JP2013003886A - Pedal device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the pedal device of a vehicle in which any looseness is hardly generated even in the case of inserting an axial member of a first link member into a through-hole of a pedal arm composed of hollow pipe materials for connection.SOLUTION: The upper end of a pedal arm 2 composed of hollow pipe materials is supported on a dash panel so as to be rotatable, and a first link member 18 is connected to a push rod of a master cylinder, and an axial member 20 installed in the first link member 18 is inserted into a through-hole 4 of the pedal arm 2 so that the first link member 18 can be mounted on the pedal arm 2 so as to be rotatable, an outer periphery of the axial member 20 is covered with a wave washer 29, a cover ring 21 is mounted on an insertion top end of the axial member 20 into the pedal arm 2, and the wave washer 29 is interposed between the cover ring 21 and the pedal arm 2 or between a level difference part 20a formed at the axial member 20 and the pedal arm 2 so that any looseness between the pedal arm 2 and the first link member 18 can be absorbed by the elastic force of the wave washer 29.

Description

  The present invention relates to a pedal device for a vehicle, such as a brake pedal for a vehicle, and in particular, a pedal retraction suppression that suppresses a movement of a pedal arm to the rear of the vehicle when a dash panel attempts to move to the rear of the vehicle due to a load from the front of the vehicle. It is suitable for the mechanism.

  As a pedal device provided with such a pedal retraction suppression mechanism, there is one described in Patent Document 1 below proposed by the present applicant, for example. In this pedal device, a lower end portion of a first link member is rotatably attached to a pedal arm to which a brake pedal is attached, an intermediate portion of the first link member is connected to a push rod of a master cylinder, and a first link member The lower end portion of the second link member is rotatably connected to the upper end portion of the second link member, and the upper end portion of the second link member is hooked on the pedal shaft member, which is the rotation shaft of the pedal arm, from the front of the vehicle. The pedal bracket for attaching the pedal arm to the dash panel is provided with a trigger interposed between the second link member and the steering column. According to this pedal device, when the dash panel tries to move rearward due to a load from the front of the vehicle, the trigger contacting the steering column pushes the second link member relatively toward the front of the vehicle, and accordingly the second The upper end of the link member is disengaged from the pedal shaft member, allowing the first link member to rotate, allowing the change in the relative position between the push rod and the pedal arm of the master cylinder to be moved backward by being pushed by the push rod. The movement of the pedal arm is suppressed.

Japanese Patent No. 4006676

By the way, in the pedal device of the vehicle described in Patent Document 1, the pedal arm is made of a plate material such as a steel plate. Recently, the pedal arm is made of a hollow pipe material in order to improve the strength and reduce the weight. There is a growing demand to do so.
However, when the pedal arm is constituted by a hollow pipe material and the link member is axially supported, for example, the shaft member of the first link member disclosed in Patent Document 1 is formed in a pedal arm made of a hollow pipe material. When the two holes are connected so as to be rotatable, it is difficult to ensure the dimensional accuracy of the through hole in the axial direction, and the shaft member is loose in the through hole, so that abnormal noise is likely to occur. In particular, in a pedal adapted to a vehicle, the sound generated by the vehicle's running vibration and the driver's operation significantly reduces the merchantability of the vehicle.

  The present invention has been made paying attention to the above problems, and even when the shaft member of the first link member is inserted and connected to the through hole formed in the pedal arm made of the hollow pipe material, the first is provided. An object of the present invention is to provide a pedal device for a vehicle in which rattling of a link member hardly occurs.

  In order to solve the above-described problems, an embodiment of the present invention includes a pedal arm made of a hollow pipe member whose upper end portion is rotatably supported by a dash panel, and a push rod of a master cylinder that is rotatably attached to the pedal arm. A first link member coupled to the shaft, a shaft member provided in the first link member and inserted into a through hole of the pedal arm, and a retaining ring attached to a distal end portion of the shaft member inserted into the pedal arm; And a vehicular pedal device provided with a corrugated washer interposed between the retaining ring and the pedal arm or between a stepped portion formed on the shaft member and the pedal arm. .

  In another embodiment, the shaft member is provided in an intermediate portion of the first link member, a lower end portion of the first link member is connected to a push rod of a master cylinder, and the pedal arm is attached to the dash panel. A pedal bracket interposed between the pedal bracket, a pedal shaft for rotatably mounting an upper end portion of the pedal arm to the pedal bracket, a lower end portion rotatably connected to the upper end portion of the first link member, and an upper end portion of the pedal bracket. A second link member detachably attached to the pedal shaft from the front of the vehicle; and a trigger member attached to the pedal bracket and interposed between the second link member and the column bracket, the shaft member and the pedal shaft; This is a pedal device for a vehicle in which a connection point between the first link member and the second link member is arranged at the rear of the vehicle rather than a straight line connecting the two.

  Thus, in the embodiment of the invention, the upper end portion of the pedal arm made of the hollow pipe material is rotatably supported on the dash panel. Further, by inserting a shaft member provided on the first link member into the through hole of the pedal arm, the first link member is rotatably attached to the pedal arm, and the first link member is connected to the push rod of the master cylinder. . Then, a corrugated washer is placed on the outer periphery of the shaft member, and a retaining ring is attached to the distal end of the shaft member of the first link member inserted into the pedal arm. The corrugated washer is interposed between the retaining ring and the pedal arm or between the stepped portion formed on the shaft member and the pedal arm. Therefore, the backlash between the pedal arm and the first link member is absorbed by the elastic force of the wave washer.

  Further, the pedal arm and the first link member are rotatably connected by a shaft member provided at the intermediate portion of the first link member, and the lower end portion of the first link member is connected to the push rod of the master cylinder. The lower end of the second link member is rotatably connected to the upper end of the first link member, and the upper end of the second link member is hooked on the pedal shaft from the front of the vehicle. In that case, the connection point of the 1st link member and the 2nd link member is arranged behind vehicles rather than the straight line which connects a shaft member and a pedal axis. A trigger member interposed between the second link member and the column bracket is attached to the pedal bracket. Therefore, when the dash panel is about to move rearward due to a load from the front of the vehicle, the trigger member that contacts the column bracket relatively pushes the second link member forward, and accordingly, the second link member The pedal arm is disengaged from the pedal shaft and the pedal arm is pushed relatively forward with the first link member to prevent the pedal arm from moving rearward of the vehicle. At this time, since the backlash between the pedal arm and the first link member is absorbed by the corrugated washer, the movement of the pedal arm to the rear of the vehicle can be reliably suppressed and prevented.

It is a disassembled perspective view of the brake pedal apparatus which shows one Embodiment of the pedal apparatus of the vehicle of this invention. It is a side view which shows the state of the normal time of the brake pedal apparatus of FIG. It is a front view which shows the state of the normal time of the brake pedal apparatus of FIG. It is a top view which shows the state at the normal time of the brake pedal apparatus of FIG. It is a perspective view of the trigger of the brake pedal apparatus of FIG. It is a side view which shows a state when the load from the vehicle front of the brake pedal apparatus of FIG. 1 is added. It is sectional drawing of the link connection structure of the brake pedal apparatus of FIG.

Next, an embodiment of a pedal device for a vehicle according to the present invention will be described with reference to the drawings.
1 to 4 are detailed explanatory views of the brake pedal device of the present embodiment. The brake pedal device 1 is provided below the vehicle compartment S2 side of the dash panel 7 that divides the engine compartment S1 and the vehicle compartment S2 in the same manner as an existing vehicle. In addition, a steering column 27 that rotatably houses a steering shaft 28 is disposed behind the brake pedal device 1, and a lower end portion of the steering column 27 is attached to a column bracket 23 attached to a steering support member. A universal joint (not shown) is attached to the lower end portion of the steering shaft 28. The steering shaft 28 is connected to the steering gear via the universal joint and an intermediate shaft, and a steering wheel (not shown) is connected to the upper end portion of the steering shaft 28. Is installed.

  At the front portion of the steering column 27 of the dash panel 7, a pedal arm 2 having a pedal 5 attached to the lower end portion is pivotally supported, and a pedal bracket 8 for attaching the pedal arm 2 to the dash panel 7 is attached. It has been. The pedal bracket 8 is a substantially U-shaped metal plate member having side walls 8A and 8B on both sides in the vehicle width direction, and is bent along the dash panel 7 from the side of the dash panel 7 below the side walls 8A and 8B. The brake pedal device 1 is attached to the dash panel 7 by having flanges 8a and 8b extended so as to extend in the vehicle width direction, and attaching the flanges 8a and 8b to the dash panel 7 with bolts (not shown). . A master cylinder 9 for generating the hydraulic pressure of the brake device is mounted with a brake booster on the engine room S1 side of the dash panel 7 between the two side walls 8A and 8B of the pedal bracket 8 and the flanges 8a and 8b. Yes. Reference numeral 9 a in the figure is a push rod of the master cylinder 9.

  The pedal arm 2 of the brake pedal device 1 is formed of a hollow pipe material, and a cylindrical pedal shaft 3 that is a swing shaft of the pedal arm 2 is penetrated and fixed in the vehicle width direction at an upper end portion. Further, a through hole 4 is provided in the intermediate portion of the pedal arm 2 in the vehicle width direction. A pedal 5 is attached to the lower end of the pedal arm 2 for the driver to operate with his / her foot. The pedal 5 includes a rectangular metal plate 5a fixed to the lower end portion of the pedal arm 2, and a rubber pad 5b bonded to the upper surface of the metal plate 5a. A metal operation member 6 for pressing a brake lamp switch (not shown) is attached to the middle portion of the pedal arm 2 and on the upper right side of the through hole 4. As will be described later, a bush portion 4 a is formed integrally with the pedal arm 2 on the inner peripheral surface of the through hole 4. Further, a bracket 10 is provided in a middle portion of the right side wall 8B of the pedal bracket 8 at a portion facing the operation member 6, and a brake lamp (not shown) is provided in an attachment hole 10a formed in the bracket 10. The switch is fitted and fixed.

  In order to rotatably attach the pedal arm 2 to the pedal bracket 8, a bolt through hole 8c (only the side wall 8A on the front side in FIG. 1 is provided in a portion of the side wall 8A, 8B of the pedal bracket 8 facing the vehicle width direction. The through hole of the side wall 8B shown in the figure is hidden by the trigger 15). Then, a small-diameter cylindrical collar 11 is inserted into the cylindrical pedal shaft 3 at the upper end of the pedal arm 2, and the outer periphery of both end portions in the axial direction of the collar 11 and the inner periphery of both end portions in the axial direction of the pedal shaft 3. A frictional resistance reducing and positioning bushing 12 having a flange portion in contact with the end surface of the pedal shaft 3 is inserted into the gap. In this state, the pedal arm 2 is inserted between the two side walls 8A and 8B of the pedal bracket 8, both axial ends of the pedal shaft 3 at the upper end of the pedal arm 2 (specifically, the flange portion of the bush 12) and the collar. 11 is attached to the bolt through-holes 8c of the two side walls 8A and 8B, the inner diameter of the collar 11 is aligned with the position of the bolt through-hole 8c, and the above-described bolt through-holes 8c (not shown) from the outside of the one side wall 8B. The shaft portion of the bolt 13 is inserted into the collar 11 and passed through the collar 11 and the bolt through hole 8c of the other side wall 8A, and then the nut 14 is screwed into the protruding portion of the bolt 13 to tighten the collar 11. Thereby, the pedal arm 2 is attached to the pedal bracket 8 so as to be rotatable in the vehicle front-rear direction around an axis in the vehicle width direction.

  Then, the pedal arm 2 is connected to the push rod 9 a of the master cylinder 9 via the first link member 18. The first link member 18 is a rectangular metal plate member that is arranged so that the upper end portion is on the rear side of the vehicle and the lower end portion is on the front side of the vehicle in the normal state. In the present embodiment, the first link member 18 is the left side of the pedal arm 2. Is arranged. Further, an approximately cylindrical shaft member 20 is provided at the intermediate portion of the first link member 18 so as to protrude toward the pedal arm 2, that is, rightward (rightward of the vehicle, see FIG. 3). The shaft member 20 has a large-diameter portion on the first link member 18 side and a small-diameter portion on the distal end side, and a step portion 20a is formed between the large-diameter portion serving as an intermediate portion and the small-diameter portion. A circumferential groove 20b is formed at the tip of the small diameter portion so as to surround the small diameter portion. This shaft member 20 is inserted into the through-hole 4 of the pedal arm 2, and in this embodiment, an annular corrugated washer 29 is fitted to the protruding tip, and a retaining ring 21 such as an E-type clip is attached to the circumferential groove 20b. The shaft member 20 (first link member 18) is rotatably attached to the pedal arm 2. The operation of the corrugated washer 29 will be described in detail later.

  The lower end portion of the first link member 18 is rotatably connected to the push rod 9 a of the master cylinder 9 by a pin 24. Specifically, the push rod 9a is rotatably connected to the lower end portion of the first link member 18 that is slightly lower in front than the position of the shaft member 20. Further, two springs 25 and 26 made of coil springs are disposed on the outer periphery of the pedal shaft 3, and these two springs 25 and 26 are attached by inserting the pedal shaft 3 into respective coil portions. Yes. One end of the coil of one of the springs 26 is hung on the left side wall 8A of the pedal bracket 8 from the rear of the vehicle, and the other end is on the lower end of the first link member 18 below the shaft member 20. It is hung from the front of the vehicle. Due to the urging force of the spring 26, the pedal arm 2 is always provided with a rotational force that rotates rearward of the vehicle via the first link member 18. For example, when the pedal 5 is stepped on with a foot, the pedal arm 2 is moved forward of the vehicle. When the foot is released after the rotation, the pedal arm 2 rotates backward and returns. The other spring 25 will be described in detail later.

  Although the brake pedal apparatus 1 is comprised by the above structure, in this embodiment, this brake pedal apparatus 1 is provided with the pedal retraction suppression mechanism. This pedal retraction suppression mechanism suppresses the movement of the pedal arm 2 and the pedal 5 toward the rear of the vehicle when the dash panel 7 is about to move toward the rear of the vehicle due to a load from the front of the vehicle. A link mechanism 16 including a member 18 and a second link member 19 to be described later, and a trigger 15 attached to the pedal bracket 8 are configured.

  The second link member 19 is a metal plate member disposed between the first link member 18 and the pedal shaft 3. The lower end portion of the second link member 19 is rotatably connected to the upper end portion of the first link member 18 (the portion located above the shaft member 20 provided in the intermediate portion) with a pin 17. Further, as shown in FIGS. 1 and 6, etc., a substantially semicircular recess that matches the outer shape of the pedal shaft 3 is formed at the upper end portion of the second link member 19, and the recess is a flange portion 19a. In normal times, the flange portion 19a is hooked on the pedal shaft 3 from the front of the vehicle. Since the flange portion 19a is configured to be detached from the pedal shaft 3 when pushed from the rear of the vehicle, for example, the upper end portion of the second link member 19 is configured to be detachable from the pedal shaft 3. The second link member 19 is normally engaged with the pedal shaft 3 to connect the first link member 18 and the pedal shaft 3 and prevents the first link member 18 from rotating, thereby It acts as a member that enables transmission of the movement of the pedal arm 2 to the push rod 9a by the driver's stepping operation. With this configuration, the pin 17, that is, the first link member 18 and the second link member is more than the straight line connecting the connecting point between the shaft member 20, that is, the pedal arm 2 and the first link member 18, and the pedal shaft 3. The connection point with 19 is located behind the vehicle, and the second link member 19 receives the force in the compression direction to prevent the rotation of the first link member 18. The rotation of the first link member 18 (rotation in the counterclockwise direction in FIG. 2 with the shaft of the shaft member 20 as the rotation center) is applied to the lower end portion of the first link member 18 below the shaft member 20 from the vehicle front side. The first link member so that the axial line passes below the shaft member 20 with respect to the urging force of the spring 26 that is hooked and presses the engaging portion toward the rear side of the vehicle and the stepping operation of the driver. This is due to the reaction force received from the push rod 9 a connected to the 18.

  One end of the other spring 25 having the coil portion arranged on the outer periphery of the pedal shaft 3 is hung on the pedal arm 2 from the rear of the vehicle, and the other end is connected to the second link member 19 on the front of the vehicle. The second link member 19 is biased toward the vehicle rear side with respect to the pedal arm 2. Therefore, the second link member 19 is always connected to the pedal shaft 3 with a flange 19a formed at the upper end of the second link member 19 around the connection point with the first link member 18, that is, the pin 17 as the rotation center. A rotational force for rotating the vehicle to the rear side, which is the direction to be engaged, is applied, and normally, the flange portion 19a at the upper end portion of the second link member 19 is maintained in a state of being caught by the pedal shaft 3.

  FIG. 5 shows details of the trigger 15. The trigger 15 is formed by pressing a metal plate member. The trigger 15 is formed in a substantially T shape by a vertical portion 15A and a horizontal portion 15B located at the upper end of the vertical portion 15A. Among these, the vertical portion 15A is formed in a U-shape, the upper end portion and the lower end portion protrude to the front side of the vehicle, and the middle portion in the vertical direction is disposed on the rear side of the vehicle. And the contact part 15a is formed by bending the protrusion front-end | tip part of a lower end part in a horizontal direction. Further, both sides of the horizontal portion 15B in the vehicle width direction are bent vertically upward to be provided with flange portions 15b. Further, a notch 15c that facilitates displacement of the vertical portion 15A is formed at a connection portion between the horizontal portion 15B and the vertical portion 15A.

  A reinforcement bracket 22 bent in an L-shape is attached to the left side surface of the vertical portion 15A of the trigger 15 below the intermediate portion in the vertical direction by spot welding. The reinforcing bracket 22 is welded to the vertical portion 15A of the trigger 15 to reinforce the lower half portion of the vertical portion 15A, and the horizontal left side from the upper end edge of the reinforcing portion 22B at the middle portion in the vertical direction of the vertical portion 15A. And a contact portion 22A whose rear end edge is substantially at the same position as the rear end edge of the intermediate portion of the vertical portion 15A.

  The trigger 15 to which such a reinforcing bracket 22 is attached is attached to the pedal bracket 8 as shown in FIGS. 2 and 3, for example. That is, the trigger 15 is inserted between the two side walls 8A and 8B of the pedal bracket 8, and the two vertical flange portions 15b provided on the horizontal portion 15B of the trigger 15 are fixed by welding to the respective side walls 8A and 8B. Accordingly, the contact portion 15a at the lower end of the vertical portion 15A of the trigger 15 is positioned behind the second link member 19 so as to face the second link member 19 of the pedal retraction suppression mechanism with a predetermined gap. The contact portion 22A of the reinforcing bracket 22 is positioned in front of the column bracket 23 so as to face the column bracket 23 with a predetermined gap.

  The above state is normal. In this normal state, since the collar portion 19a of the second link member 19 is caught by the pedal shaft 3, the relative rotation of the first link member 18 with respect to the pedal arm 2 is restricted, and when the pedal 5 is stepped on with a foot, the pedal is depressed. The pedal arm 2 rotates about the shaft 3 forward of the vehicle, and the first link member 18 whose relative position with the pedal arm 2 does not change pushes the push rod 9a of the master cylinder 9 forward of the vehicle. The wheel cylinder is activated by the generated hydraulic pressure to generate a braking force. As described above, when the foot is released from the pedal 5, the pedal 5 rotates together with the pedal arm 2 to the rear of the vehicle by the elastic force of one spring 26 and the master cylinder or the brake booster and returns to the return position.

  In this normal state, when a load is applied from the front of the vehicle and the dash panel 7 moves to the rear of the vehicle, the brake pedal device 1 attached to the dash panel 7 is also moved to the rear of the vehicle. FIG. 6 shows details of the brake pedal device 1 when a load is applied from the front of the vehicle and the vehicle moves backward. When the brake pedal device 1 is moved to the rear of the vehicle together with the dash panel 7, the pedal bracket 8 is also moved to the rear of the vehicle. Then, the rear end edge of the intermediate portion of the vertical portion 15A of the trigger 15 attached to the pedal bracket 8 and the contact portion 22A of the reinforcing bracket 22 come into contact with the column bracket 23, and the trigger 15 is prevented from retreating and the brake pedal device. 1, the trigger 15 moves relatively forward of the vehicle. As the trigger 15 moves relative to the front of the vehicle, the contact portion 15a formed at the lower tip of the trigger 15 comes into contact with the second link member 19 from the vehicle rear side, and the biasing force of the spring 25 is applied. Accordingly, the second link member 19 is relatively pushed forward of the vehicle, and the flange portion 19 a at the upper end portion is detached from the pedal shaft 3. When the flange portion 19a is disengaged from the pedal shaft 3, the first link member 18 can be rotated (rotation with the shaft of the shaft member 20 as the center of rotation), and the shaft member is driven by the biasing force of the spring 26 and the force received from the push rod 9a. The first link member 18 rotates counterclockwise in FIG. 6 around the axis 20, and the positional relationship between the push rod 9 a and the pedal arm 2 changes. As the positional relationship changes, the pedal arm 2 rotates in the clockwise direction of FIG. 6, that is, the vehicle front side, and the movement of the pedal arm 2 and the pedal 5 toward the vehicle rear is suppressed. At this time, the pin 17, that is, the first link member 18 and the second link are connected to the shaft member 20, that is, the straight line connecting the pedal shaft 3 and the connecting point between the pedal arm 2 and the first link member 18 in a normal state. Since the connection point with the link member 19 is located at the rear of the vehicle, the second link member 19 receives the rotation of the first link member 18 (counterclockwise rotation in FIG. 6) as a force in the compression direction. When the second link member 19 is pushed forward of the vehicle by the trigger 15, the engagement of the second link member 19 (engagement of the flange portion 19a and the pedal shaft 3) can be reliably released, and the pedal arm 2 and The movement of the pedal 5 toward the rear of the vehicle is reliably suppressed.

  As shown in FIG. 7a, in this embodiment, in the support portion of the first link member 18 of the pedal arm 2 in the brake pedal device 1 with such a pedal retraction suppressing mechanism (attachment portion of the shaft member 20 and the pedal arm 2). A corrugated washer 29 is interposed between the pedal arm 2 and the retaining ring 21. The corrugated washer 29 is also called a wave washer or the like, and is curved in a wave shape when the annular washer is viewed from the direction perpendicular to the axis (the axis here refers to the axis of the shaft-like member inserted into the corrugated washer 29). It is made into a shape. When the wavy corrugated washer 29 is compressed in the axial direction, its wave shape can be elastically deformed, and a restoring force (elastic force) is generated in the elastically deformed state. In this embodiment, the backlash of both is absorbed with the elastic force of the corrugated washer 29 interposed between the pedal arm 2 and the retaining ring 21.

  The pedal arm 2 of the present embodiment is formed by bending a hollow pipe material. The hollow pipe material is pressed and deformed from the left and right direction of the vehicle, and as shown in FIG. 7, the cross section has an oval shape having a long axis in the front and rear direction of the vehicle. For this reason, the accuracy of the distance between the left and right surfaces cannot be increased. And the distance accuracy between the two right and left surfaces of the through hole portion (peripheral portion of the through hole) cannot be increased simply by forming the through holes on the two left and right surfaces. Further, the accuracy of the coaxiality of the through holes provided on the left and right surfaces cannot be increased. For this reason, when attaching a shaft member to the through-hole provided in two right and left surfaces of the pedal arm 2 in a penetrating state, an axial gap is necessary in consideration of dimensional variation and assemblability. The axial position of the shaft member cannot be determined using the distance, and the structure has a backlash (a gap in the axial direction or a gap in the radial direction). In addition, in order to improve the accuracy of the through hole in the axial direction, there is a method of welding and fixing a separate cylindrical member as in the case of the pedal shaft 3 attached to the upper end portion of the pedal arm 2, but the number of parts is reduced. As it increases, productivity deteriorates and costs increase.

  In the structure in which the support portion between the pedal arm 2 and the first link member 18 is rattling as described above, an abnormal noise is generated when the pedal 5 after the pedal operation returns to the origin position or when the pedal arm 2 vibrates. As a result, the merchantability is significantly reduced.

  The processing accuracy of drilling a through hole with a drill to the pedal arm 2 made of a hollow pipe material is not high, and the accuracy of the periphery of the through hole is not high. In this embodiment, a bush portion (also referred to as a lining) 4a is formed at the peripheral portion of the through hole 4 simultaneously with the drilling of the through holes 4 on the two left and right surfaces, and the axial dimensions of the through holes 4 on the two left and right surfaces. Improves accuracy. In this processing method, a tool that rotates at high speed is brought into contact with the workpiece with a large pressing force, and the processing location (through-hole formation location) and its surroundings are reddened by frictional heat and the tool is pushed into the workpiece, A through hole is formed, and the tool is formed into a shape having a shaft portion for forming a through hole and a flange portion having a diameter larger than that of the shaft portion. While pressing the flange part of the tool against the peripheral edge of the through hole, stop pressing at the desired position, and make the peripheral edge of the through hole of the workpiece follow the shape of the tool, and the peripheral edge of the through hole from the surface of the pipe material A protruding bush portion (lining) is formed. The tool for this processing is arranged on both sides of the pedal arm 2 and simultaneously drills the through holes 4 on the left and right surfaces. The distance from one end surface to the other end surface of the bush portion 4a formed in a protruding state on the periphery of the through hole 4 is the accuracy in the axial direction of the through hole 4 described above. When the bush portion 4a is formed simultaneously with drilling in this way, the position accuracy of the outer end surface of the pedal arm 2 of the bush portion 4a is increased to some extent without sacrificing productivity. Compared with the thickness of the through hole in the axial direction, the processing accuracy is still not high.

  Even if the shaft member 20 is directly inserted into the through hole 4 having a high processing accuracy and the retaining ring 21 is fitted into the circumferential groove 20b at the distal end of the insertion, the retaining ring 21 and the pedal arm 2 or the stepped portion 20a. A gap is created between the pedal arm 2 and the pedal arm 2. That is, the small diameter part formed in the front-end | tip part of the shaft member 20 of the 1st link member 18 is inserted in the through-hole 4 of the pedal arm 2, and the stop fitted by the level | step-difference part 20a and the circumferential groove 20b of the shaft member 20 is inserted. The shaft member 20 of the first link member 18 is attached to the pedal arm 2 (through hole 4) so that the pedal arm 2 is sandwiched between the wheel 21 and the distance between the stepped portion 20a and the retaining ring 21 and the through hole. Since there is a difference in the dimension in the axial direction of 4, a gap is formed and play occurs. In the present embodiment, as shown in FIG. 7 (a), a wavy washer 29 is interposed between the pedal arm 2 and the retaining ring 21, thereby allowing play between the two and allowing productivity and assemblability. The backlash between them (the difference between the gap between the stepped portion 20a and the retaining ring 21 and the axial dimension of the through hole 4) is adjusted by the corrugated washer 29 and absorbed. The axial height (thickness) of the corrugated washer 29 in the free state is larger than the difference between the distance between the stepped portion 20a and the retaining ring 21 and the axial dimension of the through hole 4, and the corrugated washer 29 is axially The height (thickness) in the axial direction when elastically deformed is smaller than the difference between the distance between the stepped portion 20a and the retaining ring 21 and the size in the axial direction of the through hole 4. Further, when the corrugated washer 29 is attached to the retaining ring 21 in this way, the corrugated washer 29 in front of the pedal arm 2 can be easily seen, and forgetting to attach the corrugated washer 29 can be suppressed during assembly. The corrugated washer 29 may be interposed between the stepped portion 20a of the shaft member 20 and the pedal arm 2 as shown in FIG. Also in this case, the backlash between the stepped portion 20a and the pedal arm 2 can be absorbed, and the corrugated washer 29 that is put on the outer periphery of the shaft member 20 is stable, and the assembling property is good.

  In the above-described embodiment, only the vehicle pedal device according to the present invention applied to the brake pedal device has been described in detail. However, the vehicle pedal device according to the present invention can be similarly applied to a clutch pedal device.

1 is a brake pedal device 2 is a pedal arm 3 is a pedal shaft 4 is a through hole 7 is a dash panel 8 is a pedal bracket 9 is a master cylinder 15 is a trigger 16 is a link mechanism 17 is a pin 18 is a first link member 19 is a second link Member 20 is a shaft member 21 is a retaining ring 23 is a column bracket 24 is a pin 29 is a corrugated washer

Claims (2)

  A pedal arm made of a hollow pipe member whose upper end is rotatably supported by the dash panel, a first link member rotatably attached to the pedal arm and connected to a push rod of the master cylinder, and the first link A shaft member provided on the member and inserted into a through hole of the pedal arm; a retaining ring attached to a distal end portion of the shaft member inserted into the pedal arm; and a retaining ring which is placed on an outer periphery of the shaft member; A pedal device for a vehicle, comprising a corrugated washer interposed between a pedal arm or a step formed on a shaft member and the pedal arm.   A pedal bracket provided at an intermediate portion of the first link member, a lower end portion of the first link member connected to a push rod of a master cylinder, and attached to the dash panel and interposed between the pedal arm and the pedal bracket; A pedal shaft for rotatably mounting the upper end portion of the pedal arm to the pedal bracket; a lower end portion is rotatably connected to the upper end portion of the first link member; and an upper end portion is detachably attached to the pedal shaft from the front of the vehicle A second link member and a trigger member attached to the pedal bracket and interposed between the second link member and the column bracket, the first link being more than a straight line connecting the shaft member and the pedal shaft. The pedal device for a vehicle according to claim 1, wherein a connection point between the link member and the second link member is disposed on the rear side of the vehicle.

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