JPS604016B2 - Foot-operated parking brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a foot-operated parking brake used in vehicles such as automobiles.

Conventionally, this type of parking brake generally has an operating section as shown in FIG. That is, the parking brake is activated via the cable 3 by depressing the parking brake pedal 2, which is pivotally mounted on a bracket 1 provided on the vehicle body, from the solid line position to the two-dot chain line position. In this state, even if the driver takes his or her foot off the parking brake pedal 2, the pawl 4 pivotally installed on the bracket 1 will not move due to the action of the turn spring 6 or the pawl 4 installed vertically between the lead rod 5 and the bracket 1. ,
It is maintained by engaging a ratchet 7 integrated with the parking brake pedal 2. To release the parking brake from this state, the release knob 5a at the tip of the release rod 5 is pulled against the return spring 6, and the pawl 4 is rotated to a position where it is released from the engagement position with the ratchet 7. As a result, the parking brake pedal 2 is connected to a return spring provided during the transmission of parking brake operating force, a turn spring 8 that is stretched between the bracket 1 and the parking brake pedal 2, and a turn spring 8 that is tensioned between the bracket 1 and the parking brake pedal 2.
The parking brake pedal 2 is returned from the two-dot chain line position to the solid line position and the parking brake can be released, and the parking brake pedal 2 collides with the bumper rubber 9 fixed to the bicycle racket and returns to its original position. However, in this conventional structure, when the parking brake is released, the parking brake pedal 2 violently collides with the bumper rubber 9, which causes an abnormal noise, and furthermore, the parking brake pedal 2 is repeatedly pressed due to the elasticity of the bumper rubber 9. The impact may be applied to the pedal 2, the bumper rubber 9, the parts that support them, the parking brake switch that responds to the pedal 2, etc., causing early damage to them. Furthermore, there have been many inconveniences such as the mud and water adhering to the parking brake pedal 2 being scattered. The present invention solves the problem that, in the case of the conventional structure, the above-mentioned inconvenience occurred because the elasticity of the bumper rubber absorbs the accelerated return rotation, which reaches its maximum speed near the original position of the parking brake pedal, and attempts to suppress the brake pedal. Instead of the bumper rubber used in the conventional structure, it has a specially configured stopper, that is, a pad that is pressed against the side of the parking brake pedal, and the friction between the two prevents the parking brake pedal from returning to its original position. All of the above-mentioned disadvantages of the conventional structure are solved by using a stopper to hold the motor at the original position at the end of the moving stroke.

Hereinafter, the present invention will be explained in detail with reference to the illustrated embodiments.

2 to 6 show an example of the construction of a foot-operated parking brake according to the present invention. In the present invention, a stopper 10 in place of a conventional bumper rubber is attached to a bracket 1 with a pin 11 as shown in FIG. As clearly shown in FIGS. 3 to 6, the stopper 10 includes a pair of pads 12 made of an elastic material such as rubber, and these pads are attached to individual substrates 13. Each board 13 is rotatably supported on a mounting plate 15 by a pin 14 with the pads 12 facing each other. When attaching the stopper 10 to the bracket 1, the screw I1 is inserted into the through hole 15a provided in the mounting plate 15. A plane 16 formed by the locus (hereinafter abbreviated as the pedal rolling plane 16).

) The stopper 10 is arranged so as to be symmetrical with respect to the plane.
The surface of the pad 12 is formed into an L-shape, and one surface 12a of the pad 12 forms a nearly right angle to the other surface 12M. Also, the fourth
As clearly shown in the figure and FIG. 6, a spring 17 is wound around the pin 14, and both ends of the spring 17 are engaged with the base plate 13 of the pad 12, so that the pad 12 is expanded as shown in FIG. The rotation is energized, and this rotation is limited by the bent green 15b of the mounting plate 15. 3-4, surface 1 of pad 12
Although 2a and 12b are made of the same material, they can of course be made of materials having different hardness and abrasion resistance. The foot-operated parking brake of the present invention having the above-described structure operates the parking brake by the same operation as the conventional structure described above, that is, by depressing the pedal 2, and by pressing the rear knob 5.
The parking brake can be released by pulling the button a, but during the return rotation of the pedal 2 from the two-dot silver line position in Figure 2 to the solid line position, which is performed when the parking brake is released,
At a position near the end of its stroke, the pedal 2 collides with the surface 12a of the pad 12, as shown in FIG.

After that, the return rotational force of the pedal 2 imitates the pad 12.
While rotating the pedal 2 around the pin 14 in the direction of the arrow a against the force 7, the pedal 2 is further rotated back. Immediately thereafter, the surfaces 12b of both pads 12 begin to come into contact with both side surfaces 2a of the pedal 2 (as shown in FIG. 5), and as the pedal 2 further rotates, the pad 1
2 applies even stronger pressure to the pedal 2 from both sides (as shown in FIG. 6). Therefore, the return rotation of the pedal 2 is caused by the pad 12
Due to the friction between the pedal 2 and the pedal 2, the brake is braked without causing an impact, and the brake is finally returned to the state shown in FIG. That is,
When the pedal 2 reaches the state shown in Fig. 6 and stops, the inertial force associated with its return rotation disappears, so the force acting on the pedal 2 in the return rotation direction (mainly the spring force of the pedal return spring 8 and the parking The sum of the spring force of the return spring in the brake operation force transmission system returns to the state shown in FIG. 5 in which the spring force of the spring 17 is balanced with the spring force of the spring 17, and this state is maintained. Next, when operating the parking brake, when the pedal 2 is depressed from the solid line position shown in FIG. 2, the pedal 2 is displaced from the position shown in FIG. 5 to the position shown in FIG. The pedal 2 is then rotated to a position where it contacts the bent edge 15b of the mounting plate 15, and preparations for receiving the pedal 2, which is then rotated back, are completed as described above. Note that the pedal force when starting to press the pedal 2 from the state shown in FIG. 5 does not increase in practical terms because the pad 12 is in contact with the side surface of the pedal 2 or is only applying very light pressure, as described above. It can be considered as Figures 7 to 10
7 shows another embodiment of the foot-operated parking brake of the present invention. In this embodiment, a stopper 10, which is used in place of the conventional bumper rubber like the stopper described above, is attached to the bracket with screws 11' as shown in FIG.

As shown in FIGS. 8 to 11, the stopper 10' is similar to the stopper 1 in the example described above with reference to FIGS. 2 to 6.
0, and corresponding parts in the drawings are indicated by the same reference numerals with dashes. 13a' and rotates the pad 12' in its expanding direction.
That is, the shape of the free state of the spring 17 is determined so that the free ends far from the pivot pin 14' are urged to rotate in a direction away from each other, and this rotation stops at the position shown in FIG. or,
Surface 1 of the pad 12' facing the rolling surface 16 of the pedal 2
2'c increases the pedal rotation plane 1 by gradually increasing the thickness of the pad 12' toward the return rotation direction of the pedal 2.
The tapered surface approaches 6 as shown in FIG.

The foot-operated parking brake of this example configured as described above can also be operated in the same manner as the conventional structure described above, that is, by pressing the pedal 2.
The parking brake can be activated by depressing the button, and can be released by pulling the release knob 5a, but during the return rotation of the pedal 2 from the imaginary line position in FIG. 7 to the solid line position, which is performed when the parking brake is released. , the pedal 2 begins to collide with a portion of the tapered surface 12'o of the pad 12' at a position close to the end of the stroke, as shown in FIG. Thereafter, the return rotational force of the pedal 2 causes the pedal 2 to bite into the tapered surface 12'o of the pad 12', and rotates the pad 12' in the direction of arrow b against the spring 17', causing the pedal 2 to further rotate. Rotate back. During the return rotation of the pedal 2, as the pads 12' rotate, the tapered surfaces 12'c of the pads 12' come into contact with both side surfaces 2a of the pedal 2 over a wide area, thereby squeezing the pedal 2 from both sides. Therefore, pedal 2
Due to the friction between the pad 12' and the pedal 2, the spring 1
The state shown in FIG. 10 is reached without being affected by the recoil caused by the elasticity of 7'. After that, when the pedal 2 stops, the inertial force associated with its return rotation disappears, so that the state shown in FIG. 11 in which the force acting on the pedal 2 in the return rotation direction is balanced with the spring force of the spring 17' is maintained. dripping Next, when the parking brake is actuated, when the pedal 2 is depressed from the position shown by the solid line in FIG. 7, the pedal 2 is displaced from the position shown in FIG. 11 to the position shown in FIG. 9. At this time, the pad 12' is moved by the spring force of the spring 17' as shown in FIG.
The pedal 2 is rotated to a position determined by the free state shape of the pedal 2, and preparations for receiving the pedal 2, which is then rotated back, are completed as described above. It can be seen that in this embodiment as well, the pedaling force at the beginning of the pedal pedal does not increase as much as in the embodiments shown in FIGS. 2 to 6. In each of the embodiments of the present invention described above, the pads 12, 12' are arranged in pairs on both sides of the pedal 2, but the pads 12, 12' do not necessarily have to be arranged in pairs. Instead, one pad may be placed on one side of the pedal 2.

However, in this case, the pressing force on the side surface of the pedal by the pad is only applied from one side of the pedal, which is disadvantageous in terms of the strength of the pedal and its supporting parts.Preferably, the pads are set in pairs as shown in the figure, and the pedal It is preferable to arrange them symmetrically with respect to the rotation plane. Furthermore, in the embodiments shown in FIGS. 7 to 11, if the pad 12' can be sufficiently thick, the substrate 13' is formed into a tapered shape, and the pad 12' has a uniform thickness. You can also do that. Furthermore, in the embodiments shown in FIGS. 8 to 11, a small protrusion 12d may be provided at the tip of the pad as shown in FIG. 12 in order to hasten the time for the tip of the pad to contact the side surface of the pedal. In this case, the pad 12' In this order, they come into contact with the side surface of the pedal 2 as shown in FIGS. 13 and 14. Thus, the foot-operated parking brake of the present invention is configured to press the pedal 2 at a position near the end of the return rotation stroke and receive it by friction using the specially constructed stoppers 10 and 10' as described above, which is different from the conventional structure. There is no vibration that occurs when the pedal 2 rotates back, which can cause abnormal noise, early damage to the pedal 2, its supporting parts, the parking brake switch, etc., and even damage the pedal 2. It is possible to avoid all inconveniences such as splashing of mud and water attached to the surface.

In particular, in the embodiment of FIGS. 7 to 11, pad 1
The biting of the pedal 2 into the tapered surface 12'c of the pedal 2' plays a part of the function of catching the pedal 2, so even if the rotational stroke of the pedal 2 is small, a large frictional force is applied to the pedal due to a kind of sliding effect. 2 and pad 12' and is useful.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing the operating section of a conventional foot-operated parking brake, FIG. 2 is a longitudinal side view similar to FIG. 1 showing the foot-operated parking brake of the present invention, and FIG. FIG. 4 is a sectional view taken along the line A-A in FIG. 2 used to explain the function of the parking brake of the present invention, and FIG.
6 is a sectional view for explaining the function similar to that in FIG. 4, FIG. 7 is a longitudinal side view similar to FIG. 2 showing another example of the present invention, and FIG. 8 is a sectional view similar to FIG. 7. FIG. 9 is a sectional view taken along line B-B in FIG. 7 used to explain the operation of the parking brake shown in FIG. 7, and FIG. 10 is a sectional view taken along line B-B in FIG. 6. , FIG. 11 is a sectional view for explaining the function similar to FIG. 9, FIG. 12 is a partial sectional view showing a modification of the pad in FIGS. 8 to 11, and FIGS. 13 and 14 are the same. It is an action explanatory diagram. 1...Bracket, 2...Parking brake pedal, 3...
Cable, 4...claw, 5a...release knob, 6...return spring, 7...ratchet, 8...return spring, 10, 10'...stopper, 11, 11'...screw, 1
2, 12'... Pad, 12a, 12b, 12c... Pad surface, 13, 13'... Board, 14, 14'... Pin, 15, 15'... Mounting plate, 16... Pedal rotation Dynamic plane, 17, 17'...spring. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14

Claims (1)

[Scope of Claims] 1. The parking brake is actuated by depressing a parking brake pedal rotatably supported by the vehicle body, and the parking brake is maintained in the operating state by locking the parking brake pedal with a lock mechanism. In a foot-operated parking brake in which the parking brake is deactivated while the parking brake pedal is rotated back by releasing the locking mechanism,
A stopper disposed on at least one side of the rotational plane of the parking brake pedal and having a rotatable pad is provided on the vehicle body, and the stopper is provided with a stopper located within the terminal portion of the return rotational locus of the parking brake pedal and configured to stop the parking brake pedal. The first pad rotates the entire pad due to collision with the brake pedal.
A foot-operated parking rake, characterized in that it is provided with a second part that comes into frictional contact with a side surface along a rotational plane of a parking brake pedal by this rotation. 2. The first part and the second part have a tapered surface on the side closer to the parking brake pedal so as to approach the side surface of the parking brake pedal as it goes in the direction of return rotation of the parking brake pedal. Foot-operated parking brake described in scope 1. 3. The foot-operated parking brake according to claim 1 or 2, wherein the pads are arranged in sets of two, and these pads are arranged symmetrically with respect to the rotational plane of the parking brake pedal.