CN2846242Y - Hydraulic booster - Google Patents
Hydraulic booster Download PDFInfo
- Publication number
- CN2846242Y CN2846242Y CN 200520098533 CN200520098533U CN2846242Y CN 2846242 Y CN2846242 Y CN 2846242Y CN 200520098533 CN200520098533 CN 200520098533 CN 200520098533 U CN200520098533 U CN 200520098533U CN 2846242 Y CN2846242 Y CN 2846242Y
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- CN
- China
- Prior art keywords
- pump housing
- guiding valve
- valve
- lever
- boosting piston
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- 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 hydraulic booster applied to braking systems of a light load-carrying vehicle and an off-road vehicle, which adopts a power steering pump as a power source, and an energy accumulator as a spare booster system. The pump of the utility model is fixedly connected with the energy accumulator, and a charging and discharging channel of the energy accumulator is formed by a one-way valve and a plunger piston; a boosting piston is arranged in the pump, the left end of the boosting piston is connected with an output push rod, and the right end of the boosting piston is connected with a lever; a pedal rod and an input rod are connected together through a locking ring, and the input rod is connected with the lever; the other end of the lever is connected with a sliding valve; the lower part of the sliding valve is communicated with an opening of the pump which is communicated with the energy accumulator through the one-way valve and the plunger piston. The booster is arranged between a braking pedal and a braking master cylinder. When system pressure is normal, pressure oil is provided by the power steering pump, and the pressure oil helps the braking pedal to push the boosting piston to realize boosting braking. In addition, the pressure oil is also transported to a power steering gear to provide steering boosting force. When the system pressure is lost, the motion of the braking pedal can start the spare booster system automatically to provide emergent pressure to brake through the energy accumulator.
Description
Technical field
The utility model relates to the hydraulic booster of light truck, cross-country car brake system.
Background technology
Light truck, cross-country car generally adopt vacuum booster to carry out power brake at present, and it mainly comprises housing, piston, control cock, push rod, push rod, reaction plate and jacking block composition.Principle of work all is the vacuum that relies on aux. vacuum pump to produce, and the front/back cavity draught head of vacuum booster is increased.Because the draught head maximum of vacuum booster front/back cavity can only reach 80Kpa, further increases the power-assisted effect as needs, can only be by increasing the diameter of front/back cavity.Like this, certainly will cause volume to increase, and the space of installation brake component is very limited in the automobile.Thereby, limited the range of use of vacuum booster.Simultaneously, the vacuum booster speed of response is slow, poor controllability.
Summary of the invention
Need aux. vacuum pump in order to solve above-mentioned vacuum booster, volume is big, and speed of response is slow, and the shortcoming that delivery pressure is low the utility model proposes the hydraulic coupling that produces with the power steering pump with intergral reservoir hydraulic booster as propulsion source.
The utility model technology is achieved through the following technical solutions:
A kind of hydraulic booster, be installed between brake pedal and the master brake cylinder, comprise the pump housing, pump cover, it is characterized in that: be provided with boosting piston in the pump housing and cooperate with pump housing inner chamber, the boosting piston left end links to each other with the output push rod, one end of boosting piston right-hand member and lever is hinged, and the boosting piston right-hand member is the power-assisted chamber, and boosting piston is provided with pull back spring; Pedal-rod and input bar are linked together by lock ring, the connecting bore of the lock ring cylindrical and the pump housing is sealed and matched, the cylindrical of the left end of input bar and the blind hole of piston tail are sealed and matched, be provided with check valve in the left end center of input bar, the radially oil-feed aperture of check valve is arranged on the correct position on the cylindrical of importing the bar left end, one lever support is sleeved on the input bar, is provided with pull back spring between lever support and lock ring, and the salient point on lever support and the lever constitutes connecting pin; Below boosting piston, be provided with guiding valve and the pump housing is sealed and matched, use by different seal band area forms change-over valve, be provided with the guiding valve retracing spring between the guiding valve and the pump housing, the oil suction chamber and the pumping hole of guiding valve below are connected, be provided with check-valve port in the guiding valve and be communicated with the power-assisted chamber, the other end of described lever connects with the guiding valve tail end; Also be provided with fluid reservoir mouth, deflector mouth on the pump housing of guiding valve lower end, the pumping hole of the deflector mouth and the pump housing is in normal open state.
To further improvement in the technical proposal, be on the pump housing, also to be fixedly connected with energy storage, what be provided with energy storage that check valve and plunger constitute in the pump housing of the side of pump housing pumping hole charges and discharge passage and pumping hole communication, energy storage charge and discharge that passage and described guiding valve are parallel to be arranged, energy storage is communicated with by between oil circuit and check valve and the plunger; The spool of plunger protrudes in the power-assisted chamber, and the guiding valve tail end has gland can touch spool.
The working process of described hydraulic booster is described as: this hydraulic booster is installed between brake pedal and the master brake cylinder, and pedal-rod is connected with brake pedal, and the output push rod is connected with master brake cylinder.
Glancing impact, pedal-rod drives the input bar and is moved to the left, and input bar left end moves in the blind hole of boosting piston afterbody, because boosting piston is provided with pull back spring, just at first driving lever by lever support rotates around hinge-point, the lever lower end advances the pump housing with guiding valve, because guiding valve moves, closes the fluid reservoir mouth, pressure oil can not be overflowed from the power-assisted chamber, power steering fluid enters the power-assisted chamber from pumping hole, and boosting piston is moved, thereby realizes the purpose of brake boost.In braking procedure, lever support breaks away from the input bar, and normal opening one-way valve is closed, because the blind hole inner sealing has pressure oil, thereby makes input bar, pedal-rod not continue to move relative to boosting piston, plays the effect of stroke limit.Simultaneously, pressure oil also offers the deflector use by the deflector mouth.
Glancing impact not, pedal-rod unclamps, boosting piston, guiding valve return, pressure oil directly flows out from the deflector mouth and offers the deflector use, pressure oil in the power-assisted chamber is back to fluid reservoir by the fluid reservoir mouth, releases the pressure in power-assisted chamber, and hydraulic booster stops power brake.
The energy storage of establishing on the pump housing is the standby force aid system of hydraulic booster.At input pressure just often, when pressure oil entered the power-assisted chamber, pressure oil was pushed the check valve in the passage of charging and discharging of energy storage open, entered accumulator chamber from the cylindrical gap of check valve; Perhaps check valve is cut off, and the platen on the guiding valve promotes plungers valve core, opens plunger channel, and pressure oil charges into accumulator chamber from the power-assisted chamber, the energy storage accumulation of energy.When the power steering pump with intergral reservoir pressure loss, the sport of glancing impact brake pedal starts standby force aid system automatically: plungers valve core is backed down, and the pressure oil in the energy storage enters the power-assisted chamber, thereby brake boost is provided, and plays the emergency brake effect.This standby force aid system can provide power-assisted 2～3 times.
The beneficial effect of this hydraulic booster is described below:
1, because the servo-unit glancing impact, by the hydraulic coupling that provides of power steering pump with intergral reservoir, make the servo-unit input pressure obviously greater than existing conventional vacuum servo-unit, delivery pressure is big, has improved the work efficiency of system.The oil pressure speed of response is fast, controllability good.
2, when system pressure was lost, the power that common vacuum booster can only rely on chaufeur to act on the pedal was braked, and provided power-assisted to carry out emergency brake and this hydraulic booster can start standby force aid system, and more reliable performance is safer.
3, the contour structures of this hydraulic pressure place power device is compact to design, and volume is little.
4, power steering fluid is connected with deflector by hydraulic booster, is not disturbed mutually by the structure assurance power steering action and the brake boost action of hydraulic booster.
Description of drawings
Fig. 1 is the utility model hydraulic booster brake system work scheme drawing.
Fig. 2 is a M place enlarged drawing among Fig. 1.
Fig. 3 is the position view of hydraulic booster guiding valve when in running order.
Fig. 4 is the position view of hydraulic booster guiding valve when being in off position.
Among the figure, 1, guiding valve; 2, fluid reservoir mouth; 3, pumping hole; 4, deflector mouth; 5, power-assisted chamber; 6, lever; 7, connecting pin; 8, pedal-rod; 9, input bar; 10, bearing pin; 11, check valve; 12, boosting piston; 13, pull back spring; 14, output push rod; 15, gland; 16, energy storage; 17, the pump housing; 18, lock ring; 19, lever support; 20, pull back spring; 21, oil-feed aperture radially; 22, check valve; 23, check valve; 24, plunger.
The specific embodiment
Being provided with boosting piston 12 as shown in Figure 1 in the pump housing 17 cooperates with the pump housing 17 inner chambers, boosting piston 12 left ends link to each other with output push rod 14, one end of boosting piston 12 right-hand members and lever 6 is hinged by bearing pin 10, and the boosting piston right-hand member is power-assisted chamber 5, and boosting piston is provided with pull back spring 13; Pedal-rod 8 is captiveed joint with input bar 9 by lock ring 18, the connecting bore of lock ring 18 cylindricals and the pump housing 17 is sealed and matched, the cylindrical of the left end of input bar 9 and the blind hole of boosting piston 12 afterbodys are sealed and matched, be provided with check valve 22 in the left end center of input bar 9, the radially oil-feed aperture 21 of check valve is arranged on the correct position on the cylindrical of importing the bar left end, one lever support 19 is sleeved on the input bar 9, be provided with pull back spring between lever support 19 and lock ring 18, the salient point on lever support 19 and the lever 6 constitutes connecting pin 7; Being provided with guiding valve 1 below boosting piston 12 cooperates with the pump housing, form change-over valve by different seal band area, be provided with the guiding valve retracing spring between the guiding valve 1 and the pump housing, the oil suction chamber of guiding valve and pumping hole 3 are connected, be provided with unidirectional fuel feed hole in the guiding valve 1 and be communicated with power-assisted chamber 5, the other end of described lever 6 connects with guiding valve 1 tail end; Also be provided with fluid reservoir mouth 2, deflector mouth 14 on the pump housing of guiding valve lower end, deflector mouth 4 is in normal open state with the pumping hole 3 of the pump housing.
As shown in Figure 1, guiding valve 1 constitutes clearance seal with pump housing precision-fit, forms different seal band area and constitutes change-over valve.
As shown in Figure 1, 2, on the pump housing 17, also be fixedly connected with energy storage 16, what be provided with energy storage that check valve 23 and plunger 24 constitute in the pump housing of the side of pump housing pumping hole 2 charges and discharge passage and pumping hole 3 communications, energy storage charge and discharge passage and described guiding valve 1 parallel the layout, energy storage 16 is communicated with by between oil circuit and check valve 23 and the plunger 24; The spool of plunger 24 protrudes in the power-assisted chamber, and guiding valve 1 tail end has platen 15 can touch spool.Plunger 24 mainly is made up of cover of plunger, plunger, collar, steel ball, spool.Check valve 23 mainly is made up of valve body, end cap, pad, spring, steel ball and V-seal pad.
The described hydraulic booster pump housing is provided with by energy storage, energy storage and charges and discharge the standby force aid system that passage constitutes, and when system pressure is lost, can provide 2～3 times power-assisted to carry out emergency brake, makes more reliable performance, and is safer, more perfect.
When this hydraulic booster uses, be installed between brake pedal and the master brake cylinder, pedal-rod is connected with brake pedal, and the output push rod is connected with master brake cylinder.Fluid reservoir mouth 2 is connected with fluid reservoir, and pumping hole 3 is connected with power steering pump with intergral reservoir, and deflector mouth 4 is connected with deflector.
As shown in Figure 3, be the position signal of hydraulic booster guiding valve when in running order, guiding valve 1 is in control position, and fluid reservoir mouth 2 is by shutoff, and pressure oil directly flows to deflector mouth 4 from pumping hole 3, offers deflector; Simultaneously, pressure oil also flows into the power-assisted chamber from pumping hole 3 by the passage in the guiding valve.
As shown in Figure 4, the position of guiding valve signal when hydraulic booster is in off position, guiding valve 1 return, fluid reservoir mouth 2 is opened, and is communicated with the power-assisted chamber by the passage in the guiding valve, and the pressure oil in power-assisted chamber flows back to fluid reservoir, the energy assisted braking system return.Simultaneously, the passage in pumping hole 3 and the guiding valve ends, and pressure oil directly flows to deflector mouth 4 from pumping hole 3, offers deflector.
Claims (3)
1, a kind of hydraulic booster, be installed between brake pedal and the master brake cylinder, comprise the pump housing, pump cover, it is characterized in that: be provided with boosting piston in the pump housing and cooperate with pump housing inner chamber, the boosting piston left end links to each other with the output push rod, one end of boosting piston right-hand member and lever is hinged, and the boosting piston right-hand member is the power-assisted chamber, and boosting piston is provided with pull back spring; Pedal-rod and input bar are linked together by lock ring, the connecting bore of the lock ring cylindrical and the pump housing is sealed and matched, the cylindrical of the left end of input bar and the blind hole of piston tail are sealed and matched, be provided with check valve in the left end center of input bar, the radially oil-feed aperture of check valve is arranged on the correct position on the cylindrical of importing the bar left end, one lever support is sleeved on the input bar, is provided with pull back spring between lever support and lock ring, and the salient point on lever support and the lever constitutes connecting pin; Below boosting piston, be provided with guiding valve and the pump housing is sealed and matched, use by different seal band area forms change-over valve, be provided with the guiding valve retracing spring between the guiding valve and the pump housing, the oil suction chamber and the pumping hole of guiding valve below are connected, be provided with check-valve port in the guiding valve and be communicated with the power-assisted chamber, the other end of described lever connects with the guiding valve tail end; Also be provided with fluid reservoir mouth, deflector mouth on the pump housing of guiding valve lower end, the pumping hole of the deflector mouth and the pump housing is in normal open state.
2, hydraulic booster according to claim 1, it is characterized in that: be on the described pump housing, also to be fixedly connected with energy storage, what be provided with energy storage that check valve and plunger constitute in the pump housing of the side of pump housing pumping hole charges and discharge passage and pumping hole communication, energy storage charge and discharge that passage and described guiding valve are parallel to be arranged, energy storage is communicated with by between oil circuit and check valve and the plunger; The spool of plunger protrudes in the power-assisted chamber, and the guiding valve tail end has gland can touch spool.
3, hydraulic booster according to claim 1 and 2 is characterized in that: described guiding valve (1) constitutes clearance seal with pump housing precision-fit, forms different seal band area, constitutes change-over valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520098533 CN2846242Y (en) | 2005-10-26 | 2005-10-26 | Hydraulic booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520098533 CN2846242Y (en) | 2005-10-26 | 2005-10-26 | Hydraulic booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2846242Y true CN2846242Y (en) | 2006-12-13 |
Family
ID=37511660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520098533 Expired - Lifetime CN2846242Y (en) | 2005-10-26 | 2005-10-26 | Hydraulic booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2846242Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535574A (en) * | 2012-01-17 | 2012-07-04 | 中钢集团衡阳重机有限公司 | Hydraulic control system for scooptram |
| CN103018073A (en) * | 2011-09-27 | 2013-04-03 | 中国寰球工程公司 | Redundancy power source device used in decoking sampler and operation method of redundancy power source device |
| CN101885327B (en) * | 2009-05-12 | 2013-04-17 | 宁波安捷制动器有限公司 | Hydraulic boost valve |
| CN101875350B (en) * | 2009-04-30 | 2013-06-05 | 宁波安捷制动器有限公司 | Hydraulic booster valve |
| CN103231703A (en) * | 2013-05-20 | 2013-08-07 | 东风汽车公司 | Hydraulic type vehicle braking system |
| CN102039886B (en) * | 2009-10-15 | 2013-09-11 | 宁波安捷制动器有限公司 | Hydraulic booster |
| CN109747614A (en) * | 2017-11-07 | 2019-05-14 | 株式会社万都 | A kind of vacuum booster assembly |
| CN115366857A (en) * | 2022-08-29 | 2022-11-22 | 珠海博众科企业管理合伙企业(有限合伙) | Can increase hydraulic booster assembly device of discharge capacity |
-
2005
- 2005-10-26 CN CN 200520098533 patent/CN2846242Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101875350B (en) * | 2009-04-30 | 2013-06-05 | 宁波安捷制动器有限公司 | Hydraulic booster valve |
| CN101885327B (en) * | 2009-05-12 | 2013-04-17 | 宁波安捷制动器有限公司 | Hydraulic boost valve |
| CN102039886B (en) * | 2009-10-15 | 2013-09-11 | 宁波安捷制动器有限公司 | Hydraulic booster |
| CN103018073A (en) * | 2011-09-27 | 2013-04-03 | 中国寰球工程公司 | Redundancy power source device used in decoking sampler and operation method of redundancy power source device |
| CN102535574A (en) * | 2012-01-17 | 2012-07-04 | 中钢集团衡阳重机有限公司 | Hydraulic control system for scooptram |
| CN102535574B (en) * | 2012-01-17 | 2015-01-07 | 中钢集团衡阳重机有限公司 | Hydraulic control system for scooptram |
| CN103231703A (en) * | 2013-05-20 | 2013-08-07 | 东风汽车公司 | Hydraulic type vehicle braking system |
| CN103231703B (en) * | 2013-05-20 | 2016-03-02 | 东风汽车公司 | A kind of hydraulic vehicle brake system |
| CN109747614A (en) * | 2017-11-07 | 2019-05-14 | 株式会社万都 | A kind of vacuum booster assembly |
| CN115366857A (en) * | 2022-08-29 | 2022-11-22 | 珠海博众科企业管理合伙企业(有限合伙) | Can increase hydraulic booster assembly device of discharge capacity |
| CN115366857B (en) * | 2022-08-29 | 2023-12-01 | 珠海博众科企业管理合伙企业(有限合伙) | Hydraulic booster assembly device capable of increasing displacement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20061213 |
|
| EXPY | Termination of patent right or utility model |