JP2006273023A - Pedal support structure of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the limitation on the strength of each member, and surely drop a pedal in the case of collision. <P>SOLUTION: The pedal support structure is equipped with a bracket 3 for holding a support shaft holding a pedal support shaft 10, a lock part which detachably locks the bracket for holding the support shaft with the bracket for holding the support shaft relatively moving to the front of a vehicle body, and a pedal bracket 2 having a guide surface extending to the longitudinal direction of the vehicle body. Furthermore, the bracket 3 for holding the support shaft is provided with a support part detachably supported on the lock part, a lever shaped abutting part 37 which is provided at the rear part of the lock part, and abuts to the vehicle body member when being extended to the upper direction and relatively moved to the rear part, and a guide part abutting to the approximately horizontal guide surface formed on the pedal bracket. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pedal support structure for an automobile, and more particularly to a pedal support structure for dropping a pedal in the event of a vehicle collision.

  Generally, in the event of a car collision, the driver tries to brake the car by stepping on the brake pedal to avoid the collision, but if the car nevertheless crashes without stopping, the brake pedal is depressed. It will collide.

  In such a case, the front part of the vehicle body collapses while absorbing the collision energy with the collision, and the engine arranged in the engine room moves backward while pushing the master cylinder of the brake device located on the rear side. Since the brake pedal located on the rear side of the dash panel is connected to the master cylinder via an operating rod, the brake pedal is also pushed through the operating rod to move backward as the master cylinder moves to the rear of the vehicle body. Become.

  As a result, when the driver is stepping on the brake pedal at the time of a collision, a collision load acts on the driver's feet, causing a large kickback and impacting the driver's feet.

  In order to cope with such a problem, a structure in which the brake pedal is dropped at the time of a collision has been conventionally proposed.

  For example, Patent Document 1 includes a first bracket fixed to a dash panel and a second bracket fixed to the first bracket, and the first bracket is provided with a longitudinal groove-shaped guide portion, while the second bracket Discloses a structure in which a lateral groove-shaped guide portion is provided, and a support shaft of an operation pedal is inserted into a portion where the vertical groove-shaped guide portion and the lateral groove-shaped guide portion overlap to be swingably supported.

  In this pedal support structure, the first bracket is deformed by being crushed during a frontal collision of the automobile to move the second bracket backward, thereby moving the support pedal shaft relatively forward in the lateral groove-shaped guide portion. Then, it is made to fall down along the longitudinal groove-shaped guide portion.

  Further, in Patent Document 2, a bracket having a notch groove that is attached to the dash panel and extends downward, a pedal rotation shaft that is disposed at a predetermined position of the notch groove and rotatably supports the pedal, and the bracket is substantially omitted. There is disclosed a pedal dropping mechanism having a lever-like actuating member that is rotatably supported by a support shaft that is substantially parallel to the pedal rotation shaft at the center.

In this pedal dropping mechanism, when the vehicle body collides and the dashboard receives a rearward force, the front end of the actuating member rotates upward, and accordingly the rear end rotates downward to rotate the pedal rotation shaft. It is made to fall along a notch groove.
Special Table 2000-504654 Japanese Patent No. 3165385

  However, since the pedal support structure disclosed in Patent Document 1 is based on the premise that the first bracket is crushed and deformed at the time of a frontal collision of the automobile, it is necessary to relatively reduce the strength of the first bracket.

  In contrast, in order to improve the driver's operability during normal times other than the front collision, it is necessary to firmly support the support pedal shaft, and it is preferable to relatively increase the strength of the first bracket.

  As described above, the first bracket needs to have both a strength that reliably supports the support shaft of the operation pedal and a strength that allows the deformation of the operation pedal. There is a possibility that it may cause a drop in performance or dropout performance at the time of a front collision.

  On the other hand, in the pedal dropping mechanism disclosed in Patent Document 2, a large force is applied to the rotating shaft of the lever-like actuating member at the time of collision. At this time, the operating member and the cutout groove need to be strong enough not to be deformed.

  For this reason, the strength of the operating member, the bracket, and the notch groove is limited, and depending on the direction of the force received at the time of collision, the parts may be deformed and the pedal may not fall as intended. Furthermore, since various forces act on each member in a short time at the time of actual collision, there is a possibility that the drop-off performance may be deteriorated.

  The present invention has been made to solve the above-described problems of the prior art, and the object of the present invention is to reduce the restriction on the strength of each member and to reliably drop the pedal at the time of collision. There is to do.

In order to achieve the above object, a pedal support structure for a vehicle according to the present invention is a pedal support structure for a vehicle that supports a pedal disposed on the interior side of a dash panel in a swingable manner.
A support shaft holding bracket for holding the pedal support shaft;
A front end is fastened to the dash panel, and a locking portion for releasably locking the support shaft holding bracket by the relative movement of the support shaft holding bracket to the front of the vehicle body and a guide surface extending in the longitudinal direction of the vehicle body A pedal bracket having
The support shaft holding bracket is
A support portion removably supported by the locking portion;
A lever-like contact portion that is provided behind the locking portion and extends upward and relatively moves backward;
And a guide portion that abuts on a substantially horizontal guide surface formed on the pedal bracket.

  According to this configuration, when the dash panel is retracted due to a collision, the support portion can be reliably detached from the locking portion by moving the support shaft holding bracket in the horizontal direction by the action of the guide surface and the guide portion. In addition, since this horizontal movement is caused by an impact at the time of a collision, deformation due to stress concentration can be mitigated, and the pedal can be smoothly dropped off.

  The abutting portion may be disposed rearward from the rear end of the pedal bracket by a first predetermined distance.

  According to this configuration, since the support shaft holding bracket is disposed at a first predetermined distance from the rear end of the pedal bracket, the guide portion and the guide surface are moved during the movement of the first predetermined distance. By this action, the support shaft holding bracket moves horizontally, and the support portion can be reliably detached from the locking portion. Furthermore, after the contact portion contacts the rear end of the pedal bracket, the contact portion acts as a fulcrum, and a force that separates the support shaft holding bracket downward due to a large rotational moment acts. Even if each bracket is deformed, the pedal can be reliably dropped by a large force.

  In the above configuration, the pedal bracket has a guide surface below the locking portion, and a second predetermined distance smaller than the first predetermined distance on the vehicle front side from the locking portion. A displacement restricting surface that restricts forward relative movement may be provided.

  According to this configuration, in a state where the support shaft holding bracket is relatively moved forward by the second predetermined distance, the support portion is detached from the locking portion, and in this state, the forward relative movement is restricted. Rotational motion with the guide surface as a fulcrum can be generated in the support shaft holding bracket, and the support shaft holding bracket can be more reliably dropped.

  The rear end portion of the guide portion may be located on the front side of the vehicle body from the contact portion.

  According to this configuration, since the guide portion is positioned in front of the vehicle body relative to the contact portion, the downward rotation of the support shaft holding bracket when the contact portion contacts the vehicle body member is restricted, and the horizontal direction It becomes easy to displace, and a support part becomes easy to detach | leave from a latching.

  In the above configuration, the guide portion may be located on the vehicle body rear side from the support portion and on the vehicle body front side from the contact portion.

  According to this configuration, since the guide portion is in front of the contact portion, the support portion can be easily detached from the locking portion, and the guide portion serving as a fulcrum is located in front of the support portion so that the support shaft holding bracket is located. It is possible to prevent it from becoming difficult to drop down.

  An edge may be provided at the rear end of the guide portion.

  According to this configuration, the position where the guide portion becomes a fulcrum can be optimized while securing the overall size which is essential for securing the strength, and the support shaft holding bracket is used with the rear end of the guide portion as a fulcrum. It can be easily rotated.

  The locking portion is configured by a part of a peripheral surface portion of an opening provided on both side walls of the pedal bracket, and an opening portion is provided below the locking portion of the opening on the front side of the vehicle body. Also good.

  According to this configuration, the shape of the opening is devised and the locking portion and the opening portion are provided, so that the processing becomes simple.

  Said structure WHEREIN: The said open part may be provided in the said guide surface.

  According to this configuration, since the opening portion can be configured not only in the downward direction but also in the lateral direction, the support shaft holding bracket can be more reliably dropped off.

  The contact portion may be provided continuously on at least one side surface of the support shaft holding bracket in the vehicle width direction.

  According to this configuration, by providing the contact portion continuously on one side surface of the support shaft holding bracket, the support shaft holding bracket can be applied with a load applied to the contact portion without increasing the strength of the support shaft holding bracket. Can be prevented from being deformed.

  The guide surface may be inclined downward in the outer direction of the vehicle body as viewed from the front.

  According to this configuration, the force with which the guide portion abuts on the guide surface acts so as to expand the pedal bracket, and friction caused by interference between the support shaft holding bracket and the pedal bracket is reduced. The drop-out operation due to movement and rotation can be made smooth.

  The support shaft holding bracket may have a slit extending in the longitudinal direction of the vehicle body along the guide portion.

  According to this configuration, the force of the guide portion abutting against the guide surface tends to narrow the width direction of the support shaft holding bracket due to the action of the slit, so that friction caused by interference between the support shaft holding bracket and the pedal bracket is reduced. It can be reduced, and the dropping operation by horizontal movement and rotation of the support shaft holding bracket can be made smooth.

  It further includes a fork bracket that is fixed to the pedal bracket and supported so as to be slidable forward of the vehicle body in the event of a collision, and the fork bracket restricts the support portion from moving in the front-rear direction. And a second contact portion that contacts the vehicle body member at a position behind the vehicle body from the contact portion.

  According to this configuration, since the forward relative movement of the support portion is restricted by the fork bracket, stability of pedal operation in a normal state can be secured, and displacement of the support portion can be restricted by sliding the fork bracket at the time of collision. Since the is released, the pedal is reliably retracted in the event of a collision. Further, since the support shaft holding bracket is fixed to the pedal bracket by the fork bracket, there is no need to separately provide a part for fixing the support shaft holding bracket to the pedal bracket, and the support shaft holding bracket can be displaced and dropped more reliably. I can do it.

  According to the present invention, when the dash panel is retracted due to a collision, the support portion can be reliably detached from the locking portion by moving the support shaft holding bracket in the horizontal direction by the action of the guide surface and the guide portion. In addition, since this horizontal movement is caused by an impact at the time of a collision, deformation due to stress concentration can be mitigated, and the pedal can be smoothly dropped off.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the constituent elements described in this embodiment are merely examples, and are not intended to limit the scope of the present invention only to them.

  FIG. 1 is a side view of a brake pedal assembly including a brake pedal support structure as an embodiment of an automobile pedal support structure according to the present invention, and FIG. 2 is a perspective view of the brake pedal assembly of FIG.

  1 and 2, 1 is a master cylinder of a brake attached to the inside of the dash panel, 2 is a pedal bracket fastened to the master cylinder 1, and 3 is a spindle that holds the spindle of the brake pedal 5 together with the pedal bracket 2. A holding bracket, 4 is a fork bracket attached to the upper part of the support shaft holding bracket 3, 5 is a brake pedal, and 6 is an instrument panel member as a vehicle body member extending in the vehicle body width direction. Reference numeral 10 denotes a support shaft of the brake pedal 5, and 11 denotes a bolt that fixes the fork bracket 4 to the pedal bracket 2.

  In addition, the direction indicated by X in the figure is referred to as the vehicle body width direction, the direction indicated by Y is referred to as the vehicle longitudinal direction, and the direction indicated by Z is referred to as the vehicle vertical direction.

  When assembling the brake pedal assembly, the support shaft holding bracket 3 is inserted into the pedal bracket 2 in the rear lower side of the vehicle body with the support shaft 10 of the brake pedal 5 passed through the hole serving as the support portion of the support shaft holding bracket 3. The support shaft 10 is located on the rear side of the vehicle body consisting of the peripheral surface portions of the openings on both sides of the pedal bracket 2, and the guide portion of the support shaft holding bracket 3 is connected to the guide surface of the pedal bracket 2. Arrange so that they abut. In this state, the fork bracket 4 is disposed on the pedal bracket 2 so that the movement of the support shaft 10 toward the vehicle body front side is restricted by the peripheral surface on the vehicle body front side of the opening on both sides of the fork bracket 4. Then, the bolt 11 is fastened with a nut or the like through the hole on the upper surface of the fork bracket 4, the slit on the upper surface of the pedal bracket 2 and the opening on the upper surface of the support shaft holding bracket 3, and the fork bracket 4 and the support shaft holding bracket 3 are attached to the pedal bracket 2. Fix it. Finally, the pedal bracket 2 is fixed to the master cylinder 1 with four bolts.

  Note that the pedal bracket 2 may be fixed to the master cylinder last as described above or first.

  In the brake assembly, the portion including the brake pedal 5, the pedal bracket 2, the support shaft holding bracket 3 and the fork bracket 4 constitutes the pedal support structure according to the present invention.

  In the state where the brake pedal assembly is assembled in this manner, the support shaft 10 of the brake pedal 5 is moved in the vehicle body vertical direction and the vehicle body rear side by the engagement portion on the vehicle body rear side of the opening provided in the pedal bracket 2. Is restricted, and movement in the longitudinal direction of the vehicle body is restricted by the circumferential surface on the vehicle body front side of the opening provided on the side surface of the fork bracket 4. For this reason, the support shaft 10 of the brake pedal is firmly held, and the driver can operate the pedal stably.

  On the other hand, at the time of the frontal collision of the vehicle, as will be described in detail later, the dash panel and the master cylinder 1 move to the rear of the vehicle body, the entire brake pedal assembly moves to the rear side of the vehicle body, and the rear part of the fork bracket 4 is attached to the instrument panel member 6. Abut. When the brake pedal assembly further moves toward the rear of the vehicle body, the fork bracket 4 moves to the front side of the vehicle body and is detached from the pedal bracket 2 together with the bolt 11. Next, the lever-shaped contact portion of the support shaft holding bracket 3 contacts the instrument panel member 6 and is pushed to the front side of the vehicle body so that the support shaft holding bracket 3 moves relative to the pedal bracket 2 toward the front side of the vehicle body. The support portion that supports the support shaft 10 moves from the locking portion in the opening of the pedal bracket 2 to the opening portion on the front side of the vehicle body. When the abutment portion on the lever is further pushed forward by the instrument panel member 6, a rotational moment is applied to the support shaft holding bracket 3 by the action of the lever, and the support portion is inclined downward within the opening portion of the opening of the pedal bracket 2. The brake pedal 5 is dropped downward together with the support shaft holding bracket 3 from the opening portion of the opening of the pedal bracket 2.

  As a result, even when the vehicle collides with the driver stepping on the brake pedal, the brake pedal 5 is surely dropped and the burden on the driver's foot is reduced.

  Next, each member of the pedal support structure of this embodiment will be described. 3, 4, and 5 are diagrams showing in detail the structure of the pedal bracket 2, the support shaft holding bracket 3, and the fork bracket 4, in which (a) is a perspective view, and (b) is a perspective view. A top view, (c) is a front view as seen from the rear side of the vehicle body, and (d) is a side view.

  The structure of the pedal bracket 2 will be described in detail with reference to FIG. In the pedal bracket 2 of the present embodiment, an opening 22 for passing a piston rod of the master cylinder 1 and four openings 23 a to 23 d for bolts fastened to the master cylinder 1 are provided on a surface 21 fastened to the master cylinder 1. Have.

  In addition, an opening 25 having a slit 25 a opened on the front side of the vehicle body for fastening the fork bracket 4 with the bolt 11 is provided on the upper surface 24 of the pedal bracket 2. The side surfaces 26a and 26b (hereinafter also collectively referred to as 26) are formed by providing a step so that the vehicle body width direction is widened at a predetermined distance from the upper surface, and the guide portion of the support shaft holding bracket 3 is formed. Guide surfaces 28a and 28b (hereinafter also collectively referred to as 28) that abut against (described later) and extend in the longitudinal direction of the vehicle body, and a locking portion that holds the support shaft 10 of the pedal 2 on the circumferential surface on the rear side of the vehicle body. At the same time, openings 27a and 27b (hereinafter also collectively referred to as 27) in which an opening including a notch on the guide surface 28 is formed are provided on the front surface of the vehicle body and below the peripheral surface.

  In the present embodiment, the angle of the guide surface 28 is substantially the same as the horizontal direction of the vehicle body. However, the angle may be such that the outside is inclined downward in the vehicle body width direction. In this manner, the pedal bracket 2 acts so as to expand in the vehicle body width direction by the force with which the guide portion of the support shaft holding bracket 3 comes into contact with the inside of the guide surface 28, and the guide portion of the support shaft holding bracket 3 and the pedal Friction is reduced by contacting the guide surface of the bracket 2 with a line instead of a surface, and the dropping operation due to horizontal movement or rotation of the support shaft holding bracket 3 in the longitudinal direction of the vehicle body can be made smooth.

  The structure of the support shaft holding bracket 3 will be described in detail with reference to FIG. The support shaft holding bracket 3 of the present embodiment has an opening 32 on the upper surface 31 where the front side of the vehicle body for the bolt 11 is opened, and further extends upward from the upper surface 31, so that the support shaft holding bracket 3 moves to the rear side of the vehicle body. A lever-shaped contact portion 37 is provided as a portion that contacts the instrument panel member 6 when it moves.

  In this embodiment, the member that forms the left side surface 34a is overlapped with the member that generates the right side surface 34b and the upper surface 31, and the contact portion 37 is formed along the left side surface 34a in the vehicle body width direction. As described above, when the contact portion 37 is continuously provided on one side surface of the support shaft holding bracket 3, the support shaft is supported by a load applied to the contact portion 37 without increasing the strength of the support shaft holding bracket 3. Deformation of the holding bracket 3 (particularly near the base of the contact portion 37) can be suppressed.

  Further, side surfaces 34a and 34b (hereinafter also collectively referred to as 34) are formed by providing a step so that the vehicle body width direction is widened at a position separated from the upper surface by a predetermined distance. 28 and the guide portions 36a and 36b (hereinafter also collectively referred to as 36) extending in the longitudinal direction of the vehicle body and holes 35a and 35b (hereinafter collectively referred to as support portions for supporting the support shaft 10 of the pedal 2). And 35).

  Openings by notches 38a and 38b (hereinafter also collectively referred to as 38) are provided on the vehicle body rear side of the guide portions 36a and 36b on the vehicle body front side rather than the tip of the contact portion 37. The rear end has a shape having an edge. As a result, the force generated when the abutting portion 37 abuts against the instrument panel member 6 is converted into a rotational moment with the edge of the rear end of the guide portion 36 as a fulcrum by the lever action of the abutting portion 37. The rotational movement of the shaft holding bracket 3 becomes smooth.

  The structure of the fork bracket 4 will be described in detail with reference to FIG. The upper surface 41 is provided with holes 42 for bolts 11 for fixing the fork bracket 4 to the pedal bracket 2 together with the support shaft holding bracket 3. Fork brackets are disposed on the pedal brackets 2 by providing steps on the side surfaces 43a and 43b (hereinafter also collectively referred to as 43) so that the vehicle body width direction is widened at a predetermined distance from the upper surface. Sometimes, leg portions 45a and 45b (hereinafter also collectively referred to as 45) having surfaces abutting on the guide surfaces 28a and 28b are formed.

  Further, when the fork bracket 4 is fixed on the pedal bracket 2 with the bolts 11, the side surfaces 43 a and 43 b restrict the movement of the support shaft 10 toward the front side of the vehicle body, and lock the opening 27 of the pedal bracket 2. Openings 44a and 44b (hereinafter collectively referred to as 44) having peripheral surfaces for holding the support shaft 10 together with the portion are formed.

  Here, with reference to FIG. 1 again, the positional relationship of each part in the state which assembled the pedal support structure of this embodiment is demonstrated.

  In the pedal support structure of the present embodiment, the fork bracket 4 is located on the rear side of the vehicle body closest to the instrument panel member 6, and the lever-like contact of the support shaft holding bracket 3 is next located near the instrument panel member 6. It is a contact part (37). As described above, when the vehicle collides forward, the entire pedal support structure moves to the rear of the vehicle body as the master cylinder 1 moves backward. At this time, the first contact with the instrument panel member 6 is the fork bracket. 4, when the fork bracket 4 moves forward relative to the collision, the lever-shaped contact portion (37) of the support shaft holding bracket 3 also contacts the instrument panel member 6. That is, the rear end portion of the fork bracket 4 serves as the second contact portion according to the present invention.

  Hereinafter, the operation until the pedal falls off in the pedal support structure of the present embodiment when the vehicle collides will be described together with the trajectory of the support shaft in the opening of the pedal bracket. FIG. 6 is a diagram for explaining the trajectory of the support shaft in the opening of the pedal bracket, and FIGS. 7 to 11 are side views schematically showing the state of the pedal support structure at each stage until the pedal falls off. It is. 7 to 11, since the position of the pedal support structure is shown as a reference, the instrument panel member 6 is shown moving to the front side of the vehicle body. The position of 6 in the vehicle body does not substantially change, and the entire pedal support structure moves to the vehicle body rear side.

  In the normal state shown in FIG. 7, the instrument panel member 6 and each member of the pedal support structure are separated from each other, and the rear end of the fork bracket 4 is located closest to the instrument panel member 6. In this state, the support shaft 10 of the brake pedal 5 is moved rearward and up and down by the peripheral surface of the locking portion 271 (see FIG. 6) on the vehicle body rear side of the opening of the pedal bracket 2, and the opening of the fork bracket 4 is opened. The movement toward the front side of the vehicle body is restricted by the peripheral surface of each of the two, and is firmly held.

  Here, when a frontal collision of the vehicle occurs, the master cylinder moves backward, and the entire pedal support structure also moves backward. When the entire pedal support structure is retracted, first, the rear end of the fork bracket 4 abuts against the instrument panel member 6 and moves horizontally relative to the front side of the vehicle body along the guide surface of the pedal bracket 2.

  FIG. 8 shows that the fork bracket 4 moves toward the front side of the vehicle body by the reaction force of the pressing force applied to the instrument panel member 6 as the entire pedal support structure moves backward and the rear end of the fork bracket 4 abuts against the instrument panel member 6. A state is shown in which the rear end of the fork bracket 4 and the contact portion 37 of the support shaft holding bracket 3 are in contact with the instrument panel member 6 by horizontally moving. In this state, the bolt 11 on the upper surface of the fork bracket 4 is disengaged from the slit 25 a of the opening 25 on the upper surface of the pedal bracket 2 and the opening 32 on the upper surface of the support shaft holding bracket 3, and the fork bracket 4 is located on the guide surface of the pedal bracket 2. It is only placed on top.

  As shown in the figure, the support shaft 10 of the brake pedal 5 is separated from the peripheral surface of the opening 44 of the fork bracket 4 by the relative movement of the fork bracket 4 to the front side of the vehicle body, and can be moved to the front side of the vehicle body. It has become. That is, the support shaft 10 of the brake pedal 5 is held only by the peripheral surface of the locking portion 271 (see FIG. 6) on the vehicle body rear side of the opening of the pedal bracket 2, and the movement in the rear side and the vertical direction is restricted. It has become a state.

  When the entire pedal support structure is further retracted from here, the contact portion 37 is pushed together with the fork bracket 4 to the front side of the vehicle body by the reaction force of the pressing force to the instrument panel member 6. FIG. 9 shows this state. Compared with FIG. 8, the fork bracket 4 and the support shaft holding bracket 3 are slightly moved horizontally relative to the front of the vehicle body.

  Here, the horizontal movement distance is the distance from the position where the support shaft 10 is in contact with the circumferential surface on the vehicle body rear side to the position where it is in contact with the circumferential surface on the vehicle body front side in the opening 27 of the pedal bracket 2. ). The distance indicated by (i) is shorter than the distance from the rear end of the pedal bracket 2 to the front edge of the vehicle body of the contact portion 37.

  When the entire support structure of the pedal is further retracted from the state in which the support shaft 10 has moved forward in the opening 27 as described above, the reaction force of the pressing force applied to the instrument panel member 6 is applied to the contact portion 37. 3 is regulated by the peripheral surface of the opening 27 of the pedal bracket 2 on the front side of the vehicle body, so that the lever holding action 3 causes the support shaft holding bracket 3 to open the opening 38 at the rear end of the guide portion 36. Rotational moment with the edge formed by (see FIG. 4) as a fulcrum works.

  FIG. 10 shows this state, and the support shaft holding bracket 3 rotates counterclockwise with the edge of the guide portion 36 at the position indicated by 201 in the figure as a fulcrum. At this time, the support shaft 10 moves downward along the circumferential surface of the opening portion 272 on the vehicle body front side of the opening 27 of the pedal bracket 2 along a locus as shown in FIG. 6 (ii). In this state, the support shaft 10 is below the opening 272 and can be easily moved downward.

  When the entire pedal support structure further retreats from here, the rotation about the fulcrum 201 of the support shaft holding bracket 3 proceeds by the reaction force of the pressing force to the instrument panel member 6, and the edge of the contact portion 37 on the front side of the vehicle body The portion comes into contact with the upper surface of the pedal bracket 2. Then, the support point of rotation of the support shaft holding bracket 3 shifts to a contact portion of the contact portion 37 indicated by 202 in the figure on the upper surface of the pedal bracket 2, and the support shaft holding bracket 3 is caused by a large rotational moment around the support point 202. Rotates counterclockwise. By this rotation, the support shaft 10 moves below the opening 272 along a trajectory as shown in FIG. 6 (iii), and the pedal 5 and the support shaft holding bracket 3 drop off from the pedal support structure. At the same time when the pedal 5 is dropped, the pedal 5 rotates clockwise around the central portion of the pedal 5 that is the connecting pin portion with the master cylinder 1, and the pedal at the lower end of the pedal 5 that the driver steps on with the foot The pad portion moves forward of the vehicle body.

  FIG. 11 shows a state in which the pedal 5 and the support shaft holding bracket 3 have dropped off, and the load on the driver's foot is reduced by the pedal 5 dropping off in this way.

Here, the sequence from the collision to the dropping of the pedal in the pedal support structure of the present embodiment will be described again in order as follows.
(1) The fork bracket moves relative to the front side of the vehicle body, and the contact portion contacts the instrument panel member.
(2) The fork bracket and the support shaft holding bracket move relative to the front side of the vehicle body, and the support shaft moves from the locking portion to the front opening portion.
(3) Due to the action of the lever of the contact portion, the support shaft holding bracket rotates with the edge of the guide portion rear end as a fulcrum.
(4) The fulcrum of rotation of the support shaft holding bracket moves to the portion of the contact portion that contacts the pedal bracket, and the pedal falls off together with the support shaft holding bracket.

  As described above, in the pedal support structure of this embodiment, as the collision progresses, the member on which the force generated by the collision is changed, the movement of the member is changed from horizontal movement to rotational movement, and the fulcrum of the rotational movement is The shape and arrangement of each member are devised so as to be changed, so that deformation due to stress concentration can be mitigated, and the pedal can be removed reliably and smoothly.

(Other embodiments)
In addition, this invention is not limited to said embodiment, Other various embodiment and a modification are included. That is, the shape of each member shown by the said embodiment is an example, and if the removal of a pedal is performed in the procedure which this invention intends, it will not be limited to these.

1 is a side view of a brake pedal assembly as an embodiment of a pedal support structure for an automobile according to the present invention. It is a perspective view of the brake pedal assembly of FIG. It is a figure which shows the structure of the pedal bracket. It is a figure which shows the structure of the spindle holding bracket. It is a figure which shows the structure of the fork bracket. It is a figure which shows the locus | trajectory of the spindle until a pedal falls off. It is a figure explaining operation | movement until a pedal falls. It is a figure explaining operation | movement until a pedal falls. It is a figure explaining operation | movement until a pedal falls. It is a figure explaining operation | movement until a pedal falls. It is a figure explaining operation | movement until a pedal falls.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Master cylinder 2 Pedal bracket 3 Support shaft holding bracket 4 Fork bracket 5 Brake pedal 6 Instrument panel member 10 Pedal support shaft 11 Bolt 21 Cylinder fastening surface 22 Piston opening 23 Bolt opening 24 Upper surface 25 Opening 25a Slit 26 Side 27 Opening 28 Guide Surface 31 Upper surface 32 Opening 34 Side surface 35 Holding portion 36 Guide portion 37 Contact portion 38 Notch 41 Upper surface 42 Hole 43 Side surface 44 Opening 45 Leg portion 201, 202 Support point 271 Locking portion 272 Opening portion

Claims (12)

A pedal support structure for an automobile that swingably supports a pedal disposed on a vehicle interior side of a dash panel,
A support shaft holding bracket for holding the pedal support shaft;
A front end is fastened to the dash panel, and a locking portion for releasably locking the support shaft holding bracket by the relative movement of the support shaft holding bracket to the front of the vehicle body and a guide surface extending in the longitudinal direction of the vehicle body A pedal bracket having
The support shaft holding bracket is
A support portion removably supported by the locking portion;
A lever-like contact portion that is provided behind the locking portion and extends upward and relatively moves backward;
An automobile pedal support structure comprising: a guide portion that abuts on a substantially horizontal guide surface formed on the pedal bracket.   2. The pedal support structure for an automobile according to claim 1, wherein the contact portion is disposed rearwardly by a first predetermined distance from the rear end of the pedal bracket.   In the pedal bracket, the guide surface is below the locking portion, and the support portion is relatively moved forward by a second predetermined distance smaller than the first predetermined distance from the locking portion to the front side of the vehicle body. The automobile pedal support structure according to claim 2, further comprising a displacement regulating surface that regulates the movement.   2. The pedal support structure for an automobile according to claim 1, wherein a rear end portion of the guide portion is located on a vehicle body front side with respect to the contact portion.   5. The pedal support structure for an automobile according to claim 4, wherein the guide portion is located on a vehicle rear side with respect to the support portion and on a vehicle body front side with respect to the contact portion.   The pedal support structure for an automobile according to claim 1, wherein an edge is provided at a rear end of the guide portion.   The locking portion is configured by a part of a peripheral surface portion of an opening provided on both side walls of the pedal bracket, and an opening portion is provided below the locking portion of the opening on the front side of the vehicle body. The pedal support structure for an automobile according to claim 1.   The pedal support structure for an automobile according to claim 7, wherein the opening portion is provided on the guide surface.   2. The pedal support structure for an automobile according to claim 1, wherein the contact portion is provided continuously on at least one side surface of the support shaft holding bracket in the vehicle width direction.   2. The pedal support structure for an automobile according to claim 1, wherein the guide surface is inclined downward in an outer direction of the vehicle body when viewed from the front.   2. The pedal support structure for an automobile according to claim 1, wherein the support shaft holding bracket includes a slit extending in a longitudinal direction of the vehicle body along the guide portion.   It further includes a fork bracket that is fixed to the pedal bracket and supported so as to be slidable forward of the vehicle body in the event of a collision. The automobile pedal support structure according to claim 1, further comprising: a restriction portion that performs contact with a vehicle body member at a position behind the vehicle body relative to the contact portion.

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