JPH07291106A - Emergency brake device for cold district vehicle - Google Patents

Abstract

PURPOSE:To stop a vehicle at a short braking distance with its assured safety, using an emergency brake device for cold district vehicle when the vehicle stops emergently on a slippery road such as an icy road and a frozen road in a cold district, and prevent dust pollution. CONSTITUTION:A braking disc 6 and a braking disc driving cylinder 5 are mounted onto the rear lower part of a vehicle, and the braking disc 6 is driven with compressed air pressure through a brake pedal, an electrically-operated two-way valve 2, a control valve driving cylinder 1 and a control valve 4 used in the vehicle to apply braking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake device.

[0002]

2. Description of the Related Art A conventional vehicle brake system utilizes only frictional resistance between a tire and a road surface.

[0003]

With the regulation of spiked tires, the braking performance of studless tires on the road surface such as snow and ice burn has improved considerably, but there is still a difference compared to the braking performance on dry road surfaces. It is too big to drive with peace of mind, and an accident due to a slip in the winter
It occurs frequently.

The present invention provides a braking distance shorter than that of a conventional braking device when an emergency stop is required while a vehicle is traveling on a slippery road surface such as snow and ice in a cold region.
The purpose is to be able to stop.

[0005]

In order to achieve the above object, the present invention is a steel brake plate which is pressed against the road surface only when an emergency stop is required, that is, when the brake pedal of the vehicle is strongly depressed. It intends to stop the vehicle.

When the driver determines that the emergency braking device is not needed, such as when the road surface is dry even in the summer or in the severe winter, the emergency braking device can be operated even if the brake pedal is strongly depressed by operating the switch in the driver's seat. Does not work.

Further, by providing the position of the braking plate at the rear part of the vehicle, the braking force of the emergency braking device is larger than the braking force of the front wheels when the emergency braking device is activated, so that the vehicle is stopped in a straight traveling state without causing a spin or the like. To do.

Further, since the braking plate is provided at an acute angle with respect to the traveling direction, the weight of the vehicle is added to the force of the braking plate driving cylinder when the braking plate is in operation, so that the force of the braking plate to push the road surface is doubled. The braking force then increases.

[0009]

By providing the emergency braking device as described above, when the vehicle needs an emergency stop on a road surface such as snow or ice burn, the vehicle can be stopped at a shorter braking distance than before.

[0010]

EXAMPLES Examples will be described with reference to the drawings.
In FIG. 1, the pipe A is connected to the hydraulic brake system of the wheel, and when the brake pedal in the driver's seat is depressed, the hydraulic pressure passes through the electric two-way valve 2 and the control valve drive cylinder 1
Be transmitted to.

When the hydraulic pressure of the hydraulic system of the wheel is small, the force of the spring 3 in the control valve drive cylinder is overpowered so that it is not driven, but when the brake pedal is strongly depressed,
The hydraulic pressure of the hydraulic brake system of the wheel hits the spring 3 and pushes down the piston in the cylinder to operate the control valve 4. This is because the emergency braking device does not operate in normal braking operation, but operates only when the brake pedal is strongly depressed.

Further, the electric two-way valve 2 is a control valve drive cylinder which is closed by operating the switch in the driver's seat when the driver thinks that the emergency braking device does not need to be actuated, such as in summer or when driving on dry roads. By shutting off the hydraulic pressure to 1, the emergency brake device can be made inoperative.

When the brake pedal is pressed hard with the electric two-way valve 2 open, the control valve drive cylinder 1 operates.
At the same time, the control valve 4 is actuated so that the compressed air passes through the pipe B connected to the tank of the air compressor to the pipe D.
Then, the piston in the brake plate drive cylinder 5 is pushed, and the pipe C is opened so that the piston is pushed down and the brake plate 6 attached to the fulcrum 7 is pushed to the road surface.

A steel claw 12 is attached to the braking plate 6, which produces a large frictional force with the road surface and stops the vehicle for a short braking distance.

Further, since the hydraulic pressure of the wheel brake system is lowered by releasing the foot from the brake pedal, the control valve 4 is actuated by the force of the spring in the control valve driving cylinder 1, the pipe D is opened, and the compressed air is piped. Since it is sent to the brake plate drive cylinder 5 through C, the piston is pushed up and the brake plate 6 is returned from the road surface to the original position.

[0016]

Since the present invention is constructed as described above, it has the following effects.

By attaching an emergency brake device to a vehicle for cold regions, the emergency stop braking distance when driving on a snow-covered or ice-burned road surface is shortened, and, in addition, the vehicle can go straight without causing spin as in conventional vehicles. Because it will stop
Can reduce traffic accidents

Further, the present invention damages the asphalt on the road surface only at the time of emergency stop, but it does not operate by the brake operation in normal running, and in consideration of the frequency of emergency stop, it does not cause dust pollution again.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an emergency brake device for a cold region vehicle.

FIG. 2 is a cross-sectional view of a control valve.

FIG. 3 is a perspective view of a braking plate.

[Explanation of symbols]

 1 control valve drive cylinder 2 electric two-way valve 3 spring 4 control valve 5 braking plate drive cylinder 6 braking plate 7 fulcrum 8 vehicle rear wheel 9 road surface 10 piston 11 valve 12 pawl

Claims (1)

[Claims] 1. An emergency braking device for a vehicle using a braking plate, which is used only in an emergency on a snow-covered road surface or an ice-burned road surface in a cold region.