JPH044900Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a tilt-type cab-over type vehicle which is provided with a cab above an engine supported at the front end of a chassis, and which is mounted so as to be tiltable with respect to the chassis. The present invention relates to a vehicle, and particularly to a mounting structure for a high-snorkel type intake pipe that takes air from above the cabin roof.

Conventional technology The intake air of the engine is taken from a high position because inhaling clean air with a low temperature not only improves fuel efficiency, but also has an excellent effect on extending the life of the air cleaner and reducing indoor noise. It is hoped that

However, in order to improve the loading efficiency of large trucks and to make it easier to mount the vehicle, a streamlined design has been implemented in which a cab is installed above the engine and the cab is tilted when inspecting the engine and power line. In cabover cars,
Since the cab was on top of the engine, it was difficult to locate and install the intake pipe.

Therefore, an engine intake pipe device for a conventional tailed cab-over vehicle will be explained with reference to FIGS. 3 and 4.

In a conventional tailed cab-over type vehicle, as shown in FIG. It was a connection. However, in this connection, when the cab 6 is tilted as shown by the imaginary line, there is no cap for the intake pipe opening, so there is a risk that rainwater and dust may enter from the intake pipe opening.

As a countermeasure to this problem, a cap that is closed when the cap is tilted has been devised (see Japanese Utility Model Application No. 122621/1983). To briefly explain this conventional structure as shown in FIG. 4, a hinge 3a' is directly formed on the flange 2a' of the intake pipe 2'.
It was equipped with a cap 4' which was opened and closed by a'. When the intake pipe 2' and the shunorkel 1' are connected, the tip of the shunorkel 1' presses the lower end of the cap 4' to open it, and when the pressure from the shunorkel 1' is removed when the cap is tilted, a spring (not shown) is released. The tip 4c' of the cap 4', which is biased by the cap 4', is closed and sealed. Note that 1b' indicates an auxiliary member for sealing formed at the tip of the snorkel, and 2b' indicates a bellows-shaped dustproof member formed at the tip of the intake pipe 2'.

Problems that the invention aims to solve However, according to the conventional structure described above, although it is good that the cap closes when the cab is tilted and prevents rainwater and dust from entering, when trying to test run the engine, the cap is closed and air cannot be taken in. Therefore, there was an inconvenience that the engine would not operate.

Therefore, the purpose of this invention is to prevent rainwater and dust from entering through the intake pipe opening by providing a cap that closes when the cab is tilted, and also to provide an engine intake pipe device for a tail-type cab-orb vehicle that is capable of taking in the air necessary for engine operation. Our goal is to provide the following.

Means for Solving the Problems The present invention solves the above-mentioned problems, and includes a plurality of stays installed at the open end of the intake pipe where the connection separates from the lower end of the shunorkel when the cab to which the shunorkel is fixed is tilted; A plurality of caps each having a dogleg-shaped cross-section and whose portions above the bent portions are pivotally connected to the plurality of stays via hinges, a spring that always biases the upper portion of the cap in the closing direction, and a lower end of the snorkel. a snorkel end portion that presses a bent portion of the cap to open each cap against the spring force when the snorkel formed in the intake pipe is engaged with the intake pipe; a lower end of the cap that comes into contact with the outer wall surface of the intake pipe to form a seal to prevent intake air from leaking when the cap is opened by pressure; The engine intake pipe device for a tail-type cab-over vehicle is characterized in that the cap closes to cover the open end of the intake pipe, and the lower part of the cap opens to intake air.

Effect: According to the above-mentioned means, when the snorkel is separated from the intake pipe when the cab is tilted, the open end of the intake pipe is covered by the closed cap, so that rainwater, dust, etc. can be prevented from entering. Moreover, the lower part of the cap opens at the same time as the cap closes, forming an intake air flow path from below the cap to the open end of the intake pipe through between the stays.

Embodiment An embodiment of an engine intake pipe device for a tailed cab-over vehicle according to the present invention will be described with reference to FIGS. 1 to 3. FIG.

An intake pipe 2 that guides intake air to the engine via an air cleaner, and a cab roof 8 that is fixed to the cab 6.
At the connection point where the lower end of the snorkel 1 that extends upward engages, the cab 6 is in its normal position (solid line in Figure 3).
This allows the engine to take in air from a high position above the cab roof 8.
Further, when inspecting the engine, etc., the snorkel 1 is tilted together with the cab 6 and separated from the intake pipe 2, as shown by the imaginary line in FIG.

Among the connection parts of the engine intake pipe device mentioned above,
A plurality of stays 3 are provided protruding from the open end 2a of the intake pipe 2, and the tip of each stay 3 forms a hinge 3a. A portion slightly above the bent portion 4d of the cap 4, which has a doglegged cross section, is pivotally attached to the hinge 3a. Cap 4, which is divided into multiple parts,
The upper ends of each cap are always biased in the closing direction by the spring 3, so that the tips 4c of all the caps can cover the upper part of the open end 2a in a closed state. Note that the number of divisions of the cap 4 can be freely selected, such as dividing into two or four, as long as sealing is possible, and the number of stays 3 changes according to this number of divisions. In addition, a seal packing 5 is wrapped around the outer wall surface of the intake pipe 2 that the lower end 4b of the cap comes into contact with, and when the cap is opened, the lower end 4b of the cap
are brought into close contact to form a seal to prevent intake air from leaking.

On the other hand, at the lower end of the shunorkel 1, there is a shunorkel end that presses the bent portion 4d of the cap 4 from above when the shunorkel 1 and the intake pipe 2 are engaged, and opens each cap 4 against the bias of the spring 3b. A portion 1a is formed. This snorkel end 1a has a diameter that can press the cap 4 outside the fulcrum 4a of the hinge 3a and inside the bend 4d,
For example, by using a bellows or the like, when the tip 4c of the cap is open and engaged, it is made to come into close contact with the outer peripheral surface of the cap 4 to form a seal.

Therefore, when the cab 6 is in the normal position, the snorkel end 1a presses the plurality of caps 4 to open them, as shown in FIG. An intake path is formed which communicates with the air cleaner 7 through the snorkel 1, the tip 4c of the cap 4, the open end 2a of the intake pipe 2, and the intake pipe 2. Further, when the cab is tilted, as shown in FIG. 2, the snorkel 1 separates from the cap 4 and the pressure is removed, and each cap 4 closes under the force of the spring 3b, and the tips 4c come into close contact and cover the open end 2a. At the same time, the lower end 4b of the cap opens to form an intake path communicating with the air cleaner 7.

Since the engine intake pipe device has the above-described configuration, in the normal state where the shunorkel 1 and the intake pipe 2 are engaged, the tip 4c of the cap 4 opens to form an intake path, and the snorkel end 1a
Since a seal is formed between the cap 4, the lower end 4b of the cap, and the seal packing 5, there is no leakage of intake air or intrusion of rainwater from the joints. Note that the lower end of the cap 4b and the seal packing 5
The seal between the two uses the pressing force of the snorkel 1, which is convenient for simplifying the structure. In addition, when the cap is tilted, the cap 4 closes and covers the open end 2a of the intake pipe 2, preventing rainwater and dust from entering.At the same time, the lower end 4b of the cap opens, allowing intake air to flow from below the cap to the stay 3.
It flows to the open end 2a through the space between the two. Therefore, even when the cab is tilted, air can be taken in while preventing the intrusion of rainwater and dust, making it possible to test run the engine, which was not possible with conventional structures.

Effects of the invention According to the engine intake pipe device of the present invention described above, it is possible to prevent rainwater, dust, etc. from entering the intake pipe even when the cab is tilted, and to secure the intake path necessary for engine operation. It is now possible to test run the engine with the cab tilted, which has the effect of improving maintenance work efficiency.

Additionally, during normal driving, the connection between the snorkel and the intake pipe is completely sealed, allowing a sufficient amount of clean, low-temperature air to be taken in from a higher location, which has the effect of improving the life of the air cleaner and engine efficiency.

Furthermore, the seal structure is such that when the shunorkel is engaged, the lower end of the cap is brought into close contact with the outer wall of the intake pipe using the shunorkel's pressing force, so there is no need to provide a sealing mechanism separately from the cap, which has the effect of simplifying the structure. .

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the state of connection between a snorkel and an intake pipe in a tailed cab-over vehicle, and FIG. 2 is a cross-sectional view showing the state of connection and separation. FIG. 3 is a diagram showing changes in the position of the snorkel due to the tailing of the cab. FIG. 4 is a diagram showing a state of connection between a conventional snorkel and an intake pipe. 1...Sunorkel, 1a...Synorkel end, 2...Intake pipe, 3...Stay, 3a...Hinge, 3b...Spring, 4...Cap, 4b...Lower end of cap, 4d...Bending part , 5... Seal packing, 6... Cab, 7... Air cleaner, 8
...Kya Bluef, 1'...Synorkel, 2'...
...Intake pipe, 3a'...Hinge, 4'...Cap, 1
b'...auxiliary member, 2b'...dustproof member.

Claims (1)

[Scope of utility model registration request] A plurality of stays are installed at the open end of the intake pipe where the connection separates from the lower end of the above-mentioned synorkel when the cab to which the synorkel is fixed is tilted, and a portion above the bent portion is pivotally connected to each of the plurality of stays via a hinge. A plurality of caps having a dogleg-shaped cross section, a spring that always biases the upper part of the cap in the closing direction, and a spring formed at the lower end of the shunorkel that presses the bent part of the cap when the shunorkel and the intake pipe are engaged. and a snorkel end that presses each cap to open against the spring force, and when opened by the pressure of the snorkel end, it contacts the outer wall surface of the intake pipe and prevents intake air from leaking. and a lower end of the cap forming a seal to prevent the intake pipe from entering the intake pipe, and further, when the snorkel is separated from the intake pipe, the spring closes the cap to cover the open end of the intake pipe, and the lower part of the cap is open. An engine intake pipe device for a tailed cab-over vehicle, characterized in that the engine intake pipe device is configured so that air is taken into the vehicle.