CN202716865U - Automobile vacuum power booster with emergency auxiliary braking function - Google Patents
Automobile vacuum power booster with emergency auxiliary braking function Download PDFInfo
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- CN202716865U CN202716865U CN 201220380665 CN201220380665U CN202716865U CN 202716865 U CN202716865 U CN 202716865U CN 201220380665 CN201220380665 CN 201220380665 CN 201220380665 U CN201220380665 U CN 201220380665U CN 202716865 U CN202716865 U CN 202716865U
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- piston body
- push rod
- valve seat
- control valve
- sleeve
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Abstract
The utility model discloses an automobile vacuum power booster with an emergency auxiliary braking function. The automobile vacuum power booster with the emergency auxiliary braking function comprises a piston body, a front shell, a back shell, a skin film, a main cylinder push rod and a return spring. The front end of the outer portion of the piston body is connected with the skin film, and the front shell and the back shell are separated by the skin film to form a vacuum cavity and an atmosphere cavity. A control valve seat assembly which comprises a control valve seat and a push rod is placed on a vacuum valve seat at the rear end inside the piston body, the main cylinder push rod is arranged on the front end of a rubber reaction plate, the front end of the main cylinder push rod is inserted into a hydraulic main cylinder piston, an ejector rod baffle is sleeved outside the main cylinder push rod, the return spring is placed inside the vacuum cavity and is connected with the front shell and the ejector rod baffle, a limit hole is arranged in a lateral face of the middle portion of the piston body, a locking plate passes through the limit hole and clamps in a card slot at the little end of the control valve seat and a control mechanism is installed in a piston body big hole between the end face of the little end of the control valve seat and the rubber reaction plate. The emergency auxiliary braking function of the automobile power booster is achieved by adoption of the spring and a rolling bead piece. The automobile vacuum power booster with the emergency auxiliary braking function has the advantages of having long service life, and being simple in processing technology, convenient to install and low in cost.
Description
Technical field
The utility model relates to a kind of automobile brake boosting device, especially relates to a kind of automobile vacuum booster with urgent auxiliary brake function.
Background technology
Vacuum booster is the critical component of brake system of car, is the guarantee of automotive safety.Traditional vacuum servo-unit principle of work is the vacuum of utilizing automotive engine or vacuum pump to produce, increases the thrust that acts on the master brake cylinder by the difference of pressure between former and later two different operating chamber epitheliums, reaches the vacuum servo effect.
There is a distinct disadvantage in the conventional automobile vacuum booster of tradition when implementing braking, namely when running into the accident emergency brake, usually not enough because of brake pedal force, cause the atmosphere valve opening inadequate, suction quantity is sufficient not, and front and back epitrochoidal chamber difference of pressure is less, the braking response overlong time occurs, the phenomenon of poor stop causes great hidden danger to automotive safety.
This shortcoming when implementing braking for conventional automobile vacuum booster, existing automobile vacuum booster auxiliary braking system such as patent publication No. 202016460 U and patent 201882070 U etc. have solved this problem, but all exist cost high, service life is short, the shortcoming of poor reliability.
Summary of the invention
For the problem that exists in the background technology, the purpose of this utility model is to provide a kind of automobile vacuum booster with urgent auxiliary brake function, and it possesses the conventional brake function under general case, in case of emergency has emergency braking function simultaneously.
For achieving the above object, the technical solution adopted in the utility model is:
The utility model comprises piston body, fore shell, back cover, epithelium, master cylinder push rod and pull back spring; The piston body outer front end links to each other with epithelium, and epithelium separates a vacuum chamber of formation and an atmosphere chamber with fore shell and back cover; The control valve seat assembly that comprises control valve seat and push rod places on the vacuum valve seat of the inner rear end of piston body; The rubber reaction plate places the piston body interior forward end and links to each other with control valve seat small end end face; Rubber reaction plate front end is provided with master cylinder push rod, and the master cylinder push rod front end inserts in the hydraulic main cylinder piston; The master cylinder push rod outer cover has the push rod baffle plate; Pull back spring places vacuum chamber and links to each other with the push rod baffle plate with fore shell; Limited location hole, side, piston body middle part, locking plate passes spacing hole, and is stuck in the control valve seat small end draw-in groove; In the piston body macropore between control valve seat small end end face and rubber reaction plate control mechanism is housed.
Described control mechanism comprises that endoporus and profile are notch cuttype support cylindraceous, O type circle, metal gasket, sleeve spring, sleeve and the grooming ring assembly that is comprised of conv dish, grooming ring spring, grooming ring and tie bolt (204);
The large end cylinder of support is contained in the described piston body opening and with O type circle and seals, and metal gasket is close on the shoulder of support macropore, and described rubber reaction plate is close on the metal gasket; Conv dish small end cylinder surface cover has the grooming ring spring, is bolted between conv dish and the grooming ring, and the large end of the conv dish face of cylinder is installed in the metal gasket hole, and it is little that grooming ring is installed in support
EndIn the hole, support small end cylinder outer cover has sleeve, and bush outer sleeve has sleeve spring, and grooming ring links to each other with ball with sleeve; Gapped J between grooming ring large stomidium bottom surface and the described conv dish small end end face, the small end of control valve seat are installed in the scheduling annular distance away from the conv dish.
Connecting with circular arc between the two cylindrical surface in the described grooming ring assembly on the grooming ring, is connected with cambered surface and connects with circular arc in the face of cylinder of sleeve lining.
Radial equipartition has N bar ball slideway on the described support small end thin-walled, and ball radially slides in described ball slideway, and each ball links to each other with grooming ring with sleeve respectively.
Be provided with seal ring between described support and the described piston body opening.
The beneficial effect that the utlity model has is:
The utility model is equipped with a control mechanism in conventional vacuum booster inside, when common braking, has conventional vacuum booster braking function, when emergency braking, the master cylinder hydraulic pressure counter-force that hydraulic main cylinder transmission is returned is delivered on piston body and the epithelium by control mechanism, servo force by vacuum booster overcomes, and chaufeur only need to overcome spring, air valve power can obtain the max vacuum power-assisted.Thereby reach urgent power-assisted purpose, avoid in case of emergency occurring the braking force deficiency, the situation that stopping distance is excessive.
The utility model adopts the universal machine parts such as spring and ball to realize the urgent auxiliary brake function of automobile vacuum booster, long service life, processing technology simple ripe, easy for installation, cost is low.
Description of drawings
Fig. 1 is constructional drawing of the present utility model.
Fig. 2 is controlling machine composition of the present utility model.
Fig. 3 is grooming ring assembly figure of the present utility model.
Fig. 4 is vacuum booster view when control mechanism does not start among the embodiment.
Fig. 5 is the vacuum booster view after control mechanism starts among the embodiment.
Among the figure: 1, fore shell, 2, piston body, 3, vacuum chamber, 4, epithelium, 5, back cover, 6, atmosphere chamber, 7, control valve seat, 8, push rod, 9, control mechanism, 10, locking plate, 11, the rubber reaction plate, 12, the push rod baffle plate, 13, master cylinder push rod, 14, pull back spring, 101, support, 102, O type circle, 103, metal gasket, 104, sleeve spring, 105, sleeve, 106, the grooming ring assembly, 107, ball, 201, conv dish, 202, the grooming ring spring, 203, grooming ring, 204, bolt.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
The automobile vacuum booster of the urgent auxiliary brake function of band described in the utility model such as Fig. 1, Fig. 2, shown in Figure 3, comprises piston body 2, fore shell 1, back cover 5, epithelium 4, master cylinder push rod 13 and pull back spring 14; Piston body 2 outer front end link to each other with epithelium 4, and epithelium 4 separates a vacuum chamber 3 of formation and an atmosphere chamber 6 with fore shell 1 and back cover 5; The control valve seat assembly that comprises control valve seat 7 and push rod 8 places on the vacuum valve seat of piston body 2 inner rear ends; Rubber reaction plate 11 places piston body 2 interior forward end and links to each other with control valve seat 7 small end end faces; Rubber reaction plate 11 front ends are provided with master cylinder push rod 13, and master cylinder push rod 13 front ends insert in the hydraulic main cylinder piston; Master cylinder push rod 13 outer cover have push rod baffle plate 12; Pull back spring 14 places vacuum chamber 3 and links to each other with push rod baffle plate 12 with fore shell 1; Limited location hole, side, piston body 2 middle part, locking plate 10 passes spacing hole, and is stuck in the control valve seat 7 small end draw-in grooves.In piston body 2 macropores between control valve seat 7 small end end faces and rubber reaction plate 11 control mechanism 9 is housed.
As shown in Figures 2 and 3, connecting with circular arc between the two cylindrical surface in the grooming ring assembly 106 on the grooming ring 203, is connected with cambered surface and connects with circular arc in the face of cylinder of sleeve 105 inwalls.Ball 107 can be level and smooth in the motion of the face of cylinder and cambered surface and locking.
The O type circle 102 that seals is arranged between support 101 and piston body 2.
Be divided into following two kinds of braking modes during the automobile vacuum booster automobile vacuum booster implementation of the urgent auxiliary brake function of band described in the utility model: conventional brake, emergency braking, the below illustrates respectively two kinds of braking modes:
One, conventional brake: as shown in Figure 4, when treadle effort that chaufeur applies through Input Forces that push rod 8 acts on servo-unit less than control mechanism 9 in during grooming ring spring 202 preset value, this moment, grooming ring spring 202 predetermincd tensions were constant, grooming ring 203 remains J with conv dish 201 gaps, relative displacement is 0 between grooming ring 203 and the piston body 2, control mechanism 9 is inoperative, and whole control mechanism 9 and piston body 2 are servo-actuated together, at this moment work the same with the traditional vacuum servo-unit.
Two, emergency braking: emergency braking is started by control mechanism 9 and two processes that reset form a working cycle.
Start-up course: as shown in Figure 5, the rapid push down on the pedal of chaufeur, when the Input Forces that acts on servo-unit through push rod 8 during greater than preset value, vacuum valve cuts out rapidly, atmos-valve is opened, control mechanism 9 begins to trigger, grooming ring 203 relative piston body 2 forward pitchs are from J, grooming ring 203 and conv dish 201 gap J are reduced to 0 and are close to, ball 107 radially inwardly slides in the support ball slideway, and roll into cambered surface locking also from the axial circular cylinder of grooming ring 203, meanwhile, sleeve 105 under the effect of sleeve spring 104 relatively support 101 stretch outward.At this moment, the hydraulic counter force major part that master cylinder transmission is returned is overcome by vacuum booster system servo force, chaufeur can be kept the maximum opening of atmos-valve by very little power, so that atmosphere chamber 6 obtains the full admission amount, rapidly power output is jumped and increase to the max vacuum power-assisted, reach the purpose of emergency braking.
Reseting procedure: after the end of braking, reducing of the treadle effort that applies along with chaufeur, atmos-valve cuts out, vacuum valve is opened, atmosphere chamber 6 Airs are pumped, the vacuum booster servo force disappears, under the effect of master cylinder push rod 13 and pull back spring 14, control mechanism 9, piston body 2, control valve seat 7 is rollback together, when locking plate 10 is run into back cover 5, locking plate 10 stop motions, sleeve 105 resets to initial condition with sleeve spring 104 compressions under locking plate 10 effects, and unbalanced ball 107 is reset to initial position under grooming ring 203 effects, meanwhile grooming ring spring 202 is elongated to Pre strained state from most compressed state, finish the one action circulation, servo-unit is finished snap catch and brake off thereof, reaches the purpose of emergency braking.
The above-mentioned specific embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (5)
1. the automobile vacuum booster with urgent auxiliary brake function comprises piston body (2), fore shell (1), back cover (5), epithelium (4), master cylinder push rod (13) and pull back spring (14); Piston body (2) outer front end links to each other with epithelium (4), and epithelium (4) separates a formation vacuum chamber (3) and an atmosphere chamber (6) with fore shell (1) and back cover (5); The control valve seat assembly that comprises control valve seat (7) and push rod (8) places on the vacuum valve seat of the inner rear end of piston body (2); Rubber reaction plate (11) places piston body (2) interior forward end and links to each other with control valve seat (7) small end end face; Rubber reaction plate (11) front end is provided with master cylinder push rod (13), and master cylinder push rod (13) front end inserts in the hydraulic main cylinder piston; Master cylinder push rod (13) outer cover has push rod baffle plate (12); Pull back spring (14) places vacuum chamber (3) and links to each other with push rod baffle plate (12) with fore shell (1); Limited location hole, side, piston body (2) middle part, locking plate (10) passes spacing hole, and is stuck in control valve seat (7) the small end draw-in groove; It is characterized in that: in piston body (2) macropore between control valve seat (7) small end end face and rubber reaction plate (11) control mechanism (9) is housed.
2. a kind of automobile vacuum booster with urgent auxiliary brake function according to claim 1, it is characterized in that: described control mechanism (9) comprises that endoporus and profile are notch cuttype support cylindraceous (101), O type circle (102), metal gasket (103), sleeve spring (104), sleeve (105) and the grooming ring assembly (106) that is formed by conv dish (201), grooming ring spring (202), grooming ring (203) and tie bolt (204);
Support (101) is held greatly cylinder to be contained in described piston body (2) hole and with O type circle (102) and is sealed, and metal gasket (103) is close on the shoulder of support (101) macropore, and described rubber reaction plate (11) is close on the metal gasket (103); Conv dish (201) small end cylinder surface cover has grooming ring spring (202), connect by bolt (204) between conv dish (201) and the grooming ring (203), conv dish (201) holds greatly the face of cylinder to be installed in metal gasket (103) hole, grooming ring (203) is installed in the little stomidium of support (101), support (101) small end cylinder outer cover has sleeve (105), sleeve (105) overcoat has sleeve spring (104), and grooming ring (203) links to each other with ball (107) with sleeve (105); Gapped J between the large stomidium bottom surface of grooming ring (203) and described conv dish (201) the small end end face, the small end of control valve seat (7) are installed in grooming ring (203) hole away from conv dish (201).
3. a kind of automobile vacuum booster with urgent auxiliary brake function according to claim 2, it is characterized in that: connecting with circular arc between the two cylindrical surface in the described grooming ring assembly (106) on the grooming ring (203), is connected with cambered surface and connects with circular arc in the face of cylinder of sleeve (105) inwall.
4. a kind of automobile vacuum booster with urgent auxiliary brake function according to claim 2, it is characterized in that: radial equipartition has N bar ball slideway on described support (101) the small end thin-walled, ball (107) radially slides in described ball slideway, and each ball links to each other with grooming ring (203) with sleeve (105) respectively.
5. a kind of automobile vacuum booster with urgent auxiliary brake function according to claim 2 is characterized in that: be provided with seal ring between described support (101) and described piston body (2) hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 201220380665 CN202716865U (en) | 2012-08-02 | 2012-08-02 | Automobile vacuum power booster with emergency auxiliary braking function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN 201220380665 CN202716865U (en) | 2012-08-02 | 2012-08-02 | Automobile vacuum power booster with emergency auxiliary braking function |
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CN202716865U true CN202716865U (en) | 2013-02-06 |
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CN 201220380665 Expired - Lifetime CN202716865U (en) | 2012-08-02 | 2012-08-02 | Automobile vacuum power booster with emergency auxiliary braking function |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102795218A (en) * | 2012-08-02 | 2012-11-28 | 浙江亚太机电股份有限公司 | Automobile vacuum booster with emergency auxiliary braking function |
-
2012
- 2012-08-02 CN CN 201220380665 patent/CN202716865U/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102795218A (en) * | 2012-08-02 | 2012-11-28 | 浙江亚太机电股份有限公司 | Automobile vacuum booster with emergency auxiliary braking function |
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Legal Events
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CX01 | Expiry of patent term |
Granted publication date: 20130206 |
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CX01 | Expiry of patent term |