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WO2000006434A1 - Accumulateur pour frein hydraulique - Google Patents

Accumulateur pour frein hydraulique Download PDF

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Publication number
WO2000006434A1
WO2000006434A1 PCT/KR1999/000409 KR9900409W WO0006434A1 WO 2000006434 A1 WO2000006434 A1 WO 2000006434A1 KR 9900409 W KR9900409 W KR 9900409W WO 0006434 A1 WO0006434 A1 WO 0006434A1
Authority
WO
WIPO (PCT)
Prior art keywords
accumulator
spring
main body
pressure
elastic valve
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR1999/000409
Other languages
English (en)
Japanese (ja)
Inventor
Moung Kil Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2000006434A1 publication Critical patent/WO2000006434A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/54—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/18—Connection thereof to initiating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/42—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having expanding chambers for controlling pressure, i.e. closed systems

Definitions

  • the present invention relates to an accumulator for a hydraulic brake having a pressure 'cap' piston for receiving a uniform pressure on an elastic valve and a plurality of disks' spring portions having different spring coefficients, and used for a long time.
  • the present invention relates to a hydraulic brake having a function of preventing a brake from tightening even in a wide range of changes in brake oil pressure while having sufficient durability against the brake.
  • this type of brake tightening prevention system includes U.S. Patent Nos. 3,430,660, 4,188,073, 4,571,009, 5,036,879, 5,058,961 No. 5,074,625, etc. are known.
  • These brake tightening prevention systems mount a rubber valve (bulb) between the upper part of the body and the lower part of the body, and the expansion part of the valve is inserted.
  • the brake When the brake is depressed, hydraulic pressure of the brake is transmitted to the hydraulic guide groove of the elastic valve of the accumulator, and the valve is actuated by the pressure. The volume expands toward the arcuate space, and the effect of storing a part of the hydraulic pressure prevents the brake from tightening.
  • U.S. Pat. No. 5,390,989 uses the same elastic valve, but arranges a plurality of disk springs at the lower end of the elastic valve to store hydraulic pressure.
  • a system is disclosed that transmits splits, prevents excessive elastic contraction and expansion, and improves the pressure splitting ability by employing disc * springs.
  • Such a brake tightening prevention system forms a hydraulic guide groove having a conical deep groove in the middle of the upper end of the elastic valve, and expands and contracts around the end of the hydraulic guide groove by hydraulic pressure.
  • excessive stress is applied to this and repeated use results in aging and destruction.
  • Teplon 'coating layer is formed inside the bush to reduce friction, but this Teplon' coating layer repeats expansion and contraction. The coating layer peels off due to friction with the expansion part of the elastic valve. Also, the peeled teplon 'coating is caught between the disc's springs, which has a significant adverse effect on the operation of the brake tightening.
  • the present inventor has conducted intensive studies to solve the above problems, and as a result, has replaced the hydraulic guide portion having the deep groove in the conventional system with a groove of a small hemisphere, Insert pressure 'cap biston on side
  • the problem of the elastic valve is solved by equally dividing the elastic valve stress caused by the hydraulic pressure applied to the elastic valve into the elastic valve. Place and form two disks * spilling part. This makes it possible to vibrate even in a wide range of oil pressure changes, and also to smoothly perform the action of preventing brake tightening even at low pressures and high pressures.
  • FIGS. La and lb are an exploded perspective view and a cross-sectional view showing a fastening state of a conventional hydraulic brake accumulator.
  • the conventional accumulator is composed of an upper part (1) of a main body having a fastening nut (S) and a lower part (2) of a main body having a bolt part (S ') to be fastened to the upper part (1) of the main body.
  • a valve (3) having a hydraulic guide groove (chamber) (3 ′), a support flange (3 ′′), and an expansion part (3 ′′ ′).
  • a brake tightening prevention device having such a structure is provided with a pressure component of an elastic valve.
  • the problem of cracking, the elastic valve being damaged due to repeated expansion and contraction, the use of one spring part composed of multiple disks of the same size, the insensitivity to a wide range of hydraulic changes, and the coating on the inside of the bush There are problems.
  • the present invention solves these various problems, and as shown in the attached FIGS. 2 and 3, forms a pressure 'cap-biston' into which an elastic valve is inserted, and further has a size. A plurality of discs with different springs are arranged.
  • Figure la is an exploded perspective view of a conventional hydraulic brake accumulator.
  • Figure lb is a cross-sectional view c showing the engagement state of a conventional hydraulic accumulator brake
  • FIG. 2 is an exploded perspective view of the hydraulic brake accumulator of the present invention.
  • Figure 3 is a sectional view c showing the engagement state of the accumulator hydraulic brake of the present invention
  • FIG. 2 and FIG. 3 are an exploded perspective view and a sectional view of the hydraulic brake accumulator of the present invention.
  • the upper end of the upper part (7) of the main body has a hollow protrusion (7 ') formed with threads on both the inside and the outside.
  • An air valve (6) is fastened inside (7 ').
  • a cap (5) is screwed in to protect the air valve (6).
  • a thread is formed inside the lower part of the upper part (7) of the main body.
  • the head of the elastic valve (8) is inserted and crimped below the upper part (7) of the main body.
  • a pressure guide groove (19) is formed in the center of the flange (8 ') of the elastic valve (8).
  • a pressure 'cap' button (9) is inserted and crimped from below the elastic valve (8) to evenly distribute the compressive stress of the elastic valve (8). ing.
  • the material of the elastic valve (8) is not particularly limited, but is not particularly limited as long as it is not denatured at a temperature of 100 ° C or more and oil.
  • NBR Nonrile Butadiene Rubber
  • the material of the elastic valve (8) is not particularly limited, but is not particularly limited as long as it is not denatured at a temperature of 100 ° C or more and oil.
  • NBR Nonrile Butadiene Rubber
  • the braking distance also varies.
  • the pressure 'cap' piston (9) has a projection (9 ') formed at the lower end to fix one or more small disc' springs (10) and the small disc 'spring (10) downward.
  • the piston (10) and the disc spring (10) and the piston (11) are kept strong.
  • reference numeral 10 indicates a state of a spring portion where a plurality of small disc'springs are arranged.
  • the disc spring is a known one, meaning that the outer diameter and the inner diameter do not form the same plane, and are arranged in series with each other symmetrically. Therefore, when pressure is applied to the spring due to the difference between the positions of the outer diameter and the inner diameter, the spring has an elastic force.
  • a support plate (12) for securely supporting the small disc's spring (10,), the biston 'ring (11) and the lower large disc' spring (13) is located below the pressure cap 'piston'. Is done.
  • a plurality of the large disc 'springs (13) can be attached, and the number is not particularly limited.
  • Reference numeral 13 indicates a case where a plurality of large disk springs are attached.
  • the large disk spring portion (13 ') By attaching the large disk spring portion (13 ') in this way, it vibrates to a large oil pressure and can sufficiently play a role in preventing brake tightening even in a wide range of oil pressure.
  • a lower safety support plate (14) is arranged below the large disc * spring (13), and the upper end protruding portion of this support plate (14) is inserted into the groove of the large disc 'spring (13). To prevent withdrawal.
  • the attachment of such a support plate (14) causes the large disc 'spring (13) to oscillate, thereby preventing wear and damage on the lower part (16) of the body.
  • the pressure 'cap' button (9), small disc 'spring (10'), piston 'ring (11), upper and lower safety support plates (12) (14), large disc' spring '(13') Maintained firmly in the bush (15) inside the lower part (16) of the body.
  • the material of the bush (15) is not particularly limited, but any material that does not require an inner coating is sufficient.
  • a material having high wear resistance such as a copper alloy or a gold-copper alloy is desirable.
  • the outside of the bush (15) is supported by the lower part (16) of the main body, but the material of the upper part of the main body and the lower part (16) of the main body is not particularly limited as long as a light and durable material can be used. For example, duralumin is desirable.
  • FIG. 3 is a cross-sectional view showing a fastening state of the hydraulic brake accumulator of the present invention.
  • the operating principle of the brake tightening prevention according to the present invention will be described with reference to FIGS.
  • the hydraulic pressure in the master cylinder suddenly rises, causing an instantaneous abnormal high pressure phenomenon with surge (Surge) pressure and shock waves in the brake system fluid.
  • the fluid flows into the vertical channel (18) of the accumulator through the channel (17), and causes vibration in the elastic structure (10 to 14) of the accumulator.
  • the high-pressure fluid first applies pressure to the elastic valve (8) through the hydraulic guide groove (19), and the pressure is increased together with the elastic valve (8) vibrated by the pressure.
  • the cap and biston vibrates together, and this vibration simultaneously vibrates each disk spring, causing a periodic pressure change to the brake oil pressure for a certain period of time, causing the pressure in the fill cylinder to change periodically and the brake This will perform the function of preventing tightening.
  • elastic valves and disc springs have high damping, material and structure. By the way, when they are connected in series, the overall spring coefficient decreases relatively, and when they are applied with hydraulic pressure, they have a spring coefficient that can generate sufficient vibration, and at the same time, are durable against high hydraulic pressure. It has a suitable material and structure.
  • the first spring part reacts and vibrates to small hydraulic pressure
  • the second spring part reacts and vibrates to large hydraulic pressure. It has a structure that can perform the prevention function.
  • Industrial applicability On a dry asphalt road surface, a sudden stop at a speed of 100 km / h indicates that a regular car showed a braking distance of 62 m, while a car equipped with an electronic anti-locking system showed 43 m. When the same experiment was performed with the product according to the present invention installed, the braking distance was 30 m.
  • the brake accumulator of the present invention is easy to attach and detach, very inexpensive, and has excellent durability even when used for a long time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

L'invention concerne un accumulateur permettant de prévenir un blocage de frein, qui présente une durabilité excellente après usage prolongé et permet d'empêcher un blocage de frein de façon suffisante malgré une large gamme de changements de pression d'huile. A cet effet, l'accumulateur est équipé d'un piston (9) à soupape de pression qui permet à une soupape (8) élastique de recevoir une pression d'huile uniforme, et de multiples ressorts (10, 13) présentant différentes constantes de rappel. Un fluide haute pression produit par une augmentation abrupte de la pression d'huile dans le maître-cylindre et dans un cylindre de frein déforme la soupape (8) élastique et des ressorts (10, 13) de disque, après avoir traversé le trajet (18) d'écoulement vertical de l'accumulateur pour permettre de stocker une partie de cette haute pression dans l'accumulateur, ce qui permet de prévenir un blocage de frein.
PCT/KR1999/000409 1998-07-27 1999-07-27 Accumulateur pour frein hydraulique Ceased WO2000006434A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2019980013883U KR200246226Y1 (ko) 1998-07-27 1998-07-27 자동차용브레이크잠김방지장치
KR1998/13883U 1998-07-27

Publications (1)

Publication Number Publication Date
WO2000006434A1 true WO2000006434A1 (fr) 2000-02-10

Family

ID=19536413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1999/000409 Ceased WO2000006434A1 (fr) 1998-07-27 1999-07-27 Accumulateur pour frein hydraulique

Country Status (2)

Country Link
KR (1) KR200246226Y1 (fr)
WO (1) WO2000006434A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757825A (en) * 1971-07-21 1973-09-11 R Givens Pressure equalizing device for fluid pressure systems
US4220376A (en) * 1973-11-28 1980-09-02 Spero Theodore P Pressure equalizing and stabilization device for hydraulic brake systems
US5161864A (en) * 1990-05-07 1992-11-10 Cardenas Richard A Adjustable pressure control device for hydraulic brake systems
US5205309A (en) * 1990-05-07 1993-04-27 Cardenas Richard A Adjustable pressure control device for hydraulic brake systems
US5410945A (en) * 1993-08-17 1995-05-02 Richard Schops Pressure control device
US5425573A (en) * 1993-02-05 1995-06-20 Parallel Ventures Inc. Brake fluid dampening mechanism and system therewith
US5468056A (en) * 1994-11-04 1995-11-21 Kim; Jae C. Auxiliary brake for automobile
US5718488A (en) * 1995-10-26 1998-02-17 Robert Bosch Gmbh Damper for damping fluid oscillations in a hydraulic, slip-controlled motor vehicle brake system
JPH10100889A (ja) * 1996-09-25 1998-04-21 Masato Mino ブレーキシステム流体アキュムレータ

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757825A (en) * 1971-07-21 1973-09-11 R Givens Pressure equalizing device for fluid pressure systems
US4220376A (en) * 1973-11-28 1980-09-02 Spero Theodore P Pressure equalizing and stabilization device for hydraulic brake systems
US5161864A (en) * 1990-05-07 1992-11-10 Cardenas Richard A Adjustable pressure control device for hydraulic brake systems
US5205309A (en) * 1990-05-07 1993-04-27 Cardenas Richard A Adjustable pressure control device for hydraulic brake systems
US5425573A (en) * 1993-02-05 1995-06-20 Parallel Ventures Inc. Brake fluid dampening mechanism and system therewith
US5410945A (en) * 1993-08-17 1995-05-02 Richard Schops Pressure control device
US5468056A (en) * 1994-11-04 1995-11-21 Kim; Jae C. Auxiliary brake for automobile
US5718488A (en) * 1995-10-26 1998-02-17 Robert Bosch Gmbh Damper for damping fluid oscillations in a hydraulic, slip-controlled motor vehicle brake system
JPH10100889A (ja) * 1996-09-25 1998-04-21 Masato Mino ブレーキシステム流体アキュムレータ

Also Published As

Publication number Publication date
KR200246226Y1 (ko) 2001-12-28
KR20000003631U (ko) 2000-02-25

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