CN201895659U

CN201895659U - Vacuum booster

Info

Publication number: CN201895659U
Application number: CN201020625166XU
Authority: CN
Inventors: 韦秀喜; 潘金海; 青彩芸; 胡长安; 常洁
Original assignee: LIUZHOU CHANGHONG MACHINE MANUFACTURING Co Ltd
Current assignee: LIUZHOU CHANGHONG MACHINE MANUFACTURING Co Ltd
Priority date: 2010-11-25
Filing date: 2010-11-25
Publication date: 2011-07-13
Anticipated expiration: 2020-11-25

Abstract

A vacuum booster comprises a valve, a booster housing, a tray and a diaphragm. The tray and the diaphragm are combined into a diaphragm tray member, namely the diaphragm integrally wraps an extension portion of the tray through an interlayer of the front of the diaphragm. An inner connecting ring of the tray of the diaphragm tray member is fixedly connected with a base at the bottom of the valve, wherein the inner connecting ring of the tray is not wrapped by the interlayer of the diaphragm. An outer connecting ring of the diaphragm of the diaphragm tray member is pressed and fixedly connected with an upper housing and a lower housing of the booster. An inward turnup edge is arranged on the rim of the inner connecting ring without being wrapped by the interlayer of the diaphragm, and a sealing ring is arranged on an assembling portion where the turnup edge and the base of the bottom of the valve are fastened. The vacuum booster is compact in structure, few in assembling parts, low in manufacturing cost and stable in performance, high in coaxiality of the diaphragm and the tray, good in flexibility and safe and reliable, while the diaphragm is not easy to be scratched.

Description

A kind of vacuum booster

Technical field

The utility model relates to a kind of automotive component, particularly a kind of vacuum booster.

Background technology

Traditional vacuum booster is no matter be single-iris vacuum booster or two diaphragms or through vacuum booster, mostly its diaphragm and pallet are to separate, at first diaphragm support and valve body are riveted together during assembling, form valve body riveted spare, pack into diaphragm from the valve body front end then, utilize snap ring and back-up ring that the valve body base bottom is fixed and be pressed on to the interior adapter ring of diaphragm, the outer adapter ring of diaphragm is fixed on the servo-unit inner body wall.The vacuum booster of this structure has the following disadvantages: because diaphragm and diaphragm support are divided on the valve body, right alignment is relatively poor, causes vacuum booster to be prone to clamping stagnation, abnormal sound in the course of the work (1); (2) operation of fitting process and part are too much, and efficiency of assembling is lower; (3) diaphragm and diaphragm support servo-actuated are relatively poor, the easy scratch of diaphragm.

Summary of the invention

The purpose of this utility model is to provide a kind of simple in structure, easy for installation, stable performance, economical and practical vacuum booster, to overcome the existing above-mentioned deficiency of prior art.

The technical scheme that the utility model is taked is: a kind of vacuum booster, comprise valve body, servo-unit housing, pallet and diaphragm, described pallet and diaphragm are the diaphragm support member that is combined into one, be that diaphragm is integral pallet extension position parcel by its anterior interlayer with trays, the pallet of described diaphragm support member is not captiveed joint with the valve body bottom base by the interior adapter ring that the diaphragm interlayer wraps up, and lower house is fixed and is connected on the outer adapter ring of the diaphragm of diaphragm support member and the servo-unit.

Its further technical scheme is: have one to in-flanges on the interior adapter ring round edge that described pallet is not wrapped up by the diaphragm interlayer, the assembling position that flange and valve body bottom base interlock is provided with seal ring.

Described diaphragm adopts plastic material and pallet to be injection molded into one.

Because adopt technique scheme, a kind of vacuum booster of the utility model has following beneficial effect:

1, because its diaphragm of a kind of vacuum booster and the pallet of the utility model are integral type film tablet tray member, thereby the right alignment of diaphragm and pallet is guaranteed, the two servo-actuated is good, diaphragm is difficult for scratch, vacuum booster clamping stagnation, abnormal sound can not occur at working process, stable performance, safe and reliable.

2, because diaphragm and pallet are integral type film tablet tray member, the diaphragm support member is connected with lower house on the servo-unit with the valve body bottom base respectively with outer adapter ring by adapter ring in it, save snap ring and back-up ring, do not need to adopt back-up ring to be pressed into frock, both reduced assembly part, shorten time of setting up again, helped improving work efficiency, saved cost.

3, the pallet of traditional vacuum booster, diaphragm are assemblied in the valve body bottom respectively, make the valve body bottom long and thick and heavy, its diaphragm of a kind of vacuum booster of the utility model and pallet are integral type film tablet tray member, the extension position of pallet is wrapped in the interlayer of diaphragm, not only can optimize the pallet shape, simplify technology, and increase actv. power-assisted space, make servo-unit valve body bottom lengths shorten saving in material.

Be further described below in conjunction with the technical characterictic of drawings and Examples a kind of vacuum booster of the utility model.

Description of drawings

Fig. 1: a kind of vacuum booster structural representation of the utility model:

The A portion enlarged drawing of Fig. 2: Fig. 1;

The B portion enlarged drawing of Fig. 3: Fig. 1;

Fig. 4: diaphragm support element structure scheme drawing (analysing and observe);

Fig. 5: existing vacuum booster structural representation.

Among the figure:

The 1-valve body, 2-seal ring, 3-diaphragm support member, adapter ring in the 31-pallet, 311-, the 312-flange, the 32-diaphragm, the outer adapter ring of 321-, I-servo-unit housing, 4-servo-unit upper shell, 5-servo-unit lower house, 6-back-up ring, the 7-snap ring, the split type diaphragm of 8-, the split type pallet of 9-, C-riveting point.

The specific embodiment

A kind of vacuum booster, comprise valve body 1, servo-unit housing I, pallet 31 and diaphragm 32, described pallet 31 and the diaphragm support member 3 of diaphragm 32 for being combined into one, be that diaphragm is integral with the extension position parcel of pallet and with trays by its anterior interlayer, the pallet 31 of described diaphragm support member is not captiveed joint with valve body 1 bottom base by the interior adapter ring 311 that the diaphragm interlayer wraps up, and lower house is fixed and is connected on the outer adapter ring 321 of the diaphragm 32 of diaphragm support member and the servo-unit.

On the round edge of the interior adapter ring 311 that described pallet is not wrapped up by the diaphragm interlayer an inside flange 312 is arranged, the assembling position that flange and valve body bottom base interlock is provided with seal ring 2.

Described diaphragm 32 adopts plastic material and pallet 31 to be injection molded into one.

In the foregoing description, adapter ring 311 generally adopts riveted joint with being connected of valve body bottom base in the pallet, the outer adapter ring of diaphragm places between servo-unit upper shell 4 and the lower house 5, and last lower house is by screwing or rivet adapter ring outside the diaphragm support member 321 fixing (referring to Fig. 1).

Described pallet generally adopts the steel thin slice to make, and when utilizing that plastic cement is molded makes diaphragm, the diaphragm support of steel is fixed on the plastic cement mould, and it is in the plastic cement mould cavity by the rubber wrapping portion, through the diaphragm injection moulding, forms later-model diaphragm support integral structure.

During assembling, seal ring is entered on the valve body bottom base from the valve body front end sleeve, the diaphragm support member packs into from the valve body front end, and after utilizing frock clamp to compress, rivet at C point in position shown in Figure 1, after the riveted joint, valve body, diaphragm support member and seal ring are fixed into one, form structure shown in Figure 1.

The foregoing description is one of preferable embodiment of a kind of vacuum booster of the utility model, but its technical scheme is not restricted to the foregoing description, and the conversion of being done on the basis of all technical schemes in the application all belongs to the application's protection domain.

Claims

1. vacuum booster, comprise valve body, servo-unit housing, pallet and diaphragm, it is characterized in that: described pallet (31) and the diaphragm support member (3) of diaphragm (32) for being combined into one, be that diaphragm is integral with pallet extension position parcel and with trays by its anterior interlayer, the pallet of described diaphragm support member (31) is not captiveed joint with valve body (1) bottom base by the interior adapter ring (311) that the diaphragm interlayer wraps up, and lower house is fixed and is connected on the outer adapter ring (321) of the diaphragm of diaphragm support member (32) and the servo-unit.

2. a kind of vacuum booster according to claim 1, it is characterized in that: on the round edge of the interior adapter ring (311) that described pallet is not wrapped up by the diaphragm interlayer an inside flange (312) is arranged, the assembling position that flange and valve body bottom base interlock is provided with seal ring (2).

3. a kind of vacuum booster according to claim 1 and 2 is characterized in that: described diaphragm (32) adopts plastic material and pallet (31) to be injection molded into one.