CN87202620U

CN87202620U - Safety main pump with multifunction

Info

Publication number: CN87202620U
Application number: CN 87202620
Authority: CN
Inventors: 徐忠琦
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-02-25
Filing date: 1987-02-25
Publication date: 1987-11-04

Abstract

The utility model discloses a safety main pump with multifunction, which is suitable for the hydraulic braking systems of various vehicles. The safety main pump with multifunction not only has the braking function of a main pump, but also has the functions of automatic plugging and acoustic-optical alarm of a safety device. The safety main pump with multifunction is composed of a main pump and a safety device which are directly cast, and the automatic leakage plugging device of the safety device is composed of a plunger valve and an oil outlet connector which is inlaid with oil-resistant rubber. When a driver carries out a braking, if one axle shaft is damaged and leaks, the safety device can plug automatically to achieve single-bridge braking, and simultaneously, audible and visible signals alarm to make the driver acquaint the axel shaft which generates oil leakage to ensure the running safety of the vehicle.

Description

Safety main pump with multifunction

The casting of a kind of master brake cylinder that is used for hydraulic vehicle brake system, particularly master cylinder and safety cylinder (or safety) is connected into one, can automatic leakage-blocking, the acousto-optic multifunctional safe master cylinder of reporting to the police simultaneously.

Existing vehicle master cylinder and safety cylinder couple together with metal oil conduit.When this section pipeline generation leakage of oil, whole brake system lost efficacy.Another kind of dual line braking master cylinder only plays the dual line braking effect, guarantees to realize single bridge braking, but does not have automatic leakage-blocking and acoustic-optic alarm.The driver can not in time take measures (as underspeeding) improve traveling security.

Existing safety cylinder generally is made up of two groups of pistons and piston seat and valve rod.When leakage of oil appears in the brake system on the vehicle bridge, can not automatic leakage-blocking, must stop and repair.Another kind of safety cylinder (be referring to Patent Office of the People's Republic of China's application number 8620194 utility model patent), its principal feature is to have added the automatic leakage-blocking device that a cover is made up of guiding valve, guiding valve toggle mechanism, seal ring, balance post rod, balance spring.Its intention solves automatic leakage-blocking, and makes chaufeur know the vehicle bridge of leakage of oil immediately by wigwag, improves the safe reliability of driving.But this safety cylinder complex structure, part (38 kinds) of a great variety.Volume is big (160 * 133 * 55), and cost is also higher.And the shortcoming of this safety cylinder maximum is that automatic leakage-blocking is not thorough, can not implement.This be because: 1, balance post rod of She Zhiing and balance spring can not play equilibrium activity, can only make leak stopping not thorough.Because guiding valve axially moves under the difference of pressure effect, after the leak stopping, brake pedal unclamps, piston return, guiding valve pressure at two ends difference are tending towards disappearing, and compressed balance spring reacts on the axial force of guiding valve greater than the in opposite directions power of another balance spring to guiding valve, make guiding valve to the slight reset movement of middle intercropping, sealing place of leak stopping produces the gap, whenever steps on brake pedal later on one time, just with leakage of oil once.Also proved this point by in-place test.2, the bayonet lock toggle mechanism that guiding valve is set is unnecessary, and it only can influence the effect of leak stopping.Because under the difference of pressure effect, guiding valve also has circular movement slightly moving axially simultaneously, and bayonet lock is clamped in the slippage slot easily, stops guiding valve axially displaced, the purpose of out of reach leak stopping, and the bayonet lock retainer spring can not be located, and can not operate.Guiding valve is in the later reset issues of leak stopping, and only need be dialled with little bottle opener and just can solve.

The purpose of this utility model provides a kind of with master cylinder and safety multifunctional safe master cylinder cast in block, and it can play a part, and master cylinder also can play the safety automatic leakage-blocking simultaneously, acousto-optic is reported to the police simultaneously.And, also make volume of the present utility model reduce greatly, cost reduces greatly.

This multifunctional safe master cylinder is made up of master cylinder and safety two parts.Its structure is that total pump case and the casting of safety housing are connected together; The oil pressure switch direct connection is on safety oil-feed duct.

The safety of this multifunctional safe master cylinder then is to improve on the basis of existing safety cylinder.Its structure is formed two oil cylinders by piston, piston spring and plug screw, and wherein the top of piston studs with oil proof rubber; The discharge outlet that is studded with oil proof rubber by plunger valve and end is formed automatic leakage-blocking device and output circuit; On plunger valve interlude roundlet cylinder, be provided with two root elevator bars.Under normal circumstances, piston keeps certain distance by piston spring and safety oil cylinder bottom surface; The contact piece spring of tappet and sound light alarming circuit keeps certain interval.

When chaufeur is implemented glancing impact, total pump push rod promotes total pump piston and moves, and the brake noise in the master cylinder is input to safety by fuel feed hole, is flowed to the brake cylinder of vehicle bridge and back vehicle bridge before the automobile more respectively by safety.If there is a brake system on the vehicle bridge to be damaged, when leakage of oil occurring, oil pressure in the side output circuit that then communicates with this vehicle bridge reduces, produce a bigger pressure reduction at the safety piston two ends that communicate with this oil circuit, under the pressure differential effect, piston rises, and is pressed on the safety oil cylinder bottom surface, and the oil proof rubber of piston tip cuts off the passage of this output circuit.Make the oil pressure in the output circuit of leakage of oil one side reduce to zero.And other end output circuit still is in high pressure conditions.To low pressure one side shifting, be pressed on the oil proof rubber of discharge outlet under the effect of safety plunger valve at both ends pressure differential, thoroughly sealed the output circuit that leakage of oil one side takes place, make other end output circuit normal operation, promptly vehicle is realized single bridge braking.Simultaneously, when plunger valve moved, the tappet of jack-up one side contacted with the sheet spring, and sound light alarming circuit is connected, and buzzer phone and indicator lamp send sound, visual alarm simultaneously, show the vehicle bridge that leakage of oil takes place.Safety is promptly finished the effect that automatic leakage-blocking, acousto-optic are reported to the police simultaneously.Meanwhile, oil pressure switch is subjected to brakes on lamp behind the pressure of master cylinder brake noise, makes stoplight stop lamp luminous.

The multifunctional safe master cylinder had both played the effect of master cylinder, played the effect that safety automatic leakage-blocking, acousto-optic are reported to the police simultaneously again, had saved the connected component between the master cylinder and safety cylinder (safety) in the prior art.And the safety automatic leakage-blocking in the multifunctional safe master cylinder is thorough, and the part kind significantly reduces (16 kinds), and volume also reduces (106 * 80 * 47), and cost reduces.This safety can not only use with the master cylinder cast solid, also can produce separately with master cylinder to connect use by metal oil conduit.Improved travel safety greatly.

Be further described below in conjunction with accompanying drawing:

Fig. 1 is front view of the present utility model (half size scale);

Fig. 2 is an A-A cutaway view of the present utility model, i.e. safety cutaway view (half size scale) in the utility model;

Fig. 3 is the front view (compare rule 1:1) of safety in the utility model;

Fig. 4 is the birds-eye view (compare rule 1:1) of safety in the utility model

Fig. 5 is a sound light alarming circuit of the present utility model.

Referring to Fig. 1, total pump case 1 is connected together with 2 castings of safety housing and forms total housing of the present utility model; Oil pressure switch 3 directly is connected on the safety oil-feed duct 4.When working, the brake noise in the master cylinder is input in the safety oil cylinder 8 by fuel feed hole 7.Referring to Fig. 3, the safety in the multifunctional safe master cylinder is formed two safety oil cylinders 8 by piston 9, piston spring 10 and plug screw 13, and wherein the top of piston 9 studs with oil proof rubber 11; Form automatic leakage-blocking device and output circuit by plunger valve 12 and the discharge outlet 15 that studs with oil proof rubber 14; On plunger valve 12 interlude roundlet cylinders, be provided with two root elevator bars 16.Under the normal circumstances, piston 9 is by the bottom surface maintenance certain distance of piston spring 10 with safety oil cylinder 8; Tappet 16 keeps certain interval with the contact piece spring 17 of sound light alarming circuit.At this moment the safety output circuit communicates with the brake system of front and back vehicle bridge respectively; And buzzer phone 18 and indicator lamp 19 are in closed condition.

When chaufeur enforcement glancing impact, total pump push rod 5 promotes total pump pistons 6 and moves, and brake noise is input to the oil cylinder 8 of safety by fuel feed hole 7.If there is a brake system on the vehicle bridge to be damaged, when leakage of oil occurring, safety piston 9 two ends that oil pressure is reduced in and this oil circuit communicates that then communicate with this vehicle bridge in the side output circuit produce a bigger pressure reduction, under differential pressure action, piston 9 rises, be pressed on the bottom surface of safety oil cylinder 8, the oil proof rubber on piston 9 tops 11 cuts off the passage 20 of these output circuits, makes the oil pressure in the output circuit of leakage of oil one side reduce to zero.And other end output circuit still is in high pressure conditions.To low pressure one side shifting, be pressed on the oil proof rubber 14 of discharge outlet 15 under the 12 at both ends pressure differential effects of safety plunger valve, thoroughly sealed the output circuit that leakage of oil one side takes place, make other end output circuit normal operation, promptly vehicle is realized single bridge braking.Simultaneously, when plunger valve 12 moved, the tappet 16 of jack-up one side contacted with warning circuit contact piece spring 17, and sound light alarming circuit is connected, and buzzer phone 18 and indicator lamp 19 send sound, visual alarm simultaneously, show the vehicle bridge that leakage of oil takes place.Safety is promptly finished the effect that automatic leakage-blocking, acousto-optic are reported to the police simultaneously.Meanwhile, oil pressure switch 3 is subjected to brakes on lamp behind the pressure of master cylinder brake noise, makes stoplight stop lamp luminous.

After vehicle ' finishes the reparation of leakage of oil position, to stir plunger valve 12 with little bottle opener and reset to midway location, buzzer phone 18 and indicator lamp 19 are closed, and the multifunctional safe master cylinder recovers normal doube bridge braking mode again.Guaranteed the safe reliability of vehicle '.

Claims

A kind of multifunctional safe master cylinder is characterized in that:

A, total pump case 1 are connected into one with 2 castings of safety housing; Oil pressure switch 3 direct connections are on the oil-feed duct 4 of safety;

B, safety automatic leakage-blocking device are made up of plunger valve 12 and the discharge outlet 15 that studs with oil proof rubber 14; In the safety oil cylinder piston 9 tops stud with oil proof rubber 11; The face of cylinder, safety plunger valve (12) middle part is provided with two root elevator bars 16;

The contact mechanism of c safety warning circuit is made up of tappet 16 and contact piece spring 17.