KR20140059664A - Brake booster - Google Patents

Brake booster Download PDF

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Publication number
KR20140059664A
KR20140059664A KR1020120126344A KR20120126344A KR20140059664A KR 20140059664 A KR20140059664 A KR 20140059664A KR 1020120126344 A KR1020120126344 A KR 1020120126344A KR 20120126344 A KR20120126344 A KR 20120126344A KR 20140059664 A KR20140059664 A KR 20140059664A
Authority
KR
South Korea
Prior art keywords
poppet
valve body
casing
brake booster
pressure chamber
Prior art date
Application number
KR1020120126344A
Other languages
Korean (ko)
Inventor
최익순
Original Assignee
현대모비스 주식회사
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 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020120126344A priority Critical patent/KR20140059664A/en
Publication of KR20140059664A publication Critical patent/KR20140059664A/en

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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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/567—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of the casing or by its strengthening or mounting arrangements
    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
    • F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The present invention relates to a brake booster. The brake booster includes: a casing including a static pressure chamber and a variable pressure chamber sectioned by a diaphragm; a valve body which is coupled to a side of the casing and includes an opening on the surface facing the casing to connect the variable pressure chamber; a protrusion unit which is mounted in the valve boy and protrudes to contact the valve body around the perimeter of the opening; a poppet member including a through hole toward the opening; a pressing member which has an end supported by an input load and another end contacting the poppet member to press the poppet member toward the casing; and a plunger valve which opens or closes the through hole according to the operation of the input load.

Description

Brake Booster {BRAKE BOOSTER}

The present invention relates to a brake booster, and more particularly, to a brake booster capable of improving a contact ratio between a valve body and a poppet member.

A general brake booster is a device that allows a large braking force to be exerted even with a small force by using a pressure difference between a suction pressure of the vehicle engine and an atmospheric pressure.

A typical brake booster generates an output greater than the force applied to the brake pedal when the driver steps on the brake pedal, thereby improving the operating force.

A general brake booster includes a cell having a static pressure chamber and a variable pressure chamber which are partitioned inside and having a front cell and a rear cell sealedly coupled to each other, a valve device for generating a pressure difference in the inside of the cell, And an input shaft for transmitting pressure.

The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2009-0078868 (published on July 21, 2009, entitled "Brake Booster").

In general, the brake booster has a problem that the contact ratio between the poppet member and the valve body is poor and the sealing of the variable pressure chamber is not smoothly performed.

In general, the brake booster is required to secure the flatness of the valve body in order to improve the contact ratio between the poppet member and the valve body. However, there is a problem that the quality dispersion is excessive due to the material and the injection characteristic, .

Therefore, there is a need for improvement.

An object of the present invention is to provide a brake booster in which the contact ratio between the poppet valve and the valve body is improved and the quality thereof is easily controlled.

A brake booster according to one aspect of the present invention includes: a casing having a pressure chamber and a variable pressure chamber, the inside of which is partitioned by a diaphragm; A valve body coupled to one side of the casing and having an opening in a surface facing the casing, the valve body being in communication with the variable pressure chamber; A poppet member which is mounted on the inside of the valve body and has protrusions protruding to be in contact with the valve body along the periphery of the opening, the poppet member having a through hole in the direction of the opening; A pressing member, one side of which is supported by the input rod and the other side of which is in contact with the poppet member so as to press the poppet member in the direction of the casing; And a plunger valve interlocked with the operation of the input rod to open and close the through hole.

In the present invention, the poppet member may include a poppet part formed to be narrower in cross section in the direction of the casing, and having the protrusion contacting the valve body, the poppet part including an elastic material; And a poppet support portion which is fitted to the poppet portion and is pressed and supported in the direction of the opening by the pressing member.

In the present invention, the protruding portion has a constant degree of reduction in cross section while going in the casing direction.

In the present invention, the poppet support portion includes: a plate-shaped poppet support plate surrounding the input rod and press-supported by the pressing member; And a protrusion support portion extending from the poppet support plate toward the protrusion portion.

The brake booster according to the present invention has a protrusion on the outer surface of a poppet member that is in contact with the valve body, thereby improving the contact ratio between the valve body and the poppet member by deformation of the protrusion.

Further, the brake booster according to the present invention has a shape in which the shape of the projecting portion, which is the portion where the poppet portion of the elastic material is in contact with the valve member, narrows toward the valve body. Therefore, even if a small force acts, Can be improved.

Further, the brake booster according to the present invention is configured to press the projection part from the inside of the projection toward the valve body contact surface so as to raise the pressure acting on the projection, thereby improving the contact ratio.

1 is a cross-sectional view of a brake booster according to an embodiment of the present invention.
Fig. 2 is an enlarged view of the portion "A" in Fig.
3 is an operational state diagram of a brake booster according to an embodiment of the present invention.
4 is an enlarged view of the portion "B" in Fig.

Hereinafter, an embodiment of a brake booster according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a cross-sectional view of a brake booster according to an embodiment of the present invention.

1, a brake booster 1 according to an embodiment of the present invention includes a casing 10, a valve body 20, a poppet member 30, a pressing member 40, and a plunger valve 50 .

The casing 10 is partitioned into a static pressure chamber 13 in the front side (left direction in FIG. 1) and a rear side (right side in FIG. 1) in the inside of the casing 10 by the diaphragm 11.

The valve body 20 is coupled to one side of the casing 10 and has an opening 23 in the surface facing the casing 10 to communicate with the variable pressure chamber 15.

The valve body 20 moves in the forward and backward directions in conjunction with the movement of the input rod 70 connected to the brake pedal (not shown). 1) is connected to the brake pedal, the front portion extends to the inside of the valve body 20, and the input rod 70 is moved in a linear path in conjunction with the operation of the brake pedal.

Fig. 2 is an enlarged view of the portion "A" in Fig.

2, the valve body 20 includes a valve body body 21, an opening 23, and a valve body contact portion 25 in this embodiment.

The valve body body portion 21 is located at one side (right side in FIG. 1) of the casing 10 and forms an outer appearance of the valve body 20, and a space is formed inside the valve body body portion 21 so that the input rod 70 can reciprocate .

The opening 23 is located in the direction of the casing 10 of the valve body body 21 and communicates with the variable pressure chamber 15.

The valve body contact portion 25 abuts on the poppet member 30 as a portion corresponding to the rear surface (the right side in FIG. 2) of the portion where the valve body body portion 21 extends inward.

The poppet member 30 is provided on the inner side of the valve body 20 and has protrusions 33 protruding to be in contact with the valve body 20 along the periphery of the opening 23.

In this embodiment, the poppet member 30 includes a poppet portion 31 and a poppet support portion 35.

The poppet portion (31) is seated inside the valve body (20) to close the variable pressure chamber (15) when the driver does not press the brake pedal.

In this embodiment, the poppet portion 31 includes a poppet body 32, a protruding portion 33, and a through hole 34.

The poppet body 32 is seated inside the valve body 20, is supported by the valve body 20, and includes an elastic material.

The projecting portion 33 is formed to protrude in the direction of the valve body contacting portion 25 along the periphery of the opening portion 23.

In this embodiment, the protrusion 33 is formed so as to have a narrowing degree in cross section while going toward the casing 10 (left side in Fig. 2). The projecting portion 33 is deformed in contact with the valve body contact portion 25 to maintain contact with the valve body 20 even if a small force is applied.

The through hole 34 is formed in the face of the poppet body 32 facing the casing 10 so that the inside of the valve body 20 communicates with the variable pressure chamber 15 through the through hole 34. The through hole 34 is closed by the plunger valve 50 when the brake is not operated to prevent the air inside the valve body 20 from moving to the variable pressure chamber 15.

In this embodiment, the poppet support portion 35 includes a poppet support plate 36 and a projection support portion 38.

The poppet support plate 36 surrounds the input rod 70 and is in the shape of a plate pressed and supported by the pressing member 40. The poppet support plate 36 is pressed and supported in the direction of the casing 10 by the pressing member 40 and the protrusion 33 is brought into close contact with the valve body contact portion 25.

The poppet support plate 36 is made of a metal material in order to ensure sufficient rigidity because a load is applied through the pressing member 40 in accordance with the reciprocating motion of the input rod 70.

The protrusion supporting portion 38 has a shape in which the poppet support plate 36 is bent and extended toward the protrusion 33. The protruding portion 33 presses the protruding portion 33 to the valve body contacting portion 25 since the protruding portion 33 has to be kept in contact with the valve body contacting portion 25. The protrusion supporting portion 38 is bent in the direction of the protrusion 33 to strengthen the degree of pressing the protrusion 33 and is integrally formed with the poppet support plate 36.

One side of the pressing member 40 is supported by the input rod 70 and the other side is in contact with the poppet member 30 so as to press the poppet member 30 toward the casing 10. In this embodiment, the pressing member 40 uses a coil spring made of a metal.

The plunger valve 50 opens and closes the through hole 34 in conjunction with the operation of the input rod 70. The plunger valve 50 is connected to the front portion of the input rod 70 and closes the through hole 34 when the brake pedal is not operated to prevent the air in the valve body 20 from moving to the variable pressure chamber 15.

When the input rod 70 moves forward (leftward in FIG. 1), the through hole 34 is opened and the air in the valve body 20 moves to the variable pressure chamber 15 away from the poppet member 30.

3 is an operational state diagram of a brake booster according to an embodiment of the present invention, and Fig. 4 is an enlarged view of a portion "B" in Fig.

Hereinafter, the operation and effects of the brake booster 1 according to the embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG.

When the driver presses the brake pedal, the input rod 70 moves forward (leftward in Fig. 1).

When the driver presses the brake pedal to move the input rod 70 forward, the plunger valve 50 coupled with the input rod 70 is disengaged from the through hole 34 to open the through hole 34.

The atmospheric air inside the valve body 20 passes through the opened through hole 34 and the opening 23 in order to move to the variable pressure chamber 15. [

The diaphragm 11 moves forward (leftward in FIG. 3) when air is introduced into the variable pressure chamber 15 and the pressure rises. By moving the output rod 80 forward with the input rod 70, Thereby amplifying the force acting on the piston 70.

When the driver releases the force acting on the brake pedal, the input rod 70 is restored by the restoring force of the pressing member 40 or the like.

The plunger valve 50 connected to the input rod 70 moves to the rear side (right side in FIG. 3) and closes the through hole 34 so that the air inside the valve body 20 is moved to the variable pressure chamber 15 Stop.

The brake booster according to the present invention has a protrusion on the outer surface of a poppet member that is in contact with the valve body, thereby improving the contact ratio between the valve body and the poppet member by deformation of the protrusion.

Further, the brake booster according to the present invention has a shape in which the shape of the projecting portion, which is the portion where the poppet portion of the elastic material is in contact with the valve member, narrows toward the valve body. Therefore, even if a small force acts, Can be improved.

Further, the brake booster according to the present invention is configured to press the projection part from the inside of the projection toward the valve body contact surface so as to raise the pressure acting on the projection, thereby improving the contact ratio.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

1: Brake booster 10: Casing
11: diaphragm 13: static pressure chamber
15: Transformer chamber 20: Valve body
21: valve body body part 23: opening
25: valve body contact portion 30: poppet member
31: Poppet part 32: Poppet part body
33: protrusion 34: through hole
35: Poppet support part 36: Poppet support plate
38: projection supporting portion 40: pressing member
50: plunger valve 70: input rod
80: Output Load

Claims (4)

A casing having a constant pressure chamber and a variable pressure chamber in which the diaphragm is partitioned by the casing;
A valve body coupled to one side of the casing and having an opening in a surface facing the casing, the valve body being in communication with the variable pressure chamber;
A poppet member which is mounted on the inside of the valve body and has protrusions protruding to be in contact with the valve body along the periphery of the opening, the poppet member having a through hole in the direction of the opening;
A pressing member, one side of which is supported by the input rod and the other side of which is in contact with the poppet member so as to press the poppet member in the direction of the casing; And
A plunger valve interlocking with the operation of the input rod to open and close the through hole;
And a brake booster.
The method according to claim 1,
The poppet member
A poppet portion having a protruding portion formed to be narrower in cross section in the casing direction and in contact with the valve body, the poppet portion including an elastic material; And
A poppet support portion fitted to the poppet portion and pressed and supported in the direction of the opening by the pressing member;
And a brake booster.
3. The method of claim 2,
The protruding portion
Wherein a degree of reduction of the cross section of the brake booster is constant in the direction of the casing.
4. The method according to claim 2 or 3,
The poppet-
A poppet support plate surrounding the input rod and press-supported by the pressing member; And
A protrusion supporting portion having a shape extending from the poppet support plate toward the protrusion portion;
And a brake booster.


KR1020120126344A 2012-11-08 2012-11-08 Brake booster KR20140059664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120126344A KR20140059664A (en) 2012-11-08 2012-11-08 Brake booster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120126344A KR20140059664A (en) 2012-11-08 2012-11-08 Brake booster

Publications (1)

Publication Number Publication Date
KR20140059664A true KR20140059664A (en) 2014-05-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120126344A KR20140059664A (en) 2012-11-08 2012-11-08 Brake booster

Country Status (1)

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KR (1) KR20140059664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190108355A (en) * 2018-03-14 2019-09-24 현대모비스 주식회사 Brake booster for vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190108355A (en) * 2018-03-14 2019-09-24 현대모비스 주식회사 Brake booster for vehicle

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