CN101875350B - Hydraulic booster valve - Google Patents
Hydraulic booster valve Download PDFInfo
- Publication number
- CN101875350B CN101875350B CN 200910098144 CN200910098144A CN101875350B CN 101875350 B CN101875350 B CN 101875350B CN 200910098144 CN200910098144 CN 200910098144 CN 200910098144 A CN200910098144 A CN 200910098144A CN 101875350 B CN101875350 B CN 101875350B
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- valve
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- piston body
- push rod
- booster
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Abstract
The invention provides a hydraulic booster valve which comprises a valve body, wherein, the valve body is provided with a master oil inlet and a master oil return port; the master oil inlet is connected with the inlet of a change valve through a flow passage; the inlet of the change valve can be connected with an external oil port on the valve body and the inlet of the booster valve in a switching manner; when the first outlet of the change valve is connected with the external oil port on the valve body, the inlet of the booster valve is connected with the master oil return port on the valve body through a second outlet and an oil return sub-port of the change valve; one end of a piston body of the booster valve is directly or indirectly connected with a post rod of a brake mechanism, and the other end of the piston body of the booster valve is directly or indirectly connected with the valve core of the change valve; and the change valve core is connected with a push rod. In the invention, only a smaller thrust force is applied to the push rod of a pedal to generate a hydraulic assistant power, thus achieving the purpose of steady brake, stable operation, sensitive action and a small amount of components.
Description
Technical field
The present invention relates to a kind of hydraulic booster valve.
Background technology
The modern forklift truck technology brake system adopts vacuum servo more, and the foundation of brake system pressure is produced by the external force and the vacuum booster combined action that act on brake pedal, but mainly depends on vacuum booster.Step on brake pedal from chaufeur longer to the time of the foundation needs of system pressure, system response is slower; Vacuum booster when work, the operating mode of driving engine also there is certain impact; Be difficult for realizing that quantitative braking controls automatically.
Be the air-operated brake servo unit that 01821636.6 Chinese patent has improved assist as the patent No., it can absorb some boosting powers except the boosting power that is normally applied by a reaction plate.In a preferred embodiment, power is absorbed by a slide, and described slide comprises a sleeve and a plunger.Described plunger is connected on the first reaction device rigidly.Described sleeve is put on a piston that leans against Pneumatic booster.As long as the power that is applied by chaufeur is less than power in the middle of one, plunger is pushed away sleeve by a spring, and its amplitude is contended with by a pin.If surpass it, the antagonistic force of downstream hydraulic braking pipeline is with regard to Compress Spring, and makes additional Pneumatic auxiliary thrust come into effect.Owing to adopting source of the gas, so inevitably there is aforesaid defective.
Although also there is the servomechanism of some hydraulic pressure, be a kind of braking system with hydraulic assisting force of Chinese patent of 03108458.3 as the patent No., comprise a flow constant pressure valve that is connected with the deferent segment of Hydraulic Pump.This flow constant pressure valve is connected in system ground servo-unit and power steering servo-unit in parallel.The flow constant pressure valve preferentially provides the hydraulic fluid of specified amount from all hydraulic liquid of Hydraulic Pump output to brake servo unit.Be provided with by pass valve between brake port and output port.The valve body of by pass valve can be used for the threaded shaft adjustment oil pressure relief that oil pressure relief is regulated by rotation.With the patent No. be 94204637.4 Chinese patent hydraulic booster, it mainly is comprised of control cock, two-diameter piston, dash pot valve, check valve, wherein the valve piston in control cock and two-diameter piston is arranged in same valve piston cylinder, and the large piston cylinder of two-diameter piston is connected with inflow pipeline with check valve by dash pot valve simultaneously.Their existing problems are the inadequate compact and reasonable of structure, and installation volume is large, and parts are many, require further improvement.
Summary of the invention
Technical matters to be solved by this invention provides a kind of hydraulic booster valve, and its needs act on thrust less on pedal push rod, just can produce hydraulic booster, thereby realizes the purpose of sane braking, stable working, be active in one's movements, assembly is few.
the technical scheme of technical solution problem of the present invention is such: a kind of hydraulic booster valve, it includes valve body, at least be provided with total oil inlet and total return opening on valve body, it is characterized in that total oil inlet connects the import of change-over valve by runner, the import of change-over valve switchably connects the import of the upper outside oil-collecting hole of valve body and booster valve, the first outlet at change-over valve connects under the upper outside oil-collecting hole state of valve body, the import of booster valve exports the total return opening that is connected with oil return on mouthful connection valve body by second of change-over valve, piston body one end of booster valve is to be connected with the push rod of stop mechanism directly or indirectly, the piston body other end of booster valve is to link together with the reversing valve core of change-over valve directly or indirectly, and reversing valve core is connected with push rod.
As improvement, the total oil inlet on described valve body also is communicated with external hydraulic fluid port on valve body by sequence valve, with the modulating liquid pressure pressure.Described external hydraulic fluid port switches through to system.
Described push rod connects the piston rod of master brake cylinder, to transmit braking strength.
as improving again, the piston body of described booster valve is nested with the outside at reversing valve core, consisted of the piston assembly assembly, be arranged in the installation cavity of valve body, one end of piston body connects push rod, and and valve body between arrange upper spring, consist of spring cavity, total return opening is arranged on the spring cavity sidewall, between equidirectional one end of reversing valve core and piston body, little spring is set, opposite sense one end of reversing valve core connects push rod, and make and consist of the power-assisted chamber between the other end of piston body and valve body, push rod and piston body end have the pilot hole of cooperation and aperture and are communicated with the power-assisted chamber, the piston body surface has with the first flame diversion trough of inlet hole and is with the second flame diversion trough that portals, the first flame diversion trough is communicated with total oil inlet on valve body, the second flame diversion trough is communicated with spring cavity, and the center of reversing valve core has diversion cavity, the sidewall of diversion cavity has oilhole, accordingly, have left cavity and the right cavity of enlarged-diameter at the position, both sides of piston body center cavity, left cavity is communicated with portalling, right cavity is communicated with inlet hole, oilhole is under the sway of reversing valve core, be communicated with left cavity and right cavity respectively with switching.Its compact conformation is reasonable, and installation volume is little, and is lightweight, reduces costs.
At last, described push rod one end is that sphere coordinates with the piston body end, tentatively is arranged in the mounting hole of piston body end by bulge loop, and fixes with snap ring, and is easy for installation like this, and stressed can suitably the adjustment.
Compared with prior art, the invention has the advantages that: utilize hydraulic booster to replace vacuum booster, so system response is sensitiveer, can offer chaufeur more extra time; Handle lightly, can alleviate the labour intensity of chaufeur; Booster valve has certain pressure regulation effect, realizes that easily quantitative braking controls automatically; The total compact and reasonable, assembly is few, and installation volume is little, and is lightweight.
Description of drawings
Fig. 1 is one of hydraulic schematic diagram of the present invention;
Fig. 2 is two of hydraulic schematic diagram of the present invention;
Fig. 3 is block diagram of the present invention;
Fig. 4 is one of cutaway view of the present invention;
Fig. 5 is two of cutaway view of the present invention;
Fig. 6 is the piston body block diagram.
The specific embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
illustrate as Fig. 1-2, a kind of hydraulic booster valve, it includes valve body, be provided with total oil inlet P on valve body, total oil return inlet T, external hydraulic fluid port PS, total oil inlet P connects the import of change-over valve 2 by runner, total oil inlet P on valve body also is communicated with external hydraulic fluid port PS on valve body by sequence valve 1, external hydraulic fluid port PS switches through to system, the import of change-over valve 2 switchably connects the import of the upper outside oil-collecting hole PS of valve body and booster valve 3, the first outlet at change-over valve 2 connects under the upper outside oil-collecting hole Ps of valve body state, the import of booster valve 3 exports total oil return inlet T of being connected with oil return on mouthful connection valve body by second of change-over valve 2, piston body 3.1 1 ends of booster valve 3 are to be connected with the push rod 4 of stop mechanism directly or indirectly, push rod 4 connects the piston rod of master brake cylinder, piston body 3.1 other ends of booster valve 3 are to link together with the reversing valve core 2.1 of change-over valve 2 directly or indirectly, and reversing valve core 2.1 is connected with push rod 8, push rod 8 connects pedal assembly.
the concrete structure of hydraulic booster valve is such: see Fig. 3-6, the piston body 3.1 of booster valve 3 is nested with the outside at reversing valve core 2.1, consisted of the piston assembly assembly, be arranged in the installation cavity of valve body 100, one end of piston body 3.1 connects push rod 4, push rod 4 one ends are that sphere coordinates with piston body 3.1 ends, tentatively be arranged in piston body 3.1 end mounting holes by bulge loop, and fix with snap ring 10, and layout upper spring 5 between an end of piston body 3.1 and valve body, consist of spring cavity 6, total oil return inlet T is arranged on spring cavity 6 sidewalls, between equidirectional one end of reversing valve core 2.1 and piston body 3.1, little spring 7 is set, opposite sense one end of reversing valve core 2.1 connects push rod 8 by contacting mode, and make and consist of power-assisted chamber 9 between the other end of piston body 3.1 and valve body 100, push rod 8 and piston body 3.1 ends have the pilot hole 8.1 of cooperation and aperture 3.1a and are communicated with power-assisted chamber 9, piston body 3.1 surfaces have the first flame diversion trough 3.1b and the second flame diversion trough 3.1c that is with the 3.1g that portals with inlet hole 3.1f, the first flame diversion trough 3.1b is communicated with total oil inlet P on valve body, the second flame diversion trough 3.1C is communicated with spring cavity 6, and the center of reversing valve core 2.1 has diversion cavity 2.1a, the sidewall of diversion cavity has oilhole 2.1b, accordingly, have left cavity 3.1d and the right cavity 3.1e of enlarged-diameter at the position, both sides of piston body 3.1 center cavities, left cavity 3.1d is communicated with the 3.1g that portals, right cavity 3.1e is communicated with inlet hole 3.1f, oilhole 2.1b is under the sway of reversing valve core 2.1, be communicated with left cavity 3.1d and right cavity 3.1e respectively with switching.
its working process is such: when the push down on the pedal assembly, overcome the elasticity strength of little spring 7 by the reversing valve core 2.1 of push rod 8 promotion change-over valves, motion inwards, oilhole 2.1b on reversing valve core 2.1 is communicated with right cavity 3.1e, be communicated with lip-deep the first flame diversion trough 3.1b with inlet hole 3.1f of piston body 3.1 by right cavity 3.1e, be communicated with the total oil inlet P on valve body 100, and the diversion cavity 2.1a of reversing valve core 2.1 is communicated with aperture 3.1a on piston body 3.1 ends by pilot hole on push rod 8.1, thereby be communicated with the power-assisted chamber 9 between piston body 3.1 and valve body 100, like this, the hydraulic oil of front pump can continuously flow in power-assisted chamber 9, continue pushing piston body 3.1 motion to the right, overcome the spring strength in spring cavity 6, push rod 4 is moved to the right, play the hydraulic booster effect, being delivered to master brake cylinder goes, on the contrary, when Panasonic's pedal assembly, the reversing valve core 2.1 of change-over valve resets under the effect of little spring 7, motion laterally, oilhole 2.1b on reversing valve core 2.1 is communicated with left cavity 3.1d, be communicated with the second flame diversion trough 3.1c that the lip-deep band of piston body portals by left cavity 3.1d, thereby by spring cavity 6, be communicated with the total fuel return hole T on valve body, can make like this hydraulic oil in power-assisted chamber 9 by the aperture 3.1a on the piston body end, the pilot hole 8.1 of push rod 8 and diversion cavity 2.1a flow to the second flame diversion trough 3.1c that the lip-deep band of piston body portals, flow to again spring cavity 6, or further flow to total oil return inlet T on valve body, the tieback fuel tank, reset response by spring, the push rod that makes piston body 3.1 1 ends gradually to the right motion reset.
Claims (5)
1. hydraulic booster valve, it includes valve body, at least be provided with total oil inlet (P) and total return opening (T) on valve body, it is characterized in that total oil inlet (P) connects the import of change-over valve (2) by runner, the import of change-over valve (2) switchably connects the import of the upper outside oil-collecting hole of valve body (Ps) or booster valve (3), the first outlet at change-over valve (2) connects under the upper outside oil-collecting hole of valve body (Ps) state, the import of booster valve (3) exports the total return opening (T) that is connected with oil return on mouthful connection valve body by second of change-over valve (2), piston body (3.1) one ends of booster valve (3) are to be connected with the push rod (4) of stop mechanism directly or indirectly, piston body (3.1) other end of booster valve (3) is directly to link together with the reversing valve core (2.1) of change-over valve (2), and reversing valve core (2.1) is connected with push rod (8),
and the piston body (3.1) of described booster valve (3) is nested with the outside in reversing valve core (2.1), consisted of the piston assembly assembly, be arranged in the installation cavity of valve body (100), one end of piston body (3.1) connects push rod (4), and and valve body between arrange upper spring (5), consist of spring cavity (6), total return opening (T) is arranged on spring cavity (6) sidewall, between equidirectional one end of reversing valve core (2.1) and piston body (3.1), little spring (7) is set, opposite sense one end of reversing valve core (2.1) connects push rod (8), and make and consist of power-assisted chamber (9) between the other end of piston body (3.1) and valve body, push rod (8) and piston body (3.1) are communicated with power-assisted chamber (9) at pilot hole (8.1) and the aperture (3.1a) that power-assisted chamber one end has cooperation, piston body (3.1) surface has portal second flame diversion trough (3.1c) of (3.1g) of first flame diversion trough (3.1b) of band inlet hole (3.1f) and band, the first flame diversion trough (3.1b) is communicated with total oil inlet (P) on valve body, the second flame diversion trough (3.1c) is communicated with spring cavity (6), and the center of reversing valve core (2.1) has diversion cavity (2.1a), the sidewall of diversion cavity (2.1a) has oilhole (2.1b), have left cavity (3.1d) and the right cavity (3.1e) of enlarged-diameter corresponding to the position, both sides of oilhole (2.1b) at piston body (3.1) center cavity, left cavity (3.1d) is communicated with portal (3.1g), right cavity (3.1e) is communicated with inlet hole (3.1f), oilhole (2.1b) is under the sway of reversing valve core (2.1), be communicated with left cavity (3.1d) and right cavity (3.1e) respectively with switching.
2. hydraulic booster valve according to claim 1 is characterized in that the total oil inlet (P) on described valve body also is communicated with external hydraulic fluid port (Ps) on valve body by sequence valve (1).
3. hydraulic booster valve according to claim 1, is characterized in that described external hydraulic fluid port (Ps) switches through to system.
4. hydraulic booster valve according to claim 1, is characterized in that described push rod (4) connects the piston rod of master brake cylinder.
5. hydraulic booster valve according to claim 1, it is characterized in that described push rod (4) one ends are that sphere coordinates with piston body (3.1) end, tentatively be arranged in the mounting hole of piston body (3.1) end by bulge loop, and fix with snap ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910098144 CN101875350B (en) | 2009-04-30 | 2009-04-30 | Hydraulic booster valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910098144 CN101875350B (en) | 2009-04-30 | 2009-04-30 | Hydraulic booster valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101875350A CN101875350A (en) | 2010-11-03 |
| CN101875350B true CN101875350B (en) | 2013-06-05 |
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ID=43018063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910098144 Expired - Fee Related CN101875350B (en) | 2009-04-30 | 2009-04-30 | Hydraulic booster valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101875350B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079332B (en) * | 2010-12-16 | 2013-03-13 | 杭叉集团股份有限公司 | Steering and braking small-flow shared pump hydraulic system |
| DE102010064035A1 (en) * | 2010-12-23 | 2012-06-28 | Robert Bosch Gmbh | Method for controlling a wheel brake pressure of a hydraulic vehicle brake system |
| CN102979710B (en) * | 2012-04-01 | 2014-03-19 | 北汽福田汽车股份有限公司 | Pump truck and valve swinging system used for power machinery and control method thereof |
| CN105883691B (en) * | 2016-06-28 | 2018-08-28 | 安徽合力股份有限公司 | A kind of forklift hydraulic system with hydraulic assisting brake |
| CN106567959B (en) * | 2016-10-09 | 2019-02-05 | 合肥协力液压科技有限公司 | A kind of electromagnetism booster valve |
| CN106740095A (en) * | 2016-11-25 | 2017-05-31 | 合肥协力液压科技有限公司 | A kind of hydraulic booster |
| CN106627549B (en) * | 2016-11-30 | 2023-03-10 | 浙江三星机电股份有限公司 | Electric booster brake device |
| CN108202732B (en) * | 2016-12-19 | 2024-04-23 | 王军 | Oil-electricity hybrid brake switcher |
| CN109026867A (en) * | 2018-09-25 | 2018-12-18 | 杭叉集团股份有限公司 | The energy-saving hydraulic system of large-tonnage storage battery forktruck |
| CN111976960B (en) * | 2020-07-08 | 2023-01-13 | 西安航空制动科技有限公司 | Automatic flow regulator of airplane brake system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3724332A (en) * | 1972-02-10 | 1973-04-03 | Bendix Corp | Pressure limiter for hydraulic booster |
| US3782781A (en) * | 1972-06-29 | 1974-01-01 | Bendix Corp | Single fluid booster and system |
| US3898808A (en) * | 1974-06-20 | 1975-08-12 | Bendix Corp | Concentric brake booster with accumulator |
| GB1475657A (en) * | 1974-05-16 | 1977-06-01 | Aisin Seiki | Brake power booster |
| CN2846242Y (en) * | 2005-10-26 | 2006-12-13 | 东风（十堰）汽车液压动力有限公司 | Hydraulic booster |
| CN100404337C (en) * | 2004-02-06 | 2008-07-23 | 张文建 | Automobile hydraulic booster |
-
2009
- 2009-04-30 CN CN 200910098144 patent/CN101875350B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3724332A (en) * | 1972-02-10 | 1973-04-03 | Bendix Corp | Pressure limiter for hydraulic booster |
| US3782781A (en) * | 1972-06-29 | 1974-01-01 | Bendix Corp | Single fluid booster and system |
| GB1475657A (en) * | 1974-05-16 | 1977-06-01 | Aisin Seiki | Brake power booster |
| US3898808A (en) * | 1974-06-20 | 1975-08-12 | Bendix Corp | Concentric brake booster with accumulator |
| CN100404337C (en) * | 2004-02-06 | 2008-07-23 | 张文建 | Automobile hydraulic booster |
| CN2846242Y (en) * | 2005-10-26 | 2006-12-13 | 东风（十堰）汽车液压动力有限公司 | Hydraulic booster |
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| Publication number | Publication date |
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| CN101875350A (en) | 2010-11-03 |
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Granted publication date: 20130605 Termination date: 20180430 |
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