JP2014065402A - Front part structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front part structure of a vehicle which reduces an injury value of a knee part of a driver without complicating the structure, increasing the costs and the weight, and deteriorating the productivity.SOLUTION: A brake booster 10 is positioned at the vehicle front side of a bracket 12a of an impact absorbing member 12 in a vehicle plane view. An inclined surface 12a', which further inclines to the vehicle width direction inner side toward its vehicle rear side portion, is formed at the vehicle front surface side of the bracket 12a. When the brake booster 10 is displaced to the vehicle rear side during a vehicle front collision, the inclined surface 12a' guides the brake booster 10 in an a direction that moves away from a knee part.

Description

  In the present invention, a brake booster (master cylinder) is disposed on the vehicle interior side of a front panel (panel member), and an impact absorbing member is disposed via a bracket so as to face a driver's knee. Regarding the part structure.

  In the front structure of the automobile, when the vehicle collides forward, the brake booster is displaced rearward and secondarily collides with the driver's knee, which may increase the injury value of the driver.

As a conventional technique capable of preventing an increase in the injury value due to such a secondary collision, a crash gap at the time of a vehicle front collision is provided behind a cross member extending in the vehicle width direction, and a brake booster is provided behind the vehicle through the gap. There is a structure in which is disposed (see, for example, Patent Document 1).

Further, as another conventional structure, there is a structure in which an impact absorbing member is disposed via a bracket on a vehicle body member extending in the vehicle width direction, and a core directed in the driver seat direction is provided in the impact absorbing member. Yes (see, for example, Patent Document 2).

JP 2000-135987 A JP 2007-269096 A

  In the conventional structures described in Patent Documents 1 and 2, although an increase in injury value due to a secondary collision with the driver can be avoided, the structure is complicated, the weight and cost increase, and the productivity deteriorates. There is.

  Further, the conventional structure of Patent Document 2 has a problem that it is difficult to control the buckling characteristics of the shock absorbing member unless the rigidity of the bracket for attaching the shock absorbing member to the vehicle body member is sufficiently secured.

  The present invention has been made in view of the above-described conventional circumstances, and is used in front of an automobile capable of reducing the injury value of a driver's knee without causing complicated structure, cost, weight increase, and productivity deterioration. The problem is to provide a partial structure.

According to the first aspect of the present invention, a brake booster is disposed on the vehicle interior side of the front panel member that forms the front surface of the vehicle interior, and an impact absorbing member is attached to the vehicle interior member facing the passenger's knee through a bracket. In the front structure of the car
The brake booster is positioned on the vehicle front side of the bracket in a plan view of the vehicle, and on the vehicle front side of the bracket, there is an inclined surface that is inclined so that the rear portion of the vehicle is positioned on the inner side or the outer side in the vehicle width direction. The inclined surface guides the brake booster away from the knee when the brake booster is displaced rearward at the time of a vehicle front collision.

According to a second aspect of the present invention, in the vehicle front structure according to the first aspect,
The shock absorbing member is displaced in the knee direction when the brake booster comes into contact with the inclined surface due to the vehicle rearward displacement.

  According to the front structure of the automobile of the first aspect of the present invention, the brake booster is positioned on the vehicle front side of the bracket of the shock absorbing member, and the inclined surface is formed on the vehicle front side of the bracket. Therefore, when the brake booster is displaced rearward during a vehicle front collision, the brake booster is guided by the inclined surface in a direction away from the driver's knee. Thereby, even if the brake booster is displaced rearward, it is possible to avoid a secondary collision directly with the driver's knee, and the injury value to the driver's knee can be reduced.

  Further, since the knee portion is guided in the direction away from the displacement direction of the brake booster by the vehicle rear portion of the inclined surface of the bracket, the direct secondary collision can be avoided also from this point, and the injury value is reduced. it can.

Since the inclined surface of the mounting bracket of the shock absorbing member has sufficient rigidity to guide the brake booster, it is easy to control the buckling characteristics of the shock absorbing member located behind the inclined surface, It is effective in reducing the injury value of the driver's knee.

Since the above-described effects can be realized by using a conventionally provided impact absorbing member, problems such as a complicated structure, an increase in weight and cost, and a deterioration in productivity can be avoided.

According to the invention of claim 2, at the initial contact of the brake booster with the inclined surface, the shock absorbing member is displaced toward the knee portion to restrain the knee portion, and at the same time, the brake booster is Move away from the camera. As described above, since the driver's knee is restrained by the shock absorbing member at the initial stage of the collision, the movement of the driver's body can be easily controlled, and the injury value can be further reduced.

1 is a perspective view schematically showing a front structure of an automobile according to Embodiment 1 of the present invention. It is a side view which shows the said front part structure typically. It is a top view which shows the said front part structure typically. It is a side view which shows the said front part structure typically. It is a top view which shows typically the front part structure of the motor vehicle based on Example 2 of this invention. It is a top view which shows typically the front part structure of the motor vehicle based on Example 3 of this invention.

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

  1 to 4 are views for explaining a front structure of an automobile according to Embodiment 1 of the present invention.

  In the figure, reference numeral 1 denotes a cabin of a cab-over type automobile according to Embodiment 1 of the present invention. The vehicle compartment 1 includes a floor panel 2 forming a bottom surface thereof, a front panel (front panel member) forming a front surface 3, a pillar inner panel 4 forming a side surface, a back panel and a roof panel (not shown) forming a back surface, Consists of doors. Reference numeral 3b denotes a front bumper disposed at the lower portion of the front panel 3.

  An instrument panel (hereinafter referred to as instrument panel) 3 a is disposed behind the front panel 3. A rectangular cylindrical cross member 5 extending in the vehicle width direction is disposed in a space surrounded by the front panel 3 and the instrument panel 3a. The left and right ends of the cross member 5 are the left and right pillars. Connected to the inner panels 4 and 4. Further, a cylindrical PP member 6 that also extends in the vehicle width direction is disposed behind the cross member 5, and the left and right end portions of the PP member 6 are the left and right pillar harness inner panels 4, 4. 4 is connected.

A steering wheel 7 is disposed in the vehicle compartment 2, and a steering shaft 8 connecting the wheel 7 and a steering gear (not shown) extends obliquely toward the floor panel 2 through the lower side of the PP member 6. . The steering shaft 8 is suspended and fixed to the PP member 6 via a bracket (not shown).

The cross member 5 is formed by connecting a front member 5a and a back member 5b so as to form a cylindrical shape. A brake bracket 9 is disposed in front of the driver seat of the cross member 5. The brake bracket 9 is made of sheet metal and has a bifurcated shape. The upper end flange 9a is fixed to the back member 5b of the cross member 5 by bolting or the like, and the lower end flange 9b is fixed to the front panel 3 by bolting or the like. Has been.

A brake booster 10 is attached to the rear upper portion of the brake bracket 9, and a brake arm 11 is rotatably supported by a rotation pin 11 a in the middle. The brake arm 11 has a pedal 11b at the lower end, and is connected to the piston rod 10a of the brake booster 10 by a brake lever 11c that rotates together with the brake arm 11. Thereby, when the brake pedal 11b is depressed, the brake booster 10 amplifies the hydraulic pressure.

  An impact absorbing member (knee bolster) 12 is disposed behind the brake booster 10 in the vehicle. The shock absorbing member 12 is fixed to the PP member 6 via a bracket 12a. The shock absorbing member 12 has a shape obtained by obliquely cutting a rectangular parallelepiped along a substantially diagonal line, and the rear end surface 12c faces the right knee Ma of the driver M.

  Here, the shock absorbing member 12 includes a member made of an elastic body such as rubber or foam, or a member made of sheet metal configured to buckle when a predetermined load is applied.

The bracket 12a is made of a flat plate material, and constitutes an inclined surface 12a ′ that is inclined so as to be located on the inner side in the vehicle width direction on the rear edge side.

Reference numeral 13 denotes an impact absorbing member (knee bolster) for the left knee Mb of the driver M, which is fixed to the PP member 6 via a bracket 13a. The bracket 13a includes a support plate 13c to which the shock absorbing member 13 is fixed, and a leg portion 13d for fixing the support plate 13c to the PP member 6 by welding. The rear end surface 13e of the shock absorbing member 13 faces the left knee Mb of the driver M.

In the front structure of the automobile according to the present embodiment, the brake booster 10 is positioned on the vehicle front side of the bracket 12a to which the shock absorbing member 12 is fixed, and the front surface of the bracket 12a is the inclined surface 12a ′. When the brake booster 10 is displaced rearward at the time of a vehicle front collision, the brake booster 10 is guided in the direction a away from the knee portion Ma of the driver M by the inclined surface 12a ′. Thereby, even if the brake booster 10 is displaced rearward, it is possible to avoid a secondary collision directly with the knee portion Ma of the driver M, and the injury value to the knee portion Ma of the driver M can be reduced.

Further, since the bracket 12a is inclined and disposed, the rear portion of the inclined surface 12a 'causes the right knee Ma of the driver vehicle M to be connected to the brake booster when the brake booster 10 contacts the inclined surface 12a' of the bracket 12a. Guided in the b direction away from the displacement direction of 10 (see the right knee Ma ′ in FIG. 3), the direct secondary collision can be avoided also from this point, and the injury value can be further reduced.

Further, the inclined surface 12a 'of the mounting bracket 12a of the shock absorbing member 12 is rigid enough to guide the brake booster 10, so that the shock absorbing member is located behind the inclined surface 12a'. The 12 buckling characteristics can be easily controlled, and it is effective for reducing the injury value of the driver's knee.

Since the above-described effects can be realized with a simple configuration in which the bracket 12a of the shock absorbing member 12 provided conventionally is inclined with respect to the brake booster 10, the structure is complicated, the number of parts, and the cost are reduced. Will not increase.

  FIG. 5 is a diagram for explaining a second embodiment of the present invention, in which the same reference numerals as those in FIG. 3 denote the same or corresponding parts.

  In the second embodiment, at the initial contact of the brake booster 10 with the inclined surface 12a ′ due to vehicle rearward displacement, the shock absorbing member 12 is configured to be displaced in the c direction toward the knee Ma. Yes.

  In the second embodiment, the shock absorbing member 12 is displaced in the c direction toward the knee portion Ma at the initial contact of the brake booster 10 with the inclined surface 12a ′, and restrains the knee portion Ma simultaneously. The brake booster 10 moves in the direction a away from the knee Ma.

As described above, the knee part Ma of the driver M is restrained by the rear part of the elastic body 12b of the shock absorbing member 12, so that the movement of the driver's body can be easily controlled and the injury value can be further reduced.

  FIG. 6 is a view for explaining a third embodiment of the present invention, in which the same reference numerals as those in FIGS. 3 and 5 denote the same or corresponding parts.

  In the third embodiment, the bracket 12a of the shock absorbing member 12 moves the brake booster 10 away from the right knee Ma of the driver M when the brake booster 10 contacts the inclined surface 12a 'due to vehicle rearward displacement. It is configured to slightly rotate in the d direction facing the opposite side of the brake booster 10 while being guided.

  In the third embodiment, the shock absorbing member 12 guides the brake booster 10 in a direction away from the knee portion Ma (inner side in the vehicle width direction), and a little in the d direction where the bracket 12a itself faces outward in the vehicle width direction. It rotates, thereby moving the right knee Ma to the anti-brake booster 10 side. As a result, the right knee Ma can be further reliably moved away from the brake booster 10.

1 Car compartment 3 Front panel (panel member)
10 Brake booster 12 Shock absorbing member 12a Bracket 12a 'Inclined surface M Driver (occupant)
Ma Knee a Direction away from the knee c Direction toward the knee

Claims (2)

A front structure of an automobile in which a brake booster is disposed on the vehicle interior side of a front panel member that forms the front surface of the vehicle interior, and an impact absorbing member is attached to the vehicle interior member facing the passenger's knee through a bracket In
The brake booster is positioned on the vehicle front side of the bracket in plan view of the vehicle,
On the vehicle front side of the bracket, an inclined surface that is inclined so as to be located on the inner side or the outer side in the vehicle width direction is formed on the vehicle rear side portion.
The front structure of an automobile according to claim 1, wherein when the brake booster is displaced rearward during a vehicle front collision, the inclined surface guides the brake booster in a direction away from the knee. The front structure of an automobile according to claim 1,
The front structure of an automobile, wherein the shock absorbing member is displaced toward the knee when the brake booster is brought into contact with the inclined surface due to a rearward displacement of the vehicle.

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