Front grille for vehicle

Abstract

To provide a front grille for a vehicle which can be manufactured with fewer manufacturing steps and lower manufacturing cost, and can prevent sound generated by a device disposed on the rear side of the front grille from leaking to the outside of the vehicle through the front grille.SOLUTION: A front grille for a vehicle includes: an outer peripheral frame which is provided at the front end of the vehicle; a rod-shaped member 25 which is provided on the inner peripheral side of the outer peripheral frame so as to extend in the vehicle left-right direction, and in which an elongated groove 26 that extends in the vehicle left-right direction and opens only at the rear surface is formed on the rear surface; a bent-space forming portion 30 which is provided inside the elongated groove so as to extend in the vehicle left-right direction and forms a bent space 32 whose cross-sectional shape orthogonal to the vehicle left-right direction becomes the laterally oriented U-shape that opens at the rear part between the inner surface of the elongated groove and itself; an intermediate groove 31 which is formed on the rear surface of the bent-space forming portion and opens only at the rear surface; and a partition wall 31A which is provided inside the intermediate groove and partitions the intermediate groove into multiple spaces.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vehicle front grille.

Background Art

[0002] The following Patent Document 1 discloses a vehicle front grille. This vehicle front grille includes an outer peripheral frame, a rod-shaped member provided on the inner peripheral side of the outer peripheral frame so as to extend in the vehicle left-right direction, and having a groove (space portion) that extends in the vehicle left-right direction and is open only at the rear surface formed on the rear surface, a plurality of partition walls that partition the space portion into a plurality of spaces, and a sound absorbing material that covers the rear end opening of the groove.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The vehicle front grille of the above Patent Document 1 requires a sound absorbing material separate from the front grille, so there is room for improvement in terms of the man-hours and manufacturing costs when manufacturing the front grille.

[0005] In consideration of the above facts, an object of the present invention is to obtain a vehicle front grille that can be manufactured with fewer manufacturing man-hours and lower manufacturing costs, and that can suppress the leakage of sound generated from a device provided behind the front grille to the outside of the vehicle through the front grille.

Means for Solving the Problems

[0006] The front grille for a vehicle according to the invention described in claim 1 includes an outer peripheral frame provided at the front end of the vehicle, a rod-shaped member provided on the inner peripheral side of the outer peripheral frame so as to extend in the vehicle left-right direction, and having a long groove formed on the rear surface that extends in the vehicle left-right direction and is open only at the rear surface, a bending space forming portion provided in the long groove so as to extend in the vehicle left-right direction, and forming a bending space having a lateral U-shaped cross-section with an open rear portion between the inner surface of the long groove and the bending space forming portion, an intermediate groove formed on the rear surface of the bending space forming portion and open only at the rear surface, and a partition wall provided inside the intermediate groove and partitioning the intermediate groove into a plurality of spaces.

[0007] In the front grille for a vehicle according to the invention described in claim 1, when a device (for example, a fan) provided behind the front grille emits sound, the sound passes through the bending space from one or both openings of the bending space and is discharged from the other opening. When the sound passes through the bending space having a U-shaped cross-section and is discharged from the other opening in this way, the sound is silenced by the interference of sound waves having a phase difference with the sound passing outside the rod-shaped member. Further, the sound that enters the intermediate groove formed on the rear surface of the bending space forming portion and partitioned into a plurality of spaces by the partition wall is reflected inside the space and, when discharged to the outside of the space, interferes with the sound entering the space partitioned later, thereby being silenced by the interference of sound waves. Therefore, the front grille for a vehicle according to the invention described in claim 1 can suppress the sound generated by a device provided behind the front grille from leaking outside the vehicle through the front grille.

[0008] The front grille for a vehicle according to the invention described in claim 1 does not require a sound-absorbing material separate from the front grille. Therefore, the front grille for a vehicle according to the invention described in claim 1 can be manufactured with fewer manufacturing steps and at a low manufacturing cost.

Advantages of the Invention

[0009] The front grille for a vehicle according to the present invention can be manufactured with fewer manufacturing steps and at a low manufacturing cost, while suppressing the sound generated by a device provided behind the front grille from leaking outside the vehicle through the front grille.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the front grille for a vehicle according to the present invention will be described with reference to the drawings. The arrow FR appropriately shown in the drawings indicates the front side in the vehicle front-rear direction, the arrow LH indicates the left side in the vehicle left-right direction, and the arrow UP indicates the upper side in the vehicle up-down direction.

[0012] The front grille 15 for a vehicle of the present embodiment (hereinafter, the front grille 15) is provided at the front end of the vehicle body 11 of the vehicle 10. The front grille 15 of the present embodiment is an integrally molded product made of resin, and includes an outer peripheral frame 20, a first partition wall 24, a rod-shaped member 25, and a bending space forming portion 30.

[0013] The left and right dimensions of the outer peripheral frame 20 having a substantially rectangular front shape are larger than the up and down dimensions. The outer peripheral frame 20 includes a pair of left and right side portions 21, an upper portion 22 connecting the upper ends of the left and right side portions 21, and a lower portion 23 connecting the lower ends of the left and right side portions 21. Further, the front grille 15 includes three first partition walls 24 connecting the upper portion 22 and the lower portion 23.

[0014] A plurality of rod-shaped members 25 are provided vertically side by side between the left and right side portions 21 and the first partition wall 24 and between adjacent first partition walls 24. Each rod-shaped member 25 extends in the left-right direction. Each rod-shaped member 25 located on the leftmost side is connected to the left side portion 21 and the left first partition wall 24. Each rod-shaped member 25 located on the rightmost side is connected to the right side portion 21 and the right first partition wall 24. Further, each rod-shaped member 25 located between the left first partition wall 24 and the central first partition wall 24 is connected to the left first partition wall 24 and the central first partition wall 24. Further, each rod-shaped member 25 located between the right first partition wall 24 and the central first partition wall 24 is connected to the right first partition wall 24 and the central first partition wall 24. Spaces are formed respectively between the rod-shaped member 25 located at the uppermost position and the upper portion 22, between the rod-shaped member 25 located at the lowermost position and the lower portion 23, and between vertically adjacent rod-shaped members 25.

[0015] Further, on the rear surface of each rod-shaped member 25, a long groove 26 extending in the left-right direction is formed over the entire length of the rod-shaped member 25. The rear portion of the long groove 26 is open and the front portion is closed. As shown in FIG. 3, the rear end of the upper portion of the rod-shaped member 25 is located behind the rear end of the lower portion. The cross-sectional shape of the rod-shaped member 25 perpendicular to the left-right direction is a horizontally U-shaped with the rear portion open. The "U-shaped" in this specification includes a complete U-shape, a substantially U-shape, a complete V-shape, and a substantially V-shape.

[0016] As shown in FIGS. 2 and 3, each rod-shaped member 25 is provided with a bending space forming portion 30 extending in the left-right direction in the long groove 26. The cross-sectional shape of the bending space forming portion 30 perpendicular to the left-right direction is a horizontally U-shaped with the rear portion open. That is, an intermediate groove 31 is formed over the entire length of the bending space forming portion 30 on the rear surface of the bending space forming portion 30. In the intermediate groove 31 of the bending space forming portion 30, a second partition wall 31A for partitioning the intermediate groove 31 into a plurality of spaces is provided.

[0017] A bending space 32 is formed between the inner surface of the long groove 26 of each rod-shaped member 25 and the outer surface of the bending space forming portion 30, and the cross-sectional shape perpendicular to the left-right direction is a horizontally U-shaped with the rear portion open.

[0018] An engine room (not shown) is provided at the front part of the vehicle body 11, immediately behind the outer peripheral frame 20. Various devices are provided in this engine room. These devices include, for example, at least one of a drive source (at least one of an electric motor and an engine) and a fan of the vehicle 10.

[0019] Next, the operation of the front grille 15 will be described.

[0020] For example, when the fan 40 (see FIG. 1) provided in the engine room rotates, a sound SD is generated from the fan 40. Further, the engine and the electric motor also generate the sound SD.

[0021] A part (sound SD1) of the sound SD generated by the fan 40 etc. enters the bent space 32 from one or both of the openings of any of the bent spaces 32, for example, and is discharged rearward from the other opening of this bent space 32. When the sound SD1 passes through the bent space 32 having a U-shaped cross section and is discharged from the other opening like this, it is silenced by the interference of sound waves having a phase difference from the sound SD3 passing outside the rod-shaped member. Further, when the sound SD2 that has entered each space of the intermediate groove 31 formed on the rear surface of the bent space forming portion 30 is reflected by the inner surface of each space and discharged to the outside of the space, it interferes with the sound that enters each space later, and is silenced by the interference of sound waves. Therefore, the front grille 15 of the present embodiment can suppress the sound SD generated from the devices provided behind the front grille 15 from leaking to the front of the vehicle 10 through the opening of the front grille 15.

[0022] Furthermore, the front grille 15 does not require a sound absorbing material separate from the front grille 15. Therefore, the front grille 15 can be manufactured with fewer manufacturing man-hours and lower manufacturing costs compared to the case where a sound absorbing material is required.

[0023] Furthermore, the front grille 15 includes a bent space forming portion 30 located in the long groove 26 of each rod-shaped member 25. Therefore, the rigidity of the front grille 15 (rod-shaped member 25) is higher compared to the case where the bent space forming portion 30 is not provided.

[0024] As described above, the vehicle front grille according to the embodiment has been described. However, within the scope not departing from the gist of the present invention, design changes can be made as appropriate.

[0025] For example, as in the modified example shown in FIG. 4, at least one (for example, a plurality) of connecting portions 27 may be provided at the front end portion of the bending space forming portion 30, and the connecting portion 27 may be connected to the front end portion of the inner surface of the long groove 26. According to this modified example, the rigidity of the outer peripheral frame 20 (rod-shaped member 25) becomes even higher.

[0026] The material constituting the outer peripheral frame 20 may be a material other than resin.

Explanation of Reference Numerals

[0027] 10 Vehicle 15 Front grille (vehicle front grille) 20 Outer peripheral frame 25 Rod-shaped member 26 Long groove 30 Bending space forming portion 31 Intermediate groove 32 Bending space 31A Second partition wall (partition wall)

Claims

【Claim 1】 An outer peripheral frame provided at the front end of a vehicle, a rod-shaped member provided on the inner peripheral side of the outer peripheral frame so as to extend in the vehicle left-right direction, and having a long groove formed on the rear surface that extends in the vehicle left-right direction and is open only at the rear surface, a bending space forming portion provided inside the long groove so as to extend in the vehicle left-right direction, and forming a bending space having a lateral U-shaped cross section orthogonal to the vehicle left-right direction and open at the rear portion between the inner surface of the long groove, an intermediate groove formed on the rear surface of the bending space forming portion and open only at the rear surface, a partition wall provided inside the intermediate groove and partitioning the intermediate groove into a plurality of spaces, A vehicle front grille comprising the above.

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