JPH079692Y2 - Tilt-type vehicle engine intake pipe device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a tilt type vehicle, more specifically, a tilt type cab-over type vehicle, and a lower intake pipe fixed to a chassis and a cab detachably attached to the lower intake pipe. The present invention relates to an improvement of an engine intake pipe device including an upper intake pipe fixed to the.

[Conventional technology]

This type of tilt-type cab-over type vehicle has a cab capable of leaning forward with respect to the chassis 1 above the engine 2 even if the engine 2 is installed at the front end of the chassis 1 as shown in FIG. 3 is attached.

The engine intake pipe device is directly connected to an air cleaner 4 for supplying clean air to the engine 2, and is fixed to the chassis 1, and a lower intake pipe 5 is provided.
The upper intake pipe 6 is detachably fixed to the cab 3.

Therefore, when washing the engine room, the cab 3
The engine 2 is washed by leaning forward to expose the engine room, but in a maintenance shop or the like, the engine 2 is normally started and the vehicle is washed.
This is because it is possible to easily find the occurrence of a leak in the electric system or the like by stopping the engine 2.

Here, when the cab 3 is tilted forward, the lower intake pipe 5 fixed to the chassis 1 and the upper intake pipe 6 fixed to the cab 3 are separated from each other, so that the car wash water is connected to the connection opening portion of the lower intake pipe 5. May inadvertently enter the vehicle, and if the engine 2 is started in this state, a water hammer may occur and the engine 2 may be destroyed.

Therefore, as an example of the conventional engine intake device,
It had a structure as shown in FIG. 6 and FIG. That is, in the figure, reference numeral 5 denotes a lower intake pipe, and an opening / closing lid 7 attached to the upper end portion thereof is composed of a plurality of triangular lid pieces 7a obtained by radially cutting a disc, and the lower intake air is provided via hinges 8 respectively. Each lid piece 7a is attached to the outer periphery of the upper end of the pipe 5.
Is urged by a return spring (not shown) in a direction of closing the upper end of the lower intake pipe 5.

On the other hand, at the lower end of the upper intake pipe 6, the lower intake pipe 5
There is provided a pressing member 10 for pressing the lever portion 9 of each lid piece 7a to open the lid piece 7a in the upward direction at the time of connection with (see Japanese Utility Model Laid-Open No. 56-122621).

Further, FIGS. 7 to 9 show another conventional example, in which the connecting portion between the lower intake pipe 5 and the upper intake pipe 6 has the following structure. That is, an elastic member 7 having a self-closing type through hole 7a that can elastically expand and contract in the radial direction is attached to the upper end portion of the lower intake pipe 5, and the lower intake pipe 5 is attached to the lower end portion of the upper intake pipe 6. A tube member 8 that is inserted into the through hole 7a in the closed state and expands the same when it is connected to is attached (Japanese Utility Model Publication No. 56-122622).

[Problems to be solved by the device]

However, in the first conventional example disclosed in Japanese Utility Model Publication No. 56-122621, the opening / closing lid 7 is composed of a plurality of lid pieces 7a.
Each of the lid pieces 7a is attached to the lower intake pipe 5 via a hinge 8, and each lid piece 7a is biased by a return spring in a direction of closing the upper end of the lower intake pipe 5, so that the structure is complicated and durable. Since the upper part of the lower intake pipe 5 is closed by the attachment of the plurality of lid pieces 7a, car wash water easily enters from each attachment part and the waterproof effect is not reliable. was there.

Further, at the time of car washing, the opening of the lower intake pipe 5 is closed, but it is impossible to start the engine 2 in this state because no separate air intake is provided.

Further, when the opening / closing lid 7 is opened, the plurality of lid pieces 7a are present in the passage of the upper intake pipe 6, so that the plurality of lid pieces 7a are exposed to the outside air taken from the upper end opening of the upper intake pipe 6.
May vibrate, which may cause an unpleasant vibration noise and fatigue deformation of the lid piece 7a.

On the other hand, in the second conventional example disclosed in Japanese Utility Model Laid-Open No. 56-122622, the elastic member 7 attached to the upper end of the lower intake pipe 5 closes the through hole 7a only by its own elastic force. Since it is in a state, the closed state is not reliable, there is a risk that car wash water may enter through the closed through hole 7a, and it is easily deteriorated over time and has low durability. Further, as in the case of the above-mentioned first conventional example, when the opening of the lower intake pipe 5 is closed, no separate air intake is provided, so it is impossible to start the engine 2 in this state. There was a drawback that

[Means for Solving the Problems]

The present invention was made in order to solve the above-mentioned drawbacks of the conventional device, and the open / close lid structure of the connecting opening of the lower intake pipe is simple and highly durable, and it is always reliable. The purpose of the present invention is to provide an intake pipe device that can be opened and closed and can start the engine even when washing the vehicle.The gist of the invention is to provide an opening on the upper end of the lower intake pipe attached to the chassis and an intake port on the side. An opening / closing lid, which is formed respectively, is urged in the tube in a direction to close the opening, and the opening / closing lid of the opening / closing lid is pivotally attached at the time of connection by fitting with an upper intake pipe attached to a cab. An engine intake pipe device for a tilt-type vehicle configured to rotate so as to close the intake port.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a schematic diagram for explaining the arrangement of the engine intake pipe device of a tilt-type cab-over type vehicle to which the present invention is applied, and FIG. 2 shows the connecting portion of the engine intake pipe device from above. FIG. 3 is a perspective view as seen, FIG. 3 is a perspective view as seen from below of the same connecting portion, and FIGS. 4 (a) and 4 (b) are operation explanatory views of the engine intake pipe device.

In the drawing, 7 is a rectangular box fixed to the connecting opening of the lower intake pipe 5, and a circular opening 8 is formed on the upper surface of the box 7. Further, one side surface of the box 7 is formed by a dogleg-shaped bulging portion 9 composed of an upward slope 9a and a downward slope 9b, and the downward slope 9b of the bulging portion 9 has A rectangular intake port 10 is formed.

11 is a single-plate open / close lid arranged in the box 7,
The flat portion 12 having the same shape as the upper surface of the box 7 and this flat portion
The upper surface of the flat portion 12 is fitted to the opening portion 8 of the box 7 and is connected to the upper surface 12 of the upper surface 9a and the lower surface 9b. A possible disk portion 12a is provided. At the rear end of the inclined surface portion 13, the lower edge portion of the upward inclined surface portion 9a, that is, the intake port
A hinge 14 is rotatably attached to the upper edge portion of the box 10, and is biased by a spring (not shown) in a direction to close the opening 8 of the box 7.

On the other hand, to the connecting portion of the upper intake pipe 6, there is connected a push-down pipe 15 that penetrates through the opening 8 formed in the upper surface of the box 7 and rotates the closing lid 11 downward. A cover 16 that completely fits the upper surface of the box 7 is attached to the connecting portion of the pipe 6.

[Operation of Example]

When the cab 3 is in the normal position where the cab 3 can be operated, the push-down pipe 15 of the upper intake pipe 6 enters from the opening 8 formed in the upper surface of the box 7, and supports the hinge 14 as a fulcrum against the elastic force of the spring. The opening / closing lid 11 is rotated downward to press it against the inner surface of the box 7, and the inclined surface portion 13 of the opening / closing lid 11 is
Block the intake port 10 of.

As a result, the lower intake pipe 5 and the upper intake pipe 6 are connected,
The outside air taken in from the upper end opening of the upper intake pipe 6 is supplied to the air cleaner 4 from the push-down pipe 15 through the lower intake pipe 5. In the above state, since the opening / closing lid 11 is housed between the push-down pipe 15 of the upper intake pipe 6 and the side surface of the box 7, it should be exposed to the outside air taken in from the upper end opening of the upper intake pipe 6. There is no abnormal vibration noise, and there is no fatigue deformation of the opening / closing lid 11.

Next, when the cab 3 is tilted with respect to the chassis 1 for repair or inspection of the engine 2, the pressing interval 15 of the upper intake pipe 6 is pulled out from the opening 8 of the box 7, so The opening / closing lid 11 in the inside rotates upward with the hinge 14 as a fulcrum by the restoring force of the spring, and the disc portion 12 of the opening / closing lid 11 is rotated.
The a is fitted into the opening 8 of the box 7 and completely closed, and the intake port 10 of the box 7 is opened.

Therefore, it is possible to reliably prevent the car wash water from entering the lower intake pipe 5, and the air cleaner 4 has a box 7
Since the outside air is supplied from the intake port 10 through the lower intake pipe 5, the engine 2 can be started. The intake port
Since 10 is formed on the downward slope 9b, invasion of car wash water can be prevented.

[Effect of device]

An intake pipe device for an engine of a tilt type vehicle according to the present invention,
As described above, an opening is formed on the upper surface of the upper end portion of the lower intake pipe attached to the chassis, and an intake port is formed on the side surface of the lower intake pipe, and the opening / closing lid biased in the direction to close the opening is pivotally mounted inside the pipe. However, since the opening / closing lid is rotated by the insertion lower end at the time of connection by fitting with the upper intake pipe attached to the cab to close the intake port, the structure is simple and changes over time. The durability is improved and the waterproofness is perfect.

Further, since the opening / closing lid is housed in the lower intake pipe when it is connected to the upper intake pipe, it is not exposed to the outside air taken in from the upper end opening of the upper intake pipe, and abnormal vibration noise is generated or the opening / closing lid is closed. There are various effects such as little fatigue deformation.

[Brief description of drawings]

FIG. 1 is a schematic view for explaining the arrangement state of an engine intake pipe device of a tilt-type cab-over type vehicle to which the present invention is applied, and FIG. 2 is a perspective view of a connecting portion of the engine intake pipe device seen from above. Fig. 3 and Fig. 3 are perspective views of the same connecting portion as seen from below, Figs. 4 (a) and (b) are explanatory views of the operation of the engine intake pipe device, and Fig. 5 is engine intake of a conventional tilt-type cab-over type vehicle. FIG. 6 is a vertical cross-sectional view of a main part showing a pipe device, FIG. 6 is a plan view of an opening / closing lid used in the engine intake pipe device, and FIG.
FIG. 8 is a vertical cross-sectional view of a main part of an engine intake pipe device of another conventional tilt-type cab-over type vehicle, FIG. 8 is a perspective view of an elastic member used in the engine intake pipe device, and FIG. It is the II-II sectional view taken on the line of FIG. 1 ... Chassis, 2 ... Engine, 3 ... Cab, 4 ...
Air cleaner, 5 ... Lower intake pipe, 6 ... Upper intake pipe,
7 ... Box, 8 ... Opening, 10 ... Intake port, 11 ...
Opening / closing lid, 14 ... Hinge, 15 ... Push-down tube.

Claims (1)

[Scope of utility model registration request] 1. A lower intake pipe mounted on a chassis is provided with an opening at an upper surface of an upper end thereof and an intake port at a side surface thereof, and an opening / closing lid biased in a direction for closing the opening is pivotally mounted inside the pipe. An engine intake pipe device for a tilt type vehicle configured to rotate the opening / closing lid by the insertion lower end portion at the time of connection by fitting with an upper intake pipe attached to a cab to close the intake port.