CN201863829U

CN201863829U - Hydraulic antilock brake apparatus

Info

Publication number: CN201863829U
Application number: CN201020639858XU
Authority: CN
Inventors: 窦兰梅; 王星
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-06-15
Anticipated expiration: 2020-11-26

Abstract

The utility model discloses a hydraulic antilock brake apparatus which is provided with an oil tank filled with hydraulic oil, a pump motor set, a check valve, a pilot overflow valve, a manual two-position three-way valve, an adjustable throttle valve, a high pressure oil inlet pipe and an oil return pipe, wherein the high pressure oil inlet pipe and the oil return pipe are connected with a mutual negative feedback hydraulically-controlled two-position four-way valve; the mutual negative feedback hydraulically-controlled two-position four-way valve is connected with a brake cylinder; the brake cylinder is connected with a friction plate; two ends of the inner cavity of the mutual negative feedback hydraulically-controlled two-position four-way valve are provided with quick jump valve holes communicated with a core cavity of the mutual negative feedback hydraulically-controlled two-position four-way valve; a quick jump valve is arranged in the quick jump valve holes; two ends of the inner cavity of the brake cylinder are provided with feedback slots; and the feedback slots are communicated with the quick jump valve holes through an oil channel. Compared with the prior art, as impact force is used for replacing friction force, the brake frequency of the brake plate is more than 300 times per second; working through the impact force is realized; the inertia force is weakened; a brake can not be locked; the brake distance is greatly shortened; getting out of control on direction and side skidding during emergency braking can be effectively avoided, and running safety is guaranteed.

Description

The hydraulic pressure anti-lock brake system

Technical field

The utility model belongs to vehicle braking device, is specifically related to a kind of hydraulic pressure anti-lock brake system of fluid control.

Background technology

Anti-lock brake system is when car brakeing, can prevent the complete locking of wheel and out of control device.Automobile newly developed generally all has been equipped with this device at present.At glancing impact, usually because all factors, the brake efficiency of four wheels is inconsistent, and the part wheel lockup takes place, thereby sideslip, the out of control and phenomenon of breakking away or the like occur.Particularly when running at high speed emergency braking, often, cause serious casualty accident because of certain wheel lockup get out of hand.Therefore, people have developed anti-lock brake system.The purpose that it is main makes four car side brakes can both bring into play its maximum brake efficiency exactly, and don't the meeting locking, thereby shortens stopping distance, and improves road-holding property.Anti-lock brake system comprises sensor, controller and regulating control.Controller and regulating control generally are micro controller systems.When chaufeur was stepped on brake pedal, master brake cylinder was given wheel cylinder according to the certain hydraulic pressure of the size output of treadle effort.Be contained in the variation that the sensor monitors on the wheel the wheel cireular frequency, the information of being about to of existing side by side is passed to controller, and in a single day controller finds that bigger variation appears in cireular frequency, just sends instruction and gives regulating control, regulates the brake-pressure of car side brake oil cylinder.Promptly in the time of wheel locking soon, reduce brake-pressure, wheel is in seemingly stop non-stopping, roll not only but also sliding state, with the ground-surface friction force all the time near maximum static friction force, then, increase brake-pressure again, reduce pressure again up to wheel locking soon.Each second can be so repeatedly about ten times.Like this, maximum brake efficiency can be obtained on the one hand, wheel lockup can be avoided and get out of hand again on the one hand.Anti-lock brake system is after using on the automobile, and effect is fine, and particularly on easily sliding ice and snow road, effect is remarkable, on average can shorten stopping distance 20-30%, has improved the safety performance of automobile greatly.The volume of electronic type ABS is big, and entire vehicle not necessarily has enough space mounting electronics ABS, electronic type ABS is that the instant at wheel locking begins effect, act on each second 6～12 times, increase the frequency that point is stopped, make the braking force of brake more linear, it is more steady to brake, can reduce braking distance, but the frequency that the prior art mid point is stopped commutates by electromagnetic valve and realizes, because the frequency that the speed of response of coil has determined point to stop in the electromagnetic valve can't improve again, has therefore also determined existing brake structure can not shorten stopping distance significantly.

The utility model content

For solving the above-mentioned defective that prior art exists, the purpose of this utility model is to provide a kind of compact conformation, and braking is steadily shortened the hydraulic pressure anti-lock brake system of braking distance.

For achieving the above object, the technical solution adopted in the utility model is: this hydraulic pressure anti-lock brake system, have fuel tank, pump motor group, check valve, pilot overflow valve, manual two position three-way valve, adjustable throttling, high pressure oil inlet and oil return pipe that hydraulic oil is housed, it is characterized in that: described high pressure oil inlet is connected mutual inverse feedback hydraulic control two-position four-way valve with oil return pipe, inverse feedback hydraulic control two-position four-way valve connects brake cylinder mutually, and brake cylinder is connected with friction lining; The inner chamber two ends of described mutual inverse feedback hydraulic control two-position four-way valve are provided with the fast jumping valve opening that is connected with spool chamber, jump valve soon and are positioned at fast jumping valve opening, and the two ends of described brake cylinder inner chamber are provided with the feedback groove, and the feedback groove is communicated with the fast valve opening of jumping by oil duct.

Described brake cylinder is two, and is oppositely arranged.

The mouth of described check valve is parallel with the hydraulic control two position three-way valve, and the mouth of hydraulic control two position three-way valve is provided with manual two position three-way valve, and manually the mouth of two position three-way valve is provided with brake cylinder, and brake cylinder is connected with tension type braking during standstill brake facing.

The mouth of described check valve is parallel with energy storage.

Adopt the beneficial effect of technique scheme: the dynamical element of this hydraulic pressure anti-lock brake system is by fuel tank, the pump motor group, pilot overflow valve, manual two position three-way valve, adjustable throttling is formed, the oil inlet of dynamical element is connected with mutual inverse feedback hydraulic control two-position four-way valve, inverse feedback hydraulic control two-position four-way valve connects brake cylinder mutually, brake cylinder is connected with friction lining, inverse feedback hydraulic control two-position four-way valve two ends are provided with two fast valves of jumping mutually, the spool that fast jumping valve can promote the hydraulic control two-position four-way valve is lived double action and is done, thereby adjustment is connected with the brake cylinder oil circuit, the piston rod of realization brake cylinder is done straight reciprocating motion, drive friction lining and contact fast, realize braking with braking automobile wheel hub or video disc.By regulating the flow of adjustable throttling, and by the brake cylinder and the mutual inverse feedback of inverse feedback hydraulic control two-position four-way valve mutually, and adjust the commutating frequency of the piston rod of inverse feedback oil cylinder by adjustable throttling.The oil circuit speed of response of brake cylinder can reach 1250-1350m/s, can realize 300 times/second braking frequency, is equivalent to ceaselessly brake, loosen.This anti-lock brake system utilizes the impulsive force work done, replaces traditional friction force work done, by conservation energy formula 1/2MV ²=10FS works as V as can be known ²One regularly, braking force F is big more, stopping distance S is then shorter, and by physics as can be known, impulsive force is 20～200 times of friction force, hence one can see that, replace the friction force work done by the impulsive force work done, can shorten stopping distance greatly, as can be known by brake application curve, the friction force braking is to be made of two straight lines, be steep line and the less skew lines of the slope in later stage that the speed at deceleration initial stage is fallen suddenly, initial stage acceleration/accel-a is big slowing down, and causes rotation inertia force big, braking frequency is at 300 times/second braking frequency, realized the impulsive force work done, this moment, braking curve was a skew lines that slope is less, and acceleration/accel-a is less, force of inertia is little, has shortened stopping distance greatly.Therefore, this anti-lock brake system can be avoided direction out of control and wheel side sliding when emergency brake, make wheel when brake not by locked, do not allow tire on a point with ground friction, thereby the increasing friction force reaches more than 98% braking efficiency, has guaranteed the safety of brake, can also reduce simultaneously brake and consuming, prolonging brake wheel hub, video disc and the service life of tire more than two times.

Description of drawings

Below in conjunction with accompanying drawing specific embodiments of the invention are described in further detail.

Fig. 1 is the structural representation of hydraulic pressure anti-lock brake system of the present invention.

Fig. 2 is the structural representation that can be used for the anti-lock brake system of disc type disc brake.

The specific embodiment

Hydraulic pressure anti-lock brake system as shown in Figure 1, be mainly used in the drum brakes system, have fuel tank 1, pump motor group 3, check valve 5, pilot overflow valve 6, manual two position three-way valve 7, adjustable throttling 8, high pressure oil inlet 9 and oil return pipe 25 that hydraulic oil is housed.Be provided with dividing plate 2 in the fuel tank 1, the fuel tank lower space is divided into two parts, so that the hydraulic oil of oil return pipe output precipitates, the inlet of pump motor group 3 is positioned at dividing plate one side fuel tank, the delivery pipe of pump motor group 3 is connected with check valve 5, check valve 5 connects pilot overflow valve 6 and manual two position three-way valve 7, the outlet of pilot overflow valve 6 is communicated with fuel tank 1, manually the outlet of two position three-way valve 7 connects adjustable throttling 8, with adjustable throttling 8 bonded assembly high pressure oil inlets 9 output high pressure oils, the pipeline of oil return pipe 25 is provided with micronic filter 4, and oil return pipe 25 outlets are positioned at the opposite side fuel tank of Partition board for fuel tank.The mouth of described check valve is parallel with energy storage 32, can keep the pressure in the high pressure oil inlet 9 and make pressure steady.Described high pressure oil inlet 9 is connected mutual inverse feedback hydraulic control two-position four-way valve 11 with oil return pipe 25, inverse feedback hydraulic control two-position four-way valve 11 connects brake cylinder 19 mutually, and brake cylinder 19 is connected with friction lining 22.Inverse feedback hydraulic control two-position four-way valve has valve body 11 mutually, be provided with spool chamber in the valve body 11, spool 13 is positioned at spool chamber, valve body 11 is provided with that height presses oily oil-feed P mouth and height presses oily oil return O mouth, height presses oily oil-feed P mouth and is connected with high pressure oil inlet 9, height presses oily oil return O mouth and is connected with oil return pipe 25, axial direction is provided with back leakage groove 14 on the inwall at the spool chamber two ends of inverse feedback hydraulic control two-position four-way valve mutually, make spool 13 when being positioned at a side position of spool chamber, keep the spool chamber of spool end to be connected with oil return pipe, resistance of motion when reducing the spool commutation, be positioned on the valve body at spool chamber two ends and be respectively equipped with the fast jumping valve opening 10 that is connected with spool chamber, 17, jump valve 12 soon, 16 are positioned at fast jumping valve opening 10, in 17; Brake cylinder 19 is divided into piston-less lumen and rod end chamber is arranged by piston 20, brake cylinder 19 inner chamber two ends are provided with inverse feedback groove 18 and following inverse feedback groove 21, last inverse feedback groove 18 is connected with the fast jumping valve opening 17 of mutual inverse feedback hydraulic control two-position four-way valve 11, following inverse feedback groove 21 is communicated with control oil duct 24, the outlet of control oil duct 24 is communicated with the fast jumping valve opening 10 of mutual inverse feedback hydraulic control two-position four-way valve 11, piston-less lumen upper end sidepiece is communicated with oil cylinder epicoele passage 15, the other end of oil cylinder epicoele passage 15 is communicated with hydraulic control two-position four-way valve A mouth, have rod end chamber lower end sidepiece to be communicated with oil cylinder cavity of resorption passage 23, the other end of oil cylinder cavity of resorption passage 23 is communicated with the B mouth of mutual inverse feedback hydraulic control two-position four-way valve 11.Hydraulic pressure anti-lock brake system as shown in Figure 2 is mainly used in disc brake system.Described mutual inverse feedback hydraulic control two-position four-way valve 11 connects two brake cylinders 19,26, these two brake cylinders 19,26 are oppositely arranged, brake cylinder 19,26 is connected with friction lining 22,27 respectively, under the driving of brake cylinder 19,26, drive two friction linings 22,27 crank motion simultaneously, disc is held, unclamps tightly the realization point fast stop.As further improvement, mouth at check valve 5 is parallel with hydraulic control two position three-way valve 28, the mouth of hydraulic control two position three-way valve 28 is provided with manual two position three-way valve 29, manually the mouth of two position three-way valve 29 is provided with brake cylinder 30, having of brake cylinder 30 is provided with spring 31 in the rod end chamber, brake cylinder is connected with tension type braking during standstill brake facing.When pressure is not enough in the hydraulic efficiency pressure system, service braking system can't normal operation, the dangerous situation that brake was lost efficacy appears, this moment, hydraulic oil can't normally be opened hydraulic control two position three-way valve 28, hydraulic oil is flowed directly to fuel tank by the return opening of hydraulic control two position three-way valve 28, so brake cylinder 30 can't start, makes tension type braking during standstill brake facing locking automotive wheel hub or brake disc under the effect of the spring in brake cylinder 30, realize braking, guarantee driving safety.When hydraulic system pressure increased to normal pressure, brake cylinder 30 moved, and overcomes the pressure of spring, and braking is removed, and vehicle can cruising.

Claims

1. hydraulic pressure anti-lock brake system, have fuel tank, pump motor group, check valve, pilot overflow valve, manual two position three-way valve, adjustable throttling, high pressure oil inlet and oil return pipe that hydraulic oil is housed, it is characterized in that: described high pressure oil inlet is connected mutual inverse feedback hydraulic control two-position four-way valve with oil return pipe, inverse feedback hydraulic control two-position four-way valve connects brake cylinder mutually, and brake cylinder is connected with friction lining; The inner chamber two ends of described mutual inverse feedback hydraulic control two-position four-way valve are provided with the fast jumping valve opening that is connected with spool chamber, jump valve soon and are positioned at fast jumping valve opening, and the two ends of described brake cylinder inner chamber are provided with the feedback groove, and the feedback groove is communicated with the fast valve opening of jumping by oil duct.

2. hydraulic pressure anti-lock brake system according to claim 1 is characterized in that: described brake cylinder is two, and is oppositely arranged.

3. hydraulic pressure anti-lock brake system according to claim 1 and 2, it is characterized in that: the mouth of described check valve is parallel with the hydraulic control two position three-way valve, the mouth of hydraulic control two position three-way valve is provided with manual two position three-way valve, manually the mouth of two position three-way valve is provided with brake cylinder, and brake cylinder is connected with tension type braking during standstill brake facing.

4. hydraulic pressure anti-lock brake system according to claim 1 and 2 is characterized in that: the mouth of described check valve is parallel with energy storage.

5. hydraulic pressure anti-lock brake system according to claim 3 is characterized in that: the mouth of described check valve is parallel with energy storage.