JPS595460B2 - Foot-operated parking brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foot-operated parking brake device used in an automobile, and more particularly to a foot-operated parking brake device in which the parking brake pedal is slowly returned to its original position.

In the foot-operated parking brake devices that are already in practical use, when the parking brake is released, the return speed of the parking brake pedal is fast, and there is a problem that a loud noise is produced when the parking brake pedal collides with the rubber block-shaped stopper.

This noise can be reduced by lowering the hardness of the stopper, but the amount of deformation of the stopper due to the return rotational force of the parking brake pedal increases and the amount of overstroke of the parking brake pedal increases, making it difficult to determine whether the parking brake pedal is returning or not. An excessive load is applied to the warning switch that detects the warning switch, causing damage to the warning switch.

The present invention solves the above-mentioned problem by adding a simple brake mechanism that operates only when the parking brake pedal is rotated back.The present invention will be described below with reference to the drawings.

In the embodiment shown in FIGS. 1 and 2, a bracket 1 is fixed to the vehicle body, and a parking brake pedal 2 is pivotally supported on the bracket 1 by a shaft 3.

The parking brake pedal 2 is connected to a parking brake control wire 4, and when the parking brake pedal 2 is depressed, the control wire 4 is connected as the parking brake pedal 2 rotates clockwise from the return position shown in the first diagram.
is pulled upward and the parking brake is applied.

A ratchet mechanism 5 is provided between the parking brake pedal 2 and the bracket 1 to automatically maintain the applied state of the parking brake.

This ratchet mechanism 5 includes a toothed plate 6 fixed to the parking brake pedal 2, a pawl 8 pivotally connected to the bracket 1 with a pin 7, and a spring 9 that biases the pawl 8 to rotate so as to engage the toothed plate 6. When the parking brake pedal 2 rotates clockwise in Fig. 1, the pawl 8
The engagement with the toothed plate 6 shifts, and the rotated position of the parking brake pedal 2 is automatically maintained.

In order to rotate the pawl 8 and separate it from the tooth plate 6, use Kl/
A bar 10 is pivotally attached to the bracket 1 with a pin 11.

This lever 10 has a bent portion 12 that contacts the pawl 8 when rotated counterclockwise to rotate the pawl 8 counterclockwise, and is pivoted to a manual lever 13 at its lower end. .

Therefore, when the parking brake is applied, the manual lever 13
When pulled to the right, the pawl 8 separates from the tooth plate 6, and as the parking brake control wire 4 returns with its own restoring force, the parking brake pedal 2 returns and rotates counterclockwise, releasing the parking brake. do.

At this time, a brake mechanism 15 is provided to suppress the return rotation speed of the parking brake pedal 2 to reduce the impact when the parking brake pedal 2 collides with the stopper 14 fixed to the bracket 1. .

The brake mechanism 15 includes a rod 16 extending on the side of the parking brake pedal 2 in the direction of rotation of the parking brake pedal 2.

This rod 16 is fixed to the bracket 1 at both ends thereof, and is curved in an arc shape about the shaft 13.

Brake element 17 arranged on the side surface of parking brake pedal 2
has a flat plate part 17a in contact with the side surface of the parking brake pedal 2 and a flat plate part 17b perpendicular to the flat plate part 17a, and is pivotally connected to the parking brake pedal 2 by a pin 18 at the lower end of the flat plate part 17a.

The distance between the pin 18 and the shaft 13 is smaller than the distance between the shaft 13 and the rod 16, and the flat plate portion 17b of the brake element 17 is provided with a hole 19 through which the rod 16 loosely passes.

The torsion spring 20 has one end inserted and locked into the hole 21 of the parking brake pedal 2, and the other end inserted into the brake brake 1.
7, and urges the brake 17 to rotate counterclockwise around the pin 18.

The brake mechanism 15 having such a configuration applies a brake only to the return rotation of the parking brake pedal 2.

That is, when the parking brake pedal 2 is stopped at the returned position, the brake element 17 is tilted by the spring 20 until the edge of the hole 19 comes into contact with the rod 16.

When the parking brake pedal 2 is depressed, the friction at the contact point between the brake element 17 and the rod 16 acts to rotate the brake element 17 clockwise around the pin 18.

This clockwise rotation of the brake element 17 results in the release of the frictional engagement between the rod 16 and the brake element 17, so that no braking action occurs, whereas the parking brake pedal 2 rotates back toward the return position. When moving, the frictional force between the rod 16 and the brake element 17 causes the brake element 17 to rotate counterclockwise around the pin 1B, and a predetermined frictional force is generated between the brake element 1T and the rod 16. This friction causes the parking brake pedal 2 to slowly rotate back.

In the modification shown in FIG. 3, when locking one end of the spring 20 to the parking brake pedal 2, the parking brake pedal 2
A bolt 23 threadedly engaged with a bracket 22 fixed to the
One end of the spring 20 is locked to the spring 20. In this way, the mounting load of the spring 20 can be adjusted arbitrarily, so malfunctions caused by dimensional tolerances of the brake mechanism components can be prevented by fixing the spring 20 after the brake mechanism is assembled. This problem can be solved by adjusting the mounting load in step 20.

Brake element 17 explained above. Instead of the pin 18 and the torsion spring 20, as shown in the fourth figure, a washer-like brake element 24 is loosely fitted onto the rod 16, and a support member is fixed to the side surface of the parking brake pedal 2 and supports the brake element 24 in a tiltable manner. 2
5 and the compression coil spring 26 stretched between the support member 25 and the brake element 24 can also provide the braking action as described above.

As shown above, in the present invention, the brake is applied to the return rotation of the parking brake pedal to slowly return the parking brake pedal, so the impact when the parking brake pedal collides with the stopper is reduced. It can solve problems such as sound.

The structure of the brake mechanism that applies a brake to the return rotation of the parking brake pedal is very simple, and has advantages such as not causing a large increase in cost.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is an enlarged view of essential parts, FIG. 3 is a diagram showing a modification, and FIG. 4 is a diagram showing another embodiment. 1 nib bracket, 2: parking flake pedal, 5: ratchet mechanism, 13: manual lever, 15 nib brake mechanism, 16:
Rods, 17, 24: Brake, 20° 26: Spring.

Claims (1)

[Claims] 1 A bracket fixed to the vehicle body, a parking brake pedal rotatably supported by the bracket and connected to the parking brake control wire, and the bracket and the parking brake to automatically hold the parking brake pedal in the depressed position. In a foot-operated parking brake device equipped with a ratchet mechanism provided between the pedal and a manual lever that releases a pole of the ratchet mechanism, the side of the parking brake pedal is connected to a ridge in the direction of rotation of the car brake pedal. A rod extending from the parking brake pedal is fixed to the bracket, the rod is curved like an arc around the center of rotation of the parking brake pedal, and the parking brake pedal has a hole through which the rod loosely passes through. The brake element is attached so as to be tiltable in the direction of the turning force of the parking brake pedal, and a spring is attached to bias the brake element so as to tilt the brake element, so that the brake element frictionally engages with the rod when the parking brake pedal is rotated back. A foot-operated parking brake device characterized in that the parking brake pedal returns slowly.