JP5013914B2 - Automobile hood shock absorption structure - Google Patents

Description

  The present invention relates to a hood impact absorbing structure for an automobile in which an impact force to a collision object is absorbed by rotating a rear end portion upward around a front end portion of a hood at the time of a vehicle collision.

  For example, there is a structure shown in FIG. 9 as an automobile hood impact absorbing structure that absorbs an impact force to a collision object at the time of a vehicle collision. This is an engagement portion between an upward U-shaped striker 31 having a rod portion 31 a that is fixed to the front end portion 30 a of the hood 30 and extends in the vehicle front-rear direction, and a lock member 33 that is fixed to the vehicle body 32 in the event of a vehicle collision. By hopping up the rear end 30b of the hood 30 around the center, the impact force on the collision object is absorbed. Here, the rod portion 31 a is provided with play in the front-rear direction in order to absorb the assembly error of the hood 30.

  By the way, when the rear end portion 30b of the hood 30 is hopped up, the hood 30 may move forward by t by the play in the front-rear direction of the rod portion 31a. As a result, there is a concern that the gap between the rear edge of the hood 30 and the cowl louver 34 and the windshield 35 is increased, and the range of absorption of the impact force to the collision object is reduced. Further, when the hood 30 collides with the hood 30 and the hood 30 moves further forward, the holding force of the hood 30 on the collision object may be weakened.

Therefore, in order to prevent the hood from moving forward in the event of a vehicle collision, for example, in Patent Document 1, a lower hinge fixed to the vehicle body and an upper hinge fixed to the hood are connected by a hinge arm and a support arm. However, a structure using an articulated link mechanism that restricts the forward movement of the hood by the support arm has been proposed.
Special table 2006-518305

  By the way, when the forward movement of the hood is prevented by the conventional articulated link mechanism, there is a problem that the structure tends to be complicated and the number of parts increases.

  The present invention has been made in view of the above-described conventional situation, and it is an object of the present invention to provide an automobile hood shock absorbing structure that can regulate forward movement of a hood at the time of a vehicle collision with a simple structure and a small number of parts. .

A hood that opens and closes an engine room or a trunk room formed on the vehicle body, a striker that is disposed between the front end portion of the hood and the vehicle body, and that has a rod portion extending in the vehicle front-rear direction, and is detachable from the rod portion. A hood locking device that locks the front end of the hood to the vehicle body with a lock member, and the hood is moved upward with the rear end of the hood centered on the engagement portion between the rod and the lock member in the event of a vehicle collision. The vehicle hood shock absorbing structure is configured to absorb the impact force on the collision object by rotating the hood to the front of the hood when the hood is rotated upward during a vehicle collision. the stopper member for restricting the movement is fixed to the rod portion, the stopper member is in the rod portion and the other body, and is characterized in that it is formed so as to surround the outer periphery of the rod portion That.

  According to a second aspect of the present invention, in the first aspect, the stopper member is configured to be compressible and deformable in the front-rear direction by a load acting on the hood at the time of a vehicle collision.

  According to the hood shock absorbing structure of the present invention, the stopper member that restricts the forward movement of the hood is provided on the rod portion of the striker, so that the hood can be prevented from moving forward in the event of a vehicle collision. Thereby, the impact force absorption range of the hood can be secured, and the impact force when the collided object falls on the hood can be reliably absorbed.

  In addition, since the rod portion is simply provided with a stopper member, the hood can be prevented from moving forward with a simple structure and a small number of parts compared to the case where a conventional articulated link mechanism is employed.

  In the invention of claim 2, since the stopper member is configured to be compressible and deformable in the front-rear direction, the impact force when the colliding object collides with the hood can be absorbed by the stopper member compressing and deforming. The impact force absorbing performance can be enhanced.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 8 are views for explaining an automobile hood shock absorbing structure according to an embodiment of the present invention. FIG. 1 is a sectional side view of the hood (a sectional view taken along line II in FIG. 8), and FIG. 3 is a side view of the stopper member provided on the striker of the hood, FIG. 3 is a cross-sectional view of the stopper member (a cross-sectional view taken along line IIIa-IIIa in FIG. 2, and a cross-sectional view taken along line IIIb-IIIb), and FIGS. FIG. 6 and FIG. 7 are configuration diagrams of the above-mentioned flip-up mechanism, and FIG. 8 is a perspective view of an automobile provided with the above hood. In the description of the present embodiment, front and rear and left and right mean front and rear and left and right when viewed in a seated state.

  In the figure, reference numeral 1 denotes a vehicle body, and the vehicle body 1 is defined by a dash panel 2 into an engine room A at a vehicle body front portion 1a and a vehicle room B at a vehicle body rear portion 1b.

  The engine room A includes the dash panel 2, a cowl panel 3 disposed in the upper edge of the dash panel 2 and extending in the vehicle width direction, and a radiator extending in the vehicle width direction disposed in front of the cowl panel 3. It is formed by a space surrounded by the support 4 and front fenders 5 and 5 arranged on the left and right sides. The cowl panel 3 supports the lower edge 6a of the windshield 6 that covers the front of the passenger compartment B.

  A resin-made cowl louver 7 extending in the vehicle width direction is disposed on the upper surface of the cowl panel 3 so as to cover the cowl panel 3. The front edge 7 a of the cowl louver 7 is fixed to the front edge 3 a of the cowl panel 3, and the rear edge 7 b is fixed to the lower edge 6 a of the windshield 6. A seal member 8 that seals between the cowl louver 7 and the hood 10 described below is attached to the front edge portion 7a.

  The hood 10 that opens and closes the upper portion of the engine room A is disposed in the vehicle body front portion 1a. The hood 10 has a structure in which outer edge portions of the outer panel 11 and the inner panel 12 are coupled to each other.

  A hood locking device 14 for locking the hood 10 to the radiator support 4 constituting the vehicle body front portion 1a is disposed at the center in the vehicle width direction of the front end portion 10a of the hood 10, and left and right side portions of the rear end portion 10b. Are provided with hinge mechanisms 15 and 15 for rotatably supporting the hood 10 between a fully open position C and a fully closed position D (see FIGS. 4 and 5).

  The left and right hinge mechanisms 15 include a hinge pin 17 having a hinge portion 10c fixed to the rear left and right sides of the hood 10 so as to extend rearward and a hinge arm 16 supported to extend forward of the vehicle body front portion 1a. Thus, the hood 10 is rotatably supported between the fully open position C and the fully closed position D around the hinge pin 17.

  The hood 10 includes an impact force absorbing device that absorbs an impact force when an impacted object falls down and falls onto the hood 10 at the time of a vehicle front collision.

  The impact force absorbing device includes a flip-up mechanism 21 for flipping up the rear end portion 10b of the hood 10 so as to rotate upward about an engaging portion of a hood lock device 14 (to be described later) of the hood 10, and a front bumper. 19 includes an impact force detection sensor 20 (see FIG. 8) and a controller (not shown) that activates the flip-up mechanism 21 when the impact force from the sensor 20 exceeds a predetermined value.

  The flip-up mechanism 21 is integrally assembled with the left and right hinge mechanisms 15, and an engagement / disengagement member 22 that removably supports the rear end of the hinge arm 16, and one end thereof is the hinge. A link 24 connected to a bracket 23 fixed to the longitudinal direction of the arm 16 and having the other end fixed to the vehicle body front portion 1a, and interposed between the link 24 and the vehicle body front portion 1a, And a coil spring 25 that urges the hood 10 in the flip-up direction.

  As shown in FIGS. 6 and 7, the engaging / disengaging member 22 is engaged with a spherical locking portion 26 fixed to the rear end portion of the hinge arm 16, and the locking portion 26 is detachably engaged. An engagement portion 27 having a curved groove 27a formed thereon, and a drive motor 28 that rotates the engagement portion 27 90 degrees between an engagement position and an engagement release position. The motor 28 is fixed to the vehicle body front portion 1a.

  During normal use, the locking portion 26 of the hinge arm 16 is engaged with the groove 27a of the engaging portion 27, so that the hood 10 can be opened and closed around the hinge pin 17 (see FIG. 4). .

  When the vehicle body front portion 1a collides with an object to be collided, the driving motor 28 rotates the engaging portion 27 90 degrees clockwise by the impact force (see FIG. 7B). Then, the locking portion 26 of the hinge arm 16 is disengaged from the engaging portion 27, and accordingly, the hinge arm 16 rises upward via the link 24 by the coil spring 25, and the rear end portion 10b of the hood 10 jumps up (see FIG. 5).

  The hood lock device 14 includes a striker 30 attached to the inner panel 12 of the hood 10 and a lock member 31 attached to the radiator support 4 and detachable from the striker 30. The lock member 31 releases the lock with the striker 30 by operating a lock release member (not shown) provided in the driver's seat.

  The striker 30 is made of an upward U-shaped pipe having a rod portion 30a extending in the longitudinal direction of the vehicle, and front and rear standing portions 30b and 30c extending forward and bent from the front and rear edges of the rod portion 30a. The front and rear upright portions 30 b and 30 c are fixed to the inner panel 12.

  A stopper member 33 is disposed on the rod portion 30a of the striker 30 to restrict the forward movement of the hood 10 when the rear end portion 10b of the hood 10 jumps up during a vehicle collision.

  As shown in FIGS. 2 and 3, the stopper member 33 is disposed on the rear side of the lock member 31 of the rod portion 30a and extends in the front-rear direction so as to surround the outer periphery of the rod portion 30a. 33a, and upper and lower mounting portions 33b and 33c projecting upward and downward from the rear end portion of the cylindrical portion 33a. The stopper member 33 is fixed to the rod portion 30a by tightening the fixing screws 34, 34 inserted into the upper and lower mounting portions 33b, 33c.

  The front end surface of the cylindrical portion 33a faces the lock member 31 with a slight gap.

  Further, the rear end portion 33d of the cylindrical portion 33a extends to a boundary bent portion between the rod portion 30a and the rear standing portion 30c, thereby preventing the stopper member 33 from moving backward.

  A bellows-like uneven portion 33e is formed in the cylindrical portion 33a at intervals in the front-rear direction. As a result, the stopper member 33 is compressed and deformed between the lock member 31 and the rear upright portion 30c by a load from an impacted object acting on the hood 10 at the time of a vehicle collision.

  The stopper member 33 is divided into left and right stopper halves 35 and 36 that are symmetric to the left and right. Stepped portions 35a and 35a are formed on the upper and lower edge portions of the left stopper half 35, and the upper and lower edge portions 36a and 36a are formed on the upper and lower stepped portions 35a. Are overlapped without any gap (see FIG. 3B).

  When the hood 10 jumps up around the engaging portion between the rod portion 30a and the lock member 31 at the time of a vehicle front collision, the stopper member 33 comes into contact with the lock member 31 and restricts the forward movement of the hood 10. Thereby, the collision range in which the colliding object falls on the hood 10 is maintained. In this case, when the object to be collided falls to the hood 10 and a load acts on the hood 10 due to the fall, the stopper member 33 is compressed and deformed in the axial direction between the lock member 31 and the rear standing portion 30c of the striker 30. Thereby, the impact energy of the colliding object is absorbed and absorbed.

  As described above, according to this embodiment, the rod member 30a of the striker 30 fixed to the front end portion 10a of the hood 10 is provided with the stopper member 33 that restricts the forward movement of the hood 10. Even if the rear end portion 10b of the hood 10 jumps up, the hood 10 does not move forward. Thereby, the impact force absorption range of the hood 10 can be ensured, and the impact force when the collision object falls on the hood 10 can be absorbed.

  Since only a structure in which a sheet metal stopper member 33 is provided on the rear side of the lock member 31 of the rod portion 30a is required, the structure is simpler and the number of components is smaller than when a conventional articulated link mechanism is employed. The forward movement of the hood 10 can be prevented.

  Further, by appropriately setting the plate thickness, size, and the like of the sputter member 33, it is possible to adjust the set value for the impact load, and it is possible to easily form a stopper member corresponding to the vehicle type.

  In the present embodiment, the bellows-like uneven portion 33e is formed on the stopper member 33, and the stopper member 33 can be compressed and deformed in the front-rear direction. Therefore, the impact force when the collision object collides with the hood 10 is stopped. The member 33 can be absorbed by compressive deformation, and the impact force absorbing performance of the hood 10 can be enhanced.

  In the above-described embodiment, the striker 30 is disposed on the hood 10 and the lock member 31 is disposed on the vehicle body 1. However, the present invention conversely includes the case where the striker is disposed on the vehicle body and the lock member is disposed on the hood. Is also applicable. In this case, the stopper member is disposed on the front side of the lock member of the rod portion.

  In the above embodiment, the stopper member is made of sheet metal. However, the stopper member of the present invention may be made of resin, and may be combined with a foamed product of hard urethane or resin as an impact absorber. . Furthermore, the stopper member may be joined to the striker by welding.

FIG. 9 is a cross-sectional side view (cross-sectional view taken along the line I-I in FIG. 8) of the hood for explaining the automobile hood shock absorbing structure according to the embodiment of the present invention. It is a side view of the stopper member provided in the striker of the said hood. It is sectional drawing of the said stopper member. It is a block diagram of the hinge mechanism of the said hood. It is a block diagram of the said hood flip-up mechanism. It is a block diagram of the said raising mechanism. It is a block diagram of the said raising mechanism. It is a perspective view of the motor vehicle by which the said food | hood was arrange | positioned. It is sectional drawing of the hood for demonstrating the formation process of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle body 10 Hood 10a Front end part 10b Rear end part 14 Hood lock device 30 Strike 30a Rod part 31 Lock member 33 Stopper member A Engine room

Claims (2)

A hood that opens and closes an engine room or a trunk room formed on the vehicle body, a striker that is disposed between the front end portion of the hood and the vehicle body, and that has a rod portion extending in the vehicle front-rear direction, and is detachable from the rod portion. A hood locking device that locks the front end of the hood to the vehicle body with a lock member, and the hood is moved upward with the rear end of the hood centered on the engagement portion between the rod and the lock member in the event of a vehicle collision. A hood shock absorbing structure for automobiles that absorbs the impact force on the impacted object by rotating the
At the time of a vehicle collision, when the hood is rotated upward, a stopper member for restricting the forward movement of the hood is fixed to the rod portion .
The automobile hood impact absorbing structure , wherein the stopper member is formed separately from the rod portion and so as to surround an outer peripheral portion of the rod portion . The automobile hood impact absorbing structure according to claim 1, wherein the stopper member is configured to be compressible and deformable in the front-rear direction by a load acting on the hood at the time of a vehicle collision.

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