JPH0434098Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine intake system for construction machinery vehicles.

[Conventional technology]

FIG. 4 is a side view showing a part of a construction machine, FIG. 5 is an explanatory view showing a conventional precleaner installed state, and FIG. 6 is an explanatory view showing a conventional internal/external air switching device. In the construction equipment vehicle shown in the figure, which consists of a vehicle body a, an engine room b, an air cleaner c, and a precleaner d, in normal use, the precleaner d supplies air to the engine from outside the engine room b. During snowfall, especially in snowy regions, consideration has been given to eliminating the suction of snow by drawing air from the engine room through the precleaner d as shown in Figure 5.

[Problem that the invention attempts to solve]

However, even in seasons when there is no more snowfall, the engine compartment continues to draw in air.

In addition, as shown in Fig. 6, there is a type that switches between inside and outside air, but it has the disadvantage of being complicated in structure and high in cost.

[Means for solving problems]

The purpose of the present invention is to provide an engine intake system that eliminates the above-mentioned drawbacks, and its features include a pipe of the air cleaner body extending upward from one end side attached to the air cleaner body in the engine room; One end is attached to the precleaner above the engine room, and the other end is slidably fitted to the pipe of the air cleaner main body, so that when the precleaner comes into contact with the engine hood opening, the air in the engine room is removed. It is equipped with a pre-cleaner pipe that allows the air to be drawn into the engine to be switched between inside and outside air.

[Effect]

In this case, (1) pushing in the precleaner switches from outside air intake to intake from inside the engine room, depending on seasonal conditions; (2) both inside and outside air can be taken in through the precleaner; Easy to operate.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of the intake device according to the present invention, FIG. 2 is an explanatory diagram showing the operating state of the device in FIG. 1, and FIG. 3 is an explanatory diagram showing the engaged state of the stopper. be.

In the figure, the device consists of a precleaner 2, a switching device B, and an air cleaner body C.

The pipe 1 is a precleaner pipe that is fitted into the precleaner 2 and is integrated with the precleaner 2.

The pipe 3 is a pipe of the air cleaner main body that is fitted and fixed to the air suction pipe 4 of the air cleaner main body C.

The cylindrical spring 5 serves to push up the precleaner 2 together with the pipe 1 to the state shown in FIG.

The operation in the case of the above configuration will be described.

As shown in FIG. 2, during winter snowfall, the pipe 1 is pushed in together with the pre-cleaner 2, and the pre-cleaner 2 is pressed against the upper surface of the engine hood 6 to suck air from the engine room.

At this time, a plurality of fasteners 7 are provided on the outer periphery of the collar 8 of the pipe 3 to fix the pipe 3 and the pipe 1.

In FIG. 1, when the stopper 7 is released, the pipe 1 is pushed up by the tension of the spring 5, the collar 9 of the pipe 1 is pressed against the inner surface of the engine hood 6, and the pipe 1 is further fixed by the plurality of fasteners 10. This puts the precleaner 2 in a state where it can suck in outside air.

[Effect of idea]

The above case has the following effects.

(1) Precleaner 2 is always used even if the internal/external air switching type is used.
Because it is inhaled, it has a great dust collection effect.

(2) Compared to the fixed internal air intake type shown in Fig. 5, the present invention does not cause a decrease in engine performance due to fresh air intake from the outside, except during snowfall.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the intake device according to the present invention, FIG. 2 is an explanatory diagram showing the operating state of the device in FIG. 1, and FIG. 3 is an explanatory diagram showing the engaged state of the stopper. FIG. 4 is a side view showing a part of a conventional construction machine, FIG. 5 is an explanatory view showing a conventional precleaner installed state, and FIG. 6 is an explanatory view showing a conventional inside/outside air switching device. 1... Precleaner pipe, 2... Precleaner, 3... Air cleaner main body pipe, 6...
Engine hood, C... Air cleaner body.

Claims (1)

[Scope of utility model registration request] A pipe of the air cleaner main body extends upward from one end attached to the air cleaner main body in the engine room, one end is attached to the precleaner above the engine room, and the other end can be slid onto the pipe of the air cleaner main body. A construction characterized in that the precleaner has pipes that are fitted together to take in air from the engine room when the precleaner comes into contact with the engine hood opening, thereby switching air intake into the engine from inside and outside. Engine intake system for mechanical vehicles.