JP2013075559A - Buffer structure at time of vehicle collision - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more surely prevent injury to a pedestrian or damage to a vehicle component caused by an impact force by securing sufficient support stiffness of the vehicle component to the skeleton member of a car body during normal traveling of a vehicle and immediately reducing the impact force at vehicle collision.SOLUTION: The buffer structure includes a resin support bracket 32 extended from a vehicle component 24, and an extended end 32 is fastened to a skeleton member 3 by a fastening tool 34. In the trough-shaped part 39 of the midway of the support bracket 32 in an extending direction A, a fragile part 46 deformable by a shock force F to the vehicle component 24 at vehicle 1 collision is formed. The fragile part 46 is formed at the opening edge of a trough groove 43 in the trough-shaped part 39. The bottom 41 of the trough-shaped part 39 is formed to be away from an extended end 33 in the axial direction of the fastening tool 34, and the end surface 48 of the bottom 41 of the trough-shaped part 39 in the extending direction A is located near the skeleton member 3.

Description

  The present invention relates to a shock-absorbing structure at the time of a vehicle collision provided with a resin-made support bracket for supporting a vehicle component such as a headlamp on a skeleton member of a vehicle body.

  Conventionally, there is a buffer structure at the time of a vehicle collision shown in Patent Document 1 below. According to this publication, there is provided a resin-made support bracket that extends from a vehicle component and whose extended end is fastened to a skeleton member of a vehicle body by a fastener. A notch-shaped weak part that can be deformed by an impact force to the vehicle parts at the time of a vehicle collision is formed on the front and back of the middle part of the support bracket in the extending direction. In the event of a vehicle collision, the fragile portion is bent by the impact force on the vehicle parts and the impact force is alleviated, so that damage to pedestrians and vehicle parts due to the impact force is prevented. ing.

  In addition, there is a conventional buffer structure at the time of a vehicle collision as disclosed in Patent Document 2 below. According to this publication, there is provided a resin-made support bracket that extends from a vehicle component and whose extended end is fastened to a skeleton member of a vehicle body by a fastener. A midway portion in the extending direction of the support bracket has a trough shape, and a fragile portion that can be deformed by an impact force to the vehicle component at the time of a vehicle collision is formed at the bottom of the trough shape portion. In the event of a vehicle collision, the fragile portion is bent by the impact force on the vehicle parts and the impact force is alleviated, so that damage to pedestrians and vehicle parts due to the impact force is prevented. ing.

JP 2007-76568 A JP 2009-120137 A

  By the way, in the thing of the said patent document 1, a support bracket is made into a flat bar shape, and the weak part is formed in the surface of the thickness direction, and the back surface, respectively. For this reason, this support bracket tends to have low overall rigidity. Therefore, at the time of a vehicle collision, the fragile portion is immediately bent by the impact force, so that it is considered that damage to a pedestrian or the like due to the impact force is more reliably prevented. However, since the support bracket having the above structure tends to have low rigidity as described above, there is a possibility that the support rigidity of the vehicle component to the skeleton member of the vehicle body by the support bracket is insufficient during normal driving of the vehicle.

  On the other hand, in the thing of the said patent document 2, the intermediate part of the support bracket has made trough shape, and this bracket has a big rigidity in itself. For this reason, it is considered that the support rigidity of the vehicle component to the skeleton member of the vehicle body by the support bracket is sufficiently ensured during normal driving of the vehicle. However, in the support bracket having the above-described configuration, the left and right opening edges of the trough groove in the trough-shaped portion particularly counteract the impact force at the time of the collision with a large rigidity. For this reason, the fragile portion does not bend immediately due to the impact force, and therefore, there is a possibility that the impact force is delayed and the pedestrian or the like caused by the impact force cannot be sufficiently prevented from being damaged. is there.

  The present invention has been made paying attention to the above-described circumstances, and an object of the present invention is to ensure sufficient support rigidity of vehicle parts to a skeleton member of a vehicle body during normal traveling of the vehicle. In the event of a collision, the impact force on the vehicle parts is immediately relieved so that damage to pedestrians and vehicle parts due to the impact force can be prevented more reliably.

The invention according to claim 1 is provided with a resin support bracket 32 that extends from the vehicle component 24 and whose extension end portion 32 is fastened to the skeleton member 3 of the vehicle body 2 by a fastener 34. In the shock-absorbing structure at the time of vehicle collision, the middle part of the exit direction A is made into a trough shape, and a fragile part 46 that can be deformed by the impact force F to the vehicle component 24 at the time of the vehicle 1 collision is formed in the trough-shaped part 39.
The fragile portion 46 is formed at the opening edge of the trough groove 43 in the trough-shaped portion 39, and the bottom 41 of the trough-shaped portion 39 is formed so as to be separated from the extending end portion 33 in the axial direction of the fastener 34. The end face 48 of the bottom 41 of the trough-shaped portion 39 in the extending direction A is positioned in the vicinity of the skeleton member 3.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

  According to the first aspect of the present invention, as a precondition, a resin support bracket is provided which extends from a vehicle part and whose extension end is fastened to a skeleton member of a vehicle body by a fastener, and the extending direction of the support bracket is provided. A trough-shaped trough-shaped portion is formed in the middle, and a fragile portion that can be deformed by an impact force applied to the vehicle parts at the time of a vehicle collision is formed in the trough-shaped portion.

  That is, a trough-shaped portion is formed in the middle of the extending direction of the support bracket for supporting the vehicle component on the skeleton member of the vehicle body, and this trough-shaped portion has a large rigidity. For this reason, during normal traveling of the vehicle, the support rigidity of the vehicle component to the skeleton member of the vehicle body by the support bracket is sufficiently ensured regardless of the formation of the fragile portion in the trough-shaped portion.

  And in the said structure, the said weak part is formed in the opening edge part of the trough groove | channel in the said trough shape part, and the bottom part of the said trough shape part is formed so that it may leave | separate from the said extension end part in the axial direction of the said fastener. The end surface of the bottom portion of the trough-shaped portion in the extending direction is positioned in the vicinity of the skeleton member.

  Here, at the time of a vehicle collision, in particular, the opening edge portion of the trough groove in the trough-shaped portion tries to counter the impact force at the time of the collision with high rigidity. However, since the fragile portion is formed at the opening edge of the trough groove as described above, stress concentration due to the impact force immediately occurs in the fragile portion.

  Moreover, at the time of a vehicle collision, the support bracket moves relative to the skeleton member by the impact force regardless of the fastening end of the extended end portion of the support bracket to the skeleton member by the fastener due to the impact force to the vehicle parts. (When the end surface of the bottom portion of the trough-shaped portion is in contact with the skeleton member in advance, the relative movement is 0), and the end surface of the bottom portion of the trough-shaped portion of the support bracket is pressed against the skeleton member. To do. Then, the relative movement of the extended end portion side of the support bracket due to the impact force is immediately blocked, and accordingly, the stress concentration at the weak portion due to the impact force is rapidly increased, and the weak portion is bent. The impact force due to the collision is quickly relieved.

  Therefore, as described above, when the vehicle normally travels, the support rigidity of the vehicle parts to the skeleton member of the vehicle body is sufficiently ensured, but when the vehicle collides, the impact force is quickly relaxed, and this Damage to pedestrians and vehicle parts due to impact force is more reliably prevented.

  Moreover, the prevention of damage to pedestrians and vehicle parts due to the impact force at the time of the collision described above is a simple configuration in which a fragile portion is formed at the opening edge of the trough groove in the trough shape portion of the support bracket. Therefore, the prevention of the damage can be achieved with a simple structure at low cost.

FIG. 3 is a partially enlarged perspective view of FIG. 2. It is a perspective view of a vehicle body front part. (A) is side surface sectional drawing of a support bracket, (b) is an effect | action explanatory drawing in the figure corresponded to said (a). (A) is a sectional view taken along line IV-IV in FIG. 3 (a), and (b) is a view corresponding to the above (a), showing another embodiment.

  The present invention relates to a shock-absorbing structure at the time of a vehicle collision. When a vehicle normally travels, the support rigidity of the vehicle component to the skeleton member of the vehicle body is sufficiently ensured. As described above, in order to realize the purpose of more reliably preventing damage to pedestrians and vehicle parts due to the impact force, a mode for carrying out the present invention is as follows. It is.

  That is, the shock-absorbing structure at the time of a vehicle collision is provided with a resin support bracket that extends from a vehicle part and whose extension end is fastened to a skeleton member of the vehicle body by a fastener. A midway portion in the extending direction of the support bracket is formed into a trough shape, and a fragile portion that can be deformed by an impact force to the vehicle component at the time of a vehicle collision is formed in the trough shape portion. This weak part is formed in the opening edge part of the trough groove | channel in the said trough shape part. A bottom portion of the trough-shaped portion is formed so as to be separated from the extending end portion in the axial direction of the fastener. And the end surface in the said extension direction of the bottom part of the said trough shape part is located in the vicinity of the said skeleton member.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  1, 2, 3 (a), and 4 (a), reference numeral 1 in the figure is a vehicle exemplified by an automobile, and an arrow Fr indicates the front in the traveling direction of the vehicle 1. Moreover, the right and left mentioned below shall mean the width direction of the vehicle 1 toward the said front.

  The vehicle body 2 of the vehicle 1 includes a skeleton member (frame) 3 having high strength and rigidity, and a vehicle body (body) 4 that is supported by the skeleton member 3 and forms the outer surface of the vehicle body 2. Is supported on the running surface 6 by the front and rear wheels 5.

  The skeleton member 3 is made of sheet metal and constitutes left and right side portions of the vehicle body 2. The left and right front pillars 10 extend in the vertical direction, and the apron members project forward from the midway portions of the front pillars 10 in the vertical direction. 11, a pair of left and right side members 12 that are coupled to the lower part of each front pillar 10 and extend in the front-rear direction of the vehicle body 2, and a frame-shaped radiator support 13 that is supported by the front end portions of both side members 12. I have.

  The vehicle body 4 forms a pair of left and right sheet metal front fenders 17 that are formed on the left and right side surfaces of the front portion of the vehicle body 2 and supported by the apron member 11, and the front surface of the vehicle body 2. A front bumper 18 made of resin that is supported by the front end portion of the front hood, and a hood 20 that closes the engine room 19 surrounded by the upper edges of the front fenders 17 and the front bumper 18 so as to be openable and closable from above. The engine room 19 accommodates an engine (not shown) for driving the vehicle 1 and is supported by the skeleton member 3.

  A headlamp 25 as a vehicle component 24 is provided in a space 23 surrounded by the upper front edge of the front fender 17, the side upper edge of the front bumper 18, and the side front edge of the hood 20. . The headlamp 25 is a space surrounded by a lamp-shaped resin lamp housing 26 that opens forward, a lamp lens 27 that closes the opening of the lamp housing 26, and the lamp housing 26 and the lamp lens 27. And a bulb 28 that irradiates the front of the vehicle body 2.

  The headlamp 25 is supported by the vehicle body 2 as follows. That is, of the left and right side portions of the lamp housing 26 of the headlamp 25, the lower portion of the outer portion is supported by the lower front edge portion of the front fender 17 by the outer support bracket 30. The lower portion of the inner portion of the lamp housing 26 is supported by the radiator support 13 by an inner support bracket 31. The rear upper portion of the lamp housing 26 is supported by the apron member 11 by an upper support bracket 32. Each of the support brackets 30 to 32 is made of resin.

  The upper support bracket 32 integrally extends from the rear upper part of the lamp housing 26 toward the rear upper side, and the extended end 33 is fastened to the portion 11 a of the apron member 11 which is the skeleton member 3 of the vehicle body 2. 34 is fastened. The portion 11a and the extended end portion 33 of the apron member 11 are each formed in a plate shape and overlap each other. The fastener 34 is composed of a bolt and a nut that are screwed together, and its axis 35 extends in the thickness direction and in the vertical direction of the portion 11a of the apron member 11 and the extending end portion 33 of the support bracket 32. The apron member 11 passes through bolt holes 36 and 37 formed in the portion 11 a and the extended end portion 33.

  A middle portion of the support bracket 32 in the extending direction (longitudinal direction) A is a trough-shaped trough-shaped portion 39 that opens upward, and a cross-section of the trough-shaped portion 39 is V-shaped. . Specifically, the trough-shaped portion 39 includes left and right side walls 40, 40 that are separated from each other as they go upward, a bottom portion 41 formed by joining the lower ends of the side walls 40, 40, and the side walls 40. An end wall 42 that joins the ends of the bottom 41 in the extending direction A to each other is provided. Each of the side walls 40, the bottom portion 41, and each end wall 42 are integrally coupled to each other, and a space surrounded by these 40 to 42 is a trough groove 43. The base of the extended end 33 is integrally coupled to the outer surface of the end wall 42.

  In the midway portion of the trough-shaped portion 39 in the extending direction A, a fragile portion 46 is formed at the upper edge portion of each end wall 42 that is the opening edge portion of the trough groove 43. Each of these fragile portions 46 is a triangular cutout. When the vehicle 1 collides (front collision) with a pedestrian or the like in front of the vehicle 1, each of the fragile portions 46 can be deformed by an impact force F applied to the vehicle component 24 due to the collision.

  The bottom portion 41 of the trough-shaped portion 39 is separated from the extended end portion 33 in the axial direction along the axis 35 of the fastener 34 (in the thickness direction of the extended end portion 33 of the support bracket 32). Is formed. Further, the end surface 48 in the extending direction A of the bottom 41 of the trough-shaped portion 39 is positioned in the vicinity (including abutment) of the portion 11a of the apron member 11 in the extending direction A.

  According to the above configuration, the trough-shaped portion 39 is provided in the middle of the extending direction A of the support bracket 32 for supporting the vehicle component 24 on the skeleton member 3 of the vehicle body 2, and the trough-shaped portion 39 has a large rigidity. Is. For this reason, when the vehicle 1 normally travels, the support rigidity of the vehicle component 24 to the skeleton member 3 of the vehicle body 2 by the support bracket 32 is sufficiently ensured regardless of the formation of the fragile portion 46 in the trough-shaped portion 39. Is done.

  And in the said structure, the said weak part 46 is formed in the opening edge part of the trough groove | channel 43 in the said trough shape part 39, and the bottom part 41 of the said trough shape part 39 is the said extension end part in the axial direction of the said fastener 34 The end surface 48 in the extending direction A of the bottom 41 of the trough-shaped portion 39 is positioned in the vicinity of the skeleton member 3.

  Here, particularly when the vehicle 1 collides, the opening edge of the trough groove 43 in the trough-shaped portion 39 tries to counter the impact force F at the time of the collision with high rigidity. However, since the fragile portion 46 is formed at the opening edge of the trough groove 43 as described above, stress concentration due to the impact force F immediately occurs in the fragile portion 46.

  In addition, at the time of the collision of the vehicle 1, the support bracket 32 is affected by the impact force F on the vehicle component 24 regardless of the fastening of the extended end portion 33 of the support bracket 32 to the skeleton member 3 by the fastener 34. 3 is moved relative to the skeleton member 3 by the force F (when the end surface 48 of the bottom 41 of the trough-shaped portion 39 is in contact with the skeleton member 3 in advance, the relative movement is 0), and FIG. As shown in b), the end surface 48 of the bottom 41 of the trough-shaped portion 39 of the support bracket 32 is in pressure contact with the skeleton member 3. As a result, the relative movement of the support bracket 32 on the extended end 33 side due to the impact force F is immediately prevented, and the stress concentration at the weak portion 46 due to the impact force F is rapidly increased. 46 bends and the impact force F caused by the collision of the vehicle 1 is quickly alleviated.

  Therefore, as described above, when the vehicle 1 normally travels, the support rigidity of the vehicle component 24 to the skeleton member 3 of the vehicle body 2 is sufficiently secured, but when the vehicle 1 collides, the impact force F is quick. As a result, damage to the pedestrian and the vehicle component 24 due to the impact force F is more reliably prevented.

  Further, to prevent damage to the pedestrian and the vehicle component 24 due to the impact force F at the time of the collision described above, a fragile portion 46 is formed at the opening edge of the trough groove 43 in the trough-shaped portion 39 of the support bracket 32. Therefore, the prevention of the damage can be achieved at a low cost with a simple configuration.

  In FIG. 2, an engine air cleaner 49 that is a vehicle component 24 is supported by a plurality of support brackets 50 on a radiator support 13 that is a skeleton member 3 of the vehicle body 2. The same structure as the support bracket 32 is applied to each of the support brackets 50.

  The trough-shaped section 39 of the support bracket 32 may have a channel shape as shown in FIG. 4B or a U-shape. The shape is more easily bent by the impact force F.

  Moreover, although the above is based on the illustrated example, the portion of the skeleton member 3 (the apron member 11 and the radiator support 13) that supports the extended end portion 33 of the support bracket 32 may be made of resin. The support brackets 30 and 31 may have the same configuration as the support bracket 32. Further, the fragile portion 46 may be formed only on one side wall 40 of the trough-shaped portion 39 of the support bracket 32. The fragile portion 46 may be a U-shaped notch, a thin portion, or a small hole.

  In the illustrated example, the bottom 41 of the trough-shaped portion 39 is formed so as to be separated from the extending end 33 in the axial direction of the fastener 34 over the entire extending direction A of the trough-shaped portion 39. Only the bottom 41 at the end of the trough-shaped portion 39 on the extended end 33 side may be formed so as to be separated from the extended end 33 as described above.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Skeletal member 4 Car body body 11 Apron member 11a part 13 Radiator support 23 Space 24 Vehicle parts 25 Headlamp 32 Support bracket 33 Extension end part 34 Fastening tool 35 Shaft center 36 Bolt hole 37 Bolt hole 39 Trough shape part 40 side wall 41 bottom 42 end wall 43 trough groove 46 fragile part 48 end surface A extending direction F impact force

Claims (1)

A support bracket made of resin that extends from a vehicle part and whose extension end is fastened to a skeleton member of a vehicle body by a fastener is provided, and a midway portion in the extending direction of the support bracket is formed into a trough shape. In addition, in the shock absorbing structure at the time of the vehicle collision in which the fragile portion that can be deformed by the impact force to the vehicle parts at the time of the vehicle collision is formed,
The fragile portion is formed at the opening edge of the trough groove in the trough-shaped portion, and the bottom portion of the trough-shaped portion is formed so as to be separated from the extending end portion in the axial direction of the fastener. A shock absorbing structure at the time of a vehicle collision, wherein an end face of the bottom portion in the extending direction is positioned in the vicinity of the skeleton member.

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