KR100299793B1 - Device for operating parking brake in emergency - Google Patents

Abstract

PURPOSE: A parking brake operating apparatus is provided to keep the braking force in an emergency, and to improve the reliability by automatically operating a parking brake with stepping on a brake pedal simply in wrong operation of a main brake system. CONSTITUTION: A parking brake operating device is composed of a parking brake emergency operating unit(3) operating a parking brake by actuating a brake pedal(24) in damaging the main brake system, and outputting braking force; and a damage detecting unit(17) detecting damage of the main brake system, and braking by applying power to the parking brake emergency operating unit. The parking brake emergency operating unit pulls an equalizer(4) fixing parking brake cables(6,7) regardless of a parking brake operating lever. The main brake system damage detecting unit applies power from a vehicle body to the parking brake operating unit by detecting damage of the main brake system. Stability of the vehicle is improved with pulling and releasing parking cables periodically in an emergency.

Description

Parking brake operating device in case of emergency

The present invention relates to an emergency operating device of the parking brake, and in particular, when the main brake system is damaged, the parking brake is operated only by the operation of the brake pedal to secure the braking force while preventing locking of the rear wheels to maintain a stable posture of the vehicle. To an operating device of an emergency parking brake.

In general, a vehicle includes a brake system that selectively reduces the vehicle speed or stops the vehicle body as needed while driving. Such a brake system generally uses frictional force to convert the kinetic energy of the vehicle into thermal energy. Friction brakes are mainly used to release them into the atmosphere and brake them.

In addition, the braking device as described above is divided into a main brake (Foot Brake) and a parking brake (Parking Brake) used for parking when driving largely depending on the purpose of use, the foot brake is mainly hydraulic The parking brake is a mechanical type, and the foot brake is obtained by using a friction force generated by pushing a friction material to a brake drum or a disc rotor, etc., which is achieved by the driver stepping on the brake pedal in the cabin, The parking brake is to brake the brake drum mounted on the propulsion shaft or to brake the rear wheel.

On the other hand, the brake system using the hydraulic pressure as the main brake of the conventional vehicle is schematically shown in Figure 1, for convenience of illustration, the disk-type front wheel and the drum-type rear wheel are shown only one portion, respectively, and the remaining portions are omitted.

That is, the brake pedal 101, which is to be operated by the driver during braking, is connected to the brake booster 103 which allows the driver's stepping power to be doubled when braking through the push rod 102, and the brake booster 103 is again connected. It is connected to the master cylinder 105 to apply pressure to the braking oil when braking via the connecting rod 104, the master cylinder 105, respectively, the wheel cylinder 106a of the disk-type front wheel 106 and the drum-type rear wheel Brake lines 108 are arranged to allow hydraulic oil to be sent to the wheel cylinder 107a side of 107, respectively.

Therefore, when the driver brakes the brake pedal 101 and pressurizes the brake pedal, the corresponding step is transmitted to the brake booster 103 through the push rod 102 and doubled, and then the master cylinder is connected via the connecting rod 104. The master cylinder 105 pressurizes the braking oil in the reservoir tank 109 to transfer the wheel cylinder 106a of the front wheel 106 and the wheel cylinder of the rear wheel 107 through the brake line 108. The pistons 106b and 107b in the wheel cylinders 106a of the front wheels 106 and the wheel cylinders 107a of the rear wheels 107 pressurize the friction material (lining or pads), respectively. Braking is achieved by braking the rotor 106c and the brake drum 107c.

By the way, in the conventional hydraulic braking device configured as described above, when the braking oil is leaked due to damage occurring in the hydraulic system filled with the braking oil, the braking force cannot be exerted despite the operation of the brake pedal 101 during braking. There was a disadvantage of an accident.

Accordingly, the present invention has been made to solve the above drawbacks, the operation of the parking brake as an auxiliary braking device only by the operation of the brake pedal when the damage occurs in the main brake system of the car and can not perform a normal braking action It is an object of the present invention to provide an operation device of the emergency parking brake which can secure the braking force in the event of an emergency and thereby increase the merchandise accordingly.

1 is a configuration diagram schematically showing a braking system of a conventional general automobile,

2 is a perspective view showing a state in which the operating device of the emergency parking brake according to the present invention is mounted on a general parking brake system,

3 is a configuration of the parking brake emergency operation device shown in FIG.

4 is a front view of the cam and gears mounted thereto shown in FIG.

* Explanation of symbols for the main parts of the drawings

1: Parking brake operation lever 2: Main cable

3: parking brake emergency operation means 4: equalizer

5: Adjustment nut 6: Left parking brake cable

7: Right parking brake cable 8: First connecting member

9: second connecting member 10: housing

11: spring 12: pressing part

13: Cam 14: First Gear

15: second gear 16: motor

17: main device damage detection means 18: braking force control valve

19: return spring 20: piston

21: contact 22: end gate

23: relay 24: brake pedal

25: variable resistor 26: battery

The present invention for achieving the above object, the parking brake emergency operation means to ensure the braking force by operating the parking brake by the operation of the brake pedal when the main drive device is damaged, and damage to the main drive device The main brake device is configured to detect and damage the main brake device so that the braking action is made by energizing the parking brake emergency operation means.

For this purpose, the parking brake emergency operation means is capable of pulling an equalizer for holding one end of the left / right parking brake cable separately from the parking brake operation lever.

In addition, the main drive device damage detecting means detects when the main drive system is damaged so that the body power is applied to the parking brake emergency operation means.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a state in which the operating device of the emergency parking brake according to the present invention is mounted on a general parking brake system, Figure 3 is a block diagram of the emergency brake operation device shown in Figure 2, Figure 4 is a view 3 is a front view of the cam shown in Fig. 3 and the gears mounted thereon.

According to the present invention, when the foot brake, which is the main driving device of the vehicle, does not function properly, the parking brake, which is the auxiliary braking device, is operated only by the operation of the brake pedal by the driver, thereby adding stability to braking. The main cable (2) is connected to the parking brake operating lever (1) installed on the floor of the vehicle adjacent to the driver, and the parking brake emergency operation means (3) is provided on the main cable (2). This parking brake emergency actuating means (3) is connected via an equalizer (4) and an adjusting nut (5), while the equalizer (4) has a parking brake actuating lever (not shown) provided on the rear wheel, respectively. The left parking brake cable 6 and the right parking brake cable 7 are connected to each other.

Here, the parking brake emergency operation means (3) provided on the main cable (2) connected to the parking brake operating lever (1) is a parking brake operation lever to assist the braking force when the main drive device such as a foot brake is damaged It is to add the stability of the braking by operating the parking brake only by pressing the brake pedal without the operation of (1), as shown in Figure 3, the parking brake operating lever (1) and the equalizer ( 4) Pulling out the equalizer 4 separately from the operation of the parking brake operating lever 1 on the main cable 2 connecting between the left and right parking brake cables 6 and 7 through the rear wheels. It can be braked.

To this end, a first wedge-shaped first connecting member 8 is coupled to the front end of the main cable 2, and one end is coupled to the first connecting member 8 as a butt rest, and the other end is connected to the equalizer 4. The second connecting member 9 which is fastened through the adjustment nut 5 is connected, and the second connecting member 9 is elastically supported on one side of the housing 10 through the spring 11 inside the housing 10. The pressing part 12 which protrudes by this is integrally provided.

In addition, a cam 13 is installed on the pressing portion 12 of the second connecting member 9 so that its outer circumferential surface is faced, and a first gear 14 is mounted on the eccentric shaft 13a of the cam 13. The second gear 15 is engaged with the outer circumference of the first gear 14, while the rotation shaft 16a of the motor 16 is fixed to the center of the second gear 15.

On the other hand, the motor 16 has a main drive device damage detection means 17 for detecting the damage of the hydraulic system of the foot brake which is the main drive device of the vehicle to power the parking brake emergency operation means (3) When the main drive device damage detecting means 17 is connected, the main brake device 17 is driven by supplying power to the parking brake emergency operation means 3 to drive the motor 16 when the main drive device is damaged while driving. The rear wheels can be braked.

To this end, the piston is opposed to each other while being supported by the return spring 19 in the braking force control valve 18 which properly supplies the braking oil pressurized from the master cylinder to the front wheel and the rear wheel during the operation of the foot brake as the main driving device. (20) are mounted, and each of the contacts (21) is fixedly installed in the braking force control valve (18) outside the piston (20), and these contacts (21) are always short-circuited via the end gate (22). (Normal Off Type) relay 23 is connected.

Here, a variable resistor 25 is connected to the relay 23 to variably adjust the magnitude of the voltage applied to the motor 16 according to the degree of rotation of the brake pedal 24 that the driver presses upon braking. The variable resistor 25 is connected to a battery 26, which is a body power source, and the variable resistor 25 is configured to supply a motor having a power proportional to the degree of pressurization of the brake pedal 24 operated by the driver during braking. The larger the amount of pressurization of the brake pedal 24 is to apply to (16), the smaller the resistance value is.

Therefore, if the braking oil is leaked from the hydraulic system of the main brake device while the vehicle is not running, braking is not performed, and the main brake device damage detection unit 17 detects this, that is, the piston in the braking force control valve 18. When the pressure of the braking oil is prevented from acting on the piston 20, and the piston 20 is opened to the left and right by the restoring force of the return spring 19, respectively, and the contact 21 is contacted, the end gate 22 is always short-circuited. The relay 23 is turned on so that the power of the battery 26 is supplied to the motor 16.

In this case, the power applied to the motor 16 adjusts the voltage of the battery 26 applied to the motor 16 in the variable resistor 25 in proportion to the amount of pressurization of the brake pedal 24 pressed by the driver. As the amount of pressurization of the brake pedal 24 increases, a larger voltage is applied to the motor 16.

On the other hand, as described above, if the damage occurs in the main drive device of the vehicle is detected by the main drive device damage detection means 17 to cause the relay 23 to supply power, the energized power is the parking brake The second gear 15 is rotated by being applied to the motor 16 of the emergency operation means 3, so that the first gear 14 meshed with the second gear 15 rotates to rotate the cam 13. As the cam 13 rotates, the pressing part 12 is pushed and then returned to its original position by the restoring force of the spring 11 and repeatedly the second connecting member 9 integrally therewith. At this time, the second connecting member 9 is coupled to the equalizer 4 so that the equalizer 4 is pulled and released at the same time, so that the left parking brake cable 6 and the right parking brake cable 7 are pulled out. Pull the rear wheels to brake, release the brakes It is presented.

At this time, the second connecting member 9, which is pushed by the cam 13 and repeats the operation of pulling and placing the equalizer 4 by the pressing unit 12 which is in the original position, has a higher rotation speed of the motor 16. As the cycle of operation becomes faster, the rotational speed of the motor 16 depends on the magnitude of the voltage supplied from the variable resistor 25 whose resistance value changes according to the degree of rotation of the brake pedal 24 pressed by the driver. Is determined by

That is, the degree of braking is periodically adjusted by the rotation of the cam 13 according to the rotation of the motor 16. This eliminates the problem that the rear wheels are locked and the vehicle body is turned during braking, so that the vehicle is stable even during braking. You will be able to maintain your posture.

And when the parking brake with the parking brake emergency operation means as described above 3, when the parking brake operation lever (1) is pulled during parking, the first connecting member (8) is coupled to the second connecting member (9) Of course, the normal parking brake is pulled.

As described above, according to the operation device of the emergency parking brake according to the present invention, when the braking force is lost due to the breakage of the main brake system while the vehicle is running, it is detected by the main driving device damage detection means and used as the emergency brake operation means. By periodically pulling and releasing the parking cable, it is possible to secure the lost braking force and to improve the instability of the vehicle posture due to early fixation of the rear wheels.

Claims (3)

The first connecting member 8 coupled to the distal end of the main cable 2 connected to the parking brake operating lever 1, and the pressing part 12 coupled to the first connecting member 8 and protruding outward on one side. 2) the second connecting member 9 having the other end coupled with the equalizer 4, the cam 13 whose outer peripheral surface is in close contact with the pressing part 12 of the second connecting member 9, and this cam ( A parking brake operating lever (1) is provided with a motor (16) for imparting a rotational force on the eccentric shaft (13a) of 13) so that the parking brake can be operated by the operation of the brake pedal 24 when the main drive is damaged. Parking brake emergency operation means (3) adapted to impart a tensile force to the parking brake cables (6, 7) separately from the; A piston 20 mounted opposite to each other in the braking force control valve 18 to be elastically supported, and a contact 21 provided on the outside of the piston 20, and connected via the contact 21 and the end gate 22. The main drive device includes a relay 23 of a short circuit type and a variable resistor 25 connected to the relay 23 to variably adjust a voltage applied according to the degree of rotation of the brake pedal 24 when braking. And a main brake device damage detecting means (17) configured to apply a power to the parking brake emergency actuation means (3) and to detect a damage of the main brake. . The method of claim 1, wherein the second connecting member 8 of the parking brake emergency operating means (3) is installed so that one side is supported by the spring 11 through the spring 11, the cam of the parking brake emergency operating means (3) The first gear 14 is provided on the eccentric shaft 13a of (13), and the second gear 15 is meshed with the first gear 14, and the motor 16 is fitted to the second gear 15. Emergency rotation brake operating device, characterized in that the rotating shaft (16a) of). The method of claim 1, wherein the relay 23 of the main drive device damage detection means 17 is connected to the motor 16 of the parking brake emergency operation means 3 to apply a variable drive voltage. Emergency brake operating device.