CN2185707Y

CN2185707Y - Wheel brake control valve for hydraulic system vehicle

Info

Publication number: CN2185707Y
Application number: CN 94208072
Authority: CN
Inventors: 崔树荣
Original assignee: Lanzhou Agile Abs System Engineering Co Ltd
Current assignee: Lanzhou Agile Abs System Engineering Co Ltd
Priority date: 1994-04-04
Filing date: 1994-04-04
Publication date: 1994-12-21
Anticipated expiration: 2004-04-04

Abstract

The utility model provides a wheel brake control valve for hydraulic system for vehicles, comprising an upper valve body, a metering expansion body, a lower valve body, an expansion spacing body, etc. The metering expansion body and the expansion spacing body are installed in the lower valve body. The inner cavity wall of the lower valve body is three different cambered surfaces. Each set of the device is added between a brake master cylinder and front and rear brake cylinders according to the principle that the hydraulic force is average. When the vehicle braking, the oil liquor is uniformly allocated to the wheel to brake according to factors of braking, and as a result the locking phenomenon is avoided when braking. The wheel brake control valve for hydraulic system can shorten the braking distance, and the wheel brake control valve for hydraulic system has easy installation, powerful working, simple structure and safety.

Description

Wheel brake control valve for hydraulic system vehicle

The design belongs to Vehicular brake device, particularly a kind of device that is used for the hydraulic efficiency pressure system car brakeing.

Vehicle, particularly automobile be the important tool of communications and transportation, and traffic safety are the primary major issues of vehicular transport.Automobile brake and vehicular transport safety have close causal relationship, so for solving existing many technical schemes of automobile brake settled the present of problem.Car brake is a friction gear, from machinery and operating principle, it plays an important role, owing to exist thermal deformation and other all multifactor at glancing impact, make wheel hub, friction video disc produce slight crooked and mistake circle, on the metal surface, produce a lot of rough spots, form the locking point.Vehicular brake device has compression air brake, hydraulic efficiency pressure system braking etc.The hydraulic efficiency pressure system vehicle is being carried out braking, and when the position of brake strap and brake shoe and wheel hub and friction video disc epirelief formed friction, in the hydraulic braking pipeline, brake fluid pressure rose rapidly; When carrying out braking, when the position of caving on brake strap and brake shoe and wheel hub and the friction video disc formed friction, brake fluid pressure descended rapidly again.

When car brakeing such as brake strap and the brake shoe position that correspondingly rubs and protrude, or because glancing impact, when brake strap and brake shoe can not be subjected to rubbing simultaneously equably, the hydraulic brake system internal pressure increases suddenly, causes producing between brake strap and wheel hub and friction video disc and slipper the consumption that friction extremely forms thermal deformation and friction braking parts.Friction point in the protuberance position is exactly the locking point, because braking liquid can not in time be compressed at this moment nor can be refluxed by brake piping, produce very high pressure at protuberance position friction point, this just causes wheel " locking ", make vehicle lose control, as front-wheel or the individual wheel lockup in addition of trailing wheel, defective steering stabilizer then takes place, very easily cause car accident.

The problem of brake equipment and wheel lockup causes that people greatly pay attention to, and between more than 100 year since the automobile invention many solutions has been arranged.Some different solutions are also arranged in the hydraulic efficiency pressure system brake equipment.The slide-valve formula anti-lock device that for example German Mercedes car company adopts; Chinese patent application number is the adaptive controller that 91108206.9 design has adopted pressure regulating valve inertia guiding valve and control cock to form; China Patent No. is that 93230364.1 design-calculated hydraulic pressure increase anti-lock device is that hydraulic ram is touched valve, control cock control brake pump and secondary braking respectively by oil pipe, commentaries on classics.Above-mentioned anti-lock device has their own characteristics each, but still a kind of simple installation, the strong and safe and reliable anti-lock device of braking can not be provided.

The design's purpose provides a kind of simple installation and does not change primary car structure, shortens stopping distance, and braking effect is remarkable and strong, the hydraulic efficiency pressure system car brakeing anti-lock device that cost is low.

The principle that the design mainly divides equally with fluid power solves the anti-lock problem of hydraulic efficiency pressure system brake equipment.

Realize that the technical solution of the utility model is in the valve body 6 metering expander 5 and the expansion limit body of being made by oil proof rubber 7 to be housed down, the internal chamber wall of following valve body 6 is by three different cambered surfaces, the macropore that connects Luo bar 3 is installed in the middle of upper valve body 2 is pressed the certain size off-center, on upper valve body 2, adorn an exhaust Luo silk 1, connect Luo bolt 3 and be provided with four RUBBER O RunddichtringOs 4, there is an oily porthole 9 at the center that connects Luo bolt 3, and the other end that connects Luo bolt 3 is fastening with six side Luo bolts 8.

The utility model is to be installed at car brakeing master cylinder and front wheel brake wheel cylinder and trailing wheel brake cylinder junction, respectively adorns 1 cover.

Accompanying drawing is a structural representation of the present utility model.

Elaborate with regard to the utility model and principle of work thereof below in conjunction with accompanying drawing.

Exhaust Luo silk 1 can be discharged the air in the brake system, be mounted on the upper valve body 2, upper valve body 2 is loam cakes of device, connect Luo bolt 3 and anti-embracing unit can be connected threeway one side that installs additional on the master brake cylinder, connect Luo bolt 3 and be provided with four O type rubber seal 4, O type rubber seal 4 can make it no leak with the sealing of device joint with connecting Luo bolt 3, have one to be thorn shape oil pocket in the metering expander 5, metering expander 5 is installed in down in the chamber of valve body 6, should earlier expansion limit body 7 be packed into during installation to descend in the cambered surface annular groove of valve body 6, to measure expander 5 again and be pressed into down in the valve body 6, then upper valve body 2 be connected closely with following valve body 6.Oil porthole 9 is that the oil of master brake cylinder is imported and exported, and expansion limit body 7 is to limit it and fix its position when the coefficient of expansion of metering expander 5 surpasses certain pressure, also plays certain rebound effect simultaneously.

Metering expander 5 and expansion limit body 7 are critical components of realizing that fluid power is divided equally in the utility model.Before the fluid of master brake cylinder enters through the former threeway connector that is equipped with, rear braking subpump carries out glancing impact, respectively install a three-way connector additional at master brake cylinder and front-wheel wheel cylinder and trailing wheel wheel cylinder junction, and respectively adorn one and overlap anti-lock device, before the oil pressure of master brake cylinder enters, also enter the metering expander 5 in the anti-lock device in the time of rear braking subpump, because metering expander 5 is made by oil proof rubber, can corresponding variation also take place according to its coefficient of expansion of the difference that enters oil liquid pressure, because of at glancing impact because the road surface, the speed of a motor vehicle, vehicle load, brake strap, the influence of different factors such as slipper even tire size, the convex-concave friction point that the thermal change that glancing impact produces forms is also made differential responses.Oil pressure increases in the brake line when carrying out glancing impact brake strap, slipper and run into salient point with brake wheel, and increased pressure enters metering expander 5 in the anti-lock device by the threeway connector, makes its expansion, causes the pressure decay of brake system; When brake strap, slipper and brake wheel ran into concave point, oil pressure descended in the brake system, caused metering expander 5 to shrink, and the oil that the power of contraction will be measured in the expander 5 is extruded to increase the oil pressure in the brake system.Vehicle exists the expansion-contraction-expansion of different frequency always when operation, i.e. pulsation, this pulsation is along with the difference of brake piping internal pressure changes, fluid is distributed to each wheel braking equably can make vehicle avoid producing the appearance of locking sideslip phenomenon at glancing impact, stability and safety in the time of can guaranteeing car brakeing effectively, shorten stopping distance, also can prolong brake strap, the service life of slipper and tire.

The design compared with prior art has following advantage:

1, used the principle that fluid power is divided equally, can make in the situations such as the different speed of a motor vehicle Pressure during braking in the brake pipe can be uniformly distributed in the brake pipe of four wheels.

2, the utility model has thoroughly changed the version of other design. Owing to adopted oil resistant rubber to do the metering expander, and inner chamber is designed to three different cambered surfaces, formed body geometric space more than in the cavity, the air pressure of geometric space increases or reduces pressure along with the Swelling and contraction of metering expander during braking, thereby forms corresponding pulsation.

3, the utility model only need be installed on the brake fluid system of vehicle and get final product, and need not change former car brake structure, and is easy for installation, shortened braking distance, strong and powerful during work, stable, safe and reliable when making car brakeing, simple in structure, cost is low, is convenient to promote the use of.

Claims

1, a kind of hydraulic efficiency pressure system wheel of vehicle brake anti-lock device that is used for, connect Luo bolts 3, O type seal ring 4, oily porthole 9 etc. and form by upper valve body 2, metering expander 5, following valve body 6, expansion limit body 7, it is characterized in that in the valve body 6 metering expander 5 and the expansion limit body of being made by oil proof rubber 7 being housed down, and the internal chamber wall of valve body 6 has three different cambered surfaces down.

2, hydraulic efficiency pressure system wheel of vehicle brake anti-lock device according to claim 1 is characterized in that the macropore of connection Luo bar 3 being installed by the certain size off-center in the middle of the upper valve body 2.

3, hydraulic efficiency pressure system wheel of vehicle brake anti-lock device according to claim 1 is characterized in that an Exhaust screw 1 is arranged on the upper valve body 2.

4, hydraulic efficiency pressure system wheel of vehicle brake anti-lock device according to claim 1 is characterized in that connecting Luo bolt 3 and is provided with four O type seal rings 4, and there is an oily porthole 9 at the center that connects Luo bolt 3, and the other end that connects Luo bolt 3 is fastening with six side Luo bolts 8.