JP3690232B2 - Satellite sensor mounting structure of airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a satellite sensor mounting structure for an airbag device, and more particularly to a satellite sensor mounting structure for an airbag device in which a satellite sensor is disposed at the front end of a vehicle body such as an automobile.
[0002]
[Prior art]
Japanese Patent Laid-Open No. 10-152014 discloses an example of a satellite sensor mounting structure for an airbag apparatus in which a satellite sensor is disposed at the front end of a vehicle body.
[0003]
As shown in FIG. 10, in the satellite sensor mounting structure of the airbag device, the satellite sensor 100 for changing the threshold value for determining whether or not to operate the airbag device is replaced with the left and right front sides of the vehicle 102. It is disposed at the front end of the member. For this reason, these satellite sensors 100 can detect a front collision including an offset collision at an early stage.
[0004]
[Problems to be solved by the invention]
However, in the satellite sensor mounting structure of such an airbag device, it is desirable to arrange the satellite sensor 100 as much as possible in the front part of the vehicle body, but the front part of the vehicle body is a light weight that does not require deployment of the airbag bag body. It is conceivable that damage will occur even during a collision. For this reason, it is conceivable that the connector of the satellite sensor 100 is broken or the wire harness is broken, and further, the satellite sensor main body is broken due to damage during a light collision.
[0005]
In consideration of the above facts, the present invention is a satellite sensor mounting structure for an air bag apparatus that can detect a collision stably at an early stage regardless of how the front part of the vehicle body is crushed and can prevent the satellite sensor from being damaged during a light collision. Is the purpose.
[0006]
[Means for Solving the Problems]
The satellite sensor mounting structure of the airbag device of the present invention according to claim 1 includes a vehicle body front structure in which a crash box having a lower resistance to an axial compression load than the front side member is connected to the front end of the front side member,
In a portion of the flange portion extending in a direction substantially perpendicular to the longitudinal direction of the crash box that is in the remaining crush area of the crash box, at a position where a distance that does not contact the outer peripheral surface of the crashed crash box is opened. A satellite sensor of the bag device is provided.
[0007]
Accordingly, the crash box connected to the front end of the front side member has a lower proof strength against the axial compression load than the front side member. At this time, the satellite sensor is located in the crush box remaining area, on the flange portion extending in a direction substantially perpendicular to the longitudinal direction of the crash box, at a distance that does not contact the outer peripheral surface of the crashed crash box. because it is arranged in, it is capable of stable collision detection early irrespective of the collapse how a front portion of a vehicle body, and can prevent damage to the satellite sensor at the time of a light collision. In addition, since the satellite sensor is attached to the front portion of the vehicle body after being attached to the flange portion of the crash box, the assembling property is improved.
[0010]
According to a second aspect of the present invention, in the satellite sensor mounting structure of the airbag device according to the first aspect, the vehicle body front structure includes a radiator support upper mounted on an upper portion of a cooling system component, and the cooling system component. And a radiator support side connected to the crash box and the front side member, and bumper reinforcement connected to the crash box.
[0011]
Therefore, in addition to the content described in claim 1, since the load acting on the front part of the vehicle body at the time of a light collision can be absorbed by the bumper reinforcement and the crash box, the bumper reinforcement which becomes a damaged part at the time of a light collision. And you only need to replace the crash box. As a result, damage reduction and repairability at the time of a light collision can be improved. Moreover, since the number of parts can be reduced, weight reduction and productivity can be improved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of a satellite sensor mounting structure for an airbag apparatus according to the present invention will be described with reference to FIGS.
[0013]
In the figure, the arrow FR indicates the vehicle body front direction, the arrow IN indicates the vehicle width inward direction, and the arrow UP indicates the vehicle body upward direction.
[0014]
As shown in FIG. 1, a front bumper reinforcement 10 made of an extruded aluminum material is disposed along the vehicle width direction at the front end of the front body of the vehicle body. Is a Japanese character. A cooling system component 12 such as an air conditioner condenser or a radiator is disposed on the rear side of the vehicle body of the front bumper reinforcement 10.
[0015]
As shown in FIG. 2, the cooling system component 12 is supported by a radiator support 14. The radiator support 14 includes three parts: a radiator support upper 16 attached to the upper part of the cooling system part 12, and left and right radiator support sides 18 and 20 attached to the side part of the cooling system part 12.
[0016]
The radiator support sides 18 and 20 are respectively formed with overhang portions 18A and 20A made of a plate material extending outward from the vehicle width. The lower portions of these overhang portions 18A and 20A are crush box mounting portions 18B, 20B.
[0017]
As shown in FIG. 3, the crash box attachment portion 18 </ b> B on the left side of the vehicle body has a flat plate shape and is attached to the plate 30 </ b> A disposed on the front surface of the front side member 30. The crash box mounting portion 20B on the right side of the vehicle body (not shown) has the same configuration.
[0018]
As shown in FIG. 2, left and right crash boxes 22, 24 arranged along the longitudinal direction of the vehicle body are attached to the crash box attaching portions 18 </ b> B, 20 </ b> B, respectively. The crash boxes 22 and 24 are formed by aluminum extrusion-molded portions 22A and 24A and rear end flange portions 22B and 24B, and the flange portions 22B and 24B sandwich the crash box mounting portions 18B and 20B. The front side member 30 is fixed to a plate 30A (see FIG. 3) by fixing members 26 such as bolts and nuts. Further, the front end portions 22C and 24C of the left and right crash boxes 22 and 24 are welded to the rear wall portion 10A of the front bumper reinforcement 10, respectively.
[0019]
As shown in FIG. 3, one of left and right satellite sensors 25 for determining a threshold value for operating the airbag device is disposed on the inner side portion 22D in the vehicle width direction of the flange portion 22B of the crash box 22. The satellite sensor 25 is attached to the flange portion 22B by a fixing member 27 such as a screw. A satellite sensor 25 is similarly attached to the crash box 24 on the right side of the vehicle body.
[0020]
As shown in FIG. 4, when a load (arrow F1 in FIG. 4) is applied to the front bumper reinforcement 10 from the front of the vehicle body, the crash box 22 is shown by a two-dot chain line in FIG. The shaft is compressed and deformed from the state shown to the state shown by the solid line. In other words, the yield strength of the crash box 22 against the axial compression load is lower than that of the front side member 30 against the axial compression load.
[0021]
Further, the remaining crushing margin L1 of the deformed crash box 22 shown by a solid line in FIG. 4 is larger than the vehicle front-rear direction dimension L2 of the cooling system component 12, and the rear wall portion 10A of the front bumper reinforcement 10 and the cooling system component 12 And the radiator support side 18 is set to a value that hardly interferes. The crash box 24 on the right side of the vehicle body, not shown, has the same configuration.
[0022]
The left and right satellite sensors 25 are respectively disposed in the remaining crush area of the crash box 22 on the inner side in the front-rear direction of the crush box L1, and the satellite sensors 25 are disposed on the outer peripheral surface 22E of the crash box 22. On the other hand, it is attached to the rear end flange portion 22B of the crash box 22 with a distance W (see FIG. 3) that does not contact the outer peripheral surface 22E when crushed. A satellite sensor 25 is similarly attached to the crash box 24 on the right side of the vehicle body (not shown).
[0023]
As shown in FIG. 1, lamp mounting portions 18C and 20C are formed on the upper portions of the overhang portions 18A and 20A in the left and right radiator support sides 18 and 20, respectively.
[0024]
As shown in FIG. 5, in the headlamp 36 as a lamp, an inner upper portion 36A in the vehicle width direction is fixed to a lamp mounting portion 20C on the right side of the vehicle body by a fixing member 38 such as a bolt. Further, the vehicle width direction outer side upper portion 36 </ b> B of the headlamp 36 is fixed to the front fender 44 by a fixing member 42 such as a bolt via a bracket 40.
[0025]
As indicated by a two-dot chain line in FIG. 6, the lamp mounting portion 20C is easily deformed toward the rear of the vehicle body when a load (arrow F2 in FIG. 6) acts on the headlamp 36 from the front of the vehicle body. It has become. Therefore, when a load (arrow F2 in FIG. 6) is applied to the headlamp 36 from substantially the front of the vehicle body, the lamp mounting portion 20C is deformed as indicated by a two-dot chain line, and the headlamp 36 is indicated by a two-dot chain line. Thus, the headlamp 36 can be prevented from being damaged.
[0026]
As shown in FIG. 7, the lower portion 36C of the headlamp 36 is attached to the rear flange 48A of the bumper cover 48 via the clip 46, and the engaging portion 46A formed on the clip 46 from the front side of the vehicle body The lamp 36 is locked to a pin 50 formed in the lower part 36C of the lamp 36.
[0027]
As shown in FIG. 8, the bottom portion 46B of the engaging portion 46A is wider than the neck portion 46C, and the neck portion 50A of the pin 50 is fitted to the bottom portion 46B. Therefore, when a load (arrow F3 in FIG. 8) is applied to the bumper cover 48 from substantially the front of the vehicle body, the neck 50A of the pin 50 comes out of the bottom 46B of the engaging portion 46A of the clip 46, and the bumper cover 48 and clip 46 Is moved substantially rearward (in the direction of arrow A in FIG. 8) so that the bumper cover 48 is detached from the lower portion 36C of the headlamp 36. The headlamp 36 on the left side of the vehicle body (not shown) has the same configuration.
[0028]
Next, the operation of this embodiment will be described.
[0029]
In the present embodiment, when a load is applied to the front bumper reinforcement 10 from the front of the vehicle body at the time of a collision, the left and right crash boxes 22 and 24 are moved ahead of the left and right front side members 30, for example, two points in FIG. The shaft is compressed and deformed from the state shown by the chain line to the state shown by the solid line, and the total length becomes about 1/3. At this time, since the left and right satellite sensors 25 are respectively disposed in the remaining crush areas of the left and right crash boxes 22 and 24, even if the crash boxes 22 and 24 are crushed, the connector of the satellite sensor 25 is broken or the wire harness is disconnected. Furthermore, the satellite sensor 25 main body is not damaged. As a result, regardless of how the front part of the vehicle body is crushed, the right and left satellite sensors 25 can detect collisions quickly and stably, and at the time of a light collision that does not require the airbag bag body to be deployed (for example, the vehicle speed is It is possible to prevent the satellite sensor 25 from being damaged during a collision of 15 km / h or less.
[0030]
In the present embodiment, the load acting on the front of the vehicle body during a light collision can be absorbed by the deformation of the bumper reinforcement 10 and the axial compression deformation of the crash boxes 22 and 24. Since it is only necessary to replace the bumper reinforcement 10 and the crash boxes 22 and 24, damage reduction and repairability at the time of a light collision can be improved.
[0031]
In the present embodiment, the satellite sensor 25 on the left side of the vehicle body is attached to the rear end flange portion 22B of the crash box 22 at a distance W (see FIG. 3) that does not contact the outer peripheral surface 22E of the crashed crash box 22. (The same applies to the satellite sensor 25 on the right side of the vehicle body), the contact between the outer peripheral surface of the crashed crash boxes 22 and 24 and the satellite sensor can be prevented. As a result, more stable detection is possible.
[0032]
Moreover, in this embodiment, after attaching the satellite sensor 25 to the rear end flange portions 22B and 24B of the left and right crash boxes 22 and 24, the satellite sensor 25 is assembled to the radiator support 14, so that the assembling property is improved.
[0033]
In the present embodiment, the remaining crushing margin L1 of the crash boxes 22 and 24 after deformation is larger than the vehicle front-rear direction dimension L2 of the cooling system component 12, and the rear wall portion 10A of the front bumper reinforcement 10 and the cooling system component 12 and the radiator support sides 18 and 20 are set to values that do not easily interfere with each other. As a result, the input load to the cooling system component 12 can be suppressed during a light collision, and damage to the cooling system component 12 can be prevented.
[0034]
In the present embodiment, the flat crush box mounting portions 18B and 20B are attached to the plate 30A disposed on the front surface of the front side member 30 so as to overlap the crush boxes 22 and 24 and the front. The connecting portions between the side members 30 are disposed on the front surfaces of the front side members 30 and the flange portions 22B and 24B of the crash box mounting portions 18B and 20B and the crash boxes 22 and 24 made of plate materials on the radiator support sides 18 and 20, respectively. Only the thickness of the plate 30A is sufficient. As a result, it is possible to completely axially deform the crash boxes 22 and 24 at the time of a light collision, and to completely axially deform the front portions of the crash boxes 22 and 24 and the side member 30 without being obstructed by the radiator support 14 at the time of a collision larger than the light collision. Therefore, impact energy can be absorbed efficiently.
[0035]
In the present embodiment, the crash boxes 22 and 24 are composed of aluminum extruded portions 22A and 24A and rear end flange portions 22B and 24B. Axial compression deformation becomes easy and impact energy can be absorbed efficiently.
[0036]
Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the above embodiment, the left and right satellite sensors 25 are disposed on the inner side portions 22D and 24D in the vehicle width direction of the flange portions 22B and 24B of the left and right crash boxes 22 and 24, respectively. You may arrange | position the sensor 25 in other parts, such as the vehicle body upper side part in the flange parts 22B and 24B of the left and right crush boxes 22 and 24. FIG. Further, in place of the flange portions 22B and 24B of the crash boxes 22 and 24, as shown in FIG. 9, a satellite sensor 25 is disposed on the crash box mounting portions 18B and 20B side of the left and right radiator support sides 18 and 20. It is also good.
[0037]
In the present embodiment, the front bumper reinforcement 10 and the crash boxes 22 and 24 are made of an extruded aluminum material, but other metals such as iron may be used instead of the extruded aluminum material. Further, the cross-sectional shapes of the front bumper reinforcement 10 and the crash boxes 22 and 24 are not limited to the above embodiment.
[0038]
【The invention's effect】
The satellite sensor mounting structure of the airbag device according to the first aspect of the present invention is capable of early and stable collision detection regardless of how the front part of the vehicle body is crushed, and damages the satellite sensor during a light collision. It has an excellent effect that it can be prevented. Moreover, it has the outstanding effect that an assembly | attachment property improves.
[0040]
In addition to the effect described in claim 1, the present invention described in claim 2 can absorb the load applied to the front end module acting on the front of the vehicle body during a light collision by the bumper reinforcement and the crash box. Therefore, it has the excellent effect that the damage reduction property and repairability at the time of a light collision can be improved, and the weight reduction and productivity can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a satellite sensor mounting structure of an airbag device according to an embodiment of the present invention, as seen from the front side of a vehicle.
FIG. 2 is an exploded perspective view showing the satellite sensor mounting structure of the airbag device according to the embodiment of the present invention, as viewed from the obliquely forward side of the vehicle.
FIG. 3 is an enlarged cross-sectional view taken along line 3-3 in FIG.
4 is a cross-sectional view corresponding to FIG. 3 showing a deformed state in the satellite sensor mounting structure of the airbag apparatus according to the embodiment of the present invention.
FIG. 5 is a perspective view showing the lamp mounting portion on the right side of the vehicle body in the satellite sensor mounting structure of the airbag device according to the embodiment of the present invention, as seen from the front side of the vehicle.
FIG. 6 is a plan view showing a lamp attachment portion on the right side of the vehicle body in the satellite sensor attachment structure of the airbag device according to the embodiment of the present invention.
7 is an enlarged cross-sectional view taken along line 7-7 in FIG.
8 is an enlarged cross-sectional view taken along line 8-8 in FIG.
FIG. 9 is an enlarged cross-sectional view corresponding to FIG. 3 in a satellite sensor mounting structure of an airbag device according to another embodiment of the present invention.
FIG. 10 is a perspective view showing a satellite sensor mounting structure of a conventional airbag device as seen from the oblique front of the vehicle.
[Explanation of symbols]
10 Front bumper reinforcement 14 Radiator support 16 Radiator support upper 18 Radiator support side 18A Radiator support side overhanging portion 18B Radiator support side crash box mounting portion 20 Radiator support side 20A Radiator support side overhanging portion 20B Radiator support side crash box Mounting portion 22 Crash box 22B Crash box flange 24 Crash box 24B Crash box flange 25 Satellite sensor 30 Front side member

Claims (2)

A vehicle body front structure in which a crash box having a lower resistance to an axial compression load than the front side member is connected to the front end of the front side member,
In a portion of the flange portion extending in a direction substantially perpendicular to the longitudinal direction of the crash box that is in the remaining crush area of the crash box, at a position where a distance that does not contact the outer peripheral surface of the crashed crash box is opened. A satellite sensor mounting structure for an airbag device, wherein a satellite sensor for the bag device is provided. The vehicle body front structure includes a radiator support upper attached to an upper part of a cooling system part, a radiator support side attached to a side part of the cooling system part and connected to the crash box and the front side member, and the crash The satellite sensor mounting structure for an airbag apparatus according to claim 1 , further comprising bumper reinforcement connected to the box .

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