CN2245014Y

CN2245014Y - Brake valve

Info

Publication number: CN2245014Y
Application number: CN 96205151
Authority: CN
Inventors: 翟绪海; 代书唐
Original assignee: AUTOMOBILE BRAKE ACCESSORY FACTORY OF BEIJING
Current assignee: AUTOMOBILE BRAKE ACCESSORY FACTORY OF BEIJING
Priority date: 1996-03-13
Filing date: 1996-03-13
Publication date: 1997-01-15
Anticipated expiration: 2006-03-13

Abstract

The utility model discloses a brake valve. The housing of the utility model is designed into an integral structure, a return spring is arranged in the housing, the upper part of the return spring is provided with a core rod component, a guiding sleeve of the core rod component is provided with a balancing spring whose upper end is provided with a tappet, the upper end of tappet is arranged in an upper screw plug, and the screw plug is arranged on the upper end of the housing; the return spring is arranged between a clamp ring of the core rod component and a vertical dividing partition of the housing, an air inlet valve is arranged on the lower part of the housing, and an air inlet spring is arranged between the air inlet valve and a lower screw plug. The utility model has the advantages of integral structure of the housing, small size and light weight, besides, the utility model adopts a leather cup to replace a rubber membrane structure, so the performance is raised. The utility model is suitable for tractors and automobiles.

Description

A kind of brake activation valve

The utility model relates to a kind of brake activation valve, is applicable to automobile and trac..

The present brake activation valve that generally uses, be two sections or three stage structure, the structure of two sectional type brake activation valve is made up of upper shell and lower house, and the flange of two housings assembles with Bolt Connection is fastening, its inner core bar assembly, be epithelium formula hermetically-sealed construction, this type brake activation valve, volume is big, and is heavier, high material consumption, and yielding, upper and lower casing processing request precision height, it is inner to be that the epithelium formula seals, the damage of epithelium fatiguability, easily produce permeation gas leakage, in case the epithelium breakage, then complete machine can't be worked, lose function, service life is shorter.

The purpose of this utility model is for overcoming the brake activation valve that above-mentioned weak point designs a kind of unitized housing, cup leather packing; Volume is little, and is in light weight, reduced processing capacity, and sealing and dependable performance.

The utility model content, the braking valve housing is designed to integral structure, pull back spring is equipped with at the housing middle part, pull back spring top is installed with core bar assembly (assembly), in the orienting sleeve on the core bar assembly balance spring is housed, balance spring top dress tappet, tappet is loaded in the plug screw, and last plug screw is loaded on the upper end of housing, installs pull back spring between the clamping ring of core bar assembly and housing median septum, air intake valve is loaded on lower housing portion, installing air inlet spring between air intake valve and the following plug screw, this spring-loaded is in following plug screw, and following plug screw is loaded on the housing lower end, be hinged with torque arm on the support on housing top, torque arm is provided with adjustable bolt and caging bolt; The housing left side is provided with stoplight stop lamp, and the housing right side is provided with the deflation hole interface; In the rotating shaft mounting hole of housing upper bracket nylon jacket is housed, changes to alleviate wearing and tearing and to be convenient to; Tappet top is provided with dust boot; The base plate of housing is provided with four screw mounting holes, has higher Joint strenght after making assembling.

The utility model advantage, the braking valve housing is designed to single-piece, has reduced number of parts and processing capacity, and volume is little, and is in light weight; Replace original epithelium structure with leather cup, simplified assembly technology, improved performance, prolonged service life.

Description of drawings:

Fig. 1 is the utility model (cut-away view).

Fig. 2 is the left side view of Fig. 1.

Fig. 3 is the front view (analysing and observe) of housing.

Fig. 4 is the left side view of Fig. 3.

Fig. 5 is the birds-eye view of Fig. 3.

Fig. 6 is the D-D cutaway view.

Fig. 7 is a core bar assembly cutaway view.

Below in conjunction with the preferred embodiment of description of drawings the utility model, design has inlet chamber (A chamber) and discharge chamber (B chamber) and centre pilot hole in the housing 1, in the discharge chamber of housing 1, the pull back spring 3 of at first packing into, core bar assembly 2 small ends penetrate centre pilot hole in pull back spring 3 internal diameters and the housing 1, be pressed on pull back spring 3 end faces, reinstall balance spring 4, be pressed on the core bar assembly 2, assemble tappet 5 then, be pressed on the balance spring 4, use plug screw 6 again, be inserted in tappet 5 small ends, and screw in the housing 1 discharge chamber end face internal thread hole, screw and be assembled into the exhaust work chamber. in the inlet chamber of housing 1, the air intake valve 13 of at first packing into, air inlet spring 14 is pressed on the air intake valve 13, is inserted in down plug screw 16 outside thread places with tightening seal washer 15 again, and screws in housing 1 inlet chamber end face negative thread place jointly, screw and be assembled into the air inlet epitrochoidal chamber, in the discharge chamber tip exterior of unitized housing 1, design has the torque arm support, studs with nylon jacket 18 in the bracket holes, on support, assemble torque arm 8 with bearing pin 7, and in torque arm 8, assemble adjustable bolt 9 and caging bolt 10, and in the middle part, bottom of housing 1 fixing screw 11 is housed, in housing 1 discharge chamber left side stoplight stop lamp assembly 17 is housed.The right side design has deflation hole interface (shown in Figure 2 as Fig. 1); Dust boot 12 is housed on the tappet.Earlier O-ring seal 2.5 being inserted in core bar 2.4 left side small end to location during assembling core bar assembly locates, the orienting sleeve 2.3 of packing into then, be pressed on the O-ring seal 2.5, reinstall leather cup 2.1, be pressed on orienting sleeve 2.3 end faces, the clamping ring 2.2 of packing at last is pressed on the leather cup 2.1 interior resonator end surfaces, usefulness nut 2.6 screws on the core bars 2.4 left end outside threads again, screws to assemble the core bar assembly.

The brake activation valve principle of work is as follows:

When non-braking mode, A chamber (inlet chamber) and B chamber (discharge chamber) are because air inlet valve 13 is pressed on induction opening seal place, A chamber in the housing 1 by air inlet spring 14, make A chamber and B chamber obstructed each other (as shown in Figure 1), at this moment, pressurized air is logical less than the drag air chamber, therefore, can not promote brake toggle and rotate, so do not produce drag.

When braking mode, chaufeur steps stretcher, drive torque arm 8, depress adjustable bolt 9, promote tappet 5, compression balance spring 4, pull back spring 3, core bar assembly 2 is moved down, push air intake valve 13 open, the A chamber is communicated with the B chamber, pressurized air by the air pump generation, enter the B chamber from the A chamber, enter into compressed air brake cylinder by B chamber side exhausr port and pipeline, the compressed air brake cylinder inner push-rod is pushed out, turning stopper cam drag, meanwhile, B chamber opposite side stoplight stop lamp assembly is also stressed, makes circuit connection in the stoplight stop lamp assembly, brake is stoplight stop lamp bright (red light) simultaneously, (shown in Figure 2 as Fig. 1)

When the brake off state, chaufeur unclamps stretcher, and torque arm 8, core bar assembly 2 are under the effect of pull back spring 3, balance spring 4, set back, simultaneously, the high pressure gas of compressed air brake cylinder return the B chamber by pipeline, and by the designed quantitative gap location of core bar assembly 2 and air intake valve 13, enter into core bar 2.4 inner chambers,, thereby removed drag by the housing bottom exhaust to atmosphere, stoplight stop lamp is outage simultaneously also, (red light goes out).

Housing 1 profile is the circular pipe type integral structure, is provided with torque arm support 1.1 at a side roof part, to support torque arm, studs with nylon jacket in the bracket holes 1.2, in both sides, housing middle and lower part, the interface 1.3 and the deflation hole interface 1.4 of stoplight stop lamp assembly 17 is installed.Median septum 1.6 is divided into A, B two chambeies with valve body, and middle design has the guiding circular hole, in the design of A chamber side the guide ledges 1.5 of six air intake valves 13 is arranged to improve centering precision, and is crooked to prevent air intake valve 13, can increase suction quantity (as shown in Figure 6) simultaneously

Core bar assembly 2 of the present utility model is assembled by core bar 2.4, orienting sleeve 2.3, clamping ring 2.2 and leather cup 2.1, and this is simple in structure, and good seal performance is not easy to wear, long service life.(as shown in Figure 7).The base plate 1.7 of housing is provided with four screwing mounting holes, to increase its Joint strenght.

The profile of brake activation valve is one-piece construction, and is elegant in appearance, and volume is little, in light weight, but economical with materials, and processing capacity is little, and assembling is easily, deceleration and stopping performance is good, and adapter plate 1.7 is trapezoidal four screw mounting holes, the stability of which is provided with, commonality is good, improved the dustproof effect of discharge chamber, dependable performance, long service life wide accommodation, have good social benefit, the most suitable large tractor and automobile single tube road trailer use.

Claims

1. brake activation valve that comprises housing, torque arm, air intake valve and spring is characterized in that: brake activation valve is by housing, air intake valve, tappet, torque arm, spring, plug screw and comprise that orienting sleeve, leather cup core bar assembly form;

A. housing is an integral structure

B. pull back spring is equipped with at the housing middle part, and pull back spring top cored bar assembly is adorned balance spring in the orienting sleeve of core bar assembly, balance spring upper end dress tappet, and the upper end of tappet is loaded in the plug screw, and last plug screw is loaded on the housing upper end; Between the clamping ring of core bar assembly and the median septum of housing pull back spring is installed, air intake valve is loaded on lower housing portion, is provided with the air inlet spring between air intake valve and the following plug screw;

C. on the support of housing upside torque arm is housed, torque arm is provided with adjustable bolt and caging bolt;

D. the housing left side is provided with stoplight stop lamp, and the exhausr port interface is established on the housing right side.

2, brake activation valve as claimed in claim 1 is characterized in that: be provided with removable nylon jacket in the shaft hole of housing upper bracket.

3, brake activation valve as claimed in claim 1 is characterized in that: tappet top is provided with dust boot.

4, brake activation valve as claimed in claim 1 is characterized in that: housing is provided with four screw connecting holes.