JP2500225Y2 - Air introduction device for engine type industrial vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an air introduction device of a type in which a hollow head guard pillar is used as an air intake pipe for an engine in an engine type industrial vehicle such as a forklift or a shovel loader. .

(Prior Art) Generally, in this type of industrial vehicle, a type in which a head guard pillar is used as an air intake pipe is adopted from the intention of incorporating as clean air as possible into the engine.

This uses one (usually the rear side) of the hollow pillars that support the head guard as an air intake pipe as shown in FIG. 5, and is formed on the upper side surface of the head guard pillar 21. By attaching an intake box 23 having a downward intake port 22 for intake of outside air to the opened opening and connecting the lower side of the head guard pillar 21 to an air cleaner 25 by an air introduction pipe 24, the dust mixing rate can be reduced. The low air is introduced from the head guard pillar 21 through the air introduction pipe 24 into the air cleaner 25 for purification, and then supplied to the engine.

(Problems to be solved by the invention) However, according to the air introduction device as described above, the dust having a relatively large particle size among the dust in the intake air is separated from the intake air while flowing down in the head guard pillar 21. Then, even if they are deposited on the bottom of the pillar, there is a problem that as the amount of deposition gradually increases, they float and are absorbed again on the air cleaner side.

In view of the above problems, the present invention provides an air introduction device for an engine type industrial vehicle that efficiently captures dust and appropriately discharges the dust after capture.
To that end.

(Means for Solving the Problems) In order to solve the above problems, the present invention is configured as follows.

In other words, an engine-type industry that uses the head guard pillar as an air intake pipe by connecting the lower side of a hollow head guard pillar with an intake port for taking in outside air to the air cleaner for the engine from the air introduction pipe. In an air introducing device for a vehicle, the opening of the air introducing pipe in the head guard pillar is set at a predetermined height position from the bottom surface of the pillar, while the bottom of the head guard pillar serves as a dust accommodating portion, and the same dust accumulating portion is formed. The liquid for trapping dust is filled to a predetermined level, and a liquid inlet / outlet for exchanging the liquid is provided.

(Operation) In the air introducing device configured as described above, the dust separated from the intake air sucked into the head guard pillar through the intake port is separated from the liquid accumulated in the dust accumulating portion at the bottom of the pillar ( For example, the dust that is trapped by the oil), and the dust that has been trapped is settled in the liquid or immersed in the liquid, if not settling, thereby avoiding being sucked into the cleaner side.
Further, the dust accumulated in the liquid in the dust reservoir can be treated by carrying out the liquid exchange at a proper time, if necessary.

(Example) Hereinafter, an example of the present invention will be specifically described with reference to the drawings.

First, the embodiment shown in FIGS. 1 to 3 will be described. As shown in the figure, the head guard pillar 2 that is erected on the vehicle body frame 1 and is used as an air intake pipe is formed in a cylindrical shape (or a rectangular tube shape) and has a rectangular opening on the outer surface of the upper part. 3, the air intake box 4 is attached to the opening 3.

The intake box 4 is composed of a rectangular box portion 4a arranged outside the head guard pillar 2 and a cylindrical portion 4b inserted and arranged in the head guard pillar 2 through the opening 3, and is provided at a lower portion of the rectangular box portion 4a. Is opened for intake of outside air,
A cyclone fin 6 is provided below the cylindrical portion 4b, and the rectangular box portion 4a and the cylindrical portion 4b are connected by a venturi 7. The air intake box 4 having such a configuration is fixed to the head guard pillar 2 by bolts or other suitable fixing means in a state where the cylindrical portion 4b is inserted into the head guard pillar 2.

On the other hand, the lower portion of the head guard pillar 2 has an air conduit 8
It is connected to the air cleaner 9 via. The air introduction pipe 8 is composed of a pipe 8a bent at about 90 degrees at least on the side connected to the head guard pillar 2, and has a circular hole formed at a predetermined height from the bottom surface of the head guard pillar 2. It is inserted and fixed in the pillar through the. The suction port 8b of the pipe 8a is opened upward at a predetermined height from the bottom surface of the pillar, and the head guard pillar 2
The outer peripheral surface of the pillar has a predetermined distance from the inner peripheral surface of the pillar.

Further, the bottom of the head guard pillar 2 is a dust reservoir 11 filled with the liquid 10 for capturing dust. That is, an injection block 14 having an injection port 13 with an injection plug 12 is fixed to the lower rear portion of the head guard pillar 2 by welding, and the liquid 10 injected from the injection port 13 is held in the dust reservoir 11. The level lower than the through hole of the pipe 8a is satisfied as an appropriate level. The injection block
A graduated transparent glass (or resin) 15 is provided on the scale 14 so that the liquid level in the dust reservoir 11 can be visually recognized. Further, a drain block 18 having a discharge port 17 with a discharge plug 16 is fixed by welding to the lower surface of the vehicle body frame 1 forming the bottom surface of the dust collecting section 11 so that liquid can be drained if necessary. It is possible.

As the dust-trapping liquid 10, for example, used engine oil, hydraulic oil for hydraulic machines, or the like can be used, and water may be used in some cases.

The air introduction device of the present embodiment is configured as described above, and therefore the air sucked from the intake port 5 of the intake box 4 flows into the cylindrical portion 4b side through the venturi 7 as shown by the arrow in the figure. Further, as a result, the swirling flow is generated by flowing out into the head guard pillar 2 through the cyclone fin 6. In this case, the venturi 7 can effectively generate the swirling flow by accelerating the flow velocity of the intake air.

Then, the dust with a relatively large particle size in the intake air is
By the action of the centrifugal force due to the swirling flow, it is carried out downward along the inner wall surface of the pillar. Therefore, invasion of dust into the suction port 8b of the air introduction pipe 8 which is concentrically opened in the center of the head guard pillar 2 is avoided or reduced. Thus, the clean air from which a certain amount of dust has been removed is sucked into the air cleaner 9 through the air introduction pipe 8, where it is further purified and then sucked to the engine side.

On the other hand, the dust that has separated and dropped from the intake air is captured by the liquid 10 filled in the dust reservoir 11, and the captured dust will be immersed in the liquid or, if not, will be immersed in the liquid. In this case, the dust may simply stay at the bottom of the pillar and re-suspend and be sucked into the air introducing pipe 8.
It is possible to prevent the dust of 11 from being suspended and avoid suction to the air introduction pipe 8.

Then, as the captured dust accumulates, the dust reservoir 11
Since the liquid level of the liquid will gradually increase, the liquid glass 10 for dust capture can be replaced with a new liquid by visually observing the degree of increase of the liquid level through the transparent glass 15 periodically or when necessary. It can be dealt with by exchanging with.

Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment, the intake box 4 does not have a cyclone fin, that is, a downward intake port 5 for intake of outside air.
A simple shape having only one is used, and the suction port 8b of the air introducing pipe 8 is laterally opened to the inner side surface of the head guard pillar 2, and further, an injection port 13 for a liquid 10 for capturing dust, The transparent glass 15 for visually recognizing the liquid level is directly attached to the lower portion of the head guard pillar 2.

Therefore, in this embodiment, compared with the above-mentioned embodiment, even if the separating action of dust in the intake air is slightly inferior,
It is advantageous in that the head guard pillar 2 is not limited to a cylindrical shape but can be a general square tube shape.

(Effect of the Invention) As described in detail above, according to the present invention, dust that has once separated from the intake air in the head guard pillar and has fallen to the bottom of the pillar is reliably captured, and it is suspended. It is possible to prevent the air cleaner from being sucked into the air cleaner side again, and it is possible to discharge the captured dust as needed, which reduces clogging of the air cleaner and prolongs its life extension effect. It will be effective in raising it.

In addition, it is not possible to utilize the used engine oil or hydraulic oil of the hydraulic machine as the liquid for capturing the dust, and the device of the present invention can be easily manufactured by slightly modifying the existing head guard pillar. There are also advantages.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the air introducing device of the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. Is a vertical sectional view showing another embodiment of the present invention, and FIG. 5 is a vertical sectional view showing a conventional example in which the head guard pillar is used as an air intake pipe. 1 ... Body frame, 2 ... Head guard pillar 4 ... Air intake box, 8 ... Air introduction tube 9 ... Air cleaner, 10 ... Liquid 11 ... Dust reservoir, 13 ... Inlet 17 ... Outlet

Claims (1)

(57) [Scope of utility model registration request] 1. A type in which the lower side of a hollow head guard pillar having an intake port for taking in outside air is connected to an air cleaner for an engine by an air introduction pipe and the head guard pillar is used as an air intake pipe. In the air introduction device for an engine type industrial vehicle, the opening of the air introduction pipe in the head guard pillar is set at a predetermined height position from the bottom surface of the pillar, while the bottom portion of the head guard pillar serves as a dust reservoir, An air introduction device for an engine type industrial vehicle in which the reservoir is filled with a liquid for capturing dust at a predetermined level and provided with a liquid inlet / outlet for liquid exchange.