JP4632921B2 - Brake pedal support structure - Google Patents

Description

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

2. Description of the Related Art Conventionally, a mechanism and a structure for suppressing a brake pedal from being displaced (retracted) backward when the front of a vehicle collides are known. As an example of such a technique, the technique disclosed in Patent Document 1 below is known. Is mentioned.
In Patent Document 1, beads 15 and 16 are formed on the pedal support member indicated by reference 5 in FIG. 1, and when the front of the vehicle collides, the bead is deformed to deform. The brake pedal indicated by 8 is prevented from moving backward.
JP 2004-157772 A

  Here, a structure for supporting the brake pedal 103 will be described with reference to FIGS. 6 and 7. A support member bracket 102 having walls 102a and 102b is fixed to the dash panel 101 of the vehicle 100, and a brake pedal 103 is pivotally supported by these walls 102a and 102b. Further, a stopper portion 109 is provided at the rear end portion of the support member bracket 102 for restricting the backward movement of the brake pedal 103 when the front of the vehicle 100 collides.

An interference bracket 104 is fixed to the support member bracket 102, and a guide plate 106 adjacent to the rear end of the interference bracket 104 is fixed to the deck cross member 105 extending in the width direction of the vehicle 100. Has been. Further, the support member bracket 102 is formed with a buckling point 102c which is a portion formed with low rigidity.

Further, the vehicle 100 is provided with a brake booster 107 on an extension line of the operation direction of the brake pedal 103 (see arrow A _{100 in} FIG. 6). The brake booster 107 and the brake pedal 103 are connected by a link member 108. It is connected.
Then, as indicated by an arrow A ₁₀₁ in FIG. 6, when the front of the vehicle 100 collides, the dash panel 101 is displaced rearward along with the brake booster 107, whereby the support member bracket 102 is displaced rearward. At the same time, the brake pedal 103 is also pushed by the arm member 108 and tries to turn to the vehicle rear side.
At this time, although the interference bracket 104 fixed to the support member bracket 102 is also displaced rearward, the rear end portion of the interference bracket 104 abuts against the guide plate 106 and, at the same time, the rear of the vehicle along the guide plate 106. adapted to be displaced downwardly (see arrow in FIG. 6 a _102).

Further, at this time, a compressive force generated between the guide plate 106 and the dash panel 101 acts on the interference bracket 104 and the support member bracket 102. Buckling can be generated at the buckling point 102c.
As a result of this buckling, the rear end portion side of the support member bracket 102 is displaced to the front side of the vehicle, and the brake pedal 103 abuts against the stopper portion 109 so that the rotation of the brake pedal 103 to the vehicle rear side is suppressed. The

With such a structure, conventionally, when a collision occurs in front of the vehicle 100, the brake pedal 103 is prevented from moving backward.
However, depending on the type of vehicle, the arrangement position of the brake booster may be limited due to its layout space or function. As shown in FIGS. 6 and 7, the brake booster 107 is connected to the brake pedal 103. In some cases, it cannot be disposed on the extended line in the operation direction.

Here, FIG. 8 shows a brake pedal support structure 120 as a technique studied in the midst of creating the present invention. The brake pedal support structure 120 is configured assuming a case where the brake booster and the brake pedal are disposed apart from each other.
In the brake pedal support structure 120 shown in FIG. 8, the position of the brake booster 121 is offset from the extension line in the operation direction of the brake pedal 103 to the left side in FIG.

Further, the brake pedal 103 is fixed to one end portion side (right side in FIG. 8) of the shaft 122 that is pivotally supported by the wall portions 102a and 102b of the support member bracket 102.
Further, an arm portion 123 connected to the brake booster 121 is fixed to the other end portion side (the left side in FIG. 8) of the shaft 122. The brake pedal 103 and the brake booster 121 are connected to the shaft 122 and the arm portion 123. Are connected through.

However, in the brake pedal support structure 120 shown in FIG. 8, it is difficult to provide the interference bracket 104 shown in FIGS.
That is, when the interference bracket 104 is fixed only to the wall portion 102 b close to the brake pedal 103, when the front of the vehicle 100 collides, the support is generated by the compressive force generated between the guide plate 106 and the dash panel 101. Before buckling occurs at the buckling point 102c formed on the member bracket 102, the rear end portion of the wall 102b together with the interference bracket 104 is easily deformed, and does not buckle at the buckling point 102c.

For this reason, the rear end side of the wall 102b is not displaced forward, and the brake pedal 103 cannot be prevented from retreating.
On the other hand, when both ends of the interference bracket 104 are fixed to both the wall portion 102a and the wall portion 102b of the support member bracket 102, the interference bracket 104 is enlarged, so that a limited space in the vehicle is effective. In other words, there is a problem in that it cannot be used for a long time, the cost is increased, and the weight is increased.

  The present invention has been devised in view of such problems, and even when the front of the vehicle collides, the brake pedal support structure can suppress the brake pedal from retreating with a simple configuration. The purpose is to provide.

In order to achieve the above object, a brake pedal support structure for a vehicle according to the present invention (Claim 1) extends in the vehicle width direction behind the dash panel constituting the front wall of the vehicle compartment of the vehicle and the dash panel. A deck cross member, a brake pedal operated by a driver of the vehicle, and a first support fixed to the dash panel in the vicinity of the brake pedal and rotatably supporting one end side of a rotating shaft of the brake pedal A member, a second support member that is fixed to the dash panel so as to be farther from the brake pedal than the first support member, and rotatably supports the other end side of the rotation shaft, and the first support member provided at a rear end portion of the extending in the longitudinal direction it is located between the rotation axis of the deck cross member and the brake pedal, the deck cross upon frontal collision of the vehicle A contact member you contact with the rotating shaft abuts against the Nba, before Symbol provided below the rotary shaft at the lower end of the abutment member, the retraction of the brake pedal during a frontal collision of the vehicle A stopper portion that regulates, and a groove shape that is formed in a part of the first support member and is recessed toward the opposite side of the second support member, than the pivot shaft of the brake pedal and the contact member And a low-rigidity portion having a low rigidity and formed on the front side of the vehicle with respect to the rotation shaft.

According to a second aspect of the present invention, there is provided the vehicle brake pedal support structure according to the first aspect, wherein the low-rigidity portion is fan-shaped from the vicinity of the center in the vertical direction of the first support member downward. It is characterized by a widening groove.
According to a third aspect of the present invention, there is provided the brake pedal support structure for a vehicle according to the first or second aspect of the present invention, wherein the pivot shaft of the brake pedal projects through the first support member. The abutting member extends from one end fixed to the first support member to the cross member, and then is folded back so that the other end extends to a position close to the protrusion. It is characterized by that.

  According to a fourth aspect of the present invention, there is provided a brake pedal support structure for a vehicle according to the present invention, wherein the vehicle is provided with a brake booster that assists the operation of the brake pedal. In addition, the brake booster is disposed offset in the vehicle width direction with respect to the brake pedal, and is integrally fixed to a rotating shaft of the brake pedal, and the operating force of the brake pedal is transmitted to the brake booster. It is characterized by comprising an arm member for transmitting to the armature.

According to a fifth aspect of the present invention, in the brake pedal support structure for a vehicle according to the present invention, the deck cross member and the abutting member are connected to each other at the time of a forward collision of the vehicle. A guide member is provided which is fixed to the deck cross member at a contact position and extends obliquely downward in the rear of the vehicle.

According to the brake pedal support structure of the present invention, when the front of the vehicle collides, not only the rear end portion of the first support member but also the abutting member generates the compressive force generated between the dash panel and the deck cross member. Further, since it can also be supported by the pivot shaft of the brake pedal, this force can be reliably transmitted to the low-rigidity portion formed on the front side of the first support member, and the low-rigidity portion can be deformed. Therefore, even when the first support member and the second support member are separated from each other, the brake pedal can be prevented from retreating with a simple configuration. (Claim 1)
In addition, since the low-rigidity portion is formed as a groove portion that is wider toward the bottom, it is possible to increase the amount of deformation below the groove portion at the time of a collision in front of the vehicle, and positively advance the lower end side of the brake pedal. By doing so, the reverse of the brake pedal can be suppressed more effectively. (Claim 2)
Further, even when there is no space between the first support member and the second support member to bring the front end portion of the contact member close to the rotation axis of the brake pedal, the first support member protrudes from the first support member. The compression force generated between the dash panel and the deck cross member at the time of a vehicle front collision is provided by arranging the rear end portion of the compression force transmission member close to the protruding portion that is the pivot shaft of the brake pedal. Can be reliably transmitted to the low-rigidity portion of the first support member via the contact member and the protruding portion. (Claim 3)
Further, since the brake booster is provided offset in the vehicle width direction with respect to the brake pedal, it is possible to avoid a situation where the brake booster that has moved backward due to a collision in front of the vehicle pushes back the brake pedal. In addition, since the arm member is fixed integrally to the rotation shaft of the brake pedal, the operating force of the brake pedal can be reliably transmitted to the brake booster side even when the brake booster is in the offset position. Can do. (Claim 4)
Also, when the front of the vehicle collides and the contact member is displaced rearward, the contact member is forcibly displaced along the guide member extending obliquely downward in the rear of the vehicle. The deformation of the low-rigidity portion of the first support member is promoted, and the brake pedal can be prevented from retreating more reliably. (Claim 5)

Hereinafter, a support structure for a brake pedal according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing the overall configuration, and FIG. 2 is a schematic front view showing the overall configuration. 3 is a schematic perspective view showing the overall configuration, FIG. 4 is a schematic side view showing the main configuration, and FIG. 5 is a schematic YY sectional view of FIG.
As shown in FIGS. 1, 2, and 3, the vehicle 1 is provided with a dash panel 12 that is a part of the vehicle body and forms the front surface of the passenger compartment 11, and extends in the width direction of the vehicle 1. A deck cross member 13, which is a pipe material forming the vehicle body, is provided behind the dash panel 12.

  Further, a support member bracket (rotation support member) 14 is fixed to the dash panel 12, and a pipe member (brake pedal rotation shaft) 16 to be described later is pivotally supported by the support member bracket 14. . A brake pedal 15 is fixed to the pipe member 16, and the brake pedal 15 can be rotated within a predetermined range with the pipe member 16 as a rotation axis by a stepping operation by a driver. ing.

The support member bracket 14 includes a booster side bracket (second support member) 14B and a pedal side bracket (first support member) 14C, and one end portion 14a thereof is fixed to the dash panel 12. Has been.
In addition, circular holes 14d and 14d are formed in the booster side bracket 14B and the pedal side bracket 14C, respectively. The bushes 14f and 14f are fitted into the holes 14d and 14d, and the pipe 16 is inserted into the bushes 14f and 14f, so that the pipe 16 is connected to the booster side bracket 14B and the pedal side bracket. It is rotatably supported by 14C.

  The pedal-side bracket 14C is formed with a groove-like buckling portion (low-rigidity portion) 14e that is recessed toward the opposite side of the booster-side bracket 14B, thereby partially reducing the rigidity of the pedal-side bracket 14C. ing. The buckling portion 14e is formed so as to be lower than the rigidity in the radial direction of the pipe 16, and is also formed so as to be lower than the rigidity of an interference bracket (contact member) 19 described later. It has become so. The buckling portion 14e is formed so as to expand in a fan shape from the vicinity of the center in the vertical direction of the pedal-side bracket 14C. When the front of the vehicle 1 collides, the groove portion 14e is deformed and seated. It is possible to cause bending.

A stay member 23 is interposed between the booster side bracket 14B and the pedal side bracket 14C, so that the rigidity of the booster side bracket 14B and the pedal side bracket 14C can be increased to prevent deformation.
In the pipe 16, a booster connecting arm (arm member) 17 is fixed in the vicinity of the left end portion (the other end portion) and on the right side of the booster side bracket 14B, and in the vicinity of the right end portion (one end portion). A brake pedal 15 is fixed to the left side of the pedal side bracket 14C.

Further, as shown in FIG. 2, the pipe 16 is disposed so as to slightly protrude to the right side from the hole 14d of the pedal side bracket 14C. A portion of the pipe 16 that protrudes to the right side of the pedal side bracket 14C is referred to as a protruding portion 16a.
Further, a booster connecting arm 17 fixed to the pipe 16 is disposed in front of the vehicle 1 with respect to the brake pedal 15 so as to be offset to the left (the booster side bracket 14B side) with respect to the brake pedal 15. 18 is connected.

Further, as shown in FIG. 5, the rear end portion 14C ₁ of the pedal-side bracket 14C is fixed the rear end portion (one end portion) 19a of the interference bracket 19, also in the vicinity of the projecting portion 16a of the pipe 16 A front end (other end) 19b of the interference bracket 19 is disposed.
As shown in FIG. 4, the front end portion 19 b of the interference bracket 19 is formed in a shape along the circumferential shape of the pipe 16.
The interference bracket 19 is provided with a reinforcing rib 19d formed so as to protrude in the front direction in FIG. Further, the lower end portion 19c of the interference bracket 19 also serves as a stopper portion that contacts the brake pedal 15 and restricts rotation in the event of a collision. A brake lamp switch 22 is provided at the lower end portion 19c. ing.

A guide plate (guide member) 21 is fixed to the deck cross member so as to be interposed between the deck cross member 13 and the interference bracket 19.
The guide plate 21 is fixed to the deck cross member 13 and a rear lower portion of the vehicle 1 from a position close to the rear end portion 19a of the interference bracket 19 formed integrally with the fixing member 21A. The sliding member 21B extends obliquely in the direction.

Further, as shown in FIG. 5, the sliding member 21B has a cross section of a wall portion 21B ₁ , 21B ₁ erected opposite to each other and a bottom portion 21B ₂ connecting these wall portions 21B ₁ , 21B _1. Is formed in a substantially U-shape.
The sliding member 21B is disposed such that the opening between the wall portions 21B ₁ and 21B ₁ faces the interference bracket 19.

Since the brake pedal support structure according to the embodiment of the present invention is configured as described above, the following operations and effects are achieved.
When the front of the vehicle 1 collides and the dash panel 12 is displaced rearward, the support member bracket 14 is also displaced rearward, and the interference bracket 19 is also displaced rearward as indicated by an arrow A ₁₉ in FIG.

Then, the rear end portion 19 a of the interference bracket 19 abuts on the bottom portion 21 B ₂ of the sliding member 21 B of the guide plate 21, and the impact generated in front of the vehicle 1 is transmitted to the deck cross member 13.
Thereby, a compressive force acts on the guide plate 21, the interference bracket 19, and the pedal side bracket 14C interposed between the deck cross member 13 and the dash panel 12.

At this time, the front end portion 19b of the interference bracket 19 abuts on the protruding portion 16a of the pipe 16, and transmits the force to the front side of the pedal side bracket 14C. That is, since the compressive force acting between the deck cross member 13 and the dash panel 12 can be transmitted through the interference bracket 19 and the pipe 16 as well as the pedal side bracket 14C rear end side. Therefore, it is possible to prevent the rear end portion of the pedal side bracket 14C from being deformed before the buckling portion 14e of the pedal side bracket 14C is buckled.

The pedal-side bracket 14C to which this compressive force is applied has its buckling portion 14e preferentially buckled and deformed over other parts. At this time, interference bracket 19 in contact with the bottom 21B ₂ of the sliding member 21B of the guide plate 21, along the bottom 21B ₂ of the sliding member 21B, since the displacement to the vehicle 1 obliquely downward rearward, The buckling of the buckling portion 14e is promoted.
Due to this buckling deformation, the rear end portion side of the pedal side bracket 14C is displaced forward, so that the lower end portion 19C that also serves as a stopper abuts against the brake pedal 15 to suppress the reverse of the brake pedal 15.

Thus, according to the brake pedal support structure according to the embodiment of the present invention, the dash panel 12 and the deck cross member 13 can be used even when the distance between the pedal-side bracket 14C and the booster-side bracket 14B is large. Can be reliably transmitted to the buckling portion 14e of the pedal-side bracket 14C via the compact interference bracket 19 and the pipe member 16, and the buckling portion 14e is buckled and deformed. 15 backwards can be suppressed.

In addition, since the buckling portion 14e is formed wider toward the lower side, when a collision occurs in front of the vehicle 1, it is possible to increase the amount of deformation below the groove portion 14e, and the brake pedal 15 In particular, it is possible to more effectively suppress the backward movement of the brake pedal 15 by positively advancing the lower end portion 15a.
Further, in the pipe member 16 that is the pivot shaft of the brake pedal 15, even when there is no space for the front end portion 19b of the interference bracket 19 to be close between the pedal side bracket 14C and the booster side bracket 14B. By arranging the front end portion 19b of the interference bracket 19 in proximity to the protruding portion 16a protruding from the pedal side bracket 14C, the vehicle 1 can be moved between the dash panel 12 and the deck cross member 13 when the vehicle 1 collides forward. The generated compressive force can be reliably transmitted to the buckling portion 14e of the pedal-side bracket 14C through the interference bracket 19 and the protruding portion 16a of the pipe member 16 that is the rotation shaft of the brake pedal 15.

In addition, since the brake booster 18 is offset with respect to the brake pedal 15 in the vehicle width direction, it is possible to avoid a situation in which the brake booster 18 that has moved backward due to a collision with the front of the vehicle 1 pushes back the brake pedal 15. And can contribute to further improvement of safety.
In addition, since the booster connecting member 17 is integrally fixed to the pipe member 16 that is the pivot shaft of the brake pedal 15, even if the brake booster 18 is in the offset position, the operation force of the brake pedal 15 is reliably braked. also transmitted to the booster 18, the front of the vehicle 1 collides, when the interference bracket 19 is displaced rearward, the rear end portion 19a of the interference bracket 19, along the bottom 21B ₂ of the sliding member 21B Thus, the vehicle 1 can be forcibly displaced rearward and obliquely downward, and the reverse of the brake pedal 15 can be more reliably suppressed.

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.
In the embodiment described above, the rear end portion 19a of the interference bracket 19 at the rear end 14C ₁ of the pedal-side bracket 14C is fixed, also the protrusions 16a near the pipe 16 the front end of the interference bracket 19 Although the case where the part 19b is provided has been described as an example, the present invention is not limited to such a configuration.

  For example, the front end portion 19b of the interference bracket 19 may be configured to be close to the pipe 16 between the pedal side bracket 14C and the booster side bracket 14B instead of the protruding portion 16a of the pipe 16.

It is a typical side view showing the whole support structure of a brake pedal concerning one embodiment of the present invention. It is a typical front view showing the whole brake pedal support structure concerning one embodiment of the present invention. It is a typical perspective view showing the whole brake pedal support structure concerning one embodiment of the present invention. It is a typical side view showing the important section of the support structure of a brake pedal concerning one embodiment of the present invention. It is typical sectional drawing which shows the principal part of the support structure of the brake pedal which concerns on one Embodiment of this invention, Comprising: The YY cross section of FIG. 4 is shown. It is a typical front view which shows the principal part of the support structure of the conventional brake pedal. It is a typical side view which shows the principal part of the support structure of the conventional brake pedal. It is a typical front view showing the support structure of a brake pedal examined in the process of creating the present invention.

Explanation of symbols

1 Vehicle 12 Dash Panel 13 Deck Cross Member 14B Booster Side Bracket (Second Support Member)
14C Pedal side bracket (first support member)
14e Buckling part (low rigidity part)
15 Brake pedal 16 Pipe member (rotating shaft)
16a Protrusion 18 Brake booster (brake booster)
19 Interference bracket (contact member)
19b Front end of interference bracket (the other end of the contact member)
19c Lower end of interference bracket (stopper member)
21 Guide plate (guide member)

Claims (5)

A dash panel that forms the front wall of the vehicle compartment;
A deck cross member extending in the vehicle width direction behind the dash panel;
A brake pedal operated by a driver of the vehicle;
A first support member fixed to the dash panel in the vicinity of the brake pedal and rotatably supporting one end side of a rotation shaft at the upper end of the brake pedal;
A second support member which is fixed to the dash panel and spaced apart from the brake pedal than the first support member, and rotatably supports the other end side of the rotation shaft;
Provided at the rear end of the first support member, extending to the front-rear direction position between the rotation axis of the deck cross member and the brake pedal, the deck cross member when a forward collision of the vehicle a contact member you contact with the rotating shaft abuts against,
Before SL provided below the rotary shaft at the lower end of the contact member, and a stopper portion for restricting the retreat of the brake pedal during a frontal collision of the vehicle,
A groove formed in a part of the first support member and recessed toward the opposite side of the second support member, having a lower rigidity than the pivot shaft of the brake pedal and the contact member; A brake pedal support structure for a vehicle, comprising: a low-rigidity portion formed on the vehicle front side with respect to the rotation shaft. The brake pedal support structure for a vehicle according to claim 1, wherein the low-rigidity portion is a groove portion that expands in a fan shape from the vicinity of the center in the vertical direction of the first support member downward. The pivot shaft of the brake pedal has a protruding portion that protrudes through the first support member,
The contact member extends from the one end side fixed to the first support member to the cross member side and then is folded back so that the other end side extends to a position close to the protruding portion. The brake pedal support structure for a vehicle according to claim 1 or 2. The vehicle is provided with a brake booster that assists the operation of the brake pedal,
The brake booster is arranged offset in the vehicle width direction with respect to the brake pedal,
The vehicle according to any one of claims 1 to 3, further comprising an arm member that is integrally fixed to a rotation shaft of the brake pedal and transmits an operation force of the brake pedal to the brake booster. Brake pedal support structure. A guide member is provided that is fixed to the deck cross member at a position where the deck cross member and the contact member come into contact with each other at the time of a frontal collision of the vehicle and extends obliquely downward in the rear of the vehicle. The brake pedal support structure for a vehicle according to any one of claims 1 to 4.

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