CN103010197B - Mechanical vacuum booster - Google Patents
Mechanical vacuum booster Download PDFInfo
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- CN103010197B CN103010197B CN201210494890.7A CN201210494890A CN103010197B CN 103010197 B CN103010197 B CN 103010197B CN 201210494890 A CN201210494890 A CN 201210494890A CN 103010197 B CN103010197 B CN 103010197B
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Abstract
A mechanical vacuum booster comprises a front shell, a back shell and a control valve assembly, wherein the front shell is connected with the back shell; the control valve assembly comprises a valve body, a big plunger and a proportion disk; the small plunger is arranged between the big plunger and the proportion disk; a step is arranged at the end part of the small plunger; and an automatic small plunger limiting and releasing device is arranged on a running passage of the small plunger. The mechanical vacuum booster can ensure a rapidly increasing output force at a certain input power under an emergency braking condition and can achieve pressure maintenance easily; the mechanical vacuum booster is novel in structure, simple in component structure and easy to implement; when a driver applies emergency braking, the pressure can be maintained under the condition that the input force is decreased, thus shortening the braking distance of a whole vehicle; therefore, the mechanical vacuum booster is very effective for an unskilled driver and a brake hesitator.
Description
Technical field
The invention belongs to Manufacturing Technology for Automotive Parts field, specifically, relate to a kind of mechanical vacuum booster.
Background technology
At present, relate to brake system of car parts manufacturing technology field, vacuum booster is the critical component in brake system of car, and its effect utilizes the vacuum of engine intake manifold vacuum or aux. vacuum pump generation to amplify brake pedal force, thus alleviate the power of chaufeur for braking.The cardinal principle of vacuum booster is that servo-unit has two chambeies: vacuum chamber and atmosphere chamber, and when servo-unit works, atmosphere chamber enters air, and produces draught head between vacuum chamber thus realize power-assisted effect.
In prior art, conventional vacuum servo-unit, when normal applying braking, playing power-assisted effect, alleviating the power for braking of chaufeur.But because vacuum booster of the prior art lacks emergency braking function, therefore, there is following technical matters in vacuum booster of the prior art:
1, adopt vacuum booster of the prior art, when chaufeur apply the emergency brake, when chaufeur only applies less treadle effort, the power-assisted effect of vacuum booster can not be increased rapidly, cause the braking effect of car load not obvious.
2, adopt conventional vacuum servo-unit of the prior art when apply the emergency brake, chaufeur is needed to apply larger treadle effort, particularly when treadle effort keeps incessantly, this is a test to small and weak or unskilled chaufeur, and it is tired easily to make chaufeur produce, the generation will led to a disaster time serious.
Summary of the invention
Technical matters to be solved by this invention is, adopt vacuum booster of the prior art, when chaufeur apply the emergency brake, only apply less treadle effort, the power-assisted effect of vacuum booster can not be increased rapidly, cause the braking effect of car load not obvious, and required treadle effort not easily keeps, the technical matterss such as long-time easily fatigue, and provide a kind of mechanical vacuum booster.Technical scheme of the present invention can ensure the power-assisted effect having abundance of vacuum booster, thus ensures the braking effect of car load.
Technical conceive of the present invention is, not there is emergency braking function for solving conventional vacuum servo-unit in prior art, need larger treadle effort just can make braking effect obviously and the problem such as braking force maintenance, propose a kind of mechanical vacuum booster with emergency braking function, locking and releasing mechanism is set up in the small plunger position of existing machinery formula vacuum booster, make chaufeur when apply the emergency brake, as long as meet certain horsepower input (application force of the speed × input lever of horsepower input=input lever movement) requirement, vacuum booster can export larger application force to master brake cylinder, and when Input Forces reduces, pressure is kept, thus shorten the stopping distance of car load, especially to unskilled chaufeur and the braking person of hesitating particularly effective.
Technical scheme provided by the present invention is, a kind of mechanical vacuum booster, comprise front case, rear housing, control cock assembly, described front case is connected with described rear housing, valve body, large plunger, ratio dish is included in described control cock assembly, be provided with small plunger between described large plunger and described ratio dish, the end of described small plunger is provided with step, and the operation passage of described small plunger is provided with small plunger automatic spacing and decontrol.
Described small plunger automatic spacing and decontrol comprise pin, pin spring, valve body cover, sleeve, sleeve spring, locking plate, and described valve body is set in described valve body, and be provided with pin in described valve body cover, described pin is by pin spring retainer; Described small plunger is sleeved in described sleeve, and described sleeve contacts with described locking plate.
Described control cock assembly also comprises input lever, filter screen spring perch, inner filter core, cone-shaped spring, spring perch, vacuum valve seat, Compress Spring, vacuum leather cup, ratio dish, reaction plate, valve body cover, circlip, take-off lever etc., described large plunger small end cylindrical and sleeve inner circle free-running fit, described large plunger small end end contacts with described small plunger and connects, described sleeve loads in described valve body interstitial hole, described sleeve is spacing by described sleeve spring, described sleeve step end end face is contacted with locking plate all the time, and described sleeve small end has inclined-plane; Described valve body cover is set in the large end counterbore of described valve body, and described valve body cover small end end face and described valve body counterbore end contact, described roller is loaded on described valve body and puts in radially-directed hole, and described pin is provided with inclined-plane near sleeve small end side.
In normal brake application process, described large plunger promotes described small plunger and moves forward together, described sleeve small end is connected with described pin tip contact always, and described pin is remained in described valve body cover, ensures that the power passing ratio dish of feedback, small plunger, greatly plunger pass to input lever.
In emergency brake operations process, described large plunger promotes described small plunger and moves relative to the larger distance of described pin, described pin crossed by step on described small plunger, and described sleeve moves backward under the effect of described sleeve spring, through hole during the valve body making sleeve small end depart from described pin place overlaps, described pin moves on the cylindrical of small plunger at the effect Xia Xiang center of described pin spring, contact with the step of described small plunger, carry out spacing to small plunger, stop small plunger with plunger rollback.
In emergency braking dispose procedure, along with the relatively described valve body of described large plunger is return and opens described vacuum valve, the pressure reduction between rear epitrochoidal chamber and front epitrochoidal chamber rapidly disappears, and described valve body is under the effect of return big spring, and rollback is to initial position; Described locking plate contacts with described rear housing, and it is spacing thus be forced to relatively described valve body and move forward by described rear housing, now described locking plate promotes described sleeve return, described sleeve small end inclined-plane and described pin contact of incline plane, force described pin to overcome described pin spring force and come back to original position, described small plunger is rollback under the effect of reaction plate, realizes emergency braking release.
Described pin is in the state by small plunger and housing supports at ordinary times, ensures that small plunger can be free to slide between pin.When described small plunger slip over certain displacement and described sleeve under described sleeve spring effect after rollback certain displacement, described pin, by described pin spring ejection, blocks the rollback of described small plunger.
Between described large plunger and described ratio dish, place described small plunger, described small plunger matches with described pin, realizes locking.
Adopt technical scheme provided by the present invention, can effectively solve vacuum booster of the prior art, when chaufeur apply the emergency brake, only apply less treadle effort, the power-assisted effect of vacuum booster can not be increased rapidly, cause the braking effect of car load not obvious, and required treadle effort not easily keep, the technical matterss such as long-time easily fatigue.Vacuum booster provided by the invention in an emergency braking situation, can be guaranteed when certain horsepower input, obtains a power output increased rapidly, and easily can obtain pressure maintenance.The present invention is simultaneously also advantageous in that: novel structure, component structural is simple, be easy to realize, chaufeur is when apply the emergency brake, as long as meet certain horsepower input (application force of the speed × input lever of horsepower input=input lever movement) requirement, vacuum booster can export larger application force to master brake cylinder, and when Input Forces reduces, pressure is kept, thus shorten the stopping distance of car load, especially to unskilled chaufeur and the braking person of hesitating particularly effective.
Accompanying drawing explanation
By reference to the accompanying drawings, the present invention is further illustrated:
Fig. 1 is vacuum booster assembly incipient state cutaway view of the present invention;
Fig. 2 is initial condition control cock assembly cutaway view of the present invention;
Fig. 3 is normal brake application state control cock assembly cutaway view of the present invention;
Fig. 4 is emergency braking excited state control cock assembly cutaway view of the present invention;
Fig. 5 is emergency braking hold mode control cock assembly cutaway view of the present invention;
Fig. 6 is emergency braking release position control cock assembly cutaway view of the present invention;
Wherein, 1-input lever, 2-inner filter core, 3-cone-shaped spring, 4-spring perch, 5-Compress Spring, 6-vacuum leather cup, the large plunger of 7-, 7a-large plunger atmospheric valve seat boss, 8-locking plate, 9-small plunger, 10-pin, 11-O RunddichtringO, 12-ratio dish, 13-take-off lever, 14-big spring, 15-circlip, 16-reaction plate, epitrochoidal chamber (vacuum chamber) before 17-, 18-front case, 19-diaphragm dish, 20-epithelium, epitrochoidal chamber (atmosphere chamber) after 21-, 22-rear housing, 23-pin spring, 24-valve body cover, 25-sleeve spring, 26-sleeve, 27-O RunddichtringO, 28-vacuum valve seat, 29-valve body, vacuum valve seat boss in 29a-valve body, 30-filter screen spring perch.
Detailed description of the invention
As shown in figures 1 to 6, a kind of mechanical vacuum booster with emergency braking function of technical scheme provided by the present invention, its control cock assembly comprises valve body 29, input lever 1, filter screen spring perch 30, cone-shaped spring 3, spring perch 4, Compress Spring 5, vacuum leather cup 6, vacuum valve seat 28, large plunger 7, small plunger 9, locking plate 8, sleeve 26, sleeve spring 25, valve body cover 24, pin 10, pin spring 23, ratio dish 12, reaction plate 16, take-off lever 13, circlip 15, described input lever 1 is successively through filter screen spring perch 30, cone-shaped spring 3, spring perch 4, Compress Spring 5, vacuum leather cup 6, its bulb part stretches in large plunger 7 counterbore, input lever 1 and large plunger 7 pass through together with riveting, but input lever 1 can be rotated at a certain angle relative to large plunger 7, the step that step in described input lever 1 is pressed in filter screen spring perch 30 inwall contacts left-hand thread connect, described spring perch 4 is pressed on vacuum valve seat 28 inner convex platform end face, cone-shaped spring 3 is between filter screen spring perch 30 and spring perch 4, described vacuum leather cup 6 one end has internal buckle ring to be positioned on vacuum valve seat 28 inner cylinder face and is buckled in the circular groove of spring perch 4 lower end, the other end end face of vacuum leather cup 6 contacts with vacuum valve seat boss 29a in valve body and connects, vacuum valve is formed between vacuum valve seat boss 29a in the end face of described vacuum leather cup 6 and valve body, described vacuum valve seat 28 end face to lean against in valve body 29 on step surface, circular groove is had outside vacuum valve seat 28, assembling O RunddichtringO 27, seal with extraneous with epitrochoidal chamber after ensureing servo-unit 21, the atmospheric valve seat boss that described large plunger 7 is held greatly and vacuum leather cup 6 end contact, air valve is formed between atmospheric valve seat boss and vacuum leather cup 6 end face, described large plunger 7 small end cylindrical and sleeve 26 inner circle free-running fit, small end end contacts with small plunger 9 and connects, described locking plate 8 is through the radial slot in the middle part of valve body 29, free-running fit in the middle part of inner circle and large plunger 7 in the middle part of locking plate 8, described sleeve 26 loads in valve body 29 interstitial hole, sleeve 26 is spacing by sleeve spring 25, described sleeve 26 step end end face is contacted with locking plate 8 all the time, described sleeve 26 small end has inclined-plane, described valve body cover 24 is set in valve body 29 and holds greatly in counterbore, valve body overlaps 24 small end end faces and valve body 29 counterbore end contact, described roller to be loaded on valve body cover 24 in radially-directed hole, pin 10 is spacing by pin spring 23, described pin 10 has inclined-plane near sleeve 26 small end side, in non-emergent braking mode, pin 10 is withstood on sleeve 26 cylindrical by pin spring 23, described small plunger 9 is loaded in sleeve 26 endoporus, small plunger 9 has step end to be connected with ratio dish 12 toe contact, described ratio dish 12 is set in valve body cover 24, described valve body cover 24 is held in counterbore greatly and is loaded reaction plate 16, described take-off lever 13 greatly end end face is connected with reaction plate 16 end contact, described take-off lever 13 is spacing by described circlip 15, described circlip 15 is fitted in valve body 29 end by big spring 14.In normal brake application process, large small plunger 9 moves less displacement together relative to valve body 29, sleeve 26 small end can not be pushed up from the pin 10 in valve body cover 24 by sleeve spring 25 completely, small plunger 9 step surface does not cross pin 10, during pin 10 still keeps, valve body overlaps in 24 radial holes, pin 10 near center-side by sleeve 26 and small plunger 9 step spacing, in emergency braking process, chaufeur tramples brake pedal fast with certain speed, input lever 1 is driven to move forward fast, and it is larger apart from moving relative to pin 10 to drive large plunger 7 to promote small plunger 9, pin 10 crossed by step on small plunger 9, meanwhile sleeve 26 moves backward under the effect of sleeve spring 25, thus the valve body making sleeve 26 small end leave pin 10 place completely overlaps the through hole in 24, pin 10 moves on the cylindrical of small plunger 9 at the effect Xia Xiang center of pin spring 23, block the step of small plunger 9, stop small plunger 9 with large plunger 7 rollback, thus cut-out feedback force, realize easily keeping air valve opening under less treadle effort, thus realize air and fully enter into servo-unit epitrochoidal chamber, make that servo force is instantaneous to be reached maximum and can easily maintain.
As accompanying drawing 1, shown in 2, input lever 1 is successively through filter screen spring perch 30, cone-shaped spring 3, spring perch 4, Compress Spring 5, vacuum leather cup 6, the bulb part of input lever 1 stretches in the counterbore of large plunger 7, input lever 1 and large plunger 7 pass through together with riveting, but input lever 1 can be rotated at a certain angle relative to large plunger 7, the step that step in input lever 1 is pressed in filter screen spring perch 30 inwall contacts left-hand thread connect, spring perch 4 is pressed on vacuum valve seat 28 inner convex platform end face, cone-shaped spring 3 is between filter screen spring perch 30 and spring perch 4, vacuum leather cup 6 one end has internal buckle ring to be positioned on vacuum valve seat 28 inner cylinder face and is buckled in the circular groove of spring perch 4 lower end, the other end end face of vacuum leather cup 6 contacts with vacuum valve seat boss 29a in valve body 29 and connects, vacuum valve is formed between vacuum valve seat boss 29a in the end face of vacuum leather cup 6 and valve body 29, described vacuum valve seat 28 end face to lean against in valve body 29 on step surface, circular groove is had outside vacuum valve seat 28, assembling O RunddichtringO 27, to ensure that servo-unit epitrochoidal chamber seals, the atmospheric valve seat boss 7a that large plunger 7 is held greatly and vacuum leather cup 6 end contact, air valve is formed between atmospheric valve seat boss 7a and vacuum leather cup 6 end face, large plunger 7 small end cylindrical and sleeve 26 endoporus free-running fit, large plunger 7 small end end contacts with small plunger 9 and connects, locking plate 8 is through the radial slot in the middle part of valve body 29, free-running fit in the middle part of endoporus and large plunger 7 in the middle part of locking plate 8, sleeve 26 loads in valve body 29 interstitial hole, sleeve spring 25 one end withstands on bottom valve body 29 endoporus, the other end withstands on the end face of locking plate 8, sleeve 26 is spacing by sleeve spring 25, sleeve 26 step end end face is contacted with locking plate 8 all the time, valve body cover 24 is set in valve body 29 and holds greatly in counterbore, valve body overlaps 24 small end end faces and holds counterbore inner end surface to contact greatly with valve body 29, pin 10 is set in valve body and overlaps in 24 radially-directed holes, pin 10 is by the spring-force driven dual of pin spring 23, in non-emergent braking mode, pin 10 is withstood on sleeve 26 cylindrical by pin spring 23, small plunger 9 is loaded in sleeve 26 endoporus, small plunger 9 has step end to be connected with ratio dish 12 toe contact, ratio dish 12 is set in valve body cover 24, valve body cover 24 is held in counterbore greatly and is loaded reaction plate 16, take-off lever 13 greatly end end face is connected with reaction plate 16 end contact, take-off lever 13 is spacing by circlip 15, circlip 15 is fitted on valve body 29 by big spring 14.
1. normal brake application process
With reference to accompanying drawing 1,2,3, when starting to brake, the Input Forces that brake pedal passes to input lever 1 overcomes cone-shaped spring 3 drag, promote input lever 1 to move forward, input lever 1 promotes again large plunger 7 and moves less displacement relative to valve body 29 with small plunger 9 together with valve body cover 24, and valve body 29 is relative motionless with valve body cover 24.Input lever 1 promotes large plunger 7 and moves forward, vacuum leather cup 6 is spacing by the vacuum valve seat boss 29a in valve body 29, atmospheric valve seat boss 7a on large plunger 7 is separated with the end face of vacuum leather cup 6, air valve open, rear epitrochoidal chamber 21 starts to enter air, produce pressure reduction between rear epitrochoidal chamber 21 (atmosphere chamber) and front epitrochoidal chamber 17 (vacuum chamber), promote valve body 29 and move forward.Sleeve 26 heads on locking plate 8 and moves backward under the effect of sleeve spring 25, due to normal brake application, large plunger 7 is little relative to the displacement of valve body 29 and 24 movements of valve body cover, the distance that the relative valve body 29 of sleeve 26 and valve body overlap 24 rollbacks is also less, sleeve 26 small end can not push up completely from the pin 10 in valve body cover 24, and pin 10 is still pressed on sleeve 26 small end external cylindrical surface by pin spring 23.Meanwhile, large plunger 7 is little relative to the displacement of valve body 29 and 24 movements of valve body cover, large plunger 7 promotes again small plunger 9 and moves, small plunger 9 is also little relative to the displacement of valve body cover 24 movements, the step that small plunger 9 is held greatly can not cross the edge of pin 10, and small plunger 9 can free rollback after brake release.Along with air valve open, rear epitrochoidal chamber 21 starts to enter air, servo-unit starts power-assisted, valve body 29 moves forward, when brake pedal, to rest on a certain position motionless, input lever 1 and large plunger 7 slack, valve body 29 continues reach under the effect of pressure reduction, vacuum leather cup 6 under the effect of Compress Spring 5 along with the vacuum valve seat boss 29a on valve body 29 moves together until vacuum leather cup 6 end face contacts with the atmospheric valve seat boss 7a on large plunger 7, air valve closing, now air valve, vacuum valve is all in closed condition, servo-unit is in brake compensation state.
Loosen the brake, Input Forces diminishes, and input lever 1 moves backward under the effect of cone-shaped spring 3, and drives large plunger 7 to move backward, and small plunger 9 also moves backward under the effect of feedback force.Along with large plunger 7 moves backward, overcome the drag of Compress Spring 5, atmospheric valve seat boss 7a on large plunger 7 drives vacuum leather cup 6 also to move backward, vacuum leather cup 6 end face is separated with vacuum valve seat boss 29a in valve body 29, vacuum break valve, rear epitrochoidal chamber 21 and front epitrochoidal chamber 17 communicate, and two chambeies start pressure release, under the effect of big spring 14, valve body 29 starts to move backward.After locking plate 8 contacts with rear housing 22, locking plate 8 is that is limited slack, by the spacing stopping rollback of locking plate 8 end face in the middle part of large plunger 7, and now, valve body 29 continues to move backward under the effect of big spring 14, until valve body vacuum valve seat boss 29a and vacuum leather cup 6 end contact, closes vacuum valve, valve body moves after stopping, and servo-unit control cock assembly has been got back to again and do not braked initial condition position shown in Fig. 2.
2. emergency braking working process
1) emergency braking excited state
With reference to accompanying drawing 1, 2, 4, during emergency braking, brake pedal is stepped on rapidly, input lever 1 drives large plunger 7, small plunger 9 relatively valve body 29 and valve body cover 24 has larger relative displacement, atmospheric valve seat boss 7a now on large plunger 7 is separated with vacuum leather cup 6 end face, air valve open, rear epitrochoidal chamber 21 enters air, servo-unit starts power-assisted, promotion valve body 29 and valve body cover 24 move forward, sleeve 26 rollback backward under the effect of sleeve spring 25, sleeve 26 small end pushes up from the pin 10 in valve body cover 24 completely, pin 10 diametrically can not be spacing by sleeve 26, meanwhile, because small plunger 9 moves larger displacement relative to valve body cover 24, the step that small plunger 9 is held greatly fully passes over the edge of pin 10, such pin 10 moves to centre under the effect of pin spring 23, pin 10 top is pressed on the external cylindrical surface of small plunger 9, emergency braking function is excited, as shown in Figure 4.After emergency braking function is excited, the power fed back by reaction plate 16, major part passes to valve body 29 through ratio dish 12, small plunger 9, pin 10, valve body cover 24, and the power passing to large plunger 7 is very little, and then the power feeding back to brake pedal is very little.
2) emergency braking hold mode
With reference to accompanying drawing 1, 5, after emergency braking function is excited, if Input Forces reduces, feedback force can promote small plunger 9 and move backward, the large end stand rank of small plunger 9 contact with pin 10 edge, pin 10 is overlapped again 24 spacing by valve body, along with Input Forces reduces further, large plunger 7 can continue to move backward, small plunger 9 is by pin 10, valve body cover 24, valve body 29 moves by spacing can not continuation backward, now start there is gap between large plunger 7 and small plunger 9, if Input Forces continues to reduce, large plunger 7 continues to move until atmospheric valve seat boss 7a and vacuum leather cup 6 end contact close air valve backward relative to valve body 29, in the process, small plunger 9 is valve body cover 24 relatively, valve body 29 is static, gap between small plunger 9 and large plunger 7 is increasing, as long as the Input Forces passing to servo-unit input lever 1 is greater than the drag of cone-shaped spring 3, air valve maintains and often opens, pressure reduction between rear epitrochoidal chamber 21 and front epitrochoidal chamber 17 is maintained, although Input Forces reduces, but the power-assisted of servo-unit does not reduce, the High power output part of servo-unit is kept, the keep-process of Here it is emergency braking.
3) emergency braking release position
With reference to accompanying drawing 1,6, release brake pedal, input lever 1 is under the effect of cone-shaped spring 3, large plunger 7 is driven to move backward, move to atmospheric valve seat boss 7a to contact with vacuum leather cup 6, and the drag overcoming Compress Spring 5 by the end face top of vacuum leather cup 6 from valve body vacuum valve seat boss 29a, vacuum break valve, rear epitrochoidal chamber 21 communicates with front epitrochoidal chamber 17, servo-unit two epitrochoidal chamber starts pressure release, valve body 29 starts rollback under the effect of big spring 14, now, with locking plate 8 end contact in the middle part of large plunger 7.Along with valve body 29 constantly rollback, when locking plate 8 encounters rear housing 22, locking plate 8 is limited, large plunger 7 and locking plate 8 stop mobile, now valve body 29 continues rollback, overcome the drag of sleeve spring 25, locking plate 8 promotes sleeve 26 valve body 29 relatively, valve body cover 24 moves forward, the inclined-plane of sleeve 26 small end contacts with pin 10, along with valve body 29 continues rollback, pin 10 pushes up back in the radial direction through hole in valve body cover 24 by the drag that sleeve 26 small end inclined-plane overcomes pin spring 23, the step that pin 10 is held greatly with small plunger 9 is separated, the step of small plunger 9 is no longer spacing by pin 10, small plunger 9 is at reaction plate 16, move backward relative to valve body cover 24 under the effect of the feedback force that ratio dish 12 transmits and contact with large plunger 7, emergency braking function is removed.When after after pressure reduction between epitrochoidal chamber 21 and front epitrochoidal chamber 17 thoroughly disappears, valve body vacuum valve seat boss 29a again with vacuum leather cup 6 end contact, air valve and vacuum valve are all closed, and servo-unit control cock assembly has got back to again the initial condition shown in Fig. 2.
Above-mentioned embodiment is used for explaining and the present invention is described; instead of to unique restriction of the present invention; the related variation scheme that the basis of technical conceive of the present invention is carried out is all in protection scope of the present invention; the any use amendment make invention and change, all fall within protection scope of the present invention.
Claims (7)
1. a mechanical vacuum booster, comprise front case (18), rear housing (22), control cock assembly, described front case (18) is connected with described rear housing (22), it is characterized in that, valve body (29) is included in described control cock assembly, large plunger (7), ratio dish (12), small plunger (9) is provided with between described large plunger (7) and described ratio dish (12), the end of described small plunger (9) is provided with step, the operation passage of described small plunger (9) is provided with small plunger (9) automatic spacing and decontrol, described small plunger 9 automatic spacing and decontrol comprise pin (10), pin spring (23), valve body cover (24), sleeve (26), sleeve spring (25), locking plate (8), described valve body cover (24) is arranged in described valve body (29), be provided with pin (10) in described valve body cover (24), described pin (10) is spacing by pin spring (23), described small plunger (9) is sleeved in described sleeve (26), and described sleeve (26) contacts with described locking plate (8).
2. a kind of mechanical vacuum booster according to claim 1, it is characterized in that, described control cock assembly also comprises input lever (1), filter screen spring perch (30), inner filter core (2), cone-shaped spring (3), spring perch (4), vacuum valve seat (28), Compress Spring (5), vacuum leather cup (6), ratio dish (12), reaction plate (16), valve body cover (24), circlip (15), take-off lever (13), described large plunger (7) small end cylindrical and sleeve (26) inner circle free-running fit, described large plunger (7) small end end contacts with described small plunger (9) and connects, described sleeve (26) loads in described valve body (29) interstitial hole, described sleeve (26) is spacing by described sleeve spring (25), described sleeve (26) step end end face is contacted with locking plate (8) all the time, described sleeve (26) small end has inclined-plane, described valve body cover (24) is set in described valve body (29) and holds greatly in counterbore, described valve body cover (24) small end end face and described valve body (29) counterbore end contact, described pin (10) is set in the upper radially-directed hole of described valve body cover (24), and described pin (10) is provided with inclined-plane near sleeve (26) small end side.
3. a kind of mechanical vacuum booster according to claim 2, it is characterized in that, in normal brake application process, described large plunger (7) promotes described small plunger (9) and moves forward together, described sleeve (26) small end is connected with described pin (10) tip contact always, the described pin (10) made remains in described valve body cover (24), ensures that the power passing ratio dish (12) of feedback, small plunger (9), greatly plunger (7) pass to input lever (1).
4. a kind of mechanical vacuum booster according to claim 2, it is characterized in that, in emergency brake operations process, described large plunger (7) promotes described small plunger (9) and moves relative to the larger distance of described pin (10), described pin (10) crossed by step on described small plunger (9), and described sleeve (26) moves backward under the effect of described sleeve spring (25), sleeve (26) small end is made to depart from through hole in the valve body cover (24) at described pin (10) place, described pin (10) moves on the cylindrical of small plunger (9) at the effect Xia Xiang center of described pin spring (23), contact with the step of described small plunger (9), carry out spacing to small plunger (9), stop small plunger (9) with plunger rollback.
5. a kind of mechanical vacuum booster according to claim 2, it is characterized in that, in emergency braking dispose procedure, along with the relatively described valve body (29) of described large plunger (7) is return and opens described vacuum valve, pressure reduction between rear epitrochoidal chamber (21) and front epitrochoidal chamber (17) rapidly disappears, described valve body (29) is under the effect of return big spring (14), and rollback is to initial position; Described locking plate (8) contacts with described rear housing (22), and by described rear housing (22) spacing thus be forced to relatively described valve body (29) reach, now described locking plate (8) promotes described sleeve (26) return, described sleeve (26) small end inclined-plane and described pin (10) contact of incline plane, force described pin (10) to overcome described pin spring (23) power and come back to original position, described small plunger (9) rollback under the effect of reaction plate (16), realizes emergency braking release.
6. a kind of mechanical vacuum booster according to claim 3 or 4 or 5, it is characterized in that, described pin (10) is in the state supported by small plunger (9) and sleeve (26) at ordinary times, ensures that small plunger (9) can be free to slide between pin (10).
7. a kind of mechanical vacuum booster according to claim 6, it is characterized in that, when described small plunger (9) slip over certain displacement and described sleeve (26) under described sleeve spring (25) effect after rollback certain displacement, described pin (10) is ejected by described pin spring (23), blocks the rollback of described small plunger (9).
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| CN201210494890.7A CN103010197B (en) | 2012-11-28 | 2012-11-28 | Mechanical vacuum booster |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210494890.7A CN103010197B (en) | 2012-11-28 | 2012-11-28 | Mechanical vacuum booster |
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| CN103010197A CN103010197A (en) | 2013-04-03 |
| CN103010197B true CN103010197B (en) | 2015-04-22 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103419766B (en) * | 2013-08-07 | 2015-06-24 | 京西重工（上海）有限公司 | Vacuum booster reaction rod retaining appliance and reaction rod retaining method |
| JP6197819B2 (en) * | 2015-03-31 | 2017-09-20 | 株式会社アドヴィックス | Negative pressure booster |
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| CN201472361U (en) * | 2009-07-17 | 2010-05-19 | 芜湖伯特利汽车安全系统有限公司 | Mechanical vacuum booster with emergency braking function |
| CN102167025A (en) * | 2011-03-18 | 2011-08-31 | 芜湖伯特利汽车安全系统有限公司 | Mechanical vacuum booster for vehicle |
| CN203157981U (en) * | 2012-11-28 | 2013-08-28 | 芜湖伯特利汽车安全系统有限公司 | Mechanical vacuum booster |
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| CN201472361U (en) * | 2009-07-17 | 2010-05-19 | 芜湖伯特利汽车安全系统有限公司 | Mechanical vacuum booster with emergency braking function |
| CN102167025A (en) * | 2011-03-18 | 2011-08-31 | 芜湖伯特利汽车安全系统有限公司 | Mechanical vacuum booster for vehicle |
| CN203157981U (en) * | 2012-11-28 | 2013-08-28 | 芜湖伯特利汽车安全系统有限公司 | Mechanical vacuum booster |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103010197A (en) | 2013-04-03 |
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Address after: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 19 Taishan Road Patentee after: WUHU BOTELI AUTOMOBILE SAFETY SYSTEM CO., LTD. Address before: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 19 Taishan Road Patentee before: Wuhu Bethel Automotive Secure Systems Ltd. |