JP4968204B2 - Brake pedal support structure - Google Patents

Description

  The present invention relates to a brake pedal support structure provided in a vehicle.

  2. Description of the Related Art Conventionally, there is an automobile in which a brake pedal is fixed to a lower portion of a dash panel that partitions an engine room and a vehicle compartment, that is, a vehicle compartment side of a dash lower panel. And the booster attached to the engine room side of the dash panel via the push rod is actuated when the pedal pad at the lower end of the brake pedal is depressed by the driver.

  For this reason, when the dash panel is deformed in the vehicle rearward direction, that is, toward the vehicle interior due to the retreat of the power unit or the like in the engine room at the time of a frontal collision of the automobile, the brake pedal is retracted accordingly. Then, the depression position of the pedal pad is shifted backward, which gives the driver a feeling of strangeness.

  In order to cope with such a backward movement of the pedal pad, conventionally, the brake pedal is rotated around the push rod as a fulcrum by moving the pedal rotating shaft that rotatably supports the brake pedal in the event of a collision. Is moved relatively forward to prevent the pedal pad from retreating (see Patent Document 1).

In the technique disclosed in Patent Document 1, a guide portion extending in a horizontal direction is provided on a support base member fixed to a dash panel, and a pedal rotation shaft of a brake pedal is disposed on the front side of the guide portion. In this case, the pedal rotation shaft is prevented from moving backward by the fixing member disposed on the rear side of the rotation shaft. In the event of a frontal collision of the automobile, the fixed member is removed and the pedal rotation shaft moves backward along the guide portion. As a result, the brake pedal pivots forward with the connecting point of the push rod as a fulcrum. As a result, the backward movement of the pedal pad can be suppressed.
Japanese Unexamined Patent Publication No. 2002-2460 (5th page, FIG. 1)

  However, the technique described in Patent Document 1 has a problem that the mounting reliability of the pedal rotation shaft is low because the fixing member for fixing the pedal rotation shaft is simply inserted into the guide portion.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a brake pedal support structure that can improve the mounting reliability of a pedal rotating shaft and can suppress the backward movement of a pedal pad during a frontal collision of a vehicle.

  The brake pedal support structure according to the present invention includes a pedal rotating shaft that supports the brake pedal so as to be pivotable in the front-rear direction at an upper portion of the brake pedal having an operation force receiving member at a lower portion, and the operation force receiving member in the brake pedal. An operation force transmitting member that is connected between the pedal rotation shaft and transmits an operation force applied to the operation force receiving member to the booster, and provided on the pedal bracket, and rearward of the pedal bracket from the mounting position of the pedal rotation shaft A first guide path for guiding the pedal rotation shaft, an interposition member provided to be relatively movable with respect to the pedal bracket, and the pedal rotation shaft provided at the interposition member and positioned at the attachment position Is inserted, and the pedal rotation shaft positioned at the attachment position is connected to the pedal with the second guide path allowing rearward movement of the pedal rotation shaft. Via the intervening member to the bracket, characterized in that it comprises a screw fastening structure for fixing by screw fastening force.

  According to the present invention, since the pedal rotation shaft is fixed to the pedal bracket and the interposition member by the screw fastening structure, the mounting reliability of the pedal rotation shaft can be improved. In addition, when the vehicle collides with the front and the pedal bracket that receives a load exceeding the specified amount moves backward, the pedal rotation shaft is fixed to the pedal bracket by the screw fastening structure. Then, since the pedal rotation shaft can move rearward along the first guide path with respect to the pedal bracket, when the operation force receiving member is pressed by the driver's leg, the brake pedal The upper end portion rotates together with the operating force transmission member as a fulcrum so that the upper end portion moves rearward with respect to the pedal bracket together with the pedal rotation shaft. Thereby, it is possible to suppress the operation force receiving member from moving backward, and to suppress the position of the pedal pad from retreating.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a brake pedal support structure according to the present embodiment, FIG. 2 is a perspective view showing the brake pedal support structure according to the present embodiment, and FIG. 3 shows the brake pedal support structure according to the present embodiment. FIG. 4 is an enlarged view of a portion II in FIG. 2, FIG. 5 is a side view showing the pedal rotation shaft and its circumference according to the present embodiment, and FIG. 6 is a VV line in FIG. FIG. 7 is a side view showing the interposition member according to this embodiment, and FIG. 8 is a side view showing the pedal bracket according to this embodiment. In the following description, the directions simply referred to as the front-rear direction and the left-right direction refer to the front-rear direction of the vehicle and the left-right direction of the vehicle.

  As shown in FIGS. 1 to 3, the brake pedal support structure 1 of this embodiment includes a brake pedal 2 having a pedal pad 22 as an operation force receiving member at the lower portion and extending in the vertical direction. The brake pedal 2 is disposed in a passenger compartment R of an automobile that is a vehicle. A pedal rotation shaft 23 a is provided on the upper part of the brake pedal 2, and the pedal rotation shaft 23 a supports the brake pedal 2 so as to be rotatable in the front-rear direction on the brake pedal 2. The pedal rotation shaft 23a is supported by a pedal bracket 4 fixed to a dash panel 6 (FIG. 1) which is a vehicle body constituting member. The brake pedal support structure 1 includes a push rod 3 (FIG. 1) as an operation force transmission member that transmits an operation force applied to the pedal pad 22 to the booster 7, and the push rod 3 is a pedal pad 22 in the brake pedal 2. And the pedal rotation shaft 23a.

  In general, the brake pedal support structure 1 includes a brake pedal 2 centered on a pedal rotation shaft 23a when a pedal pad 22 of the brake pedal 2 is stepped forward (rightward in FIG. 1) by a driver's leg. Is rotated forward (rightward in FIG. 1) to push the push rod 3 forward. Then, the booster 7 is actuated by pushing the push rod 3 to boost the pedaling force of the pedal pad 22, and the master cylinder (not shown) is actuated by the boosted pedaling force to generate the brake fluid pressure. Yes.

  Here, the dash panel 6 is a panel that separates the engine room E / R and the vehicle compartment R, and constitutes a part of the vehicle body. The dash panel 6 is composed of a dash lower panel 61 that forms the lower part thereof and a dash upper panel 62 that forms the upper part thereof.

  The dash lower panel 61 includes a first attachment wall portion 61a as a first vehicle body portion to which the booster 7 and the pedal bracket 4 are attached, and a first oblique portion extending obliquely downward and rearward from the first attachment wall portion 61a. And a rear end portion (lower end portion) of the first inclined wall portion 61b is connected to a floor panel (not shown). In the engine room E / R in front of the dash lower panel 61, a device such as a power unit including the engine (hereinafter also referred to as a device in front of the panel) is disposed in the vicinity of the dash lower panel 61. When the device in front of the panel in the engine room E / R moves backward, the dash lower panel 61 is pushed by the device and deforms rearward (inward of the passenger compartment R) to absorb the collision energy. Yes.

  The dash upper panel 62 has a front end portion connected to the first mounting wall portion 61a of the dash lower panel 61 and a second inclined wall portion 62a extending obliquely rearward and upward from the front end portion, and the second inclined wall portion. And a second mounting wall portion 62b as a second vehicle body portion that is bent upward from the rear end portion (upper end portion) of 62a and extends obliquely upward rearward. The second mounting wall portion 62b is located rearward in the vehicle front-rear direction with respect to the first mounting wall portion 61a of the dash lower panel 61. The upper end portion (not shown) of the dash upper panel 62 is joined to a cowl portion (not shown) having a closed cross-sectional structure that is a vehicle body constituting member. The members accommodated in the engine room E / R in front of the dash upper panel 62 are arranged sufficiently separated from the dash upper panel 62, and the dash upper panel 62 is provided at the time of a frontal collision of the automobile. The load input from the front to the dash upper panel 62 is significantly smaller than the input load to the dash lower panel 61, and the dash upper panel 62 does not easily deform even in the event of a frontal collision of the automobile. Yes.

  Next, each part of the brake pedal support structure 1 will be described in detail.

  As shown in FIGS. 1 to 3, the brake pedal 2 includes a pedal arm 21 extending vertically and a pedal pad 22 provided at a lower end portion of the pedal arm 21. A pedal rotation shaft 23 a is provided at the upper end of the pedal arm 21. Further, the push rod 3 is connected by a clevis 31 between the pedal pad 22 and the pedal rotation shaft 23 a in the brake pedal 2, that is, between the pedal pad 22 and the pedal rotation shaft 23 a in the pedal arm 21. The clevis 31 has a clevis pin 32 penetrating the pedal arm 21 in the left-right direction, and is rotatable with respect to the pedal arm with the clevis pin 32 as a rotation center.

  The brake pedal 2 is attached to the lower part of the dash panel 6 through the pedal rotating shaft 23a, the pedal bracket 4 and the interposition member 5 so as to be able to turn back and forth.

  The pedal rotation shaft 23a is fixed to the pedal bracket 4 via the interposition member 5 by a screw fastening structure 27 having a bolt 23 as a male screw member and a nut 26 as a female screw member. Here, the fixing of the pedal rotation shaft 23a by the screw fastening structure 27 is released in the event of a frontal collision of the automobile, as will be described in detail later. The pedal rotation shaft 23 a constitutes a shaft portion of the bolt 23. That is, the bolt 23 includes a head portion 23b and a pedal rotation shaft 23a as a shaft portion, and a male screw portion 23c is formed on the shaft portion (pedal rotation shaft 23a). The pedal rotation shaft 23a penetrates the interposition member 5 and the pedal bracket 4 in the left-right direction.

  The pedal bracket 4 is disposed behind the first mounting wall 61a of the dash lower panel 61 and is fixed to the first mounting wall 61a. The pedal bracket 4 supports the pedal rotation shaft 23a. . Specifically, as shown in FIGS. 3 and 4, the pedal bracket 4 includes a pair of left and right first side walls 41 and 41, and a ceiling in which upper ends of the pair of left and right first side walls 41 and 41 are connected to each other. The wall 42 is formed in a U-shaped cross section that opens downward. A flange portion 43 for attaching the pedal bracket 4 to the first attachment wall portion 61 a of the dash lower panel 61 is formed at the front end portion of the pedal bracket 4. An attachment hole 44 through which a fastening member such as a bolt or a screw (not shown) is inserted is formed in the flange portion 43, and the flange portion 43 is connected to the dash lower panel 61 by a fastening member (not shown) inserted through the attachment hole 44. The pedal bracket 4 is fixed to the first mounting wall portion 61a of the dash lower panel 61 by such a structure. The pedal bracket 4 is fixed to the inner surface of the first mounting wall portion 61a.

  As shown in FIGS. 6 and 8, a long hole 110 serving as a first guide path is formed in each of the pair of left and right first side walls 41, 41 of the pedal bracket 4. The long hole 110 extends rearward from the mounting position of the pedal rotation shaft 23a in the pedal bracket 4 and guides the pedal rotation shaft 23a. The pedal rotation shaft 23 a is inserted into the elongated hole 110, and the pedal rotation shaft 23 a is spanned between the pair of left and right first side walls 41, 41. Specifically, the long hole 110 extends in the front-rear direction and the vertical direction, and a front end portion thereof is an attachment portion 110 a to which the pedal rotation shaft 23 a is attached. The attachment portion 110 a is a pedal in the pedal bracket 4. The movement of the attachment position of the rotating shaft 23a in the vehicle front-rear direction is restricted. More specifically, the long hole 110 is formed so as to be inclined obliquely downward and rearward from the front end portion (attachment portion 110a), and has an arc shape. In the long hole 110, the pedal rotating shaft 23a is movable along the extending direction. The long hole 110 is configured to guide the pedal rotation shaft 23a backward from the mounting position (mounting portion 110a) of the pedal rotation shaft 23a in the pedal bracket 4 at the time of a frontal collision of the automobile. The rear end portion (lower end portion) is a retracted position of the pedal rotation shaft 23a located behind the attachment position.

  As shown in FIG. 1, the interposition member 5 is fixed to the second mounting wall portion 62 b of the dash upper panel 62, and the interposition member 5 is supported by the dash upper panel 62 and can move relative to the pedal bracket 4. It is possible. Specifically, as shown in FIGS. 3, 4, and 6, the interposition member 5 includes a pair of left and right second side walls 51, 51 and a top wall 52 that connects the pair of left and right second side walls 51, 51. Is formed in a U-shaped cross-section that opens downward. An attachment hole 53 for attaching the interposition member 5 to the dash upper panel 62 is formed in the top wall 52. Then, the interposition member 5 is fixed to the inner surface (the vehicle compartment side surface) of the second mounting wall portion 62b of the dash upper panel 62 by a fastening member (not shown) such as a bolt or a screw inserted into the mounting hole 53. is there.

  Then, the interposition member 5 is disposed so as to cover the pedal bracket 4 from above so that the pair of left and right second side walls 51, 51 are positioned on the pair of left and right side walls of the pedal bracket 4. Are fitted so as to be relatively movable in the front-rear direction. In such a structure, the pedal bracket 4 can move rearward relative to the interposition member 5 when the dash lower panel 61 is deformed rearward due to a frontal collision of the automobile.

  Each of the pair of left and right second side walls 51, 51 is provided with a notch 100 as a second guide path, as shown in FIGS. The notch 100 is inserted into the pedal rotation shaft 23a located at the mounting position of the pedal bracket 4, and allows the pedal rotation shaft 23a to move backward. Specifically, the cutout portion 100 is formed to extend in the front-rear direction, and is enlarged rearward and obliquely downward from the front portion 100b, and the rear portion 100a is opened. The front part 100b of the notch part 100 restricts the movement of the mounting position of the pedal rotation shaft 23a in the pedal bracket 4 in the vehicle vertical direction.

  The cutout portion 100 is formed with a drop guide portion 120 that is inclined rearward and obliquely downward from the front portion 100b. The drop-off guide part 120 abuts on the pedal rotation shaft 23a that moves rearward together with the pedal bracket 4 relative to the interposition member 5, and presses the pedal rotation shaft 23a downward.

  Each of the pair of left and right second side walls 51, 51 is provided with a lock part 121 that is continuous with the rear end of the drop-off guide part 120. The lock portion 121 locks the pedal rotating shaft 23a located at the retracted position in the pedal bracket 4 to prevent the pedal rotating shaft 23a from returning from the retracted position to the mounting position. It is an inclined portion that is continuous with the rear end of the guide portion 120, and is formed to be inclined obliquely upward and backward from its front end portion.

  The interposition member 5 constitutes a brake pedal retraction preventing mechanism 10 (FIG. 1) together with the elongated hole 110 of the pedal bracket 4.

  The screw fastening structure 27 includes the bolt 23 and the nut 26 as described above. As shown in FIGS. 4 to 6, the pedal rotation shaft 23 a positioned at the mounting position is connected to the pedal bracket 4 via the interposition member 5. 23 and the nut 26 are fixed by the screw fastening force. Specifically, in the screw fastening structure 27, the bolt 23 is inserted into the cutout portion 100 of the second side wall 51 of the interposition member 5 and the elongated hole 110 of the first side wall 41 of the pedal bracket 4 from the male screw portion 23c side. The pedal rotation shaft 23a is fixed to the pedal bracket 4 via the interposition member 5 by passing through and screwing the nut into the male screw portion 23c. In such a structure, the pair of left and right second side walls 51 of the interposition member 5 are clamped by the head 23b of the bolt 23 and the nut 26, whereby the pedal bracket 4 is clamped between the pair of left and right second side walls 51. . The fixing of the pedal rotation shaft 23a to the pedal bracket 4 by the screw fastening structure 27 is released by the rearward movement of the pedal bracket 4 with respect to the interposition member 5 that receives a load exceeding the specified amount in the rearward direction. ing.

  A collar 24 is fitted between the pair of left and right first side walls 41, 41 of the pedal bracket 4 on the outer periphery of the pedal rotation shaft 23a that is the shaft portion of the bolt 23, and the outer periphery of the collar 24 in the substantially central portion in the length direction. The upper end of the pedal arm 21 is rotatably fitted. Therefore, the pedal rotating shaft 23 a rotatably supports the brake pedal 2 in a state where the pedal rotating shaft 23 a is connected to the brake pedal 2 via the collar 24.

  A torsion spring 25 as an urging member is fitted to the outer periphery of the collar 24. As shown in FIGS. 1 and 3, the torsion spring 25 locks one end portion 25 a to the top wall 42 of the pedal bracket 4 and allows the other end portion 25 b to penetrate the pedal arm 21 to lock the pedal arm 21. It is. The torsion spring 25 functions as a return spring for the brake pedal 2, and urges the brake pedal 2 to rotate rearward (in the direction of arrow X in the figure) about the pedal rotation shaft 23a. The torsion spring 25 having such a structure biases the pedal rotation shaft 23a in a direction in which the pedal rotation shaft 23a moves rearward from the attachment position along the long hole 110.

  Next, the operation of the brake pedal support structure at the time of a frontal collision of an automobile will be described with reference to FIG. FIG. 9 is a side view of a main part illustrating the operation of the brake pedal support structure at the time of a frontal collision of the automobile according to the present embodiment in order from (a) to (d).

  From the normal state shown in FIG. 9 (a), the frontal collision of the automobile causes the front panel device in the engine room E / R to move backward, and the dash lower panel 61 is pushed backward together with the booster 7, and the dash pushed backward. When a load exceeding the specified amount is applied to the pedal bracket 4 by the first mounting wall portion 61a of the lower panel 61, the interposition member 5 is supported by the second mounting wall portion 62b of the dash upper panel 62 and the rearward movement thereof is performed. Therefore, the pedal bracket 4 moves rearward relative to the interposition member 5 against the screw fastening force of the screw fastening structure 27, whereby the bolt 23 and the nut 26 are The screw fastening structure 27 loses its screw fastening force, that is, the pedal rotating shaft 23a with respect to the pedal bracket 4 by the screw fastening structure 27. Fixed is released.

  As shown in FIG. 9 (b), when the pedal bracket 4 is moved backward relative to the interposition member 5, the pedal rotation shaft 23 a located at the mounting position in the pedal bracket 4 is connected to the mounting portion 110 a in the long hole 110. It is pushed rearward by the inner peripheral surface and moves rearward relative to the interposition member 5 together with the pedal bracket 4. When the pedal rotation shaft 23a moves rearward along the notch 100, the notch 100 expands rearward and obliquely downward, so that the pedal rotation shaft 23a is long as shown in FIG. 9 (c). The pedal rotating shaft 23a moves downward relative to the pedal bracket 4 from the mounting position in the pedal bracket 4 toward the retracted position, and finally reaches the retracted position. . That is, the notch 100 allows the pedal rotation shaft 23 a to move backward with respect to the pedal bracket 4 from the mounting position on the pedal bracket 4. The movement of the pedal rotation shaft 23 a along the long hole 110 is performed by the weight of the brake pedal 2. That is, the brake pedal 2 moves the pedal rotation shaft rearward from the mounting position of the pedal bracket 4 along the long hole 110 by the weight of the brake pedal 2 when receiving a load exceeding a specified value rearward of the vehicle. In the present embodiment, the torsion spring 25 biases the pedal rotation shaft 23a in the direction in which the pedal rotation shaft 23a moves rearward from the attachment position along the long hole 110. In addition, since the pedal rotation shaft 23a moves along the long hole also by the biasing force of the torsion spring 25, the movement of the pedal rotation shaft 23a along the long hole 110 becomes faster by the biasing force.

  As described above, the pedal rotating shaft 23a is lowered along the elongated hole 110 by the weight of the brake pedal 2 and the biasing force of the torsion spring 25. However, the pedal rotating shaft 23a is fast in the backward movement speed. When it contacts the drop-off guide part 120, the pedal rotating shaft 23a is pressed downward by the drop-off guide part 120, and moves downward (rearward) along the long hole 110 by the combined force including the pressing force. .

  Then, when the pedal rotation shaft 23a moves to the lower end portion (retracted position) of the long hole 110 and moves to the lower end portion of the drop-off guide portion 120, and further the pedal bracket 4 moves rearward, as shown in FIG. 9 (d). Further, the pedal rotation shaft 23 a is positioned below the lock portion 121 of the interposition member 5 and is locked to the lock portion 121. Then, the pedal rotation shaft 23a is pushed into the lower end portion of the long hole 110 and fixed at the retracted position, and the lock portion 121 prevents the pedal rotation shaft 23a from returning from the retracted position to the mounting position.

  Thus, when the pedal rotating shaft 23a moves rearward from the mounting position in the pedal bracket 4 along the long hole 110, the brake pedal 2 is connected to the push rod 3 so that the lower end portion thereof moves forward. The pedal pad 22 rotates relative to the pedal bracket 4 with the point (clevis pin 32) as a fulcrum (FIG. 9 (d)). Thereby, it is suppressed that the position of the pedal pad 22 retreats. In FIG. 9 (d), the brake pedal 2 before the collision is indicated by a two-dot chain line for comparison.

  Further, in this configuration, when the automobile collides with the front, the pedal bracket 4 that has received a load exceeding the prescribed amount moves rearward relative to the interposition member 5, and the screw fastening structure 27 When the fixing of the pedal rotation shaft 23a to the pedal bracket 4 is released, the pedal rotation shaft 23a can move rearward along the long hole 110 with respect to the pedal bracket 4, so that the pedal pad 22 is a leg of the driver. When the brake pedal 2 is pressed, the upper end portion of the brake pedal 2 moves rearward with respect to the pedal bracket 4 together with the pedal rotating shaft 23a regardless of the weight of the pedal bracket 4 or the biasing force of the torsion spring 25. The pivot point (clevis pin 32) is connected to the push rod 3 as a fulcrum. Thereby, it is suppressed that the pedal pad 22 moves back, and it can suppress that the position of the pedal pad 22 retreats.

  In the brake pedal support structure 1 of the present embodiment described above, the pedal rotation shaft 23a is fixed to the pedal bracket 4 and the interposition member 5 by the screw fastening structure 27. Therefore, the strength and rigidity of fixing the pedal rotation shaft 23a to the pedal bracket 4 is fixed. And the mounting reliability of the pedal rotation shaft 23a can be improved. If the pedal bracket 4 that has received a load greater than a specified amount in the rearward is caused by a frontal collision and moves rearward relative to the interposition member 5, the pedal with respect to the pedal bracket 4 by the screw fastening structure 27 The rotation of the rotating shaft 23a is released, and the pedal rotating shaft 23a moves rearward along the elongated hole 110 from the mounting position of the pedal rotating shaft 23a in the pedal bracket 4, so that the lower end portion of the brake pedal 2 is moved forward. Since the pedal pad 22 is moved forward relative to the pedal bracket 4 so as to move, the pedal pad 22 moves relative to the pedal bracket 4 so that the position of the pedal pad 22 is retracted. Can be suppressed.

  Moreover, in this embodiment, the screw fastening structure 27 has the bolt 23 which has the head 23b and the axial part, and the nut 26 screwed together to this bolt 23, and the pedal rotating shaft 23a is the axis | shaft of the bolt 23. Therefore, the number of parts of the brake pedal support structure 1 can be reduced as compared with the case where the pedal rotating shaft and the bolt 23 are configured as separate parts, and the structure of the brake pedal support structure 1 is simplified. Can be

  Further, in the present embodiment, the first guide path is a long hole 110 through which the pedal rotation shaft 23a (the shaft portion of the bolt 23) is inserted, and the pedal bracket 4 is formed with the long holes 110 respectively. The pair of left and right first side walls 41 and 41 are connected, and the interposition member 5 is disposed outside the pair of left and right first side walls 41 and 41 and connected to each other. 51, 51, and the second guide path is formed on each of the pair of left and right second side walls 51, 51 and the pedal rotation shaft 23a located at the mounting position on the pedal bracket 4 is inserted, and the rear part is opened. The screw fastening structure 27 includes a pair of left and right second side walls 51, 51 sandwiched between the head 23 b of the bolt 23 and the nut 26, and the pair of left and right second side walls 51, 51. To pedal bracket Which is sandwiched a. Therefore, the pedal rotation shaft 23a is easily fixed to the pedal bracket 4 by inserting the pedal rotation shaft 23a, which is the shaft portion of the bolt 23, into the notch 100 and the long hole 110 and screwing the nut 26 into the bolt 23. be able to.

  Further, in the present embodiment, the long hole 110 serving as the first guide path has an attachment portion 110a that restricts movement of the attachment position of the pedal rotation shaft 23a in the pedal bracket 4 in the vehicle front-rear direction. The notch 100, which is a second guide path, is inclined rearward and downward from the portion 110a, and a front portion 100b that restricts the movement of the mounting position of the pedal rotation shaft 23a in the pedal bracket 4 in the vehicle vertical direction. And the brake pedal 2 extends the pedal rotation shaft 23a by its own weight when receiving a load exceeding a specified value toward the rear of the vehicle. Since the pedal bracket 4 is moved rearward from the mounting position of the pedal rotation shaft 23a along the hole 110, the pedal weight is effectively used by the weight of the brake pedal 2. You can move the rotating shaft 23a.

  Further, in the present embodiment, the notch portion 100 has the drop-out guide portion 120 inclined obliquely downward and rearward from the front portion 100b, so that the pedal is moved rearward and obliquely downward along the long hole 110. Since the drop-off guide part 120 guides the rotating shaft 23a, the pedal rotating shaft 23a can be moved along the long hole 110 more smoothly.

  In the present embodiment, the pedal rotation shaft 23a located at the retracted position behind the mounting position in the pedal bracket 4 is locked to prevent the pedal rotating shaft 23a from returning from the retracted position to the mounting position in the pedal bracket 4. Since the locking portion 121 is provided, the locking portion 121 can lock the pedal rotation shaft 23a at the retracted position. Therefore, even when an upward force is applied to the pedal rotation shaft 23a after the pedal rotation shaft 23a has moved to the retracted position, the upward movement of the pedal rotation shaft 23a is restricted to prevent the pedal pad 22 from moving backward. Can be maintained.

  Moreover, in this embodiment, since the lock part 121 is provided in the interposed member 5, compared with the case where a lock part is provided in the pedal bracket 4, the structure of the pedal bracket 4 can be simplified.

  In the present embodiment, the interposition member 5 is fixed to the dash lower panel 61 that is the second vehicle body portion, so that the interposition member 5 functions as a reinforcing member for the pedal bracket 4 in a normal state. be able to.

  Here, in the technique of the above-mentioned patent document 1, the fixing member is arrange | positioned behind the brake pedal. For this reason, when the brake pedal is depressed, the force caused by the depression of the pedal acts on the fixing member in a direction in which the fixing member is compressed and destroyed, so that the durability and reliability of the technology is low. On the other hand, in the brake pedal support structure 1 of the present embodiment, the pedal rotating shaft 23a is fixed to the pedal bracket 4 by the screw fastening force of the screw fastening structure 27, so that the above-described fixing member is unnecessary, and the brake The durability and reliability of the pedal support structure 1 are not impaired.

  In the present embodiment, the elongated guide 110 extending in the front-rear direction and the up-down direction is described as an example as the first guide path. However, the first guide path is not limited to this, and for example, in the front-rear direction. It may be a long hole extending only. In such a structure, the pedal rotating shaft 23a does not move due to the weight of the brake pedal 2. However, even in such a structure, the pedal bracket 4 that receives a load exceeding a prescribed amount due to a frontal collision of the automobile is provided with the interposition member 5. When the pedal rotation shaft 23a is fixed to the pedal bracket 4 by the screw fastening structure 27, the pedal rotation shaft 23a moves along the elongated hole with respect to the pedal bracket 4. Since the pedal pad 22 is held down by the driver's legs, the brake pedal 2 is pushed so that the upper end of the brake pedal 2 moves rearward with respect to the pedal bracket 4 together with the pedal rotating shaft 23a. The connecting point (clevis pin 32) with the rod 3 is turned as a fulcrum. Thereby, it is suppressed that the pedal pad 22 moves back, and it can suppress that the position of the pedal pad 22 retreats.

  In the present embodiment, the notch 100 is described as an example of the second guide path. However, the second guide path is not limited to this, and may be a hole such as a long hole.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 10 is an enlarged side view of the main part showing a state where the pedal rotation shaft according to the present embodiment is located at the rear end of the notch, and FIG. 11 is a side view showing a long hole of the pedal bracket according to the present embodiment. is there. In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIGS. 10 and 11, the brake pedal support structure 1 </ b> A of the present embodiment is configured by a protrusion provided by a lock portion 111 protruding from a long hole 110 that is a first guide path in the pedal bracket 4. A certain point is mainly different from the brake pedal support structure 1 of the first embodiment. Note that the brake pedal support structure 1A of the present embodiment does not include the lock portion 121 of the interposed member 5 described in the first embodiment.

  Specifically, as shown in FIG. 11, the lock portion 111 is located near the upper side of the pedal rotation shaft 23 a located at the lower end portion (retracted position) of the long hole 110, and from the inner periphery of the long hole 110. It protrudes diagonally downward and forward. The width W of the long hole 110 at the distal end portion of the lock portion 111 is a width through which the pedal rotation shaft 23a that moves from the attachment position to the retracted position can pass.

  In the brake pedal support structure 1A of the present embodiment described above, the pedal rotating shaft 23a located at the retracted position is locked by the lock portion 111, and the pedal rotating shaft 23a is prevented from returning from the retracted position to the mounting position. The state where the pedal pad 22 is prevented from retreating can be maintained.

  Moreover, in this embodiment, since the lock part 111 was provided in the pedal bracket 4, compared with the case where a lock part is provided in the interposition member 5, the structure of the interposition member 5 can be simplified. Furthermore, since the lock portion 111 is located near the upper side of the pedal rotation shaft 23a located at the lower end portion of the long hole 110 and protrudes from the inner periphery of the long hole 110, the lock portion 111 is formed in the long hole 110. Therefore, the lock part 111 can be easily formed.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 12 is a perspective view showing a brake pedal support structure according to the present embodiment. In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The brake pedal support structure 1B of the present embodiment does not fix the interposition member 5 to the dash upper panel 62, but abuts the interposition member 5 against the steering member 130 as the second vehicle body portion at the time of a frontal collision of the automobile. The main difference from the brake pedal support structure 1 of the first embodiment is that the movement of the interposition member 5 is restricted.

  Specifically, in the present embodiment, a contact plate 55 having a specified height h is fixed to the rear end portion of the top wall 52 of the interposed member 5 so as to protrude upward. The rear end surface 55a of the contact plate 55 is positioned in front of at least a part of the steering member 130 and faces the steering member 130 in the front-rear direction. Moreover, this interposition member 5 is provided so that relative movement with the pedal bracket 4 is possible similarly to 1st Embodiment.

  The steering member 130 is located rearward in the vehicle front-rear direction with respect to the first mounting wall portion 61a (see FIG. 1) of the dash lower panel 61 that is the first vehicle body portion.

  In the brake pedal support structure 1 </ b> B having such a configuration, when the dash lower panel 61 is deformed rearward due to a frontal collision of the vehicle and the pedal bracket 4 moves rearward, the interposition member 5 moves rearward together with the pedal bracket 4. Immediately after the intervening member 5 moves rearward, the abutting plate 55 of the interposing member 5 comes into contact with the steering member 130, whereby the interposing member 5 is supported by the steering member 130, and the interposing member 5 is supported by the steering member 130. Further rearward movement is prevented, and only the pedal bracket 4 moves rearward. Accordingly, since the pedal pad 22 moves relatively forward with respect to the pedal bracket 4, it is possible to prevent the position of the pedal pad 22 from retreating at the time of a frontal collision of the automobile, as in the first embodiment. it can.

  Further, in the present embodiment, the interposition member 5 is prevented from moving backward with respect to the steering member 130 by abutting against the steering member 130, so that it is not necessary to fix the interposition member 5 directly to the vehicle body constituting member, and to the vehicle body. The mounting of the brake pedal support structure 1B is simplified, and the mounting work can be facilitated.

  In addition, although the 2nd vehicle body part which abuts the interposition member 5 was made into the steering member 130, it may be another vehicle body structural member, without restricting to this.

  By the way, the present invention is not limited to the above embodiments, and various other embodiments can be adopted without departing from the gist of the present invention.

It is sectional drawing which shows the brake pedal support structure concerning the 1st Embodiment of this invention. 1 is a perspective view showing a brake pedal support structure according to a first embodiment of the present invention. It is a front view showing a brake pedal support structure concerning a 1st embodiment of the present invention. It is an enlarged view of the II section in FIG. It is a side view which shows the pedal rotating shaft concerning the 1st Embodiment of this invention, and its periphery. It is sectional drawing along the VV line in FIG. It is a side view which shows the interposition member concerning the 1st Embodiment of this invention. It is a side view which shows the pedal bracket concerning the 1st Embodiment of this invention. It is a principal part side view which shows operation | movement of the brake pedal support structure at the time of the front collision of the motor vehicle concerning the 1st Embodiment of this invention later on in order to (a)-(d). It is a principal part expanded side view which shows the state which the pedal rotating shaft concerning the 2nd Embodiment of this invention was located in the rear-end part of a notch part. It is a side view which shows the long hole of the pedal bracket concerning the 2nd Embodiment of this invention. It is a perspective view which shows the brake pedal support structure concerning the 3rd Embodiment of this invention.

Explanation of symbols

1, 1A, 1B Brake pedal support structure 2 Brake pedal 3 Push rod (operation force transmission member)
4 Pedal bracket 5 Interposition member 7 Booster 22 Pedal pad (operation force receiving member)
23 Bolt (Male thread member)
23a Pedal rotation shaft (bolt shaft)
23b Head 25 Torsion spring (urging member)
26 Nut (Female thread member)
27 Screw fastening structure 41 1st side wall 51 2nd side wall 61a 1st attachment wall part (1st vehicle body part)
62b 2nd attachment wall part (2nd vehicle body part)
100 Notch (second guideway)
100a Rear part of notch 100b Front part of notch 110 Long hole (first guide path)
110a Mounting portion 111, 121 Locking portion 120 Dropout guide portion 130 Steering member (second vehicle body portion)

Claims (8)

A brake pedal extending in the vertical direction and having an operation force receiving member at the bottom;
A pedal rotation shaft that supports the brake pedal so as to be pivotable in the front-rear direction at the top of the brake pedal;
An operation force transmitting member connected between the operation force receiving member and the pedal rotation shaft in the brake pedal, and transmitting an operation force applied to the operation force receiving member to a booster;
A pedal bracket that supports the pedal rotation shaft and is arranged behind the first vehicle body portion and fixed to the first vehicle body portion;
A brake pedal support structure comprising:
A first guide path provided on the pedal bracket, extending rearward from an attachment position of the pedal rotation shaft in the pedal bracket and guiding the pedal rotation shaft;
An intervening member supported by a second vehicle body portion located rearward in the vehicle longitudinal direction with respect to the first vehicle body portion, and provided so as to be relatively movable with the pedal bracket;
A second guide path provided in the interposition member, through which the pedal rotation shaft located at the attachment position is inserted, and allowing backward movement of the pedal rotation shaft;
A screw fastening structure for fixing the pedal rotation shaft located at the attachment position to the pedal bracket by a screw fastening force via the interposition member;
A brake pedal support structure comprising: The screw fastening structure includes a male screw member having a head portion and a shaft portion, and a female screw member screwed into the male screw member,
The brake pedal support structure according to claim 1, wherein the pedal rotation shaft constitutes the shaft portion. The first guide path is a long hole through which the pedal rotation shaft is inserted,
The pedal bracket has a pair of left and right first side walls in which the elongated holes are formed and connected to each other,
The interposition member has a pair of left and right second side walls disposed on the outside of the pair of left and right first side walls and connected to each other.
The second guide path is a notch portion formed on each of the pair of left and right second side walls, into which the pedal rotation shaft located at the attachment position is inserted, and whose rear portion is open,
The screw fastening structure is characterized in that the pedal bracket is sandwiched between the pair of left and right second side walls by sandwiching the pair of left and right second side walls by the head and the female screw member. Item 3. The brake pedal support structure according to Item 2. The first guide path has an attachment portion that restricts movement of the attachment position in the vehicle front-rear direction, and is inclined rearward and obliquely downward from the attachment portion.
The second guide path has a front portion that restricts movement of the mounting position in the vehicle vertical direction, and is expanded rearward and obliquely downward from the front portion.
The brake pedal is configured to move the pedal rotation shaft rearward from the attachment position along the first guide path by the weight of the brake pedal when receiving a load exceeding a specified value in the rear of the vehicle. The brake pedal support structure according to any one of claims 1 to 3.   5. The brake pedal support structure according to claim 4, wherein the second guide path includes a drop-off guide portion inclined obliquely downward and rearward from the front portion.   The locking part which locks the pedal rotation axis located in the retracted position behind the attachment position and prevents the pedal rotation axis from returning to the attachment position from the retracted position. The brake pedal support structure according to any one of 1 to 5.   The brake pedal support structure according to claim 6, wherein the lock portion is provided in the interposition member.   The brake pedal support structure according to claim 6, wherein the lock portion is provided so as to protrude from the first guide path in the pedal bracket.

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