CN202728209U - Vacuum booster - Google Patents
Vacuum booster Download PDFInfo
- Publication number
- CN202728209U CN202728209U CN 201220371458 CN201220371458U CN202728209U CN 202728209 U CN202728209 U CN 202728209U CN 201220371458 CN201220371458 CN 201220371458 CN 201220371458 U CN201220371458 U CN 201220371458U CN 202728209 U CN202728209 U CN 202728209U
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- CN
- China
- Prior art keywords
- push rod
- control cock
- input forces
- forces push
- rear housing
- 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
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- Braking Systems And Boosters (AREA)
Abstract
The utility model provides a vacuum booster, belongs to the field of car brake technique, and resolves the problems that an existing vacuum booster is short in service life, and the like. The vacuum booster comprises a front shell and a rear shell fixedly connected with the front shell, a membrane which enables a cavity chamber between the front shell and the rear shell to be divided into a front cavity and a rear cavity is fixedly connected between the front shell and the rear shell, 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, an input force push rod return spring enabling the input force push rod to be returned is arranged between the control valve and the rear shell, a push rod gasket is fixed on the input force push rod, one end of the input force push rod return spring acts on the control valve, and the other end of the input force push rod return spring abuts against the push rod gasket. The vacuum booster has the advantages of being convenient to install, 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: 03231036.6; Granted publication number: CN2619847Y], it is comprised of front case assembly and continuous rear housing assembly thereof, form common pressure chamber in the front case assembly, form the transformation chamber in the rear housing assembly, transformation chamber in the rear housing assembly is provided with the control cock assembly, and the centre of control cock assembly is provided with push rod, and the end of push rod connects the control cock piston, the control cock piston connects the servo cylinder piston, is provided with the zigzag locking plate between control cock piston and servo cylinder piston.
Above-mentioned patent effectively shortens the idle travel of vacuum booster by the zigzag locking plate is set, improved traffic safety, but its Input Forces push rod pull back spring is the same with existing vacuum booster, Input Forces push rod pull back spring one end is directly conflicted on control cock, the other end is directly conflicted on air filter, Input Forces push rod pull back spring easily causes damage to control cock, the material of controlled filter device is soft than the material of Input Forces push rod pull back spring, in use Input Forces push rod pull back spring easily embeds in the air filter, cause like this air filter short service life, also easily air filter is pushed away the rear housing assembly, also prolong braking distance, affected braking effect.
Summary of the invention
The purpose of this utility model is for the above-mentioned problems in the prior art, and a kind of vacuum booster that makes things convenient for the installation of Input Forces push rod pull back spring, long service life 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, be fixed with the diaphragm that the chamber between front case and the rear housing is separated into ante-chamber and back cavity between described front case and the rear housing, 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 provided with the Input Forces push rod pull back spring that makes Input Forces push rod return between described control cock and the rear housing, it is characterized in that, be fixed with the push rod pad on the described Input Forces push rod, one end of described Input Forces push rod pull back spring acts on the control cock, and the other end of Input Forces push rod pull back spring is conflicted on the push rod pad.
This vacuum servo-unit is by the setting of push rod pad, make things convenient for the installation location of Input Forces push rod pull back spring, and avoid Input Forces push rod pull back spring that other parts of vacuum booster are caused damage, prolonged the service life of this vacuum servo-unit, guaranteed that this vacuum servo-unit still has good braking effect after long-time the use.
In above-mentioned vacuum booster, have step on the described Input Forces push rod, described push rod pad is positioned on the step.Step makes things convenient for the installation of push rod pad, and step is easy to process in addition, low cost of manufacture.
In above-mentioned vacuum booster, described Input Forces push rod is provided with the control cock pad between control cock and Input Forces push rod pull back spring, and described control cock pad fits in control cock and stopped by control cock.The control cock pad avoids Input Forces push rod pull back spring directly to conflict on control cock, guarantees that control cock is not damaged by Input Forces push rod pull back spring in use, has prolonged the service life of control cock.
In above-mentioned vacuum booster, described push rod pad and control cock pad all adopt metallic material to make.The push rod pad that metallic material is made and the long service life of control cock pad, not yielding.
In above-mentioned vacuum booster, the shaft middle part of described Input Forces push rod is arranged with the foam filter between Input Forces push rod and piston body, described foam filter inner ring contacts at the shaft of Input Forces push rod, and the outer ring of foam filter contacts at the piston body inwall.Foam filter plays a role in filtering, and guarantees that clean air enters into vacuum booster inside.
In above-mentioned vacuum booster, described rear housing is fixed with the dust boot that piston body outer end and foam filter are shrouded.Dust boot prevents that airborne dust from entering into the inside of vacuum booster, prolonged service life.
In above-mentioned vacuum booster, the contact position of described rear housing and piston body is fixed with seal ring.
In above-mentioned 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 of foam filter inboard, described control cock one end is resisted against air valve base, the control cock other end acts on the control cock deck, described control valve spring one end is resisted against control cock, and the other end of control valve spring is resisted against step.
In above-mentioned vacuum booster, be fixed with locking plate on the described air valve base, described locking plate can be resisted against the rear housing inwall.The setting of locking plate prevents that Input Forces push rod and air valve base break away from rear housing.
In above-mentioned vacuum booster, described front case is fixed with the vacuum elbow that is connected for air inlet pipe.Vacuum elbow not only is convenient to be connected with air inlet pipe, and can save installing space.
Compared with prior art, this vacuum servo-unit is by the setting of push rod pad, make things convenient for the installation location of Input Forces push rod pull back spring, and avoid Input Forces push rod pull back spring that foam filter is caused damage, prolonged the service life of this vacuum servo-unit, guarantee that this vacuum servo-unit still has good braking effect after long-time the use, this vacuum servo-unit is by the setting of control cock pad in addition, avoid Input Forces push rod pull back spring directly to conflict on control cock, guarantee that control cock is not damaged by Input Forces push rod pull back spring in use, prolonged the service life of control cock.
Description of drawings
Fig. 1 is the sectional structure scheme drawing of this vacuum servo-unit.
Fig. 2 is the local structure enlarged drawing at Fig. 1 circle A place.
Among the figure, 1, front case; 2, rear housing; 3, ante-chamber; 4, back cavity; 5, diaphragm; 6, Input Forces push rod; 7, air valve base; 8, piston body; 9, output force pushing bar; 10, reaction plate; 11, piston body pull back spring; 12, Input Forces push rod pull back spring; 13, push rod pad; 14, step; 15, control cock pad; 15a, turn edge; 16, foam filter; 17, dust boot; 18, seal ring; 19, control cock; 20, control cock deck; 21, control valve spring; 22, locking plate; 23, vacuum elbow.
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 depicted in figs. 1 and 2, this vacuum servo-unit comprises front case 1 and rear housing 2, front case 1 is fixed with for the vacuum elbow 23 that is connected with air inlet pipe, 2 riveted joints of front case 1 and rear housing be connected and front case 1 and rear housing 2 between be fixed with the diaphragm 5 that the chamber between front case 1 and the rear housing 2 is separated into ante-chamber 3 and back cavity 4, rear housing 2 centers are equipped with Input Forces push rod 6, Input Forces push rod 6 is provided with control cock assembly between Input Forces push rod 6 and rear housing 2 and the inner of Input Forces push rod 6 is fixed with air valve base 7, be fixed with locking plate 22 on the air valve base 7, locking plate 22 can be resisted against rear housing 2 inwalls.The control cock assembly comprises control cock 19, control cock deck 20 and the control valve spring 21 between control cock deck 20 and control cock 19.Input Forces push rod 6 is connected with the piston body 8 that penetrates rear housing 2, the contact position of rear housing 2 and piston body 8 is fixed with seal ring 18, piston body 8 inner centers are fixed with the output force pushing bar 9 with the 6 coaxial settings of Input Forces push rod, piston body 8 inner centers also are fixed with the reaction plate 10 between output force pushing bar 9 and air valve base 7, be fixed with the piston body pull back spring 11 that makes piston body 8 returns in the front case 1, one end of piston body pull back spring 11 is resisted against front case 1 inwall, the other end of piston body pull back spring 11 is resisted against on piston body 8 the inners, is provided with the Input Forces push rod pull back spring 12 that makes Input Forces push rod 6 returns between control cock 19 and the rear housing 2.
The shaft middle part of Input Forces push rod 6 is arranged with the foam filter 16 between Input Forces push rod 6 and piston body 8, foam filter 16 inner rings contact at the shaft of Input Forces push rod 6, the outer ring of foam filter 16 contacts at piston body 8 inwalls, control cock deck 20 is clamped in piston body 8 inwalls of foam filter 16 inboards, control cock 19 1 ends are resisted against air valve base 7, control cock 19 other ends act on control cock deck 20, control valve spring 21 1 ends are resisted against control cock 19, and the other end of control valve spring 21 is resisted against step 14.Rear housing 2 is fixed with the dust boot 17 that piston body 8 outer ends and foam filter 16 are shrouded.
As shown in Figure 2, be fixed with push rod pad 13 on the Input Forces push rod 6, has step 14 in the present embodiment on the Input Forces push rod 6, push rod pad 13 is positioned on the step 14, Input Forces push rod 6 is provided with the control cock pad 15 between control cock 19 and Input Forces push rod pull back spring 12, control cock pad 15 fits in control cock 19 and is stopped by control cock 19, control cock pad 15 has a 15a of turning edge in the present embodiment, the 15a that turns edge is pressed between control cock 19 and the control cock deck 20 by control cock deck 20, and control cock deck 20 is supported in control cock pad 15 inner rings, control cock deck 20 is difficult for breaking away from than directly being supported in piston body 8 inwalls more like this, control cock deck 20 position stabilities are good, long service life.One end of Input Forces push rod pull back spring 12 is resisted against on the control cock pad 15, and the other end of Input Forces push rod pull back spring 12 is conflicted on push rod pad 13.Push rod pad 13 and control cock pad 15 all adopt metallic material to make, and push rod pad 13 and control cock pad 15 adopt stainless steel material to make in the present embodiment.
This vacuum servo-unit is by the setting of push rod pad 13 and control cock pad 15, avoid 12 pairs of foam filters 16 of Input Forces push rod pull back spring, control cock 19 to cause damage, prolonged the service life of control cock 19 and foam filter 16, guaranteed that this vacuum servo-unit still has good braking effect after long-time the use.
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 the terms such as front case 1, rear housing 2, ante-chamber 3, back cavity 4, diaphragm 5, Input Forces push rod 6, air valve base 7, piston body 8, output force pushing bar 9, reaction plate 10, piston body pull back spring 11, Input Forces push rod pull back spring 12, push rod pad 13, step 14, control cock pad 15, the 15a that turns edge, foam filter 16, dust boot 17, seal ring 18, control cock 19, control cock deck 20, control valve spring 21, locking plate 22, vacuum elbow 23, 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), be fixed with the diaphragm (5) that the chamber between front case (1) and the rear housing (2) is separated into ante-chamber (3) and back cavity (4) between described front case (1) and the rear housing (2), described rear housing (2) center is equipped with Input Forces push rod (6), described Input Forces push rod (6) is provided with the control cock assembly that is positioned between Input Forces push rod (6) and the rear housing (2) and the inner of Input Forces push rod (6) is fixed with air valve base (7), the control cock assembly comprises control cock (19), described Input Forces push rod (6) is connected with the piston body (8) that penetrates rear housing (2), the inner center of described piston body (8) is fixed with the output force pushing bar (9) with the coaxial setting of Input Forces push rod (6), the inner center of described piston body (8) also is fixed with the reaction plate (10) that is positioned between output force pushing bar (9) and the air valve base (7), be fixed with the piston body pull back spring (11) that makes piston body (8) return in the described front case (1), be provided with the Input Forces push rod pull back spring (12) that makes Input Forces push rod (6) return between described control cock (19) and the rear housing (2), it is characterized in that, be fixed with push rod pad (13) on the described Input Forces push rod (6), one end of described Input Forces push rod pull back spring (12) acts on the control cock (19), and the other end of Input Forces push rod pull back spring (12) is conflicted on push rod pad (13).
2. vacuum booster according to claim 1 is characterized in that, has step (14) on the described Input Forces push rod (6), and described push rod pad (13) is positioned on the step (14).
3. vacuum booster according to claim 2, it is characterized in that, described Input Forces push rod (6) is provided with the control cock pad (15) that is positioned between control cock (19) and the Input Forces push rod pull back spring (12), and described control cock pad (15) fits in control cock (19) and stopped by control cock (19).
4. vacuum booster according to claim 3 is characterized in that, described push rod pad (13) and control cock pad (15) all adopt metallic material to make.
5. according to claim 1 and 2 or 3 or 4 described vacuum boosters, it is characterized in that, the shaft middle part of described Input Forces push rod (6) is arranged with the foam filter (16) that is positioned between Input Forces push rod (6) and the piston body (8), described foam filter (16) inner ring contacts at the shaft of Input Forces push rod (6), and the outer ring of foam filter (16) contacts at piston body (8) inwall.
6. vacuum booster according to claim 5 is characterized in that, described rear housing (2) is fixed with the dust boot (17) that piston body (8) outer end and foam filter (16) are shrouded.
7. according to claim 1 and 2 or 3 or 4 described vacuum boosters, it is characterized in that the contact position of described rear housing (2) and piston body (8) is fixed with seal ring (18).
8. vacuum booster according to claim 5, it is characterized in that, described control cock assembly comprises control cock (19), control cock deck (20) and be positioned at control cock deck (20) and control cock (19) between control valve spring (21), described control cock deck (20) is clamped in inboard piston body (8) inwall of foam filter (16), described control cock (19) one ends are resisted against air valve base (7), control cock (19) other end acts on control cock deck (20), described control valve spring (21) one ends are resisted against control cock (19), and the other end of control valve spring (21) is resisted against step (14).
9. according to claim 1 and 2 or 3 or 4 described vacuum boosters, it is characterized in that be fixed with locking plate (22) on the described air valve base (7), described locking plate (22) can be resisted against rear housing (2) inwall.
10. according to claim 1 and 2 or 3 or 4 described vacuum boosters, it is characterized in that described front case (1) is fixed with for the vacuum elbow that is connected with air inlet pipe (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220371458 CN202728209U (en) | 2012-07-30 | 2012-07-30 | Vacuum booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220371458 CN202728209U (en) | 2012-07-30 | 2012-07-30 | Vacuum booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202728209U true CN202728209U (en) | 2013-02-13 |
Family
ID=47653938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220371458 Expired - Fee Related CN202728209U (en) | 2012-07-30 | 2012-07-30 | Vacuum booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202728209U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909915A (en) * | 2013-02-27 | 2014-07-09 | 上海大陆汽车制动系统销售有限公司 | Double-chamber booster and partition plate supporting structure thereof |
| CN106414193A (en) * | 2014-06-06 | 2017-02-15 | 罗伯特·博世有限公司 | Vacuum brake booster |
-
2012
- 2012-07-30 CN CN 201220371458 patent/CN202728209U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909915A (en) * | 2013-02-27 | 2014-07-09 | 上海大陆汽车制动系统销售有限公司 | Double-chamber booster and partition plate supporting structure thereof |
| CN106414193A (en) * | 2014-06-06 | 2017-02-15 | 罗伯特·博世有限公司 | Vacuum brake booster |
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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 |