JPH04232158A - Foot type parking brake - Google Patents

Abstract

PURPOSE:To prevent abnormal noise from producing, facilitate assembly, and downsize to reduce the weight of a brake. CONSTITUTION:In a brake device in which a parking brake is operated by rotating a foot type brake pedal 3 mounted on a shaft, a coil spring 4 is fitted closely onto a core metal at the shaft part of the brake pedal, and the one end of the coil spring is engaged to a base plate and the other is made in contact with a protrusion formed on the brake pedal 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foot-operated parking brake for operating and releasing the parking brake of a vehicle such as an automobile.

0002

2. Description of the Related Art In recent years, cars equipped with automatic transmissions have adopted foot-operated parking brakes in place of hand-operated parking brakes. FIG. 7 shows a plan view of a conventional example of such a foot-operated parking brake. Two boards 21, which are attached with the brake mechanism part sandwiched between them, are fixed to the driver's seat part of the vehicle body 22 with bolts. There is a support shaft 2 in the board 21.
3 is provided, and a foot-operated brake pedal 2 is mounted on the support shaft 23.
4 is rotatably supported, and the brake pedal 24
The lower part of the board is slightly bent toward the driver's seat and extends downward from the board 21. A connection plate 25 is attached to the upper end of the brake pedal 24 so as to rotate integrally therewith, and a remote control cable 26 is attached to the connection plate 25.
is connected to a parking brake (not shown). Further, ratchet teeth 27 are formed on the upper edge of the connection plate 25, and a lock plate 28 meshes with the ratchet teeth 27. lock plate 2
8 is rotatably attached to the base plate 21 by a pin 29 and biased by a spring 30 in the direction of meshing with the ratchet teeth 27 . Therefore, the brake pedal 24
rotates in one direction (in the illustrated example, in the direction of the arrow), but rotation in the opposite direction is caused by the ratchet teeth 27 and the lock plate 28.
It is locked by meshing with. Reference numeral 31 denotes a release lever for releasing this lock, which is slidably attached to the base plate 21 and has a roller 33 attached to its left end, which rolls into contact with the lock plate 28. Therefore, when the release lever 31 is pulled forward (to the right), the roller 33 rotates the lock plate 28 in the anti-meshing direction, so the brake pedal 24 can be rotated in the opposite direction, and the brake pedal 24 is returned to its original position. It is becoming more and more popular. This return is automatically performed by the spring force of a return spring (not shown), but if this return occurs quickly, it will cause a shock to the driver's legs, so an oil damper 32 is installed to reduce the rotational speed at the time of return. It is provided. This oil damper 32 is connected to the circuit board 21 and the brake pedal 2.
4, and the cylinder 32a is connected to the substrate 2.
1, and the piston rod 32b is pivotally supported to the brake pedal 24. Therefore, when the brake pedal 24 is returned to its original position, the piston rod is extended to reduce its speed. In FIG. 7, reference numeral 35 indicates a tension spring for returning the release lever 31, so that the release lever 31 automatically returns after being operated.

0003

However, in the conventional device, since the oil damper 32 is used to reduce the rotational speed of the brake pedal 24, it has the following problems. ■ In order to ensure the operation of the oil damper, the piston rod 32b of the oil damper 32 must be connected to the brake pedal 24.
Since the mounting position and direction are limited, assembly is troublesome, and the degree of freedom in setting is extremely limited. ■ A space is required to ensure the expansion and contraction movement of the oil damper 32, which increases the size of the entire brake device. ■
The oil damper 32 is heavy because metal is used in areas where strength is required for the operating mechanism. ■
When the cylinder rod 32b expands and contracts, the cylinder 3
Since oil flows within 2a, it generates abnormal noise during operation. The present invention solves the problems of such conventional devices, and
The purpose of the present invention is to provide a foot-operated parking brake that can be assembled, reduced in size, and reduced in weight.

0004

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a brake device in which a parking brake is operated by rotating a foot-operated brake pedal attached to a support shaft. It is characterized in that a coil spring is tightly fitted into the core bar at the pivot point, one end of the coil spring is locked to the base plate, and the other end is in contact with a convex portion formed on the brake pedal.

[0005]

[Operation] When the brake pedal rotates to apply the parking brake, the coil spring expands in diameter, and when the brake pedal rotates back to release the parking brake, the coil spring gradually contracts in diameter. As the diameter of the coil spring gradually decreases, the cylindrical portion of the brake pedal is gradually tightened, so that the return speed of the brake pedal is relaxed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is a plan view showing an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the line A-A, FIG. 3 is a front view, and FIG. 4 is a side view. Reference numeral 1 indicates a board fixed to the vehicle body, and a support shaft 2 is fixed to this board 1. A cylindrical portion 3a at the upper end of the brake pedal 3 is pivotally supported by the support shaft 2, and is attached to rotate around the support shaft 2. A remote control cable 5 that connects to a parking brake (not shown) is attached to the upper end of the brake pedal 3, and the parking brake is operated by rotating the brake pedal 3. When the button is depressed, the release is returned by a return spring (not shown).

A coil spring 4 is tightly fitted into the outer periphery of the cylindrical portion 3a of the brake pedal 3, and a hook portion 4a at one end of the coil spring 4 is connected to the base plate 1.
The other end 4b is in contact with a pin 7 fixed to the brake pedal 3.

Further, ratchet teeth 8 are formed on one side edge of the upper end of the brake pedal 3, and a lock plate 9 that meshes with the ratchet teeth 8 is attached to the base plate 1 by a pivot shaft 10. This lock plate 9 is biased by a spring 11 in the direction of engagement with the ratchet teeth 8 to lock the return of the brake pedal 3 by a return spring (not shown). This lock is released by the release lever 12.

Since the configuration of this embodiment is as described above,
When the brake pedal 3 is depressed and the brake pedal 3 is rotated counterclockwise (in the direction of the arrow) in FIG. Since the remote control cable 5 connected to (not shown) is also pulled, the brake is also applied. When the foot is released while the brake is applied, the lock plate 9 engages with the ratchet teeth 8 and the return is locked (the state shown in FIG. 5). Next, to release the brake, pull the lock plate 9 using the release lever 12 to separate it from the ratchet teeth 8 (state shown in Figure 6).
Then, the brake pedal 3 returns to its original position by the force of a return spring (not shown). At this time, the coil spring 4 is
As the brake pedal 3 returns, the diameter gradually decreases from the expanded state. Therefore, the cylindrical portion 3a of the brake pedal 3 is
Since the coil spring 4 is tightened by gradually reducing its diameter, the return (rotational speed) of the brake pedal 3 is not sudden but moderate, and no shock is applied to the driver's feet. In the end, the coil spring completely wraps around the cylindrical part, so it also becomes a stopper for the brake pedal. Of course, the end portion 4b of the coil spring 4 presses the pin 7 during diameter reduction, so it also serves as a return spring. In this embodiment, the coil spring 4 is directly inserted into the cylindrical portion 3a of the brake pedal 3, but a core metal is fixed to the outer peripheral surface of the cylindrical portion 3a, and the coil spring 4 is inserted into the core metal. You can also insert it. This has the advantage that the brake pedal 3 and the cylindrical portion 3a can be molded from synthetic resin, which helps reduce the overall size and weight.

0010

[Effects of the Invention] As described above, the present invention has a structure in which the rotational speed when the brake pedal returns is relaxed by gradually tightening the coil spring when the diameter of the coil spring is reduced, so that it can be assembled regardless of directionality. It is easy to assemble,
It also becomes possible to reduce the weight and size. Furthermore, there is no generation of abnormal noise during operation, and quiet operation is possible.

[Brief explanation of the drawing]

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

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a front view showing an embodiment of the present invention.

FIG. 4 is a side view showing an embodiment of the present invention.

FIG. 5 is a plan view showing the operating state of the embodiment.

FIG. 6 is a plan view showing another operating state of the embodiment.

FIG. 7 is a plan view showing a conventional example.

[Explanation of symbols]

1 Board 2 Support shaft 3 Brake pedal 3a Brake pedal cylinder part 4 Coil spring 7 Pin 8 Ratchet gear 9 Lock plate

Claims (1)

[Claims] 1. A brake device that operates a parking brake by rotating a foot-operated brake pedal attached to a support shaft, wherein a coil spring is installed in close contact with a core metal at a pivot point of the brake pedal. A foot-operated parking brake characterized in that one end of the coil spring is engaged with a base plate and the other end is brought into contact with a convex portion formed on a brake pedal.