JPH0752809A - Car-body structure of pedal and steering supporting part - Google Patents

Abstract

PURPOSE:To provide the car-body structure of a pedal and steering supporting part which can stabilize as mush as possibly the rate of the change of relative moving amount between a dashboard lower and a steering wheel in relation to an input load by a collision. CONSTITUTION:In the car-body structure of a pedal and steering supporting part having a pedal bracket 4 for supporting a pedal 5 by being connected to a dashboard upper 2 and a dashboard lower 1 and a steering hanger 8 for supporting a steering shaft 7 by being connected to a construction member 3 extending in a car width direction and the dashboard upper, the pedal bracket is bolted to the dashboard upper through a long hole and the steering hanger is bolted to the dashboard upper through a long hole. The part on the construction member to which the steering hanger is at least connected is constructed it in a double pipe structure having a clearance between an inner peripheral surface and an outer peripheral surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure of a pedal and a steering support part which is improved so that an input to the vehicle body in a frontal collision is not transmitted to a steering shaft as much as possible.

[0002]

2. Description of the Related Art In a conventional vehicle, a pedal bracket for swingably supporting pedals such as brakes and clutches is attached to a dashboard lower that separates an engine room from a vehicle compartment. The other end is fixed to the dashboard upper connected to the upper part of the dashboard lower, and the steering hanger for supporting the steering shaft is attached to the rear end of the dashboard upper (on the side closer to the passenger in the passenger compartment). ) Fixed structure is generally adopted.

When the support portion of the steering shaft is rigidly connected to the dashboard upper, when the engine moves toward the passenger compartment during a frontal collision, the dashboard upper is pushed together with the dashboard lower pushed by the engine. Since the vehicle also moves to the passenger compartment side, the steering shaft also moves to the passenger side, and as a result, the steering wheel may hit the passenger. As a structure to prevent such a situation, a structure that reduces the amount of retreat of the steering wheel by making the connecting portion between the dashboard lower and the dashboard upper easily deformed, For example, Jitsuko Sho 62-16
It is proposed in Japanese Patent No. 387.

[0004]

In realizing such a vehicle body structure, there is no influence on the strength under normal conditions, and the relationship between the input load and the displacement amount of the vehicle body at the time of a collision is constant. It is preferable that it can be configured to change at a rate of.

However, since the above-mentioned conventional structure eventually utilizes the deformation resistance in the plastic deformation region, the relationship between the input load and the displacement amount cannot avoid being suddenly changed before and after the yield point. .

The present invention has been devised in view of such knowledge, and its main purpose is to minimize the change rate of the relative movement amount between the dashboard lower and the steering wheel with respect to the input load due to a collision. It is an object of the present invention to provide a body structure of a pedal and a steering support portion that can be stabilized.

[0007]

According to the present invention, there is provided a pedal bracket which is connected to a dashboard upper and a dashboard lower to support a pedal, a structural member extending in a vehicle width direction, and A vehicle body structure of a pedal and a steering support portion having a steering hanger that is coupled to a dashboard upper and supports a steering shaft, wherein the pedal bracket is bolted to the dashboard upper through a long hole,
The steering hanger is bolted to the dashboard upper through a long hole, and at least a portion of the structural member to which the steering hanger is coupled is a double layer having a gap between an inner peripheral surface and an outer peripheral surface. This is achieved by providing a body structure for pedal and steering supports which is of pipe construction.

[0008]

According to this structure, the bolted portions of the pedal bracket and the dashboard upper can be displaced back and forth by the range of the long hole. When the dashboard upper is further retracted, the bolted portion of the steering hanger can be displaced back and forth by the range of the long hole. In addition to this, the transmission of displacement can be absorbed by the gap due to the double pipe having a gap between each other. With these cooperations, the amount of transmission of the backward movement of the dashboard lower to the steering wheel at the time of a collision is reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings.

FIG. 1 illustrates a pedal and steering shaft support constructed in accordance with the present invention. In the figure, the dashboard lower 1 separates the engine room E from the vehicle compartment P. A dashboard upper 2 formed in a box shape with a closed cross section is integrally coupled to the upper end of the dashboard lower 1. In addition, the structural member 3 made of a pipe material connects the bases of the left and right front pillars so that the dashboard upper 2
It extends along the rear edge of the. In addition, in this structural member 3, the mounting portion of the steering hanger upper described later is
It is composed of double pipes with appropriate gaps between them.

A pedal bracket 4 having a substantially triangular side view is attached between the surface of the dashboard lower 1 on the passenger compartment P side and the lower surface of the dashboard upper 2.
A brake pedal 5 is pivotally supported on the pedal bracket 4. The pedal bracket 4 is substantially rigidly connected to the dashboard lower 1, but is connected to the dashboard upper 2 by a bolt 6 having an appropriate shear strength. In addition, the bolt insertion hole H of the pedal bracket 4
Is a long hole that is long in the front-back direction (see FIG. 2).

A steering hanger lower 8 for supporting the front end side of the steering shaft 7 is fixed by a bolt 9 behind the mounting position of the pedal bracket 4 on the lower surface of the dashboard upper 2. The bolt insertion hole of the steering hanger lower 8 is also a long hole that is long in the front-rear direction, as described above. A steering hanger upper 10 for supporting the rear end side of the steering shaft 7 is provided integrally with the double pipe portion of the structural member 3.

Next, the operation of this embodiment will be described.

Input at the time of a frontal collision is the dashboard lower 1
, The dashboard lower 1 is deformed so as to plunge into the passenger compartment P side. Therefore, the pedal bracket 4 rigidly connected to the dashboard lower 1 also retracts and enters the vehicle interior P.

The dashboard upper 2 also tries to retract as the pedal bracket 4 retracts. However, since the bolt insertion hole H of the pedal bracket 4 is a long hole as shown in FIG. On the other hand, the pedal bracket 4 retracts with slip resistance, and the transmission of the input load to the dashboard upper 2 is reduced. Then, when a force exceeding slip resistance between the dashboard upper 2 and the pedal bracket 4 is applied, the bolt 6 is sheared and the connection between the dashboard upper 2 and the pedal bracket 4 is released.

On the other hand, the input to the dashboard lower 1 is directly transmitted to the dashboard upper 2 as well as via the pedal bracket 4. This acts as a force to retract the steering shaft 7 together with the steering hanger lower 8, but since the steering hanger lower 8 and the dashboard upper 2 are bolted together through a long hole, the steering wheel also shifts back and forth during this time. Hangarowa 8
The rearward displacement of the is eased.

Further, the input load is also transmitted to the steering hanger upper 10 via the structural member 3, but this is also suitably absorbed by crushing the double pipe in the same portion.

[0018]

As described above, according to the present invention, the input acting on the dashboard lower is sequentially absorbed at a plurality of connection points, and as a result, the amount of transmission to the steering shaft is greatly reduced. Therefore, it is possible to exert a great effect in alleviating the backward movement of the steering wheel at the time of a vehicle collision.

[Brief description of drawings]

FIG. 1 is a side view showing a pedal and a steering support according to the present invention in a partial cross section.

FIG. 2 is a plan view of an elongated hole through which a bolt is inserted.

[Explanation of symbols]

 E Engine room P Vehicle room H Bolt insertion hole 1 Dashboard lower 2 Dashboard upper 3 Structural member 4 Pedal bracket 5 Brake pedal 6 Bolt 7 Steering shaft 8 Steering hanger lower 9 Bolt 10 Steering hanger upper

Claims (1)

[Claims] 1. A pedal bracket connected to a dashboard upper and a dashboard lower to support a pedal, and a steering hanger connected to a structural member extending in the vehicle width direction and a dashboard upper to support a steering shaft. A vehicle body structure of a pedal and a steering support portion having, wherein the pedal bracket is bolted to the dashboard upper through a long hole, and the steering hanger is bolted to the dashboard upper through a long hole. At least a portion of the structural member to which the steering hanger is coupled has a double pipe structure in which a gap is provided between an inner peripheral surface and an outer peripheral surface. Construction.