JP2714638B2 - Automotive brake system - 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 an automobile, and more particularly to an automatic braking system for automatically performing a brake operation, which automatically performs "braking-braking-releasing-braking" wheel operations during emergency braking. It relates to a brake device.

[0002]

2. Description of the Related Art In a brake operation during driving a car, a so-called "brake stepping" is performed in which the vehicle is decelerated and then depressed again to stop the vehicle. The present inventor has filed a Japanese Patent Application No. Hei 5-13148 filed earlier.
In the specification of No. 7, an automobile brake device that automates brake stepping was proposed. If the prior art is outlined with reference to FIG. 5, the principle of the device is shown in a block diagram of FIG. 5A. When a brake pedal 2 provided on the driver's seat is braked, the brake mechanism 1 provided on the wheel 12 side is moved. In the middle of the drive connecting mechanism 3 for transmitting the braking force by hydraulic means or a wire cable, the brake force canceling device 4 for operating the drive transmitting force canceling mechanism 7 to release the brake is linked to the drive connecting mechanism 3. At the same time, an "ON" signal from a brake sensor 10 provided on the brake pedal 2,
In response to an "ON" signal obtained according to the running conditions, a wheel operation that causes a "brake-brake release-brake" stepping phenomenon is automatically performed.

That is, when a brake release signal S1 output by a simultaneous "ON" signal from the brake sensor 10 and the forced depression switch 8 or the speed sensor 9, the brake release device 4 is rotated by the motor 5. The drive transmission force canceling mechanism 7 is instantaneously actuated by the cam mechanism 6 to temporarily cancel the operation of the drive connecting mechanism 3 in the braking direction from the brake pedal 2, and then the cam position is output from the cam mechanism 6. The feedback signal S2 is input to the cam drive control mechanism 11, the drive of the motor 5 is controlled, and the brake forcible release operation is stopped.

FIG . 5 (B) shows a device according to the present invention corresponding to the vehicle speed.
To explain the operation of the brake release device.
This shows the timing chart. The <1> state in the figure is forcible
Automatic stepping mode with the separating switch 8 set to "OFF"
In the figure, <2> indicates a forced step
When the switch 8 is set to "ON", the state of the continuous stepping mode is
Is shown. Then, the brake forcible release device 4 is operated.
The vehicle speed sensor 9
Is set to "ON". Therefore, at the time of braking operation of the brake pedal during high-speed running at a speed higher than the set speed, the brake forcible release device 4 is operated, and the forced stepping is automatically performed.

On the other hand, when the forced step switch 8 is set to "OF"
In the "F" state, when the vehicle speed sensor 9 becomes equal to or lower than the set speed, only the "ON" signal is output from the brake sensor 10 due to the braking operation of the brake pedal 2, so that the forcible brake release device 4 does not operate, and The power propagates to the braking mechanism 1 as it is to brake the vehicle.

On the other hand, when the forcible depression switch 8 is "ON", a simultaneous output with the "ON" signal is obtained from the brake sensor 10 even at a set speed or less, and the brake release signal S1 is output. Accordingly, the brake forcible release device 4 operates to perform the above-mentioned automatic forcible stepping operation.

According to the prior application technology of the above-mentioned automobile brake device by the present inventor, the automatic forcible stepping operation of the above-mentioned forcible brake release device suppresses the slipping effect of the vehicle transportation on the road surface, and the vehicle can be reliably moved in a short distance. To stop.

[0008]

SUMMARY OF THE INVENTION The present invention is a means different from a means for controlling the drive of a motor by a feedback signal for outputting a cam position from a cam mechanism, and a drive transmission force canceling mechanism directly linked to a drive coupling mechanism. Directly detects the displacement of the cam at the point of time and attempts to facilitate instantaneous drive control of the motor by electrical processing. Electricity-enhanced operability and reliability have been improved, and a simple structure has been adopted to automatically forcibly decelerate the brakes.
It is an object of the present invention to provide a mechanically controlled vehicle brake device.

[0009]

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. to key device, blur - - automotive blur and drivingly connected by a drive coupling mechanism when the vehicle braking operation by the brake pedal, momentarily releasing the braking state of the braking mechanism, automobile blur was as controlled - in key device, Mo −
Rotation of the cam mechanism driven by the rotation of the
Is connected to the spring cylinder with seat
Bending pedal that can be bent and brake pedal and link machine
Brake release operation by connecting to the master cylinder via
A braking mechanism for performing the intermediate bending operation.
And a relay mechanism directly connected to the cam mechanism.
Adds and configures a relay press fitting that performs downward movement,
Relay side contacts by the downward movement performed by the relay press fitting
ON of the motor and OFF operation of the motor side contact simultaneously or upward
The relay-side contact OFF and motor-side contact
ON operation at the same time and the upward and downward movements alternately
By doing so, the rotation of the cam mechanism and the drive stop of the motor
A series of operations to stop and restart
This is configured by providing a relay mechanism that performs the operation via a relay.

[0010] Further, according to the present invention, the drive transmission force canceling mechanism comprises:
The operation is stopped by the cam-side sliding rod and the firing cylinder provided with the drive coupling mechanism interposed therebetween, and the braking mechanism that has released the braking state is returned to the braking state.

In the device of the present invention, the cam drive
Drive control of the motor via link mechanism and rotary switch
Except for the components described above , braking control is performed using a brake release signal and a feedback signal for outputting a cam position from a cam mechanism. It is. Therefore, in the following description, the description of the feedback signal S2 is omitted in the overall configuration of the present invention.
This will be described briefly with reference to FIG.

[0012]

When the brake pedal is depressed, the brake mechanism operates via a drive coupling mechanism comprising a hydraulic amplification device and a wire cable to stop rotation of the tire wheels, but the brake sensor operates. And a forced step switch or /
And the simultaneous "ON" signal output from the vehicle speed sensor outputs a brake release signal, and the cam drive motor is driven to rotate to instantaneously activate the brake forcible release device provided with a cam mechanism. Operate.

Subsequently, the cam of the cam mechanism operates the relay mechanism.
By operating, the relay is excited and the rotary switch is turned on.
Switch to the operation standby state, and shut off the motor side circuit.
To stop the rotation driving force of the cam mechanism and return the cam to the standby state.
Then, close the motor side contact of the relay mechanism and rotate the switch.
Pitch again by actuating motor - motor causes the rotation driven to rotate the cam of the cam mechanism, again blur - key forcibly release device is activated, relay - exchange a rotary switch having a mechanism and multi-point contact
By operating them alternately, the motor rotation drive-stop-drive is repeated.

[0014] Even if the brake-locked wheel slips on the road surface at the beginning of braking due to the repetitive operation / stop operation of the motor, the lock is released frequently and the slip on the road surface disappears. As a result, the vehicle speed decreases, and as a result, an effect of shortening the braking distance is obtained.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a vehicle brake system according to the present invention. 1A is a schematic diagram showing a main part configuration, FIG. 1B is a system block diagram including a relay mechanism, FIG. 2 shows a relay mechanism, FIG. 1A shows a non-operating state, and FIG. FIG. 4 is a side view including a partial cross section during operation.

As shown in FIG. 1A, the braking mechanism 1
A brake device 13 in which a disk pad 14 of a brake device 13 is fixed to a wheel 12 of an automobile is connected to a master cylinder 15 via a hydraulic amplifying device 16. Drive coupling mechanism 3 including drive transmission force canceling mechanism 7
Is connected to one end of the lever rod 18 via the
The other end of 8 is connected to a swinging end 20 of the brake pedal 2 via a connecting rod 19. The input switch 22 of the brake forcible release device 4 is attached to a handle 24 provided in the driver's seat.
And an indicator light 21 for indicating the input state by lighting.

Here, the sliding rod 26 is moved leftward in the figure by the farthest end on the outer periphery of the cam 28 which is rotated by the rotation of the motor 5 of the brake forcible release device 4, and the release connecting rod of the drive connecting mechanism 3 is released. 23 is instantaneously bent in a "C" shape, and as a result, the braking state is released so that the braking force from the brake pedal 2 is not transmitted.

Next, as shown in FIG. 1B, a relay mechanism 11a for operating the cam drive control mechanism 11 of the brake forced release device 4 includes a pedal switch 2a and the brake It is provided via the input switch 22 of the forced release device. Reference numeral 25 indicates “ON / OFF” for directly driving the motor 5 and “ON / OF” for driving the motor 5 indirectly via the rotation switch 29.
F ", and a plurality of claw fittings 29a attached to the outer periphery of the rotary switch 29 are simultaneously rotated by a fixed distance.
Push out 0 and turn ON / OFF the rotary switch 29
This is a relay that operates the operation rod 27 with a relay for performing an operation. By this relay mechanism 11a, the motor 5 to be rotationally controlled is connected to the master cylinder 15 via the drive connection mechanism 3.

As shown in FIG. 2, the relay 25 has an electric circuit connected to a terminal connected to a relay contact a for turning ON / OFF the operation rod 27 with a relay and an ON / OFF connection to the motor 5 side. And a terminal communicating with the motor side contact b, and a coil 25b wound around the outer peripheral wall of the relay pedestal 25a via the coil fulcrum fulcrum 35, and a double lever rod 31 provided on the upper part thereof is provided. By moving up and down, one of the circuits of the relay side contact a and the motor side contact b is closed. Here, the double lever 3
1, two long and short lever rods are separated by a predetermined distance and movably restrained at substantially the center, and the outer end of the short lower rod is held on the inner wall of the relay 25, while the free ends of the long upper rod are A relay contact a and a motor contact b are formed.

That is, the relay side contact a closes the electric circuit by contact between the upper side of the lower lever 33 provided on one side of the outer wall surface of the relay 25 and the lower end of the upper end of the double lever 31. The electric circuit of the motor side contact b is closed by contact between the lower side of the upper rod 32 provided on the outer wall surface on the other side of the relay 25 and the upper side of the other free end of the upper rod. When the cam 28 is rotated by the rotation of the motor 5,
Pushing down the spring cylinder 38 with the seat via the rotating roller 37 attached to the top, and simultaneously hanging on the wire rope 41 and pushing down the relay press fitting 39 held in the cylinder 38 with the seat. As a result, the double lever 31 abutting on it moves downward and closes the open relay contact a.

FIGS. 3A and 3B illustrate an embodiment of the drive transmission force canceling mechanism 7 of the device of the present invention. FIG. 3A shows a non-operating state, FIG. 3B shows an operating state, and FIG. Similarly, another embodiment of the drive transmission force canceling mechanism is shown.
(B) shows the operation time. As shown in FIG. 3A, a sliding shaft 42 connected to one end of the lever rod 18 and held by a thrust bearing 43, and a piston rod 1 of the master cylinder 15
7 and a release rod 23 composed of two members is provided, and a sliding rod which receives the rotational pressure of the cam 28 via a rotary roller 37 on one side with the connection point of the two members interposed therebetween. On the other side, a spring type cylinder 44 is provided, and the sliding rod 26 is moved to deform the release connecting rod 23 held in the braking direction into a "<" shape to release the braking state. At the same time, when the external force of the deformation is eliminated, the firing cylinder 44 returns the release connecting rod 23 to the braking state.

Further, as shown in FIG.
3 is an iron case 48 whose adjacent ends are rotatably connected by a rotary joint 49 formed of a rotary bearing or the like.
And a plurality of chains or rollable disks or rings 47 may be built inside the case 48. The two cases 48 are positioned so that the two cases 48 are adjacent to each other at the positions of the sliding rod 26 that is displaced by the rotation of the cam 28 and the release connecting rod 23 that comes into contact with the sprung cylinder 44. Is provided, and an opening 45 is provided in the case 48 on the lever 18 that does not deform in the shape of the "<", so that the stopper 46 held by the thrust bearing 43 is free when the brake pedal is braked. When the end portion is received in the case 48 and the release connecting rod 23 undergoes a deformation operation, the disk or the ring body 47 in the lever rod 18 side case 48 is configured not to roll.

FIG . 6 shows an embodiment of the drive transmission force canceling mechanism.
Of the cam mechanism 6 and the motor 5
(A) is not working, (B) is working
Indicates time. Hereinafter, the present invention will be described mainly with reference to FIGS. 1, 5 and 6.
The operation of the lighting device will be described. The black arrow in the figure
Indicates a circuit portion in a closed circuit state. In the device of the present invention configured as described above , the power supply of the battery 40 is turned “ON” by the input switch 22 (see FIGS. 1A and 6) on the side of the handle 24, and the sign lamp 21 is turned on. . So
To blur - key force release device 4 the energization "permitted" state under odor
If the brake pedal 2 is depressed during driving and the brake operation is performed under the condition that the brake release signal S1 can be output,
The cam 28 is rotated by the rotation of the motor 5 before the downward movement of the relay fitting 39 (see FIG. 6A). cam
The cam 2 which comes into contact with the rotation center position of 28 and the rotation roller 37
As the outer edge distance increases, the sliding rod 26 is moved leftward in the drawing via the receiving-type generating cylinder 38, and the release connecting rod 23 abutting on the sliding rod 26 is moved to the position shown in FIG.
23A and 23B shown in FIG. 4B (or 4B shown in FIG.
8a, 48b) to change from the braking state to the braking release state. At this time, the motor 5 stops rotating.
(See FIG. 6B) .

At this time, the rotation of the cam 28 at the same time pushes down the relay press fitting 39, and the motor side contact b of the relay 25
Is set to “OFF” and the rotation of the motor 5 is stopped.
The firing cylinder 44, which has lost the external force, returns and connects the release connecting rod 23 to the braking state.

On the other hand, since the relay contact a is in the "ON" state, the relay 25 coil 25b is excited to "ON".
The rotation switch 29 in the state rotates the motor 5, rotates the cam 28 again, bends the release connecting rod 23, removes the master cylinder pressure F, and releases the braking. At the same time, the operating rod 27 with the relay 25 is driven by coming into contact with the outer peripheral claw fitting 29a of the rotation switch 29, turning off the rotation switch 29, stopping the rotation of the motor 5, and returning to the braking state again as described above. .

As described above, at the time of the braking operation, the cam drive control mechanism 11 acts on the vehicle running via the drive transmission force canceling mechanism 7 by the relay mechanism 11 a for controlling the motor 5 , and the cam 28 instantaneously operates. The rotary switch moves while the
Cam driving motor 5 conditioned by the number of contacts of switch 29
Of ON / OFF of the motor 5 is controlled.
The appropriate timing of each of the behaviors within a short period of time causes a series of "braking-braking-releasing-braking-braking-releasing-braking" forced stepping operation cycles to suppress the slip phenomenon of the wheels 12 and to provide favorable braking. Is generated.

[0028]

As described above, according to the vehicle brake system of the present invention, when the brake operation is performed by the brake pedal during high-speed running at a set speed or more, the brake can be automatically and finely divided. In particular, emergency stop is required, and even if the brake pedal is suddenly stopped, the wheel lock phenomenon can be suppressed.
The vehicle can be safely stopped with a short braking distance, and when the input switch for forced stepping is input at the driver's seat, the braking operation on a snowy road or the like has a smooth braking effect with a short braking distance. The effects obtained by implementing the present invention having various features such as the above are extremely large.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating an embodiment of a brake device according to the present invention, wherein (A) is a schematic diagram illustrating a main part configuration, and (B) is a system block diagram including a relay mechanism.

FIGS. 2A and 2B are side views including a partial cross section of the relay mechanism according to the embodiment, in which FIG.

FIG. 3 shows a drive transmission force canceling mechanism in the embodiment;
(A) shows a non-operating time, and (B) shows an operating time.

4A and 4B show another embodiment of the drive transmission force canceling mechanism, wherein FIG. 4A shows a non-operating state and FIG. 4B shows an operating state.

FIG. 5 is a diagram for explaining the overall configuration of the prior art, and FIG.
Is a block diagram, and (B) is a timing chart.

FIG. 6 shows an embodiment of a drive transmission force canceling mechanism according to the present invention.
(A) when not operating, (B)
Indicates an operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brake mechanism 2 Brake pedal 2a Pedal switch 3 Drive connection mechanism 4 Brake forced release device 5 Motor 6 Cam mechanism 7 Drive transmission force canceling mechanism 8 Forced step switch 9 Vehicle speed sensor 10 Brake sensor 11 Cam drive control mechanism 11a Relay mechanism 12 Wheel DESCRIPTION OF SYMBOLS 13 Brake device 14 Disk pad 15 Master cylinder 16 Hydraulic amplification device 17 Piston rod 18 Lever lever 19 Connecting rod 20 Swing end 21 Indicator light 22 Input switch 23, 23a, 23b Release connecting rod 24 Handle 25 Relay 25a Coil 26 Sliding rod 27 Actuating rod with relay 28 Cam 29 Rotary switch 29a Outer claw metal fitting 30 Spring type press fitting 31 Double lever lever 32 Upper rod 33 Lower rod 34 Relay side terminal 35 Coil starting fulcrum 36 Motor side terminal 37 Rotating roller 3 Reference Signs List 8 Trigger type cylinder with receiving seat 39 Relay press fitting 40 Battery 41 Wire rope 42 Slide shaft 43 Thrust bearing 44 Trigger type cylinder 45 Opening 46 Stopper 47 Disc or ring 48, 48a, 48b Case 49 Rotating joint S1 Brake release signal S2 Feedback signal a Relay side contact b Motor side contact c Roller side contact

Claims (2)

(57) [Claims] 1. A drive coupling mechanism (3) such as a hydraulic or wire cable connects between a brake pedal (2) provided on a driver's seat and a braking mechanism (1) provided on a wheel (12) of an automobile. In contrast to the drive-connected automotive brake system,
A cam mechanism driven by the rotation of a motor (5) in an automobile brake device in which the braking state of the braking mechanism (1) is instantaneously released and controlled when the vehicle is braked by the key pedal (2). Turn (6)
Moving and lowering due to its rotation
(38) connected to the release connecting rod (2
3) is connected to the brake pedal (2) via a link mechanism.
Perform brake release operation by connecting to star cylinder (15)
A braking mechanism (1) is provided and the intermediate bending operation is performed.
And a relay mechanism (11) directly connected to the cam mechanism (6).
a) a relay fitting for performing an upward or downward movement;
(39) is added and configured, and the relay press fitting (39) performs the relay by the downward movement.
ON operation of the negative contact (a) and OFF operation of the motor side contact (b)
Relay side contact at the same time or upward operation
(A) OFF and motor side contact (b) ON operation at the same time
The upward and downward movements alternately.
Then, the rotation of the cam mechanism (6) and the drive stop of the motor (5)
And a series of operations to restart it are performed using the rotary switch (2
9. A brake device for a motor vehicle, comprising a relay mechanism (11a) for performing the operation via 9) . 2. The operation of a drive transmission force canceling mechanism (7) is stopped by a cam-side sliding rod (26) and a firing cylinder (44) provided with a drive connecting mechanism (3) interposed therebetween. 2. A brake apparatus for an automobile according to claim 1, wherein the braking mechanism (1) having released the braking state is configured to return to the braking state.