JPH1120493A - Pedal bracket structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide pedal bracket structure for an automobile that can avoid interference with a steering member due to backward movement of a pedal bracket at the time of a head-on collision of the automobile. SOLUTION: A pedal bracket 4 is formed being divided in a front bracket 4A and a rear bracket 4B, and the front bracket 4A is connected in a backward slidable state to the rear bracket 4B. Accordingly, even in case of the front bracket 4A moving backward in association with the deformation of a dashboard lower panel 13 onto the cabin side due to a head-on collision of a vehicle, the front bracket 4A only slides backward in relation to the rear bracket 4B, and backward movement of the rear bracket 4B is suppressed so as to be able to avoid interference with a steering member 16 disposed in an upper position near the rear end part of the rear bracket 4B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a pedal bracket for mounting a pedal such as a brake pedal or an accelerator pedal of an automobile on a vehicle body.

[0002]

2. Description of the Related Art As a mounting structure of a pedal such as a brake pedal of an automobile, for example, as shown in Japanese Utility Model Application Laid-Open No. 6-1113, a pedal bracket is provided which pivotally supports the upper end of a pedal arm. The front wall is fastened and fixed to the dash lower panel with bolts and nuts, and the upper wall of the pedal bracket is fastened and fixed to the lower surface of the dash upper panel which is joined to the dash lower panel and protrudes toward the passenger compartment side with bolts and nuts. There is a known pedal bracket that is fixedly attached to a dash lower panel and a dash upper panel.

[0003]

As described above, the pedal bracket is fastened and fixed to the dash lower panel and the lower surface of the dash upper panel projecting toward the passenger compartment as described above. When the pedal bracket is deformed to the room side and moves backward together with the dash lower panel, a rotational moment is generated in the pedal bracket ascending rearward with the fastening point with the lower surface of the dash upper panel as a fulcrum, and the pedal bracket is obliquely rearward. It tends to retreat upward.

On the other hand, inside an instrumental panel,
That is, since the steering member that supports the steering column is disposed in front of the vehicle cabin in the vicinity of the rear of the pedal bracket and obliquely upward, the pedal bracket has moved backward as described above during a frontal collision of the vehicle. Sometimes, the rear end of the pedal bracket interferes with the steering member, and a collision input may act on the steering member.

Therefore, the present invention can prevent the pedal bracket from interfering with the steering member even when the pedal bracket moves backward due to the deformation of the dash lower panel toward the cabin at the time of a frontal collision of the vehicle. An object of the present invention is to provide an automobile pedal bracket structure.

[0006]

According to a first aspect of the present invention, in a structure in which a pedal bracket rotatably supporting an upper end of a pedal arm is mounted across a dash lower panel and a dash upper panel, The bracket is divided into a front bracket fixed to the dash lower panel and a rear bracket that pivotally supports the upper end of the pedal arm and is attached to the lower side of the dash upper panel. And is connected so as to be slidable rearward.

According to a second aspect of the present invention, a bolt hole for inserting a bolt for connecting the front bracket and the rear bracket is formed in the front and rear portions of the front bracket and the front portion of the rear bracket. In addition, the front bracket and the rear bracket are connected to each other by inserting the bolt into the rear end of the bolt hole of the front bracket and the front end of the bolt hole of the rear bracket.

According to a third aspect, the upper wall of the rear bracket according to the first and second aspects abuts against the lower surface of the dash upper panel, and when an impact acting on the rear bracket in a retreating direction exceeds a predetermined load. , And is fixed so as to be detached from the dash upper panel.

According to a fourth aspect of the present invention, the upper wall of the rear bracket according to the third aspect is attached to the lower surface of the dash upper panel in a forwardly inclined state, and a fixing bolt is inserted through the upper wall. Formed at the front side of the bolt insertion hole with a larger opening width than the head side of the bolt, and comes out from the head side of the bolt when the rear bracket is moved backward. A detachment slit having a window is formed.

In a fifth aspect of the present invention, the upper wall of the rear bracket according to the fourth aspect, in which the bolt insertion hole is formed, is formed so as to bulge slightly higher than the general surface of the upper wall and to move forward. It is characterized in that an inclined slope-shaped mounting surface is formed.

According to a sixth aspect, the rear end of the upper wall of the rear bracket according to any one of the third to fifth aspects is substantially lower half of a substantially circular cross-section steering member disposed in the vehicle width direction behind the rear bracket. It is characterized in that the height is set at a height of not more than a part.

According to a seventh aspect of the present invention, the lower portion of the steering member according to the third to sixth aspects is provided at a position corresponding to a rear end of the rear bracket, and the rear end of the rear bracket when the rear bracket is moved backward. It is characterized in that a concave portion through which a hole can pass is formed.

According to an eighth aspect of the present invention, a rearward turning force is applied to a pedal arm rotatably supported on a pedal shaft provided on the rear bracket according to any one of the first to seventh aspects, and the pedal is provided. A push rod lever rotatably supported by a shaft and connected to a push rod of a master back, and in a normal state, the pedal arm and the push rod lever are integrally connected, and these are detected by a collision detecting means. It is characterized in that it is provided with clutch means for separating the pedal arm and the push rod lever.

According to a ninth aspect, either one of the push rod lever and the pedal arm according to the eighth aspect is slidably supported in the axial direction of the pedal shaft, and the clutch means is pushed with the pedal arm. A meshing portion formed on an end face of a boss portion formed on each shaft portion of the rod lever and engaging with each other is positioned so that the meshing portion of the push rod lever and the pedal arm normally engages, and a predetermined load is applied. And a positioning means capable of allowing one of the push rod lever and the pedal arm to move in the direction in which the engagement portion is disengaged along the axial direction of the pedal shaft. Features.

According to a tenth aspect of the present invention, the positioning means according to the ninth aspect is axially slidably supported on an arm shaft provided on the rear bracket in parallel with the pedal shaft, and is provided with a push rod lever or a pedal. A clutch arm connected to one of the arms and a positioning member that positions the clutch arm at a predetermined position in the axial direction of the arm shaft and that is displaced when a predetermined load is exceeded.

According to an eleventh aspect of the present invention, the collision detecting means according to the tenth aspect is rotatably supported by an arm shaft, and is provided at a rear portion of the front bracket by retreating the front bracket by a collision load. A collision detection lever that rotates by engaging with the engaging portion, and a clutch arm and a boss formed on each shaft support of the collision detection lever are engaged with each other and are engaged with each other. A cam portion for moving the clutch arm along the axial direction of the arm shaft in a direction in which the engagement of the engagement portion is released against the positioning force of the positioning member.

In the twelfth aspect, the tenth and eleventh aspects are described.
Wherein the positioning member is constituted by a spring that urges the clutch arm in the axial direction of the arm shaft.

According to a thirteenth aspect, one of the push rod lever and the pedal arm according to the eighth to twelfth aspects is engaged with the other, and in the normal state, is engaged with the other front and rear side edge to connect the two. Further, when the push rod lever and the pedal arm are separated from each other by the clutch means, a claw portion which is disengaged is provided.

According to a fourteenth aspect, a return spring is stretched across the rear bracket and the push rod lever according to the eighth to thirteenth aspects, and the pedal arm is rotated backward by the pedal arm via the push rod lever. It is characterized by energizing power.

[0020]

According to the first aspect of the present invention, the pedal bracket is divided into a front bracket fixed to the dash lower panel, and a rear bracket mounted on the lower side of the dash upper panel for pivotally supporting the upper end of the pedal arm. And the front bracket is connected to the rear bracket so as to be slidable rearward, so that the front bracket retreats as the dash lower panel deforms toward the passenger compartment due to the frontal collision of the vehicle. However, the front bracket only slides rearward with respect to the rear bracket, so that the rear bracket is restrained from retreating, and the rear bracket interferes with a steering member disposed at an upper position near the rear end. Can be avoided.

According to the second aspect, in addition to the effect of the first aspect, bolt holes for inserting bolts for connecting the both are formed in the front and rear portions of the front bracket and the front portion of the rear bracket. The front bracket and the rear bracket are connected by connecting the front bracket to the rear bracket by inserting the bolt into the rear toe of the bolt hole of the front bracket and the front toe of the bolt hole of the rear bracket. Of the rear bracket with respect to the rear bracket can be sufficiently ensured.

According to the third aspect, in addition to the effects of the first and second aspects, in addition to the effects of the first and second aspects, the upper wall of the rear bracket abuts on the lower surface of the dash upper panel, and the impact acting on the rear bracket in the retreating direction applies a predetermined load. The front bracket slides rearward with respect to the rear bracket with the deformation of the dash lower panel toward the cabin due to the frontal collision of the vehicle because it is attached so as to separate from the dash upper panel when it exceeds Even if the amount of deformation of the dash lower panel exceeds the slide stroke of the front bracket and a collision load is input to the rear bracket, if the input exceeds a predetermined load, the rear bracket separates from the dash upper panel. Unrestricted movement, thus supporting the mounting point on the upper wall of the rear bracket There is no possibility that moment behind rise occurs to.

As a result, the rear end of the rear bracket does not move backward and obliquely upward, and interference with the steering member disposed above the rear end of the rear bracket can be avoided. It can be more thorough.

According to claim 4, in addition to the effect of claim 3, the upper wall of the rear bracket is attached to the lower surface of the dash upper panel in a forwardly inclined state, and the upper wall has a fixing bolt. Is formed at the front side of the bolt insertion hole with a larger opening width than the head side of the bolt, and the head side of the bolt when the rear bracket is moved backward. Since the detachment slit with the window part that comes out is formed, the deformation amount of the dash lower panel due to the frontal collision of the vehicle exceeds the slide stroke of the front bracket, and the collision load is input to the rear bracket and the rear bracket moves backward The head side of the bolt can be pulled out of this release slit without getting caught, and the upper wall of the rear bracket can be smoothly released. That.

According to the fifth aspect, in addition to the effect of the fourth aspect, in the portion where the bolt insertion hole is formed in the upper wall of the rear bracket, the mounting surface is formed slightly higher than the general surface of the upper wall. Therefore, the contact area of the upper wall with the lower surface of the dash upper panel is small, so that the frictional resistance when the rear bracket moves backward and separates can be reduced, and the mounting surface is inclined forward. Since the bulge is bulged in the shape of a slope, the detaching action of the rear bracket can be performed more smoothly.

According to the sixth aspect, in addition to the effects of the third to fifth aspects, the rear end of the upper wall of the rear bracket is arranged substantially rearward of the rear bracket in the vehicle width direction. Since the rear bracket is set at a height that is lower than the lower half, the rear bracket may move backward, so that even if the rear end may interfere with the steering member, It is possible to prevent the collision input from acting on the steering member by slipping to the side.

According to the seventh aspect, in addition to the effects of the third to sixth aspects, when the rear bracket is moved backward, the rear end can pass through the recess formed in the lower portion of the steering member. It is possible to reliably prevent the rear bracket from interfering with the steering member.

According to the eighth aspect, in addition to the effects of the first to seventh aspects, in a normal state, the pedal arm and the push rod lever are integrally connected by the clutch means. The pedal arm and the push rod lever rotate integrally, so that a master back operation similar to a general brake pedal device can be performed.

On the other hand, when the vehicle collides from the front, the clutch means is actuated by the collision detecting means to separate the pedal arm and the push rod lever, so that the master back is moved backward or the dash lower panel is moved toward the passenger compartment. Even if the push rod of the master back moves backward due to the deformation, the collision load can be avoided from being input to the pedal arm only by the swinging rotation of the push rod lever.

According to the ninth aspect, in addition to the effect of the eighth aspect, in addition to the effect of the eighth aspect, the clutch means is formed on the end surface of the boss portion of each of the shaft support portions of the pedal arm and the push rod lever, and the clutch means of the push rod lever or the pedal arm. Either one is positioned along the axial direction of the pedal shaft so that the meshing portion is engaged, and is displaced when exceeding a predetermined load to allow movement in a direction in which the meshing portion is disengaged. Since the mechanical clutch structure is constituted by these means, the structure is simple and the cost can be advantageously obtained.

According to the tenth aspect, in addition to the effect of the ninth aspect, the clutch arm of the positioning means slides in the axial direction along the arm shaft parallel to the pedal shaft. The axial sliding on either one of the pedal shafts can be smoothly performed, and the clutch operation can be smoothly performed.

According to the eleventh aspect, in addition to the effect of the tenth aspect, since the collision detecting means is mechanically constituted by the collision detecting lever and the cam portion, the structure is simple and the cost is advantageously obtained. be able to.

According to the twelfth aspect, in addition to the effects of the tenth and eleventh aspects, since the positioning member is constituted by a spring, the structure is simplified and the cost is advantageously obtained, and the spring absorbs vibration. As a result, rattling of the clutch arm can be eliminated, and the sense of quality can be improved.

According to the thirteenth aspect, in addition to the effects of the eighth to twelfth aspects, one of the push rod lever and the pedal arm is engaged with the other front and rear side edge in a normal state, and these two are engaged. Because the pawl portion is disengaged when the push rod lever and the pedal arm are disengaged by the clutch means, the coupling strength between the pedal arm and the push rod lever in a normal state is reduced. Can be enhanced.

According to the fourteenth aspect, in addition to the effects of the eighth to thirteenth aspects, since the return spring is stretched over the push rod lever and the rear bracket, the push rod lever and the rear rod can be moved in the event of a frontal collision of the vehicle. When the pedal arm is separated from the pedal arm, the urging force of the return spring acting on the pedal arm is released, so that a load acting on the driver's foot can be eliminated.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

1 and 2, reference numeral 1 denotes a brake pedal unit. The brake pedal unit 1 includes a pedal arm 2 having a pedal pad (not shown) at a lower end thereof, and a pedal bracket including a front bracket 4A and a rear bracket 4B. The pedal arm 2 is rotatably supported at its upper end by a pedal shaft 3 provided on a rear bracket 4B, and urges rearward turning force by a return spring 33 (not shown). I have.

The pedal bracket 4 includes a dash lower panel 13 at two positions above and below the front wall 5 of the front bracket 4A.
And the rear end of the upper wall 6 of the rear bracket 4B straddles the lower surface of the dash upper panel 14, specifically, the lower surface of the dash upper panel 14 and the rear wall. A bolt 18 and a nut 19 joined to the vehicle body side bracket 15 are fastened and fixed to the vehicle body side bracket 15 joined and arranged.

On the other hand, the front bracket 4A and the rear bracket 4B are formed at the rear of the front bracket 4A and at the front of the rear bracket 4B with bolt holes 7 through which bolts 21 for connecting the two are inserted. The bolt 21 is inserted into the rear toe of the bolt hole 7 of the front bracket 4A and the front toe of the bolt hole 7 of the rear bracket 4B and fastened. 4B is connected to be slidable rearward with respect to 4B.

The upper wall 6 of the rear bracket 4B is formed with a bolt insertion hole 8 which is a long hole in the front-rear direction for inserting the bolt 18, and a detachment slit 9 is formed on the front side of the bolt insertion hole 8. It is formed continuously.

The detachment slit 9 is provided at the head side of the bolt 18, that is, at a window 10 formed with a larger opening width than the bolt head and the washer 20, and a connection between the window 10 and the bolt insertion hole 8. And a taper 11 formed in the set portion.

The portion of the upper wall 6 of the rear bracket 4B where the bolt insertion hole 8 is formed is formed to bulge slightly higher than the general surface of the upper wall 6, and is inclined forward and connected to the general surface. A slope-shaped mounting surface 12 is formed.

The inside of the instrument panel, not shown,
That is, a steering member 16 having a circular cross-section (including a polygonal cross-section close to a circle) for supporting a steering column (not shown) is disposed in the vehicle width direction at an upper position near the rear end of the rear bracket 4B in the front. However, in this embodiment, the projecting height of the lower part of the vehicle body side bracket 15 is slightly increased, so that the bolt 18 of the upper wall 6 of the rear bracket 4B.
The position where the nut 19 is fixed is set to a height position where the rear end of the upper wall 6 has a height equal to or lower than substantially the lower half of the steering member 16.

The lower part of the steering member 16 is located at a position corresponding to the rear end of the rear bracket 4B.
The rear end of the rear bracket 4B is formed with a concave portion 17 through which the rear end of the rear bracket 4B can pass.

In FIG. 1, reference numeral 23 denotes a dash insulator provided on the side of the dash lower panel 13 on the vehicle interior side, and reference numeral 24 denotes a dash lower panel 13 and a front wall 5 of the pedal bracket 4.
2 shows a collar interposed in the bolt insertion hole.

According to the structure of the above embodiment, the pedal bracket 4 is mounted on the lower surface of the dash upper panel 14 by pivotally supporting the front bracket 4A fixed to the dash lower panel 13 and the upper end of the pedal arm 2. Since the rear bracket 4B is formed separately from the rear bracket 4B, and the front bracket 4A is connected to the rear bracket 4B so as to be slidable rearward, the dash lower panel 13 is deformed toward the cabin due to a frontal collision of the vehicle. Therefore, even if the front bracket 4A moves backward, the front bracket 4A only slides backward with respect to the rear bracket 4B, so that the rear bracket 4B can be prevented from moving backward, and the rear end of the rear bracket 4 It is possible to avoid interference with the steering member 16 disposed in the upper position in the vicinity. .

Further, the front bracket 4A and the rear bracket 4B are connected to each other at the rear of the front bracket 4A and at the front of the rear bracket 4B by inserting bolt holes 7 through which bolts 21 for connecting the both are inserted into the front and rear slots. The bolt 21 is inserted into the rear end of the bolt hole 7 of the front bracket 4A and the front end of the bolt hole 7 of the rear bracket 4B to connect the front bracket 4A and the rear bracket 4B. Since they are connected, a sufficient sliding stroke of the front bracket 4A with respect to the rear bracket 4B can be ensured.

Even if the amount of deformation of the dash lower panel 13 exceeds the sliding stroke of the front bracket 4A and a collision load is input to the rear bracket 4B,
When the input exceeds a predetermined load, the rear bracket 4B is attached so as to be detached from the dash upper panel 14, so that the rear bracket 4B is not restrained from moving by the dash upper panel 14, and accordingly,
A rearward upward moment about the mounting point of the upper wall 6 of the rear bracket 4B does not occur.

As a result, the rear bracket 4B does not retreat backward and obliquely upward, so that interference with the steering member 16 disposed at an upper position near the rear end of the rear bracket 4B is further avoided. It can be thorough.

When the rear bracket 4B separates from the dash upper panel 14 as described above, a separation slit 9 including a bolt insertion hole 8 and a window 10 is formed in the upper wall 6 of the rear bracket 4B. Therefore, the head side of the bolt 21 comes out of the detachment slit 9 without being caught, and the detachment action of the upper wall 6 of the rear bracket 4B can be performed smoothly.

Further, in the portion of the upper wall 6 of the rear bracket 4B where the bolt insertion hole 8 is formed, the mounting surface 12 is formed slightly higher than the general surface of the upper wall 6, so that the upper wall 6 is formed.
The contact area between the rear bracket 4B and the lower surface of the dash upper panel 14 is small, so that the frictional resistance when the rear bracket 4B retreats and separates can be reduced, and the mounting surface 12 has a slope shape inclined forward. Since it is bulged, the detaching action of the rear bracket 4B can be performed more smoothly.

The rear end of the upper wall 6 of the rear bracket 4B is set at a height position below the lower half of a substantially circular cross-section steering member 16 disposed in the vehicle width direction behind the rear bracket 4B. The rear bracket 4B moves backward, and the rear end is
Even if it interferes with the steering wheel 6, it is possible to prevent the collision input from acting on the steering member 16 by slipping under the steering member 16.

In particular, since the recess 17 is formed in the lower portion of the steering member 16 at a position corresponding to the rear end of the rear bracket 4B, when the rear bracket 4B moves backward as described above. , The rear end of this recess 1
7, so that the rear bracket 4B can be reliably prevented from interfering with the steering member 16.

Although the above embodiment has been described by taking the brake pedal as an example, it is needless to say that the present invention can be applied to a structure for mounting an accelerator pedal or a clutch pedal.

FIGS. 3 to 7 show a second embodiment of the present invention. In this embodiment, a bush 25 is connected to a pedal shaft 3 provided on a rear bracket 4B of the brake pedal unit 1 in the first embodiment. Cylindrical collar 2
4, a cylindrical boss 26 is provided at the upper end of the pedal arm 2, and the pedal arm 2 is rotatably fitted to the collar 24 via the boss 26. .

Numeral 27 is fixed to the side of the dash lower panel 13 on the engine room side.
2 shows a master bag that generates hydraulic pressure in a brake unit (not shown) by being pushed by pushing a push rod 28 through the pedal arm 2.

The push rod 28 of the master back 27 is connected via a pin 30 to the lower end of a push rod lever 29 pivotally supported on the pedal shaft 3.

The push rod lever 29 has a cylindrical boss 31 at the upper end thereof. The push rod lever 29 is rotatably and axially slidable on the collar 24 of the pedal shaft 3 via the boss 31. It is fitted freely.

The above-described pedal arm 2 and push rod lever 29 are integrally connected by a clutch means 32 in a normal state.
When the clutch means 32 is actuated by the detection operation, the pedal arm 2 and the push rod lever 29 are separated from each other.

In this embodiment, a return spring 33 is stretched between the pin 30 of the push rod lever 29 and the rear bracket 4B, and the pedal arm 2 is turned backward through the push rod lever 29. The power is energized.

In this embodiment, the clutch means 32 is formed on the opposing end faces of the boss 26 of the pedal arm 2 and the boss 31 of the push rod lever 29, and engages with the meshing part 34 which engages with each other. The push rod lever 29 is constituted by positioning means 35 which urges the push rod lever 29 in the direction in which the meshing portion 34 is engaged, that is, toward the pedal arm 2 along the axial direction of the pedal shaft 3.

The positioning means 35 engages the clutch arm 36 for actuating the push rod lever 29 in the axial direction of the collar 24, and the engaging portion 34 engages the push rod lever 29 by pushing the clutch arm 36 to one side. 37 as a positioning member for urging in the axial direction in the direction
It consists of:

The clutch arm 36 has a cylindrical boss 38 and a fork 39, and an arm shaft 40 fixed to the pedal bracket 4 in parallel with the pedal shaft 3.
The fork 39 is rotatably fitted via the boss 38 and slidably in the axial direction of the arm shaft 40. The push rod lever 29 is connected so as to be able to move in the axial direction of the collar 24 by engaging with the upper and lower portions of the boss portion 31 while straddling.

The spring 37 is mounted on the arm shaft 41 between one side wall of the pedal bracket 4 and the boss 38 of the clutch arm 36.

Reference numeral 41 denotes a collision detecting means for detecting the collision at the time of frontal collision of the vehicle and disengaging and operating the clutch means 32. In this embodiment, the collision detecting means 41 is rotatably supported by the arm shaft 40 via a boss 43. And a collision detection lever 42 that rotates by engaging with an engagement portion 44 provided at a rear portion of the front bracket 4A, and a boss portion 43 of the collision detection lever 42.
And a cam part 45 formed on the opposing end faces of the boss part 38 of the clutch arm 36 and engaged with each other.

When the vehicle frontally collides and the front bracket 4A slides rearward with respect to the rear bracket 4B, the collision detection lever 42 engages with the engaging portion 44 at the rear of the front bracket 4A and rotates. By this rotation, the cam arm 45 moves the clutch arm 36 along the axial direction of the arm shaft 40 against the spring force of the spring 37, thereby releasing the engagement of the engagement portion 34 of the clutch means 32. . That is, the spring 37 is displaced when a predetermined load is exceeded.

Accordingly, the cam portion 45 is provided with the boss portions 38, 4
The end faces 3 are formed as slopes at the same required lead angle so that they are in close contact with each other.

In this embodiment, the push rod lever 29 is normally engaged with the front and rear side edges of the pedal arm 2 to connect them, and the push rod lever 29 is engaged by the clutch means 32. A claw portion 47 is provided which is disengaged when the pedal arm 2 and the pedal arm 2 are separated.

In FIG. 3, reference numeral 46 denotes a stopper for restricting the rearward rotation of the pedal arm 2.

As shown in FIG. 5, a bead 48 is provided at the base of the engaging portion 44 so that the bead 48 does not deform when it slides rearward and engages with the lever 42.

According to the structure of the second embodiment, in addition to the effects of the first embodiment, in a normal state, the engaging portion 34 of the clutch means 32 is in the engaged state, and the pedal arm 2 and the push rod Since the lever 29 and the lever 29 are integrally connected, the pedal arm 2 and the push rod lever 29 rotate integrally by the depressing operation of the pedal arm 2, and push the push rod 28 as in a general brake pedal device. To operate the master bag 27.

On the other hand, when a vehicle collides from the front and another functional part in the engine room interferes with the master back 27 and is pushed rearward, or the functional part in the engine room interferes with the dash lower panel 13, and the like. The dash lower panel 13 is deformed toward the cabin, and the dash lower panel 1
When the front bracket 4A slides rearward with respect to the rear bracket 4B with the deformation of the front bracket 4A toward the cabin, the engagement portion 44 at the rear of the front bracket 4A and the collision detection lever 42 of the collision detection means 41 are engaged. It rotates backward.

When the collision detection lever 42 is rotated backward, the clutch arm 36 of the clutch means 32 moves axially on the arm shaft 40 against the spring force of the spring 37 by the guide action of the cam portion 45. The push rod lever 29 is moved by the clutch arm 36 so that the
The push rod lever 29 and the pedal arm 2 are separated from each other by being moved in a direction in which the engagement of the push rod 4 is released.

As a result, even if the master back 27 moves backward and a pushing force is applied to the push rod lever 29 backward by the push rod 28, only the push rod lever 29 swings idly, and the pedal A collision load is not input to the arm 2, and it is possible to prevent a load from acting on the driver's foot that has depressed the pedal arm 2 to cause a feeling of strangeness or to give a shock.

In particular, in this embodiment, the return spring 33 of the pedal arm 2 is stretched across the pin 30 connecting the push rod 28 at the lower end of the push rod lever 29 and the rear bracket 4B. When the clutch means 32 is disengaged as described above, the push rod lever 29 is instantaneously rotated to the disengaged position of the meshing portion 34 by the urging force of the return spring 33, and the pedal arm 2 is freely moved. At the same time, since the urging force of the return spring 33 to the pedal arm 2 is released, no load acts on the driver's foot.

In addition to the fact that the collision detecting means 41 is mechanically constituted by a collision detecting lever 42 pivotally supported by the arm shaft 40 and a cam part 45, the clutch means 32 is also mechanically connected to the engaging part 34 and the arm shaft 40. Mechanically constituted by the clutch arm 36 and the positioning means 35 comprising a spring 37, the structure can be simplified and the cost can be advantageously obtained.

Further, the vibration can be absorbed by the spring 37 and the rattling of the clutch arm 36 can be eliminated, so that the quality can be improved.

Further, since the clutch arm 46 slides in the axial direction along the arm shaft 40 parallel to the pedal shaft 3, the push rod lever 29 slides smoothly on the pedal shaft 3 in the axial direction. Thus, the clutch operation can be smoothly performed.

In addition, since the push rod 29 is provided with the claw portion 47 which is normally engaged with the pedal arm 2, the connection strength between the pedal arm 2 and the push rod lever 29 in a normal state can be increased.

As the positioning member, a cylindrical collar which is deformed in the axial direction when a predetermined load is exceeded may be used instead of the spring 37. In this case, the collar is deformed in the axial direction beyond the predetermined load. Thus, it is preferable to provide a trigger for deformation by providing a slit in the collar or the like.

In addition to the above, an electromagnetic clutch can be used as the clutch means 32, and a collision sensor for operating an airbag device usually mounted on a vehicle can be used as the collision detection means 41. it can.

In the above embodiment, the push rod lever 29 is slidable. However, the pedal arm 2 may be slidable. In this case, the push rod lever 29 is extended downward in FIG. The pedal arm 2 in FIG. 3 is shortened to become a push rod lever.

Although the claw portion 47 is formed on the push rod 29 side, it is needless to say that the claw portion 47 may be formed on the pedal arm 2.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of the pedal bracket of the embodiment.

FIG. 3 is a side view showing a second embodiment of the present invention.

FIG. 4 is a plan view of a pedal bracket according to a second embodiment.

FIG. 5 is an enlarged explanatory view of an engaging portion in FIG. 4;

FIG. 6 is a sectional view showing a main part of the second embodiment.

FIG. 7 is a sectional view showing an engaged state of the claw portion of FIG. 3;

[Explanation of symbols]

 2 Pedal arm 3 Pedal shaft (support shaft) 4 Pedal bracket 4A Front bracket 4B Rear bracket 6 Upper wall 7 Bolt hole 8 Bolt insertion hole 9 Detachment slit 10 Window 11 Taper 12 Mounting surface 13 Dash lower panel 14 Dash upper panel 16 Steering Member 17 Concave part 18 Bolt 21 Bolt 26 Boss part of pedal arm 27 Master back 28 Push rod 29 Push rod lever 31 Boss part of push rod lever 32 Clutch means 33 Return spring 34 Meshing part 35 Positioning means 36 Clutch arm 37 Spring (positioning member) 38) Boss part of clutch arm 40 Arm shaft 41 Collision detection means 42 Collision detection lever 43 Boss part of collision detection lever 44 Engagement part 45 Cam part 7 claw portion

Claims (14)

[Claims] 1. A structure in which a pedal bracket rotatably supporting an upper end of a pedal arm is mounted across a dash lower panel and a dash upper panel, wherein a front bracket fixing the pedal bracket to the dash lower panel is provided. Pivotally support the upper end of the pedal arm,
A pedal bracket structure for an automobile, wherein the pedal bracket structure is divided into a rear bracket attached to a lower side of a dash upper panel and a front bracket is connected to the rear bracket so as to be slidable rearward. 2. A front part of the front bracket and a front part of the rear bracket are formed with a bolt hole for inserting a bolt for connecting the both in a longitudinal direction, and a rear toe of the bolt hole of the front bracket. The pedal bracket structure for an automobile according to claim 1, wherein the front bracket and the rear bracket are connected by inserting the bolt into the front part of the rear bracket and the bolt hole of the rear bracket. 3. An upper wall of the rear bracket abuts against a lower surface of the dash upper panel, and is fixed so as to separate from the dash upper panel when an impact acting on the rear bracket in a retreating direction exceeds a predetermined load. An automobile pedal bracket structure according to claim 1 or 2, wherein: 4. An upper wall of the rear bracket is attached to a lower surface of the dash upper panel in a forwardly inclined state, and a bolt insertion hole for inserting a fixing bolt is formed in the upper wall. A detachment slit having a window formed at the front side of the bolt insertion hole with a larger opening width than the head side of the bolt and having a window portion that comes out from the head side of the bolt when the rear bracket is moved backward. Claim 3
2. The pedal bracket structure for an automobile according to claim 1. 5. A slope-shaped mounting surface which is formed so as to bulge slightly higher than a general surface of the upper wall and is inclined forward, in a portion of the upper wall of the rear bracket where the bolt insertion hole is formed. 5. The pedal bracket structure for an automobile according to claim 4, wherein: 6. A rear position of the upper wall of the rear bracket is set at a height position which is substantially equal to or lower than a lower half portion of a steering member having a substantially circular cross section disposed in the vehicle width direction behind the rear bracket. An automobile pedal bracket structure according to any one of claims 3 to 5, characterized in that: 7. A lower portion of the steering member is formed at a position corresponding to a rear end of the rear bracket with a recess through which the rear end can pass through when the rear bracket is moved backward. Item 7. An automobile pedal bracket structure according to any one of Items 3 to 6. 8. A push-back of a master back, which is urged rearward by a pedal arm rotatably supported on a pedal shaft provided on a rear bracket and is rotatably supported on the pedal shaft. A push rod lever connected to a rod; and a clutch means for normally connecting the pedal arm and the push rod lever integrally, and separating the pedal arm and the push rod lever by a detection action of the collision detection means. The pedal bracket structure for an automobile according to any one of claims 1 to 7, wherein: 9. A boss end face wherein one of a push rod lever and a pedal arm is slidably supported in an axial direction of a pedal shaft, and a clutch means is formed on each shaft of the pedal arm and the push rod lever. And a meshing portion that is engaged with the push rod lever and the pedal arm, and is positioned so that the meshing portion of the push rod lever and the pedal arm is normally engaged with each other. 9. A pedal bracket for an automobile according to claim 8, wherein said positioning means is capable of allowing one of said members to move in a direction in which said engagement portion is disengaged along the axial direction of said pedal shaft. Construction. 10. A clutch arm, wherein a positioning means is axially slidably supported by an arm shaft provided on a rear bracket in parallel with the pedal shaft and connected to either a push rod lever or a pedal arm.
10. The pedal bracket structure for an automobile according to claim 9, wherein said clutch arm is configured to be positioned at a predetermined position in the axial direction of said arm shaft and to be displaced when a predetermined load is exceeded. 11. A collision detecting means rotatably supported by an arm shaft, and a front bracket retreats by a collision load, thereby engaging with an engaging portion provided at a rear portion of the front bracket and rotating. The collision detection lever and the clutch arm and the boss formed on each shaft support of the collision detection lever are formed on the end faces and engaged with each other, and the rotation of the collision detection lever causes the clutch arm to resist the positioning force of the positioning member. 11. The pedal bracket structure for an automobile according to claim 10, wherein the cam bracket moves in a direction in which the engagement portion is disengaged along the axial direction of the arm shaft. 12. The pedal bracket structure for an automobile according to claim 10, wherein the positioning member is constituted by a spring for urging the clutch arm in the axial direction of the arm shaft. 13. A push rod lever or a pedal arm, which normally engages with the other front and rear side edge to connect both of them, and wherein said push rod lever and said pedal arm are connected by said clutch means. The pedal bracket structure for an automobile according to any one of claims 8 to 12, wherein a claw portion is provided which is disengaged when the arm is separated from the arm. 14. The method according to claim 8, wherein a return spring is stretched across the rear bracket and the push rod lever to urge rearward turning power to the pedal arm via the push rod lever. 14. The pedal bracket structure for an automobile according to any one of claims 13 to 13.