JP2010132122A - Front part structure of vehicle body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To absorb an impact load applied from a front side of a vehicle body by positively crushing a resonator. <P>SOLUTION: The front part structure of the vehicle body 30 includes: a front side frame 18 extended in a longitudinal direction of the vehicle body; a front wheel 22 provided at a side of the front side frame 18; and the resonator 31 arranged in the front side of the front wheel 22, and reducing a suction sound of a suction device. The resonator 31 is supported by a bracket 32 which holds the resonator 31 until the resonator 31 is crushed when the load is applied from the front side of the vehicle body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle body front portion structure capable of absorbing an impact load acting on a front corner portion of a vehicle body from the front of the vehicle body.

As a vehicle body front part structure, a structure in which an impact load acting from the front of the vehicle body can be absorbed is known.
This type of vehicle front structure has a shock absorbing member on the front of the bumper beam so that it can absorb the impact load acting from the front of the vehicle, and the radiator and condenser can be moved to the rear of the vehicle. Attempts have been made.

As such a vehicle body front structure, a structure is known in which a resonator for reducing the intake noise of the intake device is disposed around the front end of the front side frame (see, for example, Patent Document 1).
JP 2006-1336 A

  In the vehicle body front structure of Patent Document 1, a radiator holding portion (bulk head) is provided on the front surface of the vehicle body, the front end of the front side frame is connected to the rear of the radiator holding portion, and the front and rear ends of the radiator holding portion A resonator for reducing the intake noise of the intake device is attached to the outside of the side frame.

However, in the front part structure of the vehicle body, the resonator is arranged at the front corner part of the vehicle body for the convenience of the layout of the vehicle body part, and the resonator is crushed to absorb the impact load acting from the front of the vehicle body. It is not intended to absorb energy. That is, the resonator is not positioned as a member that absorbs energy, and the current mounting structure is insufficient as a member that absorbs energy.
When an impact load is applied from the front of the vehicle body, it is desirable to actively crush the resonator to absorb the impact.

  An object of the present invention is to provide a vehicle body front structure that can improve the absorption efficiency of an impact load acting from the front of a vehicle body by actively crushing the resonator.

  According to the first aspect of the present invention, a front side frame extending in the longitudinal direction of the vehicle body, a front wheel provided on a side of the front side frame, and a front wheel of the front side frame are disposed in front of the front wheel to reduce intake noise of the intake device. A vehicle body front part structure including a resonator designed to be supported by a bracket that holds the resonator until the resonator is crushed when a load is applied from the front of the vehicle body.

  The invention according to claim 2 is characterized in that an energy absorbing member for absorbing energy is arranged on the front surface of the resonator.

  The invention according to claim 3 is characterized in that an outer bent portion that allows the front side frame to be bent is provided at a front portion of the front side frame.

In the invention according to claim 1, the vehicle body front part structure is disposed in the front and rear direction of the vehicle body, the front wheel provided on the side of the front side frame, and disposed in front of the front wheel. And a resonator that reduces intake noise.
When a load is applied from the front of the vehicle body, the resonator is supported by a bracket that holds the resonator until the resonator is crushed. Thereby, the resonator can be sufficiently crushed to absorb the shock. That is, the impact load absorption efficiency can be improved.
For example, when the front corner portions of the vehicles collide with each other, the front corner portion of the opponent vehicle can be received by the resonator of the own vehicle.

  In the invention which concerns on Claim 2, since the energy absorption member which aims at energy absorption has been arrange | positioned in the front surface of the resonator, the initial load of energy absorption of a resonator can be raised. Thereby, the energy absorption amount can be increased.

  In the invention according to claim 3, since the outer folding portion that allows the front side frame to be bent is provided at the front portion of the front side frame, for example, when there is a collision between vehicles, the front side frame of the host vehicle Can be folded outward to reduce the aggression on the opponent vehicle.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a vehicle body front portion of a vehicle that employs a vehicle body front structure according to the present invention, FIG. 2 is a plan view of the vehicle body front portion shown in FIG. 1, and FIG. It is a perspective view of the vehicle body front part made.
The vehicle 10 includes a front bumper 14 provided in front of the vehicle body 11 at a front portion of the vehicle body 11, a front bulkhead 17 provided behind the front bumper 14 and supporting a radiator (not shown) and a capacitor, A front side frame 18 extending from the front bulkhead 17 to the rear of the vehicle body, a resonator 31 disposed outside the front side frame 18 for reducing intake noise of an intake device (not shown), and a front side frame A front wheel 22 located outside the frame 18 and behind the resonator 31, a front pillar 23 forming a skeleton on the front side of the vehicle compartment 12, and an upper connecting the middle of the front pillar 23 and the front bulkhead 17. A frame (upper member) 24 and a side sill extending from the lower end of the front pillar 23 toward the rear of the vehicle body And a 5.

FIG. 4 is a perspective view of the vehicle body front structure according to the present invention, and FIG. 5 is an exploded perspective view showing main components of the vehicle body front structure shown in FIG.
The vehicle body front structure 30 is attached to the front side frame 18, the resonator 31, the front wheel 22, the front pillar 23, the side sill 25, and the front side frame 18 shown above, and a load acts from the front of the vehicle body. Sometimes, it is composed of a bracket 32 that holds the resonator 31 until the resonator 31 is crushed.

  The front side frame 18 extends from the front bulkhead 17 to the front horizontal portion 33 that extends rearward substantially horizontally, and extends obliquely downward from the rear end of the front horizontal portion 33 to the dashboard 27 (FIG. 2). (See FIG. 4) and a rear horizontal portion 35 that extends substantially horizontally from the rear end of the inclined portion 34 and supports the passenger compartment floor (not shown).

  The front horizontal portion 33 is formed outside the vehicle width in the vicinity of the front end, and is formed at a position behind the resonator mounting portion 37 to which the resonator 31 is attached, and the rear portion of the resonator mounting portion 37 is urged to bend outward in the vehicle width. 1, and a bracket mounting portion 38 for mounting the bracket 32, and a rear position of the bracket mounting portion 38. A resonator 31 (resonator body 45) is formed between the second outer bent portion 42 that is formed outwardly of the width and facilitates bending outward of the vehicle width, and the first outer bent portion 41 and the bracket mounting portion 38. And a resonator receiving portion 43 that receives the side surface 45b and the lower surface 45c.

  The first and second outer bent portions 41 and 42 are portions that assist the front side frame 18 to be bent outwardly of the vehicle width when a load is input from the front of the vehicle body, and bend in advance. This is a part where considerations such as forming a notch and reducing the cross-sectional area are made. Further, the resonator receiving portion 43 has a substantially L-shaped surface.

  The resonator 31 is formed of a resin into a predetermined shape, and is attached to a resonator main body 45 having a space portion, a resonator mounting portion 37, a support holder 46 that supports the front end of the resonator main body 45, and an adhesive to the front surface of the support holder 46. An energy absorbing member 48 that is attached via a member 47 and absorbs a load input from the front of the vehicle body. The front end of the support holder 46 and the resonator main body 45 is fastened to the resonator attaching portion 37 with a plurality of attachment screws 49. Is done.

The resonator body 45 is formed with a plurality of through holes 51 through which the mounting screws 49 pass.
The support holder 46 includes left and right clamping parts 52, 52 that sandwich the front end of the resonator body 45, a plurality of through holes 53 that are formed in the clamping parts 52, 52, through which the mounting screws 49 pass, and an energy absorbing member 48. And an adhesion surface 54 to be adhered.

The adhesive member 47 is preferably a double-sided tape or an adhesive, and a double-sided tape and an adhesive may be used in combination.
The energy absorbing member 48 is preferably a foam formed of resin.

The bracket 32 includes a stay member 56 attached to the bracket attachment portion 38 and a planar receiving member 57 supported by the stay member 56 and receiving the rear surface 45a of the resonator body 45, and a plurality of attachments are attached to the bracket attachment portion 38. Fastened with screws 58.
The stay member 56 is formed with a plurality of through holes 59 through which the mounting screws 58 pass.

As shown in FIGS. 1 to 5, the vehicle body front structure 30 includes a front side frame 18 that extends in the vehicle longitudinal direction, a front wheel 22 that is provided on the side of the front side frame 18, and the front wheel. And a resonator 31 that is disposed in front of the air intake 22 and reduces intake noise of an intake device (not shown).
The resonator 31 is supported by a bracket 32 that holds the resonator 31 until the resonator 31 is crushed when a load is applied from the front of the vehicle body. As a result, the resonator 31 can be sufficiently crushed to absorb the shock. That is, the impact load absorption efficiency can be improved.

  As shown in FIG. 5, in the vehicle body front structure 30, the energy absorbing member 48 that absorbs energy is disposed on the front surface of the resonator 31, so that the initial load of energy absorption of the resonator 31 can be increased. Thereby, the energy absorption amount can be increased.

That is, as shown in FIGS. 1 and 2, the load input from the front of the vehicle body to the vehicle body corner portion 26 as indicated by arrows A1 and B1 is transmitted to the resonator 31 as indicated by arrows A2 and B2, and the energy absorbing member 48 is transmitted. While the load is absorbed by the resonator main body 45 and the rear bracket 32, the load is transmitted to the front wheel 22 as indicated by arrows A3 and B3. Is transmitted to.
Therefore, when the front corner portions of the vehicles collide with each other, the resonator 31 of the host vehicle 10 can receive the front corner portion of the opponent vehicle (not shown), and the damage to the opponent vehicle can be reduced.

  In the vehicle body front structure 30, a resonator 31 is installed in front of a front wheel (front tire) 22, a bracket 32 is provided behind the resonator 31, the resonator 31 is actively crushed, and the resonator 31 is subjected to energy absorption and load transmission. It can be said that it was used for.

Further, the resonator 31 is provided with an energy absorbing member 48 on the front surface of the resonator main body 45 so as to absorb a load (collision load) input from the front of the vehicle body to the vehicle body corner portion 26 from the initial stage, so that the energy absorbing member 48 → the resonator. The load transmission path 61 is constructed in the order of the main body 45 → the bracket 32 → the front wheel (front tire) 22 → the side sill 25 (including the lower portion of the front pillar 23).
Also, load absorption can be adjusted by changing the hardness or thickness of the energy absorbing member 48.

FIGS. 6A and 6B are operation explanatory views showing an example of a modification of the vehicle body front structure according to the present invention.
In (a), in the vehicle body front part structure 30, the front side frame 18 is provided with first and second outer bent portions 41, 42 that are urged to bend outward in the vehicle width, and a load transmission path. 61 is built.

  In general, corner collisions between vehicles with a low overlap ratio cause a “front of the frame” where the rigid front sides of the vehicles pass each other, and if the collision energy is small, both vehicles can cause tremendous damage. An event may occur.

  In (b), when a collision (corner collision) between the host vehicle 10 and the partner vehicle occurs and the front side frame Fa of the partner vehicle enters the host vehicle 10, the front side frame Fa of the partner vehicle absorbs energy. The load can be transmitted / absorbed through the load transmission path 61 in the order of the member 48 → the resonator body 45 → the bracket 32 → the front wheel (front tire) 22 → the side sill 25 (including the lower portion of the front pillar 23).

  Further, by providing the front side frame 18 with the first and second outer bent portions 41 and 42, the front side frame 18 is forcibly deformed outward, and the front side frame 18 of the host vehicle 10 enters the opponent vehicle. Can be prevented.

  That is, in the vehicle body front part structure 30, since the outer folding parts 41 and 42 that allow the front side frame 18 to be bent are provided at the front part of the front side frame 18, for example, when there is a collision between vehicles, The front side frame 18 of the host vehicle 10 can be folded outward to reduce aggression on the opponent vehicle.

FIGS. 7A to 7C are comparative study diagrams showing differences in the vehicle body front structure according to the present invention.
In (a), the vehicle body front part structure 100 of the comparative example 1 is shown. The vehicle body front part structure 100 is arranged on the front side frame 101 and in front of the front wheels, a resonator 102 for reducing intake noise of an intake device (not shown). When a load is input from the front of the vehicle body, the resonator 102 is easily moved rearward.
Accordingly, the resonator 102 is insufficient as a member that absorbs energy, and cannot function as a member that absorbs energy.

  In (b), the vehicle body front structure 110 of Comparative Example 2 is shown. The vehicle body front structure 110 absorbs energy between the side of the front side frame 111 and the tip of the upper frame (upper member) 112. The member 113 is provided, and once the absorbing member 113 is set, it is difficult to change and the degree of design freedom is poor.

  In (c), the vehicle body front part structure 30 of the embodiment is shown. In the vehicle body front part structure 30, the bracket 32 for supporting (holding) the resonator main body 45 is provided on the rear surface 45a of the resonator main body 45. As shown, the load transmission path 61 can be constructed in the order of energy absorbing member 48 → resonator body 45 → bracket 32 → front wheel (front tire) 22 → side sill 25 (including the lower portion of the front pillar 23), An energy absorption function can be added to the resonator 31.

  Further, since the energy absorbing member 48 is provided on the front surface of the resonator main body 45, the energy absorbing member 48 can be appropriately changed, and the degree of freedom in design is great.

FIGS. 8A to 8D are comparative study diagrams showing energy absorption states of the vehicle body front structure according to the present invention.
(A) is an operational view in which a load is input to the vehicle body front structure 100 of Comparative Example 1, and (b) is a graph showing an energy absorption state of the vehicle body front structure 100 of Comparative Example 1. In (b), the horizontal axis represents time, the vertical axis represents load, the symbol R1 represents the amount of energy absorbed by the resonator 102, the symbol F1 represents the amount of energy absorbed by the front wheels (front tires), and the symbol S1 represents the amount of energy absorbed by the side sills. .

  In (a), when a load is input from the front to the front end of the vehicle body as indicated by an arrow c1, the resonator 102 is easily moved as indicated by an arrow c2. Therefore, as indicated by reference numeral R1 in (b). The resonator 102 has only a minute energy absorption function.

  (C) is an operation diagram in which a load is input to the vehicle body front structure 30 of the embodiment, and (d) is a graph showing an energy absorption state of the vehicle body front structure 30 of the embodiment. In (d), time is plotted on the horizontal axis and load is plotted on the vertical axis, and symbol R2 denotes the amount of energy absorbed by the first and second outer bent portions 41 and 42 (see FIG. 5) of the front side frame 18 and the resonator 31, Reference sign F2 indicates the amount of energy absorbed by the front wheel (front tire) 22, and reference sign S2 indicates the amount of energy absorbed by the side sill 25.

  In (c), in the vehicle body front structure 30, first and second outer bent portions 41 and 42 (see FIG. 5) are formed on the front side frame 18, and the rear surface 45a of the resonator 31 (resonator body 45) is a bracket. 32, when a load is input from the front to the front end of the vehicle as indicated by an arrow c3, a bracket 32 is provided on the rear surface 45a of the resonator 31 as indicated by reference numeral R2 in (d). Therefore, the resonator 31 can perform a considerable amount of energy absorbing function.

  Specifically, the load input from the front to the front end of the vehicle as indicated by the arrow c3 is applied to the first and second outer bent portions 41 and 42, the energy absorbing member 48, and the resonator main body 45 as indicated by reference numeral R2. Energy is absorbed, as indicated by reference numeral F2, energy is absorbed by the front wheels (front tires) 22, and energy is absorbed by the side sill 25 as indicated by reference numeral S2.

FIG. 9 is a side view of a vehicle body front structure according to another embodiment of the present invention. The same members as those used in the vehicle body front structure 30 (see FIG. 5) are denoted by the same reference numerals, and detailed description thereof is omitted.
The vehicle body front structure 70 according to another embodiment includes a front side frame 18, a resonator 71, a front wheel 22, a front pillar 23, a side sill 25, and a bracket 32. The resonator 71 includes a resonator main body 45, a bracket 32 (see FIG. 5), and an energy absorbing member 78.

  The energy absorbing member 78 is a member that is formed to have a thickness t1 thicker than that of the energy absorbing member 48 of the resonator 71 and protrudes forward in the mounted state.

  FIG. 10 is a graph showing the energy absorption state of the vehicle body front structure shown in FIG. 9, where the horizontal axis represents time and the vertical axis represents load, and symbol R <b> 3 represents first and second outward folding of the front side frame 18. The amount of energy absorbed by the parts 41 and 42 and the resonator 71, symbol F3 indicates the amount of energy absorbed by the front wheel (front tire) 22, and symbol S3 indicates the amount of energy absorbed by the side sill 25.

  In FIG. 9, when a load is input from the front to the front end of the vehicle body as indicated by an arrow d1, first and second outer bent portions 41 and 42 (see FIG. 5) are formed on the front side frame 18, and the resonator 71 (resonator body 45) has a rear surface 45a supported by the bracket 32. Therefore, as shown by reference numeral R3 in FIG. 10, the resonator 71 has a further energy absorption function than the resonator 31 shown in FIG. An increase can be achieved. Moreover, the energy absorption member 78 starts to be absorbed quickly because the energy absorption member 78 protrudes to the front surface of the vehicle body.

  Specifically, the load input from the front to the front end of the vehicle as indicated by an arrow d1 is applied to the first and second outer bent portions 41 and 42, the energy absorbing member 78, and the resonator main body 45 as indicated by reference numeral R3. Energy is absorbed, as indicated by reference numeral F3, energy is absorbed by the front wheels (front tires) 22, and energy is absorbed by the side sill 25 as indicated by reference numeral S3.

  The vehicle body front structure 30 according to the present invention is provided only on one side of the vehicle body 11 as shown in FIG. 2, but is not limited to this and does not prevent the vehicle body front structure 30 from being provided on both sides of the vehicle body.

  The vehicle body front structure according to the present invention is suitable for use in passenger cars such as sedans and wagons.

It is a side view of the vehicle body front part of the vehicle which employ | adopted the vehicle body front part structure which concerns on this invention. It is a top view of the vehicle body front part shown by FIG. It is a perspective view of the vehicle body front part shown by FIG. It is a perspective view of the vehicle body front part structure concerning the present invention. It is a disassembled perspective view which shows the main components of the vehicle body front part structure shown by FIG. FIG. 5 is an operation explanatory diagram illustrating an example of a modification of the vehicle body front portion structure illustrated in FIG. 2. It is a comparative study figure which shows the difference in the vehicle body front part structure which concerns on this invention. It is a comparative study figure which shows the energy absorption state of the vehicle body front part structure which concerns on this invention. It is a side view of the vehicle body front part structure of another Example which concerns on this invention. 10 is a graph showing an energy absorption state of the vehicle body front part structure shown in FIG. 9.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle body, 18 ... Front side frame, 22 ... Front wheel, 30, 70 ... Vehicle body front part structure, 31, 71 ... Resonator, 32 ... Bracket, 41, 42 ... First and second outer folding parts, 48, 78 ... energy absorbing member.

Claims (3)

A front part of a vehicle body comprising a front side frame extending in the longitudinal direction of the vehicle body, a front wheel provided on the side of the front side frame, and a resonator disposed in front of the front wheel to reduce intake noise of the intake device Structure,
The vehicle body front structure, wherein the resonator is supported by a bracket that holds the resonator until the resonator is crushed when a load is applied from the front of the vehicle body.   The vehicle body front structure according to claim 1, wherein an energy absorbing member for absorbing energy is disposed on a front surface of the resonator.   2. The vehicle body front structure according to claim 1, wherein an outer bent portion that allows the front side frame to be bent is provided at a front portion of the front side frame.

Images