JPH09112369A - Engine intake device for construction machine or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a space and to facilitates reduction of the generation of noise of the intake system of an engine without increasing a first cost. SOLUTION: An air cleaner 11 having an intake port 11a is attached to the intermediate part of a box type frame constituting member 10c of which a car body frame 10 consists, and one end part of an intake piping 12 is coupled. The other end part of the intake piping 12 is coupled to an engine arranged in a car body frame 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine intake device for a construction machine or the like in which an engine is installed on a vehicle body frame.

[0002]

2. Description of the Related Art FIG. 3 is a plan view showing a main body of a conventional hydraulic excavator partially sectioned. An operator's cab 2 is installed in the front part of the vehicle body frame 1, and a counterweight 3 is installed in the rear end part. An engine 5 is mounted in an engine room 4 provided on the body frame 1, and an air cleaner 7 is attached to an air cleaner room 6 formed on the body frame 1. The engine 5 and the air cleaner 7 are connected by an intake pipe 8. The air sucked into the air cleaner 6 flows into the engine 5 through the intake pipe 8.

As a measure against noise in such an engine intake system, a resonator such as a resonator is provided in the intake pipe 8, or a duct 9 is attached to an air cleaner 7A which directly sucks air as shown in FIG. Means such as sucking air from the entrance of the are taken.

[0004]

In the above-mentioned conventional engine intake system, the intake pipe 8 must be extended to a place where fresh air can be taken in, which requires a considerable space. Further, if noise countermeasures are provided, more space will be required and the cost will increase.

It is an object of the present invention to provide an engine intake system which requires a small space and can easily reduce the noise of the intake system of the engine without increasing the cost.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a box-shaped frame component member whose both ends are closed in a construction machine or the like in which an engine is installed on a vehicle body frame having a plurality of box-shaped frame component members. It is characterized in that an intake system passage portion of the engine is formed in an intermediate portion and the intake system passage portion is connected to the engine through an intake pipe.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIG.

The vehicle body frame 10 comprises box-shaped frame components 10a, 10b, 10c, 10d and other frame components. Both ends of the box-shaped frame constituent member 10c are closed, and an air cleaner 11 having an intake port 11a is attached to an intermediate portion thereof. Intake pipe 1
One end of 2 is connected to the middle part of the box-shaped frame component 10c, and the other end is connected to the engine 13 installed on the vehicle body frame 10. Box-shaped frame component 10c
Is the intake system passage portion 14 and the resonator portion 1 of the engine 13.
5 and 16 are formed. S indicates the length of the intake passage portion 14, and L indicates the length of the resonator portions 15 and 16, respectively.

The air sucked from the intake port 11a of the air cleaner 11 is a box-shaped frame component member 10c and an intake pipe 1.
It flows into the engine 13 via 2. The driving noise of the engine is caused by the resonator portion 15 of the box-shaped frame component 10c.
It is lowered by the action of 16.

FIG. 2 shows that the air cleaner 1 is provided with an intake port 17 provided in a wall portion at an intermediate portion of the box-shaped frame constituent member 10c.
8 shows another embodiment in which the air cleaner 18 is attached and one end of the intake pipe 12 is connected to the air cleaner 18. The air sucked from the intake port 17 flows into the engine 13 via the air cleaner 18 and the intake pipe 12. Similar to the embodiment of FIG. 1, S indicates the length of the intake system passage portion 14, and l and L indicate the lengths of the resonator portions 15 and 16, respectively.

[0011]

According to the present invention described above, the space required for the engine intake device is small, and the drive noise in the intake system passage of the engine can be easily reduced without increasing the cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention,

FIG. 2 is a perspective view showing another embodiment of the present invention,

FIG. 3 is a plan view showing a main body of a conventional hydraulic excavator with a part in section.

FIG. 4 is a perspective view showing an air cleaner for a conventional engine intake device to which a duct is attached.

[Explanation of symbols]

 10 Body Frame 10c Box-shaped Frame 11 Air Cleaner 11a Intake Port 12 Intake Piping 13 Engine 14 Intake System Road Section 15 Resonator Section 16 Resonator Section 17 Intake Port 18 Air Cleaner

Claims (3)

[Claims] 1. In a construction machine or the like in which an engine is installed on a vehicle body frame having a plurality of box-shaped frame constituent members, an intake system of the engine is provided at an intermediate portion of one box-shaped frame constituent member whose both ends are closed. An engine intake device characterized in that a passage portion is formed and an intake system passage portion is connected to an engine through an intake pipe. 2. The engine according to claim 1, wherein an air cleaner having an intake port is attached to an intermediate portion of the box-shaped frame component member, one end portion of the intake pipe is connected, and the other end portion of the intake pipe is connected to the engine. Inhaler. 3. An air inlet is provided in an intermediate wall of a box-shaped frame member, and an air cleaner is attached to the air cleaner. One end of an intake pipe is connected to the air cleaner and the other end of the intake pipe is connected to an engine. The engine intake system according to claim 1.