CN202098406U

CN202098406U - Main brake valve for automobile

Info

Publication number: CN202098406U
Application number: CN2011200851763U
Authority: CN
Inventors: 叶仕清
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-17
Filing date: 2011-03-17
Publication date: 2012-01-04
Anticipated expiration: 2021-03-17

Abstract

A main brake valve for an automobile comprises a shell, a brake piston, a rear wheel brake air inlet valve, a piston upper cover, a pedal ejector rod, and a sealing part, a return spring and a driven wheel of the shell, the brake piston and the rear wheel brake air inlet valve. The brake piston is mounted in the shell, and the pedal ejector rod is movably connected with the piston upper cover in a sleeved manner. The main brake valve for the automobile is characterized in that a piston lining is mounted in an upper cavity of the shell, the length of the piston lining is larger than the depth of an inner cavity of the shell, the piston is mounted in the piston lining, the length of the piston matches with that of the lining, a large balance spring is mounted in an inner cavity of the piston and provided with a rubber rod matching with the inner cavity, a small balance spring is mounted in an air guide cavity of the lower section of the piston, elasticity of the small balance spring is 25%-40% higher than that of the large balance spring in the inner cavity of the piston, and the small spring is also provided with a rubber bar matching with the inner cavity. The main brake valve for the automobile is favorable for improving brake performance and operation requirements of a heavy-duty truck, and guarantees brake safety of the heavy-duty truck under different road conditions and different speed conditions.

Description

The automobile brake main valve

Technical field

The utility model belongs to a kind of improvement technology to existing HD truck brake activation valve.Be particularly useful for improving a technology of model automobile brake main valves such as EQ153, liberation 151, EQ140.

Background technology

The automobile brake main valve is the important mechanism of vehicle safety travel; Glancing impact; Main valve is transported to the distribution of each brake repair room air pressure size front and back wheel braking dynamics and the sequencing of braking, and can all be related to automobile in time brake on request, in the equilibrium problem that receives the glancing impact vehicle body.The autotruck main valve of existing EQ153, liberation 151, EQ140 model adopts elastomeric material to make equalizing feature, and the transmission of braking force is slow, and the air inlet of front and back wheel brake repair room simultaneously; Simultaneously stressed before and after making in the braking procedure, thus too fast in the speed of a motor vehicle, descending or slippery when wet; Brake request just is far from suitable; The braking force Low Response, the vehicle body teeter is outstanding, is prone to cause traffic accident.

In the ZL2004201045425 patented technology, piston cavity uses two pieces of springs of size to make the air inlet balancing device.Glancing impact, air inlet is smooth-going, braking force is quick on the draw.In the braking, be first trailing wheel simultaneously, the order of front-wheel is protected again.

Main valve uses two pieces of springs that vary in size to make the air inlet balancing device, and new spring in use still can satisfy brake request, yet; Along with the increase of access times, under the effect of power, it is tired to be prone to make spring to occur; Lost elasticity, worked as glancing impact, it is not good enough balance to occur; The main valve deceleration and stopping performance descends, and safety traffic can not get ensureing.

Summary of the invention

The technical matters that the utility model will solve is the deficiency, particularly spring fatiguability to above-mentioned patent prior art; Lose elastomeric problem; Provide a kind of and need not change under the prerequisite that has braking main valve basic structure now, just can realize the spring indefatigability, balance is good; Braking is sensitive, the automobile brake main valve that air inlet is smooth-going.

Concrete scheme is following:

A kind of automobile brake main valve, by housing and the brake piston in the housing inner chamber, installed, trailing wheel braking air inlet valve, front wheel brake air inlet valve, and their sealing member and pull back spring and flower wheel, the pedal push rod formation of piston loam cake and pivot bush unit.Key is: the piston bush of a length greater than the housing inner chamber degree of depth is installed in the housing epicoele, the piston that adapts with liner sleeve length is installed in piston bush, the balance big spring is installed in the piston cavity.And the balance big spring increases the rubber bar that adapts with its inner chamber is housed, and it is the balance little spring of balance big spring elastic force 25-40% in the piston cavity that elastic force is installed in the air guide chamber of piston hypomere, and little spring increases the rubber bar that adapts with its inner chamber is housed.

In the inner chamber of large and small balance spring, the rubber bar that adapts with inner chamber has been installed, the power of 40-50% is assigned in the rubber bar, thereby compression of spring slow down, prolong the service life of spring, created condition for transmitting braking force preferably.

Be manufactured with upper and lower twice annular seal groove at the piston bush outer wall, rubber seal is installed in the groove, a circle lining jump ring groove is equipped with jump ring in the groove on lining inner chamber top makes.Be used to guarantee sealing between lining and inner walls and the requirement that piston is installed.

On piston outer wall, be manufactured with upper and lower two seals groove, rubber seal is installed in the groove, be used to guarantee the sealing requirements between piston and lining inwall.

The rubber sheet gasket of thickness 3mm is installed between flower wheel and front-wheel air inlet valve, is used to make trailing wheel to brake opening of air intake valve prior to the front wheel brake air intake valve.After guaranteeing that the trailing wheel braking takes place, front-wheel is just braked.Glancing impact is in the not teeter of any road conditions under body, the brake activation valve housing inner chamber circle shell snap ring groove that is manufactured with suitable for reading, and interior installation jump ring is used for limiting the position of lining at the housing inner chamber.The hypomere of piston loam cake stretches in the balance big spring inner chamber, and the middle part cover plate contacts with the spring upper surface is movable.

Promptly can be made into one according to such scheme and make automobile brake smooth-going, and braking force is quick on the draw, simultaneously the first trailing wheel automobile brake main valve that is protected of the order of front-wheel again in the braking.

The utility model has the advantages that: adopt present technique autotruck to be carried out the improvement of brake valve of car by the scheme of ZL2004201045425 patented technology.Need not change existing brake activation valve hull shape of maker and size, just can make the piston lengthening, the piston cavity lengthening adapts to the balance big spring is installed, and spring intracavity is equipped with rubber bar as equalization brake gear.The controlled range of braking suction quantity is increased, therefore, the range of control of automobile brake is also increased.Driver behavior can be waited environment according to road conditions, the gradient, vapour, and the speed of a motor vehicle and load-carrying are made and be fit to actual braking selection, and promptly the strength range of choice of pedal brake pedal is big, and flexible operation is easy.The balance little spring of installing between the balance big spring that in the piston cavity lower guide air cavity and top has in addition, inner chamber also is equipped with the rubber bar that adapts, glancing impact, the fast response of balance little spring; Produce braking force, adapt to unloaded and level road use, when on the abrupt slope or ways face, heavy duty; When the speed of a motor vehicle was fast again, brake pedal was afterburning, and the balance little spring is effect earlier; Slow down the speed of a motor vehicle,, just can make the automobile balance braking with the effect of back balance big spring.Pad effect between flower wheel and front-wheel air inlet valve has in addition guaranteed that fully trailing wheel is braked prior to front-wheel.No matter so under what road conditions condition, braking all is pulsation-frees, travel safety is improved.In addition, braking valve housing original structure need not change, and does not just influence the change of original production technology and equipment, the ordinary production of yet favourable brake activation valve production firm.Simultaneously, interests are more arranged to the improvement of vehicles in use brake activation valve.

Description of drawings

Fig. 1 is the total valve arrangement cutaway view of automobile brake;

Fig. 2 is balance big spring, balance little spring mounting means and the structural representation in piston cavity.

Label title among the figure: 1 housing bottom; 2 front-wheel air inlet valve pull back springs; 3 front-wheel air inlet valves; 4 flower wheels; 5 flower wheel Circular Plate; 6 trailing wheel air inlet valve pull back springs; 7 trailing wheel air inlet valves; 8 pistons top; 9 housings; 10 piston return springs; 11 piston packing grooves; 12 balance big springs; Rubber bar in the 13 big spring inner chambers; Back seal groove on the 14 lining outer walls; 15 loam cake cover plates; 16, lining jump ring groove; 17 balance big spring loam cakes; 18 push rods; 19 brake pedals; 20 loam cake tops are used for the cavity that cooperates with push rod; 21 piston jump ring grooves; 22, shell snap ring groove; 23 pistons; 24 linings; 25 balance little springs lid; 26 balance little springs; Rubber bar in the 27 balance little spring inner chambers; 28 cavity of resorptions; 29 rubber sheet gaskets; 30 seal rings.

The specific embodiment

Below in conjunction with accompanying drawing,, scheme is specified as an embodiment.

With reference to Fig. 1, Fig. 2 brake valve of car is mainly by housing 9 and the piston 23 in the housing inner chamber, installed, promotes the trailing wheel air inlet valve 7 that carries out work through piston, and front-wheel air inlet valve 3 and the flower wheel of between the front and back wheel air inlet valve, installing 4 constitute.The utility model is in view of the weak point of prior art; Mainly solved the structure of balance big spring and for the piston bush 24 that the balance big spring is made is installed; Balance big spring loam cake 17 and push rod 18 made the structure that cooperates, at the pad 29 of flower wheel 4 and 3 installations of front-wheel air inlet valve etc.

With reference to Fig. 1, the housing inner chamber divides two parts up and down.Front and rear wheel air inlet valve 3,7 is installed in the cavity of resorption 28, the loam cake 17 of brake piston 23 and promotion pistons work is installed, push rod 18, associated seal etc. in the epicoele.Piston power comes from brake pedal 19, and promote piston return spring loam cake 17 by push rod 18 again and realize balance big spring 12, rubber bar 13 and balance little spring 26, rubber bar 27 reinforcings, and then promote 7 work of trailing wheel air inlet valve, promote 3 work of front-wheel air inlet valve again.The housing inner chamber shell snap ring groove 22 that has suitable for reading, in install and fix the jump ring of lining 24 positions.

With reference to Fig. 1,2, in order to realize the requirement of balance big spring 12 lengthenings, a tubular shape piston bush 24 has been installed in the housing inner chamber, liner sleeve length exceeds housing upper surface 13mm.Piston return spring 10 is installed in lining inner chamber bottom, and balance big spring 12 lower surfaces are by housing epicoele bottom support, and the piston lower part just is inserted in its pull back spring 10 inner chambers.The piston hypomere is top 8, contacts with trailing wheel air inlet valve 7 upper surfaces, transmits piston action.Piston 23 has an inner chamber, and balance big spring 12 and loam cake 17 thereof are installed.The cylinder that is arranged in center, loam cake cover plate 15 lower surface inserts the inner chamber of balance big spring 12, and cover plate 15 is pushed down spring.Loam cake 15 upper surface central authorities have a cavity 20, in hold the push rod 18 that is rotationally connected with brake pedal 19, to transmit braking maneuver from brake pedal.In addition, in the housing inner chamber, keep sealing effectiveness,, have twice ring-type seal groove 14, rubber seal all is installed in it, through housing inner chamber jump ring groove 22 suitable for reading lining 24 is fixed in the housing with jump ring in the top and the bottom of lining outer wall for making lining 24.Piston outer wall also has the circular seal groove 11 of twice up and down, and interior installation rubber seal 30 guarantees the sealing requirements between piston and lining inwall.Lining inner chamber upper oral part has lining jump ring groove 16, with jump ring piston 23 is installed in the lining inner chamber.The piston cavity piston jump ring groove 21 that has suitable for reading is pushed down balance big spring 12 through the cover plate 15 at loam cake middle part, thereby to the speed-slackening signal of piston 23 transmission from pedal.

With reference to Fig. 1, trailing wheel and front wheel brake air valve are installed in housing inner chamber bottom, and the upper surface of trailing wheel air inlet valve 7 and piston top 8 contact, between it and the front-wheel air inlet valve 3, flower wheel 4 have been installed, and are to make front wheel brake be later than one of technical pattern that trailing wheel brakes.The Circular Plate 5 at flower wheel middle part is promptly as the bearing of trailing wheel air inlet valve pull back spring 6.The thick rubber sheet gasket of 3mm 29 is installed between flower wheel 4 lower surfaces and the front-wheel air inlet valve 3, is used to prolong the front-wheel air intake valve and lags behind the time gap that the trailing wheel air intake valve is opened.Further guarantee the requirement of trailing wheel braking prior to front wheel brake.The pull back spring 2 of front-wheel air intake valve is installed in housing bottom 1.

With reference to Fig. 2,1; For adapt in braking procedure braking force by light to heavy mild requirement; When satisfying automobile zero load or flat road surface; Braking force does not need too big actual conditions, and the utility model is also installed the relatively little balance little spring 26 of a dish elastic force in piston air guide chamber, the rubber bar 27 that adapts with the little spring inner chamber.The gland of balance little spring 26 and the below that is contained in balance big spring 12 cover balance little spring and rubber bar upper end.

Promptly can be made into the disclosed automobile brake main valve of the utility model in a manner described; There are interests to improve the deceleration and stopping performance and the operation requirements of autotruck; Ensure the brake safe of autotruck under different road conditions and velocity conditions; Avoid the teeter and the braking force reaction of glancing impact vehicle body insensitive, the problem that the range of control of braking force weight is little.

Claims

1. automobile brake main valve; By housing and the brake piston in the housing inner chamber, installed; Trailing wheel braking air inlet valve, front wheel brake air inlet valve and their sealing member and pull back spring and flower wheel, piston loam cake reach with it, and the pedal push rod of pivot bush unit constitutes; It is characterized in that in the housing epicoele, being equipped with the piston bush (24) of a length greater than the housing inner chamber degree of depth; The piston (23) that adapts with liner sleeve length is installed in piston bush, balance big spring (12), the rubber bar that big spring setting and inner chamber adapt (13) are installed in the piston cavity; It is the balance little spring (26) of balance big spring elastic force 25-40% in the piston cavity that elastic force is installed in the air guide chamber of piston hypomere, the rubber bar that little spring setting and inner chamber adapt (27).

2. a kind of automobile brake main valve according to claim 1; It is characterized in that piston bush (24) outer wall is manufactured with twice annular seal groove (14) up and down; Rubber seal (30) is installed in the groove, is manufactured with a circle lining jump ring groove (16) on lining inner chamber top, jump ring is installed in the groove.

3. a kind of automobile brake main valve according to claim 1 is characterized in that being manufactured with on the piston outer wall two seals groove up and down, and rubber seal (30) is installed in the groove.

4. a kind of automobile brake main valve according to claim 1 is characterized in that so that the rubber sheet gasket (29) of thickness 3mm to be installed between flower wheel (4) and the front-wheel air inlet valve (3).