JP3459346B2 - Automotive brake pedal structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake pedal device.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Laid-Open No. 6-1113, a brake pedal device for an automobile includes a dash lower panel and a dash lower panel which includes a pedal bracket rotatably supporting an upper end of a pedal arm. It is fastened and fixed to the lower surface of the dash upper panel that is joined to the lower panel and protrudes toward the passenger compartment side. , The master back is activated.

[0003]

When the master back or the dash lower panel fixing the master back is deformed and moves backward toward the passenger compartment during a frontal collision of the vehicle,
The rotational force to the reverse direction is the direction opposite to the direction of depression of the pedal arm through the push rod of the master back
There is a raw Jill fear.

[0004] Therefore, the present invention provides a motor vehicle brake pedal device capable Rukoto that anti resign from acting collision load to the pedal arm via the master back of the push rod during a frontal collision of the vehicle.

[0005]

According to a first aspect of the present invention, a pedal bracket fixed to a dash panel and a pedal shaft provided on the pedal bracket are rotatably supported to urge a rearward turning force. A pedal arm that is connected to a rear end of the push rod of the master back, and the pedal arm is connected to the master back via the push rod. peak to the front end, the push rod when the input of the backward direction acts by pushed down through the push rod, the projecting portion is provided for bending the push rod, projecting at the bottom of the raised portion, which protrudes to the left and right
The push rod supplementary part consisting of
It is characterized by being provided .

According to a second aspect of the present invention, the push rod according to the first aspect is provided with an easily bendable portion that bends with respect to an input other than the axial direction.

According to a third aspect of the present invention, when an input in the backward direction is applied to the push rod of the second aspect, the protrusion of the pedal arm comes into contact with the push rod in the vicinity of the easily bendable portion. The feature is that it is set as follows.

[0008]

[0009]

According to the first aspect of the present invention, the rear end of the push rod of the master bag is connected to the pedal arm,
At the front end of the pedal arm, there is a protrusion that pushes the push rod downward when the input in the backward direction is applied via the push rod to bend the push rod. It is possible to transmit the pedaling force to the master back via the push rod connected to the pedal arm by operation, and to perform the master back operation which is the same as the general brake pedal device, of course, the master back moves backward due to the front collision of the vehicle. Even if the push rod is moved and the push rod is moved backward accordingly, the push rod is bent by the projections to prevent the tension, so that the collision load can be prevented from being input to the pedal arm. Also, on the pedal arm
It is composed of pins protruding left and right at the bottom of the provided protrusion
A push rod supplemental part is provided along the vehicle width direction.
Therefore, make sure that the push rod is bent and deformed downward.
The reliability can be improved.

According to the second aspect, in addition to the effect of the first aspect, since the push rod is provided with an easily bendable portion that bends with respect to an input other than the axial direction, the push rod is formed by the protrusion at the front end of the pedal arm. It is possible to easily bend and deform the push rod to prevent the collision load from being input to the pedal arm when the lever is pushed down and bent.

According to the third aspect, in addition to the effect of the second aspect, when an input in the backward direction is applied to the push rod, the protruding portion of the pedal arm comes into contact with the easily bendable portion provided on the push rod. Since it is set so as to be in contact with each other, when the push rod is pushed down and bent by the protrusion at the front end of the pedal arm, the push rod is more surely bent and deformed to avoid the collision load being input to the pedal arm. You can

[0012]

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3, reference numeral 1 denotes a brake pedal unit, a pedal arm 2 having a pedal pad 3 at a lower end thereof, and a pedal in which an upper end portion of the pedal arm 2 is rotatably supported by a pedal shaft 5. The bracket 4 is provided, and the pedal arm 2 is urged by a return spring (not shown) to rotate backward.

Reference numeral 10 denotes a master back which is arranged on a side surface of the dash lower panel 20 on the engine room side and is pushed by the depression of a pedal arm 2 connected to a push rod 11 to generate hydraulic pressure in a brake unit (not shown). Show.

The push rod 11 has its rear end connected to the upper part of the pedal arm 2 via a pin 12.

Below the pedal shaft 5 at the front end of the pedal arm 2 and above the push rod 11,
When an input in the backward direction is applied via the push rod 11 at the time of a frontal collision of the vehicle, the push rod 11 is pushed downward to bend and deform the push rod 11, and the protrusion 6 for preventing the push rod 11 from being stretched. It is provided.

Further, the master back 10 is provided with a plurality of stud bolts 13 on its rear side, and the push rod 11 and these stud bolts 13 are attached to the dash lower panel 2.
The front wall 4A of the pedal bracket 4 is attached to the protrusion of the stud bolt 13 on the vehicle compartment side through the collar 14, and the dash lower panel 20 is sandwiched between the collar 14 and the rear side surface of the master back 10. When the nut 15 is screwed and fastened to the stud bolt 13 in this state, the master back 10 and the front wall 4A of the pedal bracket 4 are secured.
And are fixed to the dash lower panel 20 together.

To the upper end of the dash lower panel 20, there is joined a dash upper panel 21 which constitutes an air box 24 which also functions as a skeleton member in the vehicle width direction of the vehicle body front waist portion with the cowl top panel 23. The vehicle body side bracket 22 is joined and arranged on the lower surface of the panel 21, and the upper wall 4B of the pedal bracket 4 is fastened and fixed to the vehicle body side bracket 22 with bolts 16 and nuts 17.

Particularly in this embodiment, the push rod 11
In addition to having a sufficient strength that does not cause a problem with respect to an axial input such as a normal brake operation, when it is pushed down by the protrusion 6 at the front end of the pedal arm 2 during a frontal collision of the vehicle as described above. An easily bendable portion 7 having a rod diameter that promotes bending deformation of the push rod 11 is made thinner than that of other portions is provided on the.

Moreover, the projection 6 at the front end of the pedal arm 2
Is set so as to come into close contact with the easily bendable portion 7 when an input in the backward direction is applied to the push rod 11, and at the lower portion of the protruding portion 6, it projects to the left and right as a push rod supplementing portion. A pin 9 is provided.

In FIG. 1, 8 is a stopper bracket for restricting the backward rotation of the pedal arm 2, and 8a is the pedal arm 2.
And a stop lamp switch that abuts when not stepping on.

According to the structure of the above embodiment, the protrusion 6 does not come into contact with the push rod 11 in a normal state, and the protrusion 6 moves away from the push rod 11 when the pedal arm 2 is depressed. Since it moves, it does not act on the push rod 11 at all, and transmits the pedaling force to the master back 10 via the push rod 11 connected to the pedal arm 2, which is the same master brake operation as a general brake pedal device. Can be done.

Further, the master back 10 moves backward due to the frontal collision of the vehicle, and the push rod 1 is accordingly moved.
Even when the pedal arm 2 is moved backward while the pedal bracket 2 is rotated rearward while deforming the stopper bracket 8,
Moves downwards to come into contact with the push rod 11, and the push rod 11 can be bent to prevent the tension thereof. Therefore, it is possible to prevent an extra collision load from being input to the pedal arm 2.

In addition, the push rod 11 has a sufficient strength that does not cause a problem with respect to an axial input such as a normal brake operation, and the projection 6 at the front end of the pedal arm 2 at the time of a frontal collision of the vehicle as described above. When the push rod 11 is pushed down by means of an easy bending portion 7 for promoting bending deformation of the push rod 11, the protrusion 6 at the front end of the pedal arm 2 facilitates pushing the push rod downward to bend it. The push rod 11 can be bent and deformed to avoid the collision load from being input to the pedal arm 2.

Moreover, the projection 6 at the front end of the pedal arm 2
Is set so as to come into close contact with the easy bending portion 7 when an input in the backward direction is applied to the push rod 11, so that the push rod 11 is bent and deformed more reliably and collides with the pedal arm 2. It is possible to avoid inputting a load.

Further, since the pin 9 as a push rod supplemental portion is provided at the lower portion of the protrusion 6, the position of the push rod 11 may be displaced to the left or right due to the impact at the time of a frontal collision of the vehicle. Even if there is, the push rod 11 can be surely bent and deformed downward by the pin 9 as the push rod supplement portion, and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same embodiment.

FIG. 3 is an explanatory diagram of the same embodiment.

[Explanation of symbols]

1 Brake pedal unit 2 pedal arm 4 pedal bracket 5 pedal shaft 6 protrusion 7 Easy bend section 9-pin (push rod supplement) 10 Masterback 11 push rod 20 Dash lower panel (dash panel) 21 Dash upper panel (dash panel)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadahiro Kawahara 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Hiroyuki Mizuma 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. Incorporated (56) Reference JP-A-10-59146 (JP, A) JP-A-10-310035 (JP, A) US Patent 5921144 (US, A) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) B60T 7/06

Claims (3)

(57) [Claims] 1. A pedal bracket fixed to a dash panel, and a pedal arm rotatably supported by a pedal shaft provided on the pedal bracket and biased by a rearward turning force. In the structure in which the pedaling force is transmitted to the master back via the push rod, while connecting the rear end of the push rod of the master back to the pedal arm, the pedal arm is connected to the front end of the pedal arm in the backward direction via the push rod. input is pushed down push rod when applied, the protruding portion is provided, in the lower portion of the protrusion portion which is bent to the push rod, the left
Push rod supplementary part consisting of a pin protruding to the right
A brake pedal structure for an automobile, in which is provided along the vehicle width direction . 2. The brake pedal structure for an automobile according to claim 1, wherein the push rod is provided with an easily bendable portion that bends with respect to an input other than the axial direction. 3. The push rod is set so that when an input in the backward direction is applied, the protrusion of the pedal arm comes into contact with the push rod in the vicinity of the easily bendable portion. Brake pedal structure of the automobile described in.