JPH11198777A - Brake pedal structure for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake pedal device for car capable of preventing a collision load from acting on a pedal arm through a master back push rod and avoiding it from being interfered with a steering member by a backward movement of a pedal bracket at the time of frontal collision of a vehicle. SOLUTION: A master back is moved backward when a frontal collision of a vehicle occurs and, therefore, even if an collision input acts on a peal bracket 1 in backward direction, the pedal bracket 1 is suppressed from moving backward by a collision absorbing means so as to avoid it from being interfered with a steering member 23. Also a clearance between a pedal shaft 3 and a sub shaft 19 is reduced and a push rod lever 15 is moved backward and, therefore, a collision load can be prevented from acting on a pedal arm 2 through a link 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a brake pedal device for a motor vehicle.

[0002]

2. Description of the Related Art As shown in, for example, Japanese Utility Model Laid-Open Publication No. Hei 6-1113, a front wall of a pedal bracket which pivotally supports the upper end of a pedal arm is mounted on a dash lower panel. The pedal arm is fastened and fixed with bolts and nuts, and the upper wall of the pedal bracket is fastened and fixed with bolts and nuts to the lower surface of a dash upper panel that is joined to the dash lower panel and protrudes toward the passenger compartment. By pressing down, the push rod connected to the pedal arm is pushed forward to operate the master back.

[0003]

When a master back or a dash lower panel to which the master back is fixed is deformed at the time of a frontal collision of the vehicle and the vehicle moves backward toward the passenger compartment,
A turning force in the reverse direction, which is opposite to the stepping direction, acts on the pedal arm via the push rod of the master back, and the depressed position of the brake pedal may shift rearward, causing a sense of incongruity.

Further, since the pedal bracket is fastened and fixed to the dash lower panel and the lower surface of the dash upper panel as described above, the dash lower panel is deformed toward the passenger compartment at the time of a frontal collision of the vehicle, so that the pedal bracket is mounted on the dash lower panel. When the pedal bracket is moved backward together with the dash lower panel, a rotational moment is generated in the pedal bracket obliquely upward and rearward with the fastening point with the lower surface of the dash upper panel as a fulcrum. There is a possibility that the rear end of the bracket may interfere with a steering member that supports a steering column that is disposed obliquely above and behind the bracket.

Accordingly, the present invention prevents a collision load from acting on the pedal arm via the push rod of the master back in the event of a frontal collision of the vehicle, thereby avoiding a sense of incongruity, and at the same time avoiding the dash lower panel on the vehicle interior side. An object of the present invention is to provide a brake pedal device for an automobile which can prevent the pedal bracket from interfering with the steering member even when the pedal bracket moves backward due to the deformation.

[0006]

According to the present invention, a pedal bracket fixed across a dash upper panel and a dash lower panel is rotatably supported by a pedal shaft provided on the pedal bracket. A push rod lever connected to a push rod of a master back is rotatably supported on a sub shaft provided in parallel with the front of the pedal shaft. The upper end of the push rod lever projects above the sub shaft, the upper end of the pedal arm and the upper end of the push rod lever are connected via a link, and the pedaling force of the pedal arm is transmitted via the push rod. To the master back, and after exceeding the specified load on the pedal bracket. When the direction of action of the input, the collision absorbing means for allowing a reduction movement in the vehicle longitudinal direction, is characterized in that provided between the pedal shaft and the sub shaft of the pedal bracket.

According to a second aspect, the collision absorbing means according to the first aspect is constituted by a bead portion provided between the arrangement of the pedal shaft and the sub shaft of the pedal bracket.

According to a third aspect of the present invention, the pedal bracket according to the first aspect is fixed to a dash lower panel, and is fixed to a front bracket supporting a push rod lever via a sub shaft, and a dash upper panel, It is characterized in that it is divided into a rear bracket that supports the pedal arm via a pedal shaft, and the front bracket is connected to the rear bracket so as to be slidable rearward with respect to the rear bracket, thereby constituting a collision absorbing means. And

[0009]

According to the present invention, there is provided a pedal arm rotatably supported by a pedal shaft provided on a pedal bracket, and an upper end portion of the pedal arm protruding above the pedal shaft. The push rod lever connected to the push rod of the master back is rotatably supported on a sub shaft provided in parallel with the front of the pedal, and the upper end of the push rod lever is arranged so as to protrude above the sub shaft, and these pedals are provided. The upper end of the arm and the upper end of the push rod lever are connected via a link so that the pedaling force of the pedal arm is transmitted to the master back via the push rod, and the pedal bracket is moved in a retreating direction exceeding a predetermined load. When the input works
Since the collision absorbing means for allowing the vehicle to shrink in the front-rear direction is provided between the pedal shaft and the sub-shaft of the pedal bracket, the pedal is normally connected to the upper end of the pedal arm by depressing the pedal arm. By operating the push rod lever via the link and transmitting the pedaling force to the master back via the push rod connected to the push rod lever, it is possible to perform the master back operation which is the same as a general brake pedal device. Even if the master back retreats due to a frontal collision of the vehicle and the dash lower panel is deformed toward the passenger compartment, the pedal bracket is moved to the rear end of the pedal bracket by the collision absorbing means between the pedal shaft and the sub shaft. Reverse movement is suppressed, and the pedal bracket is positioned near the rear end. It can be avoided from interfering with the steering member disposed in a square position.

Further, the distance between the upper end of the push rod lever and the upper end of the pedal arm is relatively reduced since the collision absorbing means reduces the distance between the pedal shaft and the sub shaft and moves the push rod lever backward. As a result, the upper end of the push rod lever pushes the upper end of the pedal arm backward through the link to generate a turning force in the stepping direction on the pedal arm, so that the driver's foot does not feel uncomfortable at all. .

According to the second aspect, in addition to the effect of the first aspect, the collision absorbing means is constituted by a bead portion provided between the arrangement of the pedal shaft and the sub-shaft of the pedal bracket. Even if a rearward direction input is applied to the pedal bracket due to a frontal collision, the bead portion is crushed to absorb the collision input, thereby suppressing the backward movement of the pedal bracket and reliably reducing the distance between the pedal shaft and the sub shaft. Can be done.

According to the third aspect, in addition to the effect of the first aspect, in addition to the effect of the first aspect, the pedal bracket is fixed to the dash lower panel, and is fixed to the front bracket supporting the push rod via the sub shaft and the dash upper panel, Because it is formed separately from a rear bracket that supports the pedal arm via a pedal shaft, and the front bracket is connected to the rear bracket so as to be slidable rearward with respect to the rear bracket, thereby constituting the collision absorbing means. Even if the front bracket moves backward due to the deformation of the dash lower panel toward the passenger compartment due to the frontal collision of the vehicle, the front bracket only slides rearward with respect to the rear bracket, and the rear bracket moves backward. The rear bracket is located above the rear end of the rear bracket. Together it is possible to further ensure avoidance of interference to Ngumenba, it can be reliably reduced between the pedal shaft and a sub shaft.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 4, reference numeral 1 denotes a pedal bracket, and 2 denotes a pedal which is rotatably supported by a pedal shaft 3 provided on the pedal bracket 1 and whose upper end protrudes above the pedal shaft 3. The arm has a pedal pad 8 at the lower end.

The pedal bracket 1 is formed in an inverted L-shape on the side, and its front wall 1a is fastened and fixed to the dash lower panel 4 with bolts and nuts (not shown).
A stopper bracket 6 connected to the rear end of the pedal bracket 1 is connected to the rear wall of the dash upper panel 5 which is joined to the dash lower panel 4 and protrudes toward the passenger compartment, and is attached in a forwardly inclined state.

Further, when an input in a backward direction exceeding a predetermined load acts on the pedal bracket 1, a collision absorbing means for permitting a contraction movement in the vehicle front-rear direction is provided with a pedal shaft 3 of the pedal bracket 1 and a subshaft 19 described later. And between them.

A push rod 15 is rotatably supported by a sub-shaft 19 provided in parallel with the front of the pedal shaft 3, and is connected at its lower end to a push rod 14 of a master bag (not shown) via a pin 16. A lever is shown, and the upper end of the push rod lever 15 is arranged so as to protrude above the sub-shaft 19, and the upper end of the push rod lever 15 and the upper end of the pedal arm 2 are connected via pins 9 and 10. The link is connected by a link 11 so that the pedaling force of the pedal arm 2 is transmitted to the master back via the push rod 14.

As a specific operation, when the pedal pad 8 at the lower end of the pedal arm 2 is pushed forward of the vehicle, the upper end of the pedal arm 2 rotates rearward about the pedal shaft 3 as a rotation center, and Pull the upper end of the push rod lever 15 backward.

Therefore, the push rod lever 15 pushes the lower end forward with the sub shaft 19 as the center of rotation,
The push rod 14 connected to the lower end is pushed forward to transmit the pedaling force of the pedal arm 2 to a master back (not shown).

Reference numeral 18 denotes a return spring stretched between the pedal bracket 1 and the pedal arm 2, and the return spring 18 urges the pedal arm 2 to rotate backward.

Particularly in this embodiment, a vertical bead portion 12 serving as the collision absorbing means is provided between the arrangement of the pedal shaft 3 and the sub shaft 19 of the pedal bracket 1.
In order to reliably operate the bead portion 12 as a collision absorbing means, a reinforcing bead 1b in the front-rear direction may be provided on the front side of the sub-shaft 19.

In FIGS. 1 and 2, reference numeral 7 denotes a stopper provided at the lower end of the stopper bracket 6 for restricting the pedal arm 2 from turning backward.

According to the structure of the above-described embodiment, the pedal arm 2 is rotatably supported by the pedal shaft 3 provided on the pedal bracket 1, and has an upper end protruding above the pedal shaft 3. A push rod lever 15 connected to a push rod 14 of a master back (not shown) is rotatably supported on a sub shaft 19 provided in parallel with the front of the pedal shaft 3, and an upper end of the push rod lever 15. Are projected above the sub-shaft 19, the upper end of the pedal arm 2 and the upper end of the push rod lever 15 are connected via the link 11, and the pedaling force of the pedal arm 2 is shown via the push rod 14. In addition to transmitting to the outside master back, when a backward input exceeding a predetermined load acts on the pedal bracket 1, Since a bead portion 12 as a collision absorbing means for allowing a contraction movement in the front-rear direction of the vehicle is provided between the pedal shaft 3 of the pedal bracket 1 and the sub shaft 19, the pedal operation of the pedal arm 2 in a normal state. By operating the push rod lever 15 via the link 11 connected to the upper end of the pedal arm 2, the pedaling force is transmitted to the master back (not shown) via the push rod 14 connected to the push rod lever 15, and the general brake pedal It is possible to perform the master back operation which is the same as that of the device. Of course, even if the master back moves backward due to the frontal collision of the vehicle, and the dash lower panel 4 is deformed toward the passenger compartment, the pedal bracket 2 is not moved. Bead part 12 as a collision absorbing means between the pedal shaft 3 and the sub shaft 19 Thus, the collision input can be absorbed to prevent the rearward movement of the rear end of the pedal bracket 2 from being moved, and the pedal bracket 2 can be prevented from interfering with the steering member 23 disposed at an upper position near the rear end. it can.

In addition, in the event of a frontal collision of the vehicle, the bead portion 12 serving as a collision absorbing means reduces the distance between the pedal shaft 3 and the sub-shaft 19 and moves the push rod lever 15 rearward. The distance between the upper end of the rod lever 15 and the upper end of the pedal arm 2 is reduced, and the upper end of the push rod lever 2 pushes the upper end of the pedal arm 2 rearward via the link 11 so that the pedal arm 2 Since the turning force is generated in the stepping direction, the driver's feet do not feel uncomfortable at all.

In the present embodiment, the collision absorbing means is constituted by the bead portion 12 provided between the arrangement of the pedal shaft 3 of the pedal bracket 2 and the sub shaft 19 as described above. Therefore, even if an input in the backward direction acts on the pedal bracket 2 due to a frontal collision of the vehicle, the bead portion 12 is crushed to absorb the collision input, thereby suppressing the backward movement of the pedal bracket 2 and ensuring the pedal movement. The space between the shaft 3 and the sub shaft 19 can be reduced.

It should be noted that only the reinforcing beads 1b, 1b in the front-rear direction may be provided on the front side of the sub-shaft 19 to relatively weaken the space between the pedal shaft 3 and the sub-shaft 19 to serve as a collision absorbing means.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the first embodiment shown in FIGS.
The pedal bracket 1 of the embodiment is connected to the dash lower panel 4.
, And the push rod lever 15 is fixed to the shaft supporting front bracket 1 </ b> A and the dash upper panel 5 via the sub shaft 19 via the stopper bracket 6 at the rear end thereof, and the pedal arm 2 via the pedal shaft 3.
And a rear bracket 1B pivotally supporting the front bracket 1B, and the front bracket 1A is connected to the rear bracket 1B so as to be slidable rearward, thereby constituting a collision absorbing means.

Specifically, a front bracket 1A,
Slots 21 and 22 are formed in the rear bracket 1B and fastened and fixed by bolts 20 so that when an input in a retreating direction exceeding a predetermined load is applied, it slides to absorb a collision input.

According to the structure of this embodiment, the pedal bracket 1 is divided into the front bracket 1A and the rear bracket 1B, and the front bracket 1A can be slid rearward with respect to the rear bracket 1B. And the front bracket 1A moves rearward as the dash lower panel 4 is deformed toward the cabin due to a frontal collision of the vehicle, the front bracket 1A is connected to the rear of the vehicle. Bracket 1B
, The rearward movement of the rear bracket 1B can be suppressed by merely sliding backward, so that interference with the steering member 23 disposed above the rear end of the rear bracket 1B can be avoided more thoroughly. The pedal shaft 3 and the sub shaft 19
, The distance between the push rod lever 15 and the pedal arm 2 is relatively reduced, and the upper end of the push rod lever 15 is
By pushing the upper end of the pedal backward, a turning force is generated in the pedal arm 2 in the stepping direction, so that the driver's foot does not feel uncomfortable at all.

[Brief description of the drawings]

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

FIG. 2 is a side view showing the state of collision absorption of the embodiment.

FIG. 3 is a plan view of the embodiment.

FIG. 4 is a plan view showing the state of collision absorption of the embodiment.

FIG. 5 is an explanatory view showing a second embodiment of the present invention.

[Description of Signs] 1 pedal bracket 1A front bracket 1B rear bracket 2 pedal arm 3 pedal shaft 4 dash lower panel 5 dash upper panel 11 link 12 bead portion (collision absorbing means) 14 push rod 15 push rod lever 19 sub shaft

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshihiro Kawahara, Nissan Motor Co., Ltd. 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Inventor Hiroyuki Mizuma 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. Inside

Claims (3)

[Claims] 1. A pedal bracket fixed across a dash upper panel and a dash lower panel, a pedal rotatably supported by a pedal shaft provided on the pedal bracket, and having an upper end protruding above the pedal shaft. A push rod lever connected to a push rod of a master back is rotatably supported on a sub shaft provided in parallel with the front of the pedal shaft, and an upper end of the push rod lever is connected to the sub shaft by an arm. The upper end of the pedal arm is connected to the upper end of the push rod lever via a link so that the pedaling force of the pedal arm is transmitted to the master back via the push rod. When the input in the reverse direction exceeding the specified load acts on the bracket, A brake pedal structure for an automobile, characterized in that a collision absorbing means for allowing a reduction movement in a direction is provided between a pedal shaft and a sub shaft of the pedal bracket. 2. The brake pedal structure for an automobile according to claim 1, wherein the collision absorbing means is constituted by a bead portion provided between the arrangement of the pedal shaft and the sub shaft of the pedal bracket. 3. A front bracket fixed to a dash lower panel and supporting a push rod lever via a sub shaft, and a rear bracket fixed to a dash upper panel and supporting a pedal arm via a pedal shaft. 2. The brake pedal according to claim 1, wherein the brake pedal is formed separately from the bracket, and the front bracket is connected to the rear bracket so as to be slidable rearward with respect to the rear bracket. Construction.