JP7367390B2 - Vehicle front structure - Google Patents

Description

The present invention relates to a vehicle front structure in which a body is mounted on a frame.

Conventionally, a vehicle front structure in which a body is attached to a frame is known (for example, see Patent Document 1). In the vehicle front structure disclosed in Patent Document 1, a mount is attached to a frame, and a body is attached via the mount. The frame has a pair of side members extending in the longitudinal direction of the vehicle, and an internal combustion engine is attached to the side members. Although not disclosed in the vehicle front structure of Patent Document 1, in such a vehicle front structure, a heat exchanger that cools the coolant of the internal combustion engine is usually arranged on the front side of the vehicle of the internal combustion engine. Ru. Furthermore, in a vehicle equipped with an air conditioner, a heat exchanger that cools the refrigerant flowing to the air conditioner is further arranged in front of the heat exchanger that cools the coolant of the internal combustion engine.

Japanese Patent Application Publication No. 2016-150600

In the vehicle front structure disclosed in Patent Document 1, a gap is created between the frame and the body. Therefore, when the vehicle is stopped and not exposed to wind, heat generated by the internal combustion engine flows toward the front of the vehicle through this gap. As a result, hot air generated by the internal combustion engine flows in front of the heat exchanger located in front of the internal combustion engine. This causes the heat exchanger to suck in hot air, reducing the heat exchange efficiency of the heat exchanger. When the heat exchange efficiency of the heat exchanger decreases, there is a problem that the cooling efficiency of the air conditioner and the cooling efficiency of the internal combustion engine decrease.

An object of the present invention is to provide a front structure for a vehicle that can suppress a decrease in heat exchange efficiency of a heat exchanger even in a vehicle in which a body is mounted on a frame.

A vehicle front structure according to the present invention is a vehicle front structure in which a body is attached to a frame. The front structure of the vehicle includes a heat exchanger and a foamed resin member. The heat exchanger is mounted with the body and frame attached. The foamed resin member is arranged between the body and the frame and between the heat exchanger and the frame . The foamed resin member has a first portion, a second portion, and a third portion. The first part fills the gap between the body and the frame. The second portion extends from the first portion along the inside of the frame with the body attached to the frame. The second part is disposed between the frame and the heat exchanger with the heat exchanger mounted thereon. The third part connects the first part and the second part diagonally and is crushed by the frame while the body is attached to the frame.

According to this vehicle front structure, when the body is lowered and attached to the frame, the third portion that diagonally connects the first portion and the second portion extending from the first portion is crushed by the frame. When the third portion is crushed, since the third portion diagonally connects the first portion and the second portion, the amount of crushing increases toward the second portion. Therefore, the second portion is pulled toward the frame by the crushed third portion, and the second portion can be aligned along the frame. This makes it difficult for the second portion to get caught on the frame even if the heat exchanger is attached while being slid from above the vehicle with the body attached to the frame. As a result, the second portion can reliably fill the gap between the heat exchanger and the frame. That is, the gaps created between the body and the frame and between the body and the heat exchanger can be filled with the foamed resin member. Therefore, hot air generated by the internal combustion engine is difficult to flow forward of the heat exchanger. As a result, even in a vehicle in which the body is mounted on the frame, it is possible to provide a front structure for a vehicle that can suppress a decrease in heat exchange efficiency of a heat exchanger.

The first portion extends in the vehicle width direction, and the second portion extends downward from the first portion. The first portion may have a first surface located on the body side , extending in the vehicle width direction, and contacting the lower surface of the body, and a second surface located on the frame side, extending in the vehicle width direction . The second portion may have a third surface located on the frame side and extending in the vehicle vertical direction . The third portion includes a fourth surface provided at the boundary between the first and third portions and overlapping the second surface, and a fourth surface provided at the boundary between the second and third portions and overlapping with the third surface. It may have an overlapping fifth surface and a sixth surface located on the frame side, extending obliquely from the end of the fourth surface in the vehicle width direction and connected to the vehicle lower end of the fifth surface. The sixth surface may connect the second surface and the third surface.

According to this configuration, the third portion is configured in a triangular shape by the fourth surface, the fifth surface, and the sixth surface. As a result, when the third portion collapses, the amount of collapse on the second portion side increases, so that the second portion is pulled toward the frame side. This allows the second portion to be biased toward the frame, making it difficult for the second portion to collapse when the heat exchanger is mounted.

The fourth surface may overlap half or more of the second surface in the left-right direction. When the fourth surface is projected onto the first surface of the first portion, the projection surface obtained by projecting the fourth surface onto the first surface may overlap more than half of the first surface in the vehicle width direction.

According to this configuration, the fourth surface of the third portion overlaps more than half of the first surface and the second surface in the vehicle width direction, so that the force transmitted to the third portion increases. Therefore, the third portion is likely to be crushed when the body is attached to the frame. As a result, the second portion is pulled by the third portion, and the second portion is easily rotated toward the frame. As a result, the second portion can easily follow the frame.

The fifth surface may overlap more than half of the third surface.

According to this configuration, since the fifth surface of the third portion located on the second portion side overlaps the third surface by more than half, the second portion easily rotates toward the frame side by crushing the third portion. . This makes it easier for the second portion to follow the frame.

When the third portion is not crushed, the third surface of the second portion extends diagonally below the fifth surface of the third portion, and when the third portion is not crushed, the frame side of the third portion The sixth surface located at may be located so as to overlap an extension surface obtained by extending the third surface in an oblique direction.

According to this configuration, the third surface is connected to the sixth surface without a crease, and the tip of the second portion is arranged closer to the center of the vehicle than the surface of the frame on the inside of the vehicle. Thereby, when the body is attached to the frame, it is possible to prevent the second portion from bending and getting caught on the upper surface of the frame. Furthermore, even if the position of the second portion shifts in the vehicle width direction due to the individual difference between the body and the frame, it is possible to prevent the second portion from getting caught on the upper surface of the frame.

The length from the first surface to the second surface of the first portion may be longer than the distance from the body to the frame in the vehicle vertical direction when the body is attached to the frame.

According to this configuration, since the first portion is also crushed in addition to the third portion, the third portion is reliably crushed and the gap between the body and the frame can be reliably filled. Further, since the second portion extends obliquely, the second portion does not become jammed between the frame and the heat exchanger when the heat exchanger is mounted. Further, the second portion is pulled toward the frame by the crushed third portion, and rotates toward the frame. Therefore, even if the heat exchanger presses the second portion toward the frame during mounting, the pressing force is reduced, making it easier to mount the heat exchanger.

The thickness of the foamed resin member may be greater than the difference between the length of the first portion in the vertical direction and the length of the gap.

According to this configuration, the thickness of the foamed resin member becomes larger than the difference between the vertical length of the first portion and the length of the gap, that is, the collapse margin of the first portion. Therefore, when the second portion is pulled by the third portion and rotates toward the frame, the second portion is less likely to fall down in the front-rear direction.

The vehicle inner side of the body may be located further inside the vehicle than the vehicle inner side of the frame.

According to this configuration, the second portion is also pushed by the body via the first portion, and when the third portion is crushed, the second portion is more likely to rotate.

According to the present invention, it is possible to provide a front structure for a vehicle that can suppress a decrease in heat exchange efficiency of a heat exchanger even in a vehicle in which a body is mounted on a frame.

1 is a side view of a vehicle employing a vehicle front structure according to an embodiment of the present invention. FIG. 1 is a front view showing a front structure of a vehicle according to an embodiment of the present invention. FIG. 1 is a front view of a foamed resin member according to an embodiment of the present invention. FIG. 3 is a front view showing the state of a foamed resin member in the process of attaching a frame to a body according to an embodiment of the present invention. FIG. 7 is a front view showing the movement of the second portion when the foamed resin member according to the embodiment of the present invention is crushed. FIG. 3 is a front view showing the state of the foamed resin member in the process of attaching the heat exchanger according to the embodiment of the present invention. FIG. 7 is a front view showing a foamed resin member according to another embodiment of the present invention.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In the following specification, the longitudinal direction of the vehicle C shown in FIG. 1 is indicated as Q in the drawings, and the front side is indicated as F. Further, the left-right direction (an example of the vehicle width direction) of the vehicle C is indicated as P in the drawing, and the right side of the vehicle C when viewed from the rear is indicated as R. Furthermore, the vertical direction of the vehicle C is marked as J in the drawing, and the upper side is marked as U.

As shown in FIG. 1, a vehicle front structure 10 according to an embodiment of the present invention is a vehicle C front structure 10 in which a body 4 is mounted on a frame 2. As shown in FIG. As shown in FIG. 2, frame 2 is, for example, a ladder frame. The frame 2 has a pair of left and right hollow side members 2a each having a rectangular cross section. The body 4 includes a pair of left and right hollow frame members 4a each having a rectangular cross section and arranged above the side member 2a. The vehicle inner side surface 4b of the frame member 4a of the body 4 is located on the vehicle inner side in the left-right direction P than the vehicle inner side surface 2b of the side member 2a of the frame 2.

As shown in FIG. 1, the front structure 10 of the vehicle C includes a heat exchanger 12 and a foamed resin member 14. Heat exchanger 12 is arranged in front of internal combustion engine 6 and cools internal combustion engine 6. As shown in FIG. 2, the heat exchanger 12 is mounted on the vehicle C with the body 4 and frame 2 attached. The heat exchanger 12 is fixed to the frame member 4a of the body 4 after being mounted on the vehicle C. Width W of heat exchanger 12
is slightly shorter than the gap between the inner surfaces 4b of the pair of skeleton members 4a. Attachment fittings 12a that are attached to the body 4 are provided on both sides of the upper surface of the heat exchanger 12 in the left-right direction P.

The foamed resin member 14 is arranged between the skeleton member 4a of the body 4 and the side member 2a of the frame 2 and between the heat exchanger 12 and the side member 2a of the frame 2. As shown in FIG. 3, the foamed resin member 14 is made of, for example, sponge. The foamed resin member 14 has a first portion 20, a second portion 22, and a third portion 24 whose boundaries are indicated by a two-dot chain line and a one-dot chain line.

The first portion 20 fills the gap between the skeleton member 4a of the body 4 and the side member 2a of the frame 2. The first portion 20 includes a pasting portion 20c having a first surface 20a, a second surface 20b located on the frame 2 side of the first portion 20 and forming a boundary surface with the third portion 24, and an interference prevention portion. 20d. The attachment portion 20c is attached to the skeleton member 4a of the body 4. The attachment portion 20c has a first surface 20a that is in contact with the lower surface of the skeleton member 4a of the body 4, and a vertical surface 20e that is in contact with the outer surface of the skeleton member 4a. Therefore, the attachment portion 20c is configured with a step that contacts the skeleton member 4a of the body 4 on two sides, vertically and horizontally. Thereby, the foamed resin member 14 can be positioned with respect to the body 4 in the left-right direction P and the up-down direction J.

The length L1 of the first portion 20 in the vertical direction J is the length L2 of the gap in the vertical direction between the frame member 4a of the body 4 when the body 4 is attached to the frame 2 and the side member 2a of the frame 2. (see Figure 2). The length L1 is represented by the distance between the first surface 20a and the second surface 20b of the attachment portion 20c. Since the length L1 is longer than the length L2 of the gap, the first portion 20 is compressed and crushed in the vertical direction U in addition to the third portion 24. Therefore, the gap between the frame member 4a of the body 4 and the side member 2a of the frame 2 can be reliably filled. The interference prevention portion 20d is arranged diagonally toward the second surface 20b. The interference prevention portion 20d is provided to prevent interference with components disposed outside the side member 2a of the frame 2 in the left-right direction P.

The width of the second portion 22 is slightly larger than the gap G between the outer surface 12b of the heat exchanger 12 and the side member 2a of the frame 2 when the heat exchanger 12 is mounted. Therefore, the second portion 22 can reliably fill the gap G (see FIG. 2) between the side member 2a and the heat exchanger 12. The second portion 22 extends from the first portion 20, extends linearly from the inside in the left-right direction P, and then has a third surface 22a on the frame 2 side that extends obliquely in a direction away from the first portion 20.

The third portion 24 diagonally connects a second surface 20b of the first portion 20 located on the frame 2 side and a third surface 22a of the second portion 22 located on the frame 2 side. The third portion 24 has a fourth surface 24a, a fifth surface 24b connected to the fourth surface 24a, and a sixth surface 24c connected to the fourth surface 24a and the fifth surface 24b. The fourth surface 24a is provided at the boundary with the first portion 20. The fifth surface 24b is provided at the boundary with the second portion 22. The sixth surface 24c is located on the frame 2 side and connects the second surface 20b and the third surface 22a. Therefore, the third portion 24 is formed into a right triangular shape with a fourth surface 24a, a fifth surface 24b, and a sixth surface 24c. When the third portion 24 is not crushed, the sixth surface 24c of the third portion 24 is located on an extension surface of the third surface 22a of the second portion 22.

As a result, the third surface 22a is seamlessly connected to the sixth surface 24c, and the tip of the second portion 22 is disposed closer to the vehicle center than the vehicle inner side surface 2b of the frame 2. Therefore, the third portion 24 is formed obliquely and linearly together with the second portion 22 away from the frame 2 .

Therefore, when the body 4 is attached to the frame 2, the second portion 22 can be prevented from being bent and caught on the upper surface of the frame 2. Further, even if the position of the second portion 22 is shifted in the left-right direction P due to the individual difference between the body 4 and the frame 2, it is possible to suppress the second portion 22 from being caught on the upper surface of the frame 2.

The third portion 24 becomes longer in the compression direction, that is, in the vertical direction J, toward the second portion 22 side. Therefore, when the third portion 24 is crushed, the amount of crushing increases toward the second portion 22, and the second portion 22 is pulled and rotated around the axis in the front-rear direction Q.

The fourth surface 24a overlaps more than half of the second surface 20b in the left-right direction P. Furthermore, when the fourth surface 24a of the third portion is projected onto the first surface 20a of the attachment portion 20c that the body 4 of the first portion 20 contacts, the projection plane on which the fourth surface 24a is projected onto the attachment portion 20c is: More than half overlaps with the first surface 20a in the left-right direction P. The fifth surface 24b of the third portion 24 located on the second portion 22 side overlaps the third surface 22a by more than half.

According to this configuration, since the fourth surface 24a of the third portion 24 overlaps more than half of the first surface 20a and the second surface 20b in the left-right direction P, the force transmitted to the third portion 24 increases. Therefore, when the body 4 is attached to the frame 2, the third portion 24 is easily crushed. Thereby, the second portion 22 is pulled by the third portion 24, and the second portion 22 is easily rotated toward the frame 3 side. As a result, the second portion 22 easily follows the frame 2.

The thickness of the foamed resin member 14 including the first portion 20, the second portion 22, and the third portion 24 is greater than the difference D between the vertical length L1 of the first portion 20 and the gap L2. That is, the thickness of the foamed resin member 14 is greater than the amount of collapse D of the first portion 20. Thereby, when the second portion 22 is pulled by the third portion 24 and the second portion 22 rotates toward the frame 2, the second portion 22 becomes difficult to fall down in the front-rear direction Q.

When assembling the front structure 10 of the vehicle C configured as described above, the body 4 is placed above the frame 2 having the pair of side members 2a. The attachment portions 20c of the two foamed resin members 14 are attached in advance to each of the pair of skeleton members 4a so that the second portions 22 are opposed to each other. This state is shown in FIG. In FIG. 4, the foamed resin member 14 on the left side is illustrated. In this state, the body 4 is lowered. When the body 4 is lowered, the second portion 22 is disposed diagonally, so that the second portion 22 is not caught on the side member 2a of the frame 2. Therefore, the second portion 22 does not deform when the body 4 is assembled.

As shown in FIG. 5, the length L1 between the first surface 20a and the second surface 20b of the first portion 20 of the foamed resin member 14 is longer than the gap L2 between the body 4 and the frame 2. Therefore, when the body 4 is attached to the frame 2, the first portion 20 as well as the third portion 24 will be crushed. Further, since the fourth surface 24a of the third portion 24 overlaps more than half of the first surface 20a and the second surface 20b in the left-right direction P, the force transmitted to the third portion 24 increases. Therefore, when the body 4 is attached to the frame 2, the third portion 24 is more likely to be crushed. As a result, the second portion 22 is pulled toward the body 4 by the third portion 24, and the second portion 22 is easily rotated toward the frame 2. As a result, the second portion 22 easily follows the frame 2.

When the body 4 is attached to the frame 2, as shown in FIG. lower it. Finally, the mounting bracket 12a is fixed to a fastening member such as a bolt to complete the installation of the heat exchanger 12. Thereby, the gap between the body 4 and the frame 2 and the gap between both sides of the heat exchanger 12 and the frame 2 are closed by the left and right foamed resin members 14. As a result, hot air generated from the internal combustion engine 6 is difficult to flow forward of the heat exchanger 12. Thereby, a decrease in heat exchange efficiency of the heat exchanger 12 can be suppressed. Thereby, the cooling efficiency of the internal combustion engine 6 can be improved.

As explained above, according to the present invention, it is possible to provide the front structure 10 for a vehicle C that can suppress a decrease in heat exchange efficiency of the heat exchanger 12 even in a vehicle C in which the body 4 is attached to the frame 2. .

<Other embodiments>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the invention. In particular, the plurality of modifications described in this specification can be arbitrarily combined as necessary.

(a) In the above embodiment, the second portion 22 extends obliquely from the first portion 20, but the present invention is not limited thereto. In other embodiments, the second portion 122 may extend linearly downward from the first portion, as shown in FIG. 7 . Also in this case, since the second portion 122 rotates toward the side member 2a of the frame 2 by crushing the third portion 24, the second portion 122 comes into close contact with the side member 2a.

(b) In the embodiment described above, the present invention has been described using the heat exchanger 12 that cools the internal combustion engine 6 as an example, but the present invention is not limited thereto. In a vehicle equipped with an air conditioner, a heat exchanger that cools the refrigerant of the air conditioner is arranged, for example, in front of the heat exchanger 12 for the internal combustion engine 6. Therefore, according to the present invention, the hot air generated by the internal combustion engine becomes difficult to flow forward of the heat exchanger 12 and the heat exchanger for the air conditioner, so that the heat exchange efficiency of the heat exchanger for the air conditioner is reduced. It can be suppressed. Therefore, the cooling efficiency of the internal combustion engine 6 can be improved, as well as the cooling efficiency of the air conditioner.

C: vehicle, 2: frame 2: body, 10: front structure of vehicle, 12: heat exchanger, 14: foamed resin member, 20: first part, 22: second part, 24: third part, 20a : 1st surface, 20b: 2nd surface, 22a: 3rd surface, 24a: 4th surface, 24b: 5th surface, 24c: 6th surface

Claims (8)

A front structure of a vehicle in which a body is attached to a frame,
a heat exchanger mounted with the body and the frame attached;
a foamed resin member disposed between the body and the frame and between the heat exchanger and the frame ;
Equipped with
The foamed resin member is
a first portion that fills a gap between the body and the frame;
a second portion extending from the first portion along the inside of the frame in a state where the body is attached to the frame;
a third portion that connects the first portion and the second portion diagonally and is crushed by the frame while the body is attached to the frame;
has
The second portion is disposed between the frame and the heat exchanger with the heat exchanger mounted thereon.
Vehicle front structure. the first portion extends in the vehicle width direction; the second portion extends downward from the first portion;
The first portion has a first surface located on the body side , extending in the vehicle width direction, and contacting a lower surface of the body , and a second surface located on the frame side , extending in the vehicle width direction. ,
The second portion has a third surface located on the frame side and extending in the vehicle vertical direction ,
The third portion is provided at a boundary portion between the first portion and the third portion, and a fourth surface that overlaps the second surface , and a fourth surface provided at the boundary portion between the second portion and the third portion. a fifth surface that overlaps the third surface ; and a sixth surface that is located on the frame side, extends diagonally from the end of the fourth surface in the vehicle width direction, and is connected to the lower end of the fifth surface. and,
the sixth surface connects the second surface and the third surface;
The vehicle front structure according to claim 1. The fourth surface overlaps more than half of the second surface in the vehicle width direction.
When the fourth surface is projected onto the first surface of the first portion, a projection surface obtained by projecting the fourth surface onto the first surface overlaps more than half of the first surface in the vehicle width direction.
The vehicle front structure according to claim 2. The fifth surface overlaps more than half of the third surface,
The vehicle front structure according to claim 2 or 3. When the third portion is not crushed, the third surface of the second portion extends diagonally below the fifth surface of the third portion,
When the third portion is not crushed, the sixth surface of the third portion located on the frame side is located so as to overlap an extension surface obtained by extending the third surface in an oblique direction.
The vehicle front structure according to any one of claims 2 to 4.
The length from the first surface to the second surface of the first portion is longer than the distance from the body to the frame in the vehicle vertical direction when the body is attached to the frame.
The vehicle front structure according to any one of claims 2 to 5.
The thickness of the foamed resin member is greater than the difference between the length of the first portion in the vehicle vertical direction and the length of the gap.
The vehicle front structure according to claim 6.
The vehicle inner surface of the body is located further inside the vehicle than the vehicle inner surface of the frame.
The front structure of a vehicle according to any one of claims 1 to 7.