JPH1044791A - Installation mechanism of engine or the like in travel working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the back visibility by lowering an engine cover, to reduce the noise for the easy operation, and to make the maintenance operation of the engine and hydraulic driving part easy. SOLUTION: Plural purlines 4 are projected in the longitudinal direction at a center of a machine base having a travelling unit, of a travel working machine, a hydraulic unit such as an engine 7, a hydraulic pump 8 or the like, are installed on the machine base in the longitudinal direction along one side of the purlines 4, a driver's seat 15 is installed at the other end of the purlines 4, and a cooling device 10 comprising a radiator for cooling the engine 7, a cooler for cooling the hydraulic unit, or the like, is installed inside of the purlines at the rear part of the machine base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement of an engine, a hydraulic device, a cooling device and the like on a machine base in a traveling work machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 6, 7, and 8, a traveling work machine having a front working unit such as a hydraulic excavator for performing heavy excavation work is provided at a central portion of a machine base 3 having a traveling device 2. A plurality of vertical girders 4 (auxiliary ribs) to which the working unit 5 is attached are protruded at a predetermined height in the front-rear direction, so that the machine base 3 has a sufficient strength.

[0003] As shown in FIGS. 7 and 8, an engine 7 mounted on the traveling work machine 1 is provided at the rear of the machine base 3 so as to straddle above the stringers 4 and the engine 7
Is horizontally provided with a gap so as not to contact the stringer 4, and a counterweight 6 is provided at the rear thereof.
Therefore, the height of the engine hood 9a and the like that covers the engine 7 is formed higher than the cover 9 that covers other devices. The radiator 10a and the cooler 10b for cooling the hydraulic oil are arranged so as to be cooled by a fan 10c driven by a belt from the crankshaft of the engine 7.

[0004]

However, in the above-described conventional arrangement of the engine 7, the hydraulic pump 8, and the related equipment, the engine hood 9a covering the engine 7 is such that the engine 7 is installed above the stringer 4. Driver's seat 1
5 is protruded high behind, which hinders the rear view of the operator, making it difficult to perform the operation, and involves a problem with danger.

Further, since the fan 10c of the cooling device 10 is directly belt-conducted from the engine 7, if the fan 10c is rotated at a high speed to increase the cooling air flow in order to increase the cooling efficiency, the rotation of the engine 7 is rotated at a high speed. However, there is a drawback that the heat balance performance is inconvenient, resulting in difficulty in efficient cooling, and that the noise level increases and it is difficult to perform comfortable work.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a low engine cover to improve rear visibility, reduce noise, facilitate work, and maintain the engine and hydraulic drive parts. It is an object of the present invention to provide an arrangement mechanism of an engine or the like in a traveling work machine capable of easily performing an operation.

[0007]

According to the first aspect of the present invention, an arrangement mechanism for an engine or the like in a traveling work machine according to the present invention includes a plurality of longitudinal beams projecting in the front-rear direction at the center of a machine having a traveling device. In the traveling work machine installed, an engine, a hydraulic pump, and the like are provided on the machine base in a front-rear direction along one side of the stringer, and a driver's seat is installed on the other side of the stringer, A cooling device comprising a radiator for cooling the engine, a cooler for cooling the working oil, and the like is provided inside the longitudinal girder and behind the machine base.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory view showing a plan view of a machine base configuration of a hydraulic shovel showing an embodiment of the present invention, and FIG.
FIG. 3 is an arrow view showing a cross section along the line A, and FIG.
FIG. 4 is a schematic explanatory view showing a state in which a right side surface of FIG. 1 is partially broken, and FIG. 5 is a hydraulic shovel to which an arrangement mechanism such as an engine in a traveling work machine of the present invention is applied. FIG.

As shown in FIG. 5, a traveling work machine according to an embodiment of the present invention, ie, a hydraulic excavator 1, horizontally rotates a machine base 3 as a swing frame to a crawler type traveling device 2 via a swivel bearing device 2a. As shown in FIG. 1, vertical beams 4 with an interval H are provided at the center of the machine 3 as shown in FIG.
A front working part 5 having a bucket 5a is attached to the front end of the vertical girder 4, 4 which is raised forward and the back is lowered, and a counter wight which also serves as a bumper is provided at the rear. 6 stands on the machine width.

[0010] Then, as shown in FIGS.
A hydraulic pump 8 directly connected to the engine 7 via a connecting member 7a is mounted in the front-rear direction along the right side of the stringer 4, and these are hermetically covered with a cover 9 having an appropriate air outlet. ing. Reference numeral 7b denotes an intake pipe of the engine 7, and an exhaust pipe 7c is inserted into a hole 6a formed in the counterweight 6 to exhaust while suppressing noise. Reference numeral 9c denotes a blower that blows air into the cover 9 via a wind guide tube 9b.

A cooling device 10 is provided between the left and right vertical beams 4 and 4 and the counterweight 6 at the rear. This cooling device 10 forms a discharge opening 10e provided at the same height as the upper surface of the cover 9 in a side view (FIG. 3) on the upper surface of the radiator 10a for the engine 7, and has a cooler for cooling hydraulic oil at the lower portion thereof. 10b and a fan 10c are sequentially provided.

The fan 10c is provided with a motor 10d for cooling adjustment, and a hydraulic drive motor is provided below the fan 10c. These are provided in a partition wall 13 communicating with the cooling device 10. In addition, intake ports 13a and 13b are opened below and in front of the partition wall 13, and a hydraulic valve 12 is provided in front thereof. Reference numeral 15 denotes a driver's seat having various operating devices. In the present embodiment, a cabin type is installed on the machine base 3 on the left front side of the stringer 4 and at the rear thereof, between the counter weight 6 and the electrical equipment. 1
6, a fuel tank 17, a hydraulic tank 18 and the like are sequentially arranged.

A hydraulic device 8a such as an engine 7 and a hydraulic pump 8 is provided on one side of the stringer 4 in the front-rear direction, and a cover 9 covered by these is installed as low as possible behind the driver's seat 15. . Since the embodiment of the present invention is configured as described above, when the engine 7 is started and the airframe is operated, the air blown by the drive of the blower 9c flows in one direction along the inner wall of the cover 9, and the engine 7 and the hydraulic pump The hot air staying around 8 is swept out and cooled.

By driving the fan 10c (FIG. 3) for the cooling device 10, the cooling air is sucked in the cool air from the intake ports 13a and 13b, and the cooler 10b and the radiator 1 are cooled.
0a is sequentially and accurately cooled, and then discharged from the discharge opening 10e. Accordingly, it is possible to prevent the exhaust air having the hot air from flowing into the cover 9 of the engine to impair the cooling efficiency.
The motor 10d is satisfactorily performed by the motor 10d so as to maintain a heat balance adapted to various work rotations of the engine 7 without being restricted by the rotation of the engine 7. Therefore, it is possible to perform comfortable work such as excavation while suppressing noise.

The operator is provided with a hydraulic device 8a such as an engine 7 and a hydraulic pump 8 provided on one side of the longitudinal beam 4 which is arranged in parallel at an interval, so that a cover 9 for covering them is provided. Since it is installed as low as possible behind the driver's seat 15, the rear visibility is improved, and it becomes easy to perform the work accurately and safely. In addition, the maintenance work of the engine 7, the hydraulic device 8a, and the like requires that the equipment can be installed at a lower position than the machine base 3 by the above configuration.
Since these operations are performed by opening a series of covers 9 on one side of the fuselage, maintenance and inspection work can be performed very easily without being hindered by the counterweight 6 erected at the rear of the fuselage. .

[0016]

As described above in detail, according to the arrangement of the engine in the traveling work machine according to the first aspect of the present invention, a plurality of stringers are provided at the center of the machine base having the traveling device in the front-rear direction. In the traveling work machine protruding from, the engine and a hydraulic pump and the like are provided on the machine base in the front-rear direction along one side of the stringer, and a driver's seat is installed on the other side of the stringer. Since a cooling device including a cooling radiator for the engine and a cooler for cooling the working oil is provided inside the stringer and at the rear of the machine base, a hydraulic device such as the engine and the hydraulic pump includes: Since the radiator and the hydraulic oil cooler can be accurately installed separately from the engine in the front-rear direction on the side of the body of the stringer facing the driver's seat, the cooling efficiency is improved. Noise suppressed In it is possible to carry out a comfortable work.

Further, the engine, the hydraulic device, and the like can be installed at a position lower than the machine base, and these can be maintained by opening a series of the covers on one side of the machine body. Since it is possible, work such as maintenance and inspection can be facilitated without being hindered by the counterweight standing upright on the rear part of the machine body. Further, the radiator, the hydraulic oil cooler, and the like can be accurately cooled at a position separate from the engine, and noise can be suppressed while improving cooling efficiency.

Further, since the cover for covering the engine and the like is installed as low as possible behind the driver's seat and the rear view is improved, the operator sitting in the driver's seat can control the operation of the aircraft in a very comfortable manner. You can work comfortably, safely and efficiently. Further, there is an advantage that the maintenance work of the engine, the hydraulic device, and the like can be performed at a position lower than the airframe and that the maintenance work is performed intensively from one side of the airframe.

[Brief description of the drawings]

FIG. 1 is a view illustrating one embodiment of the present invention, and is a plan view of a machine base configuration of a hydraulic shovel.

FIG. 2 is an arrow view showing a cross section along the line AA in FIG. 1;

FIG. 3 is an arrow view showing a cross section along the line BB of FIG. 1;

FIG. 4 is a schematic explanatory view showing a state in which a right side surface of FIG. 1 is partially broken.

FIG. 5 is a left side view showing a hydraulic excavator to which an arrangement mechanism such as an engine in the traveling work machine of the present invention is applied.

FIG. 6 is an explanatory view showing a plane of a machine base configuration of a conventional hydraulic shovel.

FIG. 7 is an arrow view showing a cross section along the line CC of FIG. 6;

FIG. 8 is a left side view showing a partially broken state of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling work machine (hydraulic excavator) 2 Traveling device 3 Machine stand 4 Stringer 5 Front working part 6 Counterweight 7 Engine 7a Connecting tool 7b Intake pipe 7c Exhaust pipe 8 Hydraulic pump 9 Cover 9a Engine hood 9b Blower pipe 9c Blower 10 Cooling device 10a Radiator 10b Cooler 10c Fan 10d Motor 10e Discharge opening 12 Hydraulic valve 13 Partition wall 13a Inlet 13b Inlet 15 Driver seat 16 Electrical equipment 17 Fuel tank 18 Hydraulic tank

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Keiji Numata New Caterpillar Mitsubishi Co., Ltd. 1-3-2 Kitaaoyama, Minato-ku, Tokyo

Claims (1)

[Claims] 1. A traveling work machine in which a plurality of stringers are protruded in the front-rear direction at the center of a machine having a traveling device, wherein an engine, a hydraulic pump, and the like are provided on one side of the machine. Alongside the stringer, a driver's seat is installed on the other side, and a radiator for cooling the engine and a cooler for cooling hydraulic oil are provided inside the stringer and at the rear of the machine stand. An arrangement mechanism for an engine or the like in a traveling work machine, wherein a cooling device is provided.