JPH0546528U - Air intake duct equipment for construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the sound deadening effect and cooling performance without lowering workability during inspection and maintenance of the engine room of construction machinery. [Structure] A door 35 of an engine compartment 27 is provided with a duct 35 that penetrates vertically. The door 29 is hingedly connected to the machine body so that it can be easily opened and closed. A floor duct 40 is provided in the engine room 27. The intake 41 of the floor duct 40 is aligned with the lower exhaust 37 of the duct 35 of the door 29. The exhaust port 42 of the floor duct 40 is arranged in the lower front portion of the radiator 32. The sound absorbing material 38 is attached to the inner surfaces of the duct 35 and the floor duct 40. The noise propagating from the engine compartment 27 to the outside is reduced by the duct 35 and the floor duct 40.
The outside air flowing in through the duct 35 and the floor duct 40 is
The air is blown to the lower part of the radiator 32, and the entire surface of the radiator 32 is effectively cooled.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an intake duct device for a construction machine, and more particularly to an intake structure for cooling an engine.

[0002]

[Prior Art]

 An intake structure for an engine room of a conventional construction machine will be described with reference to FIGS. FIG. 5 shows an engine room 2 provided in a frame 1 of an upper revolving structure such as a hydraulic excavator. An engine 3, a radiator 4, and various auxiliary machines (not shown) are attached to the frame 1, and an upper cover 5 is used. It is covered.

Doors 6 and 7 are provided on both left and right sides of the upper cover 5 so that the engine compartment can be inspected and maintained. The outside air for cooling the radiator 4 is introduced into the engine compartment by providing intake ports A, B, and C in the upper cover 5 or the floor plate 8 or the door 6. It is also known that a duct 12 is provided on a panel 11 as shown in FIG. 6, and a sound absorbing material 13 is attached to the inside of the duct 12 to reduce the amount of propagation of engine noise to the outside.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional intake structure, if the intake port A is provided only on the upper surface of the upper cover 5, the amount of outside air flowing into the lower portion of the radiator 4 becomes insufficient, which causes overheating. When the door 6 is provided with the intake port B, the air can be blown to the entire surface of the radiator 4, but there is a problem that the noise emission amount in the engine chamber 2 is large. When air is taken in from the floor plate 8, dust and earth and sand during work are sucked and adhere to the radiator 4 and cause overheating.

On the other hand, in the duct having the duct structure shown in FIG. 6, it is not easy to secure the duct length, and the duct becomes large in size in order to achieve a sufficient silencing effect and an intake amount. Therefore, if a panel provided with a duct is attached to the machine body by a hinge, the panel cannot be opened and closed. Therefore, it is necessary to connect the panel to the machine body with bolts or the like, which impairs the workability during the inspection and maintenance of the engine.

Therefore, there are technical problems to be solved in order to achieve low noise without impairing the workability of inspection and maintenance and to secure sufficient cooling performance to improve workability. The purpose is to solve this problem.

[0007]

[Means for Solving the Problems]

 This invention is proposed in order to achieve the above-mentioned object.A floor duct is provided in the engine compartment, and an intake port of the floor duct is provided on the floor surface of the door opening of the engine compartment. An exhaust port for the floor duct is installed, and a vertical duct is provided in the door of the engine room.The lower exhaust port of the door and the intake port of the floor duct are aligned with each other when the door is closed. An air intake duct device for a construction machine is formed so that the engine chamber communicates with the outside through an upper air intake port of a door.

[0008]

[Action]

 The floor duct in the engine room has an intake port provided at an opening of a door provided in the engine room and an exhaust port provided in the engine room. The door is provided with a vertical duct, and when the door is closed, the lower exhaust port matches the floor duct intake port. Since the duct intake port at the top of the door is exposed to the outside, the engine room and the outside air communicate with each other through the floor duct and the door duct.

By appropriately setting the position of the exhaust port of the floor duct, it is possible to optimally control the blowing direction to the radiator surface. In addition, the noise reduction effect of the cooling fan and the like is reduced by the noise reduction effect of the door duct and floor duct.

[0010]

【Example】

 An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows a hydraulic excavator 21 in which a revolving frame 23 is pivotally attached to a lower traveling body 22 so as to be horizontally rotatable. A cab 24 and a boom 25 are mounted on the revolving frame 23, and a power mechanism such as an engine is arranged at the rear of the cab 24 and covered by an upper cover 26. Doors 29, 30 are attached to the left and right sides of the engine room 27 via hinges 28, 28. A counterweight 31 is provided at the rear end of the revolving frame 23.

2 and 3 show a door 29 on the radiator 32 side, in which a duct 35 is formed by door panels 33 and 34 of two inner and outer plates, an intake port 36 is provided in an upper part, and an exhaust port 37 is provided in a lower part. A sound absorbing material 38 such as glass wool is stuck on the entire surface in the duct 35. FIG. 4 is a view taken along the line BB of FIG. As shown in the figure, the inner door panel 34 of the door 29 contacts the side edge portion of the upper cover 26 with the door 29 closed, and the upper intake port 36 of the door 29 is exposed to the outside of the room.

On the other hand, a floor duct 40 is formed on the lower surface of the floor plate 39 attached to the swivel frame 23, and an opening is provided near the side edge of the floor plate 39 to serve as an intake port 41, and an exhaust port is provided near the radiator 32. 42 is opened. A sound absorbing material 38 is attached to the inner surface of the floor duct 40, like the duct 35 of the door 29. The size of the intake port 41 of the floor duct 40 is the same as the size of the exhaust port 37 of the door 29, and the exhaust port 37 and the intake port 41 of the floor duct are formed to coincide with each other when the door 29 is closed. Further, a seal member 43 made of elastic rubber or the like is attached around the exhaust port 37 of the door 29 or around the intake port 41 of the floor duct 40 so that the space between the exhaust port 37 and the intake port 41 is set as shown in FIG. Seal the void. An intake port 44 is provided on the upper left side of the upper cover 26, and an exhaust port 45 is provided on the upper right side.

When the door 29 having the above-described structure is closed, the duct 35 of the door 29 and the floor duct 40 communicate with each other and become integrated, so that the outside air can be introduced to the lower portion of the radiator 32. When the engine 46 is started, the cooling fan 47 rotates, and the outside air sucked through the intake port 44 of the upper cover 26 passes through the upper and central portions of the radiator 32 and is sucked through the intake port 36 of the door 29. The outside air passes under the radiator 32 through the exhaust port 42 of the floor duct 40, and the radiator 32 is entirely cooled. The hot air that has passed through the radiator 32 passes through the inside of the engine room 27 and is discharged from the exhaust port 45 of the upper cover 26.

Since the duct 35 of the door 29 and the floor duct 40 are connected in this manner, a sufficient total duct length can be obtained while the duct 35 of the door 29 has a simple structure, and the door 29 having the duct 35 is provided. The thickness of the door can be formed so that it can be hinge-connected, and the door 29 is hinge-connected to the machine body, thereby achieving both noise reduction performance and ease of maintenance. The present invention is not limited to the above-described embodiment, and noises radiated from the intake port 44 are provided by attaching a sound absorbing material to the outside of the inner panel 34 of the door 29 or the outer peripheral surface of the lower portion of the floor duct 40, for example. Can be further reduced. The invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that the invention covers those modifications.

[0015]

[Effect of the device]

 As described in detail in the above-mentioned embodiment, the present invention can introduce sufficient outside air to the lower part of the radiator by means of the door duct and the floor duct, so that both cooling efficiency and soundproofing performance can be improved. Also, since the door duct and floor duct are connected to secure the length of the duct, the door duct structure is simplified, weight increase and size reduction are suppressed, and it is formed as a hinged joint that can be opened and closed. As a result, it is possible to obtain a good silencing effect without degrading the maintainability of the engine room.

Further, by improving the cooling efficiency, it is possible to reduce the size of the radiator, the cooling fan, etc., and various effects such as contributing to cost reduction are exhibited.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic excavator.

FIG. 2 is a perspective view of a door.

FIG. 3 is an end view taken along the line AA of FIG.

FIG. 4 is a view as seen from the direction of arrows BB in FIG. 1 showing an engine compartment.

FIG. 5 is an explanatory diagram showing a conventional engine compartment.

FIG. 6 is an explanatory view showing a conventional engine compartment.

[Explanation of symbols]

 21 Hydraulic Excavator 26 Upper Cover 27 Engine Room 28 Hinge 29 Door 32 Radiator 33, 34 Door Panel 35 Duct 36 Intake Port 37 Exhaust Port 38 Sound Absorbing Material 39 Floor Plate 40 Floor Duct 41 Inlet Port 42 Exhaust Port 43 Sealing Member 44 Inlet Port 45 Exhaust Port 46 engine 47 cooling fan

Claims (1)

[Scope of utility model registration request] 1. A floor duct is provided in an engine room, an intake port of the floor duct is provided on a floor surface of a door opening of the engine room, and an exhaust port of the floor duct is provided in the engine room. We installed a vertical duct on the door of
An intake duct for a construction machine formed such that a lower exhaust port of the door and an intake port of the floor duct are aligned with each other while the door is closed, and the engine room and the outside are communicated with each other through an upper intake port of the door. apparatus.