JPH0444552Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention relates to a low-noise unit for a work vehicle having a boom, such as an aerial work vehicle or a truck hoe.

(2) Conventional technology In recent years, work vehicles used in urban areas, especially at night, have been required to have lower noise levels.
As described in Publication No. 53-15233, a drive unit sealed with a sound insulating material is mounted on the vehicle body, and the drive unit can be used as a power source during work without using the vehicle's engine. It is conventionally known.

(3) Problems that the invention aims to solve However, conventional work vehicles equipped with a low-noise unit mounted on the vehicle body had a boom rest that held the boom when it was retracted, which was installed separately from the low-noise unit. In addition, the air cleaner was installed in the same soundproof room as the engine, so if the temperature in the soundproof room rose due to continuous operation of the engine, the density of the air supplied to the engine would decrease. Therefore, there was a problem that the output of the engine decreased.

(4) Means for solving the problem In order to solve the above problem, the present invention provides an opening on one side of a working vehicle equipped with a working device equipped with a low-noise unit and a boom on the loading platform. An air cleaner box having the above construction is attached to the top surface of the low noise unit, and a boom rest for storing and holding the boom of the working equipment is attached to the air cleaner box.

(5) Effect With the above configuration, when storing the boom,
The boom is housed and held in a boom rest attached to the air cleaner box, and the air used for combustion in the engine of the low-noise unit during operation is supplied to the engine through an opening in the air cleaner box.

(6) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in Figure 3, the truck backhoe is
A subframe 3 is mounted on the chassis frame 2 of the vehicle body 1, and a swing base 4 is rotatably provided on the subframe 3. A boom 5, a boom 5,
An arm 6 and a bucket 7 are pivotally attached in sequence, the boom 5 swings by the expansion and contraction of a boom cylinder 8 whose both ends are pivoted to the rotation base 4 and the boom 5, and the arm 6 is pivoted at both ends to the boom 5 and the arm 6. The bucket 7 swings as the arm cylinder 9 expands and contracts, and the bucket 7 moves toward the arm 6.
The bucket cylinder 10, whose both ends are pivoted to the bucket 7, is expanded and contracted to swing. A low-noise unit 11 is provided on the front upper surface of the subframe 3 and operates as a power source for the vacuum cleaner during operation.

As shown in FIGS. 1 and 2, the low noise unit 11 includes an engine 13 attached to a base frame 12, a radiator 15 attached in front of a cooling fan 14 of the engine 13, and a radiator 15 attached to the front of a cooling fan 14 of the engine 13.
includes a hydraulic pump 1 driven by an engine 13;
6 is attached, and each of the above-mentioned devices is housed in a soundproof room 17 made of soundproofing material. On the top surface of the low noise unit 11, there is an air cleaner box 18 containing an air cleaner 19 that supplies the engine 13 with air used for combustion.
An exhaust box 21 containing a muffler 20 for exhausting the engine 13 is attached to the air cleaner box 18. The air cleaner box 18 has an opening on one side for introducing outside air, and has urethane on the inner circumferential surface for noise reduction and air filtration. is installed and air cleaner box 18
A boom rest 22 for storing and holding the arm 6 when the truck backhoe is running is attached to the top surface of the truck hoe.

With the above configuration, when the vehicle is running, the arm 6 is stored and held in the boom rest 22 attached to the air cleaner box 18 attached to the top surface of the low noise unit 11, and the truck backhoe is powered by the engine (not shown) provided in the vehicle body 1. When traveling and performing work, the engine of the vehicle body 1 is stopped, and the engine 13 of the low-noise unit 11 is driven to operate the swing base 4, boom 5, arm 6, and bucket truck using the pressure oil discharged from the hydraulic pump 16. 7 to perform excavation work.

When the low noise unit 11 is in operation, the air cleaner box 1 attached to the top of the low noise unit 11
Since outside air is always introduced by the air cleaner 19 installed in the soundproof chamber 17, the air used to burn the engine 13 of the low noise unit 11 is not affected by the temperature in the soundproof chamber 17 and can be smoothly sucked in. be done.

(7) Effects of the invention As described above, according to the invention, an air cleaner box is attached to the top of the low-noise unit, and a boom rest is attached to this air cleaner box, so a space for loading tools, etc. is secured on the vehicle body. In addition, even if the temperature inside the soundproof room increases due to continuous operation of the low-noise unit, outside air is always efficiently introduced into the air cleaner, so the engine output can be lowered without reducing the engine output. A noise unit is provided.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of a low-noise unit, FIG. 2 is a side view of the low-noise unit, and FIG. 3 is a side view showing the truck backhoe in its retracted state. 11...Low noise unit, 18...Air cleaner box, 19...Air cleaner, 22...Boom rest.

Claims (1)

[Scope of utility model registration request] In a work vehicle equipped with a working device equipped with a low-noise unit and a boom on a loading platform, an air cleaner box having an opening on one side is attached to the top surface of the low-noise unit, and the boom of the working device is stored and held in this air cleaner box. A low-noise unit for a work vehicle having a boom, which is characterized by having a boom rest attached.