JPH0734207Y2 - Air ram hood that doubles as a precleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to intake intake of a vehicle-mounted engine, and more specifically, air flowing in from an intake opening opened in a forward direction during traveling is connected to the intake intake. The present invention relates to an air / ram hood having a function of separating and removing dust, rainwater, and the like mixed in inflowing air by an inertial collision action by changing the direction and sending the air to a downwardly extending air conduit.

[Prior Art] This type of air / ram hood, which has been used more often than before, is effective for separating and removing dust, rainwater, etc. while traveling, and when installed at a high position with respect to the engine mounted on the vehicle. Air that is relatively dust-free can be sucked in, and air can be pushed in during driving to reduce ventilation resistance, which is effective in improving engine output and fuel efficiency.

[Problems to be solved by the invention] However, depending on the vehicle, not only traveling,
Especially in the case of heavy vehicles such as dump trucks, it often operates at a low speed in a dusty environment, and it is customary to use a pre-cleaner and an air cleaner together in addition to the air ram hood, which deteriorates the dust separation function except when driving. There is.

Therefore, during operation other than running, these increase ventilation resistance, increase the ratio of occupying a limited installation space, and when the number of unit parts increases, the number of connection related parts also increases. However, there were many disadvantages such as high price.

[Means and Actions for Solving Problems] As a means for solving the above-mentioned disadvantages, the present invention has a function of a precleaner in addition to the conventional function of an air ram hood. The pre-cleaner and connection-related parts attached to it can be omitted,
The occupancy rate of the limited installation space is small.

〔Example〕

Hereinafter, a detailed description will be given based on an embodiment of the present invention with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of an equipped state, showing a separation and discharge path of dust and the like during traveling, and FIG. 4 is a front view of FIG.

The upper air intake portion 11 is fitted into the lower dust collection chamber 12 and then clamped and tightened by the clamp 14. Air intake
Reference numeral 15 is a square shape, and a relatively coarse protective net 16 is attached to the end surface which is inclined slightly downward to prevent infiltration of large dust such as leaves and paper pieces. As the upper wall 17 is gently curved from the horizontal shape to the inflow direction and is turned downward together with the lower wall 18 which is curved in an arc shape, it is the same as the outer cylinder 25 of the dust collecting chamber 12 as shown in FIG. The partition 19 which is deformed into a tubular shape having a diameter and receives the upper end of the dust collecting chamber 12 and the stepped tubular brim 20 are integrated.

The partition 19 has a dust collecting chamber 12 as shown in FIG.
Formed by a vent hole 21 that communicates with the inner cylinder 26 that is eccentric toward the front, a rear end inner circumference of the upper wall 17 at the rear, and a chord portion that is in contact with the upper rear end of the inner cylinder 26 and is perpendicular to the front-back direction. There is a half-moon shaped dust outlet 22 that does.

In the lower wall 18 of the air intake port 15, the passage after the inflow is gradually narrowed along the shape of the upper wall 17 with its tip as a base point, and the upper and lower walls are moved while keeping contact with both side walls. A curved air guide plate 23 is inserted up to the end of the outlet 22 that matches the half-moon chord portion, and a plurality of louvers that horizontally open in the horizontal direction toward the leeward side of the inflow air are provided on the plate surface. 24 are arranged, and the front and rear ends and both side ends of the baffle plate 23 are partially adhered and fixed to the inner wall of the air intake portion 11.

The dust collecting chamber 12 is an eccentric portion of the outer cylinder 25, and an inner cylinder 26 that integrates the portions where the side walls are connected to each other, and a mortar-like inclined outer cylinder that is connected to the outer wall of the inner cylinder 26 to form an integral outside. A reservoir chamber 28 is formed by the bottom wall 27 of the cylinder 25, and an elastic plate valve 30 is installed that covers and closes a rectangular discharge port 29 provided at the rear of the bottom wall 27 from the outside and opens with wind pressure from the inside. Has been done.

The inner tube 26 end having a plurality of slots 31 shown in FIG.
Air conduit 33 deeply inserted into the inner upper step of this
The whole is held by tightening and fixing with a clamp 32.

Further, the air intake portion 11 is of a split type so that a stepped tubular collar 20 having a plurality of slots 13 can be fitted into the dust collection chamber 12, clamped and fixed by a clamp 14, and removed at any time for cleaning.

In the case of a vehicle operating in a dusty environment, the engine's load operation can be continued by working at a low speed for traveling or while the vehicle is stopped, and intake air flows in from the air intake port 15 due to negative pressure. However, large dust such as leaves and pieces of paper is prevented from entering by the protective net 16 and proceeds in the direction of the arrow shown in FIG. A large amount of mixed dust, rainwater, and the like pass through the upper surface of the baffle plate 23 due to inertia, collide with the rear curved inner surface of the upper wall 17 and then descend, and then fall into the sump chamber 28 via the dust outlet 22, but the bottom wall. The discharge port 29 provided in 27 is a plate valve 30 due to negative pressure.
It is not released because it is blocked by.

The inflowing air is reversed from the opening of the louver 24 provided in the baffle plate 23, so that the infiltrated dust is separated and the ventilation port 21
Through an air conduit 33 to an air cleaner (not shown).

When the vehicle is running, much dust, rainwater, etc. collide with the rear curved inner surface of the upper wall 17 as described above, and then reach a reservoir 28 accompanied by a part of the inflowing air, and a relatively large discharge port 29. Board valve
30 is pushed open, and the dust and other things that have accumulated are released all at once.

The clean air, which is reversed from the opening of the louver 24 and is pushed in, reduces the ventilation resistance to the engine by the pushing force.

[Advantages of the Invention] 1) The conventional air ram hood mainly focuses on the separation function during traveling, but the present invention does not prevent the vehicle from operating at low speed or when traveling. ,
Regardless of the time of operation, as a precleaner, it can not only prevent the intrusion of bulky dust and separate rainwater, but it can also perform the function of separating fine dust.

2) When the air ram hood is running, the amount of air pushed in is large, so if the discharge port of dust etc. is small, the separated substance will be disturbed and rise up, and it will be sucked into the engine side. The device of the present invention has a shape in which a part of the forced air is easily discharged together with separated dust and the like, and a relatively large discharge port is provided on the bottom wall at the end of the flow path to block the air. Since the plate valve that pushes open and discharges dust and the like that have accumulated, it is possible to prevent dust from rising and improve the separation efficiency.

3) Since the air intake part and the dust collecting chamber of the present invention can be attached and detached by clamping, the cleaning of each can be facilitated.

4) By using a simple structure as a precleaner, a single unit precleaner and its related components can be omitted, which not only reduces costs but also occupies a limited installation space. .

Although the above description is based on an embodiment of the present invention, it is needless to say that the concept of the present invention can be variously modified and modified without being limited thereto.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of the equipment of the present invention during running, FIG. 2 is a cross-section 2-2 in FIG. 1, FIG. 3 is a cross-section 3-3 in FIG. 1, and FIG. The front view of the equipment of the present invention is shown. 11: Air intake part, 12: Dust collection chamber, 23: Air guide plate, 24: Louver, 30: Plate valve,

Claims (1)

[Scope of utility model registration request] 1. An air ram hood having a shape in which air that flows in horizontally from a frontward intake port is gently curved after it has flowed in to change its direction downwards and is then sent to a vertical air conduit. The air intake part 11 of the half part and the dust collecting chamber 12 of the lower half part are detachable as a separable type. 2) The dust collecting chamber 12 of the lower half part is flush with the outer cylinder 25 of large diameter and the upper end. The inner walls of the small-diameter inner cylinders 26 are eccentric so that the side walls of the inner cylinders 26 overlap each other toward the front and are integrated, and the space formed by the outer wall of the inner cylinder 26 and the inner wall of the outer cylinder 25 serves as a reservoir chamber 28, and the outer cylinder 25 is its mortar. The bottom wall 27 inclined in a shape is joined slightly above the lower end of the inner cylinder 26, and an outlet 29 is provided at the rear center of the bottom wall 27, and the outside of the outlet 29 is affected by wind pressure from the inside. The reservoir chamber 28 equipped with the elastic plate valve 30 having a push-open structure forms the dust collecting chamber 12 in a state of surrounding the inner cylinder 26, and 3) the upper half Air-intake unit 11, intake port 15 is in the square,
A coarse mesh 16 is attached so as to cover the square end face, and the upper wall 17 of the intake port 15 is gradually curved downward from the horizontal direction toward the air inflow direction, and the lower portion curved in an arc shape. It gradually deforms from a square shape together with the wall 18 to a cylindrical shape having the same diameter as the dust collecting chamber 12, and the downward end forms a stepped cylindrical collar 20 to be fitted on the outer periphery of the upper end of the dust collecting chamber 12. Then, a partition wall 19 that abuts the upper end of the dust collection chamber 12 is provided inside the upper portion of the tubular brim 20, and this has a ventilation port that communicates with the inner cylinder 26 of the dust collection chamber 12.
21 and a half-moon shaped dust outlet that is formed by opening a straight open end adjacent to the rear of the upper end of the outer wall of the inner cylinder 26 and at a right angle to the front-rear direction, and forming a cylindrical inner wall of the air intake part 11. 22 is provided, and 4) the lower wall 18 at the square-shaped intake port 15 of the air intake unit 11.
A baffle plate 23 having the entire width of the inner lower end as a base point is fixed to the inner wall of the inner wall as the air passages flowing in through the intake port 15 are further advanced. With the contact, the dust outlet 22 is curved to the end corresponding to the crescent chord of the dust outlet 22, and the inflowing air is guided to the dust outlet 22. A plurality of louvers 24 that are open horizontally in the leeward direction are arranged. An air ram hood that is also used as a precleaner.