JPH0527327Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a brake mechanism for automobiles. The purpose of this is to shorten the braking distance of the vehicle by shortening the distance traveled by the brake pedal when the free part of the brake pedal is depressed during braking at high speeds.

[Conventional technology]

Automobile brakes are hydraulic, and compress brake oil by pressing a pedal, and use this force to press a brake drum or brake disc to stop the tires.

By the way, brake performance can be expressed in terms of whether it works evenly regardless of weather or speed, but it is generally expressed in terms of braking distance. In other words, the ability of the brake is judged by how far the vehicle has traveled from the point where the foot starts pressing on the brake pedal and the vehicle comes to a stop.

Further, this foot brake always has "play", that is, a range in which the brake oil is not compressed even when the brake pedal is pressed, in consideration of driving operability and safety. Therefore, the brake lamp lights up a moment before the actual braking starts, reducing accidents caused by unexpected sudden stops, which improves safety, and since braking does not occur just by touching the pedal, other pedals (such as the accelerator pedal) This has the advantage of ease of operation, such as eliminating the need to pay extra attention when changing steps.

[Problem that the invention attempts to solve]

However, the distance traveled in the time it takes to press the free part of the brake pedal (idle running distance) is a considerable distance when driving at high speed (for example, when driving at 80 km/h in 1 second).
This means that the driver must run more than 22 meters (1 meter can be covered in less than 0.05 seconds), and this distance can lead to a serious accident, especially in an emergency.

Also, don't just step on the brake once,
Normally, the so-called double brake is performed, in which the brake is depressed once, then released, and then depressed again. This is particularly noticeable when the amount of brake oil compressed by one stroke of the brake pedal is not enough, but the operation itself takes time, and it is necessary to Sometimes it is impossible to carry out such operations. Therefore, the braking distance will be extended.

[Means for solving problems]

Therefore, in view of the above points, the inventor of the present invention, as a result of intensive research, determined that during the play stroke of the brake pedal,
They developed a mechanism in which a separately provided braking mechanism is activated. This has the characteristic that a motor is rotated by a switch acting during the idle stroke of the brake pedal, and a cam driven by the motor drives a piston that presses brake oil.

The "switch" is linked to the foot brake pedal, and is activated when the pedal is depressed over a certain level. Further, it is desirable that the switch is automatically released, for example, when the brake pedal is stopped being depressed or after a certain period of time has elapsed.

The "motor" is a drive source for rotationally driving the cam, and an existing motor such as a starter motor may be used, or it may be added separately. As for the power source, you are free to use an existing car battery or install a new one.

"Brake oil" is the oil that is injected into the master cylinder to operate the brake drum and brake disc. The brake is obtained by this hydraulic pressure.

Next, the operation of the brake mechanism of the present invention will be briefly explained.

When the brake pedal is depressed, the switch is engaged during the free stroke (generally about 3 to 6 mm), and the motor rotates the operating cam. This cam reciprocates the cylinder and overfeeds brake fluid into the master cylinder. Therefore, the state is similar to that of double braking, and then from the time when the idle stroke is exceeded and the normal braking state is entered, the effectiveness of the brake is improved and the braking distance can be shortened.

〔Example〕

The present invention will be explained in more detail below based on embodiments shown in the drawings.

FIG. 1 schematically shows essential parts of an example of a brake mechanism 1 according to the present invention.

A brake mechanism 1 supplies brake oil to a master cylinder 3 by pressing a brake pedal 2, as in a general brake mechanism, and supplies brake oil to a master cylinder 3 by pressing a brake pedal 2.
It has the ability to apply braking force to. However, unlike the conventional model, the brake pedal 2
It has a feature that it does not run idle with an idle stroke l out of the total depression amount S.

That is, as is clear from the figure, when the switch 4 is turned on with the play stroke l, the motor 5 immediately and automatically starts driving and rotates the cam 6. The cam 6 moves the piston 7 back and forth to intermittently inject brake oil into the master cylinder. Therefore, braking has already been applied a moment before the brake pedal reaches its effective position, and since the brake is intermittent, unlike one that simply eliminates play, the driver is applying the so-called double brake. This will result in the same state as .

In addition, in the experiment conducted by the present inventor, motor 5
showed the greatest effect when the rotation speed was around 300 revolutions per second. In this case, I was driving at 60km/h and then pressing the brake pedal with all my might and stopping after 5m.

For example, when traveling with a heavy load on board, the braking distance will be long, but if the brake mechanism of the present invention is used, it will be possible to stop within the same distance as normal, dramatically improving safety.

Of course, such a brake mechanism 1 may be unnecessary when traveling at low speeds, so the switch 4 may be configured to operate only when traveling at a speed of 40 km/h or more, for example. Alternatively, the driver may be able to select the operation of the switch depending on circumstances such as whether heavy objects are loaded or not.

[Effect of idea]

As explained in detail above, the brake mechanism according to the present invention is a mechanism in which a switch is inserted between the idle strokes of the brake pedal, and the switch causes the motor to rotate, and the cam driven by the motor to brake. It is characterized by driving a piston that presses oil, and can perform double braking, which is known as an effective braking method, with just one step, and is especially important when driving at high speeds. It also eliminates the problem of idle running between the strokes of the brake pedal, and for other reasons, it dramatically shortens the braking distance and is extremely effective in practice, promising improved safety. It is an idea.

[Brief explanation of the drawing]

FIG. 1 is a schematic view of the main parts of one embodiment of the brake mechanism according to the present invention. 1...brake mechanism, 2...brake pedal,
3...Master cylinder, 4...Switch, 5
...Motor, 6...Cam, 7...Piston, W
...wheels, S...total amount of brake pedal depression,
l...A playful stroke.

Claims (1)

[Scope of utility model registration request] In a braking system in which a piston compresses brake oil by pressing the brake pedal and supplies it to the master cylinder to decelerate or stop the vehicle, a switch is activated during the idle stroke of the brake pedal. A brake mechanism that compresses brake oil to apply braking, and includes a switch in contact with the brake pedal, a motor that is driven in conjunction with release of contact from the switch, and a cam that is rotated by the motor. A brake mechanism characterized in that the cam presses and drives the piston interlocked with the brake pedal in a direction that compresses brake oil at a portion beyond the play.