CN2433145Y

CN2433145Y - Vacuum booster without empty run

Info

Publication number: CN2433145Y
Application number: CN 00212615
Authority: CN
Inventors: 赵凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-07-14
Filing date: 2000-07-14
Publication date: 2001-06-06
Anticipated expiration: 2010-07-14

Abstract

The utility model provides a vacuum booster without empty run, which comprises parts for marking positions, an input force push rod, a piston body, a booster shell, etc. The utility model is characterized in that one part which is used for marking positions is additionally arranged on the input force push rod, and the position of the part can be adjusted. The sensitivity of the booster, the braking efficiency and the running safety are improved by eliminating the empty run of the booster.

Description

A kind of vacuum booster of no-idle running

The utility model belongs to a kind of automobile component.

The idle travel of the vacuum booster that is adopted on car brake and the power-transfer clutch is all bigger at present, the size of idle travel mainly is to be caused to the distance the vacuum valve seat by control cock, it is located by locking plate and realizes, bigger idle travel can reduce the sensitivity and the brake efficiency of servo-unit, has also reduced traveling security simultaneously.

The purpose of this utility model provides a kind of vacuum booster of no-idle running, by improving structure design, has eliminated the idle travel of servo-unit.

The purpose of this utility model is that following mode realizes, the part that comprises a mark position, require the input force push rod pull back spring and the control valve spring of input force push rod assembly will satisfy certain technical requirements simultaneously, it is characterized in that on servo-unit input force push rod, adding the part of a position adjustable.

Advantage of the present utility model by having eliminated the idle travel of servo-unit, improves sensitivity and the brake efficiency and the traveling security of servo-unit.

Below in conjunction with accompanying drawing the utility model is described further.

Fig. 1 is the structural representation of utility model.

1. the part 3. piston bodies 4. servo-unit housings of input force push rod 2. mark positions

Fig. 2 is the input force push rod assembly of superposing type

1. air valve rod 2. control cock leather cups 3. control valve springs 4. control cock decks 5. input force push rod pull back springs 6. input force push rods

Fig. 3 is the input force push rod assembly of combined type

According to shown in Figure 1, on servo-unit input force push rod, add the part of a position adjustable, when the manufacturer of servo-unit assembles, after the check sealing is qualified, degree of vacuum is raised to-during 0.08MPA-0.1MPA, make input force push rod assembly and piston body be inhaled in the vacuum booster automatically, adjustment marks position part arrives and the tangent position of piston body port, the part of mark position is retracted into the state of nature of locking plate locking with the input force push rod after servo-unit cancellation vacuum, notice that dust boot does not cover, other operation as before.In car load manufacturer or chassis manufacturer, when the entrucking of servo-unit assembly, earlier the servo-unit assembly is fixed on the running-board bracket and is installed on the foot pedal lever with servo-unit adjustment fork, regulate the input force push rod then the sign part is in and the lucky contacted position of piston body port, again on the dust boot cover.Particularly point out, the method has following technical requirements to the input force push rod assembly:

For the input force push rod assembly (Fig. 2) of superposing type,

F returns-F control＜Po*A* η and: F returns-F control＞P*A

For the input force push rod assembly (Fig. 3) of combined type,

F returns＜Po ≠ A ≠ η and: F returns＞P ≠ AF returns and be input force push rod pull back spring work drag, the F control is the work drag of control valve spring, the degree of vacuum of the vacuum booster ante-chamber when P is the adjustment marks part, its value gets-and 0.08MPA is between-the 0.1MPA, Po is the degree of vacuum of vacuum booster ante-chamber under the driving states, and its value is-0.0667MPA that A is the sectional area of piston body shank internal diameter, η is an efficient, and its value is between 90% to 95%.

Claims

1. the vacuum booster of a no-idle running comprises the part of mark position, the input force push rod, and piston body, servo-unit housings etc. is characterized in that: the part that adds the mark position of a position adjustable on servo-unit input force push rod.