CN201009874Y

CN201009874Y - Pressure changing regulation and control device of vehicle brake

Info

Publication number: CN201009874Y
Application number: CNU2007201164254U
Authority: CN
Inventors: 康亚君; 康大为
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-15
Filing date: 2007-06-15
Publication date: 2008-01-23
Anticipated expiration: 2017-06-15

Abstract

The utility model discloses a car brake variable-pressure control device which comprises an upper cover with an air inlet; two chambers equipped at two sides of a shell with an air outlet communicated with an upper chamber; a diaphragm and a transmission rod both provided inside the upper chamber, the transmission rod movably equipped below the diaphragm; a stepped piston equipped inside a lower chamber; two air inlets equipped on one side of the shell oppositely to the trapezoid cross-section of the stepped piston; a return spring equipped in a groove beneath the piston; and a valve holder equipped at the bottom of the piston. The car brake variable-pressure control device is connected with various trailer valves, relay valves or brake master cylinders via the shell bottom, so as to regulate the braking force for zero load, full load, over load and different road conditions. With the diaphragm or the piston inside the upper chamber and the stepped piston inside the lower chamber of the shell, two working chambers are formed to allow the air pressure inside the braking chamber at five levels, including two decompression levels, two compression levels and one balance level. The utility model has the advantages of balanced brake, no brake lock, rapid decrease in speed, less tire wearing, no risk of sideslip, and easy operation by the driver.

Description

Braking automobile transformation regulation device

Technical field

The utility model use that matches with the braking automobile relay valve belongs to the regulation device of relay valve.

Background technology

When automobile superimposed trailer and towed vehicle empty wagons travel, all exist main car and back trailer can not realize the shortcoming of synchronous brake during fully loaded or overload.At present, the brake relay valve that uses on superimposed trailer and the towed vehicle is of a great variety, but majority does not have depressurization, and braking effectively in the time of can only guaranteeing loaded vehicle.The empty wagons glancing impact is because trailer axle weight is lighter, during general three bridge trailer empty wagons between the total weight 6.5-7T, every tire has only 550-580kg to ground-surface pressure, and main drive axle focuses between the 4.4-5T, and every tire is 1100-1250kg to ground-surface pressure, trailing weight is light in the time of can't solving because of empty wagons, the glancing impact tire easily drags extremely, and tire is easy to wear, and main drive axle weight does not also play desirable braking effect greatly, cause deceleration bad, drive not easy to operate.

Summary of the invention

The purpose of this utility model is to provide a kind of braking automobile transformation regulation device, can supply with the rational different pressures pressurized air in drag chamber according to main drive axle, trailer axle under the different condition of load-carrying, thereby play the effect of each bridge synchronous braking.

The technical solution of the utility model is: braking automobile transformation regulation device, comprise loam cake, housing, ladder piston and valve seat, the housing upper end is spirally connected with loam cake, on be covered with induction opening, the housing two ends are provided with, lower chambers, housing is provided with induction opening and communicates with upper chamber, be provided with diaphragm and transmission push rod in the upper chamber, bottom chamber is provided with the ladder piston, the transmission push rod is movably arranged on the diaphragm below and contacts with the ladder piston, the corresponding side body of the trapezoidal faces of ladder piston is provided with two induction openings, lower chambers is divided into two operating rooms, in the ladder piston lower recess retracing spring is set, the bottom is provided with valve seat, and housing lower end and relay valve or trailer valve or master cylinder are connected.

Piston is set in the upper chamber of described housing to contact with bottom chamber ladder piston.

The utility model braking automobile transformation regulation device is connected with various trailer valves, relay valve or master cylinder by the housing lower end, thereby adjusts empty wagons, full car, overload car and different pavement conditions braking force.This regulation device is provided with diaphragm or piston in the housing epicoele, the ladder piston is set in the cavity of resorption, forms two work chamber, make the air pressure that enters brake repair room be divided into Pyatyi, decompression two-stage, supercharging two-stage, the balance one-level makes brake equalization, is difficult for locking, it is fast to slow down, reduce wear on tyres, prevent to break away, chaufeur is easy to operate.

Description of drawings

Fig. 1 is the cutaway view of the utility model braking automobile transformation regulation device front view;

Fig. 2 is the cutaway view of the front view that is connected with relay valve of the utility model regulation device;

Fig. 3 is that the utility model regulation device is looked cutaway view with the master that anxious tight brake relay valve is connected;

The cutaway view of Fig. 4 front view that to be another embodiment of the utility model regulation device be connected with anxious tight brake relay valve.

The specific embodiment

As shown in Figure 1, braking automobile transformation regulation device, comprise housing 1, loam cake 2, diaphragm 5, transmission push rod 3, ladder piston 14 and valve seat 16, the housing upper end is spirally connected with loam cake, on be covered with induction opening 4, on the housing, following two ends respectively are provided with a

chamber

6,24, housing is provided with induction opening 13 and communicates with upper chamber, be provided with diaphragm 5 and transmission push rod 3 in the upper chamber 6, transmission push rod 3 is arranged on below the diaphragm 5, transmission push rod upper end contacts with diaphragm is movable, the push rod lower end contacts with the ladder piston 14 of setting in the lower chambers 24, and corresponding upper shell one side in two terraced planes of ladder piston is provided with two

induction openings

7,8, lower chambers is divided into two operating rooms of piston, retracing spring 15 is set in the piston lower recess, and the bottom is provided with valve seat 16.

As shown in Figure 2, this regulation device is connected with relay valve, described relay valve mainly is made up of housing 10, air inlet and exhaust valve 17 and gland 11, air inlet and exhaust valve 17 is set in the housing, and air inlet and exhaust valve and gland 11 flexibly connect, air inlet and exhaust valve upper end and valve seat 16 movable contacts, the bottom is by jump ring 19 location, housing one side is provided with induction opening 18 and deflation hole 9, for guaranteeing air inlet and exhaust valve 17 working environments, also is provided with cover of dust 12 below gland.

The utility model induction opening 4 is connected with master cylinder freeing pipe or trailer valve brake pipe, and induction opening 18 is connected with air receiver.The utility model also needs external three two triple valves, realizes decompression and function of increasing pressure.Wherein the admission port of triple valve a is connected with deflation hole 9, and air extractor duct is connected with induction opening 13; The admission port of triple valve b is connected with induction opening 4, and air extractor duct is connected with induction opening 7; The admission port of triple valve c is connected with induction opening 4, and air extractor duct is connected with induction opening 8.When master cylinder freeing pipe during to induction opening 4 air feed, diaphragm 5 moves down and promotes transmission push rod 3, promote piston 14 and move down, valve seat 16 is moved down, open air inlet and exhaust valve 17, make pressurized air flow to deflation hole 9 through induction opening 18, lead to brake repair room and carry out braking work, stop induction opening 4 air feed, promptly make to move on the valve seat to promote to move on the piston by retracing spring, the brake repair room pressurized air is discharged, and promptly stops braking work.Turn off all triple valves, induction opening 4 and air gate 8 equalization of pressure equate, keep original relay valve operation pressure, open triple valve a, make deflation hole 9 pressurized airs flow to diaphragm 5 bottom surfaces through induction opening 13, the promotion diaphragm moves up, and the pressure ratio that makes induction opening 4 and air gate 9 is about 2: 1, realizes the one-level depressurization.When opening triple valve a and triple valve b simultaneously, when induction opening 7 air feed, decompression is weakened, the pressure ratio of induction opening 4 and air gate 9 is about 4: 3, realizes second depressurized.Turn off triple valve a, open triple valve b, make air flow into induction opening 7 through induction opening 4, enter operating room of piston, promote descent of piston, the pressure ratio of induction opening 4 and air gate 9 is about 2: 3, plays the one-level pressurization.Turn off triple valve a, open triple valve b, 3 simultaneously, make the air of induction opening 4 flow into the pistons work chamber through

induction opening

7,8, promote descent of piston, the pressure ratio of induction opening 4 and air gate 9 is about 1: 2, plays the two stage supercharging effect.

When deadhead operation, the trailer car tyre surface pressure is little, uses the one-level decompression; When travelling semi-load, use the second depressurized function.Be fully loaded with and use original equilibrium of pressure function when travelling.Use the one-level function of increasing pressure when part overloads, use the two stage supercharging function when seriously overloading, also can grasp flexibly and use its various functions,, prevent the effect of breakking away to reach brake equalization according to the road surface situation.

The utility model braking automobile transformation regulation device is connected with the emergency brake relay valve, also can realize the emergency braking of trailer.As shown in Figure 3, described emergency brake relay valve, form by blow off valve 17, piston 25, emergency braking spring 20 and gland 11, air inlet and exhaust valve is provided with in the piston 25, the piston lower end is arranged in the orienting sleeve 21, the orienting sleeve lower end is by jump ring 19 location, and emergency braking spring 20 is arranged between piston and the gland 11, and housing one side is provided with check valve 22 and induction opening 23.When induction opening 23 pressure were lower than 0.3Mpa, the emergency braking spring promoted to move on the piston, opens air inlet and exhaust valve and makes the air of induction opening 18 flow to brake repair room through air inlet and exhaust valve, carries out braking work.The emergency braking spring is promoted downwards to be compressed to bottom dead point by piston 25 when induction opening 23 pressure are higher than 0.3Mpa, and air inlet and exhaust valve 17 is closed, and makes the valve seat 16 of transmission push rod setting leave air inlet and exhaust valve 17, brake repair room air exhaustion, brake off.

As shown in Figure 4, it is another embodiment of the utility model braking automobile transformation regulation device supporting use that can be connected with the emergency brake relay valve, diaphragm 5 and transmission push rod 3 that piston 26 is replaced in the housing upper chamber are set in the housing upper chamber of described braking automobile transformation regulation device, and piston 26 contacts with the ladder piston of bottom chamber.Emergency brake relay valve structure is identical with Fig. 3's, can reach Fig. 3 effect same.

Claims

1. braking automobile transformation regulation device, comprise loam cake (2), housing (1), ladder piston (14) and valve seat (16), it is characterized in that: the housing upper end is spirally connected with loam cake, on be covered with induction opening (4), the housing two ends are provided with chamber (6 up and down, 24), housing is provided with induction opening (13) and communicates with upper chamber, the interior activity of upper chamber (6) is provided with diaphragm (5) and transmission push rod (3), ladder piston (14) is set in the lower chambers (24), the transmission push rod is movably arranged on the diaphragm below and contacts with the ladder piston, on the corresponding side body of the ladder plane of ladder piston two induction openings (7 are set, 8), lower chambers is divided into two operating rooms, retracing spring (15) is set in the ladder piston lower recess, and the bottom is provided with valve seat (16), and housing lower end and relay valve or trailer valve or master cylinder are connected.

2. braking automobile transformation regulation device according to claim 1 is characterized in that: piston (26) is set in the upper chamber of described housing contacts with bottom chamber ladder piston (14).