CN2633682Y

CN2633682Y - Normally open booster electromagnetic valve for car ABS braking system

Info

Publication number: CN2633682Y
Application number: CN 03265665
Authority: CN
Inventors: 梁宝来; 梁柏松; 任坤民; 张维民; 高耀初; 梁江海
Original assignee: Zhejiang Chunhui Intelligent Control Co Ltd
Current assignee: Zhejiang Chunhui Intelligent Control Co Ltd
Priority date: 2003-06-10
Filing date: 2003-06-10
Publication date: 2004-08-18
Anticipated expiration: 2013-06-10

Abstract

A normal-open booster solenoid valve for car ABS braking system belongs to solenoid valve technology for braking. The utility model comprises a valve (16), a valve base (6) having a valve port (17); the valve base (6) is of extrusion connection to the valve (16);a normal-closed reducing valve interface (5) with a ring filtering net and a braking pump interface (15) are respectively arranged at the two sides of the valve (16); a static iron core (3), a movable iron core (1) having a valve lever (18) and a backward spring (4) are arranged on the valve; a check valve channel (13) having a check ball valve (12), a lower filtering net (8), a check valve blocking blade (11) having a throttle hole (9) are arranged at the outer and lower sides of the valve. The utility model is of reasonable design, a compact structure, convenient manufacturing, and the utility model adopts extrusion technology and high accuracy positioning method to assemble the valve base and the valve, so three parts, that is, press jacket, O-shaped ring and spring are removed from the prior solenoid valve; the utility model can avoid ball seat aging, so the service life, safety an reliability of the normal-open booster solenoid valve are enhanced.

Description

Anti-block braking system of car is often opened boost electromagnetic valve

Technical field

The utility model relates to a kind of anti-block braking system of car and often opens boost electromagnetic valve, belongs to automobile brake electromagnetic valve technical field.

Background technology

As everyone knows, experienced driver, when being everlasting drag, phenomenon such as the sideslip that produces when taking that the braking method that pedal one is stepped on a pine prevented the automotive wheel locking, whipping.And anti-block braking system of car (hereinafter to be referred as ABS) can realize automatically successfully that this steps on the automobile brake form of a pine.

At present, popular in the world ABS though multiple version is arranged, all has three parts of sensor, electronic control package (ECU) and hydraulic control device (HCU) to form, form mechanical, electrical, hydraulic pressure is integrated, thereby reach wheel not by locking phenomenon.The hydraulic efficiency governing principle of ABS is to be provided with one at each wheel often to open boost electromagnetic valve and a normally closed vacuum solenoid valve, and their series connection are used in hydraulic tubing.When normal brake application, ABS no power, the pressure of brake system master cylinder directly enter brake cylinder by the brake system master cylinder through often opening boost electromagnetic valve.When wheel lockup is critical, sensor sends signal, ABS gets electric work, this moment, electromagnetic valve divided three kinds of service conditions: (1) is often opened boost electromagnetic valve and is become and end, normally closed vacuum solenoid valve no power also becomes to end, then the pressure between brake cylinder and brake cylinder master cylinder and the backwash pump is isolated, and promptly the brake-pressure in the wheel cylinder keeps; (2) often open boost electromagnetic valve and become and end, normally closed vacuum solenoid valve energising becoming conducting, the braking liquid in the wheel cylinder flows into energy storage and backwash pump by outlet valve, and the brake-pressure in the wheel cylinder reduces, backwash pump work, braking liquid is sent master cylinder back to; (3) often open boost electromagnetic valve outage becoming conducting, normally closed boost electromagnetic valve cuts off the power supply for becoming and ends, and this is consistent with normal brake application, the brake-pressure increase in the wheel cylinder.

Be connected by gland, " O " type circle, spring between the existing valve seat of often opening boost electromagnetic valve and the valve body, though have the better seal effect, but, there are defectives such as complex process, element precision requirement height, difficulty of processing are big because parts are more on its structure design.

Summary of the invention

The purpose of this utility model provides a kind of reasonable in design, and compact conformation is easy to process, can effectively improve the anti-block braking system of car of often opening boost electromagnetic valve service life and safe reliability and often open boost electromagnetic valve.

The utility model is that anti-block braking system of car is often opened boost electromagnetic valve, comprise valve body, place the valve seat of band valve port in the valve body, it is characterized in that valve seat connects for extruding with valve body, the valve body both sides are respectively equipped with the normally closed vacuum solenoid valve interface and the brake cylinder interface of band filter screen; The top of described valve body is provided with static iron core, and static iron core top is provided with the moving iron core of band valve rod and retracing spring, and valve rod passes static iron core vertically downward; The described valve body lower end outside is provided with the lower end filter screen; Offer the braking liquid passage that is connected with the import of master cylinder braking liquid in the described valve seat.

Described moving iron core upper end also can be provided with dolioform buffering knot.

After can adopting riveted joint, described valve rod and moving iron core be connected into one.

Described moving iron core and static iron core also can coat plunger tube outward and be connected into one with the valve body extruding.

Also can be provided with the check valve passage of band check valve ball between described brake cylinder interface and the valve body lower end, valve body lower end also can be provided with the check valve catch of band cutoff port.

The utility model compared with prior art has following outstanding advantage and good effect:

1, valve seat and valve body adopt extrusion process and high fix frock, can guarantee the requirement of its right alignment, gland, " O " type circle, three parts of spring in the existing electromagnetic valve have been reduced simultaneously, make structure compact more, also can avoid seal ring aging, thereby improve service life and the safe reliability of often opening boost electromagnetic valve.

2, owing to often open the boost electromagnetic valve compact conformation, valve rod travel requires high, and response time is short, is processed into the buffering knot with Telescopic so will move iron core top, make it to regulate better and assemble, thereby can adjust and control the response time of boost electromagnetic valve valve rod travel and action better; Guarantee product design, and can reduce because the noise that stem movement produces.

3, the supporting use of the utility model and anti-block braking system of car (ABS) can prevent effectively that automobile from glancing impact, whipping occurring, breaks away, and drives dangerous phenomenon such as skid, and guarantees road-holding property and shortens stopping distance.

Description of drawings

Fig. 1 is the existing integral structure cutaway view of often opening boost electromagnetic valve;

Fig. 2 is an integral structure cutaway view of the present utility model.

Among the figure: 1 is moving iron core, and 2 is plunger tube, and 3 is static iron core, and 4 is retracing spring, 5 is normally closed vacuum solenoid valve interface, and 6 is valve seat, and 7 is the braking liquid passage in the valve seat, and 8 is the lower end filter screen, 9 is cutoff port, and 10 is the import of master cylinder braking liquid, and 11 is the check valve washer, and 12 is check valve ball, 13 is the check valve passage, and 14 are the ring filter screen, and 15 is the brake cylinder interface, and 16 is valve body, 17 is valve port, and 18 is valve rod, and 19 are the buffering knot, 20 is spring, and 21 is gland, and 22 is " O " type circle.

The specific embodiment

The utility model is mainly by valve body 16, place the valve seat 6 of the moving iron core 1 with dolioform buffering knot 19, valve rod 18, retracing spring 4, static iron core 3, band valve port 17 and the braking liquid passage 7 that set gradually in the valve body 16 from top to bottom, place the normally closed vacuum solenoid valve interface 5 and the brake cylinder interface 15 of valve body 16 both sides band filter screens 14 respectively, place the check valve passage 13 of band check valve ball 12 between brake cylinder interface 15 and valve body 16 lower ends, place check valve catch 11 formations such as grade of the lower end filter screen 8 and the band cutoff port 9 of valve body 16 lower ends.Valve seat 6 and valve body 16 adopts extrusion processes to connect, has the constructional feature of no leak, and reduced to have now and often opened gland 21, " O "

type circle

22,20 3 parts of spring (as shown in Figure 1) between the valve body 16 and valve seat 6 in the boost electromagnetic valve.Valve rod 18 is connected into one after adopting riveted joint with moving iron core 1, and passes static iron core 3 vertically downward.Moving iron core 1 is connected into one with static iron core 3 outer coating plunger tubes 2 and with valve body 16 extruding.Braking liquid passage 7 in the valve seat 6 is connected with master cylinder braking liquid import 10 through cutoff port 9.

When routine was moved, because the existence of retracing spring 4, the valve port 17 on the valve seat 6 was what to separate with valve rod 18, and this moment, the master cylinder brake-pressure was more than or equal to a minute pump pressure; When brake off, because the effect of cutoff port 9, check valve ball 12 is opened under action of pressure, and braking liquid refluxes, and reduces rapidly and divides pump pressure, until consistent with master cylinder pressure.

When ABS works, under the electromagnetic force effect, valve rod 18 servo-actuated iron cores 1 move down, valve port 17 and valve rod 18 closures on the valve seat 6, normally closed vacuum solenoid valve is opened, and the braking liquid in the wheel cylinder flows into energy storage and backwash pump by normally closed vacuum solenoid valve interface 5 by outlet valve, and the brake-pressure in the brake cylinder reduces, backwash pump work, braking liquid is sent master cylinder back to.

Claims

1, a kind of anti-block braking system of car is often opened boost electromagnetic valve, comprise valve body (16), place the valve seat (6) of band valve (17) in the valve body (16), it is characterized in that valve seat (6) connects for extruding with valve body (16), valve body (16) both sides are respectively equipped with the normally closed vacuum solenoid valve interface (5) and the brake cylinder interface (15) of band filter screen (14); The top of described valve body (16) is provided with static iron core (3), and static iron core (3) top is provided with the moving iron core (1) of band valve rod (18) and retracing spring (4), and valve rod (18) passes static iron core (3) vertically downward; The outside, described valve body (16) lower end is provided with lower end filter screen (8); Offer the braking liquid passage (7) that is connected with master cylinder braking liquid import (10) in the described valve seat (6).

2, often open boost electromagnetic valve by the described anti-block braking system of car of claim 1, it is characterized in that described moving iron core (1) upper end also is provided with dolioform buffering knot (19).

3, often open boost electromagnetic valve by the described anti-block braking system of car of claim 1, it is characterized in that being connected into one after described valve rod (18) and moving iron core (1) adopt riveted joint.

4, often open boost electromagnetic valve by claim 1 or 2 described anti-block braking system of car, it is characterized in that also coating outside described moving iron core (1) and the static iron core (3) plunger tube (2) and be connected into one with valve body (16) extruding.

5, often open boost electromagnetic valve by claim 1 or 3 described anti-block braking system of car, it is characterized in that described brake cylinder connects the check valve passage (13) that also is provided with band check valve ball (12) between (15) and valve body (16) lower end, valve body (16) lower end also is provided with the check valve catch (11) of band cutoff port (9).