference numeral 41 denotes an engine according to the present embodiment. The engine 41 is an engine 10 according to the first embodiment.
In the same manner as in the above, the rear of the driver's seat 7 and the counterweight 5
Of the cylinder case 4 on the revolving frame 4
1A is mounted in a horizontal state extending leftward and rightward.

Reference numeral 42 denotes a hydraulic pump according to the present embodiment, which is attached to the right end of the engine 41 and is driven by the engine 41. The hydraulic pump 42 is similar to the hydraulic pump 11 according to the first embodiment. The control valve group 4, which will be described later, is disposed on the right side of the turning frame 4 in the left and right directions.
3. Connected to the hydraulic oil tank 47.

Reference numeral 43 denotes a control valve group according to the present embodiment, which is disposed on the turning frame 4 on the right side of the hydraulic pump 42. The control valve group 43 is a control valve group according to the first embodiment. As in the case of No. 16, it is constituted by a plurality of control valves.

Reference numeral 44 denotes a radiator as a heat exchanger according to the present embodiment, which is provided on the front side of the control valve group 43 and provided in the front and rearward intermediate portions of the revolving frame 4, and the radiator 44 is a first radiator. Like the radiator 12 according to the embodiment, it is connected to the engine 41. Further, the radiator 44 is disposed laterally along the right skirt cover 6D.

An oil cooler 45 is provided adjacent to the rear side of the radiator 44 as a heat exchanger according to the present embodiment. The oil cooler 45 is different from the oil cooler 13 according to the first embodiment. Similarly, the control valve group 43,
It is connected to a hydraulic oil tank 47.

The cooling fan 46 is separated from the engine 41 and provided on the back side of the oil cooler 45 according to the present embodiment. The cooling fan 46 is similar to the cooling fan 14 according to the first embodiment. , A blade section 46A and a motor section 46B serving as a driving source, and are attached to the radiator 44 via, for example, legs (not shown).

Reference numeral 47 denotes a hydraulic oil tank according to the present embodiment, which is located on the front side of the cooling fan 46 and the like, and is disposed near the front right side of the revolving frame 4.
Like the hydraulic oil tank 15 according to the embodiment, the hydraulic oil is stored in the hydraulic pump 42.

The hydraulic shovel according to the present embodiment has the above-described configuration. Next, the flow of cooling air when the cooling fan 46 is driven will be described.

First, when the cooling fan 46 is driven to rotate,
Since the cooling fan 46 is of an exhaust type, as shown by the arrow in FIG. 6, the front side of the hydraulic oil tank 47, the left side of the engine 41,
Outside air is drawn in from the right side of the control valve group 43 as cooling air. Thereby, the cooling air sucked from the front side of the hydraulic oil tank 47 cools the hydraulic oil tank 47 from the surroundings.
Cooling air drawn from the left side of the engine 41 flows around the engine 41 and the hydraulic pump 42 to cool them. Further, the cooling air sucked from the right side of the control valve group 43 cools the control valve group 43 from the surroundings. Then, the hydraulic oil tank 47, the hydraulic pump 42, the control valve group 43
Is supplied from the cooling fan 46 to the oil cooler 45 and the radiator 44, and is discharged to the outside after cooling the working oil and the engine cooling water.

Thus, according to the present embodiment configured as described above, it is possible to obtain substantially the same functions and effects as those of the above-described first embodiment.

Next, FIG. 7 shows a fourth embodiment of the present invention. This embodiment is characterized in that the engine is disposed obliquely on the revolving frame, and the cooling fan, oil cooler, and radiator are disposed at the front and rear intermediate portions of the revolving frame, and are shifted to the right with the hydraulic pump. That is, the control valve group is arranged on the front side, and the hydraulic oil tank is arranged on the rear side. Note that, in the present embodiment, the first
The same reference numerals are given to the same components as those of the embodiment, and the description thereof will be omitted.

Reference numeral 51 denotes an engine according to the present embodiment. The engine 51 is an engine 10 according to the first embodiment.
In a manner similar to the above, it is mounted on the turning frame 4 at a position behind the driver's seat 7 and in front of the counterweight 5. However, the engine 51 according to the present embodiment is different from the engine 10 according to the first embodiment in that the cylinder case 51A is disposed so as to be gradually inclined rearward from left to right. It is different.

Reference numeral 52 denotes a hydraulic pump according to the present embodiment, which is attached to the right end of the engine 51 and is driven by the engine 51. The hydraulic pump 52 is similar to the hydraulic pump 11 according to the first embodiment. The revolving frame 4 is disposed on the right side in the left and right directions, and is connected to a hydraulic oil tank 53 and a control valve group 57 described later.

Reference numeral 53 denotes a hydraulic oil tank according to the present embodiment, which is located on the right side of the hydraulic pump 52 and is provided near the rear right side of the revolving frame 4. The hydraulic oil tank 53 is the same as the hydraulic oil tank 53 according to the first embodiment. Like the hydraulic oil tank 15, it stores hydraulic oil to be supplied to the hydraulic pump 52.

Reference numeral 54 denotes a radiator as a heat exchanger according to the present embodiment, which is provided at the front side of the hydraulic oil tank 53 and at the front and rearward intermediate portions of the turning frame 4. The radiator 54 is a first radiator. Like the radiator 12 according to the embodiment, it is connected to the engine 51. Further, the radiator 54 is disposed laterally along the right skirt cover 6D.

An oil cooler 55 is provided adjacent to the rear side of the radiator 54 as a heat exchanger according to the present embodiment. The oil cooler 55 is different from the oil cooler 13 according to the first embodiment. Similarly, the hydraulic oil tank 5
3. Connected to the control valve group 57.

Reference numeral 56 denotes a cooling fan according to this embodiment, which is separated from the engine 51 and provided on the back side of the oil cooler 55. The cooling fan 56 is similar to the cooling fan 14 according to the first embodiment. , A blade section 56A and a motor section 56B, which are attached to the radiator 54 via, for example, legs (not shown).

Reference numeral 57 denotes a control valve group according to the present embodiment, which is located on the front side of the cooling fan 56 and the like and is disposed near the front right side of the turning frame 4. The control valve group 57 is the first embodiment. Like the control valve group 16 according to the embodiment, the control valve group 16 includes a plurality of control valves.

The hydraulic excavator according to the present embodiment has the above-described configuration. Next, the flow of cooling air when the cooling fan 56 is driven will be described.

First, when the cooling fan 56 is driven to rotate,
Since this cooling fan 56 is of an exhaust type, outside air is sucked in as cooling air from the front side of the control valve group 57, the left side of the engine 51, and the right side of the hydraulic oil tank 53, as shown by arrows in FIG. Thereby, the cooling air sucked from the front side of the control valve group 57 cools the control valve group 57 from the surroundings. Cooling air drawn from the left side of the engine 51 flows around the engine 51 and the hydraulic pump 52 to cool them. Further, the cooling air sucked from the right side of the hydraulic oil tank 53 cools the hydraulic oil tank 53 from the surroundings. Then, the control valve group 57, the hydraulic pump 52, the hydraulic oil tank 53
Is supplied from the cooling fan 56 to the oil cooler 55 and the radiator 54, and is discharged to the outside after cooling the working oil and the engine cooling water.

Thus, according to the present embodiment configured as described above, it is possible to obtain substantially the same operation and effects as those of the above-described first embodiment, and furthermore, it is also possible to apply the engine 51 to the revolving frame 4. Can be arranged freely.

Next, FIG. 8 shows a fifth embodiment of the present invention. The feature of the present embodiment is that the engine is disposed obliquely on the turning frame, and the cooling fan, oil cooler, and radiator are arranged on the rear side of the turning frame, and are displaced to the right together with the hydraulic pump, and on the front side thereof. hydraulic oil tank, lies in placing the control valve group. 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 61 denotes an engine according to the present embodiment. The engine 61 is an engine 10 according to the first embodiment.
In a manner similar to the above, it is mounted on the turning frame 4 at a position behind the driver's seat 7 and in front of the counterweight 5. However, the engine 61 according to the present embodiment is different from the engine 10 according to the first embodiment in that the cylinder case 61A is disposed so as to be gradually inclined forward from left to right. are doing. And
By gradually tilting the engine 61 from the left side to the right side, for example, the driver's seat 7 disposed above the revolving frame 4 on the front side of the engine 61 can increase the space around the driver's seat 7.

Reference numeral 62 denotes a hydraulic pump according to this embodiment, which is attached to the right end of the engine 61 and is driven by the engine 61. The hydraulic pump 62 is similar to the hydraulic pump 11 according to the first embodiment. The revolving frame 4 is disposed on the right side in the left and right directions, and is connected to a hydraulic oil tank 66 and a control valve group 67 described later.

[0098] 63 is a radiator as a heat exchanger according to the present embodiment arranged on the right rear side of the revolving frame 4 located on the right side of the hydraulic pump 62, the radiator 6
Like the radiator 12 according to the first embodiment, the radiator 3 is connected to the engine 61 and is disposed obliquely so as to be along the arc-shaped counterweight 5, the right skirt cover 6D, and the like.

An oil cooler 64 is provided adjacent to the rear side of the radiator 63 as a heat exchanger according to the present embodiment. The oil cooler 64 is identical to the oil cooler 13 according to the first embodiment. Similarly, the hydraulic oil tank 6
6. Connected to the control valve group 67.

A cooling fan 65 is separated from the engine 61 and provided on the back side of the oil cooler 64 according to the present embodiment. The cooling fan 65 is similar to the cooling fan 14 according to the first embodiment. , A blade part 65A and a motor part 65B as a drive source, which are attached to the radiator 63 via, for example, legs (not shown).

Reference numeral 66 denotes a hydraulic oil tank according to the present embodiment, which is disposed on the turning frame 4 in front of the cooling fan 65 and the like. The hydraulic oil tank 66 is a hydraulic oil tank according to the first embodiment. Similarly to 15, the hydraulic oil is stored in the hydraulic pump 62.

Reference numeral 67 denotes a control valve group according to the present embodiment, which is located on the front side of the hydraulic oil tank 66 and is located closer to the front right side of the revolving frame 4. The control valve group 67 is the first embodiment. Like the control valve group 16 according to the embodiment, the control valve group 16 includes a plurality of control valves.

The hydraulic excavator according to the present embodiment has the above-described configuration. Next, the flow of cooling air when the cooling fan 65 is driven will be described.

First, when the cooling fan 65 is driven to rotate,
Since the cooling fan 65 is of an exhaust type, outside air is drawn in from the front side of the control valve group 67 and the left side of the engine 61 as cooling air, as shown by the arrow in FIG. Thereby, the control valve group 6
Cooling air sucked from the front side of 7 cools them in circulation the periphery of the control valve group 67, the hydraulic oil tank 66. Cooling air drawn from the left side of the engine 61 flows around the engine 61 and the hydraulic pump 62 to cool them. Then, the control valve group 67, the hydraulic oil tank 66,
The cooling air that has passed through the hydraulic pump 62 is supplied from the cooling fan 65 to the oil cooler 64 and the radiator 63, and is discharged to the outside after cooling the hydraulic oil and the engine cooling water.

Thus, according to the present embodiment configured as described above, it is possible to obtain substantially the same operation and effect as the above-described first embodiment, and also, to move the engine 61 from the left side to the right side. Since it is gradually inclined toward the front side, the space around the driver's seat 7 can be expanded, and the working environment can be improved.

In the first embodiment, the hydraulic pump 11, the radiator 12, the oil cooler 13, the cooling fan 14, the hydraulic oil tank 15, and the control valve group 16 are arranged on the left and right sides of the turning frame 4 in the left and right directions. Although the case where the hydraulic pump 1 is provided has been described as an example, the present invention is not limited to this.
1, radiator 12, oil cooler 13, cooling fan 1
4. The hydraulic oil tank 15, the control valve group 16
May be arranged on the left side in the left and right directions. This configuration can be similarly applied to other embodiments.

Further, in the first embodiment, the radiator 12 and the oil cooler 13 have been described as examples of the heat exchanger. However, the present invention is not limited to this, and the aggregator and the supercharger of the air conditioner are used. The present invention may be applied to a heat exchanger such as an intercooler used for the above. This configuration can be similarly applied to other embodiments.

On the other hand, in each embodiment, a swing type excavator in which a working device 3 is attached to the front end of an upper revolving unit 2 so as to be able to swing (swing) left and right is used as a swing type construction machine. However, the present invention is not limited to this, and may be applied to, for example, an offset hydraulic excavator that translates an arm or a bucket of a working device in the left and right directions. Further, the present invention may be applied to a general hydraulic excavator not provided with a swing mechanism and an offset mechanism.

In each of the embodiments, the case where the present invention is applied to a hydraulic excavator having a canopy 22 that covers the upper side of the driver's seat 7 has been described as an example. The present invention may be applied to a hydraulic excavator having a cab box.

Further, in each of the embodiments, the track-type hydraulic excavator has been described as an example of the revolving type construction machine. However, the present invention is not limited to this. The present invention can be applied to other swing type construction machines.

[0111]

As described in detail above, according to the first aspect of the present invention, the hydraulic pump is arranged to be shifted to one side of the left and right directions of the revolving frame, and the cooling fan is separated from the engine and is separated from the engine. Is driven by another power source,
Since the cooling fan and the heat exchanger are arranged on one side of the left and right directions of the turning frame together with the hydraulic pump, the hydraulic pump and the heat exchanger can be arranged close to each other. Reduce the length of the suction pipe that sucks hydraulic oil from the oil tank to the hydraulic pump, the discharge pipe that discharges hydraulic oil from the hydraulic pump to the control valve, and the pipe that connects the heat exchanger to the hydraulic oil tank and the control valve. Can be. As a result, handling at the time of connecting the pipes can be facilitated and workability can be improved. Further, the noise can be reduced by separating the pipe from the driver's seat, and the space around the driver's seat can be increased, so that the working environment can be improved.

Further, by separating the cooling fan from the engine, the cooling fan and the heat exchanger can be arranged without being restricted by the engine. Therefore, the cooling fan, the heat exchanger, The devices and the like can be arranged side by side on one side of the revolving frame in a free relationship, and the degree of freedom in the arrangement relationship of the hydraulic pump, heat exchanger, and cooling fan can be increased. Moreover, these can be efficiently arranged by the upper revolving superstructure, and the upper revolving superstructure can be reduced in size.

According to the second aspect of the present invention, the hydraulic pump is disposed on one side in the left and right directions of the turning frame, and the cooling fan is separated from the engine and driven by a power source different from the engine. Since the cooling fan, the heat exchanger, and the hydraulic oil tank are arranged with one side of the left and right sides of the turning frame together with the hydraulic pump, the hydraulic pump, the heat exchanger, and the hydraulic oil tank are connected to each other. They can be arranged close to each other, and the length of a suction pipe for sucking hydraulic oil from the hydraulic oil tank to the hydraulic pump, a pipe connecting the heat exchanger and the hydraulic oil tank, and the like can be reduced. As a result, handling at the time of connecting the pipes can be facilitated and workability can be improved. Further, the noise can be reduced by separating the pipe from the driver's seat, and the space around the driver's seat can be increased, so that the working environment can be improved.

Further, by separating the cooling fan from the engine, the cooling fan, the heat exchanger, the hydraulic oil tank, and the like can be arranged on the right side of the revolving frame with the hydraulic pump attached to the engine as a center. Therefore, the degree of freedom in the arrangement relationship of the hydraulic pump, the heat exchanger, the cooling fan, and the hydraulic oil tank can be increased. Moreover, these can be efficiently arranged by the upper revolving superstructure, and the upper revolving superstructure can be reduced in size.

According to the third aspect of the present invention, the hydraulic pump is arranged on one side in the left and right directions of the turning frame, and the cooling fan is separated from the engine and driven by a power source different from the engine. The cooling fan, the heat exchanger, and the control valve are located on the left side of the turning frame together with the hydraulic pump.
Since it is arranged to be shifted to one side in the right direction, the hydraulic pump, heat exchanger and control valve can be arranged in the vicinity,
The length of the discharge pipe for discharging the pressure oil from the hydraulic pump to the control valve, the pipe connecting the heat exchanger and the control valve, and the like can be reduced. As a result, handling at the time of connecting the pipes can be facilitated and workability can be improved. Further, the noise can be reduced by separating the pipe from the driver's seat, and the space around the driver's seat can be increased, so that the working environment can be improved.

Further, by separating the cooling fan from the engine, the cooling fan, the heat exchanger, the control valve, and the like can be arranged on the right side of the turning frame with the hydraulic pump attached to the engine as a center. Can, hydraulic pump,
The degree of freedom in the arrangement of the heat exchanger, the cooling fan, and the control valve can be increased. Moreover, these can be efficiently arranged by the upper revolving superstructure, and the upper revolving superstructure can be reduced in size.

According to the fourth aspect of the present invention, the hydraulic pump is disposed on one side of the left and right sides of the revolving frame, and the cooling fan is separated from the engine and driven by a power source different from the engine. Since the cooling fan, the heat exchanger, the hydraulic oil tank, and the control valve are arranged on one side of the left and right sides of the turning frame together with the hydraulic pump, the hydraulic pump, the heat exchanger, and the hydraulic oil are arranged. A tank and a control valve can be arranged in the vicinity, a suction pipe for sucking hydraulic oil from the hydraulic oil tank to the hydraulic pump, a discharge pipe for discharging pressure oil from the hydraulic pump to the control valve, a heat exchanger and a hydraulic oil tank,
The length of the pipe connecting the control valve can be reduced. As a result, handling at the time of connecting the pipes can be facilitated and workability can be improved. Further, the noise can be reduced by separating the pipe from the driver's seat, and the space around the driver's seat can be increased, so that the working environment can be improved.

Further, by separating the cooling fan from the engine, the cooling fan, the heat exchanger, the hydraulic oil tank, the control valve, etc. are shifted to the right side of the turning frame, centering on the hydraulic pump mounted on the engine. It is possible to arrange the hydraulic pump, the heat exchanger, the cooling fan, the hydraulic oil tank, and the control valve to increase the degree of freedom of the arrangement relationship.
Moreover, these can be efficiently arranged by the upper revolving superstructure, and the upper revolving superstructure can be reduced in size.

According to the fifth aspect of the present invention, the rear side of the upper revolving structure is formed in an arc shape with respect to the center of rotation, and the heat exchanger is arranged on the rear side of the revolving frame so as to follow the arc shape of the upper revolving structure. The heat exchanger can be efficiently arranged without forming a useless space with respect to the outer shape of the upper revolving structure having an arc shape, and the space on the revolving frame can be effectively used. Thus, the size of the upper swing body can be reduced.

According to the sixth aspect of the present invention, a counterweight is provided at the rear end of the turning frame, and the engine is provided in a horizontal position in which the cylinder case is located in front of the counterweight and the cylinder case extends left and right. However, since the heat exchanger is disposed obliquely to the direction in which the cylinder case of the engine extends, even when the engine is mounted horizontally on the revolving frame, heat is not restricted by this mounting structure. The exchanger can be arranged on the right side of the revolving frame in a one-sided manner in consideration of space saving, workability, and the like, and the degree of freedom in designing can be improved.

According to the seventh aspect of the present invention, a driver's seat is provided on the revolving frame near one side in the left and right directions, and a hydraulic pump, a cooling fan, and a heat exchanger are provided in the left and right directions with the driver's seat. Since it is located on the opposite side, the piping connected to the hydraulic pump can be connected avoiding the lower side of the driver's seat, reducing the noise around the driver's seat and improving the working environment it can. Further, since the hydraulic pump, the cooling fan, and the heat exchanger are arranged on the side opposite to the driver's seat, a space can be provided around the driver's seat, and in this respect, the working environment can be improved. it can.

[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 a right side view of the hydraulic excavator of FIG. 1 as viewed from the front side with a working device omitted.

FIG. 3 is a plan view showing a configuration of the upper-part turning body according to the first embodiment with an engine cover, a driver's seat, and the like removed.

FIG. 4 is a plan view schematically showing the configuration of the upper swing body according to the first embodiment together with the flow of cooling air.

FIG. 5 is a plan view schematically showing a configuration of an upper rotating body according to a second embodiment together with a flow of cooling air.

FIG. 6 is a plan view schematically showing the configuration of an upper-part turning body according to a third embodiment together with a flow of cooling air.

FIG. 7 is a plan view schematically showing the configuration of an upper-part turning body according to a fourth embodiment together with a flow of cooling air.

FIG. 8 is a plan view schematically showing a configuration of an upper rotating body according to a fifth embodiment together with a flow of cooling air.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 4 Revolving frame 5 Counter weight 6 Exterior cover 7 Driver's seat 10, 31, 41, 51, 61 Engine 10A, 31A, 41A, 51A, 61A Cylinder case 11, 32, 42, 52, 62 Hydraulic pumps 12, 35, 44, 54, 63 Radiators (heat exchangers) 13, 36, 45, 55, 64 Oil coolers (heat exchangers) 14, 37, 46, 56, 65 Cooling fans 15, 34, 47, 53, 66 Hydraulic oil tank 16, 33, 43, 57, 67 Control valve group 17 Suction pipe 18 Discharge pipe 19, 20 Return pipe 21 Bypass pipe O Swivel center

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazunori Yamada 1-2, Sasagaoka, Mizuguchi-machi, Koka-gun, Shiga Prefecture Inside the Shiga Plant of Hitachi Construction Machinery Tierra (72) Shogo Kimura Shoga Kimura, Sasa-Mizuguchi-machi, Koga-gun, Shiga Prefecture 1-22 Inventor Naohiro Ishikawa 1-2 Sasagaoka, Mizuguchi-machi, Koka-gun, Shiga Prefecture F-term in Hitachi Construction Machinery Tierra Shiga Plant (Reference) 2D015 CA02

Claims (8)

[Claims] 1. A self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, wherein the upper revolving body is mounted on a revolving frame and the revolving frame. A rotary construction machine including an engine, a hydraulic pump driven by the engine, a cooling fan that generates cooling air, and a heat exchanger that cools a fluid by cooling air from the cooling fan; The pump is arranged on one side of the left and right directions of the revolving frame, and the cooling fan is separated from the engine and driven by a power source different from the engine. The cooling fan and the heat exchanger are A revolving construction machine, wherein the revolving construction machine and the hydraulic pump are arranged so as to be offset to one side of the revolving frame in the left and right directions. 2. A self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, wherein the upper revolving body is mounted on a revolving frame and the revolving frame. An engine, a hydraulic pump driven by the engine, a cooling fan for generating cooling air, a heat exchanger for cooling fluid by cooling air from the cooling fan, and an operation for storing hydraulic oil supplied to the hydraulic pump In a revolving construction machine including an oil tank, the hydraulic pump is arranged to be offset to one side of the revolving frame in a left or right direction, and the cooling fan is separated from an engine and has a different power from the engine. The cooling fan, the heat exchanger, and the hydraulic oil tank are arranged with the hydraulic pump together with one side in the left and right directions of the revolving frame. Revolving construction machine. 3. A self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, wherein the upper revolving body is mounted on a revolving frame and the revolving frame. An engine, a hydraulic pump driven by the engine, a cooling fan that generates cooling air, a heat exchanger that cools fluid by cooling air from the cooling fan, and an actuator that compresses hydraulic oil discharged from the hydraulic pump. in pivoting construction machine comprising a control valve for supplying and discharging the said hydraulic pump is left of the revolving frame, arranged biased on one side of the right direction, the cooling fan and the engine is disconnected from the engine Is configured to be driven by another power source, and that the cooling fan, the heat exchanger, and the control valve are arranged with one side in the left and right directions of the turning frame together with the hydraulic pump. Features a swiveling construction machine. 4. A self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, wherein the upper revolving body is mounted on a revolving frame and the revolving frame. An engine, a hydraulic pump driven by the engine, a cooling fan for generating cooling air, a heat exchanger for cooling fluid by cooling air from the cooling fan, and an operation for storing hydraulic oil supplied to the hydraulic pump In a revolving construction machine comprising an oil tank and a control valve for supplying and discharging hydraulic oil discharged from the hydraulic pump to an actuator, the hydraulic pump is biased to one of left and right sides of the revolving frame. The cooling fan is separated from the engine and driven by a power source different from the engine. The cooling fan, the heat exchanger, the hydraulic oil tank, and the control valve are provided with the hydraulic pressure. A revolving construction machine characterized in that the revolving frame and the pump are arranged on one side of the revolving frame to the left or right. 5. A rear portion of the upper revolving structure is formed in an arc shape with respect to a center of rotation, and the heat exchanger is provided on a rear side of the revolving frame so as to follow the arc shape of the upper revolving structure. The swiveling construction machine according to claim 1, 2, 3, or 4. 6. A counterweight is provided at a rear end of the turning frame, and the engine is provided in a horizontal state in which a cylinder case extends leftward and rightward with the engine positioned in front of the counterweight. The swiveling construction machine according to claim 1, 2, 3, 4, or 5, which is disposed obliquely to a direction in which a cylinder case of the engine extends. 7. A driver's seat is provided on the revolving frame near the other side in the left and right directions, and the hydraulic pump, the cooling fan,
The swiveling construction machine according to claim 1, 2, 3, 4, 5, or 6, wherein the heat exchanger is disposed on the opposite side of the driver's seat from left and right. 8. The swivel type heat exchanger according to claim 1, wherein the heat exchanger is a radiator for cooling the cooling water of the engine or an oil cooler for cooling the working oil. Construction machinery.