JP2012088974A - Brake pedal supporting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supporting structure for a brake pedal in which the brake pedal can be surely suppressed from being displaced backward, by separating a revolving shaft integrated with the brake pedal from a bracket in simple configuration upon the front collision of a vehicle.SOLUTION: A supporting structure comprises: a dash panel 12; a brake pedal 15; a brake booster 18; a turning shaft 16 which connects the brake pedal and the brake booster; a first supporting member 21 which supports the turning shaft in the vicinity of the brake pedal; a second supporting member 22 which supports another end portion side of the turning shaft in the vicinity of the brake booster; and a reinforcing member 23 of which the left and right end portions are coupled to the first supporting member and the second supporting member, and of which the front end portion is coupled to the dash panel. In the reinforcing member 23, a chipping portion c1 is formed. A side-edge flange portion 411 of a second reinforcing member 41 is coupled to the second supporting member 22 on a wall surface at a side opposed to the reinforcing member 23. A front-end flange portion 412 of the second reinforcing member is fixed on the dash panel.

Description

  The present invention relates to a brake pedal support structure suitable for use in a vehicle.

  Conventionally, in the case of a frontal collision of the vehicle, the release mechanism is operated in accordance with the rearward deformation of the dash panel, and the brake pedal pivotally supported by the bracket is supported by the bracket supported on the inner wall surface of the dash panel, and the brake pedal. It is known that the integral rotating shaft is detached downward, thereby suppressing the backward movement of the brake pedal and facilitating occupant space securing during a frontal collision.

For example, Patent Document 1 (Japanese Patent Laid-Open No. 2007-185990) discloses a brake pedal support structure having a support member bracket having a substantially rectangular frame shape that pivotally supports a pipe-shaped rotating shaft directed in the vehicle width direction. ing. Here, as shown in FIG. 10, the support member bracket 100 has a substantially rectangular frame shape and is integrally joined to the vehicle interior wall surface of the dash panel 110. Between the left and right vertical plate-like brackets 120, 130 of the support member bracket 100, the left and right end portions of the pipe-shaped rotating shaft 140 facing the vehicle width direction Y are pivoted. The rotary shaft 140 is integrally coupled with a brake pedal 150 near one end and an arm member 170 coupled with a push rod 161 of the brake booster 160 near the other end.
The upper end edges of the left and right vertical plate-like brackets 120 and 130 are connected to each other by a plate-like stay member 180 having a U-shape in plan view, thereby ensuring the rigidity of the support member bracket 100. .

The support member bracket 100 receives an overload P0 when the vehicle collides, and the right bracket 130 comes into contact with the stopper member 190 on the vehicle body side with the rearward deformation of the dash panel 110, and the left bracket 120 on the brake booster 160 side. Only moves backward (downward in FIG. 10) as indicated by a two-point difference line.
At that time, the periphery of the notch ck formed in the front vertical flange 181 of the U-shaped stay member 180 that has maintained rigidity forms a stress concentration portion p1 and is bent and deformed. Accordingly, the left bracket 120 is displaced so that the relative distance L0 between the left bracket 120 and the right bracket 130 is increased, the rotating shaft 140 is detached from the pivotal support 121 of the left bracket 120, and the brake pedal 150 is moved downward (in FIG. 10). It is possible to secure the space for the occupant by suppressing the displacement to the rear side (the lower side in FIG. 10), which is displaced to the back side of the paper surface, and backward.

JP 2007-185990 A

However, the U-shaped plate-like stay members 180 connected to the left and right brackets 120 and 130 are integrally joined to each other so as to ensure rigidity that can withstand the operation of the brake pedal 150 in a normal state. Yes.
For this reason, when a frontal collision of the vehicle occurs, the left ply bracket 120 and the stay member 180 are bent even if the stress-concentrated portion p1 of the U-shaped stay member 180 is bent and deformed next. Do not separate and move backward as indicated by a two-point difference line.

In this case, the rear end side of the left bracket 120 is displaced toward the right bracket 130 side. As a result, the relative distance L0 on the rear end side of the left and right brackets is not so wide, and the left end portion of the rotating shaft 140 may not be detached from the pivotal support portion 121 of the left bracket 120. In such a case, it is impossible to achieve the initial downward displacement of the brake pedal 150 in which the brake pedal 150 integrated with the rotating shaft 140 is displaced downward to suppress the backward movement, and improvement is desired.
The present invention has been made on the basis of the above-described problems. The object of the present invention is to disengage the rotating shaft integrated with the brake pedal below the bracket with a simple configuration even when the front of the vehicle collides. Thus, it is an object of the present invention to provide a brake pedal support structure that can reliably prevent the brake pedal from being displaced backward.

  The invention of claim 1 of the present application is a dash panel that constitutes a vehicle compartment front wall, a brake pedal that is operated by a driver of the vehicle, and a vehicle width center side of the vehicle that is separated from the brake pedal. The disposed brake booster, the rotating shaft connecting the brake pedal and the brake booster, and the dash panel in the vicinity of the brake pedal are fixed to the dash panel and rotatably support one end side of the rotating shaft. A first support member, a second support member fixed to the dash panel in the vicinity of the brake booster, and rotatably supporting the other end portion side of the rotating shaft, and one side portion coupled to the first support member And a reinforcing member whose other side portion is coupled to the second support member and whose front end portion is fixed to the dash panel. The reinforcing member has a rear edge that is opened rearward of the vehicle. A rear notch is formed, and a fragile portion is formed in the rear notch. The side wall of the second reinforcing member is on the wall opposite to the wall to which the reinforcing member is coupled. And the front end of the second reinforcing member is fixed to the dash panel.

  The invention of claim 2 of the present application is characterized in that, in the brake pedal support structure according to claim 1, the weakened portion is formed closer to the brake pedal than the center of the reinforcing member in the vehicle width direction.

  A third aspect of the present invention is the brake pedal support structure according to the first or second aspect, wherein a plurality of the weakened portions are formed apart from each other in the rear notch.

  According to a fourth aspect of the present invention, in the brake pedal support structure according to the first, second, or third aspect, the fragile portion is a defective portion formed at a rear edge portion of the reinforcing member.

  A fifth aspect of the present invention is the brake pedal support structure according to any one of the first to fourth aspects, wherein the deck cross member extends in the vehicle width direction behind the dash panel and the deck cross member. And a guide member fixed to the rear end portion of the first support member, and located between the deck cross member and the rotation shaft of the brake pedal. A sloping wall formed so as to extend in the front-rear direction of the vehicle and to be positioned outside the vehicle width of the vehicle toward the rear side of the vehicle. It has the part.

  A sixth aspect of the present invention is the brake pedal support structure according to any one of the first to fifth aspects, wherein the rotating shaft is provided with a lever member connected to the brake booster, and the brake pedal is provided. Is fixed to the pivot shaft on the other end side of the first support member and close to the first support member, and the lever member is close to the second support member and the second support member. It is fixed to the rotating shaft on the one end side of the support member.

  In the first aspect of the present invention, the rigidity of the reinforcing member is ensured by the reinforcing member, but when the front of the vehicle collides, the weakened portion formed in the reinforcing member is displaced to ensure the rigidity of the reinforcing member. It is allowed that the space between the first support member and the second support member integrally coupled to the both side portions is widened, and in addition, the second reinforcing member whose front end is fixed to the dash panel is displaced backward. In this case, the second support member integrally coupled with the first support member is forcibly displaced in a direction away from the first support member, so that the space between the first support member and the second support member also increases in this respect. The pivot shaft of the brake pedal supported by the first support member and the second support member can be positively dropped, and the brake pedal can be reliably prevented from retreating with a simple configuration. In addition, a rear notch that is open to the rear of the vehicle is formed at the rear edge, so that it can be formed in a U shape in plan view, can be reduced in weight, and has received an overload at the time of front collision of the vehicle In this case, it becomes easy to promote stress concentration on the fragile part on the rear notch part, and the distance between the first support member and the second support member is promoted, and the rotation shaft is rotated by the first support member and the second support member. It is possible to make it easier to release.

  In the invention of claim 2, when the front of the vehicle collides, stress concentrates on the weakened portion formed on the brake pedal side from the center of the reinforcing member in the vehicle width direction. Therefore, the first support member and the second support member It is possible to increase the spacing in a space-saving manner.

  According to the invention of claim 3, when the second reinforcing member is displaced backward, the second weakened portion is forced to displace in a direction away from the first supporting member. Expansion of the space between the first support member and the second support member can be promoted, and the rotation shaft can be more easily separated from the first support member and the second support member.

  In the invention according to claim 4, when the front of the vehicle collides, the lacking portion of the rear edge portion of the reinforcing member forms a stress concentration portion, so that the peripheral portion can be weakened and easily deformed to form the first support. Expansion of the space between the member and the second support member can be promoted.

  According to the fifth aspect of the present invention, when the front of the vehicle collides, the brake pedal is twisted using the force input to the dash panel from the front of the vehicle, and the brake pedal can be prevented from moving backward.

  According to the sixth aspect of the present invention, the brake pedal, the first support member, the lever member, and the second support member regulate the displacement of the rotating shaft in the axial direction thereof, so that a reliable brake can be obtained in normal times. While enabling the pedal operation, when the front of the vehicle collides, it is possible to prevent the rotation shaft from being hindered from coming off the first support member or the second support member.

1 is an overall configuration diagram of a brake pedal support structure as one embodiment of the present invention. It is a front view of the brake pedal support structure of FIG. It is a schematic principal part top view of the support frame of the brake pedal used with the brake pedal support structure of FIG. 1, (a) shows normal time, (b) shows the time of front collision. It is an XX line expanded sectional view in Drawing 1 of a brake pedal support structure concerning one embodiment of the present invention. The schematic principal part top view of the support frame of the brake pedal used with the brake pedal support structure which concerns on other embodiment of this invention is shown, (a) shows normal time, (b) shows the time of front collision. The modification of the weak part employ | adopted by other embodiment of this invention is shown, (a) is a principal part expansion notch top view of a 1st modification, (b) is a principal part expansion notch side view of a 2nd modification. (C) is a principal part expansion notched side view of the 3rd modification. It is a perspective view from diagonally upward of the support frame of the brake pedal used with the brake pedal support structure of FIG. It is a perspective view from diagonally downward of the support frame of a brake pedal used with the brake pedal support structure of FIG. It is a perspective view from the upper side after the deformation | transformation at the time of the front collision of the support frame of the brake pedal used with the brake pedal support structure of FIG. It is a principal part schematic diagram of the conventional brake pedal support structure apparatus.

Hereinafter, a brake pedal support structure according to a first embodiment of the present invention will be described.
FIG. 1 is an overall configuration diagram of a brake pedal support structure according to the present invention.
As shown in FIG. 1, the vehicle 1 is provided with a dash panel 12 that forms the front surface of the passenger compartment 11, and is a pipe member that extends in the vehicle width direction Y (the front-rear direction in FIG. 1) and forms the vehicle body. A certain deck cross member 13 is provided behind the dash panel 12.
A support member bracket 14 having a rectangular frame shape is fixed to the inner wall surface of the dash panel 12, and a pipe 16 that is a pivot shaft integrally with the brake pedal 15 is supported on the support member bracket 14. In other words, a brake pedal 15 is fixed to the pipe 16, and the brake pedal 15 can be rotated within a predetermined range with the pipe 16 as a rotation axis by a stepping operation by a driver.

As shown in FIGS. 7 and 8, the support member bracket 14 includes a booster side bracket (second support member) 21, a pedal side bracket (first support member) 22, and a front end vertical edge 221 of the pedal side bracket 22. The second reinforcing member integrally joined to the wall surface of the booster side bracket 21 on the center side of the vehicle body, and the front board portion 25 that bends and extends, the stay member (reinforcing member) 23 that connects between the upper end edges of the brackets 21 and 22. And the member 41, and the whole forms a substantially rectangular frame shape.
As shown in FIGS. 3A and 3B, the front substrate portion 25 is superposed on the dash panel 12. Further, a plurality of locations are fastened to each other by a plurality of bolts B across the brake booster 18 attached to the front wall of the dash panel 12 and the dash panel 12.

Further, as shown in FIGS. 3A and 3B, circular hole portions 212 and 222 are formed in the vicinity of the central portions of the booster side bracket 21 and the pedal side bracket 22, respectively. A bush 24 (see FIG. 4) is fitted into the holes 212 and 222 to form a pivotal support. Further, by inserting the pipe 16 into the bush 24, the left end portion (the other end portion) of the pipe 16 is rotatably supported by the booster side bracket 21, and the right end portion (the one end portion) is supported by the pedal side bracket. 22 is rotatably supported.
Further, as shown in FIG. 1, a groove-like buckling portion (low rigidity portion) recessed toward the opposite side of the booster side bracket 21 (the front side in FIG. 1) on the lower edge portion of the pedal side bracket 22. ) 22b is formed, and the rigidity of the pedal side bracket 22 is partially reduced. When the front of the vehicle 1 collides, the buckling portion 22b is deformed to cause buckling. .

Further, as shown in FIG. 2, a stay member (reinforcing member) 23 is connected between the upper end edges of the booster side bracket 21 and the pedal side bracket 22. In this way, when a collision occurs in front of the vehicle 1 and an overload is applied while increasing the rigidity of the booster side bracket 21 and the pedal side bracket 22, the booster with respect to the pedal side bracket 22 is appropriately deformed as described later. The relative displacement of the side bracket 21 is allowed, and the brake pedal 15 can be prevented from moving backward.
As shown in FIG. 2 and FIG. 3A, the stay member 23 has a horizontal flange portion 231 formed in a substantially U shape that forms a main portion, and a pedal-side bracket 22 of the horizontal flange portion 231 that faces the pedal member. Bends upward from the side edge and bends upward from the pedal side flange (one side part) 232 that is integrally joined to the pedal side bracket 22 and the other side edge of the horizontal flange part 231 facing the booster side bracket 21. Then, the booster side flange (other side part) 233 integrally joined to the extension booster side bracket 21 and the dash panel 12 through the extension front substrate part 25 bent upward from the front end edge facing the dash panel 12. And a front flange (front end portion) 234 integrally joined to each other.

  Further, as shown in FIG. 2, the horizontal flange 231 which is the main part of the stay member 23 is formed with a rear notch 231a that opens to the rear side of the vehicle (the front side in FIG. 2). It is formed in a substantially U shape. A deficient portion c1 as a fragile portion is formed in the front end edge portion which is the deepest side of the rear cutout portion 231a. The deficient portion c1 is formed by being cut in an arc shape to the vicinity of the front end portion 234. As a result, when the booster side bracket 21 receives an overload P0 in a direction in which the booster side bracket 21 is displaced to the rear side (the front side in FIG. 2) relative to the pedal side bracket 22, the missing portion c1 becomes the stress concentration portion. Thus, it functions to form a fragile part that facilitates bending deformation.

The booster side bracket 21 having a vertically oriented plate shape has a booster side flange (other side portion) 233 of the horizontal flange portion 231 integrally joined to the wall surface facing the pedal side bracket 22, and the vehicle body center opposite to the wall surface. A side edge 411 of the second reinforcing member 41 is integrally joined to the side wall surface.
As shown in FIGS. 3A and 3B, the second reinforcing member 41 has a main plate portion 410 in the shape of a long plate, bent to a portion facing the booster side bracket 21, and a side edge flange portion 411. And the same side flange portion 411 is welded to the booster side bracket 21. Further, the front end flange portion 412 is formed by bending at a portion facing the front end vertical edge portion 211 of the main portion 410, the front end flange portion 412 is overlapped with the front end vertical edge portion 211, and both are overlapped to form a bolt on the dash panel 12. B is integrally joined.

Thus, the main portion 410 of the second reinforcing member 41 is integrally welded to the wall surface of the booster side bracket 21, and the front end flange portion 412 is integrally joined to the dash panel 12 via the front end flange portion 412. The reinforcing member 41 can further enhance the coupling rigidity of the booster side bracket 21 with respect to the dash panel 12, particularly the coupling rigidity that suppresses the displacement of the booster side bracket 21 in the vehicle width direction Y.
Next, as shown in FIG. 2, the pipe 16 is disposed so as to hold a protruding portion 161 that slightly protrudes to the right from the hole portion 222 that forms the pivotal support portion of the pedal-side bracket 22.

Further, a booster connecting arm (lever member) 17 is fixed to the pipe 16 in the vicinity of the booster side bracket 21 and on the pedal side of the booster side bracket 21. The booster connecting arm 17 is connected to a push rod 181 (see FIG. 3A) of the brake booster 18. The brake booster 18 is provided in front of the dash panel 12 and offset from the brake pedal 15 to the left (the booster side bracket 21 side) in front of the vehicle 1.
Further, a brake pedal 15 is fixed to the pipe 16 in the vicinity of the pedal side bracket 22 and closer to the booster side bracket 21 than the pedal side bracket 22.
Therefore, when the pipe 16 is about to be displaced toward the vehicle body center side (left side in FIG. 2), the booster side bracket 21 and the booster connecting arm 17 interfere with each other, and conversely, the pipe 16 is on the vehicle side end side (right side in FIG. 2). If the brake pedal 15 and the pedal-side bracket 22 interfere with each other, the excessive displacement of the pipe 16 on the left and right can be restricted.

Further, the pipe 16 is provided with no parts on the surface on the vehicle body center side (left side in FIG. 2) of the booster side bracket 21, so that the front of the vehicle collides with the pedal side bracket 22. When the interval between the booster side bracket 21 (see reference numeral L1 in FIG. 2) is widened, the pipe 16 is not hindered from coming off from the booster side bracket 21 and coming off.
A spring receiving arm 163 protrudes in the middle of the rotating shaft 16 (see FIG. 3), and a return spring 50 is engaged between this and a spring receiving piece 236 integrally coupled to the horizontal flange 231 of the stay member 23. The brake pedal 15 on the pipe 16 side is urged to rotate clockwise in FIG. 1 by the elastic force. In addition, the brake pedal 15 receives the elastic force of the return spring 50 and is placed against the lower end portion 194 (see FIG. 1) that also serves as a stopper, so that the backward movement is suppressed.

As shown in FIGS. 1 and 4, a rear end portion (one end portion) 191 of the interference bracket 19 is fixed to the rear end portion 223 of the pedal side bracket 22, and the vicinity of the projecting portion 161 of the pipe 16. Is provided with a front end portion (other end portion) 192 of the interference bracket 19. As shown in FIG. 4, the front end 192 of the interference bracket 19 is formed in a shape that follows the shape of the pipe 16 in the circumferential direction.
The interference bracket 19 is provided with a reinforcing rib 193 formed so as to protrude in the front direction of the drawing in FIG. Further, the lower end portion 194 of the interference bracket 19 forms a stopper portion that is placed against the brake pedal 15 and restricts rotation in the event of a collision. The lower end portion 194 is provided with a brake lamp switch 32. Yes.

As shown in FIG. 1, a guide plate (guide member) 31 is fixed to the dash cross member 13, and this guide plate 31 is interposed between the dash cross member 13 and the interference bracket 19. Yes. Further, the guide plate 31 is fixed to the dash cross member 13 and the vehicle rearward from a position close to the rear end 191 of the interference bracket 19 formed integrally with the fixing member 33. The sliding member 34 extends obliquely downward.
As shown in FIG. 4, the sliding member 34 includes a central side wall portion 341 and a vehicle width outer side wall portion 343 that are erected opposite to each other, and a bottom portion 342 that connects these wall portions 341 and 343. The cross section is substantially U-shaped and formed integrally. The sliding member 34 is arranged so that the opening between the wall portions 341 and 343 faces the interference bracket 19. In addition, the wall portions 341 and 343 are erected so as to extend in the front-rear direction X of the vehicle. In particular, the center side wall portion 341 is outward in the vehicle width direction Y toward the rear side of the vehicle 1 (see FIG. It is formed obliquely so as to approach the middle left side (that is, away from the vehicle center side).

Therefore, when a collision occurs in front of the vehicle 1, the interference bracket 19 comes into contact with the sliding member 34 of the guide plate 31 and then forcibly moves downward while sliding with respect to the sliding member 34. Pushed down (see arrow D in FIG. 1), and further abutted against the inclined portion ds (see FIG. 4) of the central side wall portion 341 and twisted to the outer side of the vehicle width (see the two-dotted line and reference sign dh in FIG. 4). Displace as follows.
Next, the operation of the brake pedal support structure according to an embodiment of the present invention will be described.

During steady running, the brake pedal 15 is pivotally supported via the pipe 16 in the holes 212 and 222 forming the left and right pivotal support portions of the support member bracket 14 integrally attached to the dash panel 12. During such steady running, the brake pedal 15 abuts against the lower end portion 194 of the interference bracket 19 by the elastic force of the return spring 50 and is held at a steady position as shown in FIG.
When the brake pedal 15 receives the driver's depressing operation force in a timely manner, in conjunction with this, the booster connecting arm 17 integrated with the pipe 16 brakes the brake booster 18, and a brake system (not shown) is correspondingly operated. Brakes.

At this time, the pedaling force of the brake pedal 15 and the operation reaction force from the push rod 181 of the brake booster 18 are applied to the left and right holes 212 and 222 of the support member bracket 14 via the booster connecting arm 17. At this time, the booster side bracket 21 and the pedal side bracket 22 are integrally coupled to each other by the front board portion 25, the stay member 23, and the second reinforcing member 41 to form a substantially rectangular frame shape and ensure sufficient rigidity. And durability is secured. For this reason, even if the depression force of the brake pedal 15 and the operation reaction force of the brake booster 18 are repeatedly applied, a steady braking operation of the brake pedal 15 can be performed with high durability.
Note that during such steady running, as shown in FIGS. 3A and 4, the rear end 191 of the interference bracket 19 and the bottom 342 of the sliding member 34 are opposed to each other while maintaining a predetermined distance α. ing.
On the other hand, when the front of the vehicle 1 collides and the overloaded dash panel 12 is displaced rearward, the support member bracket 14 is also displaced rearward. Further, as indicated by an arrow D in FIG. The interfering bracket 19 integrated with is also displaced rearward.

At this time, the rear end portion 191 of the interference bracket 19 comes into contact with the bottom portion 342 of the sliding member 34 while being displaced closer than the state where the predetermined interval α is maintained, and the overload from the front of the vehicle 1 is caused by the dash cross member 13. Is transmitted to.
As a result, a compressive force acts on the guide plate 31, the interference bracket 19, and the pedal side bracket 22 interposed between the dash cross member 13 and the dash panel 12.
Then, the front end 192 contacts the pipe 16 and transmits the force to the front side of the pedal side bracket 22. At this time, the compressive force acting between the dash cross member 13 and the dash panel 12 promotes the buckling of the buckling portion 22b of the pedal side bracket 22, and the rear end side of the pedal side bracket 22 is deformed. prevent. Further, the interference bracket 19 that is in contact with the bottom portion 342 of the sliding member 34 is displaced downward and rearward along the bottom portion 342. At this time, the buckling deformation of the buckling portion 22b suppresses the backward movement of the brake pedal 15 that contacts the lower end portion 194 on the pedal side bracket 22 side.

  Further, the interference bracket 19 abuts against the inclined portion ds of the central side wall portion 341 as shown by an arrow dh in FIG. 4 and is forcibly displaced outward in the vehicle width direction Y, and is integrated with the pedal side bracket. 22 and the rotating shaft 16 are also displaced so as to be twisted outward in the vehicle width direction Y.

In addition to this, in particular, when the second reinforcing member 41 having the front end flange portion 412 fixed to the dash panel 12 is subjected to an overload and is displaced backward, the booster side bracket (second support member) that is integrally coupled thereto. Member) 21 is forcibly displaced rearward (downward in FIG. 3B), which is a direction away from pedal side bracket (first support member) 22. That is, the function of suppressing the displacement of the booster side bracket 21 of the second reinforcing member 41 in the vehicle width direction Y works.
In this respect, the distance between the pedal side bracket (first support member) 22 and the booster side bracket (second support member) 21 is increased to the interval La.
In addition, at this time, as shown in FIG. 3 (b), the defect as the weakened portion formed at the deepest portion of the rear notch 231a on the horizontal flange 231 formed in the substantially U shape of the stay member 23. The part c1 functions as a stress concentration part and functions so as to be easily bent and displaced.

Thereby, the space | interval between the pedal side bracket (1st support member) 22 and the booster side bracket (2nd support member) 21 integrally joined with the both sides of the stay member 23 (reinforcing member) expands more, Expansion to La is allowed.
In this way, when the dash panel 12 and the support member bracket 14 are displaced rearward due to the overload P0 from the front of the vehicle 1, the pedal-side bracket 22 and the booster-side bracket 21 are enlarged and displaced relative to each other by increasing the relative distance. As a result, the pipe 16 integrated with the brake pedal 15 supported by the pedal side bracket 22 and the booster side bracket 21 can be actively dropped downward (the back side in FIG. 9), and the brake pedal can be configured with a simple configuration. 15 retreats can be reliably suppressed.

  Thus, according to the brake pedal support structure according to the embodiment of the present invention, the booster side bracket 21 and the pedal side bracket 22 constituting the support member bracket 14 are mutually connected by the stay member 23 and the second reinforcing member 41. Since they are integrally coupled to ensure sufficient coupling rigidity, steady brake pedal operations and braking operations can be performed with high durability. Further, when the front of the vehicle 1 collides, the displacement restraining function of the booster side bracket 21 of the second reinforcing member 41 in the vehicle width direction Y and the horizontal flange 231 formed in the substantially U shape of the stay member 23 are Since the bending displacement function of the missing part c1 formed in the deepest part of the rear notch part 231a of the rear side of the rear notch part 231a works, the relative distance between the pedal side bracket 22 and the booster side bracket 21 can be easily expanded to La. Thereby, the pipe (rotating shaft) 16 integrated with the brake pedal 15 supported by the pedal-side bracket 22 and the booster-side bracket 21 can be actively dropped (see FIG. 3B and FIG. 9). Thus, the backward movement of the brake pedal can be reliably suppressed with a simple structure, and the backward movement of the brake pedal can be reliably suppressed with a simple structure.

Further, when the front of the vehicle 1 collides and the interference bracket 19 is displaced rearward, the rear end 191 of the interference bracket 19 is moved downward along the bottom 342 of the sliding member 34. Therefore, it is possible to forcibly displace the brake pedal 15 and further reliably suppress the backward movement of the brake pedal 15.
In the brake pedal support structure of the first embodiment described above, the deficient portion c1 is formed at the deepest portion of the rear notch 231a on the horizontal flange 231a of the stay member 23. However, depending on the case, FIG. As shown in FIG. 5B, the brake pedal support structure according to the second embodiment is formed by forming the missing portions ca and cb at the deepest portion of the rear cutout portion 231a of the stay member 23a by a predetermined amount apart from each other. You may do it. In this case, the brake pedal support structure of the second embodiment is the same as the first embodiment except that the rear notch 231a has left and right missing portions ca and cb, respectively. Here, the description of the parts of the second embodiment that overlap the first embodiment is omitted.
Here, the right defect portion cb is formed in the same manner as the defect portion c1 of the first embodiment. On the other hand, the left deficient portion ca is formed such that the width d1 of the cut opening is relatively narrower than the width d2 in the cut direction of the right deficient portion cb.

  In such a brake pedal support structure of the second embodiment, it is assumed that the front of the vehicle 1 collides, receives an overload, and the dash panel 12 and the support member bracket 14a are displaced rearward. Also in this case, as in the case of the first embodiment, the function of suppressing the displacement of the booster side bracket 21 of the second reinforcing member 41 in the vehicle width direction Y works and is formed at the deepest portion of the rear notch 231a of the stay member 23a. Both the left and right defect portions ca and cb are enlarged and displaced in the opening width. Thereby, it becomes easier to displace the booster side bracket 21 backward with respect to the pedal side bracket 22. At the same time, the booster side bracket 21 is easily displaced rearward with respect to the pedal side bracket 22 by bending and displacing the left flange portion ca of the horizontal flange portion 231a so that the cut opening is enlarged. In this way, the left and right missing portions ca and cb are simultaneously deformed, whereby the relative distance between the pedal side bracket 22 and the booster side bracket 21 can be easily increased from L1 to Lb. For this reason, the pivot shaft 16 integrated with the brake pedal 15 supported by the pedal side bracket 22 and the booster side bracket 21 is positively dropped (see FIGS. 5B and 9), and the brake pedal 15 is moved backward. Can be suppressed, and the reverse of the brake pedal can be reliably suppressed.

  In the brake pedal support structures of the first and second embodiments described above, the rear notch 231a is formed in a substantially U shape on the horizontal flanges 231 and 231a of the stay members 23 and 23a. The rear notch 231a may be eliminated, a straight horizontal flange (not shown) may be used, and a missing part c1 or a missing part equivalent to the left and right missing parts ca and cb may be formed at the rear edge. The configuration can be simplified.

  Further, in the horizontal flange 231 in the brake pedal support structure of the first and second embodiments, the missing portion c1 and the left and right missing portions ca and cb are formed in an arc shape as a weak portion at the rear edge. However, instead of this, as shown in FIGS. 6A to 6C, a fragile portion formed of a triangular-shaped defect portion c2, a triangular protruding bead c3, or a fragile portion formed of an arc-shaped protruding bead c4. The shape of the part may be modified as appropriate, and in these cases, the same effects as those obtained with the brake pedal support structure of FIG. 1 can be obtained.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 Vehicle 12 Dash Panel 13 Deck Cross Member 15 Brake Pedal 16 Rotating Shaft 17 Lever Member 18 Brake Booster 19 Interference Bracket (Contact Member)
21 Booster side bracket (second support member)
22 Pedal side bracket (first support member)
23, 23a Stay member (reinforcing member)
231 Horizontal flange 31 Guide plate (guide member)
34 Sliding member 341 Central side wall 342 Bottom 343 Vehicle width outer side wall 41 Second reinforcing member 411 Side edge flange (side edge)
412 Front end flange (front end)
c1 missing part X longitudinal direction Y vehicle width direction

Claims (6)

A dash panel that forms the front wall of the vehicle compartment;
A brake pedal operated by a driver of the vehicle;
A brake booster disposed farther toward the vehicle width center than the brake pedal;
A pivot shaft connecting the brake pedal and the brake booster;
A first support member fixed to the dash panel in the vicinity of the brake pedal and rotatably supporting one end of the pivot shaft;
A second support member fixed to the dash panel in the vicinity of the brake booster and rotatably supporting the other end side of the rotation shaft;
A reinforcing member having one side coupled to the first support member and the other side coupled to the second support member and having a front end fixed to the dash panel;
The reinforcing member is formed with a rear notch that is open to the rear of the vehicle at the rear edge and a fragile portion is formed at the rear notch,
A side edge of the second reinforcing member is coupled to the wall surface opposite to the wall surface to which the reinforcing member is coupled to the second supporting member, and a front end portion of the second reinforcing member is fixed to the dash panel.
Brake pedal support structure characterized by that.   The brake pedal support structure according to claim 1, wherein in the vehicle width direction, the fragile portion is formed closer to the brake pedal than a center of the reinforcing member.   The brake pedal support structure according to claim 1 or 2, wherein a plurality of the weakened portions are formed apart from each other in the rear notch.   The brake pedal support structure according to claim 1, wherein the fragile portion is a missing portion formed at a rear edge portion of the reinforcing member. A deck cross member extending in the vehicle width direction behind the dash panel;
A guide member fixed to the deck cross member;
A contact member that is provided at a rear end portion of the first support member and is positioned between the deck cross member and a rotation shaft of the brake pedal and contacts the guide member when the vehicle collides; ,
The guide member includes an inclined wall portion that extends in the front-rear direction of the vehicle and is formed so as to be positioned on the outer side of the vehicle width toward the rear side of the vehicle. Item 5. The brake pedal support structure according to any one of Items 1 to 4. The rotating shaft is provided with a lever member connected to the brake booster,
The brake pedal is fixed to the rotating shaft in the vicinity of the first support member and on the other end side of the first support member,
The said lever member is adjoining to the said 2nd support member, and is fixed to the said rotating shaft in the said one end part side rather than the said 2nd support member, The any one of Claims 1-5 characterized by the above-mentioned. The brake pedal support structure according to one.

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