JP7347574B1 - Engine heat shield structure - Google Patents

Abstract

The present invention provides an engine heat shielding structure that makes it difficult for the temperature of a loading platform to rise due to heat from the engine. [Solution] An engine heat shielding structure S includes an engine 1 provided below a cab A of a vehicle in the height direction of the vehicle, and a loading platform 2 provided at the rear of the cab A in the longitudinal direction of the vehicle. The loading platform 2 includes a floor plate 21 forming a floor, and a heat shield plate 22 provided below the floor plate 21 to prevent the floor plate 21 from being heated by heat from the engine 1. Further, a space is provided between the floor plate 21 and the heat shield plate 22 to form an air layer. [Selection diagram] Figure 1

Description

The present invention relates to an engine heat shield structure provided in a vehicle.

Conventionally, cab-over type vehicles having a loading platform are known. Patent Document 1 discloses a cab-over type vehicle having an engine room under the cab.

Utility Model Publication No. 62-156584

When a cab-over type vehicle having a loading platform runs, air heated by an engine disposed under the cab flows below the loading platform behind the cab, causing a problem in that the temperature of the loading platform increases.

Therefore, the present invention has been made in view of this point, and an object of the present invention is to provide an engine heat shielding structure that makes it difficult for the temperature of a loading platform to rise due to heat from the engine.

A first aspect of the present invention includes an engine provided below a cab of a vehicle in a height direction of the vehicle, and a loading platform provided at a rear of the cab in a longitudinal direction of the vehicle; The loading platform provides an engine heat shielding structure including a floor plate forming a floor and a heat shield plate provided below the floor plate to prevent the floor plate from being heated by heat from the engine.

Further, a space forming an air layer may be provided between the floor plate and the heat shield plate.

a first support member provided below the floorboard and extending in the vehicle width direction of the vehicle; and a first support member provided below the floorboard and rearward of the first support member in the longitudinal direction; and a second support member extending in the vehicle width direction, and the heat shield plate includes a first region located below the space and a front end of the first region in the longitudinal direction. a second region extending toward the floorboard; a third region extending forward from the upper end of the second region in the height direction; and a third region extending from the rear end of the first region in the front-rear direction to the It has a fourth region extending toward the floorboard, and a fifth region extending rearward from the upper end of the fourth region in the height direction, and the third region is arranged between the floorboard and the The fifth region is fixed to the floorboard while being sandwiched between the first support member, and the fifth region is fixed to the floorboard while being sandwiched between the floorboard and the second support member. may have been done.

Further, gaps are formed between the second region and the first support member and between the fourth region and the second support member, and the second region is connected to the first support member. The fourth region may not be in contact with the second support member.

The heat shield plate may include a sixth region extending from the left end in the vehicle width direction of the first region toward the floor plate and closing at least a portion of the space; The space may further include a seventh region extending from the right end in the direction toward the floor plate and closing at least a portion of the space.

Further, the sixth region is not in contact with either the second region or the fourth region, and is located between the sixth region and the second region, and between the sixth region and the fourth region. A gap for discharging water to the outside of the heat shield plate is formed between the seventh area and the seventh area, and the seventh area is not in contact with either the second area or the fourth area, and the seventh area is not in contact with either the second area or the fourth area. A gap may be formed between the seventh region and the second region and between the seventh region and the fourth region for discharging water to the outside of the heat shield plate.

According to the present invention, in the engine heat shielding structure, there is an effect that the temperature of the loading platform is difficult to rise due to heat from the engine.

1 shows a state in which the engine heat shield structure according to the present embodiment is installed in a vehicle. The structure near the heat shield plate of the loading platform is shown. 3 is a sectional view taken along the line XX in FIG. 2. FIG. FIG. 3 is a sectional view taken along the YY line in FIG. 2;

[State where the engine heat shield structure S is provided on the vehicle]
FIG. 1 is a diagram showing a state in which an engine heat shielding structure S according to the present embodiment is provided in a vehicle. FIG. 2 is a diagram showing the structure around the heat shield plate 22 of the loading platform 2. As shown in FIG. FIG. 2 is a diagram of the loading platform 2 viewed from the bottom side.

The engine heat shield structure S includes an engine 1, a loading platform 2, a first support member 3, and a second support member 4. The engine 1 is provided below a cab A of a vehicle in the height direction of the vehicle. The vehicle is a cab-over type vehicle. The vehicle is, for example, a flat body truck. Cab A is, for example, a box-shaped cabin portion in which a driver's seat is provided. Engine 1 is, for example, a gasoline engine or a diesel engine.

The loading platform 2 is provided at the rear of the cab A in the longitudinal direction of the vehicle. The loading platform 2 has a floor plate 21 and a heat shield plate 22. The floor plate 21 forms the floor of the loading platform 2. The floorboard 21 is made of wood, for example.

The heat shield plate 22 is provided below the floor plate 21 and prevents the floor plate 21 from being heated by heat from the engine 1. The heat shield plate 22 is made of metal, for example. The thickness of the heat shield plate 22 is, for example, within a range of 0.5 mm to 3.0 mm, and specifically may be about 0.8 mm. Details of the heat shield plate 22 will be described later.

The first support member 3 is a member that is provided below the floor plate 21 and extends in the width direction of the vehicle. The first support member 3 is made of metal, for example. The first support member 3 is provided near the front end of the loading platform 2 in the longitudinal direction of the vehicle.

The second support member 4 is a member that is provided below the floorboard 21 and rearward of the first support member 3 in the longitudinal direction of the vehicle, and extends in the width direction of the vehicle. The second support member 4 is made of wood, for example.

The first support member 3 and the second support member 4 are provided on the upper surface of a plurality of side frames (not shown) extending in the longitudinal direction of the vehicle.

[Structure of heat shield plate 22]
FIG. 3 is a sectional view taken along the line XX in FIG. 2.
The heat shield plate 22 has a first region 221 , a second region 222 , a third region 223 , a fourth region 224 , and a fifth region 225 . The heat shield plate 22 is, for example, a component formed by pressing a single metal plate. The heat shield plate 22 is attached to the lower surface of the floor plate 21 so as to form an air layer between the heat shield plate 22 and the floor plate 21 .

The first region 221 is a region located below a space forming an air layer. The first region 221 extends in the longitudinal direction of the vehicle and in the vehicle width direction of the vehicle. The first region 221 is located between the first support member 3 and the second support member 4 in the longitudinal direction of the vehicle. Although the first region 221 does not necessarily have to be parallel to the floorboard 21, in this embodiment, the first region 221 is parallel to the floorboard 21, as an example. The length between the floor plate 21 and the heat shield plate 22 is, for example, in the range of 3 mm to 30 mm, and specifically may be about 9.2 mm.

The second region 222 is a region extending toward the floorboard 21 from the front end of the first region 221 in the longitudinal direction of the vehicle. The second region 222 extends in the height direction of the vehicle and in the width direction of the vehicle. The second region 222 is located between the first support member 3 and the second support member 4 in the longitudinal direction of the vehicle.

The third region 223 is a region extending forward from the upper end of the second region 222 in the height direction of the vehicle. The third region 223 extends in the longitudinal direction of the vehicle and in the vehicle width direction of the vehicle. The third region 223 is fixed to the floorboard 21 while being sandwiched between the floorboard 21 and the first support member 3 .

The fourth region 224 is a region extending toward the floorboard 21 from the rear end of the first region 221 in the longitudinal direction of the vehicle. The fourth region 224 extends in the height direction of the vehicle and in the width direction of the vehicle. The fourth region 224 is located between the first support member 3 and the second support member 4 in the longitudinal direction of the vehicle.

The fifth region 225 is a region extending rearward from the upper end of the fourth region 224 in the height direction of the vehicle. The fifth region 225 extends in the longitudinal direction of the vehicle and in the vehicle width direction of the vehicle. The fifth region 225 is fixed to the floorboard 21 while being sandwiched between the floorboard 21 and the second support member 4 .

The heat shield plate 22 is constructed by inserting bolts into holes formed in the floor plate 21, holes formed in the third region 223, and holes formed in the first support member 3, and then inserting nuts into the inserted bolts. It is fixed to the floorboard 21 by tightening. Further, the heat shield plate 22 is fixed to the floorboard 21 by inserting nails into the floorboard 21, holes formed in the fifth region 225, and the second support member 4.

In the engine heat shield structure S, the heat shield plate 22 is thus fixed to the floor plate 21 while being sandwiched between the floor plate 21 and the first support member 3 and the second support member 4. With such a configuration, the length of the first region 221 between the first support member 3 and the second support member 4 in the longitudinal direction of the vehicle can be increased. As a result, in the engine heat shielding structure S, it is possible to make it even more difficult for heat from the engine 1 to be transmitted to the floor plate 21. In the configuration of FIG. 3, a part of the heat shield plate 22 is supported at the joint part between the floor plate 21 and the first support member 3, and another part of the heat shield plate 22 is supported at the joint part between the floor plate 21 and the second support member 4. Some are supported. Therefore, no special parts or fixing means are required for fixing the heat shield plate 22 to the floorboard 21.

A gap is formed between the second region 222 and the first support member 3 and between the fourth region 224 and the second support member 4, and the second region 222 is in contact with the first support member 3. Therefore, the fourth region 224 is not in contact with the second support member 4. In the engine heat shield structure S, by having the heat shield plate 22 having such a second region 222 and a fourth region 224, heat is transferred from the heat shield plate 22 to the first support member 3 and the second support member 4. It can be difficult to convey.

Specifically, such a configuration allows heat to be transferred to the first support member 3 and the second support member 4, compared to a configuration in which the second region 222 and the fourth region 224 contact the first support member 3 and the second support member 4, respectively. It is difficult to be transmitted to the second support member 4. As a result, in the engine heat shield structure S, heat from the engine 1 is difficult to be transmitted to the floor plate 21 via the heat shield plate 22, the first support member 3, and the second support member 4, and an increase in the temperature of the floor plate 21 is suppressed. It can be suppressed.

FIG. 4 is a sectional view taken along the YY line in FIG. 2. Note that in FIG. 4, the second support member 4 is omitted. Although the left and right sides of the heat shield plate 22 may be open, in this embodiment, a configuration in which the left and right sides of the heat shield plate 22 are closed is illustrated.

The heat shield plate 22 has a sixth region 226 and a seventh region 227. The sixth region 226 is a region that extends from the left end of the first region 221 in the vehicle width direction of the vehicle toward the floorboard 21 and closes at least a portion of the side surface of the space forming the air layer. The sixth region 226 is located on the left side of the space forming the air layer. The sixth region 226 extends in the longitudinal direction of the vehicle and in the height direction of the vehicle. The sixth region 226 is located between the first support member 3 and the second support member 4 in the longitudinal direction of the vehicle.

The seventh region 227 is a region that extends from the right end of the first region 221 in the vehicle width direction of the vehicle toward the floor plate 21 and closes at least a portion of the side surface of the space forming the air layer. The seventh region 227 is located on the right side of the space forming the air layer. The seventh region 227 extends in the longitudinal direction of the vehicle and in the height direction of the vehicle. The seventh region 227 is located between the first support member 3 and the second support member 4 in the longitudinal direction of the vehicle.

In the engine heat shield structure S, by having the heat shield plate 22 having the sixth region 226 and the seventh region 227 in this way, the air heated by the engine 1 and flowing from the front to the rear of the vehicle can be transferred to the floor plate. 21 and the heat shield plate 22 from flowing from outside in the vehicle width direction. As a result, in the engine heat shielding structure S, it becomes more difficult for the temperature of the loading platform 2 to rise due to the heat from the engine 1.

The sixth region 226 is not in contact with either the second region 222 or the fourth region 224, and is located between the sixth region 226 and the second region 222 and between the sixth region 226 and the fourth region 224. A gap may be formed between them for draining water to the outside of the heat shield plate 22.

The seventh region 227 is not in contact with either the second region 222 or the fourth region 224, and is located between the seventh region 227 and the second region 222 and between the seventh region 227 and the fourth region 224. A gap may be formed between them for draining water to the outside of the heat shield plate 22.

The right and left sides of the heat shield plate 22 may be completely closed by the sixth region 226 and the seventh region 227, and a sealed space may be formed between the heat shield plate 22 and the floor plate 21. However, in one form, it is preferable that the sixth region 226 and the seventh region 227 are provided in a shape that does not completely close the space and forms a gap for draining water. According to such a configuration, for example, water accumulated between the heat shield plate 22 and the floorboard 21 can be discharged to the outside of the heat shield plate 22.

As described above, in the configuration of this embodiment, the heat shield plate 22 is attached to the lower surface of the floor plate 21, and a space forming an air layer is provided between the floor plate 21 and the heat shield plate 22. . The provision of the heat shield plate 22 prevents the temperature of the floorboard 21 from rising. Further, the air layer has a higher heat insulating performance than, for example, a solid such as metal. Therefore, in the engine heat shield structure S, by providing a space that forms an air layer between the floor plate 21 and the heat shield plate 22 in this way, it is difficult for the heat from the engine 1 to be transmitted to the floor plate 21. be able to.

[Effects of engine heat shield structure S according to this embodiment]
The engine heat shield structure S according to the present embodiment includes a loading platform 2 having a heat shield plate 22 that is provided below a floor plate 21 and prevents the floor plate 21 from being heated by heat from the engine 1.

As a result, in the engine heat shielding structure S, it becomes difficult for air heated by the engine 1 to come into contact with the floor plate 21 of the loading platform 2. Therefore, in the engine heat shielding structure S, it becomes difficult for the temperature of the loading platform 2 to rise due to heat from the engine 1.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes can be made within the scope of the gist. be. For example, all or part of the device can be functionally or physically distributed and integrated into arbitrary units. In addition, new embodiments created by arbitrary combinations of multiple embodiments are also included in the embodiments of the present invention. The effects of the new embodiment resulting from the combination have the effects of the original embodiment.

A... Cab S... Engine heat shield structure 1... Engine 2... Loading platform 21... Floor plate 22... Heat shield plate 221... First area 222... Second area 223 ...Third area 224...Fourth area 225...Fifth area 226...Sixth area 227...Seventh area 3...First support member 4...Second support member

Claims (5)

an engine provided below a cab of a vehicle in a height direction of the vehicle;
a loading platform provided at the rear of the cab in the longitudinal direction of the vehicle;
has
The loading platform is
Floorboards forming the floor;
a heat shield plate provided below the floorboard to prevent the floorboard from being heated by heat from the engine;
has
A space forming an air layer is provided between the floor plate and the heat shield plate,
a first support member provided below the floorboard and extending in the vehicle width direction of the vehicle;
A second support member that is provided below the floorboard and rearward in the front-rear direction than the first support member and extends in the vehicle width direction;
It further has
The heat shield plate is
a first region located below the space;
a second region extending from the front end of the first region in the front-rear direction toward the floorboard;
a third region extending forward from an upper end of the second region in the height direction;
a fourth region extending from the rear end of the first region in the front-rear direction toward the floorboard;
a fifth region extending rearward from an upper end of the fourth region in the height direction;
has
The third region is fixed to the floorboard while being sandwiched between the floorboard and the first support member, or
The fifth region is an engine heat shield structure fixed to the floorboard while being sandwiched between the floorboard and the second support member. The third region is fixed to the floorboard while being sandwiched between the floorboard and the first support member,
The fifth region is fixed to the floorboard while being sandwiched between the floorboard and the second support member.
The engine heat shield structure according to claim 1. A gap is formed between the second region and the first support member and between the fourth region and the second support member, and the second region is in contact with the first support member. and the fourth region is not in contact with the second support member.
The engine heat shield structure according to claim 2 . The heat shield plate is
a sixth region extending from the left end of the first region in the vehicle width direction toward the floor plate and closing at least a portion of the space;
a seventh region extending from the right end of the first region in the vehicle width direction toward the floor plate and closing at least a portion of the space;
further having,
The engine heat shield structure according to claim 2 or 3 . The sixth region is not in contact with either the second region or the fourth region, and is located between the sixth region and the second region and between the sixth region and the fourth region. A gap is formed between the heat shield plate for draining water to the outside of the heat shield plate,
The seventh region is not in contact with either the second region or the fourth region, and is located between the seventh region and the second region and between the seventh region and the fourth region. A gap is formed between the heat shield plate and the heat shield plate for draining water to the outside of the heat shield plate.
The engine heat shield structure according to claim 4 .

Images