CN2271987Y - Floating contact double-diaphragm vacuum power assistance for vehicle - Google Patents
Floating contact double-diaphragm vacuum power assistance for vehicle Download PDFInfo
- Publication number
- CN2271987Y CN2271987Y CN 96220268 CN96220268U CN2271987Y CN 2271987 Y CN2271987 Y CN 2271987Y CN 96220268 CN96220268 CN 96220268 CN 96220268 U CN96220268 U CN 96220268U CN 2271987 Y CN2271987 Y CN 2271987Y
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- push rod
- valve body
- assembly
- vacuum
- 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 - Lifetime
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- Braking Systems And Boosters (AREA)
Abstract
The utility model relates to a floating contact double-diaphragm vacuum power assistant device for vehicles, belonging to a vacuum power assistant device which uses an inverse power disk to connect and seal a double-diaphragm valve body structure in a hydraulic braking system. The floating contact double-diaphragm vacuum power assistant device for vehicles is composed of a filtering device 1, a control push rod 2, a push rod spring 3, a rubber valve 4, a valve piston 5, a valve piston spring 6, a diaphragm valve body assembly 7, an inverse power disk 8, a main cylinder push rod 9, a diaphragm piston assembly 10, and a return spring 11, wherein, the diaphragm piston assembly 10 is directly arranged on the main cylinder push rod. The diaphragm piston assembly 10 is floated and sheathed on the diaphragm valve body assembly 7 through the inverse power disk 8. The inverse power disk 8 not only can cause the diaphragm piston assembly 10 and the diaphragm valve body assembly 7 to play a sealing function, but also the inverse power disk 8 and the diaphragm valve body assembly form a complete single-diaphragm power assistant device, and the generalized degree of the floating contact double-diaphragm vacuum power assistant device for vehicles is enhanced.
Description
The two diaphragm vacuum boosters of a kind of automobile-used unsteady contact belong to the vacuum booster unit that adopts the sealing of counter-force dish, the two diaphragm valve body structures of balance in the hydraulic brake system.
China's automobile is with the vacuum booster that adopts advanced two diaphragm structures in the hydraulic brake system, as Nanjing IVECO car at present.This structure adopts two diaphragm valve body assemblies, can realize bigger vacuum servo, but because its diaphragm-type servo unit assembly and diaphragm valve body assembly are that screw thread is rigidly connected, the vacuum servo that produces when work all acts on the counter-force dish, pass to master cylinder push rod by the counter-force dish and carry out hydraulic braking, hydraulic counter force all acts on the counter-force dish by the master cylinder brake push rod again simultaneously, therefore counter-force dish bearing load is bigger, be easy to damage, cause the life-span to reduce, because this structure Design makes its process and assemble accuracy requirement strictness, cost is higher.
Provide a kind of rational in infrastructure, reliable operation at the problems referred to above the utility model, and can with the two diaphragm vacuum boosters of the automobile-used unsteady contact of single-iris vacuum booster diaphragm valve body assembly general-duty.
Design of the present utility model is that the diaphragm-type servo unit assembly in two diaphragm assemblies is set directly on the master cylinder push rod, and thereon by diaphragm valve body assembly of the unsteady stack of counter-force dish, make the counter-force dish only bear the vacuum servo that the diaphragm valve body assembly produces, thereby improve its service life.
Concrete structure of the present utility model and principle of work be enumeration with the following Examples:
The utility model by filtering installation 1, control push rod 2, push rod spring 3, rubber valve 4, valve bucket 5, valve bucket spring 6, diaphragm valve body assembly 7, counter-force dish 8, master cylinder push rod 9, assembly 10, pull back spring 11 etc. were formed when diaphragm lived through.Wherein the diaphragm valve body assembly 10, be directly arranged on the master cylinder push rod 9, diaphragm is always filled in assembly 10 by counter-force dish 8, and empty boasting is on diaphragm valve body assembly 7, counter-force dish 8 plays sealing function to both on the one hand, constitutes a complete single-iris servo-unit with diaphragm valve body assembly 7 on the other hand.Its universalization degree is improved, because the counter-force dish is only born the vacuum servo from diaphragm valve body assembly 7, improved in the life-span greatly simultaneously.
Its principle of work: during automobile normal running, this structure is under the combined action of control push rod spring 3 and valve bucket spring 6, rubber valve 4 withstands valve bucket 5, form leak free air valve port 13, because the IV chamber connects vacuum source, I, II, III, IV chamber keep identical degree of vacuum and atmospheric isolation at this moment.
Step on brake pedal, the control push rod moves forward, opens air valve port 13, closes vacuum valve port 14, cuts off passage D, I, III two chambeies and II, IV two chambeies are completely cut off, II, IV chamber still keep original degree of vacuum, air then installs 1 after filtration, passage A, B, C enter I, III chamber, produce pressure reduction in the diaphragm assembly this moment, it is moved forward, promptly produce vacuum servo twice.The vacuum servo that diaphragm valve body assembly 7 produces passes to diaphragm-type servo unit assembly 10 by counter-force dish 8, and diaphragm-type servo unit assembly 10 reacts on master cylinder push rod 9 together with the power-assisted one of himself, produces powerful hydraulic pressure and brakes.Hydraulic counter force is by master cylinder push rod 9, and a part is born by diaphragm-type servo unit assembly 10, and another part acts on the counter-force dish 8.
Hold that brake pedal, control push rod are 2 motionless, valve bucket 5 moves after under the effect of counter-force dish 8, close air valve port 13 and vacuum valve port 14, make it be in state of equilibrium.
When loosening the system pedal, control push rod 2 is under the effect of push rod spring 3, close air valve port 13, open vacuum valve port 14, vacuum source with the air in I, the III chamber through channel C, B, A, D, E sucking-off, make I, II, III, IV chamber recover original degree of vacuum, and under the effect of pull back spring 11, make the diaphragm assembly get back to the initial position.Promptly finish a working cycle.
This reasonable in design, reliable operation, cost is low, long service life.And fine commonality is arranged with the single-iris vacuum booster.
Fig. 1 is the sectional structure chart of the two diaphragm vacuum boosters of automobile-used unsteady contact.
Most preferred embodiment of the present utility model as mentioned above.
Claims (1)
1, the two diaphragm vacuum boosters of a kind of automobile-used unsteady contact, formed by filtering installation 1, control push rod 2, push rod spring 3, rubber valve 4, valve bucket 5, valve bucket spring 6, diaphragm valve body assembly 7, counter-force dish 8, master cylinder push rod 9, diaphragm-type servo unit assembly 10, pull back spring 11, it is characterized in that, diaphragm-type servo unit assembly 10 is set directly on the master cylinder push rod 9, diaphragm-type servo unit assembly 10 is by counter-force dish 8, and empty boasting is on diaphragm valve body assembly 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96220268 CN2271987Y (en) | 1996-08-29 | 1996-08-29 | Floating contact double-diaphragm vacuum power assistance for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96220268 CN2271987Y (en) | 1996-08-29 | 1996-08-29 | Floating contact double-diaphragm vacuum power assistance for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2271987Y true CN2271987Y (en) | 1998-01-07 |
Family
ID=33900629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96220268 Expired - Lifetime CN2271987Y (en) | 1996-08-29 | 1996-08-29 | Floating contact double-diaphragm vacuum power assistance for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2271987Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123896A (en) * | 2008-07-29 | 2011-07-13 | 卢卡斯汽车股份有限公司 | Braking force generator for a motor vehicle brake system having a support system for a return spring |
-
1996
- 1996-08-29 CN CN 96220268 patent/CN2271987Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123896A (en) * | 2008-07-29 | 2011-07-13 | 卢卡斯汽车股份有限公司 | Braking force generator for a motor vehicle brake system having a support system for a return spring |
| CN102123896B (en) * | 2008-07-29 | 2013-12-18 | 卢卡斯汽车股份有限公司 | Braking force generator for motor vehicle brake system having support system for return spring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |