JPH05288056A - Cooling water circulating pipe passage device in engine for cab over type vehicle - Google Patents

Abstract

PURPOSE:To prevent air from being cumulated in the way of the cooling water circulating duct extending from the cooling water outlet in an engine to an upper tank in a radiator, without loss workability of press formation in the floor panel of a cabin, and without bringing increase of noise and an assembly manhour, in a cab over type vehicle. CONSTITUTION:A cooling water circulating duct 7 extending from the cooling water outlet 5a of an engine 5 to the upper tank 6a of a radiator 6, is arranged to penetrate the front plate 2b and the back plate 2c of a floor panel 2, and extend along the upper surface of the floor tunnel 2d. On the other hand, the cooling water circulating duct 7 consists of a metal pipe 7a extending along the floor tunnel 2d, and flexible pipes 7b, 7c with which both ends of the metal pipe 7a and the cooling water outlet 5a of the engine 5 and the upper tank 6a of the radiator 6 are connected to each other, and grommets 9, 10 made of flexible elastic body of rubber and the like are interposed in a part where which the front plate 2b and the back plate 2c of the floor panel 2 are penetrated by the metal pipe 7a.

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.

An object of the present invention is to solve this problem without impairing the assembling property or increasing the noise.

[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,
A metal pipe of a portion extending along the floor tunnel, the cooling water circulating pipe being disposed so as to extend through the front plate and the rear plate of the floor panel and extend along the upper surface of the floor tunnel, and the metal pipe. On the other hand, a flexible pipe connecting each end of the engine and the cooling water outlet of the engine and the upper tank of the radiator, respectively, while the metal pipe penetrates the front plate and the rear plate of the floor,
A grommet made of a soft elastic material such as rubber is inserted between the metal pipe and the front plate and the rear plate.

[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.

Moreover, the cooling water circulation pipe is formed by a metal pipe extending along the floor tunnel, and a flexible pipe connecting both ends of the metal pipe to the cooling water outlet of the engine and the radiator upper tank. According to this structure, when assembling the metal pipe, the metal pipe is inserted into the floor panel so as to penetrate the front plate and the rear plate, and then both ends of the metal pipe, the cooling water outlet of the engine and the upper tank of the radiator are connected. It suffices to connect between them by a flexible pipe, and the dimensional error between the floor panel, the engine and the radiator, and the dimensional error between the engine and the radiator can be absorbed by the both flexible pipes. As a result, the number of steps required for assembly can be significantly reduced, and the support bracket for the cooling water circulation pipeline can be reduced. And it can be omitted bets, it is possible to reduce the simplification and parts of structures.

In addition, when the metal pipe in the cooling water circulation pipe penetrates the front plate and the rear plate of the floor panel, a soft elastic body such as rubber is formed between the metal pipe and the front plate and the rear plate. By inserting the grommet, the cooling water circulation pipe can be elastically supported with respect to the floor panel via the grommet made of both soft elastic bodies, so that not only noise is increased, but also the The structure for supporting the cooling water circulation pipe can be simplified and the number of parts can be reduced.

[0011]

Therefore, according to the present invention, the cooling performance of the engine can be improved without impairing the workability of the press molding in the floor panel which constitutes the cabin of the cab-over type vehicle, and without causing an increase in noise. It is possible to reliably prevent lowering of the cooling water injection to the engine and lower the height of the vehicle, and further, it is possible to reduce the number of assembly steps, the structure, and the number of parts. It has an effect that the cost can be reduced.

[0012]

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 the 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. A flexible pipe 7b connecting the rear end of the pipe 7a and the cooling water outlet 5a of the engine 5, and a flexible pipe 7c connecting the front end of the metal pipe 7a and the upper tank 6a of the radiator 6 , The cooling water circulation line 7
In the portion of the floor panel 2 where the metal pipe 7a penetrates the front plate 2a and the rear plate 2b, between the metal pipe 7a and the front plate 2b and the rear plate 2c, as described in detail below. By inserting the grommets 9 and 10 made of a soft elastic material such as rubber, the metal pipe 7
A is elastically supported on the floor panel 2.

The rear plate 2c of the both grommets 9 and 10
As shown in FIG. 5, one of the grommets 9 has a ring shape mounted in a through hole 2c 'formed in the rear plate 2c, and the metal pipe 7a is slidably inserted therein. However, the other grommet 10 with respect to the front plate 2b is formed in such a manner as to enclose the flange portion 11 fixed to the outer periphery of the metal pipe 7a, as shown in FIGS. Part, front plate 2
The metal pipe 7a is inserted from the front side of the front plate 2b by fastening the bolts 12 to the b, and then the bolts 12 are fastened to attach the metal pipe 7a. The bolts 12 are provided with bushes 13 for preventing the other grommet 10 from being excessively fastened.

As described above, the cooling water circulation pipe line 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 to the upper part of the floor tunnel 2d. When installed so as to extend along the floor panel 2,
Seat 4 at the rear end of engine 5
Even when it is installed in a low area so that
The cooling water circulating pipe 7 is inclined substantially upward from the cooling water outlet 5a of the engine 5 toward the upper tank 6a of the radiator 6 while keeping the height dimension H of the floor tunnel 2d of the floor panel 2 low. It can be straight.

As a result, from the cooling water outlet 5a in the engine 5 to the upper tank 6 in the radiator 6, the workability of press molding in the floor panel 2 which constitutes the cabin 3 in 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. In addition, the upper surface of the floor tunnel 2d of the cooling water circulation pipe 7 is configured to be covered by a cover body 14 detachably attached to the floor tunnel 2d, and the cover body 14 and the floor tunnel 2d are covered. The surface is covered with a floor carpet 15 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 16 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.

5 is an enlarged view of a main part of FIG.

6 is a sectional view taken along line VI-VI of FIG.

7 is a sectional view taken along line VII-VII of FIG.

8 is a sectional view taken along line VIII-VIII of 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 seats 5 engine 5a engine cooling water outlet 6 radiator 6a radiator upper tank 7 cooling water circulation Pipe line 7a Metal pipe 7b, 7c Flexible pipe 9, 10 Grommet

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. The cooling water circulation pipe leading to the upper tank of 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, and the cooling water circulation pipe is connected to the floor tunnel. A portion of the metal pipe extending along with the ends of the metal pipe and the cooling water outlet and the radiator of the engine. A flexible pipe connecting each of the upper tank of the motor and a flexible pipe connecting the upper pipe to the front plate and the rear plate of the floor, and a rubber between the metal pipe and the front plate and the rear plate. A cooling water circulation pipe device in a cab-over type vehicle engine, characterized in that a grommet made of a soft elastic material such as is inserted.