JP2016157424A - Vehicle brake pedal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle brake pedal device that can reduce travel distance toward the rear of a brake pedal pad when a partition wall for supporting a pedal bracket is deformed backward, and can be mounted also to a vehicle (for example, a minivan) in which a push rod is short.SOLUTION: In a vehicle brake pedal device 100, when a vehicle collides frontward, a pedal bracket 20 is moved backward, and a movable plate 80 is brought into contact with a fixing member 51 and is rotated. Thus, a pressing part 83 of the movable plate is brought into contact with a clevis 70, a breakable portion 72 of the clevis is broken, and connection between the clevis 70 and a connecting arm 40 is released. After that, the connecting arm 40 is rotated frontward relative to the pedal bracket 20, and a backward retreat of the brake pedal pad 31 is suppressed.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a vehicular brake pedal device, and more particularly to a vehicular brake pedal device that suppresses retraction of a brake pedal when a partition wall (dash panel) moves into a vehicle interior due to a frontal collision of the vehicle.

  This type of vehicle brake pedal device is described, for example, in Patent Document 1 below. In the brake pedal device for a vehicle described in Patent Document 1 below, a brake pedal device including a brake arm having a brake pedal pad is disposed on the vehicle compartment side (rear side) of a dash panel that is a partition wall, A braking fluid pressure generating device including a master cylinder or the like is disposed in front of the dash panel. The link mechanism linked to the brake arm and the brake fluid pressure generator are connected by a push rod.

  In the vehicle brake pedal device described in Patent Document 1 below, a brake arm is swingably supported by a pedal bracket fixed to a dash panel. A fixed bracket is provided behind the pedal bracket. The fixed bracket is fixed to the pedal bracket and a vehicle body component (instrumental reinforcement) disposed behind the pedal bracket. A connecting arm is rotatably supported by the fixed bracket. The connecting arm is connected to the brake arm via an arm link. The connecting arm is connected to the push rod. Further, a rotating arm is rotatably supported by the connecting arm.

By the way, when a vehicle equipped with a vehicle brake pedal device described in Patent Document 1 collides with another vehicle located in front, the dash panel is deformed rearward (moved into the vehicle interior).
Then, since the relative distance between the dash panel and the fixed bracket is shortened, the fixed bracket comes into contact with the connecting arm from the rear. Therefore, the connecting arm rotates forward, and the brake arm linked to the connecting arm via the arm link rotates forward (in the pedal depression direction) with respect to the pedal bracket.
Further, at this time, since the fixing bracket also contacts the rotating arm, the rotating arm rotates. Then, the rotating arm collides with the intermediate portion of the push rod and bends the push rod. Therefore, compared with the case where a push rod is not bent, a connection arm becomes easy to rotate in the direction which rotates a brake arm ahead.
As described above, when the dash panel is deformed rearward, the brake arm rotates forward (pedal stepping direction) with respect to the pedal bracket, so that the brake pedal pad is deformed even though the dash panel is deformed rearward. The amount of rearward movement can be reduced.

JP 2014-40201 A

In the vehicle brake pedal device described in Patent Document 1 described above, the push rod is bent by the rotating arm in order to reliably rotate the brake arm forward when the dash panel is deformed rearward.
However, in a small vehicle (for example, a minivan), since the longitudinal length of the push rod is shortened, it is difficult to bend the push rod with the rotating arm. In other words, this type of vehicle cannot be equipped with the brake pedal device.

  The present invention has been made to cope with the above-described problems, and one of its purposes is to reduce the amount of rearward movement of the brake pedal pad when the partition wall supporting the pedal bracket is deformed rearward. And it is providing the brake pedal apparatus for vehicles which can be mounted also in a vehicle (for example, minivan) with a short push rod.

A brake pedal device for a vehicle according to the present invention includes:
A pedal bracket (20) disposed between a partition wall separating the inside and outside of the passenger compartment and a vehicle body component member (50) behind the partition wall, and fixed to the partition wall;
A brake arm (30) swingably supported by the pedal bracket and having a brake pedal pad (31);
A portion that is swingably supported by the pedal bracket and is located below the rotation center (41) of the pedal bracket is connected to the upper end of the brake arm via an arm link (42) and linked to a braking device. A connecting arm (40) in which a portion located above the rotation center is connected to the pushed rod (90) via a clevis (70, 110);
A movable plate (80) supported by the connecting arm in a state in which the rotation is restricted, and capable of turning with respect to the connecting arm when the turning restriction is released;
A fixed member that is fixed to the vehicle body constituting member and rotates the movable plate relative to the connecting arm by abutting the movable plate to release the rotation restriction when the pedal bracket is displaced rearward. (51),
A connecting bracket (60) disposed behind the connecting arm and connecting the vehicle body component and the pedal bracket;
The vehicle brake pedal device is configured such that when the brake pedal pad is stepped forward, the brake device is operated when the push rod is pushed forward.
When the pedal bracket is displaced rearward, the movable plate rotated with respect to the connecting arm comes into contact with the clevis so that the clevis can be connected to the connecting arm by a breakable portion (72, 110b4, 110c4) is broken, and when the connecting bracket pushes the connecting arm displaced rearward together with the pedal bracket, the brake pedal pad is moved forward while rotating the brake arm. There are features.

  In the vehicle brake pedal device according to the present invention, when the brake pedal pad is stepped forward, the brake arm and the connecting arm rotate with respect to the pedal bracket, respectively, and the push rod is pushed forward, As a result, the braking device generates a braking force.

  By the way, in the vehicle brake pedal device according to the present invention, the partition wall moves toward the vehicle interior due to the frontal collision of the vehicle, so that the pedal bracket moves backward, and the brake arm, the connecting arm, the movable plate, etc. also move backward. Moving. Thereby, in the initial operation after the collision, the movable plate comes into contact with the fixed member, and the movable plate releases the rotation restriction with the connecting arm and rotates. Therefore, the movable plate interferes (contacts) with the clevis, and the breakable portion of the clevis breaks. For this reason, the connection between the clevis and the connecting arm is released.

  In a later stage of operation after the collision, the connecting arm comes into contact with the connecting bracket, and the connecting arm is pushed forward with respect to the pedal bracket. Accordingly, the connecting arm rotates with respect to the pedal bracket, and accordingly, the brake arm rotates with respect to the pedal bracket, and the brake pedal pad moves forward. Therefore, the backward movement of the brake pedal pad can be suppressed.

  As described above, in the present invention, since the clevis is broken at the breakable portion by the rotation of the movable plate with respect to the connecting arm, the connection between the clevis and the connecting arm is released. The length of the rod (the length in the vehicle front-rear direction) can be set as appropriate. Therefore, the brake pedal device is also applied to a vehicle (for example, a minivan) in which the length in the vehicle front-rear direction between the partition wall, the vehicle body constituent member, and the connection bracket is short and the length of the push rod employed in the device is short. It can be installed.

  In carrying out the above-described present invention, the rotational axis center (81) of the movable plate can be set behind and above the portion where the movable plate and the clevis abut. In this case, it is possible to generate a component force in the drop-off direction (downward) on the push rod and clevis at the site where the movable plate and the clevis contact, and the push rod and clevis drop off (moving downward). It is possible to make sure.

  In carrying out the above-described present invention, the connecting arm may be provided with a guide portion (40a) for guiding the clevis released from the connection arm backward and downward. . In this case, since the clevis is guided backward and downward by the guide portion of the connection arm after the connection with the connection arm is released, the possibility that the push rod is caught by the connection arm can be reduced.

  In the above-described embodiment of the present invention, the movable plate is formed with a pushing portion (83) that comes into contact with the clevis when the movable plate rotates with respect to the connecting arm, and the clevis (70) A base portion (70A) for fastening the push rod, and a pair of arm portions (70B, 70C) extending rearward from the base portion and positioned on the left and right sides of the connecting arm, A mounting hole (70a1) through which the end of the push rod is inserted is provided, and an insertion circle through which a connecting pin (71) for connecting the connecting arm and the clevis is inserted into one arm portion (70A). A hole (70b1) and a notch (70b2) for defining the breakable portion are provided, and an insertion long hole (70c1) through which the connecting pin is inserted into the other arm portion (70B). The insertion slot has a straight portion (70c1a) capable of transmitting the rotational force of the connection arm to the clevis and the passage of the connection pin when the pushing portion abuts the clevis. An allowable opening (70c1b) may be provided. In this case, the clevis can be accurately broken at a predetermined position, and the breaking load can be reduced.

Further, in the implementation of the present invention described above, the movable plate is formed with a pushing portion (83) that comes into contact with the clevis when the movable plate rotates with respect to the connecting arm,
The clevis (110) includes an insertion round hole (110b1, 110c1) through which the connection pin (71) connecting the connection arm and the clevis is inserted, and from the insertion round hole toward the outer peripheral edge side of the clevis. A guide groove (110b2, 110c2) that extends and has a width smaller than the diameter of the insertion round hole, and is formed between the end of the guide groove opposite to the insertion round hole and the outer peripheral edge. It is also possible to provide the breakable portion (110b4, 110c4) that breaks after the pushing portion comes into contact with the clevis. In this case, the breaking load of the clevis can be further reduced. Further, since the peripheral portion of the guide groove is not deformed when the clevis is broken, a gap larger than the diameter of the connecting pin is easily formed in the broken portion. Therefore, there is a low possibility that the connecting pin will be caught by the broken portion, and therefore, the clevis can be reliably dropped from the connecting pin.

In the above description, in order to help the understanding of the invention, the reference numerals used in the embodiments are attached to the configuration of the invention corresponding to the embodiments in parentheses, but each constituent element of the invention is represented by the reference numerals. It is not limited to the embodiments specified.
Other objects, other features and attendant advantages of the present invention will be readily understood from the description of the embodiments of the present invention described with reference to the following drawings.

It is a side view in the normal time (before a collision) of the brake pedal device for vehicles concerning a 1st embodiment of the present invention. It is a principal part enlarged view of FIG. It is an enlarged side view of the clevis simple substance shown in FIG.1 and FIG.2. FIG. 4 is a perspective view of a single clevis shown in FIG. 3. It is a side view which shows the state (state in which the movable plate contact | abutted the fixed member) immediately after the collision of the vehicle brake pedal apparatus shown in FIG. FIG. 6 is a side view showing an initial operation state after the collision of the vehicle brake pedal device shown in FIG. 5 (a state where the movable plate has broken the clevis). FIG. 6 is a side view showing a state in a later stage of operation after the collision of the vehicle brake pedal device shown in FIG. 5 (a state where the connecting arm is in contact with the connecting bracket and tilted forward). It is a side view of the clevis simple substance concerning a 2nd embodiment of the present invention. It is a perspective view of the clevis simple substance concerning a 2nd embodiment of the present invention. It is a side view equivalent to FIG. 1 of 2nd Embodiment. It is a side view equivalent to FIG. 5 of 2nd Embodiment. It is a side view equivalent to FIG. 6 of 2nd Embodiment. It is a side view equivalent to FIG. 7 of 2nd Embodiment. It is a side view of the example which mounted | wore with the pedal effort switch to the brake pedal apparatus for vehicles shown in FIG.

  A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a vehicle brake pedal device according to the present invention. The vehicle brake pedal device 100 of this embodiment is disposed behind a metal dash panel 10 that is a partition wall that partitions the engine room R1 and the vehicle interior space R2. The upper end of the dash panel 10 is fixed by spot welding or the like to a metal cowl inner panel (not shown) that is arranged so that its longitudinal direction coincides with the vehicle width direction and forms a part of the cowl. Has been. Further, the dash panel 10 is fixed to a metal floor panel (not shown) by spot welding or the like at the lower end thereof.

  As shown in FIG. 1, the vehicle brake pedal device 100 includes a metal pedal bracket 20 fixed to the rear surface of the dash panel 10 and a metal brake arm 30 that is rotatably supported by the pedal bracket 20. And a metal connecting arm 40 that is rotatably supported by the pedal bracket 20. The pedal bracket 20 is disposed between the dash panel 10 and a well-known metal instrument panel reinforcement (vehicle body constituent member) 50 disposed behind the dash panel 10. A front end portion of the pedal bracket 20 is fixed to the dash panel 10, and a rear end portion of the pedal bracket 20 is fixed to the instrument panel reinforcement 50 through a metal connection bracket 60. A fixing member 51 is fixed to the lower front surface of the instrument panel reinforcement 50. The connection bracket 60 is disposed behind the connection arm 40 and is fixed to the instrument panel 50 at its upper end and is fixed to the rear end of the pedal bracket 20 at its lower end. Further, immediately after the connection bracket 60, a group of parts (not shown) constituting a part of the steering device that operates in accordance with the rotation of the steering handle (not shown) is arranged.

  The brake arm 30 has a brake pedal pad 31 at its lower end. The upper portion of the brake arm 30 is supported on the lower front portion of the pedal bracket 20 via a support shaft 32 so as to be swingable in the front-rear direction (rotatable about the support shaft 32). The brake pedal pad 31 is configured so as to be able to receive the driver's front diagonally downward pressing force. Therefore, when the driver's pedal force is applied to the brake pedal pad 31, the brake arm 30 rotates about the support shaft 32 in the clockwise direction of FIG.

The connecting arm 40 is supported at the lower portion thereof at the lower rear portion of the pedal bracket 20 via a support shaft 41 so as to be swingable in the front-rear direction (rotatable around the support shaft 41). The connecting arm 40 is connected to the upper end portion of the brake arm 30 via the arm link 42 at the lower end portion thereof. Further, a guide portion (inclined portion) 40 a that is inclined with respect to the vertical direction is provided on the front surface of the connecting arm 40. Further, a notch 43 is formed on the front surface of the upper end portion of the connecting arm 40.
Further, a clevis 70 and a movable plate 80 are assembled to the upper portion of the connecting arm 40.

  The metal clevis 70 has a base portion 70A and a pair of left and right arm portions 70B and 70C extending rearward from the base portion 70A, as shown in an enlarged manner in FIGS. The base portion 70A has a rectangular shape, and a mounting hole (round hole) 70a1 is provided at the center thereof. One arm portion 70B has a flange portion (high rigidity portion) 73 having an arc shape in a side view extending along the upper edge portion and the rear edge portion. The flange portion 73 has higher rigidity with respect to external forces (for example, bending force and torsional force) with respect to the clevis 70 as compared with other portions of the clevis 70. Furthermore, one arm part 70B is provided with an insertion round hole 70b1 and notches 70b2 and 70b3. The part located between the insertion round hole 70b1 and the notch 70b2 of the arm part 70B constitutes the breakable part 72. In other words, the insertion round hole 70b1 and the notch 70b2 define the position and size of the breakable portion 72. Further, the other arm portion 70C is provided with an insertion long hole 70c1 whose upper end is opened. The lower portion of the insertion long hole 70c1 is configured by a straight portion 70c1a extending in the vertical direction, and the upper portion of the insertion long hole 70c1 is configured by an opening 70c1b. The clevis 70 has a slope that forms the front end of the opening 70c1b.

The vicinity of the rear end of the push rod 90 is inserted and fixed in the mounting hole 70a1 of the base portion 70A of the clevis 70. Further, a metal connecting pin 71 extending in the vehicle width direction is inserted into the insertion round hole 70b1 and the straight portion 70c1a of the clevis 70. The central portion of the connecting pin 71 passes through the connecting arm 40 and is fixed to the connecting arm 40. The outer diameter of the connecting pin 71 is substantially the same (slightly smaller) as the diameter of the insertion round hole 70b1 and the straight portion 70c1a, and is clearly smaller than the front-rear width of the opening 70c1b.
On the other hand, in front of the dash panel 10 (on the engine room R1 side), an unillustrated braking fluid pressure generator (including a brake booster, a master cylinder, etc.) that generates braking fluid pressure is disposed. The brake fluid pressure generating device is linked to a brake device provided on each wheel. The front end of the push rod 90 is linked to the brake fluid pressure generator.

  As shown in FIGS. 1 and 2, the metal movable plate 80 is swingable in the front-rear direction via the support shaft 81 at the upper end of the connecting arm 40 above the clevis 70 (centering on the support shaft 81). As freely rotatable). A metal holding pin 82 extending in the left-right direction is fixed to the movable plate 80. The holding pin 82 protrudes from the side surface of the movable plate 80 in the vehicle width direction. The holding pin 82 can be engaged and disengaged with respect to the notch 43 provided in the connecting arm 40. When the holding pin 82 is engaged with the notch 43, the holding pin 82 is in a predetermined position (the illustrated position in FIGS. 1 and 2). Retained. In other words, when the holding pin 82 is engaged with the notch 43, the rotation of the movable plate 80 with respect to the connecting arm 40 is restricted. Further, a pusher 83 is formed on the movable plate 80.

  In the vehicle brake pedal device 100 configured as described above, in a normal state (a state before a vehicle on which the vehicle brake pedal device 100 is mounted collides with another vehicle or the like), each component member is shown in FIGS. 2 is in the state shown. Therefore, when the brake pedal pad 31 is stepped forward and obliquely downward by the driver, the brake arm 30 and the connecting arm 40 rotate with respect to the pedal bracket 20 respectively. Then, since the connecting pin 71 pushes the insertion round hole 70b1 of the clevis 70 and the front end face of the straight portion 70c1a forward, the push rod 90 moves forward. Then, the brake fluid pressure generating device is activated, and a braking force is applied to each wheel from each brake device.

  By the way, when a vehicle equipped with the vehicle brake pedal device 100 collides with another vehicle or the like located in front of itself, the dash panel 10 moves while being deformed toward the vehicle interior space R2 (rear). Then, as shown in FIG. 5, the pedal bracket 20 moves backward, and the brake arm 30, the connecting arm 40, the movable plate 80, etc. also move backward. Further, the connecting bracket 60 connected to the pedal bracket 20 is deformed rearward. As a result, the vehicle brake pedal device 100 enters the state shown in FIG. 6 through the state shown in FIG. 5 in the initial operation after the collision. That is, the upper end of the movable plate 80 comes into contact with the fixed member 51, and the movable plate 80 rotates about the support shaft 81 in the counterclockwise direction of FIG. Then, the movable plate 80 rotates while the holding pin 82 is escaped from the notch 43 (that is, while the restriction of the rotation of the movable plate 80 by the holding pin 82 and the notch 43 is released). Therefore, the pushing portion 83 of the movable plate 80 collides with the front end portion of the flange portion 73 of the clevis 70 from the front, and the breakable portion 72 is broken by the impact force generated in the clevis 70 at this time. And the site | part located back rather than the fracture | rupture part of the arm part 70B rotates relatively back centering on the notch 70b3 with respect to the site | part located ahead of the fracture | rupture part (part torn into two branches). For this reason, the connection between the clevis 70 and the connecting arm 40 via the holding pin 82 and the notch 43 is released.

Further, in a later stage of operation after the collision, the vehicle brake pedal device 100 changes from the state of FIG. 6 to the state of FIG. That is, the connecting pin 71 fixed to the connecting arm 40 escapes above the clevis 70 through the breakage portion formed in the breakable portion 72 of the clevis 70, the straight portion 70c1a, and the opening portion 70c1b. Since the front-rear width of the opening 70c1b is (apparently) larger than the outer diameter of the connecting pin 71, the connecting pin 71 smoothly escapes upward from the opening 70c1b. Further, the clevis 70 detached from the connection pin 71 is guided rearward and obliquely downward along the guide portion 40 a of the connection arm 40. Therefore, after the clevis 70 is released from the connection arm 40 (connection pin 71), the clevis 70 and the push rod 90 are caught by the connection arm 40, and as a result, the clevis 70 and the push rod 90 move downward. There is little risk of being disturbed.
Accordingly, no force is transmitted between the connecting arm 40 and the push rod 90. Therefore, even if the push rod 90 moves backward due to a collision, the connecting arm 40, the arm link 42, and the brake arm 30 are not rotated by the backward moving force of the push rod 90.
Furthermore, the middle part in the vertical direction of the connecting bracket 60 deformed rearward as the pedal bracket 20 moves rearward collides with the parts group of the steering device located immediately after itself. Therefore, as shown in FIG. 7, the intermediate part of the connection bracket 60 in the vertical direction is bent forward. Then, the bent portion of the intermediate portion of the connection bracket 60 pushes the upper portion of the connection arm 40 forward with respect to the pedal bracket 20. As a result, the connecting arm 40 rotates with respect to the pedal bracket 20 (the connecting arm 40 rotates about the support shaft 41 with respect to the pedal bracket 20 in the counterclockwise direction of FIG. 7), and accordingly, the brake arm 30 rotates with respect to the pedal bracket 20 (the brake arm 30 rotates around the support shaft 32 in the clockwise direction of FIG. 7 with respect to the pedal bracket 20), and the brake pedal pad 31 moves forward. Therefore, it is possible to suppress the backward movement of the brake pedal pad 31 even though the dash panel 10 is moved (deformed) rearward.

  7 indicates the position of the brake pedal pad 31 when the vehicle brake pedal device 100 described above is in the state of FIG. The brake pedal pad 31 shown by the two-dot chain line in FIG. 7 shows the position of the brake pedal pad 31 when the vehicle brake pedal device 100 is in the state shown in FIG.

  As described above, in the vehicle brake pedal device 100, when the dash panel 10 is deformed rearward due to a vehicle collision or the like, the clevis 70 can be accurately broken at a predetermined position. The breakable load 72 can be reduced with the breakable portion 72 as one place on the arm portion 70B side. Therefore, the clevis 70 is broken at the breakable portion 72 by the rotation of the movable plate 80 with respect to the connecting arm 40, and the connection between the clevis 70 and the connecting arm 40 is released. In other words, the push rod 90 is not bent (it is not necessary to be bent). Therefore, the length of the push rod 90 (the length in the vehicle front-rear direction) can be set as appropriate. Accordingly, the vehicle longitudinal direction length L (see FIG. 1) between the dash panel 10, the instrument panel reinforcement 50, and the connecting bracket 60 and the vehicle having a short push rod 90 (for example, a minivan) are also applied to the brake. The pedal device 100 can be mounted.

  Further, in the vehicle brake pedal device 100 described above, the center of the rotating shaft (support shaft 81) of the movable plate 80 is the collision portion between the pushing portion 83 of the movable plate 80 and the flange portion 73 of the clevis 70 (shown in FIG. 5). It is set behind and above the contact portion of the movable plate 80 and the clevis 70). Accordingly, an impact force in a direction perpendicular to the straight line connecting the support shaft 81 and the collision site is generated in the clevis 70. Therefore, the impact force (component force) generated in the clevis 70 when the pushing portion 83 collides with the flange portion 73 causes the breakable portion 72 to break and the clevis 70 to drop off from the connecting pin 71 (downward). ). Therefore, the push rod 90 and the clevis 70 can be reliably detached (moved downward) from the connection pin 71 (connection arm 40).

  Next, a second embodiment of the present invention will be described with reference to FIGS. The same members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof is omitted. The “same members” include not only those having the completely same shape and function, but also those having substantially the same function but having slightly different shapes.

The vehicle brake pedal device 200 according to the present embodiment is characterized by a clevis 110.
The metal clevis 110 has a base portion 110A and a pair of left and right arm portions 110B and 110C extending rearward from the base portion 110A, as shown in an enlarged manner in FIGS. The base 110A is rectangular, and a mounting hole (round hole) 110a1 is provided at the center. The left and right arm portions 110B and 110C have the same shape. The left and right arm portions 110B and 110C extend through the insertion round holes 110b1 and 110c1 and the front ends of the insertion round holes 110b1 and 110c1 and then extend upward (that is, the outer peripheral edge side of the arm portions 110B and 110C). Guide grooves 110b2 and 110c2 made of through grooves are formed. Further, on the outer peripheral edges of the left and right arm portions 110B and 110C, first notches 110b3 and 110c3 are formed which extend toward the front end side of the guide grooves 110b2 and 110c2 and have tapered tips (rear ends). ing. Breakable portions 110b4 and 1110c4 are formed between the front ends of the guide portions 110b2 and 110c2 and the rear ends of the first notches 110b3 and 110c3, respectively. Further, second notches 110b5 and 110c5 are formed on the outer peripheral edges of the left and right arm portions 110B and 110C.

  The clevis 110 is connected to the connecting arm 40 and the push rod 90 in the same manner as in the first embodiment. That is, the vicinity of the rear end of the push rod 90 is inserted and fixed in the mounting hole 110a1 of the base 110A of the clevis 110. Further, left and right end portions of the connecting pin 71 are inserted into the left and right insertion round holes 110b1 and 110c1 of the clevis 110, respectively. The outer diameter of the connecting pin 71 is slightly smaller (that is, substantially the same) than the diameter of the insertion round holes 110b1 and 110c1, and is obviously larger than the width of the guide portions 110b2 and 110c2.

  In the vehicle brake pedal device 200, each component is in the state shown in FIG. 10 at normal times (a state before a vehicle equipped with the vehicle brake pedal device 200 collides with another vehicle or the like). Therefore, when the brake pedal pad 31 is stepped forward and obliquely downward by the driver, when the brake arm 30 and the connecting arm 40 are rotated with respect to the pedal bracket 20, the connecting pin 71 is inserted into the left and right insertion circles of the clevis 110. A forward substantially horizontal pressing force F (see FIG. 8) is applied to the front ends of the holes 110b1 and 110c1. As a result, the push rod 90 moves forward to actuate the brake fluid pressure generating device, so that braking force is applied to each wheel from each brake device.

  On the other hand, when a vehicle equipped with the vehicle brake pedal device 200 collides with another vehicle or the like located in front of itself, the dash panel 10 moves while deforming toward the vehicle interior space R2 (rear). Then, as in the first embodiment, as shown in FIG. 10, the pedal bracket 20 moves backward, and the brake arm 30, the connecting arm 40, the movable plate 80, etc. also move backward. Further, the connecting bracket 60 connected to the pedal bracket 20 is deformed rearward. As a result, the vehicle brake pedal device 200 enters the state shown in FIG. 11 through the state shown in FIG. 10 at the initial stage of operation after the collision. That is, the upper end of the movable plate 80 abuts on the fixed member 51, and the movable plate 80 is formed on the rear edge of the movable plate 80 with respect to the connecting arm 40 by the reaction force received from the fixed member 51. It rotates while making it escape from the notch 43 back.

As a result, the pushing portion 83 of the movable plate 80 collides with the upper ends of the arm portions 110B and 110C of the clevis 110 from the front. Also in the present embodiment, the center of the rotating shaft (support shaft 81) of the movable plate 80 is set behind and above the collision portion between the pushing portion 83 of the movable plate 80 and the clevis 110. An impact force in a direction perpendicular to the straight line connecting the support shaft 81 and the collision site is generated in the clevis 110. Therefore, the breakable portions 110b4 and 110c4 are broken by the impact force (partial force) generated in the clevis 110 at this time.
Breakable portions 110b4 and 110c4 are formed between the front ends of the guide grooves 110b2 and 110c2 and the rear ends of the first notches 110b3 and 110c3, respectively. The positions and shapes of the guide grooves 110b2 and 110c2 and the first notches 110b3 and 110c3 are set so that the widths of the breakable portions 110b4 and 110c4 are narrower than the breakable portion 72 of the clevis 70. . Therefore, the breaking load of the breakable portions 110b4 and 110c4 of the clevis 110 is smaller than that of the breakable portion 72 of the clevis 70. Therefore, when the pushing portion 83 of the movable plate 80 collides with the clevis 110, the breakable portions 110b4 and 110c4 of the clevis 110 are reliably broken.

By the way, as described above, when the driver depresses the brake pedal pad 31 of the vehicle brake pedal device 200 obliquely forward and downward, the connecting pin 71 is opposed to the front ends of the left and right insertion round holes 110b1 and 110c1 of the clevis 110. Then, a substantially horizontal pressing force F is applied (see FIG. 8).
However, as is apparent from FIG. 8, the pressing force F is a force passing through a portion away from the breakable portions 110b4 and 110c4.
Therefore, the breakable portions 110b4 and 110c4 of the clevis 110 are not broken by the pressing force F exerted by the connecting pin 71 on the clevis 110 when the driver steps on the brake pedal pad 31 diagonally downward.

Further, in a later stage of operation after the collision, the vehicle brake pedal device 200 changes from the state of FIG. 12 to the state of FIG.
Since the breakable portions 110b4 and 110c4 are small (compared to the breakable portion 72), the amount of deformation (elongation) of the breakable portions 110b4 and 110c4 when the breakable portions 110b4 and 110c4 break is small. Further, the portions adjacent to the front edge portions of the guide grooves 110b2 and 110c2 of the arm portions 110B and 110C and the portions adjacent to the rear edge portions of the guide grooves 110b2 and 110c2 hardly deform (do not extend). For this reason, the energy of the impact force generated in the clevis 110 is an appropriate ratio, and is located behind the fractured portion of the arm portions 110B and 110C and includes a portion including the rear edges of the guide grooves 110b2 and 110c2. It is used for relative rotation rearward with respect to a portion including the front edge portions of the guide grooves 110b2 and 110c2 that are located in front of the fracture portion and centered on 110c5. Therefore, the front and rear dimensions of the gap formed between the front edge portion and the rear edge portion of the guide grooves 110b2 and 110c2 are increased.
Therefore, the connecting pin 71 smoothly escapes above the clevis 110 from the gap between the front edge portion and the rear edge portion of the guide grooves 110b2 and 110c2. In other words, the connection pin 71 is caught on the front edge portion and / or the rear edge portion of the guide grooves 110b2 and 110c2, and as a result, the possibility that the connection pin 71 cannot escape above the clevis 110 is small.

  If the guide grooves 110b2 and 110c2 are not formed in the arm portions 110B and 110C, the breakable portion becomes large. Therefore, the breakable portion is greatly deformed (elongated) by the impact force generated in the clevis 110, and then the breakable portion is broken. That is, the energy of the impact force generated in the clevis 110 is used for the deformation of the breakable portion at a large rate. Therefore, the ratio of the part utilized in order to rotate back the part located behind the fracture | rupture part of arm part 110B, 110C with respect to the part located ahead rather than a fracture | rupture part among the energy of impact force becomes small. . Therefore, there is a possibility that the portion located rearward from the fracture portion of the arm portions 110B and 110C may not be moved sufficiently backward relative to the portion located forward from the fracture portion. Therefore, in this case, the connecting pin 71 may be caught by the front edge part or the rear edge part of the broken part of the arm parts 110B and 110C.

Further, the clevis 110 detached from the connecting pin 71 is guided rearward and obliquely downward along the guide portion 40 a of the connecting arm 40.
Therefore, after the clevis 110 is disconnected from the connection arm 40 (connection pin 71), the clevis 110 and the push rod 90 are caught by the connection arm 40. As a result, the clevis 110 and the push rod 90 move downward. There is little risk of being disturbed.

Further, as shown in FIG. 13, the intermediate portion in the vertical direction of the connection bracket 60 deformed rearward with the rearward movement of the pedal bracket 20 collides with the parts group of the steering device located immediately after itself. Therefore, the middle part of the connecting bracket 60 in the vertical direction is bent forward, and this bent part pushes the upper part of the connecting arm 40 forward against the pedal bracket 20.
Accordingly, the connecting arm 40 rotates with respect to the pedal bracket 20 and the brake arm 30 rotates with respect to the pedal bracket 20 around the support shaft 32 in the clockwise direction of FIG. 13, so that the brake pedal pad 31 moves forward. To do. Therefore, although the dash panel 10 is moved (deformed) rearward, the backward movement of the brake pedal pad 31 can be suppressed.

  13 indicates the position of the brake pedal pad 31 when the vehicle brake pedal device 200 described above is in the state of FIG. The brake pedal pad 31 shown by the two-dot chain line in FIG. 13 shows the position of the brake pedal pad 31 when the above-described vehicle brake pedal device 200 is in the state shown in FIG.

  As described above, also in the vehicle brake pedal device 200, the push rod 90 is not bent (there is no need to bend) when the dash panel 10 is deformed rearward due to a vehicle collision or the like. For this reason, the brake L is also applied to a vehicle (for example, a minivan) in which the vehicle front-rear direction length L (see FIG. 10) between the dash panel 10, the instrument panel reinforcement 50, and the connection bracket 60 and the push rod 90 are short. A pedal device 200 can be mounted.

In addition, this invention is not limited to said each embodiment, A various modification is employable within the scope of the present invention.
The vehicle brake pedal device 100 described above is an embodiment in which the pedal effort switch (brake switch) S is not mounted. However, when the present invention is implemented, it is possible to mount the pedal force switch S as illustrated in FIG. The pedal force switch S illustrated in FIG. 14 is provided between the rear upper part of the pedal bracket 20 and the lower part of the connecting arm 40, the switch main body Sa assembled to the pedal bracket 20, and the switch main body Sa and the connecting arm. And a return spring Sb interposed between 40. The pedal force switch S is set to be turned on when the brake arm 30 is tilted by a predetermined amount from the return position shown in FIG. 14 and turned off when the brake arm 30 is returned to the return position shown in FIG.
Of course, it is also possible to apply the pedal effort switch S to the vehicle brake pedal device 200 of the second embodiment.

  DESCRIPTION OF SYMBOLS 10 ... Dash panel (partition wall), 20 ... Pedal bracket, 30 ... Brake arm, 31 ... Brake pedal pad, 32 ... Support shaft, 40 ... Connection arm, 40 ... Connection arm, 40a ... Guide part, 41 ... Support shaft, 42 ... arm link, 43 ... notch, 50 ... instrument panel reinforcement (vehicle body component), 51 ... fixing member, 60 ... coupling bracket, 70 ... clevis, 70A ... base, 70B ... arm, 70C ... arm, 70b1 ... Insertion round hole, 70b2, 70b3 ... Notch, 70c1 ... Insertion long hole, 70c1a ... Straight part, 70c1b ... Opening part, 71 ... Connecting pin, 72 ... Breakable part, 73 ... Flange part, 80 ... Movable plate, 81 ... Support Shaft, 82 ... holding pin, 83 ... pusher, 90 ... push rod, 100 ... vehicle brake pedal device, 110 · Clevis, 110A ... Base, 110B, 110C ... Arm, 110a1 ... Mounting hole, 110b1, 110c1 ... Insertion round hole, 110b2, 110c2 ... Guide groove, 110b3, 110c3 ... 110b4, 110c4 ... breakable part, 110b5, 110c5 ... second notch, 200 ... vehicle brake pedal device, R1 ... engine room, R2 ... vehicle interior space, S ... pedal force switch .

Claims (5)

A pedal bracket disposed between the partition wall separating the inside and outside of the passenger compartment and the vehicle body component behind the partition wall, and fixed to the partition wall;
A brake arm swingably supported by the pedal bracket and having a brake pedal pad;
A portion that is swingably supported by the pedal bracket and is located below the rotation center of the pedal bracket is connected to an upper end portion of the brake arm via an arm link, and is connected to a push rod linked to a braking device. A connecting arm in which a portion located above the center of rotation is connected via a clevis;
A movable plate that is supported by the connection arm in a state in which the rotation is restricted, and that is rotatable relative to the connection arm when the rotation restriction is released;
A fixed member that is fixed to the vehicle body constituting member and rotates the movable plate relative to the connecting arm by abutting the movable plate to release the rotation restriction when the pedal bracket is displaced rearward. When,
It is disposed behind the connecting arm, and includes a connecting bracket that connects the vehicle body component and the pedal bracket,
The vehicle brake pedal device is configured such that when the brake pedal pad is stepped forward, the brake device is operated when the push rod is pushed forward.
When the pedal bracket is displaced rearward, the movable plate rotated with respect to the connecting arm is brought into contact with the clevis to break the breakable portion that is a connecting portion of the clevis to the connecting arm; and The brake pedal for a vehicle is configured to move the brake pedal pad forward while rotating the brake arm when the connection bracket pushes the connection arm displaced rearward together with the pedal bracket. apparatus.   The vehicular brake pedal device according to claim 1, wherein a center of rotation of the movable plate is set behind and above a portion where the movable plate and the clevis are in contact with each other.   The vehicle brake pedal according to claim 1, wherein the connecting arm is provided with a guide portion that guides the clevis released from connection with the connecting arm backward and downward. apparatus. The movable plate is formed with a pushing portion that comes into contact with the clevis when the movable plate rotates with respect to the connection arm.
The clevis is
It has a base for fastening the push rod and a pair of arm portions that extend rearward from the base and are located on the left and right sides of the connecting arm, and the end of the push rod is inserted into the base. A mounting hole is provided, one arm portion is provided with a through hole for inserting a connecting pin for connecting the connecting arm and the clevis, and a notch for defining the breakable portion, The arm portion is provided with an insertion long hole through which the connecting pin is inserted, and the insertion long hole has a straight portion capable of transmitting the rotational force of the connecting arm to the clevis and the pushing portion on the clevis. The vehicular brake pedal device according to any one of claims 1 to 3, further comprising an opening that allows the connecting pin to pass through when abutting. The movable plate is formed with a pushing portion that comes into contact with the clevis when the movable plate rotates with respect to the connection arm.
The clevis is
An insertion round hole through which a connection pin connecting the connection arm and the clevis is inserted;
A guide groove comprising a through groove extending from the insertion round hole toward the outer peripheral edge of the clevis and having a width smaller than the diameter of the insertion round hole;
The breakable part formed between the end of the guide groove opposite to the insertion round hole and the outer peripheral edge, and the breakable part breaking after the pushing part comes into contact with the clevis;
The brake pedal device for vehicles according to any one of claims 1 to 3 provided with.

Images