CN201784612U - High-pressure booster - Google Patents
High-pressure booster Download PDFInfo
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- CN201784612U CN201784612U CN2010205067236U CN201020506723U CN201784612U CN 201784612 U CN201784612 U CN 201784612U CN 2010205067236 U CN2010205067236 U CN 2010205067236U CN 201020506723 U CN201020506723 U CN 201020506723U CN 201784612 U CN201784612 U CN 201784612U
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- high pressure
- piston
- push rod
- valve
- air
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Abstract
The utility model discloses a high-pressure booster, which mainly comprises a front casing, a return spring, a brake main cylinder pushrod, a power piston, a brake pushrod, an air valve and a valve seat. When the brake pushrod is driven to move forwards under external force, the power piston and the air valve are driven to move, a second vent hole on the power piston is then closed, high-pressure air enters a high-pressure cavity through a clearance between the air valve and the brake pushrod and a first vent hole on the power piston, so that the power piston generates a boosting force. When the external force acting on the brake pushrod is canceled, the piston body and the brake main cylinder pushrod are withdrawn backwards under elasticity of the return spring, the brake pushrod and the air valve are then driven to withdraw, the second vent hole is opened, air in the high-pressure cavity enters an atmosphere cavity, and pressure on two sides of the power piston are the same, so that the boosting force is canceled and the high-pressure booster recovers to the original state. The high-pressure booster adopts high-pressure air rather than a vacuum source as power, the high-pressure booster can not be affected by running environment.
Description
Technical field
The application relates to the servo-unit technical field, particularly relates to a kind of high pressure servo-unit.
Background technology
Existing automobile brake force aid system generally adopts vacuum booster, this vacuum booster is as propulsion source with vacuum source, thereby generation power-assisted, described vacuum source is provided by engine air inlet tube, this principle of aspirated air when utilizing engine operation, make the side that described vacuum booster is connected with described engine air inlet tube form relative vacuum, have certain difference of pressure, utilize this difference of pressure to increase retrothrust with respect to the pressure of the bar pressure of opposite side.But, in some cases, such as: when plateau low pressure area or engine off (during engine off, owing to can not make the vacuum chamber of vacuum booster form relative vacuum, there are not enough draught heads, therefore do not have power-assisted), vacuum booster can not obtain enough degree of vacuum, do not have enough boosting powers, very easily cause the braking force deficiency, thereby very easily cause traffic accident.At present, be badly in need of a kind of servo-unit that not influenced by running environment.
The utility model content
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of high pressure servo-unit, thereby obtains a kind of servo-unit that not influenced by running environment, and technical scheme is as follows:
A kind of high pressure servo-unit comprises:
Be provided with the fore shell of air extractor vent;
The back cover of captiveing joint with described fore shell;
Captive joint with described back cover and be provided with the valve seat of induction opening;
The power piston that is connected with described valve seat, this power piston comprises the piston main body that matches with described fore shell, this piston main body is divided into high pressure chest and atmosphere chamber with the fore shell inner chamber, and matches with described valve seat and be provided with first air extractor vent that connects with high pressure chest and the piston rod of second air extractor vent that connects with atmosphere chamber;
With the suitable air valve of the inwall of described piston rod;
Run through the movable bonded assembly brake push rod of described air valve and described piston rod;
Be arranged in the described air valve and be set in spring for valve on the described brake push rod;
The master brake cylinder push rod of captiveing joint with described piston main body;
One end is arranged on the described fore shell inwall, the other end is connected with described piston main body, and is set in the pull back spring on the described master brake cylinder push rod.
Preferably, above-mentioned high pressure servo-unit also comprises:
Be arranged on the back-up ring between described pull back spring and the described piston main body.
Preferably, above-mentioned high pressure servo-unit also comprises:
Be set in the spring perch that is connected on the described brake push rod, with described spring for valve;
The jump ring of be arranged on the described brake push rod, the restraining spring seat being put.
Preferably, also be provided with piston packing ring between described piston main body and the fore shell.
The technical scheme that is provided by above the embodiment of the present application as seen, brake push rod moves forward under external force, the drive power piston moves, simultaneously, air valve moves forward up to touching power piston with brake push rod under the elastic force effect of spring for valve, and then second air extractor vent on the closed piston bar, thereby after making that high pressure gas enter the high pressure servo-unit, enter high pressure chest through gap between air valve and the brake push rod and first air extractor vent on the piston rod, make the air pressure in the high pressure chest be higher than the interior air pressure of atmosphere chamber, piston main body produces boosting power under the pressure effect of the draught head generation of its both sides, promote the master brake cylinder push rod and move forward the generation braking force; After acting on the external force disappearance on the brake push rod, piston main body and master brake cylinder push rod are drawn back under the elastic force effect of pull back spring, and then the drive brake push rod is drawn back, the final air valve that drives is drawn back, brake push rod and air valve all and between piston rod form the gap, second air extractor vent on the piston rod is opened, therefore the high pressure gas in the high pressure chest can be from first air extractor vent, gap through between piston rod and brake push rod finally enters atmosphere chamber by second air extractor vent, this moment, high pressure chest was communicated with atmosphere chamber, the air pressure of piston main body both sides is identical, and power-assisted disappears, and the high pressure servo-unit restPoses.Because the high pressure servo-unit that the embodiment of the present application provides is a power with high pressure gas, is not to be power with the vacuum source, therefore, this high pressure servo-unit is not subjected to the influence of running environment.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the decomposing schematic representation of the embodiment of the present application high pressure servo-unit;
Fig. 2 is the front view of a kind of high pressure servo-unit of the embodiment of the present application;
Fig. 3 is the sectional structure scheme drawing of A-A line among Fig. 2;
Gas flow scheme drawing when Fig. 4 is the embodiment of the present application high pressure servo-unit generation power-assisted;
Fig. 5 is the local structure for amplifying scheme drawing of Fig. 4;
Gas flow scheme drawing when Fig. 6 is the disappearance of the embodiment of the present application high pressure servo-unit power-assisted;
Fig. 7 is the local structure for amplifying scheme drawing of Fig. 6;
Fig. 8 a is the sectional structure scheme drawing of a kind of power piston of the embodiment of the present application along A-A line among Fig. 2;
Fig. 8 b is the structural representation in cross section, B-B line place among Fig. 8 a.
The specific embodiment
In order to make those skilled in the art person understand technical scheme among the application better, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all should belong to the scope of the application's protection.
Referring to Fig. 1-3, the decomposing schematic representation of the high pressure servo-unit that Fig. 1 provides for the embodiment of the present application, Fig. 2 is the lateral plan of a kind of high pressure servo-unit of the embodiment of the present application, Fig. 3 is the sectional structure scheme drawing of A-A direction among Fig. 2, the high pressure servo-unit that the embodiment of the present application provides mainly comprises: fore shell 1, pull back spring 2, master brake cylinder push rod 4, power piston 7, brake push rod 8, air valve 9, spring for valve 10, valve seat 13, back cover 14, wherein:
Master brake cylinder push rod 4 is captiveed joint with described piston main body, and is arranged with pull back spring 2 on it, and wherein, an end of this pull back spring is fixedly connected on the fore shell inwall, and the other end is connected with described piston main body;
The working process of above-mentioned high pressure servo-unit is as follows:
When brake push rod 8 moves forward under external force, driving power piston 7 moves forward, simultaneously, make spring for valve 10 compressions, air valve 9 is followed brake push rod 8 and is moved forward together under the elastic force effect of spring for valve 10, in the process that air valve 9 moves forward with brake push rod 8, air valve 9 can at first touch power piston, and then sealing is arranged on the power piston 7 and second air extractor vent 72 that connects with atmosphere chamber 200; And after air valve 9 touched power piston 7, the elastic force that brake push rod 8 overcomes spring for valve continued to move forward up to touching power piston 7, like this, brake push rod 8 and air valve 9 the high pressure servo-unit axially on form a gap.Therefore, the high pressure gas that enter from induction opening 131, can be via the gap between air valve 9 and the brake push rod 8, and first air extractor vent 71 that is in opening all the time enters high pressure chest 100, the concrete flow direction of high pressure gas is shown in the arrow among Fig. 4 and Fig. 5, wherein, Fig. 5 is the local enlarged diagram of Fig. 4.At this moment, the draught head difference of the piston main body both sides of power piston 7, and the air pressure of high pressure chest 100 sides is higher than the air pressure of atmosphere chamber 200 sides, and piston main body moves forward under the effect of draught head, drive master cylinder brake push rod 4 and move forward, promptly the high pressure servo-unit produces power-assisted.
After acting on the external force disappearance on the brake push rod 8, because the elastic force effect of pull back spring 2, power piston 7 moves backward, and then brake push rod 8 is moved backward, and it is mobile backward at the elastic force effect lower air valve 9 of spring for valve 10, thereby second air extractor vent 72 that connects with atmosphere chamber 200 is opened, high pressure gas in the high pressure chest 100 are through first air extractor vent 71, the gap that power piston 7 and brake push rod are 8, and second air extractor vent 72 enters atmosphere chamber 200, wherein, specifically shown in the arrow among Fig. 6 and Fig. 7, Fig. 7 is the local enlarged diagram of Fig. 6 to the flow direction of high pressure gas.Atmosphere chamber 200 and high pressure chest 100 are connected like this, and promptly the air pressure of piston main body both sides is identical, and high pressure servo-unit power-assisted disappears, and is back to initial condition.
Need to prove, induction opening 131 can be in opening all the time, because valve seat 13 ends are approached in the position of induction opening 131, so can induction opening be set by piston rod and the 131 corresponding positions of the induction opening on the valve seat, so that high pressure gas enter in the high pressure servo-unit at power piston 7.
The high pressure servo-unit that present embodiment provides is a propulsion source with high pressure gas, is not to be propulsion source with the vacuum source, and therefore, this high pressure servo-unit is not subjected to the influence of running environment.
Preferably, referring to Fig. 1-3, on the architecture basics of the high pressure servo-unit that the foregoing description provides,
Also be provided with back-up ring 3 between pull back spring 2 and power piston main body, the diameter of the diameter of this back-up ring and pull back spring 2 is suitable, is used for the elastic force of pull back spring 2 is passed to power piston 7 and master brake cylinder push rod 4.
Also be arranged with spring perch 11 on brake push rod 8, this spring perch 11 is connected with spring for valve 10, is used for spring for valve 10 is captiveed joint with brake push rod 8, makes brake push rod 8 draw back under spring for valve 10 elastic force effects.And, described spring perch 11 be not provided with jump ring 12 with spring for valve bonded assembly one side, be used to limit and the position of fixing spring seat 11, thereby realize that spring perch 11 captives joint with brake push rod 8.
Between the piston main body of power piston 7 and fore shell 1, be provided with piston packing ring 6, make the piston main body and 1 airtight connection of fore shell of power piston, to prevent that gas from passing through from the gap between fore shell 1 and the power piston, avoid atmosphere chamber 200 and high pressure chest 100 to be connected.
The tail diameter that also is provided with diameter and master brake cylinder push rod in master brake cylinder push rod and power piston junction is the reaction tray 5 of joining mutually, be used for the application force on the action scope brake push rod 8 is directly passed to master brake cylinder push rod 4, increase the boosting power of this high pressure servo-unit.
Referring to Fig. 8 a and Fig. 8 b, Fig. 8 a is the sectional structure scheme drawing of power piston along A-A line among Fig. 2, and Fig. 8 b is the schematic cross-section at B-B line place among Fig. 8 a.By Fig. 8 b as seen, power piston 7 is provided with four first air extractor vents 71, and four second air extractor vents 72, and described first air extractor vent 71 is about the center symmetry of piston, second air extractor vent is also about the center symmetry of piston, a plurality of first air extractor vents 71 are set make gas enter fast in the high pressure chest 100, thereby make the high pressure servo-unit produce boosting power apace.A plurality of second air extractor vents 72 are set make the fast flow speed and direction atmosphere chamber 200 of gas in the high pressure chest, the power-assisted of this high pressure servo-unit is disappeared at short notice, be back to initial condition, so that use next time.
Each embodiment in this specification sheets all adopts the mode of going forward one by one to describe, and identical similar part is mutually referring to getting final product between each embodiment, and each embodiment stresses all is difference with other embodiment.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.
The above only is the application's the specific embodiment; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the application's protection domain.
Claims (4)
1. a high pressure servo-unit is characterized in that, comprising:
Be provided with the fore shell of air extractor vent;
The back cover of captiveing joint with described fore shell;
Captive joint with described back cover and be provided with the valve seat of induction opening;
The power piston that is connected with described valve seat, this power piston comprises the piston main body that matches with described fore shell, this piston main body is divided into high pressure chest and atmosphere chamber with the fore shell inner chamber, and matches with described valve seat and be provided with first air extractor vent that connects with high pressure chest and the piston rod of second air extractor vent that connects with atmosphere chamber;
With the suitable air valve of the inwall of described piston rod;
Run through the movable bonded assembly brake push rod of described air valve and described piston rod;
Be arranged in the described air valve and be set in spring for valve on the described brake push rod;
The master brake cylinder push rod of captiveing joint with described piston main body;
One end is arranged on the described fore shell inwall, the other end is connected with described piston main body, and is set in the pull back spring on the described master brake cylinder push rod.
2. high pressure servo-unit according to claim 1 is characterized in that, also comprises:
Be arranged on the back-up ring between described pull back spring and the described piston main body.
3. high pressure servo-unit according to claim 1 and 2 is characterized in that, also comprises:
Be set in the spring perch that is connected on the described brake push rod, with described spring for valve;
The jump ring of be arranged on the described brake push rod, the restraining spring seat being put.
4. high pressure servo-unit according to claim 3 is characterized in that, also is provided with piston packing ring between described piston main body and the fore shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205067236U CN201784612U (en) | 2010-08-24 | 2010-08-24 | High-pressure booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205067236U CN201784612U (en) | 2010-08-24 | 2010-08-24 | High-pressure booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201784612U true CN201784612U (en) | 2011-04-06 |
Family
ID=43816590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205067236U Expired - Fee Related CN201784612U (en) | 2010-08-24 | 2010-08-24 | High-pressure booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201784612U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529930A (en) * | 2011-12-30 | 2012-07-04 | 晋江市升泰机械配件有限公司 | Air booster pump of engineering mechanical brake system |
| CN111003479A (en) * | 2019-12-20 | 2020-04-14 | 济南海能仪器股份有限公司 | Feeding slide block and full-automatic sample feeding device |
-
2010
- 2010-08-24 CN CN2010205067236U patent/CN201784612U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529930A (en) * | 2011-12-30 | 2012-07-04 | 晋江市升泰机械配件有限公司 | Air booster pump of engineering mechanical brake system |
| CN111003479A (en) * | 2019-12-20 | 2020-04-14 | 济南海能仪器股份有限公司 | Feeding slide block and full-automatic sample feeding device |
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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: 20110406 Termination date: 20140824 |
|
| EXPY | Termination of patent right or utility model |