JP5052180B2 - Pedal support structure for automobiles - Google Patents

Description

  The present invention relates to an automobile pedal support structure that supports an automobile brake pedal, clutch pedal, and the like.

  A brake pedal that is actuated by an occupant's stepping force is disposed in front of the driver's seat in the vehicle interior. This brake pedal is composed of a pedal pad as a tread surface to which the occupant's pedaling force is applied, and a pedal lever having the pedal pad at the lower end and extending in a substantially vertical direction, and the upper end of the pedal lever partitions the engine room and the vehicle compartment. It is pivotally supported by a pedal bracket attached to the toe board. Further, a master back for increasing the occupant's pedaling force applied to the pedal pad is disposed on the engine room side of the toe board, and the master back and the pedal lever are connected via a push rod.

  However, in the brake pedal configured as described above, when an external force of a predetermined level or more is applied from the front side of the vehicle body due to a collision or the like, the master back and the toe board are pushed toward the vehicle interior side by a power unit that retreats by the external force. When the brake pedal moves rearward, an excessive impact load may be applied to the occupant's foot placed on the pedal pad of the brake pedal.

  As a countermeasure against this, various pedal support structures have been proposed. For example, in the pedal support structure disclosed in Patent Document 1, as schematically shown in FIG. 11, the master back 111 is disposed on the front surface of the toe board 101, that is, the engine room side, and the front end of the pedal bracket 112 together with the master back 111 is the toe board. 101 is fixed. On the other hand, the rear end 113 of the pedal bracket 112 is coupled by the fixing means 114 so as to be detachable when retracted with respect to the bulkhead 102.

  The bulkhead 102 is formed with an inclined surface 103 that faces the rear end 113 of the pedal bracket 112 and inclines rearwardly downward. An upper end of the brake pedal 120 is supported by the pedal bracket 112 via a pin 119 so as to be rotatable in the front-rear direction, and a push rod 123 extending rearward from the master back 111 is connected to an intermediate portion of the brake pedal 120.

  When a car equipped with this structure collides, when the master back 111 moves backward while deforming the toe board 101 by a power unit that moves backward, the pedal bracket 112 fixed to the toe board 101 moves backward with respect to the bulkhead 102. To do. By the rearward movement of the pedal bracket 112, the coupling between the pedal bracket 112 and the bulkhead 102 by the fixing means 114 is released, and the pedal bracket 112 is separated from the bulkhead 102 and falls off.

  The pedal bracket 112 separated from the bulkhead 102 further moves rearward, and the rear end 113 abuts against the inclined surface 103 of the bulkhead 102 and is pushed downward. As a result, the brake pedal 120 supported by the pedal bracket 112 rotates so that the pedal pad 121 provided at the lower end thereof moves forward. Thus, even if the master back 111 and the pedal bracket 112 move rearward due to a collision, the lower end of the brake pedal 120 rotates forward so as to cancel the movement, so that it is placed on the pedal pad 121 of the brake pedal 120 at the time of the collision. The load applied to the occupant's feet can be reduced.

JP 10-310036 A

  According to the brake pedal support structure described in Patent Document 1, the pedal bracket 112 is separated from the bulkhead 102 when the pedal bracket 112 fixed to the toe board 101 is moved rearward with respect to the bulkhead 102 by a collision. When the pedal bracket 112 further moves rearward and the rear end 113 comes into contact with the inclined surface 103, the rear end 113 is pushed down along the inclined surface 103, and the brake pedal 120 supported by the pedal bracket 112 on the vehicle interior side. The movement to can be suppressed.

  However, when the master back 111 moves rearward due to a collision, the brake pedal 120 that is rotatably supported by the pedal bracket 112 via the push rod 123 is pushed rearwardly with impact as the master back 111 moves rearward. The pedal pad 121 provided at the lower end thereof is rotated so as to move backward. There is a concern that the rotation of the brake pedal 120 causes a shocking excessive load on the occupant's foot placed on the pedal pad 121 to damage the occupant's foot, and the occupant's safety cannot be sufficiently achieved. .

  Accordingly, an object of the present invention made in view of such a point is to provide an automotive pedal support structure excellent in safety capable of effectively reducing a load on an occupant due to movement of a pedal at the time of a collision.

The pedal support structure for an automobile according to claim 1, which achieves the above object, includes a pedal bracket that pivotally supports an upper end of a pedal lever having a pedal pad at a lower end, and is attached to the toe board. In an automotive pedal support structure in which the tip of a push rod protruding from the arranged master back is connected to the pedal lever, a stopper base portion whose base end is fixed to the pedal bracket, and a front end edge that is behind the pedal lever A stopper bracket having a plate-like abutting portion facing the edge and a fragile portion formed by a U-shaped notch extending in the vehicle width direction in a plate shape connecting the corresponding contact portion to the stopper base portion. A rear end of the pedal lever that moves backward by an external force input from the front input to the master back comes into contact with a front end edge of the contact portion. Which comprises suppressing the rearward movement of the pedal lever by the weak portion being shaped granted.

According to the present invention, the pedal lever, which is rotatably supported by the pedal bracket as the master back or toe board moves rearward due to a collision or the like, is pushed backward by the push rod, and the trailing edge is formed on the stopper bracket. When the abutting portion is brought into contact, the abutting portion moves backward while absorbing the impact energy due to the deformation of the weak portion formed by the U-shaped notch extending in the vehicle width direction with a plate shape, and the pedal lever suddenly moves. Can prevent the backward movement. Thereby, the impact to the pedal pad provided at the lower end of the pedal lever is alleviated, and the load applied to the foot of the occupant placed on the pedal pad is reduced. As a result, the load on the passenger due to the rearward movement of the pedal at the time of the collision can be effectively reduced.

  According to a second aspect of the present invention, in the pedal support structure for an automobile according to the first aspect, a switch holder for attaching a pedal lever operation detection switch having a proximal end attached to the stopper base and extending forward. Is provided, and the tip of the switch holder is set at a position behind the front edge of the contact portion.

  According to this invention, the front end edge of the abutting portion with which the pedal abuts is positioned in front of the tip of the switch holder attached to the stopper base, so that the pedal lever operation detection switch attached to the switch holder is not attached. When moving the pedal bracket to be transported or the vehicle body on which the pedal bracket is mounted, even if the pedal lever is rotated, the rear edge of the pedal lever comes into contact with the front edge of the abutting portion and the rotation is restricted. The pedal lever can be prevented from coming into contact with the switch holder. As a result, the switch holder can be prevented from being damaged or the switch holder from falling off due to the impact of the pedal lever or the like, and the quality can be ensured and the efficiency of the assembly work can be ensured.

  According to a third aspect of the invention, in the pedal support structure for an automobile according to the first or second aspect, a catcher provided on a vehicle body member having an inclined surface that faces the toe board and moves rearward as it descends; The upper end of the stopper bracket is rotatably supported, the front part is coupled to the toe board, and the rear end part has a pedal bracket body facing the inclined surface of the catcher with a gap, The rear end portion of the pedal bracket body that moves rearward by an external force from the front input to the toe board is guided by the inclined surface of the catcher and the rear end portion of the pedal bracket body that moves backward is guided downward by the inclined surface. It is characterized by doing.

  According to the present invention, in addition to the effect of the first or second aspect, when the pedal bracket body is retracted by an external force input to the toe board due to a collision or the like, the rear end portion of the pedal bracket body that moves backward is caught by the guide means. The rear end portion of the pedal bracket body is surely and smoothly pushed down along the inclined surface of the catcher, thereby reducing the load applied to the occupant's foot mounted on the pedal pad. it can.

  According to the present invention, the pedal lever that is rotatably supported by the pedal bracket as the master back or the toe board moves rearward due to a collision or the like is pushed backward by the push rod, and the trailing edge of the pedal lever is formed on the stopper bracket. Contact with the front edge of the abutting portion, the abutting portion moves rearward due to deformation of the weakened portion, the impact on the pedal pad is relieved, and the load applied to the occupant's foot placed on the pedal pad is reduced .

  An embodiment of a pedal support structure for an automobile according to the present invention will be described with reference to FIGS. 1 to 10 by taking a case where the pedal is a brake pedal as an example.

  1 is an overall side view schematically showing a structure around a support portion of a brake pedal device, FIG. 2 is an overall plan view in which a part of FIG. 1 is omitted, FIG. 3 is an enlarged view of a portion A in FIG. 3 is an enlarged view of part B, FIG. 5 is a cross-sectional view taken along the line II of FIG. 4, FIG. 6 is an exploded perspective view of the main part, and FIGS. In addition, the arrow F in each figure shows a vehicle body front direction, and the arrow W shows a vehicle width direction.

  As shown in FIG. 1, the toe board 1 that partitions the engine room E and the passenger compartment C extends substantially in the vertical direction, and each side edge thereof is coupled to left and right front pillars (not shown). The upper end edge of the toe board 1 is coupled to the lower surface of the bulkhead 2 that is substantially horizontal and extends in the vehicle width direction, and the lower end edge is coupled to a floor panel (not shown). The upper surface of the lower surface of the bulkhead 2 is connected to the bulkhead 2 by the front surface 4 and the lower surface 5 which are inclined downward and the rear surface 6 is joined to the bulkhead 2. There is provided a pedal fixing bracket 3 which is open and has a substantially U-shaped cross section and is continuous in the vehicle width direction. A tubular steering support beam 7 extends in the vehicle width direction behind the pedal fixing bracket 3 and is installed between the left and right front pillars. The steering support beam 7 is a vehicle body member having extremely great rigidity that supports the steering column 8. The steering support beam 7 is provided with a catcher 61 having an inclined surface 62 that faces the toe board 1 and moves backward as it descends.

  An opening (not shown) is formed in the toe board 1, a master back 9 is disposed on the engine room E side of the toe board 1 corresponding to the opening, and the master back 9 is opposed to the master back 9 on the cabin C side of the toe board 1. A pedal bracket 10 that supports the pedal 55 is disposed.

  Next, the pedal bracket 10 will be described with reference to FIGS. 1 to 6.

  The pedal bracket 10 mainly includes a pedal bracket body 11 whose front end is fastened together with the master back 9 to the toe board 1 by bolts, a stopper bracket 31, and a pedal bracket support portion 41 that attaches the pedal bracket body 11 to the pedal fixing bracket 3. The brake pedal 55 is supported by the pedal bracket body 11.

  The pedal bracket body 11 includes a front pedal bracket body 12 and a rear pedal bracket body 21 coupled to the rear portion of the front pedal bracket body 12.

  The front pedal bracket main body 12 has a substantially rectangular plate-shaped front mounting portion 13 having an opening 13a formed at the center thereof, and a front end joined to the front mounting portion 13 so as to be lowered from the upper surface portion 15 and both side edges thereof. It is formed by a pedal support portion 14 that is bent in the shape of the pedal and is formed in a substantially U-shaped cross section that is open at the opposite sides by opposing side surface portions 16 and 17 and is inclined rearward and extending in the front-rear direction. Pedal mounting holes are formed in the rear portions of the side surface portions 16 and 17 so as to face each other.

  The rear pedal bracket main body 21 is bent and formed downward from the rear edge of the base end portion 22, and a base end portion 22 that is placed and coupled to the rear end portion of the upper surface portion 15 of the front pedal bracket main body 12 from above. A stepped portion 23 that faces the front surface 4 of the pedal fixing bracket 3, a rectangular planar joining surface 24 that is bent at the lower edge of the stepped portion 23 and extends substantially rearward, and a rear surface of the joining surface 24. A rear end portion 25 that is bent downward from the edge and is inclined downward and facing the inclined surface 62 of the catcher 61 attached to the steering support beam 7 is continuously formed in the front-rear direction. The flanges 26 and 27 are continuously bent downward on both side edges of the base portion 22, the step portion 23, and the joint surface 24.

  A pair of bolt holes 28 are juxtaposed in the vehicle width direction on the joint surface 24. Each bolt hole 28 is located on the rear side, and the shaft portion of the coupling bolt 29 has a small gap 28a extending in the front-rear direction, and the head of the coupling bolt 29 penetrates on the front side. A large diameter portion 28b that is long in the front-rear direction is formed continuously.

  The front pedal bracket main body 12 and the rear pedal bracket main body 21 formed in this way are the upper surface portion 15 of the pedal support portion 14 and the rear end portions of the side surface portions 16 and 17 formed on the front pedal bracket main body 12. The pedal bracket whose front end range is inclined forward and bent and the rear range extends substantially horizontally by welding, etc. by overlapping the base end portion 22 and the flanges 26, 27 formed on the rear pedal bracket body 21. A main body 11 is formed.

  As shown in FIGS. 3 to 6, the stopper bracket 31 is bent forward and extends upward from both side edges of a rectangular flat stopper base 32 formed at the front end to face the rear edge 56a of the pedal lever 56. A pedal mounting hole (not shown) is formed in the upper portion of the mounting portion 33 serving as a base end. The upper portions of the mounting portions 33 are overlapped with the rear portions of the side surface portions 16 and 17 of the front pedal bracket body 12, and the pedal mounting holes are associated with each other. Further, a rearwardly rising connecting portion 34 that gradually displaces upward as it moves rearward from the upper edge of the stopper base 32 is extended, and the upper portion of the connecting portion 34 is the lower surface of the joining surface 24 of the rear pedal bracket body 21 and the rear. Joined to the end 25.

  Further, a pedal abutting portion 35 is formed at the lower end of the stopper bracket 31 and has a plate shape extending in the forward direction from the lower edge of the stopper base 32 and is continuous with the lower edge of each mounting portion 33 on both sides.

  As shown in FIGS. 4 and 5, the pedal contact portion 35 includes a base portion 36 connected to the lower edge of the stopper base portion 32 and the lower edge of each mounting portion 33, and projects forward from the base portion 36 to extend in the vehicle width direction. The contact portion 38 is connected via a fragile portion 37 formed by an existing U-shaped notch 37 a, and the front end edge 38 a of the contact portion 38 faces the rear edge 56 a of the pedal lever 56.

  A switch mounting hole 32 a is opened in the stopper base 32. A fixing portion 58b formed at the base end of a switch holder 58 made of resin and formed in a cylindrical shape is attached to the switch mounting hole 32a. The front end 58a of the switch holder 58 attached to the stopper base 32 is located behind the front end edge 38a of the pedal contact portion 35. A stop lamp switch 59 that is turned on when the stopper piece provided on the pedal lever 56 is released by stepping on the pedal pad 57 to the switch holder 58 to turn on the stop lamp is detachably disposed.

  On the other hand, the stop lamp switch 59 is provided with a switch main body 59a held by a switch holder 58 and a contact 59b that can be moved in and out of the switch main body 59a. When an excessive impact load acts on the stop lamp switch 59 from the front, the fixing portion 58b of the switch holder 58 that holds the stop lamp switch 59 is damaged by the load, and the stop base switch 32 together with the stop lamp switch 59 is damaged. It is pushed out from the switch mounting hole 32 a and falls off from the stopper base 32.

  By means of support bolts 39 and nuts 40 as pedal support means that penetrate the pedal mounting holes of the both side surface portions 16, 17 of the front pedal bracket body 12 and the mounting portions 33 of the stopper bracket 31 that are reinforced with the stopper bracket 31 spanned. The brake pedal 55 is pivotally supported. The brake pedal 55 is provided with a pedal pad 57 at the lower end of a pedal lever 56 that is pivotally supported by a support bolt 39 and extends downward, and is provided by a return spring (not shown) wound around the support bolt 39. It is biased in the direction opposite to the direction in which the treading force is applied.

  The pedal bracket support portion 41 includes a mounting base portion 42 that is formed with a bolt hole 43 and coupled to the lower surface 5 of the pedal fixing bracket 3 by a mounting bolt 51, and a step portion that is bent downward from the rear edge of the mounting base portion 42. 44, a rectangular flat support surface 45 bent substantially horizontally from the lower end of the stepped portion 44, and a catcher 61 bent downward from the rear edge of the support surface 45 and attached to the steering support beam 7. The tip part 47 which inclines in the back-down direction facing the inclined surface 62 is continuously formed in the front-rear direction. A pair of bolt holes 46 are juxtaposed in the vehicle width direction on the support surface 45 so as to correspond to the small diameter portions 28a of the respective bolt holes 28 formed in the joint surface 24 of the rear pedal bracket body 22.

  The bolt hole 28 formed in the joint surface 24, the bolt hole 46 formed in the support surface 45, the coupling bolt 29 passing through the bolt holes 28, 46, and the nut 30 screwed into the coupling bolt 29. A coupling means for coupling the joining surface 24 and the support surface 45 is formed.

  Further, a notch formed in the flange 25 of the rear pedal bracket body 21 continues from the side edge of the mounting base portion 42 on the steering column 8 side to the side edge of the joint surface 45 via the side edge of the stepped portion 44. A flange 48 reaching the vicinity of 25a is bent downward. On the other hand, a flange 49 that continues from the side edge of the mounting base portion 42 on the side away from the steering column 8 to the side edge of the stepped portion 44 and the side edge of the joint surface 45 is bent downward. Is done.

  The support surface 45 and the flanges 48 and 49 constitute guide means for guiding the distal end portion 25 of the rear pedal bracket body 21 that is relatively moved rearward by an external force from the front side to the inclined surface 62 of the catcher 61.

  For mounting on the vehicle body, the brake pedal 55 is attached to the pedal bracket 10 formed by integrally connecting the stopper bracket 31 to the pedal bracket body 11 formed by connecting the front pedal bracket body 12 and the rear pedal bracket body 21. The stop lamp switch 59 is attached to the switch holder 58 attached to the stopper bracket 31. Further, the joint surface 24 of each of the rear pedal bracket body 21 and the pedal bracket support portion 41 and the small diameter portion 28a of the bolt hole 28 formed on the support surface 45 and the bolt hole 46 are made to correspond to each other. The support surface 45 of the pedal bracket support portion 41 is overlapped with the joint surface 24 from above, and the flanges 48 and 49 are fitted to face each other so as to sandwich the flanges 26 and 27. In a state where the small diameter portion 28a of the bolt hole 28 and the bolt hole 46 are positioned, the front end portion 47 of the pedal bracket support portion 41 protrudes rearward from the rear end portion 25 of the rear pedal bracket main body 21 and is separated in the front-rear direction. Opposite with a gap.

  The joint surface 24 and the mounting surface 45 of the rear pedal bracket 21 thus positioned are integrally coupled by a coupling means including a coupling bolt 29 and a nut 30 penetrating the small diameter portion 28a of the bolt hole 28 and the bolt hole 46. The fastening force of the coupling bolt 29 and the nut 30 is such that the rear bracket body 21 is pressed against the pedal bracket when a load is applied when the tip 47 abuts against the inclined surface 62 of the catcher 61 provided on the steering support beam 7 at the time of collision. It is set to such an extent that it can slide backward with respect to the support portion 41.

  The coupling between the rear pedal bracket main body 21 and the pedal bracket support portion 41 is performed in advance by connecting the small-diameter portion 28a and the bolt hole 46 of the bolt hole 28 outside the vehicle cabin where a working space can be secured and the workability is excellent. Since the rear pedal bracket body 22 and the pedal bracket support portion 41 are positioned in correspondence with each other by the coupling bolt 29 and the nut 30, the coupling bolt 29 and the nut are excellent in workability, high accuracy, and appropriate. The pedal bracket support portion 41 can be attached to the rear pedal bracket main body 21 with the tightening force of 30, and the reliability thereof can be ensured.

  The pedal bracket 11 to which the brake pedal 55 and the pedal bracket support portion 41 are assembled in this manner is such that the front mounting portion 13 formed at the front end thereof is fastened together with the master back 9 to the toe board 1 with bolts, and The pedal fixing bracket is inserted from the large diameter portion 28b of the bolt hole 28 formed in the joint surface 24 of the rear pedal bracket body 21 and passes through the bolt hole 43 formed in the mounting base portion 42 of the pedal bracket support portion 41. 3 is attached to the bulkhead 2 via the pedal fixing bracket 3 by means of a mounting bolt 51 that is screwed into a welding nut 52 that is attached in advance to the lower surface 5 of 3. Thereafter, the tip of the push rod 60 protruding from the master back 9 is pivotably coupled to the intermediate portion of the pedal lever 56 by a clevis pin 60a.

  In this mounting operation, the front end of the pedal bracket 11 is attached to the toe board 1 by fastening the front attaching part 13 together with the master back 9 to the toe board 1 with bolts as in the conventional case, and the rear part of the rear pedal bracket main body 21 is attached. A mounting bolt 51 is inserted from a large-diameter portion 28 b of the bolt hole 28 formed in the joint surface 24, and the mounting base 42 of the pedal bracket support portion 41 is screwed and attached to a welding nut 52 attached to the pedal fixing bracket 3. For this reason, high-precision positioning work is not required in vehicle-mounted work where the work space is limited, and excellent mounting workability can be ensured. Further, the bolt hole 18 also has a function as a work hole, and it is not necessary to separately form a work hole in the joint surface 24, so that the structure of the rear pedal bracket body 21 can be simplified and the rigidity can be ensured.

  As shown in FIGS. 1 and 3, the brake pedal device configured as described above has the front end of the pedal bracket body 11 that pivotally supports the upper end of the pedal lever 56 coupled to the toe board 1 and the rear end coupled to the bulkhead 2. It is installed with sufficient mounting rigidity, and is attached to the vehicle body with the tip 47 of the pedal bracket support 41 facing the inclined surface 62 of the catcher 61 attached to the steering support beam 7 with a gap. It is done.

  The brake pedal 55 is normally held at a position where a stopper piece provided on the pedal lever 56 is pressed against a switch body 59a of a stop switch 59 attached to the stopper base 32 of the stopper bracket 31 by a return spring. At this time, the front end edge 38 a formed on the contact portion 38 of the pedal contact portion 35 faces the rear edge 56 a of the pedal lever 56 and a slight gap is maintained between the front edge 38 a and the rear edge 56. Further, the stop lamp 59 is turned off when the contact 59b is pushed into the switch body 59a, and the stop lamp is turned off.

  In the brake operation, the pedal lever 56 rotates forward against the urging force of the return spring with the support bolt 39 as the rotation center by the pedaling force of the occupant as the pedal pad 57 is depressed, and the push rod 60 is pushed. The braking device is operated by increasing the pedaling force of the occupant by the master back 9. As the pedal lever 56 is rotated forward by the pedal force, the stopper piece is separated from the stop lamp switch 58, the contact 59b protrudes, the stop lamp switch 59 is turned on, and the stop lamp is lit.

  Further, when the pedaling force on the pedal pad 57 is released, the pedal lever 56 is rotated rearward about the support bolt 39 by the biasing force of the return spring, and the stopper piece pushes the contact 59b of the stop lamp switch 59. The switch body 59a abuts against the tip of the switch body 59 and is stopped and held at that position, and the push rod 60 is released to stop the brake operation. The stop lamp switch 59 is turned off and the stop lamp is turned off.

  On the other hand, when an external force of a predetermined level or more is applied from the front due to a collision or the like, the master back 9 and the toe board 1 are pushed into the normal state or the inside of the passenger compartment C by a power unit that retreats by the external force.

  As the master back 9 or the toe board 1 moves backward, the pedal lever 56, whose upper end is rotatably supported by the front pedal bracket body 12 by the bolt 39, is pushed backward by the push rod 60, and moves backward. The stop lamp switch 59 is pushed together with the switch holder 58 by the stopper piece of the lever 56 and pushed out from the switch mounting hole 32a of the stopper base 32, and the pedal lever 56 has a rear edge 56a formed at the lower end of the stopper bracket 31. It abuts on the front edge 38 a of the abutting portion 38 of the abutting portion 35.

  When the pedal lever 56 that moves backward contacts the front end edge 38 a of the contact portion 38 formed on the pedal contact portion 35, the impact load causes deformation to the weak portion 37, and the deformation of the weak portion 37 gives impact energy. While absorbing, the contact portion 38 moves backward to prevent the pedal lever 56 from moving suddenly backward. Furthermore, the rearward movement of the contact portion 38 is prevented by the end of the deformation of the weak portion 37 by the contact portion 38 that moves backward or the deformation of the weak portion 37 and the contact portion 38 contacts the base portion 36, thereby preventing the pedal lever 56 from moving backward. Regulates rearward movement. As a result, the impact of the rearward movement of the pedal pad 57 provided at the lower end of the pedal lever 56 whose upper end is rotatably supported by the front pedal bracket body 12 is reduced, and the foot of the occupant placed on the pedal pad 57 is reduced. The load applied to is reduced.

  FIG. 10 shows a correlation characteristic between the impact load P acting on the pedal pad 57 and the reverse stroke S of the pedal pad 57 by a solid line L. The impact load P and the reverse stroke of the pedal pad when the pedal contact portion 35 is not provided. A correlation with S is indicated by a broken line L1.

  In the case where the pedal contact portion 35 is not provided, as indicated by the broken line L1, the impact load P acting on the pedal pad 57 increases abruptly and increases its maximum value Pmax and rapidly decreases to the pedal pad 57. There is a concern that a large load is applied to the occupant's foot, which places a large burden on the occupant's foot.

  On the other hand, according to the present embodiment including the pedal abutting portion 35, as shown by the solid line L, when the pedal lever 56 abuts on the front end edge 38 a of the abutting portion 38 formed on the pedal abutting portion 35, Since the fragile portion 37 deformed and imparted by the impact load allows the rearward movement of the contact portion 38 while absorbing the impact energy, the maximum value Pmax of the impact load P acting on the pedal pad 57 is relatively small and moderate. The impact load is reduced. Further, when the rearward movement of the contact portion 38 is completed by the deformation of the weak portion 37 being terminated by the contact portion 38 contacting the base portion 36, the rearward movement of the pedal lever 56 is stopped by the contact portion 38, and the pedal is stopped. Excessive retreat of the lever 56 is prevented. Thereby, the load applied to the occupant's foot placed on the pedal pad 57 is greatly reduced, and the load acting on the occupant's foot is reduced.

  At this time, the maximum value Pmax of the impact load P and the reverse stroke S of the pedal pad 57 can be set by the rigidity of the fragile portion 37. That is, since it is set according to the size and shape of the notch 37a forming the fragile portion 37, it can be easily tuned.

  Further, when the master back 9 and the toe board 1 are pushed to the inside of the passenger compartment C as shown in FIG. 7 from the normal state shown in FIG. The portion of the pedal support portion 14 that is formed in the U-shape of the main body 11 and has a relatively low rigidity is deformed, and the pedal fixing bracket 3 is deformed and the pedal bracket 11 and the brake pedal 55 are stabilized in the rearward direction. As shown in FIG. 8, the distal end portion 47 of the pedal bracket support portion 41 abuts on the inclined surface 62 of the catch 61 and is received.

  In this state, the tip end portion 47 of the pedal bracket support portion 41 abuts on the inclined surface 62 of the catcher 61 and the pedal bracket support portion 41 is held by the pedal fixing bracket 3 and the catcher 61. When 1 moves backward, the joint surface 24 of the rear pedal bracket body 21 is guided along the joint surface 45 of the pedal bracket support portion 41 and slides to move backward, and the rear end portion of the rear pedal bracket body 21 is moved. 25 abuts on the inclined surface 62 via the tip 47 of the pedal bracket support 41. This rearward movement of the rear pedal bracket body 21 is caused by the coupling bolt 29 passing through the small diameter portion 28a of the bolt hole 28 formed in the joint surface 24 and the bolt hole 43 formed in the support surface 45 of the pedal bracket support portion 41, and The coupling state by the nut 30 is maintained, and flanges 26 and 27 formed along both sides of the rear pedal bracket 21 are guided to be sandwiched by both flanges 48 and 49 of the pedal bracket support portion 41, and the joint surface 24 and the support are supported. Combined with the fact that the surface 25 extends substantially along the front-rear direction and extends in substantially the same direction as the retraction direction of the pedal bracket body 11, complicated behavior is restricted and the backward movement in a stable state is maintained. Is done.

  Further, when the master back 9 and the toe board 1 are moved backward and the rear pedal bracket main body 21 is moved rearward, as shown in FIG. 8, the stepped portion 23 of the rear pedal bracket main body 21 is inclined downwardly as shown in FIG. 3 abuts against the front face 4 of Due to this contact, the stepped portion 23 and the front surface 4 are inclined so that a pressing force is applied to the rear pedal bracket body 21.

  When the stepped portion 23 inclined to the front surface 3 of the pedal fixing bracket 3 is in contact with the pressing force applied to the rear pedal bracket main body 21 and the pedal bracket main body 11 is further retracted, the pedal fixing bracket 3 is coupled. The joint surface 24 of the rear pedal bracket 21 moves backward with respect to the pedal bracket support portion 41, and a coupling bolt 29 penetrating a bolt hole 46 formed in the joint surface 45 of the pedal bracket support portion 41 is formed on the joint surface 24. The formed bolt hole 28 is pulled out from the small diameter portion 28a toward the large diameter portion 28b, and the rear pedal bracket body 21 is detached from the pedal bracket support portion 41.

  The separation of the rear pedal bracket body 21 from the pedal bracket support portion 41 is performed when the coupling bolt 29 is in a state where a pressing force is applied to the pedal bracket body 21 by the contact between the front surface 3 of the pedal fixing bracket 3 and the step portion 23. Since the bolt hole 28 is pulled out from the small-diameter portion 28a to the large-diameter portion 28b, it is reliably performed.

  The rear end portion 25 of the rear pedal bracket main body 21 that is detached from the pedal bracket support portion 41 is shown along the front end portion 47 of the pedal bracket support portion 41 and the inclined surface 62 of the catcher 61 as the pedal bracket main body 11 is retracted. It is pushed down as shown in FIG.

  When the rear pedal bracket main body 21 is pushed down by the front end 47 of the pedal support 41 and the inclined surface 62 of the catcher 61, the stopper base 32 and the joint surface 24 of the stopper bracket 31 coupled to the rear end of the front pedal bracket main body 12 are used. By laying the connecting portion 34 between them, the rigidity of the joint surface 24 can be secured, and the load due to the retreat of the toe board 1 can be efficiently transmitted to the distal end portion 25 via the pedal bracket body 11. Further, the rear end portion 25 of the pedal bracket main body 11 and the front end portion 47 of the pedal bracket support portion 41 are inclined rearwardly downward, whereby the rear end portion 25 of the pedal bracket main body 11 is changed to the front end portion 47 of the pedal bracket support portion 41 and It can be smoothly guided downward along the inclined surface 62 of the catcher 61, and the rear end portion 25 of the pedal bracket body 11 can be reliably pushed down.

  As a result, the brake pedal 55 supported by the pedal bracket body 11 rotates so that the pedal pad 57 provided at the lower end of the pedal lever 56 moves forward. Thus, even if the master back 9 and the pedal bracket body 11 move rearward due to a collision, the pedal lever 56 of the brake pedal 55 and the pedal pad 57 provided at the lower end of the pedal lever 56 are moved forward to cancel the movement. Therefore, it is possible to reduce the load applied to the occupant's foot placed on the pedal pad 57 of the brake pedal 55 in the event of a collision. Moreover, it can avoid that the pedal pad 57 of the brake pedal 55 interferes with a passenger | crew's leg part.

  Therefore, according to the present embodiment configured as described above, when an external force of a predetermined level or more is applied from the front of the vehicle body due to a collision or the like, the master back 9 or the toe board 1 is pushed toward the vehicle interior side by a power unit that retreats by the external force. When the pedal lever 56 of the brake pedal 55 is moved rearward via the push rod 60 in the initial stage of the reverse movement of the master back 9, the pedal lever 56 formed at the lower end of the stopper bracket 31 has a rear edge 56a. The abutting portion 38 abuts on the front end edge 38a of the abutting portion 38, and the abutting portion 38 moves backward while absorbing the impact energy by the deformation of the fragile portion 37, allowing the pedal lever 56 to move backward, and further the fragile portion As the deformation of 37 is completed, the rearward movement of the contact portion 38 is prevented and the rearward movement of the pedal lever 56 is prevented. As a result, the impact of the rearward movement of the pedal pad 57 provided at the lower end of the pedal lever 56 whose upper end is rotatably supported by the front pedal bracket body 12 is reduced, and the foot of the occupant placed on the pedal pad 57 is reduced. The load applied to is reduced.

  Further, when the pedal bracket body 11 that supports the brake pedal 55 is retracted, first, the tip end portion 47 of the pedal bracket support portion 41 abuts against the inclined surface 62 of the catch 61, and the pedal bracket support portion 41 is fixed to the pedal. It is held by the bracket 3 and the catcher 61. Since the pedal bracket body 11 is moved backward by being guided by the held pedal bracket support portion 41, the behavior of the pedal bracket body 11 is stabilized, and the rear end portion 25 of the rear pedal bracket body 21 is reliably and efficiently operated. Therefore, the brake pedal 55 can be reliably pushed forward along the inclined surface 62 of the catcher 61, and the load applied to the occupant's foot placed on the pedal pad 57 can be reduced.

  Further, the brake pedal 55 is pushed down along the distal end portion 47 of the pedal bracket support portion 41 and the inclined surface 62 of the catcher 61 at a timing at which the pedal lever 56 is prevented from moving backward by the pedal contact portion 35 formed on the stopper bracket 31. , And it is possible to easily tune the timing at which the brake pedal 55 is dropped off, so that the desired effect can be achieved and the safety of the occupant can be improved.

  Further, since the front end edge 38a of the pedal abutting portion 35 formed on the stopper bracket 31 is positioned in front of the tip 58a of the switch holder 58 attached to the stopper base portion 32, the stop lamp switch 58 is not attached to the switch holder 58. When the pedal bracket 10 that is transported in the state is transported or mounted on the vehicle, the brake lever 56 is supported by the front pedal bracket body 21 so as to be rotatable, and is regulated by contacting the front edge 38a of the pedal contact portion 35. The brake lever 56 can be prevented from coming into contact with the switch holder 58. As a result, the switch holder 58 can be prevented from being damaged and dropped off by hitting the brake bar 56, and the quality can be ensured and the assembly work can be efficiently performed.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of invention. For example, it is also possible to edge 56a after the front end edge 38a on the pedal lever 56 at the abutting portion 38 of the pedal abutment 35 formed at the lower end of the scan stopper bracket 31 is formed engageable recess.

  Moreover, although the brake support structure has been described as an example in the above embodiment, the present invention can also be applied to a clutch pedal support structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view of a periphery of a support portion of a brake pedal device illustrating an example of a pedal support structure for an automobile according to the present invention in which a pedal is a brake pedal. It is the whole top view which omitted a part of Drawing 1. It is the A section enlarged view which shows the principal part of FIG. It is the B section enlarged view of FIG. It is the II sectional view taken on the line of FIG. It is a disassembled perspective view which shows the principal part. It is an operation explanatory view. It is an operation explanatory view. It is an operation explanatory view. FIG. 4 is a correlation diagram between an impact load and a reverse stroke of a brake pedal. It is explanatory drawing which shows the outline | summary of the conventional brake pedal support structure for motor vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toe board 2 Bulkhead 3 Pedal fixed bracket 7 Steering support beam 9 Master back 10 Pedal bracket 11 Pedal bracket main body 12 Front side pedal bracket main body 14 Pedal support part 21 Rear side pedal bracket main body 25 Rear end part 31 Stopper bracket 32 Stopper base 35 Pedal Contact part 36 Base part 37 Fragile part 37a Notch 38 Contact part 38a Front edge 55 Brake pedal 56 Pedal lever 56a Rear edge 57 Pedal pad 58 Switch holder 58b Fixing part 58a Tip 59 Stop lamp switch (switch)
61 Catcher 62 Inclined surface

Claims (3)

The upper end of a pedal lever with a pedal pad at the lower end is pivotally supported, and a pedal bracket that is attached to the toe board is provided. The tip of a push rod protruding from the master back disposed on the toe board is connected to the pedal lever. In the connected automobile pedal support structure,
A stopper base portion whose base end is fixed to the pedal bracket, a plate-like contact portion whose front end edge faces the rear edge of the pedal lever, and a plate shape connecting the corresponding contact portion to the stopper base in the vehicle width direction A stopper bracket having a fragile portion formed by a U-shaped notch extending to
The rear end of the pedal lever that moves backward due to an external force input from the front input to the master back restrains the rearward movement of the pedal lever by the fragile portion that is deformed and applied to the front end edge of the contact portion. A structure for supporting a pedal for an automobile.   The stopper base is provided with a switch holder for attaching a pedal lever operation detection switch with a base end attached to the front end, and the tip of the switch holder is located behind the front edge of the contact portion. The pedal support structure for an automobile according to claim 1, wherein the pedal support structure is set at a position. A catcher provided on a vehicle body member having an inclined surface that faces the toe board and moves backward as it descends;
A pedal bracket body that pivotally supports the upper end of the pedal lever and is provided with the stopper bracket, the front portion is coupled to the toe board, and the rear end portion is opposed to the inclined surface of the catcher with a gap. Have
The rear end portion of the pedal bracket body that moves rearward by an external force from the front input to the toe board is guided by the inclined surface of the catcher and the rear end portion of the pedal bracket body that moves backward is guided downward by the inclined surface. The automobile pedal support structure according to claim 1, wherein the pedal support structure is for a vehicle.

Images