JPS62194960A - Stepping-in type parking brake operating device - Google Patents

Abstract

PURPOSE:To obtain the compact device by positioning a pedal leg at a restoration position and the max. stepping-in position by a single stopper and attenuating the restoration operation speed of the pedal leg by the stopper, thus reducing the number of parts for the device. CONSTITUTION:A pedal leg 3 is rotatably supported onto a pedal supporting bracket 1 fixed onto a chassis, and turned in a prescribed stroke ranging from a restoration position to the max. stepping position. A return spring 7 for urging the pedal leg 3 in the direction of turn to the restoration position is installed, and a restoration suppressing means for suppressing the turn of the pedal leg 3 against the urging force is constituted of a ratchet teeth 5 and a ratchet hook 6. Further, the parking brake can be released by releasing the restoration suppressing means by a releasing cable 10. The pedal leg 3 is positioned at the restoration position and the max. stepping-in position by the stopper 11 of the positioning member, and the operation speed in restoration is attenuated by the frictional engagement with the pedal leg 3 in the range between the both positions.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a foot-operated parking brake actuation device.

(Prior Art) Conventionally, such a foot-operated parking brake actuation device is disclosed in, for example, Japanese Utility Model Application Publication No. 59-22049. In this conventional foot-operated parking brake actuation device, the brake pedal is supported by a bracket fixed to the vehicle body so as to be rotatable during a predetermined stroke from the return position to the maximum depression position. A stopper is provided for positioning and stopping at the return position. Furthermore, a damping member is provided that frictionally engages with the brake pedal to attenuate the return operation speed, and the elastic force of the return spring alleviates the impact force when the occupant is hit by the sudden return operation of the brake pedal.
In addition, the impact sound generated when the brake pedal hits the stopper at the return position is reduced.

(Problems to be Solved by the Invention) However, in such a conventional foot-operated parking brake actuating device, a stopper that positions and stops the brake pedal at the return position, and a damping member that damps the return 4M operation speed. However, since they are both located at separate locations on the bracket, the number of parts increases, and at the same time,
In order to secure a space for the two members to fit together, the size of the placket inevitably increases, leading to a rise in manufacturing costs.

The present invention has been made to solve these conventional problems, and an object of the present invention is to provide a foot-operated parking brake actuation device that reduces the number of parts and makes the device more compact.

(Means for Solving the Problems) In order to solve the above problems and achieve the purpose, the foot-operated parking brake actuating device according to the present invention includes a placket fixed to a vehicle body, and a rotatable plate attached to the placket. a pedal leg that is supported by and rotates during a predetermined stroke from a return position to a maximum depression position; a return spring that biases the pedal leg in a direction to rotate the pedal leg toward the return position; and a biasing force of the return spring. return preventing means for preventing the pedal leg from rotating toward the return position against the
a brake release means for releasing the parking brake by releasing the blocking action of the return 1 stopping means; and a brake release means provided on the placket for positioning the pedal leg at its return position and the maximum depression position and extending between the two positions. and a positioning member that frictionally engages with the pedal leg to attenuate the operating speed upon return.

(Embodiment) Hereinafter, an embodiment of the foot-operated parking brake actuating device according to the present invention will be described with reference to the drawings.

In Fig. 1, 1 is a pedal support bracket fixed to the interior dash panel 2, 3 is a support shaft 4 attached to the placket 1.
The pedal leg 3 is swingably supported through the pedal leg 3, and the pedal leg 3 is provided with a depression part 3b, which is directly depressed by an occupant, at the tip of an arm part 3a. Also,
The pedal leg 3 has ratchet teeth 5 on a concentric circle of the support shaft 4.
is formed, and the ratchet pawl 6 meshes with the ratchet teeth 5 to permit clockwise rotation of the pedal leg 3 about the support shaft 4 and to prevent counterclockwise rotation. It has become. The ratchet teeth 5 and the ratchet pawl 6, which are the one-way return prevention means,
The pedal leg 3 is prevented from returning to the normal (return) position from the maximum depression position shown by the two-dot chain line in the figure. Reference numeral 7 denotes a return spring that biases the pedal leg 3 in a counterclockwise direction around the support shaft 4 toward the return position. That is, when the pedal leg 3 is stepped on by an occupant via its depression portion 3b, it rotates clockwise against the elastic biasing force of the return spring 7, and the brake unit for the wheel is activated via the actuation cable 9. (not shown). The ratchet pawl 6 meshing with the ratchet teeth 5 prevents it from returning from the rotated depressed position.

The ratchet pawl 6 is biased clockwise around the support shaft 6a by the elastic force of the biasing spring 8, and meshes with the ratchet teeth 5 of the pedal leg 3. Further, one end of a release cable 10, which is a constituent member of a brake release means described below, is locked to the ratchet teeth 6, and the other end of the release cable 10 is connected to a grip part (not shown) that is pulled by an occupant. has been done. That is, from a state in which the pedal leg 3 is prevented from returning toward the return position from the maximum depression position during parking braking by the ratchet teeth 5 and the ratchet pawl 6, the release cable 1o is released by the occupant's manual operation of the grip portion. When the pedal is pulled to the right in the figure, the ratchet pawl 6 is forcibly disengaged from the ratchet teeth 5, the pedal leg 3 is released from its return device action at its maximum depression position, and the return spring 7 is released. It is designed to return to the return position using elastic force.

On the other hand, the pedal leg 3 further includes a damping friction surface portion 30.
0 is formed with a required curvature, and this damping friction surface portion 3
A rubber stopper 11, which is a positioning member, is rotatably provided on the bracket 1 so as to be in constant contact along the co. The damping friction surface portion 3co includes a return position portion 3c,
and the full stroke (maximum depression) position 3C2.

Next, the effect will be explained.

When the occupant depresses the depressing portion 3b of the pedal leg 3, the pedal leg 3 rotates, for example, to the full stroke position shown by the two-dot chain line in the figure, and the pedal leg 3 rotates to the full stroke position 3cz.
When the actuating cable 9 is in contact with the stopper 11,
When the vehicle is pulled, the braking units on the wheels are activated to maintain the vehicle in a parked state. At this time, the ratchet pawl 6 is engaged with the ratchet teeth 5 on the pedal leg 3 side, and the pedal leg 3 will rotate counterclockwise around the support shaft 4 from the full stroke position 3c2 to return to the return position. This prevents the operation. As a result, when the release cable 10 is pulled by the occupant's manual pulling operation on the gripping portion, the engagement of the ratchet pawl with the ratchet teeth 5 is forcibly released, and the pedal leg 3 is moved to the return spring 7.
The elastic force causes the rotation to return counterclockwise toward the return position shown by the solid line, and the return position portion 3c+ is located at the stopper 1.
1 and is positioned at that position. The brake unit of the wheel is then deactivated via the activation cable 9. Further, when the rotation restoring force of the pedal leg 3 is j1, the damping friction surface portion 3C0 of the pedal leg 3 and the stopper 11
The speed at which the pedal leg 3 returns at a rapid speed due to the elastic force of the return spring 7 is attenuated by the contact friction force in the section from the full stroke position 3cz to the return position 3c+. let

Further, FIG. 2 shows a second embodiment of the present invention, and in this second embodiment, the damping friction surface 3co of the above-mentioned "first embodiment" is
is provided at a different part of the pedal leg 3, and in this case as well, the same effect as in the first embodiment can be obtained.

(Effects of the Invention) As can be understood from the above, the foot-operated parking brake actuation device according to the present invention allows the pedal leg to be positioned at its return position and maximum depression position by a single stopper (positioning member). Since the stopper is configured to attenuate the return movement speed of the pedal leg, it is no longer necessary to separately install the positioning member and the damping member on the placket as in the past, reducing the number of parts. The device can be made more compact due to the reduction in manufacturing costs and the miniaturization of the placket.

[Brief explanation of drawings]

FIG. 1 is a side view of a first embodiment of a foot-operated parking brake actuation device according to the present invention, and FIG. 2 is a side view of a second embodiment. 1...Pedal support bracket 1-13...
・Pedal leg, 3a... Arm part, 3b... Depressing part, 3Co... Damping friction surface part, 3c,... Return position part, 3C2...・Full stroke position part, 4...
... Swing shaft, 7 ... Return spring, 9 ... Operation cable, IO ... Release cable (brake release means),
11... Stopper (positioning member).

Claims (1)

[Claims] A bracket fixed to a vehicle body, a pedal leg that is rotatably supported by the bracket and rotates during a predetermined stroke from a return position to a maximum depression position, and a direction in which the pedal leg is rotated toward the return position. a return spring that biases the pedal leg; a return prevention means that prevents the pedal leg from rotating toward the return position against the biasing force of the return spring; and a return prevention means that releases the prevention action of the return prevention means. a brake release means for releasing a parking brake; and a brake release means provided on the bracket for positioning the pedal leg at its return position and a maximum depression position and frictionally engaging the pedal leg between both positions to release the parking brake at the time of return. A foot-operated parking brake actuating device, comprising: a positioning member that attenuates operating speed.