CN202728211U - Vacuum booster - Google Patents
Vacuum booster Download PDFInfo
- Publication number
- CN202728211U CN202728211U CN 201220371454 CN201220371454U CN202728211U CN 202728211 U CN202728211 U CN 202728211U CN 201220371454 CN201220371454 CN 201220371454 CN 201220371454 U CN201220371454 U CN 201220371454U CN 202728211 U CN202728211 U CN 202728211U
- Authority
- CN
- China
- Prior art keywords
- push rod
- piston body
- control cock
- vacuum booster
- front case
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Braking Systems And Boosters (AREA)
Abstract
The utility model provides a vacuum booster, belongs to the field of automotive brake technique, and resolves the problems that an existing vacuum booster is not ideal to brake, and the like. The vacuum booster comprises a front shell and a rear shell which is fixedly connected with the front shell, the front shell is fixedly connected with a vacuum elbow used for being connected with an air inlet pipe, the center of the rear shell is provided with an input force push rod in penetrated mode, the input force push rod is provided with a control valve assembly which is placed between the input force push rod and the rear shell, and the inner end of the input force push rod is fixedly connected with an air valve seat. The control valve assembly comprises a control valve, the input force push rod is connected with a piston body which penetrates into the rear shell, an output force push rod is fixed at the center of the inner end of the piston body, the input force push rod and the output force push rod are arranged in coaxial mode, the output force push rod is placed inside the front shell, the center of the front shell is fixedly connected with a rubber top block in the axially extending direction of the output force push rod, and a brake distance is arranged between the rubber top block and the output force push rod. The vacuum booster has the advantages of being good in seal effect, long in service life and the like.
Description
Technical field
The utility model belongs to the automobile brake technical field, relates to a kind of vacuum booster unit, particularly the vacuum booster used of a kind of automobile brake system.
Background technology
Vacuum booster is the brake power assist unit in the brake system of car, be the critical component in the brake system of car, its inside has a middle part that the diaphragm of push rod is housed, and cavity is separated into two parts, a part communicates with atmosphere, and another part links to each other with engine air inlet tube by pipeline.During its work, the principle of air amount when utilizing engine operation, cause a side cavity of vacuum booster to form vacuum, it is poor that this chamber will mineralization pressure with respect to another chamber normal air, even this difference of pressure is very little, but because the area of diaphragm is larger, still can produces very large thrust and promote diaphragm to vacuum one lateral movement, utilize difference of pressure to strengthen retrothrust.
The patent of vacuum booster application is very many, and for example the Chinese patent literature data discloses a kind of vacuum booster [application number: 200620086464.X; Granted publication number: CN200948792Y], it comprises control valve body, be installed in control cock push rod and control cock plunger on the control valve body, the tail end of control valve body is installed with the front case assembly, the rear housing assembly of captiveing joint with the front case assembly, braking return diaphragm, counter-force dish, diaphragm return spring, master cylinder push rod, check valve are installed between front case assembly and the rear housing assembly, braking return diaphragm and front case assembly form ante-chamber, form back cavity with the rear housing assembly, and two passages that can be communicated with ante-chamber and back cavity are arranged on the control valve body.
Above-mentioned patent is by arranging two passages, can make air Fast Filling back cavity, improved the being quick on the draw property of servo-unit, but its master cylinder push rod passes the front case assembly, the such poor sealing between master cylinder push rod and the front case assembly, the degree of vacuum of ante-chamber during the impact braking is so that braking effect is undesirable.
Summary of the invention
The purpose of this utility model is for the above-mentioned problems in the prior art, and the vacuum booster of a kind of good airproof performance, good braking effect is provided.
The purpose of this utility model can realize by following technical proposal: a kind of vacuum booster, comprise front case and the rear housing that is connected with front case, described front case is fixed with the vacuum elbow that is connected for air inlet pipe, described rear housing center is equipped with the Input Forces push rod, described Input Forces push rod is provided with control cock assembly between Input Forces push rod and rear housing and the inner of Input Forces push rod is fixed with air valve base, the control cock assembly comprises control cock, described Input Forces push rod is connected with the piston body that penetrates rear housing, the inner center of described piston body is fixed with the output force pushing bar with the coaxial setting of Input Forces push rod, the inner center of described piston body also is fixed with the reaction plate between output force pushing bar and air valve base, be fixed with the piston body pull back spring that makes the piston body return in the described front case, be fixed with between described front case and the rear housing the separated diaphragm of the chamber between front case and the rear housing, has communicating passage on the described piston body, it is characterized in that, described output force pushing bar is positioned at front case, the front case center is fixed with the rubber jacking block that extends axially direction in output force pushing bar, has the brake cabin distance between described rubber jacking block and the output force pushing bar.
This vacuum servo-unit has guaranteed the leak tightness of chamber by arranging of rubber jacking block, and the degree of vacuum of ante-chamber when guaranteeing to brake is so that good braking effect.
In above-mentioned a kind of vacuum booster, described rubber jacking block is mutually bonding with front case.Joint strenght by adhesive rubber jacking block and front case is good, and the installation of rubber jacking block location is convenient.
In above-mentioned a kind of vacuum booster, described piston body the inner is fixed with spring perch, described output force pushing bar one end is embedded in the spring perch, and an end of described piston body pull back spring acts on the front case, and the other end of piston body pull back spring acts on the spring perch.The installation that makes things convenient for piston body pull back spring and output force pushing bar that arranges of spring perch is located.
In above-mentioned a kind of vacuum booster, described diaphragm comprises front diaphragm and rear film, front diaphragm and rear film are separated into three chambers with the chamber between front case and the rear housing, chamber between front case and the front diaphragm is ante-chamber, chamber between front diaphragm and the rear film is middle separate space, chamber between rear film and the rear housing is back cavity, have between the first passage, piston body that communicating passage comprises that the inner place of piston body has can be communicated with back cavity and control cock and the spring perch can be communicated with in the second channel of separate space and first passage.
In above-mentioned a kind of vacuum booster, be fixed with on the described spring perch for the front diaphragm dish that supports front diaphragm with for the rear film dish that supports rear film.Front diaphragm dish and rear film dish play the supporting and location effect to front diaphragm and rear film respectively, have prolonged the service life of front diaphragm and rear film, and front diaphragm and rear film installation location convenience.
In above-mentioned a kind of vacuum booster, described rear housing is fixed with the dust boot that the piston body outer end is shrouded.Dust boot prevents that airborne dust from entering into the inside of vacuum booster, prolonged service life.
In above-mentioned a kind of vacuum booster, described dust boot has a circle perforate, and dust boot is fixed with the foam filter of the ring-type that perforate is covered.Foam filter plays a role in filtering, and guarantees that clean air enters into vacuum booster inside.
In above-mentioned a kind of vacuum booster, the contact position of described rear housing and piston body is fixed with seal ring.
In above-mentioned a kind of vacuum booster, described control cock assembly comprises control cock, control cock deck and the control valve spring between control cock deck and control cock, described control cock deck is clamped in the piston body inwall, described control cock one end is resisted against air valve base, and the control cock other end is resisted against the control cock deck.
In above-mentioned a kind of vacuum booster, be provided with Input Forces push rod pull back spring between described control cock deck and the dust boot, one end of described Input Forces push rod pull back spring acts on the control cock deck, and the other end of Input Forces push rod pull back spring acts on the dust boot inboard.
Compared with prior art, this vacuum servo-unit has guaranteed the leak tightness of ante-chamber by arranging of rubber jacking block, the degree of vacuum of ante-chamber when guaranteeing to brake, so that good braking effect, and by front diaphragm and rear film the chamber between front case and the rear housing is separated into ante-chamber, middle separate space and back cavity, increased the brake boost ratio, alleviated the operation labour intensity of chaufeur, reduce the stopping distance of automobile, improved the sensitivity of braking, be applicable to the heavier automobile brake of quality, front diaphragm and rear film are better than single diaphragm bearing capacity in addition, have improved service life.
Description of drawings
Fig. 1 is the structure cross-sectional schematic of this vacuum servo-unit.
Among the figure, 1, front case; 2, rear housing; 3, vacuum elbow; 4, Input Forces push rod; 5, air valve base; 6, piston body; 7, output force pushing bar; 8, reaction plate; 9, piston body pull back spring; 10, rubber jacking block; 11, spring perch; 12, front diaphragm; 13, rear film; 14, ante-chamber; 15, middle separate space; 16, back cavity; 17, first passage; 18, second channel; 19, front diaphragm dish; 20, rear film dish; 21, dust boot; 22, foam filter; 23, seal ring; 24, control cock; 25, control cock deck; 26, control valve spring; 27, Input Forces push rod pull back spring.
The specific embodiment
Below be specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
As shown in Figure 1, this vacuum servo-unit comprises front case 1 and the rear housing 2 that is connected with front case 1, front case 1 is fixed with for the vacuum elbow 3 that is connected with air inlet pipe, rear housing 2 centers are equipped with Input Forces push rod 4, Input Forces push rod 4 is provided with control cock assembly between Input Forces push rod 4 and rear housing 2 and the inner of Input Forces push rod 4 is fixed with air valve base 5, the control cock assembly comprises control cock 24, control cock deck 25 and the control valve spring 26 between control cock deck 25 and control cock 24, described control cock deck 25 is clamped in piston body 6 inwalls, described control cock 24 1 ends are resisted against air valve base 5, and control cock 24 other ends are resisted against control cock deck 25.Input Forces push rod 4 is connected with the piston body 6 that penetrates rear housing 2, and the contact position of rear housing 2 and piston body 6 is fixed with seal ring 23.Piston body 6 inner centers are fixed with the output force pushing bar 7 with the 4 coaxial settings of Input Forces push rod, piston body 6 inner centers also are fixed with the reaction plate 8 between output force pushing bar 7 and air valve base 5, be fixed with the piston body pull back spring 9 that makes piston body 6 returns in the front case 1, piston body 6 the inners are fixed with spring perch 11, output force pushing bar 7 one ends are embedded in the spring perch 11, one end of piston body pull back spring 9 acts on the front case 1, and the other end of piston body pull back spring 9 acts on the spring perch 11.
Be fixed with between front case 1 and the rear housing 2 the separated diaphragm of chamber between front case 1 and the rear housing 2, diaphragm comprises front diaphragm 12 and rear film 13, front diaphragm 12 and rear film 13 are separated into three chambers with the chamber between front case 1 and the rear housing 2, chamber between front case 1 and the front diaphragm 12 is ante-chamber 14, chamber between front diaphragm 12 and the rear film 13 is middle separate space 15, chamber between rear film 13 and the rear housing 2 is back cavity 16, is fixed with on the spring perch 11 for the front diaphragm dish 19 that supports front diaphragm 12 with for the rear film dish 20 that supports rear film 13.Have communicating passage on the piston body 6, have between the first passage 17, piston body 6 that communicating passage comprises that the inner place of piston body 6 has can be communicated with back cavity 16 and control cock 24 and the spring perch 11 can be communicated with in the second channel 18 of separate space 15 and first passage 17.Output force pushing bar 7 is positioned at front case 1, front case 1 center is fixed with the rubber jacking block 10 that extends axially direction in output force pushing bar 7, having the brake cabin distance between rubber jacking block 10 and the output force pushing bar 7, originally is that rubber jacking block 10 is mutually bonding with front case 1 among the embodiment.
This vacuum servo-unit is under off working state, Input Forces push rod pull back spring 27 promotes Input Forces push rod 4 to breaking away from rear housing 2 directions, until piston body 6 is resisted against rear housing 2 inwalls, vacuum valve is in opening, control valve spring 26 makes control cock 24 and air valve base 5 close contacts, thereby closed the air valve port, middle separate space 15, the back cavity 16 of vacuum booster were connected through control cock 24 places by first passage 17 and second channel 18 respectively, and were isolated with ambient atmosphere this moment.The ante-chamber 14 of this vacuum servo-unit communicates with air inlet pipe through vacuum elbow 3, utilizes the suction of the degree of vacuum of engine air inlet tube to produce power-assisted during braking.
This vacuum servo-unit working process and principle are as follows: during braking, brake pedal is depressed by chaufeur, treadle effort acts on the Input Forces push rod 4 through behind the lever amplification, at first, Input Forces push rod pull back spring 27 is compressed, Input Forces push rod 4 moves to front case 1 direction together with air valve base 5, this moment, front diaphragm dish 19 and rear film dish 20 maintained static, when air valve base 5 moves to control cock 24 with the contacted position of vacuum valve, vacuum valve cuts out, this moment ante-chamber 14, middle separate space 15 and back cavity 16 are separated, Input Forces push rod 4 continues to move to choker relief valve and is about to the open place, be the balance position of vacuum booster when boosting, this moment, air valve base 5 ends just contacted with reaction plate 8 herein.Along with Input Forces push rod 4 continues mobile, choker relief valve is opened, piston body 6 moves with Input Forces push rod 4, air valve port by opening after ambient atmosphere is filtered through foam filter 22 like this, first passage 17 and second channel 18 enter into back cavity 16 and separate space 15, servo force produces, along with entering of air, front diaphragm 12 and rear film 13 are owing to difference of pressure produces thrust, this thrust is by front diaphragm dish 19, rear film dish 20 and reaction plate 8 promote output force pushing bar 7 and move, this moment, the application force of output force pushing bar 7 was treadle effort, front diaphragm 12 and rear film 13 produce the summation of thrust, but front diaphragm 12 and rear film 13 produce thrust much larger than treadle effort, because the material of reaction plate 8 requires the stressed surface equal characteristic of pressure everywhere, increase so that servo force forms fixed proportion (servo force ratio) with the gradually increase of the Input Forces of Input Forces push rod 4, thereby have good carry-on property when making braking and handle sense.Because the finiteness of servo force resource, when reaching maximal servo power, when the degree of vacuum that is back cavity 16 is zero, servo force will become a constant, this moment, Input Forces and the power output of vacuum booster increased equivalent, output force pushing bar 7 moves to rubber jacking block 10, until contact rubber jacking block 10,10 deformation of rubber jacking block contact brake master cylinder piston.After the cancellation braking, along with reducing of Input Forces, Input Forces push rod 4 is return under the effect of Input Forces push rod pull back spring 27, when reaching Max point of booster force, choker relief valve is just closed, along with Input Forces continue reduce, vacuum valve will be in the state of be about to opening, the balance position when being the vacuum booster step-down herein, after vacuum valve is opened, middle separate space 15 and back cavity 16 are connected, and the degree of vacuum of middle separate space 15 and back cavity 16 descends, and servo force reduces, piston body 6 moves return to breaking away from rear housing 2 directions under the effect of piston body pull back spring 9, output force pushing bar 7 is resetted, and rubber jacking block 10 restores to the original state, and vacuum valve cuts out again, vacuum booster reaches transient equilibrium, along with the reducing gradually of Input Forces, servo force also will become reducing of fixed proportion like this, until braking is fully phased out.
This vacuum servo-unit has guaranteed the leak tightness of ante-chamber 14 by arranging of rubber jacking block 10, the degree of vacuum of ante-chamber 14 when guaranteeing to brake, so that good braking effect, and by front diaphragm 12 and rear film 13 chamber between front case 1 and the rear housing 2 is separated into ante-chamber 14, middle separate space 15 and back cavity 16, increase the brake boost ratio, alleviated the operation labour intensity of chaufeur, reduced the stopping distance of automobile, improve the sensitivity of braking, be applicable to the heavier automobile brake of quality.
Specific embodiment described herein only is to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has more used front case 1, rear housing 2, vacuum elbow 3, Input Forces push rod 4, air valve base 5, piston body 6, output force pushing bar 7, reaction plate 8, piston body pull back spring 9, rubber jacking block 10, spring perch 11, front diaphragm 12, rear film 13, ante-chamber 14, middle separate space 15, back cavity 16, first passage 17, second channel 18, front diaphragm dish 19, rear film dish 20, dust boot 21, foam filter 22, seal ring 23, control cock 24, control cock deck 25, control valve spring 26, Input Forces push rod pull back spring 27 terms such as grade, but do not get rid of the possibility of using other term.Using these terms only is in order to describe more easily and explain essence of the present utility model; They are construed to any additional restriction all is contrary with the utility model spirit.
Claims (10)
1. vacuum booster, comprise front case (1) and the rear housing (2) that is connected with front case (1), described front case (1) is fixed with for the vacuum elbow that is connected with air inlet pipe (3), described rear housing (2) center is equipped with Input Forces push rod (4), described Input Forces push rod (4) is provided with the control cock assembly that is positioned between Input Forces push rod (4) and the rear housing (2) and the inner of Input Forces push rod (4) is fixed with air valve base (5), the control cock assembly comprises control cock (24), described Input Forces push rod (4) is connected with the piston body (6) that penetrates rear housing (2), the inner center of described piston body (6) is fixed with the output force pushing bar (7) with the coaxial setting of Input Forces push rod (4), the inner center of described piston body (6) also is fixed with the reaction plate (8) that is positioned between output force pushing bar (7) and the air valve base (5), be fixed with the piston body pull back spring (9) that makes piston body (6) return in the described front case (1), be fixed with between described front case (1) and the rear housing (2) the separated diaphragm of chamber between front case (1) and the rear housing (2), described piston body has communicating passage on (6), it is characterized in that, described output force pushing bar (7) is positioned at front case (1), front case (1) center is fixed with the rubber jacking block (10) that extends axially direction in output force pushing bar (7), has the brake cabin distance between described rubber jacking block (10) and the output force pushing bar (7).
2. a kind of vacuum booster according to claim 1 is characterized in that, described rubber jacking block (10) is mutually bonding with front case (1).
3. a kind of vacuum booster according to claim 1 and 2, it is characterized in that, described piston body (6) the inner is fixed with spring perch (11), described output force pushing bar (7) one ends are embedded in the spring perch (11), one end of described piston body pull back spring (9) acts on the front case (1), and the other end of piston body pull back spring (9) acts on the spring perch (11).
4. a kind of vacuum booster according to claim 3, it is characterized in that, described diaphragm comprises front diaphragm (12) and rear film (13), front diaphragm (12) and rear film (13) are separated into three chambers with the chamber between front case (1) and the rear housing (2), chamber between front case (1) and the front diaphragm (12) is ante-chamber (14), chamber between front diaphragm (12) and the rear film (13) is middle separate space (15), chamber between rear film (13) and the rear housing (2) is back cavity (16), and communicating passage comprises the first passage (17) that can be communicated with back cavity (16) and control cock (24) that the inner place of piston body (6) has, have between piston body (6) and the spring perch (11) can be communicated with in the second channel (18) of separate space (15) and first passage (17).
5. a kind of vacuum booster according to claim 4, it is characterized in that, be fixed with on the described spring perch (11) for the front diaphragm dish (19) that supports front diaphragm (12) with for the rear film dish (20) that supports rear film (13).
6. a kind of vacuum booster according to claim 1 and 2 is characterized in that, described rear housing (2) is fixed with the dust boot (21) that piston body (6) outer end is shrouded.
7. a kind of vacuum booster according to claim 6 is characterized in that, described dust boot (21) has a circle perforate, and dust boot (21) is fixed with the foam filter (22) of the ring-type that perforate is covered.
8. a kind of vacuum booster according to claim 1 and 2 is characterized in that, the contact position of described rear housing (2) and piston body (6) is fixed with seal ring (23).
9. a kind of vacuum booster according to claim 6, it is characterized in that, described control cock assembly comprise control cock (24), control cock deck (25) and be positioned at control cock deck (25) and control cock (24) between control valve spring (26), described control cock deck (25) is clamped in piston body (6) inwall, described control cock (24) one ends are resisted against air valve base (5), and control cock (24) other end is resisted against control cock deck (25).
10. a kind of vacuum booster according to claim 9, it is characterized in that, be provided with Input Forces push rod pull back spring (27) between described control cock deck (25) and the dust boot (21), one end of described Input Forces push rod pull back spring (27) acts on control cock deck (25), and the other end of Input Forces push rod pull back spring (27) acts on dust boot (21) inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220371454 CN202728211U (en) | 2012-07-30 | 2012-07-30 | Vacuum booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220371454 CN202728211U (en) | 2012-07-30 | 2012-07-30 | Vacuum booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202728211U true CN202728211U (en) | 2013-02-13 |
Family
ID=47653940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220371454 Expired - Fee Related CN202728211U (en) | 2012-07-30 | 2012-07-30 | Vacuum booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202728211U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106427966A (en) * | 2016-11-23 | 2017-02-22 | 浙江力邦合信智能制动系统股份有限公司 | Electronic control brake booster used in vehicle braking system |
| CN107813808A (en) * | 2017-11-17 | 2018-03-20 | 中国第汽车股份有限公司 | A kind of air booster assembly applied to brake fluid system |
-
2012
- 2012-07-30 CN CN 201220371454 patent/CN202728211U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106427966A (en) * | 2016-11-23 | 2017-02-22 | 浙江力邦合信智能制动系统股份有限公司 | Electronic control brake booster used in vehicle braking system |
| CN106427966B (en) * | 2016-11-23 | 2022-11-04 | 浙江力邦合信智能制动系统股份有限公司 | Electronic control brake booster for vehicle brake system |
| CN107813808A (en) * | 2017-11-17 | 2018-03-20 | 中国第汽车股份有限公司 | A kind of air booster assembly applied to brake fluid system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101628577A (en) | Hysteresis characterizing typed electro pedal device | |
| CN202966284U (en) | Single diaphragm type vacuum booster | |
| CN202728211U (en) | Vacuum booster | |
| CN102741103B (en) | Braking force amplifier | |
| CN201923121U (en) | Electronic vacuum booster device | |
| JP2002187540A (en) | Negative pressure booster | |
| CN202728210U (en) | Vacuum booster | |
| CN201002601Y (en) | Penetration type double-diaphragm vacuum booster assembly | |
| CN202451659U (en) | Vacuum booster pump and clutch main pump | |
| CN203384252U (en) | Air pressure assistance clutch pump assembly | |
| JP5716901B2 (en) | Pneumatic booster | |
| CN104129379A (en) | Pedal travel simulator for automobile brake system | |
| CN202728209U (en) | Vacuum booster | |
| CN200948792Y (en) | Vacuum booster | |
| CN208646832U (en) | A kind of double diaphragms of thin bar run through vacuum booster | |
| CN2855851Y (en) | Vacuum booster of through-rod type | |
| CN103758901A (en) | Internal respiration structure of diaphragm type spring braking air chamber of brake system of commercial vehicle | |
| CN202728208U (en) | Vacuum booster | |
| CN204821541U (en) | Parallel two -chamber braking main valve | |
| CN102050100A (en) | Electronic vacuum booster device | |
| CN203702939U (en) | Breathing structure inside diaphragm type spring braking air chamber of commercial vehicle | |
| US5477681A (en) | Dual center-port master cylinder | |
| CN204077641U (en) | A kind of brake system of car pedal stroke simulator | |
| CN216467738U (en) | Control valve structure suitable for low initial power vacuum booster | |
| CN204355028U (en) | A kind of vacuum booster for vehicle brake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20150730 |
|
| EXPY | Termination of patent right or utility model |