JPH05288055A - Cooling water circulating duct device in engine for cab over type vehicle - Google Patents

Abstract

PURPOSE:To prevent air from being cumulated in the way of a cooling water circulating duct extending from the cooling water outlet in an engine to an upper tank in a radiator, without losing workability of press formation in the floor panel of a cabin, in a cab over type vehicle. CONSTITUTION:A cooling water circulating duct 7 extending from the cooling water outlet 5a of an engine 5 arranged behind a floor panel 2 to the upper tank 6a of a radiator 6 arranged in front of the floor panel 2, is arranged so as to penetrate the front plate 2b and the back plate 2c of the floor panel 2 and extend along the upper surface of the floor tunnel 2d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a vehicle body frame with a floor panel for forming a cabin for a driver, a water-cooled engine at the rear part of the floor panel, and a radiator for the engine at the front part. The present invention relates to a so-called cab-over type vehicle, which relates to a conduit device for circulating cooling water for the engine between the engine and the radiator.

[0002]

2. Description of the Related Art Conventionally, a radiator is arranged at a front portion of a floor panel forming a cabin for a driver, while an engine is arranged at a rear portion of the floor panel and a lower portion of a seat. In a so-called cab-over type vehicle, for example, as described in Japanese Utility Model Publication No. 3-16749, an arch-shaped floor tunnel formed by recessing the bottom plate upward is formed in the bottom plate of the floor panel. By being formed so as to extend in the direction, the traveling wind hitting the radiator is configured to blow through in the direction of the engine through the floor tunnel, while the cooling water circulation pipe from the cooling water outlet of the engine to the upper tank to the radiator. The road is arranged in the floor tunnel.

[0003]

By the way, the floor panel constituting the cabin in the cab-over type vehicle is manufactured by press-molding a single piece of metal. Therefore, the floor panel of the floor panel is not manufactured. The height of the tunnel cannot be increased so much because there is a limit value due to the relationship of deep drawing during press forming.

On the other hand, the cooling water outlet of the engine is provided at the highest portion of the engine. Therefore, in order to make the height of the vehicle as low as possible, in the case where the seat at the rear end of the floor panel is arranged at a lower portion so as to come close to the engine in the lower part, from the cooling water outlet in the engine, In order to arrange the cooling water circulation pipe to the radiator so as to pass through the inside of the floor tunnel in the floor panel, the cooling water circulation pipe should be installed in the middle of the cooling water circulation pipe in an obliquely upward direction connecting the cooling water outlet of the engine and the upper tank of the radiator. It must be lower than the straight line.

Therefore, air is collected in the middle of the cooling water circulation pipe at a portion which is once lower than the obliquely upward straight line connecting the cooling water outlet of the engine and the upper tank of the radiator. However, there is a problem that not only the effective circulation is hindered, but also the injection of the cooling water from the radiator to the engine is hindered.

The present invention has a technical problem to solve this problem.

[0007]

In order to achieve this technical object, the present invention provides a vehicle body frame with a floor panel forming a cabin for a driver, and a water-cooled engine at the front of the floor panel. A radiator for the engine is provided in each section, and an arch-shaped floor tunnel formed by denting the bottom plate upward is formed in the bottom plate between the front plate and the rear plate of the floor panel so as to extend in the front-rear direction. In a cab-over type vehicle configured as described above, a cooling water circulation pipe line from the cooling water outlet in the engine to the upper tank in the radiator,
The front panel and the rear panel of the floor panel are penetrated so as to extend along the upper surface of the floor tunnel.

[0008]

[Operation] If the cooling water circulation pipe from the cooling water outlet of the engine to the upper tank of the radiator is arranged so as to extend along the upper surface of the floor tunnel through the front and rear plates of the floor panel, When the seat at the rear end of the floor panel is installed at a lower portion so as to approach the engine at the lower part of the floor panel, the cooling water circulation pipe is kept in a state in which the height dimension of the floor tunnel in the floor panel is lowered. It is possible to form a substantially straight line that inclines obliquely upward from the cooling water outlet of the engine toward the upper tank of the radiator.

[0009]

Therefore, according to the present invention, the cooling performance of the engine is reduced and the cooling water is injected into the engine without impairing the workability of the press molding in the floor panel constituting the cabin of the cab-over type vehicle. It is possible to reliably prevent the decrease and to reduce the height of the vehicle.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. In the drawings, reference numeral 1 indicates a vehicle body frame provided with a pair of left and right side frames 1a and 1b extending in the front-rear direction of the vehicle. On the front upper surface of the vehicle body frame 1, a metal plate is seen from the side, a bottom plate 2a and a front plate. 2b and rear plate 2c
Is attached to the floor panel 2 having a substantially upward U-shape.

A cabin 3 is provided on an upper surface of the floor panel 2, and a seat 4 is provided inside the cabin 3 and at a rear portion of the floor panel 2. Further, on the upper surface of the vehicle body frame 1, an engine 5 is provided at a rear portion of the floor panel 2 and a lower portion of the seat 4, and an air cooling type for the engine 5 is provided at a front portion of the floor panel 2. Each of the radiators 6 is mounted, and further, the bottom plate 2a of the floor panel 2 is formed with an arch-shaped floor tunnel 2d formed by recessing the bottom plate 2a upward so as to extend in the front-rear direction.

Reference numeral 7 indicates the cooling water outlet 5a of the engine 5 to the upper tank 6 of the radiator 6.
Reference numeral 8 denotes the radiator 6
3 shows respective cooling water return circulation lines from the lower tank 6b to the cooling water inlet 5b in the engine 5. Then, the cooling water circulation pipe 7 is arranged on the upper surface side of the floor tunnel 2d of the floor panel 2 so as to penetrate the front plate 2b and the rear plate 2c of the floor panel 2, and the metal pipe 7a. The flexible pipe 7b connects the rear end of the pipe 7a and the cooling water outlet 5a of the engine 5, and the flexible pipe 7c connects the front end of the metal pipe 7a and the upper tank 6a of the radiator 6.

It should be noted that, in the portion of the cooling water circulation pipe 7 where the metal pipe 7a penetrates the front plate 2a and the rear plate 2b of the floor panel 2, grommets 9 and 10 made of a soft elastic material such as rubber are inserted. Has been done. In this way, the cooling water circulation pipeline 7 extending from the cooling water outlet 5a of the engine 5 to the upper tank 6a of the radiator 6 penetrates the front plate 2b and the rear plate 2c of the floor panel 2 and extends along the upper part of the floor tunnel 2d. With this arrangement, even when the seat 4 at the rear end of the floor panel 2 is installed at a lower portion so as to come close to the engine 5 at the lower portion thereof, the cooling water circulation pipe 7 is connected to the floor tunnel 2d of the floor panel 2 by the cooling water circulation pipe 7. With the height dimension H kept low, it is possible to form a substantially straight line that inclines obliquely upward from the cooling water outlet 5a in the engine 5 toward the upper tank 6a in the radiator 6.

As a result, from the cooling water outlet 5a of the engine 5 to the upper tank 6 of the radiator 6, the workability of press molding of the floor panel 2 which constitutes the cabin 3 of the cab-over type vehicle is not impaired.
It is possible to reliably prevent air from accumulating in the middle of the cooling water circulation pipeline 7 leading to a. The upper surface of the floor tunnel 2d of the cooling water circulation pipe 7 is configured to be covered with a cover body 11 detachably attached to the floor tunnel 2d, and the cover body 11 and the floor tunnel 2d are covered. The surface is covered with a floor carpet 12 laid on the bottom plate 2a of the floor panel 2. In addition, on the upper surface of the floor tunnel 2d,
A drain hole 13 is provided.

[Brief description of drawings]

FIG. 1 is a side view of a cab-over type vehicle.

FIG. 2 is a plan view showing a main part of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

[Explanation of symbols]

1 body frame 2 floor panel 2a bottom plate for floor panel 2b front plate for floor panel 2c rear plate for floor panel 2d floor tunnel for floor panel 3 cabin 4 seat 5 engine 5a engine cooling water outlet 6 radiator 6a radiator upper tank 7 cooling water circulation Pipeline

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatoshi Tashiro 2-1-1 Taoyuan, Ikeda City, Osaka Daihatsu Industry Co., Ltd.

Claims (1)

[Claims] 1. A vehicle body frame is provided with a floor panel for forming a cabin for a driver, a water-cooled engine is provided at a rear portion of the floor panel, and a radiator for the engine is provided at a front portion, while the floor panel is provided. In a cab-over type vehicle, in which a bottom plate between the front plate and the rear plate in is formed with an arch-shaped floor tunnel formed by denting the bottom plate upward in the front-rear direction, from the cooling water outlet of the engine. In the engine for a cab-over vehicle, the cooling water circulation pipe line leading to the upper tank in the radiator is arranged so as to extend along the upper surface of the floor tunnel through the front plate and the rear plate of the floor panel. Cooling water circulation line device.