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Vehicle body transformable front section structure

a front section and vehicle technology, applied in the direction of vehicle components, vehicular safety arrangments, bumpers, etc., can solve the problems of crash box deformation that cannot be stably absorbed, crash box deformation could occur before the strength of the crash box, crash box deformation could be insufficient to absorb collision load, etc., to achieve excellent advantageous effect of enabling collision load, excellent advantageous effect of enabling pressure, and stably absorbed

Active Publication Date: 2017-07-13
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This configuration enables stable absorption of collision loads of varying magnitudes by lengthening the crushing stroke and preventing crease lines, ensuring effective energy absorption and maintaining structural integrity during frontal collisions.

Problems solved by technology

However, in the case of the related art described in JP-A No. 2009-067066, since the high pressure gas is supplied into the internal space of the crash box following input of the collision load to the vehicle, it is conceivable that deformation could occur before the strength of the crash box has been completely raised by the high pressure gas.
Moreover, even if the acceleration detected by the acceleration sensor is a value close to the threshold value, so long as the detected acceleration is smaller than the threshold value, the gas generator will not actuate, and so it is conceivable that the amount of deformation in the crash box could be insufficient to absorb the collision load.
However, it is conceivable that if collision load from the vehicle front side were to be input in a state in which the crash box has not extended to a sufficiently complete state, namely, a state in which crease lines remained, the crash box could fold and deform along the alternately provided mountain portions and valley portions, and sufficient energy absorption performance could become unobtainable.
Namely, even when a crash box is configured capable of extending in the vehicle front-rear direction, an issue remains regarding the point of suppressing crease lines from remaining, and stably absorbing collision load, in a state in which the crash box has extended.
As a result, when the collision load from the vehicle front side is large, the crush amount of the tube shaped section of the crash box is large, and when the collision load is small, the crush amount is small.

Method used

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  • Vehicle body transformable front section structure
  • Vehicle body transformable front section structure
  • Vehicle body transformable front section structure

Examples

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first exemplary embodiment

Modified Example of First Exemplary Embodiment

[0055]Next, explanation follows regarding a modified example of the first exemplary embodiment, with reference to FIG. 5. In the modified example, each bead portion 52 is formed in a substantially V-shape that is open toward the inner face 48 side of the shock absorbing section 18A and that has a longer edge toward the mountain portion 36 side, as viewed in cross-section from a direction orthogonal to the extension direction of the mountain portions 36 and the valley portions 38. The recesses 50 configuring part of the bead portions 52 are each configured including a parallel plane portion 54 that is formed parallel to a straight line L joining the apex of the respective mountain portion 36 and the apex of the respective valley portion 38, as viewed in cross-section from a direction orthogonal to the extension direction of the mountain portions 36 and the valley portions 38.

[0056]More specifically, the parallel plane portion 54 configure...

second exemplary embodiment

[0059]Next, explanation follows regarding a vehicle body transformable front section structure according to a second exemplary embodiment of the present disclosure, with reference to FIG. 6 to FIG. 8. Note that configuration portions similar to those of the first exemplary embodiment described above are appended with the same reference numerals, and explanation thereof is omitted.

[0060]In the present exemplary embodiment, a crash box 60 has the same basic configuration as the crash box 18 described above; however, first wall portions 62 and second wall portions 64 configuring a shock absorbing section 60A serving as a tube shaped section are configured by isosceles triangle shapes. More specifically, one first wall portion 62 and one second wall portion 64 make a set, and base edges of the two wall portions configuring each set are contiguous to each other and respectively disposed on either side of an inner fold portion 66 that is folded into a protrusion projecting toward the insi...

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PUM

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Abstract

A vehicle body transformable front section structure including: a front side member; a crash box that is configured including a tube shaped section having mountain portions and valley portions provided alternately along the vehicle front-rear direction and capable of extending in the vehicle front-rear direction, and that is attached to an end portion at a vehicle front side of the front side member; bumper reinforcement; a collision prediction section; and a gas generator; the tube shaped section being configured including a first wall portion and a second wall portion respectively disposed connected to each other in the vehicle front-rear direction through each of the mountain portions; and a recess being formed on an inner face side of the tube shaped portion in at least one out of the first wall portion or the second wall portion so as to enlarge the surface area of the inner face.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2016-003903 filed on Jan. 12, 2016, the disclosure of which is incorporated by reference herein.BACKGROUND[0002]Technical Field[0003]The present disclosure relates to a vehicle body transformable front section structure.[0004]Related Art[0005]Japanese Patent Application Laid-Open (JP-A) No. 2009-067066 describes an disclosure relating to a shock absorbing device. The shock absorbing device is provided with a gas generator that is housed in an internal space of a crash box, and configuration is made in which the gas generator is actuated when an acceleration sensor installed to the vehicle has detected an acceleration of a threshold value or greater. Thus, when collision load from a vehicle front side is input, in cases in which the acceleration sensor has detected acceleration of the threshold value or greater, high pressure gas generated...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60R19/20B60R19/34B60R19/48
CPCB60R19/205B60R19/34B60R19/483
Inventor OHMURA, YUKITO
Owner TOYOTA JIDOSHA KK