KR0150869B1 - Disk brake parking device - Google Patents

Abstract

The present invention relates to a brake device for a vehicle, and an object of the present invention is to provide a brake device that can reduce manufacturing costs by reducing the size and weight of a parking brake in a disk brake device.

The latch arm 4 is rotatably inserted into the inner recess 12 of the caliper 1 so that the piston 3 is coupled to one end of the latch arm 4, and the other end is connected to the side lever 6 and the cable. Composed of the operating lever (5) connected to the (61) and pulls the side lever (6) for parking and stop, the operating lever (5) is rotated in proportion to the amount of the cable 61 is pulled, the operating lever (5) () Rotates the latch arm (4) by engaging the gears of the adjustment arm (52) to the internal gear (51) of the operating lever (5) and the adjustment arm gear (52) against the latch arm (4). The piston 3 screwed to the thread 41 of the latch arm 4 pushes the brake pad 2 so that the brake pad 2 catches the disk D that rotates together with the wheels to cause braking. .

Description

Car disc brake parking lot value

1 is an illustration of a disc brake device.

2 is a view showing the operating state of the piston seal used in the disc brake device,

(a) shows no-load condition without hydraulic pressure

(b) is the state when hydraulic pressure is applied.

3 is a cross-sectional view of a conventional disc brake parking lot

4 is a cross-sectional view of a disk brake parking device to which the present invention is applied.

5 is a front view showing the internal structure of the operating lever used in the present invention

6 to 9 are operation state diagrams showing the operation relationship of the disc brake device according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Caliper 2: Brake pad

3: piston 4: latch arm

5: Operating lever 6: Side lever

7: seal 11: cylinder

12: John 31: Female thread

41: screw thread part 42: rotating plate

43: step 44: snap ring

51: internal gear 52: adjustable arm gear

54: pin shaft 55, 56: spring

57: Enforcement arm B: Booster

C: Gap D: Disc

F: Brake Pedal G: Interval

S: master cylinder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for a vehicle, and more particularly, a parking brake in a disc brake device capable of performing the functions of a main brake and a parking brake as one brake device. It is to provide a disc brake parking lot for a vehicle that can be reduced in size and weight by simplifying the construction of parts by improving the structure of the structure.

In general, a vehicle brake device is mainly used to decelerate or stop a vehicle while driving and maintain a parking state at the same time.

The brake system must be reliable in operation, excellent in stability, reliability, durability, and easy to check or adjust.

The brake device is composed of a control mechanism that transmits the driver's operating force by using a link or hydraulic pressure, and a brake body that generates the braking force by receiving the force, and maintains the main brake and the parking / stopping state. There is a parking brake and an auxiliary brake, and since the main brake is operated by the driver's foot, the foot brake and the parking brake are operated by hand, which is referred to as hand brake or parking brake.

The basic principle of the disc brake device is that two friction pads 101 (Brake Pads) are provided on both sides of a disk (D) to be driven to rotate together with the wheels, as shown in FIG. Composed of a piston (not shown) to pressurize the fluid flowing into the cylinder of the caliper 100 in the master cylinder pressurizes the piston, so that both sides of the disk (D) the friction pad 101 rotates with the wheels It is configured to brake by pressing.

When the driver presses the brake pedal to decelerate or stop the speed of the vehicle in progress, the caliper 100 is caught and braked by the disk D that rotates like a wheel, and is braked by the hydraulic pressure generated in the master cylinder. The inner piston pushes the inner pad, and the inner pad comes into contact with the disk and the outer pad holds the disk by the reaction force, and a braking force is generated.

On the contrary, when the foot is released from the brake pedal, the hydraulic pressure of the master cylinder is removed and a constant gap with the disc is caused by the recovery force of the piston 105 seal 120 (SEAL) in the cylinder 103 of the caliper 100 as shown in FIG. (G) is to maintain about 5mm.

These disc brake devices have good braking force because they radiate heat because the disc is exposed to the air and rotates, and there is little magnetic force action. For example, in recent years, a disc brake device having a better performance than a drum brake device is used.

Thus, in the related art, in addition to the main functions of the disc brake device as described above, a brake device having a function of the chopped pork used for parking and stopping has been devised.

The disc brake device to which the parking brake device is added is provided with a cylinder 201 in the caliper 200 to which the master cylinder S is connected, as shown in International Publication No. 93-702189 of FIG. 3, and in the cylinder 201. Pads 203 and 204 are fixed to the piston 202 and the disk D which are movably mounted. A parking brake 205 is installed at one side of the caliper 200 to be embedded in the parking brake 205. The gear 207 connected to the motor 206 is screwed to the outer circumferential surface of the piston rod 209 to which the piston 202 is fixed and is fitted to the nut 208 to be fitted.

When the driver presses the brake pedal F to slow or stop the driving speed, the booster B, which is the brake booster, is operated so that the hydraulic pressure generated in the master cylinder S is transferred to the cylinder of the caliper 201 through the hydraulic line. The introduced hydraulic pressure of 201 pushes the piston 3, and the brake pads 203 and 204 hold the disk D, thereby generating a braking force.

As the power is applied to the motor 206 of the parking brake 205 for parking and stopping, the nut 208 is assembled as the gear 207 and the nut 208 connected to the motor 206 rotate. The piston rod 209 is moved in the axial direction and the brake is applied to the piston (203, 204) to hold the disk (D) is configured to operate the parking brake 202.

However, the conventional brake device as described above requires a high processing cost to form a thread to which the nut 208 is coupled to the piston rod 209 for pushing and moving the piston 209.

In order to brake and release the disk, forward and reverse rotation of the motor 206 must be possible, and a separate control device capable of controlling the disk and a device for considering the electric load received by the motor during braking of the disk (D) may be provided. As a result, many required parts have a complicated structure, and the power transmission system is complicated, which results in a poor response.

In addition, since the motor brakes 206 are mounted on the parking brake 1, the appearance (volume) becomes large, and the gap G with the disc is not automatically adjusted when the brake pads 203 and 204 wear out during long-term use. There is a drawback.

In order to solve the problems caused in the conventional disc brake device as described above, the present invention, by improving the structure of the parking brake added to the conventional disc brake device, it is possible to reduce the manufacturing cost by miniaturization and compact weight of components In addition, it is an object of the present invention to provide a brake device that can serve as both a main brake as well as a parking brake as one disc brake device.

To achieve the above object, in the present invention, a disc brake device comprising a pad for fixing a disk to a caliper and a piston for pressing the pad, wherein the latch arm is rotatably inserted into an inner recess of the caliper to allow the latch arm to be rotated. The piston is screwed to one end of the piston and the other end is protruded to the outside of the caliper to assemble the actuating lever connected to the side lever and the cable is assembled to move the piston screwed by the latch arm that rotates with the actuating lever in the axial direction. It is characterized in that it is configured to.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the brake device according to the present invention will be described in detail the configuration and operation effects as follows.

4 is a cross-sectional view for explaining a brake device according to the present invention. In the present invention, the brake pad 2 is installed on the caliper 1 so as to be movable left and right, and a cylinder formed inside the caliper 1 ( The piston 3 is movably installed in 11 so that the piston 3 presses the brake pad 2 by the hydraulic pressure supplied from the master cylinder S to the cylinder 11 of the caliper 1. On the outer circumferential surface of (3), seals 7: 71 and 72 for preventing the fluid from leaking are fixed.

The master cylinder S is connected to the booster B, which is the brake booster, and is operated by the operation of the brake pedal F connected to the booster B.

The recessed part 12 is formed inside the caliper 1 in which the piston 3 is built, and the latch arm 4 is fixed to the recessed part 12 so as to be rotatable.

The latch arm 4 fitted into the recess 12 of the caliper 1 has a thread 41 screwed to the female thread 31 of the piston 3 on one side thereof, and an operating lever 5 on the other side thereof. Rotating plate 42 is assembled and is fixed, and the stepped portion 43 forming a step is provided at the center of the body.

The latch arm 4 fitted in the recess 12 can be rotated by inserting the thread 41 of the latch arm 4 through the recess 12 of the caliper 1 in the left and right directions. The snap ring 44 is installed to be fixed to the recess 12 by the snap ring 44 so that the snap ring 44 is supported and fixed to the stepped portion 43 formed at the center of the latch arm 4.

Thus, even if the piston 3 moves toward the disc D to push the brake pad 2, the latch arm 4 does not move together but only idles in place, so that the piston 3 screwed to the latch arm 4 The braking force that pressurizes the brake pad 2 can be obtained while the linear motion is released little by little from the thread 41.

In the present invention, the piston (3) for pushing the brake pad (2) and the latch arm (4) screwed to the threaded 41 has a constant clearance (C) to press the brake pad (2) ( When releasing the pressure of 3), even if the latch arm 4 is not driven by the restoring force of the seal 7 in the caliper 1, the piston 3 retreats as much as the clearance C formed in the thread 41. Therefore, the brake pad 2 and the disk D can always maintain a constant interval (G).

5 is a cross-sectional view illustrating the internal structure of the operating lever connected to the latch arm which is fitted to the caliper and is rotatably fixed.

As shown in FIG. 5, an internal gear 51 having a gear formed along the inner circumferential surface of the operating lever 5 is installed, and a pair of adjustment arm gears 52 provided with a tooth engaged with the tooth of the internal gear 51. 52 is provided so that one side can rotate with the pin shafts 54 and 54 as a starting point.

The spring 55 is fixedly installed on the operating lever 5 fixed to one side of the caliper 1 so that the operating lever 5 operated by the side lever 6 is initially positioned by the restoring force of the spring 55. To be able to return.

It is inserted so that the rotary plate 42 formed integrally with the latch arm 4 between the adjustment arm gear 53 which is installed to face each other inside the operating lever (5).

The adjustment arm gear 53 is installed in contact with the intermittent arm 57 is installed in the recess 421 of the rotating plate 42, and retains elasticity on the back of the intermittent arm 57 to which the adjustment arm gear 53 abuts. A spring 58 is provided.

The intermittent arm 57 retaining the elasticity of the spring 56 pushes one end of the free end of the adjusting arm gear 53 outwardly to engage the gears of the adjusting arm gears 53 and 53 and the internal gear 51 with each other. It is configured to generate rotational force in only one direction.

The rigidity of the spring 55 fixing the operation lever 5 is made larger than the rigidity of the spring 56 supporting the adjusting arm gear 53.

This is because the actuating lever 5, which is adapted to apply rotational force in only one direction, when the latch arm 4 is reversed, the actuating lever 5 which retains the elasticity of the spring 55 having a large rigidity is stopped by the spring 55. The latch arm 4 connected to the operating lever 5 by releasing the engagement state of the adjustment arm gear 53 which is supported by the spring 58 having a smaller rigidity and is engaged with the internal gear 51. ) Is configured to idle.

Referring to the effects of the present invention configured as described above are as follows.

In the brake device as shown in FIG. 6, when the driver presses the brake pedal F to slow or stop the traveling speed, the booster B, which is the brake booster, operates to operate the master cylinder S. Hydraulic pressure is generated.

The hydraulic pressure generated in the master cylinder S is introduced into the cylinder 11 of the caliper 1 through the hydraulic line, and the hydraulic pressure introduced into the cylinder 11 pushes the piston 3.

Therefore, the piston 3 pushes the inner brake pad 2a and the inner brake pad 2a touches the disk D, and at the same time, the reaction force pushes the housing of the caliper 1 again to the outer brake pad 2b. The braking force is generated by holding the disk D.

At this time, the hydraulic pressure flowing into the cylinder 11 is not leaked to the outside by the seals 7: 71 and 72 provided on the piston 3.

Even though the piston 3 moves toward the disc D to push the brake pad 2, the latch arm 4 supported by the snap ring 44 is only idle in place and is screwed into the latch arm 4 The piston 3 is moved linearly, ie, moved in the axial direction, little by little from the thread 41 to press the brake pad 2.

On the contrary, when the hydraulic pressure of the master cylinder S is released by releasing the brake pedal F, the piston 3 and the caliper 1 return to their original positions by the recovery force of the seal 7 in the caliper 1, and the brake The pads 2a and 2b and the disk D maintain a constant gap G.

When the pressure of the piston 3 pressurizing the brake pad 2 is released, the latch arm 4 may be rotated by the clearance C of the thread even if the latch arm 4 does not rotate due to the recovery force of the seal 7 in the caliper 1. At the same time as the piston 3 returns to its original position, the pad 2 retreats to maintain a constant distance G from the disk D. FIG.

On the other hand, when the brake pad 2 is worn out due to repeated use of the brake device for a long period of time, the gap between the brake pad 2 and the disk D becomes wider, so that the braking effect required for braking the disk D is obtained. In order to achieve the required braking force, the piston 3 must move toward the brake pad 2 in an amount proportional to the amount of wear of the brake pad 2.

In this case, as shown in FIG. 7, the spring 55 supporting the operating lever 5 when the latch arm 4 rotates by the amount the piston 3 advances by the amount worn by the brake pad 2 for disc braking. Stiffness is greater than that of the spring 56 supporting the intermittent arm 57, so that the operating lever 5 does not rotate and the adjustment arm 53 does not rotate the internal gear 51 of the operating lever 5; The pin shaft 54 is rotated from the starting point until all the gears are separated.

As the adjustment arm gear 53 rotates, the intermittent arm 57 abuts on the latch arm 4 is freely rotated while the spring 56 supporting it is compressed and retracted into the recess 421. And the adjustment arm gear 52 is meshed again with the internal gear 51 as the intermittent arm 57 pushes the adjustment arm gear 52 outward when the piston 3 rotates forward and then stops. Pads and disks are adjusted.

When the brake pedal F is pressed in order to apply the brake to the brake device adjusted in this manner, the hydraulic pressure introduced into the cylinder 11 of the caliper 1 pushes the piston 3, and the piston 3 is the brake pad 2. ) So that the braking force of the disc is kept the same.

When the brake pedal is released, the hydraulic pressure generated in the master cylinder (S) disappears, so that the piston (3) is pulled back by the elasticity of the seal (7), and the brake pad (2) releases the disk (D), and the braking is released.

As the piston 3 falls back from the brake pad 2 by the amount of the piston 3 returned by the elasticity of the seal 7, the piston 3 is separated again between the brake pad and the disk D to maintain a constant distance at all times.

On the other hand, as shown in FIG. 8 and FIG. 9, when the side lever 6 is pulled for parking and stopping, the operating lever 5 rotates in proportion to the amount of the cable 61 being pulled.

At this time, since the teeth of the adjusting arm gear 52 are engaged with the internal gear 51 of the operating lever 5 and the adjusting arm gear 52 is in contact with the latch arm 4, the latch arm 4 together with the operating lever 5. The same will be rotated.

As the latch arm 4 rotates, the piston 3 screwed to the thread 41 of the latch arm 4 moves forward to push the brake pad 2, and the brake pad 2 rotates with the wheel. Braking is achieved by using (D) as a noise.

On the contrary, when the side lever 6 is lowered to release the parking brake, the actuating lever 5 and the latch arm 4 are returned to their original state by the restoring force of the spring 55, and the piston 3 is sealed as described above. The brake pad 2 releases the disk D as it is retracted by the elasticity of 7) and the parking brake is released.

Therefore, the brake apparatus of the present invention can perform the functions of the disc brake and the parking brake, and there is an advantage that a constant response can be obtained at all times.

As described above, the present invention improves the structure of the conventional brake device, and can be made compact and lightweight by simplifying the component configuration, thereby significantly reducing the manufacturing cost, as well as the function of the main brake as a disc brake device as well as a parking brake. There is an advantage to be able to perform.

Claims (7)

In a disc brake device comprising a brake pad 2 for fixing a disk D to a caliper 1 and a piston 3 for pressing the brake pad 2, the inner recess of the caliper 1 ( 12) the latch arm 4 is rotatably inserted and installed at one end of the latch arm 4 by engaging the piston 3, and the side lever 6 at the other end of the latch arm 4; Disc brake parking value for a vehicle, characterized in that the assembly is configured to be connected to one end of the operating lever (5) connected by a cable (61). The latch arm (4) according to claim 1, wherein the latch arm (4) forms a screw thread (41) screwed to the female screw (31) of the piston (3) on one side, and the rotating plate (42) fixed to the operating lever (5) on the other side. Each of which is installed, the central portion of the latch arm body to form a step (43) forming a step and the latch arm (4) is a vehicle disc brake parking value, characterized in that is configured by fixed installation with a snap ring (44). 2. The disk brake parking lot value for a vehicle according to claim 1, characterized in that the thread of the latch arm (4) to which the female screw (31) of the piston (3) is coupled has a constant clearance (C). According to claim 2, the actuating lever (5) is to be returned by the restoring force of the spring (55) and inside the actuating lever (5) to install the rotary plate 42 which is integral with the latch arm (4) and the spring ( An intermittent arm 57 having elasticity of 56 is provided with an adjusting arm gear 53 fixed to the pin shaft 53 and the adjusting arm gears 53 and 53 mesh with the internal gear 51. Car disc brake parking lot value. 5. The disc brake parking lot for a vehicle according to claim 4, characterized in that the rigidity of the spring (55) for fixing the actuating lever (5) is greater than the rigidity of the spring (56) for supporting the adjustment arm (53). The disk brake apparatus according to claim 1, further comprising a brake pad (2) for fixing the disk (D) to the caliper (1) and a piston (3) for pressing the brake pad (2). The latch arm 4 is rotatably inserted into the inner recess 12, and one end of the latch arm 4 is connected to the piston 3, and the other end thereof is connected to the side lever 6 and the cable 61. The actuating lever 5 is connected to the internal gear 51 of the actuating lever 5 while the actuating lever 5 is rotated by the actuation of the side lever 6 connected by the cable. The gear is engaged with each other, and the adjustment arm gear 52 operates the latch arm 4 with the thread 41 formed therein and the piston 3 coupled thereto, so that the brake pad 2 rotates together with the wheel D. Disc brake parking value for a vehicle, characterized in that configured to hold and brake. The disc brake apparatus according to claim 1, further comprising a brake pad (2) for fixing the disk (D) to the caliper (1) and a piston (3) for pressing the brake pad (2). The latch arm 4 is rotatably inserted into the inner recess 12 of the rod), and an actuating lever connected to both ends of the latch arm 4 by a piston 3, a side lever 6, and a cable 61. (5) can be connected and the latch arm can move the piston (3) in the direction of the brake pad (2) according to the wear of the brake pad (2) to adjust the distance between the brake pad (2) and the disk (D). And a disc brake parking lot for a vehicle.