JP2714637B2 - Automotive brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a braking system for a vehicle, and more particularly to a new vehicle having an automatic stepping-off operation for automatically performing "braking-braking-releasing-braking" during emergency braking during high-speed running. The present invention relates to a brake device for a vehicle.

[0002]

2. Description of the Related Art In driving a motor vehicle, a braking operation during high-speed driving is performed by decelerating the vehicle to a predetermined vehicle speed and then depressing a brake pedal again to stop the vehicle.
"Stepping on the key". In particular, when the road surface is wet due to rain or the like during high-speed running and the frictional resistance between the tire and the road surface is relatively small, if the rotation of the tire is stopped (locked) by the brake operation, the tire slides between the tire and the road surface. It is well known that the resulting braking distance increases. Therefore, it is necessary to step on the brakes, especially at high speeds.

[0003] However, particularly when the driver steps on the brakes suddenly, the traveling of the vehicle is in a dangerous state. In this case, it is difficult to release the brake pedal even momentarily.
It is a difficult operation unless you are a very skilled driver.In general, the brake pedal is depressed as much as possible to stop at a short distance, and as a result, the tires are locked and the braking distance is extended. It is.

[0004] In view of such circumstances, in recent years a moment when the tire is slipping in accordance with the situation of the road surface, which is configured to release the brake, walk the blur - liver - de advance intermittently braking A vehicle equipped with a braking device having an anti-lock mechanism configured to switch to a mode in which the vehicle is switched to a driving mode has also been put to practical use.

[0005]

However, the antilock mechanism in the above conventional braking device is electronically controlled by a microcomputer, and malfunctions when the control system is destroyed by the influence of lightning or the like. To produce
In particular, there was a problem in reliability in bad weather. In the former case, the road surface condition and the presence / absence of slip are detected by a number of sensors, which are automatically determined by a microcomputer to instantaneously release the brake. There is a problem that the structure becomes complicated and the production cost rises. On the other hand, in the latter case, since the brake mode must be selected in advance, the antilock mechanism is not used properly in an emergency. Had a problem.

[0006] The present invention has been made in view of the above problems, and facilitates emergency operation and has high reliability.
It is an object of the present invention to provide a brake apparatus for an automobile which is capable of stepping on a mechanically controlled brake having a simple structure.

[0007]

SUMMARY OF THE INVENTION A vehicle brake system according to the present invention provides a hydraulic or wire cable between a brake pedal provided on a driver's seat and a brake mechanism provided on a vehicle wheel side. In a vehicle brake device driven and connected by a drive connection mechanism, mechanical means is provided in the drive connection mechanism for drivingly connecting the brake mechanism and the brake pedal.
The motor is driven to rotate by a motor, and when a brake release signal is input, the drive transmission force canceling mechanism is instantaneously actuated to brake the drive coupling mechanism from the brake pedal. A cam mechanism that temporarily and temporarily cancels the operation in the direction, and a brake mechanism that is provided near the driver's seat,
Switch between continuous stepping mode and automatic stepping mode
Forced stepping configured by a changeover switch that has a structure
Detection switch and the speed of the car
Car that will output a signal when the vehicle speed exceeds
Speed sensor and brake pedal are depressed
Provided to operate “ON” at the same time as a simultaneous “O” signal from a forced step switch or / and a vehicle speed sensor.
The "N" signal causes the cam mechanism to shake via the motor.
A brake consisting of a brake sensor that outputs a key release signal
· The force becomes a releasing device additional configuration to either during "ON" operation of the forced Fumiwake switch, or preset vehicle speed
When the brake pedal is depressed while the vehicle is running beyond the limit, the brake mechanism of the vehicle that has been operated in the braking direction is instantaneously released.

[0008]

When the brake pedal is depressed, the braking mechanism is driven because the brake pedal and the brake mechanism provided on the wheel side of the vehicle are drivingly connected by a drive connection mechanism such as hydraulic pressure or a wire cable. To stop the rotation of the tire.

At this time, the forced stepping switch is set to “O
N ", or when the vehicle is running at a high speed and the speed sensor of the vehicle is" ON ", and the brake pedal is depressed, the brake sensor is simultaneously turned" ON "by operating the brake pedal. As a result, a brake release signal is output, the motor is driven, and the brake forced release device including the cam mechanism operates instantaneously.

Therefore, the brake mechanism that is connected and driven by the drive connection mechanism that transmits the depression of the brake pedal to the brake mechanism is instantaneously released by the brake forcible release device. At the moment, the braking mechanism operates again to start the braking operation of the automobile.

[0011] By the operation of "brake-brake release-brake", even if the tire is locked at the beginning of braking and slips between the tire and the road surface, the brake forcible release device is operated at the next moment. Since the tires are unlocked, slippage with the road surface disappears. Then, the braking mechanism is actuated again. At that time, the speed of the vehicle is reduced by the initial braking operation (when the speed is not sufficiently reduced, the operation of releasing the braking is performed again). it is possible to stop the car in a short period of time, resulting in the road surface
The braking distance can be reduced while suppressing slippage of the vehicle .

An embodiment of a vehicle brake device according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an automotive brake system showing the principle of the present invention, and FIG. 2 is a timing chart for explaining the operation of the system according to the vehicle speed state . In FIG. 1, reference numeral 1 denotes a braking mechanism provided on a wheel 12 side of an automobile, and 2 denotes a brake provided on a driver's seat.
The brake pedal 1 and the brake pedal 2 are driven and connected by a drive connection mechanism 3 such as a hydraulic or wire cable.

[0013] The blurring of the present invention - key forcibly release device 4, control
The drive mechanism is arranged in the middle of a drive connecting mechanism 3 for drivingly connecting the moving mechanism 1 and the brake pedal 2, and the drive is transmitted by a cam mechanism 6 which is rotated by the motor 5 when a brake release signal S 1 is inputted. shake the power-prevention mechanism 7 instantaneously operated - Kipeda
The operation in the braking direction from the steering wheel 2 is temporarily canceled in the middle of the drive connection mechanism 3 .

[0014] The brake release signal S1 is output from the cam drive.
This is a signal output from the control mechanism 11, and when the forced stepping switch 8 is turned on, or when the vehicle speed sensor 9 and the brake sensor 10 simultaneously turn on the "ON" signal, the output standby state is established. Cam drive system from 6
Fi input into control mechanism 11 - Dobakku Timing of signal S2
(See <1> in FIG. 2). Feed
The back signal S2 outputs the cam position of the cam mechanism 6.
The brake release signal S1 from the cam drive control mechanism 11
Drives the rotation angle of the motor 5 which drives the cam mechanism 6 to rotate.
Dynamic control. And the forced step switch 8 is
Near the steering wheel or driver's seat,
"ON" (always stepping mode) or "OFF" (automatic
Switch to the dynamic stepping mode) and select the brake mode.
This is a switch for selecting
When 8 is in the "ON" state, the brake
Every time the pedal 2 is depressed, the drive transmission force canceling mechanism 7 operates.
You.

In the above-described automotive brake device, the forced stepping switch 8 is operated or a high speed (for example, 40 km / h)
When the above is detected, the speed sensor 9 is set to "ON". Brake pedal 2 when running
Activated and depresses the shake - in which operates to the brake mechanism 1 which is actuated once in the braking direction by the depression of the brake pedal 2 momentarily temporarily <br/> release (<2> in FIG. 2).

That is, when the brake pedal 2 is depressed,
The braking mechanism 1 provided on the vehicle wheel side via the drive connection mechanism 3 operates in the braking direction to try to stop the rotation of the tire. In this case the normal friction force between the tire and the road surface is smaller than the friction force of the brake mechanism 1, the tire slip against the road surface, thus extending the braking distance of the motor vehicle. However, according to the above configuration , during the depressing operation of the brake pedal 2,
A series of multiple operations such as braking, braking release, braking
A number of actions occur in the braking mechanism. That is, when the vehicle is running at a high speed, the speed sensor 9 of the vehicle is "ON", so that when the brake pedal 2 is depressed, the brake sensor 10 is turned on.
From the cam drive control mechanism 11 in conjunction with
The key release signal S1 is output to the motor 5.

[0017] As shown in FIG .
When the motor 5 rotates the cam mechanism 6 in response to the rake release signal S1, the drive transmission force canceling mechanism 7 operates, and the depressing operation force from the brake pedal 2 connected via the drive connecting mechanism 3 is transmitted. Is temporarily eliminated, and the braking mechanism 1 is brought into a non-operation state. This inoperative state is such that when the cam mechanism 6 makes one or two rotations, a preset rotation angle θ (for example,
And outputs the detected at location) Fi - cam drive control mechanism by Dobakku signal S2 11 Karamo - blur being output to the motor 5
-The key release signal S1 is turned "OFF" to stop the cam mechanism 6 at the standby position. The stop operation causes the stepping
Operating force functions normally, and the braking force on the wheels 12 is restored.
You.

Accordingly, the depressing operation force from the brake pedal 2 is transmitted again to the braking mechanism 1 provided on the wheel 12 via the drive transmission mechanism 3. As a result, the vehicle enters the braking state again. At the start of the second braking, the forcible step switch 8 is turned "OFF", and at the same time, the speed of the vehicle is set to the speed set by the speed sensor 9 (for example, 40 km / m).
h) In the following cases (position) , brake forced release device 4
Does not operate, and the brake
The depressing operation force from the key pedal 2 is directly applied to the braking mechanism 1
Propagate to

On the other hand, at the start of the second braking, whether the forced stepping switch 8 is “ON” (always
Or when the speed of the car is
If the speed exceeds the speed set by both speed sensors 9 (automatic
In the separation mode , the braking time T1 (0.
After 1 to 0.3 seconds), the brake forcible release device 4 is operated again as described above, and is operated so as to instantaneously release the brake mechanism 1 which has been operated in the braking direction, and then the cam mechanism 6 is on standby. At the same time, the vehicle is returned to the braking state by transmitting the depressing operation force from the brake pedal 2 to the braking mechanism 1.

[0020] By repeating the above-mentioned stepping, the tire can be reliably stopped at a short distance without slipping the tire on the road surface.

The brake forcible release device 4 described according to the above principle is provided in a vehicle brake device as shown in FIG. The brake mechanism 1 in which the disc pad 14 of the brake device 13 is fixed to the wheel 12 of the automobile has a structure in which the master cylinder 15 and the brake device 13 are connected via a hydraulic amplification device 16. Master cylinder
15 is a brake forcibly releasing the end of the piston rod 17
While connected to one end of the lever rod 18 through a drive coupling mechanism 3 provided with a driving transmission force prevention mechanism 7 for location 4, the lever rod 18
Swinging end 2 of brake pedal 2 through connecting rod 19
Combined with 0.

FIG. 4 shows the actual operation of the brake forcible release device 4.
It is indicative of 施例, (a) shows the inoperative, (b) is a front view of the notch portion during operation. Reference numeral 21 denotes a sliding shaft provided on the thrust bearing 22. One end of the sliding shaft 21 is connected to the swinging end of the lever rod 18, and a pin is provided between the sliding shaft 21 and the end of the piston rod 17 of the master cylinder 15. Axis 2
The release connecting rods 23, 23, which are connected to bendable by 4, are inserted and connected.

A sprung cylinder 25 is provided so as to be orthogonal to the direction in which the release connecting rods 23 are connected, and the rear end of the sliding rod 26 and the pin shaft 24 of the releasing connecting rods 23 are used as operating rods. 7 and release connecting rod 2
3 and 23 so that it is usually arranged in a linear, sliding rods 2
6 is constituted by a driving force canceling mechanism 7 which is always elastically urged in the direction of arrow A by a coil spring 30.

The other end of the sliding rod 26
A cam 28 for pressing the head of the sliding rod 26 against the elasticity of the coil wire 30 is provided on the opposite shaft, and the cam mechanism 6 is rotatably connected to the motor 5 via a speed reducer 29. Release of brake from cam drive control mechanism 11
The motor 28 is rotated so that the cam 28 makes one or two rotations according to the signal S1.
The configuration is such that the rotor 5 is driven to rotate.

That is, in the driving force transmitting force canceling mechanism 7, the pressing release of the cam 28 causes the both release connecting rods 23, 23 to move as shown in FIG.
As shown in FIG. 3B, it is instantaneously bent in a "C" shape and operates so as to cancel the braking operation force F in the braking direction applied to the master cylinder 15 from the sliding shaft 21.
When the pressing force of the cam 28 is released together with the arrow (indicated by “X”) , the release rods 23 , 23 return to a linear shape by the elastic force of the coil spring 30 as shown in FIG. Then, the brake operation force F from the lever 18 is mastered again.
It returns to the position where it propagates to the piston rod 17 of the cylinder 15 and outputs the braking force from the master cylinder 15
(Indicated by arrow and "〇") .

Bending / extending / extending work of the release connecting rods 23, 23
By repeating the movement, the master pedal
Brake applied to piston rod 17 of cylinder 15
The operation force F is interrupted, and the operation of the brake device 13 is instantaneously performed.
Will be resolved. By this automatic stepping, high speed
Locking the tires on the road during sudden braking when driving
Short braking distances for vehicles without slippage between surfaces
The separation can be reliably stopped. Also forced
If the stepping switch 8 is turned “ON”, the
Always when the mode is intermittent braking regardless of vehicle speed
Become a stepping mode and break on snowy roads and frozen roads.
Key operation can be ensured.

[0027]

As described above, according to the automotive brake apparatus of the present invention, the depressing force of the brake is directly applied.
Release the brake to the main part of the braking mechanism
Added mechanical means to stop release operation so that it can be controlled electrically
The transmission path from the brake operation to the response is
Control transmission force can be applied directly to the braking mechanism
Improve control sensitivity and mechanically
Electronic control by CPU
Reliability and method of braking operation in bad weather with lightning
The maintainability has been significantly improved. Its operability
If the vehicle is operating in the automatic stepping mode and driving at a higher speed than the preset vehicle speed during the brake operation,
The brakes are automatically depressed when the key pedal is depressed, so that the tires are locked even if the driver fully depresses the brakes, especially in an emergency stop situation. And can be safely stopped with a short braking distance.

Further, the forced stepping switch is set to “ON”
Always Fumiwake motor actuating - If the de is no blurring related to the vehicle speed - shake every depressing the key - to become like a key Fumiwake takes place, locking the tire in the running condition, such as snowy and icy road It is necessary to select the mode , for example, to operate it so that
In such a case, the braking effect can be exerted even if it is applied, and the effect obtained by implementing the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a block diagram of a brake device for a vehicle, showing the principle of the device of the present invention.

FIG. 2 is a timing chart illustrating the operation of the apparatus.

FIG. 3 is a schematic view showing an example of an automotive brake device equipped with the brake forced release device of the present invention.

[4] blur - are those showing an example of a key force release device, (a) shows the inoperative, (b) is partially cut deleted during operation
It is a front view of the trees.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 brake mechanism 2 brake pedal 3 drive connection mechanism 4 brake forcible release device 5 motor 6 cam mechanism 7 drive transmission force canceling mechanism 8 forced step switch 9 speed sensor 10 brake sensor 11 cam drive control mechanism 12 wheels 13 Brake device 15 Master cylinder 18 Lever rod 23 Release connecting rod 25 Starting cylinder 28 Cam S1 Brake release signal

Claims (1)

(57) [Claims] 1. A brake pedal provided in a driver's seat of an automobile
(2) and wheel (12) braking mechanism provided on the side (1) between the hydraulic or wire - Ke - Automotive shake and drivingly connected by a drive coupling mechanism (3), such as a table - the key device, the brake mechanism (1 ) And a brake pedal (2) are driven and connected by a motor (5) and a drive transmission canceling mechanism (7) formed by mechanical means in the middle of a drive connecting mechanism (3 ) for driving and connecting the brake pedal. Key release signal
When (S1) is input, the drive transmission force canceling mechanism (7) is instantaneously operated, and the brake pedal of the drive connecting mechanism (3) is operated.
A cam mechanism (6) for temporarily canceling the operation in the braking direction from (2) for a short period of time; and a brake mechanism provided near the driver's seat and constantly depressing the brake mode.
It is structured to switch between the brake mode and the automatic stepping mode.
Forced step switch configured by the changeover switch
H (8), when the vehicle speed is detected and exceeds a preset vehicle speed
Speed sensor for outputting a signal to a vehicle (9)
If, shake - the brake pedal (2) when the depressed "ON"
Provided to operate, forcing Fumiwake switch (8)
And / or a cam mechanism via a motor (5) by a simultaneous "ON" signal from a vehicle speed sensor (9).
A brake forced release device (4) comprising a brake sensor (10) for outputting a brake release signal (S1) to (6).
The brake pedal is operated when the forcible depression switch (8) is turned on or when the vehicle speed exceeds a preset vehicle speed.
(2) A brake device for an automobile, wherein the brake mechanism operates so as to instantaneously release the brake mechanism of the automobile which has been operated in the braking direction when the user steps on (2) .