JPS5843451Y2 - Radiator water supply and drainage system for tailed cab over vehicles - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a water supply and drainage system for a Kerradiator in a tilt-type cabover vehicle.

In tilt-type cab-over type automobiles, in order to maximize the interior volume of the cab and improve its comfort, it is necessary to reduce the vertical height of the engine, radiator, etc.

therefore. In this type of vehicle, the radiator's upper and lower tanks are made smaller, and the reduction in cooling water capacity due to the smaller size of both tanks is compensated for by a header tank installed elsewhere.

However, in Tittle type cab over vehicles, the cab is attached to the chassis frame so that it can be tilted forward.
Conventionally, the header tank was fixed to a rear arch that detachably fixed the rear end of the cab.

Therefore, the header tank is installed in a small gap between the rear surface of the cab and the loading platform, which deteriorates the water supply efficiency and requires an unnecessarily large gap between the cab and loading platform. However, if priority was given to the comfort of the cab, the front-to-back length of the loading platform would be shortened, and if priority was given to the loading area, the front-to-back length of the cab would be shortened, resulting in poor comfort.

This idea eliminates all of the above-mentioned drawbacks of the conventional technology, improves water supply efficiency by installing the header tank in the front of the cab, and reduces the gap between the cab and the loading platform to provide sufficient space for the cab and loading platform. It is an object of the present invention to provide a radiator water supply and drainage device that can be made larger in size.

Hereinafter, this invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

1 is a chassis frame of a truck, 2 is a front wheel, and 3 is a cab. The cab 3 is mounted so as to be tiltable forward about a tilt center 4 set at the front end of the chassis frame 1.

5 is an engine mounted below the cab 3, 6 is a radiator, and the engine 5 and radiator 6 are connected by a radiator hose 7.8.

6a is an upper tank of the radiator 6, and 6b is a lower tank.

A header tank 9 is mounted on the inner surface of the front wall of the cab 3 at a higher position than the upper tank a, and its water supply port 9a faces the inner surface of an opening/closing lid (not shown) mounted on the front surface of the cab 3.

A water supply hose 10 made of rubber or the like connects the bottom of the header tank 9 and the lower tank 6b of the radiator 6 by bypassing the lower part of the tilt center 4.

Reference numeral 11 denotes an air bleed tube made of rubber or the like, which bypasses the lower part of the tilt center 4 and connects to the thermostat section 5 located above the header tank 9 and above the engine 5.
In addition, a three-way joint 12 is attached to the middle part of the tube 11 to connect the tube 11 and the upper connector a of the radiator 6.

In this way, the upper part of the header tank 9 and the upper tank 6
Air vent tube 1 connecting a and thermostat section 5a
A drain conc 13 is attached to the lower end of 1, and
Inside the three-way joint 12, there is an upper tank 6a.
A check valve 14 is installed to allow air to flow only from the air vent tube 11 to the air vent tube 11.

15,15. ... is a stop band.

It goes without saying that a drain concavity (not shown) is attached to the bottom of the engine 5 and the lower tank 6b, as in the conventional case.

In the radiator water supply and drainage system configured as described above, the cab 3 is installed as the first
When tilting forward as shown by the two-dot chain line in the figure, the header tank 9 attached to the front of the cab 3 also rotates forward about the tilt center 4, and from the header tank 9 to the radiator 6, etc. Since the water supply hose 10 and the air bleed tube 11 detour below the tilt center 4, these hoses 10 and tubes 11 are not forcibly pulled.

Further, the cooling water supplied to the header tank 9 flows into the lower tank 6b of the radiator 6 through the water supply hose 10, and flows into the engine 5 from the tank 6a through the radiator hose 8.

At this time, since the air bleed tube 11 that reaches the top of the header tank 9 is connected to the upper part of the engine 5 and the upper tank 6a of the radiator 6, the air is bleed from the engine 5 and the radiator 6 as the cooling water flows in. As a result, the air vent tube 11 can be filled with cooling water without leaving any air in the engine 5 or the radiator 6.

At this time, the radiator hose 7 connecting the thermostat section 5a of the engine 5 and the upper cylinder a of the 6° radiator is bypassed by the air bleed tube 11, and even when the thermostat is inactive, the cooling water in the engine 5 is transferred to the radiator 6. In order to reduce the warm-up characteristics by causing the air to flow into the upper tank 6a, a check valve 14 is installed inside the three-way joint 12 that connects the air vent tube 11 and the upper tank a. engine 5
Cooling water does not flow into the radiator 6 through the air vent tube 11, and warm-up characteristics are not deteriorated.

In order to prevent the cooling water from freezing in the winter or to replace the cooling water, the drain concavities attached to the lower part of the engine 5 and the lower tank 6b are opened as before, and the inside of the engine 5, radiator 6, and header tank 9 are opened. Drain the cooling water.

Then, since the air bleed tube 11 is curved in a substantially U-shape and detours below the tilt center 4, cooling water remains in the air bleed tube 11 even if the drain cock is opened.

If cooling water remains in the air bleed tube 11 in this way, there is a risk of freezing and damage to the tube 11 due to this freezing, and it may become virtually impossible to bleed air during water supply. In this design, the air vent tube 11
Since a drain cock 13 is also attached to the lower end, opening the drain cock 13 releases the air vent tube 11.
The cooling water remaining inside can be completely discharged, and the above-mentioned freezing accident and failure to bleed air during water supply will not occur.

On the other hand, the header tank 9 is attached to the upper part of the front inner surface of the cab 3, but since this area is a dead space for the comfort of the cab 3, the installation of the header tank 9 reduces the space inside the cab 3. Even if the space is reduced, the comfort of the cab 3 is not impaired.

Since water can be supplied to the header tank 9 mounted at the front of the cab from the front of the cab 3 where there are no obstacles, the water supply operation can be facilitated.

As is clear from the above explanation, the radiator water supply and drainage device according to this invention can supply water to the radiator from the front of the cab, etc., where there are no obstacles, through the header tank, making the water supply work extremely easy. In addition, since there is no need to install a header tank between the cab and the cargo bed, the gap between the cab and the cargo bed can be reduced, and the front-to-back length of the cab can be increased to improve comfort. By increasing the front and back length of the loading platform, the loading platform area can be increased.

In addition, a drain cock is installed at the bottom end of the air bleed tube, which cannot be drained from the radiator by bypassing the bottom of the cab's tilt center, making it easy to drain the cooling water inside the tube. This not only prevents freezing accidents due to remaining cooling water, but also prevents air bleeding during water supply, allowing smooth and reliable water supply and drainage work.

Furthermore, a check valve is installed at the contact point between the air bleed tube and the radiator's upper tank, which prevents cooling water from flowing from the engine through the air bleed tube into the radiator even during warm-up, which improves warm-up characteristics. It can also prevent the deterioration of

[Brief explanation of the drawing]

Fig. 1 is a side view of the main parts showing an embodiment of the radiator water supply and drainage system in a Tittle type cab-over vehicle according to this invention, and Fig. 2 is a partially cutaway side view showing an example of installing a check valve. be. 1... Chassis frame, 3... Cab, 4... Tilt center, 5... Engine, 6... Radiator, 6a...・・・・・・
Upper tank, 6b...Lower tank, 9...
... Header tank, 10 ... Water supply hose, 1
1... Air bleed tube, 13... Drain cock, 14... Check valve.

Claims (1)

[Scope of utility model registration request] In a tilt-type cab-over vehicle in which the cab is attached to the front end of the chassis frame so that it can be tilted forward and the engine is mounted below the cab, the bottom of the header tank attached to the upper front of the cab and the lower tank of the radiator are connected. Connect the water supply hose that bypasses the lower part of the tilt center of the cab, and connect the upper part of the header tank and the radiator tank to the upper part of the engine with an air bleed tube that bypasses the lower part of the tilt center and has a drain cock attached to the lower end. 1. A radiator water supply and drainage system for a tilt type cab-over vehicle, characterized in that a check valve is installed at the connection between the tube and the upper tank to allow only air to flow from the upper tank to the air bleed tube.