KR20090088650A - Disc brake - Google Patents

Disc brake Download PDF

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Publication number
KR20090088650A
KR20090088650A KR1020080014062A KR20080014062A KR20090088650A KR 20090088650 A KR20090088650 A KR 20090088650A KR 1020080014062 A KR1020080014062 A KR 1020080014062A KR 20080014062 A KR20080014062 A KR 20080014062A KR 20090088650 A KR20090088650 A KR 20090088650A
Authority
KR
South Korea
Prior art keywords
seal
groove
cylinder
boot
piston
Prior art date
Application number
KR1020080014062A
Other languages
Korean (ko)
Inventor
김성환
Original Assignee
주식회사 만도
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020080014062A priority Critical patent/KR20090088650A/en
Publication of KR20090088650A publication Critical patent/KR20090088650A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/02—Fluid pressure
    • F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/04—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/08—Seals, e.g. piston seals

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

A disk brake is provided to simplify a process and an assembly by processing a seal groove and a boot groove at the same time. A disk brake includes a caliper housing, a piston(20), and a seal-boot. A cylinder is formed in the caliper housing. The piston is moved in the cylinder. The seal-boot is formed by integrating a seal(81) and a boot(82). The seal prevents leakage of oil between the cylinder and the piston. The boot prevents an inflow of dust. An assembly process of the boot and the seal is simplified by the integrated seal-boot.

Description

DISC BRAKE}

The present invention relates to a disc brake, and more particularly, to a disc brake in which a seal groove and a butt groove are installed in a cylinder in which a piston reciprocates, respectively.

BACKGROUND In general, a brake mounted on a vehicle is a device for decelerating a vehicle while driving or maintaining a stopped or stopped state, and includes a drum brake and a disc brake. Such a disc brake obtains a braking force by strongly pressing a disk rotating with a wheel instead of a drum to a pad on both sides, and FIG. 1 shows a conventional disc brake.

1 is a side cross-sectional view schematically showing a disc brake according to the related art.

As shown in FIG. 1, a conventional disc brake has a caliper housing 1 having a piston 2 built therein to move forward and backward by braking hydraulic pressure, and is fixed to a vehicle body, and both ends of the caliper housing 1 are guide rods (not shown). A carrier (not shown) slidably mounted through the circumference and a disk 3 rotating together with the wheel while a part of the outer circumference is inserted between the pair of plates 4 and 5.

The carrier is mounted to the knuckle of the vehicle body via bolts, in which a pair of plates 4 and 5 are slidably mounted toward the disk 3 side, respectively. The pair of plates 4 and 5 have inner pads 4a attached thereto, and are in contact with the inner plate 4 and the inner surface of the finger portion 6, which are directly in contact with the tip of the piston 2 to receive pressure. The outer plate 5 is arranged and attached to the outer pad 5a.

And the caliper housing (1) is provided with a cylinder (7), which is provided in the rear portion so that the braking hydraulic pressure is transmitted, and the bent portion (6) wrapped around the outer plate (5), which will be described later, In the braking operation, the pair of pad plates 4 and 5 are pushed toward the disk 3.

In addition, a seal 8 is installed on the inner circumference of the cylinder 7 to apply a restoring force to the piston 2, and a booth made of a rubber material to prevent foreign matter from entering the inlet of the cylinder 7. 9) is arranged. In order to install the seal 8 and the butt 9, the seal groove 8a and the butt groove 9a are machined in the inner wall of the cylinder 7 in a circumferential direction. Therefore, when the driver presses the brake pedal (not shown) and the braking hydraulic pressure generated from the master cylinder (not shown) is transmitted to the cylinder 7, the piston 2 moves forward in the direction of the arrow A, and the inner pad of the inner plate 4 is carried out. 4a is momentarily compressed on one side of the disk 3 which rotates with the wheel.

In addition, since the hydraulic pressure is present inside the cylinder 7, the caliper housing 1 moves in the direction of arrow B, whereby the finger portion 6 pulls the outer plate 5 to the outer pad 5a attached thereto. Is pressed against the other side of the disk 3 to exert a braking force. At this time, since the seal 8 is elastically deformed while being in close contact with the outer periphery of the piston 2, oil is prevented from leaking and at the same time, a restoring force is applied to the piston 2 when the braking action is released.

However, in the conventional disc brake cylinder 7 structure, the inner wall of the cylinder 7 is processed to form the seal groove 8a and the butt groove 9a in order to install the seal 8 and the butt 9. That is, after the cylinder 7 is machined in the forged molded caliper housing 1 in the manufacturing process of the disc brake, the cylinder 7 is formed by forming the seal groove 8a through cutting the wall of the cylinder 7 again. The wall surface is processed again to form the butt groove 9a. Thereafter, during the assembly process of the disc brake, the seal 8 is inserted into the seal groove 8a, and the oot 9 is inserted into the boot groove 9a.

Accordingly, the seal groove 8a and the butt groove 9a should be separated and processed twice in the process of machining the wall of the cylinder 7, and the seal 8 and the bootut 9 are separately inserted during the assembly process. As it should be put, the productivity is greatly reduced, and this causes a rise in manufacturing cost.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide a disc brake that can simplify the processing and assembly by communicating the seal groove and the boot groove at the same time processing the seal groove and the boot groove. It is to.

In order to achieve the above object, the disc brake according to the present invention includes a caliper housing in which a cylinder is formed, a piston which is built in the cylinder so as to move forward and backward, a seal which prevents oil leakage between the cylinder and the piston, and dust In the disc brake having a boot to prevent the inflow of the seal, the seal and the boot and the boot and the booth comprises a seal-boot is formed integrally so that the assembly can be simplified during the assembly process It is done.

In addition, the seal groove is formed on one side of the seal-butt is formed integrally; and the butt groove is mounted on the other side; and the seal groove and the butt groove so that the processing can be simplified when forging And a seal-butt groove for communicating the seal groove and the butt groove with each other.

And the seal-butt groove is simultaneously processed with the seal groove and the butt groove.

Through the above configuration, the disc brake according to the present invention can form a seal-but groove to simultaneously process the seal groove and the butt groove, thereby reducing the processing cost and processing time.

In addition, by providing a seal-boot formed integrally, the number of parts can be reduced to reduce costs, and the assembly process can be simplified to shorten the assembly time.

Hereinafter, a preferred embodiment of the disc brake according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross sectional view of the disc brake according to the present invention, and FIG. 3 is a sectional view taken along line III-III of FIG.

As shown in Figures 2 and 3, the disc brake according to the present invention is a caliper housing 10, the piston 20 is built in to move forward and backward by braking hydraulic pressure, and a pair of plates 50, 60 Carrier 30 is installed at a predetermined interval and a portion of the outer periphery is inserted between the plate 50, 60 includes a disk-shaped disk 70 that rotates with the wheel (not shown) of the vehicle.

The carrier 30 is firmly fixed to the knuckle (not shown) of the vehicle body through a mounting bolt, and a pair of plates 50 and 60 to which the pads 51 and 61 are attached is centered on the disk 70. It is installed to move forward and backward. The pair of plates 50 and 60 are arranged to be in contact with the tip of the piston 20, and are arranged to be in contact with the inner plate 50 to which the inner pad 51 is attached and the inner side of the finger part 12 to be described later. And an outer plate 60 to which an outer pad 61 is attached.

The caliper housing 10 has a cylinder 11 in which the piston 20 is embedded, a finger portion 12 for operating the outer plate 60, and a connection between the finger portion 12 and the cylinder 11. It is defined as a bridge portion 13 for. The cylinder 11 is processed on one side of the caliper housing 10 so that the braking hydraulic pressure formed in the master cylinder (not shown) is transferred, and the finger portion 12 surrounds the outer pad plate 60. It is molded to bend downward from the other side of the. Both ends of the caliper housing 10 are slidably coupled to both ends of the carrier 30 through guide rods 40.

In addition, a seal 81 is provided on the inner circumference of the cylinder 11 to impart an elastic force in the direction of restoring the piston 20 while preventing oil leak in a gap between the outer circumference of the piston 20. The inner circumference of the cylinder 11 is provided with a boot 82 for preventing dust or the like from flowing into the gap between the outer circumference of the piston 20. At this time, the seal 81 and the oot 82 are provided as a seal-boot 80 formed integrally.

4 is an enlarged cross-sectional view illustrating a cylinder inner wall structure in which a seal and a oot according to the present invention are installed.

As shown in FIG. 4, the seal-butt groove 83 must be formed on the inner wall of the cylinder 11 so that the integrally formed seal 81 and the oot 82 are simultaneously installed on the inner wall of the cylinder 11. . The inner wall of the cylinder 11 is formed with a seal groove 81a on which the seal 81 side of the seal-butt 80 formed integrally is mounted, and the butt 82 side of the seal-butt 80 is mounted. A booth groove 82a is formed, and a seal-boot groove 83 for communicating the seal groove 81a and the booth groove 82a is formed. That is, since the seal-butt groove 83 is formed between the seal groove 81a and the butt groove 82a, the seal groove 81a, the butt groove 82a, and the seal-butt groove 83 are simultaneously processed. It can be. Thus, after the caliper housing 10 is forged, the seal-butt 80, which is integrally formed by simultaneously machining the seal groove 81a, the butt groove 82a, and the seal-but groove 83 at the same time, is fitted. It can be.

Accordingly, a separate processing process for separately installing the seal 81 and the oot 82 is not required, thereby simplifying the manufacturing process of the caliper housing 10 and improving productivity.

Next, the operation of the disc brake according to the present invention configured as described above will be described.

When the brake pedal is pressed while the vehicle is running, a braking hydraulic pressure is formed in the master cylinder, which is transmitted to the cylinder 11, and the piston 20 is advanced in the arrow A direction (see FIG. 3). Accordingly, the braking force is generated by friction of the pad 51 on one side of the disk 70 that rotates while the inner plate 50 moves forward.

In addition, the caliper housing 10 moves in the direction of arrow B (refer FIG. 3) by the hydraulic pressure remaining in the cylinder 11, whereby the finger part 12 pulls the outer plate 60 and its pad 61 ), The pressing braking force is generated on the other side of the disk 70. At this time, the seal 81 of the seal-butt 80 is elastically deformed while maintaining the state in close contact with the outer periphery of the piston 20, thereby preventing oil leakage between the cylinder 11 and the piston 20. And impart elastic restoring force to the piston 20.

When the brake hydraulic pressure is released by releasing the brake pedal, each of the pads 51 and 61 is spaced apart again by friction with the disk 70 that rotates together with the wheel, and at the same time, the piston 20 is also restored to the cylinder 11. . At this time, the piston 20 is restored faster by the elastically deformed seal 81, thereby preventing unnecessary wear of the pads 51 and 61.

1 is a side cross-sectional view schematically showing a disc brake according to the related art.

2 is a cross sectional plan view of a disc brake according to the present invention;

 3 is a cross-sectional view taken along line III-III of FIG. 2, and is a side cross-sectional view of the disc brake according to the present invention.

4 is a cross-sectional view showing a cylinder inner wall structure in which a seal and a oot according to the present invention are installed.

* Description of the symbols for the main parts of the drawings *

10: Caliper Housing 11: Cylinder

20: piston 80: seal-boot

81: seal 81a: seal home

82: bout 82a: bouthome

83: seal-bute groove

Claims (3)

A disc brake having a caliper housing with a cylinder, a piston built in the cylinder so as to move forward and backward, a seal for preventing oil from leaking between the cylinder and the piston, and a oot for preventing dust from entering. To And a seal-boot that includes a seal-boot formed integrally so that assembly can be simplified during the assembly process of the seal and the boot. The method of claim 1, And a seal groove in which one side of the seal-butt formed integrally is mounted; and a boot groove in which the other side is mounted; and the seal groove and the boot groove are the seal so that processing can be simplified during forging. And a seal-butt groove for communicating a groove and the butt groove with each other. The method of claim 2, And the seal-butt groove is simultaneously processed with the seal groove and the butt groove.
KR1020080014062A 2008-02-15 2008-02-15 Disc brake KR20090088650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080014062A KR20090088650A (en) 2008-02-15 2008-02-15 Disc brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080014062A KR20090088650A (en) 2008-02-15 2008-02-15 Disc brake

Publications (1)

Publication Number Publication Date
KR20090088650A true KR20090088650A (en) 2009-08-20

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ID=41207211

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080014062A KR20090088650A (en) 2008-02-15 2008-02-15 Disc brake

Country Status (1)

Country Link
KR (1) KR20090088650A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108603551A (en) * 2016-02-10 2018-09-28 Ntn株式会社 Electrical braking device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108603551A (en) * 2016-02-10 2018-09-28 Ntn株式会社 Electrical braking device

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Date Code Title Description
A201 Request for examination
E601 Decision to refuse application