JPS6329607Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air bleed pipe structure for a rear engine truck vehicle.

In the above-mentioned rear-engine truck vehicles, the radiator is located at the front of the vehicle body for its cooling effect, and is connected to the engine through two cooling hoses piped at the bottom of the vehicle body. Water is supplied from a reserve tank located higher than the radiator, which is connected to the cooling pipe via a connector hose.

When injecting water into this engine cooling system,
At the time of injection, it is necessary to bleed air from the cooling system within the engine, and for this purpose, the air bleed pipe is pulled out from the engine and opened above the water level of the reserve tank.

Conventionally, in a rear-engine truck vehicle, the air bleed pipe is first drawn out from the engine cooling system and then piped under the cross member of the floor, as shown by the dashed line 4' in FIG. He was being led to a reserve tank.

In this piping, if there is a downward direction in the pipe in the direction of air movement, air may accumulate in the middle of the pipe, and the height difference between the position where the pipe is pulled out immediately after the engine and the parallel position of the pipe piping is H. It has been known that when the air pressure is small, the air bleed efficiency is poor.

This invention applies to rear engine truck vehicles.
It is an object of the present invention to provide an air bleed pipe structure that allows air to be vented from an engine cooling system more smoothly than before, has a simple support structure for the air bleed pipe, and can be installed at low cost.

In order to achieve this objective, the present invention places an air bleed pipe from the engine along the inside of the floor bead along the front and rear direction of the loading platform, and the air bleed pipe is fitted into a cross member for reinforcing the loading platform. The pipe is inserted and supported into the center hole of a spacer press-fixed inside the floor bead, and then the pipe is led to a reserve tank above the floor bead position, and is opened in the upper side wall of the reserve tank.

In addition, prior art related to the piping configuration of the air bleed pipe is found in Japanese Utility Model Application Publication No. 49-102131.

An embodiment of the present invention will be described in detail below based on the drawings.

FIG. 1 is an overall side view of a rear engine truck vehicle. Cooling is provided by a radiator 1 located at the front of the vehicle body, and the cooling is circulated through two cooling pipes 31 to the cooling system of the engine 2. Cooling water is injected from a reserve tank 6 whose water level is higher than that of the radiator 1, and is supplied to the cooling system through a connector pipe 32 communicating with one midway of a cooling pipe 31. In this case, the radiator air bleed pipe 5 and the engine air bleed pipe 4 are open to the upper wall surface 61 of the reserve tank 6.

If the reserve tank 6 is arranged in a space surrounded by a bag panel 91 of the driver's seat and a door 94 as shown in FIG. 2, it is advantageous in terms of space and inside the piping.

Here, the air vent pipe 4 is arranged linearly parallel to the floor, since if the air vent pipe 4 is arranged in an uneven manner, water may accumulate in the recessed part. Furthermore, the greater the height difference between the pipe pull-out portion 21 immediately after the engine and the parallel position of the pipe piping, the better the air removal efficiency is, but conventionally, the height difference was only H because the piping was placed below the cross member 82. In the embodiment of the present application, as shown in FIGS. 3 to 5, since the piping is installed inside the floor bead 81, the height difference is h, which is larger than the conventional one.

Floor bead 81 extending to back panel 91
A cross member 82 is present in the middle, and the spacer 7 is fixed by the pressing force of this cross member 82 and the floor bead 81.

The spacer 7 has a trapezoidal shape made of elastic synthetic resin or the like, and has a groove 71 on the lower side that fits into the cross member 82 and a central hole 72 into which the pipe 4 is inserted and supported. By providing the split groove 73 into which the pipe 4 is inserted, the pipe 4 can be easily inserted into the center hole 72 due to the elasticity of the spacer itself.

As explained above, according to the present invention, the air bleeding effect when injecting cooling water into the engine cooling system of a rear engine truck is improved, the piping is simple, and it is covered with a floor bead and is safe. effective.

Furthermore, when welding the cross member to the floor, it is sufficient to simply fit the spacer to the cross member, and the pipe can be easily inserted into the spacer itself, which is also inexpensive.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing the whole of one embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig.
The figure is a perspective view of the spacer, and FIGS. 4 and 5 are detailed views of piping using the spacer. 2... Engine, 4... Air bleeding pipe, 7... Spacer, 72... Center hole, 6... Reserve tank, 61
...Upper wall surface, 81...Floor bead, 82...Cross member.

Claims (1)

[Scope of utility model registration request] In the engine cooling system of a rear-engine truck, the air bleed pipe from the engine is placed along the inside of the floor bead formed along the longitudinal direction of the cargo bed, and the air bleed pipe is fitted into a cross member for reinforcing the cargo bed. An air bleed pipe for an engine, which is inserted and supported into a central hole of a spacer press-fixed inside a floor bead, then led to a reserve tank above the floor bead position, and opened in an upper side wall of the reserve tank. structure.