JP2529193Y2 - Parking brake device equalizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Industrial Field of the Invention The present invention relates to an equalizer for a parking brake device.

b. Conventional technology In a parking brake device, the operating force of a manual lever is distributed and transmitted to brake levers of left and right wheels via an equalizer.

3 to 5 show an equalizer of such a brake device.

In the illustrated equalizer 1, one operating side cable 2
And two brake side cables 3 and 4 are connected via a relay plate 5.

One end of the operation-side cable 2 is inserted into the relay plate 5, and is engaged in the middle of the relay plate 5 by a locking knot 2 a formed at the end, and the brake-side cables 3 and 4 have one end thereof. The portions are locked at both ends of the relay plate 5 by pins 3a, 4a and the like. A tension spring 7 is stretched between the relay plate 5 and the brake side wall 6a of the casing 6, and the relay plate 5 is urged by the spring 7 in the direction of the brake shoe side wall 6a of the casing 6.

On the other hand, the other ends of the brake-side cables 3 and 4 are connected to brake levers 8 and 9 of the left and right wheels, and springs 10 and 11 are provided at the other ends thereof, so that the brake
8, 9 are urged in the brake release direction. The other end of the operation side cable 2 is connected to a manual lever 12.

In the parking device provided with such an equalizer 1, when the manual lever 12 is pulled up, the operation side cable 2 is pulled leftward in FIG. Accordingly, the relay plate 5 is moved to the left via the locking knot 2a, and the brake-side cables 3, 4 are also pulled to the left via the relay plate 5 and the pins 3a, 4a. Therefore, the brake levers 8 and 9 are operated, whereby the brake shoes are operated and the braking action is performed.

c. Problems to be solved by the invention By the way, the operation side cable 2 and the relay plate 5
The locking knots 2a are linked to each other by abutting against the relay plate 5.

Therefore, when the manual lever 12 is quickly returned to the original position, as shown in FIG. 5, the return speed of the relay plate 5 becomes slower than the return speed of the operation side cable 2, and a time lag occurs in the brake release operation. Is generated.

In order to solve this problem, the operating side cable 2 may be connected to the relay plate 5 so as to be restrained. However, in order to connect in this manner, the connecting structure becomes complicated or the connecting operation becomes complicated. Become.

Therefore, an object of the present invention is to provide an equalizer of a parking brake device that can transmit an operating force at the time of releasing a brake to a brake lever with almost no time lag, and that has a simple structure and easy assembly work. .

d. Means for solving the problem In the equalizer of the parking brake device of the present invention,
The ends of one operating-side cable connected to the manual lever and the ends of two brake-side cables connected to the brake shoe are separated from the opposing manual lever side wall and brake shoe side wall in the casing. And the brake-side cables are arranged in parallel with the operation-side cable in the casing, and the end of the operation-side cable is inserted into the intermediate portion of the relay plate. A locking knot is formed at the portion, the cable is engaged with the relay plate, and ends of the brake-side cable are locked to both ends of the relay plate via pins, respectively, and a spring is further connected to the relay plate. Disposed between the plate and the casing to urge the relay plate toward the brake shoe side wall of the casing. In the equalizer of the parking brake device, the spring is formed in a substantially U-shape as a whole, has hooks at both ends to be locked to a wall of the casing, and is engaged with a locking knot of the operation cable at the center. A first recess that engages with the pin on both sides of the first recess, and a spring having a coil portion between the second recess and the hook. Connect the spring with the locking knot,
By disposing the pin and the casing on the wall, the returning operation of the operating cable at the time of releasing the brake is transmitted to the brake cable via the spring.

e. Operation With the equalizer of the parking brake device of the present invention,
When the manual lever is quickly returned upon release of the brake, the return force of the manual lever is transmitted to each brake-side cable via the operating-side cable, the locking knot of the cable, and the center of the spring.

f. Embodiment FIG. 1 shows an equalizer of the parking brake device according to the present invention, and FIG. 2 shows a spring employed in the equalizer.

The casing 21 of the equalizer 20 has a rectangular parallelepiped shape. Then, opposed end walls 21a,
One of the operation side cables 22 is inserted into one of the manual lever side walls 21a, and the other of the two brake side cables 23 is inserted into the other brake shoe side wall 21b. Cables 22, 23 in these casings 21
Are arranged parallel to each other, and the cable 22 is located between the two cables 23. The cable 22 passes through the center of the relay plate 24, and a locking knot 22a formed at the end of the cable 22 contacts the one surface 24a of the relay plate 24. Are connected via

On the other hand, the spring 26 provided in the casing 21
As shown in FIG. 2, the whole is formed in a substantially U-shape, and hooks 26a are formed at both ends. This spring 26
Has a first concave portion 26b that opens to one side at the center, and has second concave portions 26c and 26c that open to the other side on both sides thereof.
Further, the spring 26 has a second concave portion 26c and a hook 26a.
And a coil portion 26d. As shown in FIG. 1, the spring 26 has a first concave portion 26b.
Into the locking knot 22a of the cable 22, and the second recess 26
After fitting c and 26c to pins 25 and 25, both hooks 26a and 26a
Are disposed in the casing 21 by engaging with both side walls 21c, 21c of the casing 21.

The spring 26 arranged in this manner urges the relay plate 24 to the right in FIG. A brake lever 27 for the left and right wheels is connected to the other end of the brake side cable 23, and the brake lever 27 is urged rightward in FIG. The other end of the operation side cable 22 is connected to a manual lever 29.

Accordingly, in the parking device having such an equalizer 21, the brake-side wire 23 is stretched rightward in FIG. 1 by the biasing force of the spring 28, and biases the relay plate 24 rightward via the pin 25. . The relay plate 24 also receives the urging force of a spring 26, and the relay plate 24 urges the operation side cable 22 rightward in FIG. 1 via a locking knot 22a.

In the parking device equipped with such an equalizer 21, when the manual lever 29 is pulled up, the operating side cable
22 is pulled to the left in FIG. Accordingly, the relay plate 24 is moved leftward via the locking knot 22a, and the brake-side cable 23 is also pulled leftward via the relay plate 24 and the pin 25. Accordingly, the brake lever 27 is actuated, whereby the brake shoe is actuated to perform the braking action.

When the manual lever 29 is returned downward from this state, the leftward force acting on the relay plate 24 via the operation cable 22 and the locking knot 22a in FIG. The relay plate 24 is moved rightward in FIG. Along with this, the brake side wire 23 is also pulled rightward in FIG. 1, and the brake lever 28 is returned to release the braking action.

In the brake release operation, when the manual lever 29 is quickly returned, the manual lever 29 is determined based on the moving speed of the relay plate 24 that is moved depending on the springs 26 and 28.
In some cases, the moving speed of the operation-side cable 22 linked to the moving speed becomes faster. However, in such a case, the return force of the operation side cable 22 is not transmitted from the locking knot 22a to the first recess 2a.
6b and transmitted to the spring 26,
The signal is transmitted from c to the brake-side cable 23 via the pin 25. Therefore, the cable 23 is returned at substantially the same speed as the cable 22.

g. Effect of the Invention As described above, in the equalizer of the parking brake device according to the present invention, the spring release allows the return operation of the operation side cable to be reliably transmitted to the brake side cable via the spring. Can be done,
Moreover, the operation side cable and the brake side cable are linked by a spring for urging the relay plate and are linked by engaging them with the first and second concave portions, so that the number of parts does not increase, and Easy to assemble.

[Brief description of the drawings]

1 is a sectional view showing an equalizer of the parking brake device according to the present invention, FIG. 2 is a perspective view showing a spring employed in the equalizer, and FIG. 3 is a conventional parking brake device. FIG. 4 is a conceptual cross-sectional view showing an enlarged view of the equalizer, and FIG. 5 is a partial plan view showing one embodiment of an operation state of the equalizer. 20 ... Equalizer, 21 ... Casing, 21a ... Manual lever side wall, 21b ... Brake shoe side wall, 21c ... Side wall, 22 ... Operating side cable, 22a ... Locking knot, 23 ... Brake side cable, 24 ... Relay plate, 25 ... Pin , 26 ... spring, 26
a hook, 26b first concave portion, 26c second concave portion, 26d coil portion, 27 brake lever, 28 spring, 29 manual lever.

Claims (1)

(57) [Scope of request for utility model registration] An end of one operating-side cable connected to a manual lever and an end of two brake-side cables connected to a brake shoe are opposed to a manual lever side wall of a casing and a brake shoe. Each of the brake-side cables is arranged in parallel with the side wall facing the inside of the casing, and the operation-side cable is sandwiched in the casing, and the end of the operation-side cable is inserted into the intermediate portion of the relay plate. Forming a locking knot at the end of the cable to engage the cable with the relay plate, and locking the ends of the brake-side cable to both ends of the relay plate via pins, respectively, Further, a spring is disposed between the relay plate and the casing, and the relay plate is disposed on a side wall of the brake shoe of the casing. In the equalizer of the parking brake device which urges in the direction, the spring is formed in a substantially U-shape as a whole, has hooks at both ends to be locked to a wall of the casing, and a center of the operation cable for the operation cable. A first recess for engaging the stop knot; a second recess on each side of the first recess for engaging the pin, and a coil between the second recess and the hook; By configuring a spring and disposing the spring on the locking knot, the pin, and the wall of the casing, a return operation of the operating cable when the brake is released is transmitted to the brake cable via the spring. An equalizer for a parking brake device, characterized in that the equalization is performed.