CN204136973U - A kind of air pressure strengthener of having brake master cylinder - Google Patents
A kind of air pressure strengthener of having brake master cylinder Download PDFInfo
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- CN204136973U CN204136973U CN201420551045.3U CN201420551045U CN204136973U CN 204136973 U CN204136973 U CN 204136973U CN 201420551045 U CN201420551045 U CN 201420551045U CN 204136973 U CN204136973 U CN 204136973U
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Abstract
The utility model relates to a kind of air pressure strengthener of having brake master cylinder, be connected with master brake cylinder (20) by the front case (35) of air pressure strengthener, substituting in prior art adopts vacuum booster with master cylinder assembly to meet required braking force, and requirement is the vehicle of hydraulic braking, it is by air pressure assisted, can strengthen braking force exponentially, and its relative volume is less than vacuum booster with master cylinder, meets installation requirement better.Input push rod (3) in air pressure strengthener optional position in pushing course stops, and when atmospheric pressure and hydraulic coupling reach balance, air intake valve (C) is closed, thus realizes the servo antrol function of the air pressure strengthener of having brake master cylinder.In addition, freeing pipe (38) is connected with noise reduction check valve outside operator's compartment by flexible pipe, effectively prevents dust granule from entering in the cavity of servo-unit, keeps cavity to clean, reduces the exhaust noise of operator's compartment simultaneously.
Description
Technical field
The utility model relates to for the power-assisted braking arrangement in hydraulic braking system for automobile, in particular to a kind of air pressure strengthener of having brake master cylinder.
Background technology
mostly adopt vacuum booster in the motor vehicle braking system of transmission, but vacuum booster system is for the large light-duty vehicle of tonnage, and its braking force just seems not enough, and its major defect existed is poor stop, and driver's operation intensity is large, dangerous.Therefore, there is employing air pressure strengthener in prior art and replaced original vacuum booster technology.
The air pressure strengthener of having brake master cylinder is the key element in hydraulic vehicle braking mechanism, is loaded on operator's compartment and is directly connected with brake pedal.Its principle is: pressurized air air pressure can be converted into hydraulic energy by air pressure strengthener, is delivered to brake cylinder or brake caliper, realizes the drag of automobile.When pilot control brake pedal, brake master cylinder assembly helps to provide pedal Input Forces, thus alleviates driver pedal actuating force, realizes brake pedal portability, alleviates the working strength of chaufeur.When chaufeur steps on brake pedal, brake master cylinder assembly cylinder piston promotes brake master cylinder piston by push rod and moves axially together, make master brake cylinder two working chamber volumes reduce hydraulic pressure to rise, hydraulic pressure transfers to brake cylinder or brake caliper by the brake pipe be connected with master cylinder, move axially at the epitrochoidal chamber hydraulic drive piston of wheel cylinder or clamp, in drum brake mechanism, brake cylinder piston moves and two brake straps is opened, and with brake wheel friction, produce braking force; In plate disc brake, caliper piston moves and is tightly pressed from both sides on the disc brake rotor by brake plate, makes car retardation by rubbing effect.But adopt air pressure strengthener to replace original vacuum booster in prior art and still there is certain defect.
Such as Authorization Notice No. is the Chinese utility model patent of CN2883109Y, it discloses a kind of air pressure strengthener, be made up of air pressure strengthener body and coupled fore shell, fore shell connects master brake cylinder, in body, be provided with the relay piston and power-assisted chamber that can move up and down, be also provided with intake interface, induction opening, inlet chamber, air gate and exhausr port.Rubber seal rings for seal is respectively equipped with in relay piston, relay piston has relay piston pull back spring, the valve that can move up and down also is provided with in relay piston, valve return spring is provided with outside valve, valve is placed in valve block seat, valve block seat has back-up ring, and valve block seat is connected with the master cylinder push rod of master brake cylinder by screw thread, makes master cylinder push rod energy up-down adjustment.Also be provided with the piston follower that can move up and down on the top of relay piston, be provided with piston return spring outside piston follower, be also provided with outlet chamber, piston follower is provided with back-up ring, and piston follower is promoted by push rod, in the middle of valve and valve block seat, have deflation hole.Be applicable to light-duty vehicle, minibus, farm vehicle etc.Deflation hole in this air pressure strengthener is directly exposed in air, and during work, dust, moisture etc. can enter in cylinder, and during exhaust, noise is large, shortens the service life of product.
Summary of the invention
In order to solve the above-mentioned technological deficiency that prior art exists, the purpose of this utility model is the air pressure strengthener providing a kind of having brake master cylinder, by air pressure strengthener and master brake cylinder cooperating, substituting some vehicle adopts vacuum booster with master cylinder assembly to meet required braking force, and requirement is the vehicle of hydraulic braking, it is by air pressure assisted, braking force can be strengthened exponentially, and its relative volume is less than vacuum booster with master cylinder, meets installation requirement better.In addition, freeing pipe is connected with noise reduction check valve outside operator's compartment by flexible pipe, effectively prevents dust granule from entering in the cavity of servo-unit, keeps cavity to clean, reduces the exhaust noise of operator's compartment simultaneously.
In order to realize above-mentioned design goal, the scheme that the utility model adopts is as follows:
A kind of air pressure strengthener of having brake master cylinder, comprise master brake cylinder, the front case assembly of air pressure strengthener and the rear housing assembly of air pressure strengthener, described master brake cylinder is connected by the front case of mounting screw with front case assembly, be provided with boosting piston in described servo-unit, boosting piston is connected with piston barrel by screw thread; Front case is provided with freeing pipe, and freeing pipe is connected with noise reduction check valve outside operator's compartment by flexible pipe, effectively prevents dust granule from entering in boost pump cavity, keeps cavity to clean, reduces the exhaust noise of operator's compartment simultaneously.
Preferably, described front case assembly and rear housing assembly are linked together by spline hexagonal bar iron, and pass through gap-forming power-assisted chamber and the chamber of boosting piston.Spline hexagonal bar iron its be the bolt that can prevent from rotating voluntarily.
In above-mentioned either a program preferably, the end of described master brake cylinder is provided with the first chamber.
In above-mentioned either a program preferably, described servo-unit is also provided with push rod fork, input push rod and dust boot.
In above-mentioned either a program preferably, described front case assembly comprises front case, front case brace panel and mounting screw.
In above-mentioned either a program preferably, described rear housing assembly comprises rear housing, outside framework oil seal, the 3rd orienting sleeve, hexagonal bar iron and tightening seal washer.
In above-mentioned either a program preferably, rectangular loop is provided with between described front case and master brake cylinder.
In above-mentioned either a program preferably, the first chamber piston and the second chamber piston is provided with in described master brake cylinder.
In above-mentioned either a program preferably, the first chamber is formed between described first chamber piston and the second chamber piston; The housing of the second piston and master brake cylinder forms the second chamber.
In above-mentioned either a program preferably, described first chamber piston has compensation orifice.
In above-mentioned either a program preferably, seal ring and the second orienting sleeve is provided with between the front case 35 of described boosting piston and front case assembly.
In above-mentioned either a program preferably, described boosting piston is provided with output push rod, exports push rod and is connected with the first chamber piston of master brake cylinder.When chaufeur steps on brake pedal, power-assisted enters pressurized air in chamber, and then promotion boosting piston moves right, and because the output push rod on boosting piston is connected with the first chamber piston, therefore the first chamber piston also can move right along with boosting piston.
In above-mentioned either a program preferably, described output push rod and boosting piston contact site are provided with hexagonal nut.
In above-mentioned either a program preferably, pull back spring is provided with between described boosting piston and front case assembly.
In above-mentioned either a program preferably, the 4th O type circle is provided with between described boosting piston and piston barrel.
In above-mentioned either a program preferably, the contact site of described rear housing and front case is provided with the 3rd O type circle.
In above-mentioned either a program preferably, the first orienting sleeve is provided with in described piston barrel; Center cavity is had in piston barrel.
In above-mentioned either a program preferably, the end of described center cavity is provided with drain tap.
In above-mentioned either a program preferably, back-up ring is provided with between the end of described piston barrel and the end of the first orienting sleeve.
In above-mentioned either a program preferably, exhaust passage is formed between described piston barrel and the first orienting sleeve.
In above-mentioned either a program preferably, valve and inlet valve seat is provided with in described first orienting sleeve.
In above-mentioned either a program preferably, the 6th O type circle and valve spring is provided with between described valve and inlet valve seat.
In above-mentioned either a program preferably, the end of described valve is provided with air intake valve.
In above-mentioned either a program preferably, described inlet valve seat and the first orienting sleeve are threaded connection, and are provided with the 2nd O RunddichtringO in the end of the first orienting sleeve.
In above-mentioned either a program preferably, free air diffuser is formed between described inlet valve seat and the first orienting sleeve.
In above-mentioned either a program preferably, described inlet valve seat is provided with air intake assembly, and this air intake assembly comprises rotating prevention sleeve, hollow bolt and snap ring.
In above-mentioned either a program preferably, an O type circle is provided with between described rotating prevention sleeve and hollow bolt.
In above-mentioned either a program preferably, the inside of described snap ring is provided with special-shaped seal ring.
In above-mentioned either a program preferably, admission port is had in described hollow bolt.
The working process of the air pressure strengthener of having brake master cylinder of the present utility model is: when chaufeur steps on brake pedal, the promotion guide pin bushing of input push rod moves right, overcome the application force of control valve spring, move right certain stroke, close drain tap, air intake valve is backed down, pressurized air passes through admission port, free air diffuser, air intake valve, enter air pressure assisted chamber, pressurized air promote boosting piston move right realize air pressure assisted, under the power and compressed-air actuated combined action of input push rod, boosting piston promotes master brake cylinder two chamber pistons by exporting push rod move right together, cavity volume on the right side of power-assisted chamber reduces, unnecessary gas is discharged by freeing pipe, piston along with master brake cylinder continues to move right, compensation orifice on first chamber piston is closed, oil pressure is set up in first chamber and the second chamber, be delivered to brake caliper or brake cylinder, realize brake snub.In the pushing course of input push rod, optional position stops, and when atmospheric pressure and hydraulic coupling reach balance, air intake valve is closed, thus realizes the servo antrol function of the assembly of air pressure strengthener having brake master cylinder.
When brake off, the reach of input push rod, guide pin bushing, under the effect of control valve spring, cuts out air intake valve, open drain tap, Partial shrinkage air is by exhaust passage and the noise elimination check valve discharge through being connected with freeing pipe, and two chamber pistons of boosting piston and master brake cylinder are moved to the left, with the slowly return inputting push rod under the combined action of hydraulic coupling and pull back spring power, drain tap is opened completely, pressurized air is discharged, boosting piston return, brake release.When optional position in the reach process inputting push rod stops, when atmospheric pressure and hydraulic coupling reach balance, drain tap is closed, thus realizes the servo antrol function in return process.
When air pressure assisted partial failure, the promotion guide pin bushing of input push rod leans on the step of piston barrel, and the piston of promotion boosting piston, master brake cylinder moves together afterwards, and chaufeur manpower can be leaned on to realize braking.
Accompanying drawing explanation
Fig. 1 is the block diagram of a preferred embodiment of air pressure strengthener according to having brake master cylinder of the present utility model.
Fig. 2 is the cutaway view embodiment illustrated in fig. 1 of the air pressure strengthener according to having brake master cylinder of the present utility model.
Fig. 3 is the enlarged drawing at the embodiment illustrated in fig. 2 middle M place of air pressure strengthener according to having brake master cylinder of the present utility model.
Fig. 4 is the front view embodiment illustrated in fig. 1 of the air pressure strengthener according to having brake master cylinder of the present utility model.
Fig. 5 is the front view of rear housing assembly in the Fig. 1 according to the air pressure strengthener of having brake master cylinder of the present utility model.
Fig. 6 is the cutaway view embodiment illustrated in fig. 5 of the air pressure strengthener according to having brake master cylinder of the present utility model.
Fig. 7 is the embodiment illustrated in fig. 5 middle A-A cutaway view of the air pressure strengthener according to having brake master cylinder of the present utility model.
Fig. 8 is the right perspective view embodiment illustrated in fig. 1 of the air pressure strengthener according to having brake master cylinder of the present utility model.
Fig. 9 is the right elevation embodiment illustrated in fig. 1 of the air pressure strengthener according to having brake master cylinder of the present utility model.
Figure 10 is the front view of the embodiment illustrated in fig. 8 middle front case assembly of air pressure strengthener according to having brake master cylinder of the present utility model.
Figure 11 is the side sectional view of the embodiment illustrated in fig. 8 middle front case assembly of air pressure strengthener according to having brake master cylinder of the present utility model.
Constitution diagram when Figure 12 is the air pressure strengthener brake off according to having brake master cylinder of the present utility model.
Figure 13 is the embodiment illustrated in fig. 12 middle N place enlarged drawing of the air pressure strengthener according to having brake master cylinder of the present utility model.
Figure 14 is the air pressure strengthener braking mode figure according to having brake master cylinder of the present utility model.
Figure 15 is according to the schematic diagram in the air pressure strengthener brake off process of having brake master cylinder of the present utility model.
Attached number in the figure:
Push rod fork 1, hexagon thin nut 2, input push rod 3, rotating prevention sleeve 4, hollow bolt 5, one O shape circle 6, snap ring 7, special-shaped seal ring 8, 2nd O shape circle 9, back-up ring 10, piston barrel 11, dust boot 12, first guide pin bushing 13, rear housing assembly 14, 3rd O shape circle 15, seal ring 16, second orienting sleeve 17, boosting piston 18, front case assembly 19, master brake cylinder 20, rectangular loop 21, pull back spring 22, export push rod 23, hexagonal nut 24, 4th O shape circle 25, control valve spring 26, 5th O shape circle 27, valve 28, valve spring 29, 6th O shape circle 30, air inlet seat 31, high strength hexagonal nut 32, spring washer 33, spline hexagonal bar iron 34, front case 35, front case brace panel 36, mounting screw 37, freeing pipe 38, rear housing 39, outside framework oil seal 40, the 3rd orienting sleeve 41, hexagonal bar iron 42, tightening seal washer 43, the first chamber piston 44, compensation orifice 45, admission port A, free air diffuser B, air intake valve C, drain tap D, center cavity E, exhaust passage F, power-assisted chamber G, chamber H, first chamber K, second chamber L.
Detailed description of the invention
The following description is only exemplary and be not to limit the disclosure, application or purposes in essence.Be further described below in conjunction with the detailed description of the invention of Figure of description to the air pressure strengthener of the utility model having brake master cylinder.
As shown in Figure 1-Figure 3, according to the cutaway view of the air pressure strengthener of having brake master cylinder of the present utility model.A kind of air pressure strengthener of having brake master cylinder, comprise master brake cylinder 20, the front case assembly 19 of air pressure strengthener and the rear housing assembly 14 of air pressure strengthener, described master brake cylinder 20 is connected with the front case 35 of front case assembly 19 by mounting screw 37, be provided with boosting piston 18 in described servo-unit, boosting piston 18 is connected with piston barrel 11 by screw thread; Front case 35 is provided with freeing pipe 38, and freeing pipe 38 is connected with noise reduction check valve outside operator's compartment by flexible pipe, effectively prevents dust granule from entering in boost pump cavity, keeps cavity to clean, reduces the exhaust noise of operator's compartment simultaneously; In the present embodiment, described servo-unit is also provided with push rod fork 1, input push rod 3 and dust boot 12, prevents dust from entering in the cavity of servo-unit.In addition, the air pressure strengthener of having brake master cylinder of the present utility model is by air pressure strengthener and master brake cylinder cooperating, substituting some vehicle adopts vacuum booster with master cylinder assembly to meet required braking force, and requirement is the vehicle of hydraulic braking, it is by air pressure assisted, can strengthen braking force exponentially, and its relative volume is less than vacuum booster with master cylinder, meets installation requirement better.
As shown in figure 13, admission port A is provided with in air pressure strengthener of the present utility model, free air diffuser B, air intake valve C, drain tap D, center cavity E, exhaust passage F, power-assisted chamber G, the promotion guide pin bushing 13 of input push rod 3 moves right, overcome the application force of control valve spring 26, move right certain stroke, close drain tap D, air intake valve C is backed down, pressurized air is by admission port A, free air diffuser B, air intake valve C, enter air pressure assisted chamber G, pressurized air promote boosting piston 18 move right realize air pressure assisted, under the power and compressed-air actuated combined action of input push rod 3, boosting piston 18 promotes master brake cylinder 20 two chamber pistons by exporting push rod 23 move right together, chamber H volume reduces, unnecessary gas is discharged by freeing pipe 38, piston along with master brake cylinder 20 continues to move right, compensation orifice 45 on first chamber piston 44 is closed, first chamber K, second chamber L sets up oil pressure, be delivered to brake caliper or brake cylinder, realize brake snub.In the pushing course of input push rod 3, optional position stops, and when atmospheric pressure and hydraulic coupling reach balance, air intake valve C closes, thus realizes the servo antrol function of the assembly of air pressure strengthener having brake master cylinder 20.
Next consult shown in Figure 14,15, according to schematic diagram in the air pressure strengthener braking procedure of having brake master cylinder of the present utility model.The working process of the air pressure strengthener of having brake master cylinder of the present utility model is: when chaufeur steps on brake pedal, the promotion guide pin bushing 13 of input push rod 3 moves right, overcome the application force of control valve spring 26, move right certain stroke, close drain tap D, air intake valve C is backed down, pressurized air is by admission port A, free air diffuser B, air intake valve C, enter air pressure assisted chamber G, pressurized air promote boosting piston 18 move right realize air pressure assisted, under the power and compressed-air actuated combined action of input push rod 3, boosting piston 18 promotes master brake cylinder 20 two chamber pistons by exporting push rod 23 move right together, chamber H volume reduces, unnecessary gas is discharged by freeing pipe 38, piston along with master brake cylinder 20 continues to move right, compensation orifice 45 on first chamber piston 44 is closed, first chamber K, second chamber L sets up oil pressure, be delivered to brake caliper or brake cylinder, realize brake snub.In the pushing course of input push rod 3, optional position stops, and when atmospheric pressure and hydraulic coupling reach balance, air intake valve C closes, thus realizes the servo antrol function of the assembly of air pressure strengthener having brake master cylinder 20.
When air pressure assisted partial failure, the promotion guide pin bushing 13 of input push rod 3 leans on the step of piston barrel 11, and the piston of promotion boosting piston 18, master brake cylinder 20 moves together afterwards, and chaufeur manpower can be leaned on to realize braking.
Next consult shown in Figure 12, constitution diagram during air pressure strengthener brake off according to having brake master cylinder of the present utility model.When brake off, the reach of input push rod 3, guide pin bushing 13 is under the effect of control valve spring 26, close air intake valve C, open drain tap D, Partial shrinkage air is discharged by exhaust passage F and the noise elimination check valve through being connected with freeing pipe 38, two chamber pistons of boosting piston 18 and master brake cylinder 20 are moved to the left under the combined action of hydraulic coupling and pull back spring 22 power, with the slowly return of input push rod 3, drain tap D opens completely, pressurized air is discharged, boosting piston 18 return, brake release.When optional position in the reach process inputting push rod 3 stops, when atmospheric pressure and hydraulic coupling reach balance, drain tap D closes, thus realizes the servo antrol function in return process.
As shown in figure 12, in the present embodiment, described front case assembly 19 is linked together by spline hexagonal bar iron 34 with rear housing assembly 14, and passes through gap-forming power-assisted chamber G and the chamber H of boosting piston 18; The end of described master brake cylinder 20 is provided with the first chamber K.
When chaufeur steps on brake pedal, the promotion guide pin bushing 13 of input push rod 3 moves right, overcome the application force of control valve spring 26, move right certain stroke, close drain tap D, air intake valve C is backed down, pressurized air is by admission port A, free air diffuser B, air intake valve C, enter air pressure assisted chamber G, pressurized air promote boosting piston 18 move right realize air pressure assisted, under the power and compressed-air actuated combined action of input push rod 3, boosting piston 18 promotes master brake cylinder 20 two chamber pistons by exporting push rod 23 move right together, chamber H volume reduces, unnecessary gas is discharged by freeing pipe 38, piston along with master brake cylinder 20 continues to move right, compensation orifice 45 on first chamber piston 44 is closed, first chamber K, second chamber L sets up oil pressure, be delivered to brake caliper or brake cylinder, realize brake snub.In the pushing course of input push rod 3, optional position stops, and when atmospheric pressure and hydraulic coupling reach balance, air intake valve C closes, thus realizes the servo antrol function of the assembly of air pressure strengthener having brake master cylinder 20.
As illustrated in figs. 8-11, according to the structural representation of the embodiment illustrated in fig. 8 middle front case assembly of the air pressure strengthener of having brake master cylinder of the present utility model.In the present embodiment, described front case assembly 19 comprises front case 35, front case brace panel 36 and mounting screw 37.Front case 35 is blanked part, and dimensional accuracy is ensured by mould, has higher strength and stiffness requirement.When front case brace panel 36 is for preventing front case 35 stressed, distortion is serious; Four mounting screws 37 pass front case brace panel 36 riveting on front case 35, are used for installing master brake cylinder 20; Freeing pipe 38 is welded on front case 35, is used for discharging the excessive gas in cylinder.
In the present embodiment, rectangular loop 21 is provided with between described front case 35 and master brake cylinder 20.
In the present embodiment, the first chamber piston 44 and the second chamber piston 46 is provided with in described master brake cylinder 20.
In the present embodiment, the first chamber K is formed between described first chamber piston 44 and the housing of master brake cylinder 20; Second chamber piston 46 forms the second chamber L with the end of the housing of master brake cylinder 20.
In the present embodiment, described first chamber piston 44 has compensation orifice 45.
In the present embodiment, seal ring 16 and the second orienting sleeve 17 is provided with between described boosting piston 18 and the front case 35 of front case assembly 19.
In the present embodiment, described boosting piston 18 is provided with and exports push rod 23, exports push rod 23 and is connected with the first chamber piston 44 of master brake cylinder 20.When chaufeur steps on brake pedal, pressurized air is entered in the G of power-assisted chamber, and then promotion boosting piston 18 moves right, because the output push rod 23 on boosting piston 18 is connected with the first chamber piston 44, therefore the first chamber piston 44 also can move right along with boosting piston 18.
In the present embodiment, described output push rod 23 is provided with hexagonal nut 24 with boosting piston 18 contact site.
In the present embodiment, pull back spring 22 is provided with between described boosting piston 18 and front shell assemblies 19.
As shown in figs. 4-7, according to the structural representation of front case assembly in the air pressure strengthener of having brake master cylinder of the present utility model.In the present embodiment, described rear housing assembly 14 comprises rear housing 39, outside framework oil seal 40, the 3rd orienting sleeve 41, hexagonal bar iron 42 and tightening seal washer 43.Rear housing assembly 14 is made up of rear housing 39, outside framework oil seal 40, little orienting sleeve 41, hexagonal bar iron 42, tightening seal washer 43 parts.Rear housing 39 be after casting aluminium material die casting through processing, four hexagonal bar irons 42 rear housing 39 are equipped with; Seal with tightening seal washer 43 between rear housing 39 and hexagonal bar iron 42; Hexagonal bar iron 42 is that air pressure strengthener having brake master cylinder 20 is used for being connected and fixed with pedal support; Outside framework oil seal 40 is for the sealing between rear housing 39 and piston barrel 11, and the 3rd orienting sleeve 41 plays directional tagging when piston barrel 11 moves.
In the present embodiment, the 4th O type circle 25 is provided with between described boosting piston 18 and piston barrel 11.
In the present embodiment, described rear housing 39 is provided with the 3rd O type circle 15 with the contact site of front case 35.
In the present embodiment, the first orienting sleeve 13 is provided with in described piston barrel 11; Center cavity E is had in piston barrel 11.
In the present embodiment, the end of described center cavity E is provided with drain tap D.
In the present embodiment, back-up ring 10 is provided with between the end of described piston barrel 11 and the end of the first orienting sleeve 13.
In the present embodiment, exhaust passage F is formed between described piston barrel 11 and the first orienting sleeve 13.
In the present embodiment, valve 28 and inlet valve seat 31 is provided with in described first orienting sleeve 13.
In the present embodiment, the 6th O type circle 30 and valve spring 29 is provided with between described valve 28 and inlet valve seat 31.
In the present embodiment, the end of described valve 28 is provided with air intake valve C.
In the present embodiment, described inlet valve seat 31 and the first orienting sleeve 13 are threaded connection, and are provided with the 2nd O RunddichtringO 9 in the end of the first orienting sleeve 13.
In the present embodiment, free air diffuser B is formed between described inlet valve seat 31 and the first orienting sleeve 13.
In the present embodiment, described inlet valve seat 31 is provided with air intake assembly, and this air intake assembly comprises rotating prevention sleeve 4, hollow bolt 5 and snap ring 7.
In the present embodiment, an O type circle 6 is provided with between described rotating prevention sleeve 4 and hollow bolt 5.
In the present embodiment, the inside of described snap ring 7 is provided with special-shaped seal ring 8.
In the present embodiment, admission port A is had in described hollow bolt 5.
In sum, the air pressure strengthener of having brake master cylinder of the present utility model is by air pressure strengthener and master brake cylinder cooperating, substituting some vehicle adopts vacuum booster with master cylinder assembly to meet required braking force, and requirement is the vehicle of hydraulic braking, it is by air pressure assisted, can strengthen braking force exponentially, and its relative volume is less than vacuum booster with master cylinder, meets installation requirement better.
It will be apparent to those skilled in the art that the air pressure strengthener of having brake master cylinder of the present utility model comprises the combination in any of each several part in this specification sheets.As space is limited and in order to make specification sheets simple and clear, these combinations are not introduced one by one in detail at this, but after having seen this specification sheets, the scope of the present utility model that the combination in any of each several part be made up of this specification sheets is formed is self-evident.
Claims (10)
1. the air pressure strengthener of a having brake master cylinder, comprise master brake cylinder (20), the front case assembly (19) of air pressure strengthener and the rear housing assembly (14) of air pressure strengthener, described master brake cylinder (20) is connected with the front case (35) of front case assembly (19) by mounting screw (37), it is characterized in that: be provided with boosting piston (18) in servo-unit, boosting piston (18) is connected with piston barrel (11) by screw thread; Front case (35) is provided with freeing pipe (38), and freeing pipe (38) is connected with noise reduction check valve outside operator's compartment by flexible pipe.
2. the air pressure strengthener of having brake master cylinder as claimed in claim 1, it is characterized in that: front case assembly (19) and rear housing assembly (14) are linked together by spline hexagonal bar iron (34), and pass through gap-forming power-assisted chamber (G) and the chamber (H) of boosting piston (18).
3. the air pressure strengthener of having brake master cylinder as claimed in claim 1, is characterized in that: the end of master brake cylinder (20) is provided with the first chamber (K).
4. the air pressure strengthener of the having brake master cylinder according to any one of claim 1-3, is characterized in that: servo-unit is also provided with push rod fork (1), input push rod (3) and dust boot (12).
5. the air pressure strengthener of having brake master cylinder as claimed in claim 1 or 2, is characterized in that: front case assembly (19) comprises front case (35), front case brace panel (36) and mounting screw (37).
6. the air pressure strengthener of having brake master cylinder as claimed in claim 1 or 2, is characterized in that: rear housing assembly (14) comprises rear housing (39), outside framework oil seal (40), the 3rd orienting sleeve (41), hexagonal bar iron (42) and tightening seal washer (43).
7. the air pressure strengthener of having brake master cylinder as claimed in claim 5, is characterized in that: be provided with rectangular loop (21) between front case (35) and master brake cylinder (20).
8. the air pressure strengthener of the having brake master cylinder as described in claim 1 or 3, is characterized in that: be provided with the first chamber piston (44) and the second chamber piston (46) in master brake cylinder (20).
9. the air pressure strengthener of having brake master cylinder as claimed in claim 8, is characterized in that: form the first chamber (K) between the first chamber piston (44) and the second chamber piston (46); Second chamber piston (46) forms the second chamber (L) with the housing of master brake cylinder (20).
10. the air pressure strengthener of having brake master cylinder as claimed in claim 8, is characterized in that: the first chamber piston (44) has compensation orifice (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420551045.3U CN204136973U (en) | 2014-09-24 | 2014-09-24 | A kind of air pressure strengthener of having brake master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420551045.3U CN204136973U (en) | 2014-09-24 | 2014-09-24 | A kind of air pressure strengthener of having brake master cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204136973U true CN204136973U (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420551045.3U Expired - Fee Related CN204136973U (en) | 2014-09-24 | 2014-09-24 | A kind of air pressure strengthener of having brake master cylinder |
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| Country | Link |
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| CN (1) | CN204136973U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192109A (en) * | 2014-09-24 | 2014-12-10 | 瑞立集团瑞安汽车零部件有限公司 | Air booster with brake master cylinder |
-
2014
- 2014-09-24 CN CN201420551045.3U patent/CN204136973U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192109A (en) * | 2014-09-24 | 2014-12-10 | 瑞立集团瑞安汽车零部件有限公司 | Air booster with brake master cylinder |
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Granted publication date: 20150204 Termination date: 20170924 |