JP2010090626A - Engine intake device for construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the maintainability and the flexibility in the layout design of the intake pipe of an engine and to prevent engine noise from diverging to the outside. <P>SOLUTION: In this engine intake device for a construction machine in which the engine 13 is disposed in an engine room 11 behind a cab 4, the engine 13 and an air cleaner 19 are joined to each other through an intake pipe 16, and part of the passage from the air cleaner 19 to the intake pipe 16 is installed so as to project to the outside of the engine room 11. Part of the passage from the air cleaner 19 and the intake pipe 16 is fixed with a bracket 20 to cut off the vibration transmitted from the engine 13 at the fixed position of the bracket 20, thereby preventing the engine noise from diverging to the outside. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an engine intake device for a construction machine, and more particularly to an engine intake device for a construction machine in which an engine is disposed in an engine room behind a cab.

  2. Description of the Related Art Conventionally, in a construction machine such as this type of hydraulic excavator, a cab 22 is provided at the front portion of an upper swing body 21 mounted on a lower traveling body (not shown) as shown in FIG. An engine room 23 is formed behind the cab 22, and an auxiliary machine (not shown) such as an engine 24 and a hydraulic pump is disposed in the engine room 23.

An intake pipe 25 is connected to the engine 24, and an air cleaner 26 is attached to the upstream side of the intake pipe 25. The air cleaner 26 captures and removes foreign matters such as dust in the air so that clean air can be supplied to the engine 24 (see FIG. 3 of Patent Document 1).
JP 2004-239122 A

  In the above prior art, since the air cleaner and the intake pipe as the engine intake device are arranged in a narrow engine room, the maintainability of the air cleaner and the intake pipe deteriorates during maintenance, and in addition, the air cleaner and the intake pipe There was a problem that the degree of freedom in the layout design of piping was low.

  Further, there has been a problem that vibration generated from the inside of the engine accompanying the operation of the engine is transmitted to the intake pipe, and vibration noise is easily diffused outside the engine room via the intake pipe.

  Therefore, there is a technical problem to be solved in order to improve the maintainability of the engine intake device and the degree of freedom in layout design, and prevent the spread of engine noise, and the present invention solves this problem. Objective.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is characterized in that the engine is disposed in the engine room behind the cab, and the engine and the air cleaner are connected to each other via an intake pipe. An engine air intake apparatus for a construction machine, which is connected to the engine, is provided with a part of the air cleaner and / or the intake pipe so as to protrude outside the engine room.

  According to this configuration, since a part from the air cleaner to the intake pipe is provided so as to protrude outside the engine room, an operator can remove a part of the air cleaner and / or the intake pipe from the outside of the engine room during maintenance inspection. Maintenance inspection becomes possible.

  According to a second aspect of the present invention, there is provided an engine intake device for a construction machine according to the first aspect, wherein a part of the intake pipe is fixed by a bracket.

  According to this configuration, a part of the intake pipe is fixed by the bracket. Therefore, vibration transmitted from the inside of the engine to the intake pipe is suppressed by the bracket fixing portion, so that the diffusion of engine vibration noise is effectively blocked.

  According to the first aspect of the present invention, since a part of the engine intake device including the air cleaner and the intake pipe can be easily maintained and inspected from the outside of the engine room, workability during maintenance of the engine intake device is remarkably improved.

  In addition, since a part of the engine intake device is disposed in the space behind the cab, the space can be used effectively and the degree of freedom in designing the layout of the engine intake device can be increased.

  Since the engine vibration sound transmitted to the intake pipe can be effectively cut off at the fixing portion by the bracket, the invention according to the second aspect has the effect of the invention according to the first aspect, in addition to the effect of the engine vibration sound outside the engine room. Prevents diffusion and improves quietness when the engine is running.

  The present invention aims to improve the maintainability of the engine intake system and increase the degree of freedom in layout design, and to achieve the objectives of preventing the diffusion of engine vibration noise and realizing effective use of space. An engine intake device for a construction machine, in which an engine is disposed in a room and the engine and an air cleaner are connected via an intake pipe, wherein a part of the air cleaner and / or the intake pipe is disposed outside the engine room. It was realized by providing it to protrude.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a side view of a hydraulic excavator 1 as a construction machine to which the present invention is applied. In the drawing, an upper swing body 3 is mounted on the lower traveling body 2 so as to be rotatable, and a cab 4 is mounted on one front side of the upper swing body 3. In addition, a work machine is placed at the front center part of the upper swing body 3, and the work machine includes a boom 5, an arm 6, a bucket 7 and various drive cylinders 8, 9, 10.

  The boom 5 is attached to the front center portion of the upper swing body 3 so as to be able to be raised and lowered, and an arm 6 is pivotally attached to the tip portion of the boom 5 so as to be vertically rotatable. Further, a bucket 7 is pivotally attached to the tip of the arm 6 so as to be rotatable up and down.

  An engine room (machine room) 11 is provided behind the cab 4, and the engine room 11 is covered with a cover 12. Further, the engine room 11 is provided with an engine 13, for example, an electronic injection control type diesel engine.

  FIG. 2 is a block diagram illustrating an engine 13 including an engine intake device according to the present invention. As shown in the figure, a fuel tank 14 is connected to the engine 13, and a hydraulic pump 15 is connected to the output shaft of the engine 13.

  An intake pipe 16 and an exhaust pipe 17 are connected to the engine 13, and a turbocharger 18 is interposed between the intake pipe 16 and the exhaust pipe 17.

  Further, an air cleaner 19 is attached upstream of the intake pipe 16. A part of a pipe line (hereinafter referred to as “engine intake system pipe line”) H from the air cleaner 18 to the engine side connecting part (downstream part) of the intake pipe 16 protrudes outside the upper part of the engine room 11. It is provided as follows.

  That is, an opening 11A is formed at a position corresponding to a part of the engine intake system pipe H in the upper part of the engine room 11, and a part of the engine intake system pipe H protrudes upward from the opening 11A. Is provided. An opening / closing cover (not shown) can be detachably attached to the opening 11A.

  FIG. 3 shows an example in which a part of the intake pipe 16 is projected behind the cab 4. As shown in FIG. 4, a bracket 20 is fixed to the projecting portion of the intake pipe 16 by welding, and the bracket 20 is a fixing member (not shown) such as a frame provided on the engine room 11. It is fastened and fixed detachably by a fixing tool such as a bolt.

  As described above, according to the present invention, since a part of the engine intake system pipe H constituting the air cleaner 19 to the intake pipe 16 is provided so as to protrude outside the upper part of the engine room 11, the engine intake system pipe H Maintenance work can be easily performed.

  At the time of maintenance and inspection of the engine intake line H, for example, when the air cleaner 19 or the intake pipe 16 is attached or detached, the operator can work from the outside of the engine room 11 in a free working posture, so the air cleaner 19 or the intake pipe 16 can be easily attached and detached or exchanged. Therefore, the workability of maintenance of the air cleaner 19 or the intake pipe 16 is remarkably improved.

  Further, a part of the engine intake system pipe line H can be laid out at an arbitrary place in the space behind the cab 4. Therefore, the space can be effectively used, and the degree of freedom in designing the layout of the engine intake system pipe H is greatly improved.

  In addition, by disposing a part of the engine intake system pipe H that has been arranged in the engine room 11 in the conventional example outside the engine room 11, a part corresponding to a part of the engine intake system pipe H is provided. Only the space in the engine room 11 is substantially increased. In particular, since the space in the engine room 11 near the radiator device (not shown) increases, the space can be effectively used for other purposes.

  When the bracket 20 is fixed to a part of the intake pipe 16 by welding as in the embodiment, and the bracket 20 is fixed to the frame in the engine room 11, the bracket 20 is fixed. Vibration transmitted to the intake pipe 16 is suppressed.

  Thus, by suppressing the vibration transmitted to the intake pipe 16, it is possible to effectively block the vibration sound generated inside the engine 13 from diffusing outside the engine room 11. Therefore, since the present invention has a remarkable noise reduction effect, the quietness when the engine 13 is operated is remarkably improved.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

1 is an overall side view of a hydraulic excavator as a construction machine according to an embodiment of the present invention. The block diagram explaining the engine provided with the engine intake device which concerns on one Example. The perspective view which shows the protrusion part of the engine intake device which concerns on one Example. The rear view of the engine intake device of FIG. Side surface explanatory drawing which shows the upper turning body by which the engine provided with the conventional engine intake device was mounted.

Explanation of symbols

1 Excavator (construction machine)
3 Upper Revolving Body 4 Cab 11 Engine Room 12 Cover 13 Engine 16 Intake Pipe 19 Air Cleaner 20 Bracket H Engine Intake System Line

Claims (2)

  An engine intake device for a construction machine, in which an engine is disposed in an engine room behind a cab and the engine and an air cleaner are connected via an intake pipe, wherein the air cleaner and / or a part of the intake pipe is connected to the engine cleaner. An engine air intake device for a construction machine, wherein the engine air intake device is provided so as to protrude outside the engine room.   The engine intake device for a construction machine according to claim 1, wherein a part of the intake pipe is fixed by a bracket.

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