CN2535266Y - Automobile clutch booster - Google Patents

Abstract

The utility model relates to an automobile clutch booster. The utility model comprises a push rod fork assembly, a dustproof cover, a cylinder, a piston assembly, a shell, vent screw nails, a control piston assembly, a valve assembly, an end socket assembly, an elastic collar, a blanking adapter and a baffle plate, etc. A method that components of a control cavity are installed from the front end of the shell guarantees that the product of the utility model can not cause the phenomena of oil and air leakage; the front end of the cylinder and the side of the vent-hole of the shell are respectively connected with a conduit pipe used for the air suction and the air discharge of the front cavity of the cylinder, a method that a one-way valve is arranged in a ventilation plug assembly guarantees the stopping property and the internal cleanness of the product, and a method that a wear ring is sheathed on the piston protects cylinder holes of the shell not to be damaged; thus, the service life of a sealing ring is effectively extended, and the stability, the reliability and the service life of the product are respectively enhanced and extended. The utility model has the advantages of compact structure, convenient disassembly and assembly, favorable sealing property, stable and reliable performance and long service life, and is applicable to various kinds of heavy-duty motorcars, engineering vehicles and passenger buses.

Description

Automobile clutch booster

One, technical field

The utility model relates to the automobile clutch servo device, is specifically related to a kind of novel cylinder forward type automobile clutch booster.

Two, background technology

In the prior art, the most structure design of cylinder forward type autoclutch is unreasonable, and used parts accuracy of manufacture is had relatively high expectations, and product dismounting difficulty, so unstable properties during batch manufacturing exist leakage of oil, gas leak phenomenon, influences defectives such as product service life.Be in particular in: add circlip with plug after 1, the control part parts are packed into by the housing afterbody and fix, because the vibration in the prolonged and repeated impact of control plunger and the work, cause the loosening of circlip easily and come off, and leakage of oil occurs and product function lost efficacy; 2, in the motion sealing, adopt the O RunddichtringO to carry out vapor seal, thereby the life-span is shorter; 3, the air of cylinder ante-chamber by the aperture on the dust boot inhale, exhaust, because this product is installed on the car chassis, its work under bad environment, when the cylinder ante-chamber is air-breathing, dust, sewage are sucked cylinder in the lump, can cause the corrosion of cylinder and the infantile failure of seal ring like this, thereby cause that product function lost efficacy.Chinese patent 99252062 disclosed " automobile clutch booster " has carried out certain improvement to prior art, but still has above-mentioned 1,2 point defects.

Three, summary of the invention

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of rational in infrastructure, solution leakage of oil, gas leakage and assurance product in-to-in cleanliness level are provided, and prolongs the product new automobile clutch booster in service life.

Realize above-mentioned purpose, the utility model adopts following improvement technical scheme.

The new automobile clutch booster comprises push rod fork assembly, dust boot, flange, cylinder, pull back spring, piston assembly, housing, air bleed screw, control plunger assembly, control plunger pull back spring, valve seat, valve assembly, valve pull back spring, termination assembly, circlip, plug, baffle plate etc., it is characterized in that dust boot is the totally-enclosed structure; Control chamber adopts hierarchic structure, back-end closure, and front end is provided with installation opening; Flange and cylinder front end are established the fluting packing seal, and the air extractor vent offered over against the cylinder front end of the notch of packing seal, are provided with suction, exhaust guide between cylinder ante-chamber air extractor vent and the housing exhaust side air extractor vent.Establish dicyclo square RunddichtringO between cylinder and the housing.In the breather stem vent plug assembly on the housing on the exhausr port check valve is set.Equal suit plastic wear-resisting ring is protected seal ring on control plunger and cylinder, the oil cylinder piston.

Beneficial effect: the utility model has adopted the totally-enclosed design plan, avoids outside dust and sewage to enter product inside, can improve product life; Control chamber takes step-wise manner and inner components to fix with circlip from housing is front loaded, be connected with screw with cylinder bottom after installing plug and backing plate again additional, the product easy accessibility also can guarantee that product leakage of oil, gas leak phenomenon can not occur, has improved reliability of products effectively; Adopted the dicyclo square RunddichtringO mode to seal between cylinder and the housing, solved the control chamber parts from housing the sealing difficult problem between cylinder and housing when front loaded.

The utility model adopts the mode of suit flow ring on piston simultaneously; make between its piston body and the housing cylinder hole and do not produce direct contact; thereby protected housing cylinder hole precision effectively, obviously prolonged the service life of seal ring, improved the reliability of product.

The utility model is described in further detail below in conjunction with accompanying drawing and concrete embodiment.

Four, drawing explanation

Fig. 1 is the utility model structure assembly drowing.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is the scheme drawing of the dicyclo square RunddichtringO between cylinder and the housing.

Fig. 4 is the amplification assumption diagram of breather stem vent plug assembly.

Fig. 5 is the existing structure assembly drowing.

Five, the specific embodiment

Referring to Fig. 1, the utility model mainly comprises push rod fork assembly 1, dust boot 2, flange 3, cylinder 5, pull back spring 6, piston assembly 7, housing 9, air bleed screw 10, control plunger 11, control plunger pull back spring 12, valve seat 13, valve assembly 14, valve pull back spring 15, spacer 16, termination assembly 17, circlip 18, plug 19, baffle plate 20 etc., and dust boot 2 is the totally-enclosed structure; Control chamber 37 adopts hierarchic structure, back-end closure, front end is provided with installation opening, and inner components is front loaded fixing with circlip 18 by housing, install plug 19 again additional and be connected with screw with cylinder 5 bottoms with baffle plate 20 backs, adopt dicyclo square RunddichtringO 8 to seal (see figure 3) between cylinder 5 and the housing 9 and can guarantee its leak free reliability, this kind fit is convenient to the dismounting of parts, and can guarantee that product leakage of oil, gas leak phenomenon can not occur, has improved reliability of products.Adopt the packing seal 4 of fluting to seal between flange 3 and the cylinder 5, (in conjunction with Fig. 2) wherein slotted section is connected suction, the exhaust that a conduit 21 is used for the cylinder ante-chamber simultaneously over against the air extractor vent 35 of cylinder 5 front ends between cylinder 5 and housing 9 exhausr ports.Conduit 21 two ends are stretched into respectively on cylinder 5 front end air extractor vents 35 and the housing and are connected and sealed with rubber ring in the exhausr port 33 side air extractor vents.In the breather stem vent plug assembly 22 on the housing 9 on the exhausr port 33 check valve is set, check valve is formed (see figure 4) by valve 42 and pull back spring 43, the breather stem vent plug assembly adopts the mode of built-in check valve, can guarantee that product inside when not working is in complete fully enclosed state, guarantee product in-to-in cleanliness level effectively, improved the life-span of product.Be set with plastic wear-resisting ring 28,22 and 24 on control plunger 11 and cylinder piston 36, the oil cylinder piston 38; seal ring is protected; allow not direct contact of piston body and cylinder hole; just can not damage the cylinder hole surface when piston moves like this in the cylinder hole; but thereby reach both simplified structures; can prevent that again seal ring is subjected to the damage of metal powder and cylinder hole cut when moving in the cylinder hole, can obviously prolong the service life of seal ring.It is good that the plastic wear-resisting ring is that polytetrafluoroethylmaterial material is made for.Two oppositely directed y-type seal rings 27,25 of lip are set respectively on control plunger 11 and oil cylinder piston 38 carry out oil, vapor seal, the inside y-type seal ring of a lip 29 is set on the termination assembly 17, a y-type seal ring 23 is set on the cylinder piston 36 carries out vapor seal.

Its principle of work is as follows, sees Fig. 1,2,4, and control presssure oil enters in the housing 9 cylinder holes by housing uropore 39, and one the tunnel arrives the oil cylinder piston bottom, promotes piston assembly and travels forward, and the y-type seal ring of oil cylinder piston tail end stops control presssure oil to flow to cylinder.The aperture 26 of another route control chamber wall arrives the control plungers bottom, promote it and travel forward and open valve 14, the y-type seal ring of control plunger tail end stop control presssure oil by piston flow to induction opening 40.Behind the valve open, pressurized air flows through gap between valve 14 and the valve seat 13 by admission port 34 through the cross-drilled hole on the spacers, again by the 40 arrival cylinder back cavities of the induction opening on the housing, promotes piston assembly once more and travels forward and reach the power-assisted purpose of gas.The air of cylinder ante-chamber leads to atmosphere after washing valve 42 open during through breather stem vent plug assembly 22 after by the exhausr port 33 that the air discharge duct on the flangeseal pad 4 and cylinder ante-chamber are inhaled, exhaust guide 21 arrive housings 9, and reaches the purpose of exhaust.The y-type seal ring 27 of control plunger front end stops pressurized air to flow in the control presssure oil by control plunger 11, y-type seal ring 29 on the termination assembly 17 stops pressurized air to flow into exhausr port 33, and the y-type seal ring 23 on the cylinder piston 36 stops pressurized air to flow to the cylinder ante-chamber.After exhaust finished, valve 42 was closed under the effect of pull back spring 43, and product inside is in complete air-tight state.After control-oil pressure disappears, control plunger 11 returns the bottom under the effect of control plunger pull back spring 12, valve 14 is closed under the effect of valve pull back spring 15, stop pressurized air to lead to induction opening 40, piston assembly 7 is simultaneously returned cylinder bottom under the effect of pull back spring 6, the pressurized air of its cylinder back cavity is through the induction opening 40 on the housing 9, enter plug 19 endoporus by the endoporus on the valve assembly 14, communicate with exhausr port 33 on the housing by the cross-drilled hole on the plug 19 again, valve 42 backs of washing open at last on the breather stem vent plug assembly communicate with atmosphere, and reach the purpose of exhaust.Pressurized air in exhausr port arrives the cylinder ante-chambers by the suction of cylinder ante-chamber, the exhaust guide 21 of exhaust side simultaneously, reach purpose to the tonifying Qi of cylinder ante-chamber, after exhaust finished, valve 42 was closed under the effect of pull back spring 43, and product inside is in complete air-tight state.

Fig. 5 is a prior art structure assembly drowing, and the original structure control part is made up of circlip 51, plug 52, control plunger assembly 53, control plunger cylinder assembly 54, control plunger pull back spring 55, valve seat 56, valve assembly 57, valve pull back spring 58, distribution termination 59 by the time.The suction of cylinder ante-chamber, exhaust are finished by the aperture on the front end dust boot 50, outside dust, sewage can be sucked cylinder when air-breathing, thereby cause the premature wear of cylinder corrosion and seal ring, cause product function to lose efficacy; The control chamber parts are fixed with circlip from installing plug additional after the housing afterbody is packed into, like this in the repeated stock and vibration processes of control plunger, circlip is easy to generate loosening or comes off, thereby leakage of oil and product function take place to lose efficacy, simultaneously owing to after having external diameters designs such as inside groove and control chamber zero, parts employing on the housing control chamber inwall, cause product dismounting difficulty, not easy care.Compare with the utility model and obviously to have defectives such as unreasonable structure, poor reliability, life-span be short.

Claims (3)

1, automobile clutch booster, comprise push rod fork assembly 1, dust boot 2, flange 3, cylinder 5, pull back spring 6, piston assembly 7, housing 9, air bleed screw 10, control plunger 11, control plunger pull back spring 12, valve seat 13, valve assembly 14, valve pull back spring 15, spacer 16, termination assembly 17, circlip 18, plug 19, baffle plate 20 etc., it is characterized in that dust boot is the totally-enclosed structure; Control chamber adopts hierarchic structure, back-end closure, and front end is provided with installation opening; Flange 3 adopts fluting packing seal 4 to seal with the cylinder front end, and the air extractor vent 35 offered over against the cylinder front end of the notch of packing seal 4, is connected a conduit 21 between air extractor vent 35 and the housing exhausr port 33 side air extractor vents, establishes breather stem vent plug 22 on the housing exhausr port 33; Establish dicyclo rectangle shape ring 8 between cylinder 5 and the housing 9.

2, automobile clutch booster according to claim 1 is characterized in that breather stem vent plug 22 built-in check valves.

3, automobile clutch booster according to claim 1 is characterized in that on each piston that all suit plastic wear-resisting ring is to seal ring.

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