KR100444460B1 - disk break structure of vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake structure of a motor vehicle, in which a housing (10) selectively connected to a space (C) between a caliper (1) and a piston (6) in which a brake oil (9) is filled is a caliper (1). It is integrally formed at one side of the space, and the housing 10 has a space for the brake oil 9 by using the pressure difference of the space portion C and the internal pressure of the housing 10 during the replacement operation of the brake pad 5. Oil movement means 20 is installed to move from the portion (C) to the housing 10 or from the housing (10) to the space (C), so that the caliper when replacing the brake pad (5) By replacing the brake oil 9 filled in the space C between the piston 1 and the piston 6 with the housing 10, a replacement operation is performed, thereby providing a brake pad using the lever tool A. FIG. (5) the convenience and efficiency of the work is improved, the lever tool (A) and And prevent a partial damage of the caliper 1 and the brake or a disc (4) which catalyst, as well as after replacement of the brake pads 5 will ensure the prevention of the reduction phenomenon of the braking performance.

Description

Disk break structure of vehicle

The present invention relates to a disc brake structure of a vehicle, and more particularly, to a disc brake structure of a vehicle that can improve the convenience of the operator during replacement work due to wear of the brake pad and prevent partial breakage of the components constituting the brake disc. It is about.

In general, a brake system is classified into a main brake mainly used for driving and a parking brake used for parking a car, and the main brake is configured to brake the hydraulic pressure generated by the operation of the brake pedal. Hydraulic brakes, heavy-duty brakes such as large vehicles, and air brakes for generating braking force by using compressed air pressure. There are disc brakes adapted to brake by hydraulic pressure on both sides of the rotating disk.

Here, the general configuration of the disc brake is shown in Figures 1 and 2, formed in the shape of a cast iron saddle and attached to the caliper (1) attached to the knuckle spindle, respectively attached to both sides of the caliper (1) Two brake cylinders 2, which are attached to the lining and are integrally coupled to the front end of the back plate 3, and the brake pads 5 to be pressed against the brake discs 4 by hydraulic pressure to generate frictional force, The brake pad 5 is pressed against the brake disc 4 to generate a braking force due to frictional force, and the piston 6 is coupled to the piston 6 to form moisture or dust inside the brake cylinder 2. It consists of a cylinder boot (7) and the like to prevent the inflow.

Therefore, when the driver presses the brake pedal, hydraulic pressure is generated in the brake oil, and by this hydraulic pressure, the piston 6 in the brake cylinder 2 is extruded toward the brake disc 4 as shown in FIG. When 5 is extruded toward the brake disc 4, the brake pad 5 is simultaneously pressed into the brake disc 4, which is integrally rotated with the wheel, to generate a braking force due to friction.

On the other hand, the brake pad 5 is gradually worn as shown in Figure 4 according to the number of operation of the brake, the piston 6 is due to the pressure of the brake oil according to the wear degree of the brake pad (5). It protrudes out of the caliper 1.

And, the worker should be replaced with a new one when the brake pad 5 is badly worn, the replacement process is as follows.

That is, when the brake pad 5 is worn according to the number of operation of the brake, the piston 6 protrudes out of the caliper 1 by the pressure of the brake oil 9 as described above with reference to FIG. 4. In this state, since the brake pad 4 cannot be replaced with a new one, the operator inserts a lever tool such as a hammer or spanner into the through hole 1a of the caliper 1 as shown in FIG. One surface of the disk 4 is pressed in the same direction as the arrow shown.

As such, when the operator presses one surface of the brake disc 4 using the lever tool A, the piston 6 is retracted into the caliper 1 again, and the operator is in contact with the brake disc 4. Insert a new brake pad (5) into the space generated between the piston (6) is to be replaced.

Here, when the operator presses one surface of the brake disc 4 using the lever tool A, the operator cancels the pressure of the brake oil 9 to some extent to retract the piston 6 to the inside of the caliper 1. Pressurized by the force, there is a problem that the convenience and workability of the worker worsens due to this series of processes.

In addition, when the operator presses excessively with excessive force when pressing one surface of the brake disc 4 to cancel the pressure of the brake oil (9), the caliper (1) in contact with the lever tool (A) or Another problem is that the brake disc 4 is partially broken and consequently reduces the performance of the brake.

In addition, when the operator presses one surface of the brake disc 4 using the lever tool A, and presses only a specific portion as shown in FIG. 5 without pressing the central portion of the brake disc 4, the brake The phenomenon that the installation position of the disk 4 is eccentric is generated, which causes the wear of the brake pad 5 to reduce the braking effect.

Accordingly, the present invention has been made to solve all the problems described above, by providing a brake fluid storage unit on one side of the caliper to temporarily store the brake oil filled between the caliper and the piston during the replacement of the brake pad, When the operator presses one side of the brake disc using the lever tool, the retraction movement of the piston can be easily performed, thereby improving the convenience and efficiency of the work and the contact of the caliper or the brake disk that is in contact with the lever tool. It is an object of the present invention to provide a disc brake structure of a vehicle that prevents partial breakage in advance and prevents a phenomenon in which brake performance is reduced after replacement of the brake pad.

Disc brake structure of the present invention for achieving the above object, the housing that is selectively connected to the space between the caliper and the piston filled with the brake oil is integrally formed on one side of the caliper, the brake pad in the housing The oil movement means is installed so that the brake oil can be moved from the space portion to the housing or from the housing to the space portion by using the pressure difference between the space portion and the internal pressure of the housing during the replacement operation.

1 and 2 are separated perspective views and combined perspective views for explaining a disc brake generally used;

Figure 3 is a schematic longitudinal cross-sectional view for explaining the operation principle of the disc brake,

Figure 4 and Figure 5 is a longitudinal sectional view for explaining a replacement process during wear of the brake pad according to the conventional structure,

Figure 6 is a longitudinal cross-sectional view for explaining a disk brake provided on one side of the caliper oil moving means according to the present invention;

7 to 12 is a longitudinal cross-sectional view for explaining the replacement operation during wear of the brake pad in accordance with the present invention.

<Description of Symbols for Main Parts of Drawings>

1-Caliper 3-Backplate

4-Brake Disc 5-Brake Pads

6-Piston 9-Brake Oil

10-housing 11-connection port

20-oil moving means 21-valve member

22-First sealing member 23-Piston member

24-Second sealing member 25-Piston rod member

26-Adjust nut 27-Return spring

C-space between caliper and piston

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

6 is a longitudinal sectional view for explaining a disc brake provided on one side of the caliper oil moving means according to the present invention, will be described with the same reference numerals to the same parts as the conventional structure.

As described above with reference to FIGS. 1 and 2, the disc brake structure according to the present invention is formed in a saddle shape of cast iron material and is attached to knuckle spindles, respectively, and on both sides of the caliper 1, respectively. Two brake cylinders 2 to be attached, and a brake pad 5 to which the lining is attached and integrally coupled to the front end of the back plate 3 are compressed to the brake disc 4 by hydraulic pressure to generate frictional force. And a piston (6) which presses the brake pad (5) to the brake disc (4) to generate a braking force due to frictional force, and the piston (6) is coupled to the piston (6) to prevent moisture or moisture from inside the brake cylinder (2). It consists of a cylinder boot (7) and the like to prevent dust from entering.

In addition, the disc brake structure according to the present invention is selectively connected to the space portion (C) between the caliper 1 and the piston 6 filled with the brake oil 9, as shown in Figs. The housing 10 is integrally formed on one side of the caliper 1, and the housing 10 has a pressure difference between the pressure of the space C and an internal pressure of the housing 10 during the replacement of the brake pad 5. By using the oil movement means 20 is installed to move the brake oil (9) from the space (C) to the housing 10 or from the housing (10) to the space (C). have.

Here, the oil moving means 20 is installed on the connection port 11 for connecting the space portion (C) and the housing 10 and selectively opened and closed the valve member 21 and the inside of the housing 10 The piston member 23 is installed to be reciprocally moved along the inner wall surface of the housing 10 while being installed to maintain the airtight via the sealing member 22, and one end thereof is coupled to the piston member 23, and the other end thereof is formed. 2 consists of a piston rod member 25 installed to penetrate the housing 10 having the sealing member 24 interposed therebetween to adjust the amount of movement of the piston member 23 according to the length of the housing 10 protruding from the housing 10. do.

In addition, a screw groove 25a is formed on the outer circumferential surface of the piston rod member 25, and an adjust nut 26 is formed in the screw groove 25a of the piston rod member 25 protruding to the outside of the housing 10. The amount of the proton rod member 25 protruding to the outside of the housing 10 is adjusted according to the amount of rotation of the adjust nut 26, and the amount of movement of the piston member 23 is also adjusted. It is structured.

In addition, a return spring 27 for assisting the return movement of the piston member 23 is installed in the housing 10 such that both ends are supported by the housing 10 and the piston member 23, respectively. The upper end of the return spring 27 has a structure that is supported by being fitted to the spring seat 28 coupled to the bottom of the piston member 23 and the lower end of the return spring 27 is the inner bottom surface of the housing 10 The structure is supported by.

In addition, an upper stopper 29 is formed at the upper side of the inner wall surface of the housing 10 to restrict the upward movement of the piston member 23.

Meanwhile, the brake pad 5 gradually wears out according to the number of times the brake is operated, and the piston 6 protrudes toward the brake disc 4 by the pressure of the brake oil according to the wear degree of the brake pad 5. do.

Therefore, the worker should be replaced with a new one when the brake pad 5 is badly worn, and the replacement of the brake pad 5 will be described in detail with reference to FIGS. 6 to 12.

That is, when the brake pad 5 is badly worn and the piston 6 protrudes a lot toward the brake disc 4 by the pressure of the brake oil 9 as shown in FIG. 7, the operator first adjusts the adjust nut 26. ) Rotates the piston rod member 25 in one direction to protrude outwardly of the housing 10 as shown in FIG. 8 while lowering the piston member 23 toward the inner bottom of the housing 10.

Then, the operator opens the valve member 21 provided on the connection port 11 as shown in Figure 9 to the space (C) between the caliper 1 and the piston 6 and the housing 10 Connect the interior space.

At this time, when the valve member 21 is opened, a large amount of the brake oil 9 filled in the space C is connected due to the relationship between the pressure in the space C being higher than the pressure in the housing 10. The port 11 is moved to a new space in the housing 10, whereby the pressure of the space C is reduced to a constant pressure by the amount of the brake oil 9 reduced.

In this state, the operator inserts a lever tool such as a hammer or spanner A into the through-hole 1a of the caliper 1, as shown in FIG. Pressing in the same direction as the arrow shown.

As such, when the operator presses one surface of the brake disc 4 using the lever tool A, the piston 6 retreats back into the caliper 1 as shown in FIG. Insert a new brake pad (5) into a new space generated between the brake disk (4) and the piston (6) to be replaced.

Here, when the operator presses one surface of the brake disc 4 using the lever tool A, the retreat movement of the piston 6 is easily moved even by the weak pressing force of the operator due to the pressure decrease of the space C. do.

Accordingly, in the state where the brake oil 9 is completely filled in the space C and pressure is not reduced, the one surface of the brake disc 4 is opened using the lever tool A as described above with reference to FIG. 5. Compared to the conventional structure, which was pressurized, the structure according to the present invention can reduce the pressing force of the worker when pressurizing the brake disc 4 using the lever tool A, and retreat the piston 6 even with a weak pressing force. The movement can be easily performed, thereby improving the convenience and efficiency of the work and also preventing the breakage of the caliper 1 or the brake disc 4 in contact with the lever tool A in advance, thereby preventing the brake pads. It is possible to prevent the phenomenon that the brake performance is reduced after the replacement of (5).

On the other hand, after the replacement of the brake pad 5 is completed, the operator rotates the adjust nut 26 in the other direction opposite to the one direction rotated during the replacement of the brake pad 5, the piston rod member 26 and As shown in FIG. 12, the piston member 23 is moved upward by the upper portion of the housing 10.

As a result, most of the brake oil 9 that has been moved to the housing 10 passes through the connection port 11 again due to the pressure increase in the housing 10, thereby providing a space between the caliper 1 and the piston 6. C), the operator then closes the valve member 21 that was opened again to block the space C and the housing 10 from each other.

In addition, the worker presses the brake pedal (not shown) several times to fill the space C with fresh oil as much as the amount of the brake oil 9 leaked when the brake pad 5 is replaced. The replacement work of the pad 5 is completely finished.

As described above, according to the present invention, when the brake pad is replaced, the brake oil, which is filled in the space between the caliper and the piston, is moved to the housing, thereby replacing the brake pad by using the lever tool. The convenience and efficiency of the work is improved during the work, and partial breakage of the caliper or the brake disc in contact with the lever tool is prevented, and the reduction of the brake performance after replacing the brake pad is prevented.

Claims (4)

A housing 10, which is selectively connected to the space C between the caliper 1 and the piston 6 in which the brake oil 9 is filled, is integrally formed on one side of the caliper 1, and the housing ( 10, the brake oil 9 is moved from the space C to the housing 10 by using a difference between the pressure of the space C and the internal pressure of the housing 10 when the brake pad 5 is replaced. Or disc brake structure of a vehicle in which oil moving means 20 is installed to move from the housing 10 to the space portion C. According to claim 1, The oil moving means 20 is installed on the connecting port 11 for connecting the space portion (C) and the housing 10, the valve member 21 and selectively opened and closed, the housing ( The piston member 23 and one end coupled to the piston member 23 are installed to be reciprocally moved along the inner wall surface of the housing 10 while being installed to maintain the airtight via the first sealing member 22 in the 10). And the other end of the piston rod member installed to penetrate the housing 10 having the second sealing member 24 interposed therebetween to adjust the movement amount of the piston member 23 according to the length projecting out of the housing 10. Disc brake structure of the vehicle, characterized in that consisting of 25). According to claim 2, the outer peripheral surface of the piston rod member 25 is formed with a screw groove 25a, the screw groove 25a of the piston rod member 25 protruding to the outside of the housing 10 is adjust Nut 26 is coupled, the disc brake structure of the vehicle, characterized in that the movement amount of the piston member 23 is adjusted according to the rotation amount of the adjust nut (26). According to claim 1 or claim 2, Inside the housing 10, the return spring 27 to assist the return movement of the piston member 23, both ends of the housing 10 and the piston member 23, respectively Disc brake structure of the vehicle, characterized in that installed to be supported.