CN201245152Y

CN201245152Y - Internal respiration piston type spring brake air chamber

Info

Publication number: CN201245152Y
Application number: CNU2008201220545U
Authority: CN
Inventors: 陈晓飞
Original assignee: 张维存
Priority date: 2008-07-30
Filing date: 2008-07-30
Publication date: 2009-05-27
Anticipated expiration: 2018-07-30

Abstract

The utility model relates to an internal respiration piston type spring brake air chamber, which comprises a rear shell, a parking spring, an energy-storing piston, an air chamber flange, a piston shaft component and a front end cover component. The prior machined threaded enclosing cover is substituted by an end cover and a supporting plate which are made by a high-efficiency stamping method; the prior valve core, the prior spring and the prior O-shaped seal ring are substituted by a rubber valve plate; and the prior valve body and the prior washer are substituted by a valve seat which is made by the high-efficiency stamping method. In terms of assembly, the prior assembly method, in which the washer, the valve body, the spring, the valve core, the O-shaped seal ring and the enclosing cover are manually assembled in order and then screwed, is changed into a mechanical rolling method, in which after the end cover, the supporting plate, the rubber valve plate and the valve seat are assembled in a rolling way to form a component, an O-shaped ring is assembled on the component, which is then manually gently pressed into the bore of a threadless piston shaft. The internal respiration piston type spring brake air chamber has the advantages of reasonable structure, high production efficiency, easy assembly, low material cost, easily controlled precision and stable performance.

Description

Internal Respiration Piston Spring Brake Chamber

Technical field

The utility model relates to a kind of Automobile air brake equipment, relates in particular to a kind of Internal Respiration Piston Spring Brake Chamber.

Background technology

Internal Respiration Piston Spring Brake Chamber on market is made up of parts such as back cover, Parking spring, energy storage piston, air chamber flange, the axis of the piston assembly, front end cover assemblies at present, the Parking spring is located between back cover and the energy storage piston, the energy storage piston is sealed and matched as the slip base of Parking spring and with back cover, the axis of the piston pass that flange is fixedly connected on the energy storage piston and with the flange seal running-fit, energy storage piston and flange constitute the variable air space of sealing charging volume, and energy storage piston and back cover constitute the air-capacitor chamber of sealing, variable volume equally simultaneously.Check valve assembly by the axis of the piston front end when brake off of air chamber is Parking chamber A inflation is derived air importing ante-chamber (brake chamber) back of back cavity C (back pressure cavity) by the pipeline of ante-chamber B, when ante-chamber B when inflation braking, the check valve assembly of the axis of the piston front end prevents that by sealing the pressurized air of ante-chamber B from revealing to back cavity C (back pressure cavity).But owing to the part that check valve assembly (Fig. 1) is used is many, more complicated and accuracy requirement are very high, and be most of by machine up or injection moulding gained, and material therefor and tooling cost are high produces, and production efficiency is low, and assembling is difficult.

Summary of the invention

The purpose of this utility model is to overcome the defective of prior art, and the Internal Respiration Piston Spring Brake Chamber of a kind of more reasonable structure, long service life is provided.

For achieving the above object, the utility model adopts a kind of Internal Respiration Piston Spring Brake Chamber, comprise back cover, the Parking spring, the energy storage piston, the air chamber flange, the axis of the piston assembly, the front end cover assembly, wherein the Parking spring is located between back cover and the energy storage piston, the energy storage piston is sealed and matched as the slip base of Parking spring and with back cover, the axis of the piston pass that the air chamber flange is fixedly connected on the energy storage piston and with air chamber flange seal running-fit, energy storage piston and air chamber flange constitute the variable air space of sealing charging volume, energy storage piston and back cover constitute sealing, the air-capacitor chamber of variable volume, the axis of the piston assembly includes end cap, piston central siphon and the check valve assembly that is positioned at the piston central siphon, end cap is fixed on the port of piston central siphon, on the axis of the piston tube wall between end cap and the check valve assembly, be provided with deflation hole, the piston central siphon is provided with the through hole that is communicated with the air-capacitor chamber at the other end that end cap is set, end cap in the axis of the piston assembly is a punch components, its end face is dome shape, both sides form the feet that extends, end cap is fixedly installed in the piston central siphon by the feet on it, deflation hole on the end cap on the corresponding the axis of the piston tube wall is provided with pore, the check valve assembly overall fixed is in end cap, comprise bracing frame, valve block, valve seat, valve seat is fixedly installed in the end cap, center at valve seat offers through hole, between valve seat and stay bearing plate, be provided with valve block and bracing frame successively, valve block is a rubber components, the feet of itself and end cap is sealed and matched, on the valve block near the middle part of valve seat one side form with valve seat on through hole constitute the salable boss that cooperates, the both sides of the boss on valve block offer air extractor vent, on the bracing frame corresponding end cap one end in be formed centrally big opening, the other end and valve block close neighbour, bracing frame is a punch components, forms and big opening near end cap one side on bracing frame.

This practicality further is set to the inboard cavity that forms of front end of end cap, and an end face is the stay bearing plate of dome shape to be fixed in this cavity.

This practicality further is set to be provided with seal ring between the feet of end cap and the piston central siphon inner tubal wall again.

The utility model is used the threaded capping of former cause machine up by punching press means efficiently instead is obtained end cap and stay bearing plate, original spool, spring and O-ring seals used instead by rubber valve plate substitute, use original valve body, packing ring instead obtain valve seat and substitute by punching press means efficiently.Aspect assembling, original packing ring, valve body, O RunddichtringO, spring, spool, O-ring seals, capping are screwed in assembling by the back of manually packing into successively change and load onto O shape ring-type again by manually gently pressing fit in the threadless the axis of the piston endoporus after mode by mechanical stitch is assembled into assembly with end cap, stay bearing plate, rubber valve plate, valve seat roll extrusion.By the improvement of above-mentioned two aspects, provide a kind of rational in infrastructure, production efficiency is high, be easy to assemble, lower cost for material, precision are easy to control, stable performance, and met or exceeded the product design Internal Respiration Piston Spring Brake Chamber in service life through performance, life test.

Description of drawings

Fig. 1 is the utility model background technology the axis of the piston unit construction scheme drawing.

Fig. 2 is the utility model example structure scheme drawing.

Fig. 3 is that the F of Fig. 2 is to enlarged drawing.

The specific embodiment

As Fig. 2, shown in 3, the utility model specific embodiment is a kind of Internal Respiration Piston Spring Brake Chamber, comprise back cover 1, Parking spring 2, energy storage piston 3, air chamber flange 4, the axis of the piston assembly 5, the front end cover assembly, wherein Parking spring 2 is located between back cover 1 and the energy storage piston 3, energy storage piston 3 is sealed and matched as the slip base of Parking spring 2 and with back cover 1, the axis of the piston 51 pass that air chamber flange 4 is fixedly connected on the energy storage piston 3 and with air chamber flange 4 sealing running-fits, energy storage piston 3 constitutes the variable air space of sealing charging volume with air chamber flange 4, energy storage piston 3 constitutes sealing with back cover 1, the air-capacitor chamber of variable volume, the axis of the piston assembly 5 includes end cap 51, piston central siphon 52 and the check valve assembly 53 that is positioned at piston central siphon 52, end cap 51 is fixed on the port of piston central siphon 52, on piston central siphon 52 tube walls between end cap 51 and the check valve assembly 53, be provided with deflation hole 521, piston central siphon 52 is provided with the through hole that is communicated with the air-capacitor chamber at the other end that end cap 51 is set, 51 end caps are punch components, its end face 511 is dome shape, both sides form the feet 512 that extends, end cap 51 is fixedly installed in piston central siphon 52 pipes by the feet on it 512, be provided with O RunddichtringO 513 between feet 512 and piston central siphon 52 inner tubal walls, deflation hole 521 on the end cap 51 on corresponding piston central siphon 52 tube walls is provided with pore 514, the inboard cavity 515 that forms of the front end of end cap 51, the stay bearing plate 54 that one end face is dome shape is fixed in the cavity 515 of end cap 51, check valve assembly 53 overall fixed are in end cap 51, comprise bracing frame 531, valve block 532, valve seat 533, valve seat 533 is a punch components, be fixedly installed in the end cap 51, offer through hole 5331 at the center of valve seat 533, between valve seat 5331 and stay bearing plate 54, be provided with valve block 532 and bracing frame 531 successively, valve block 532 is a rubber components, the feet 512 of itself and end cap 51 is sealed and matched, on the valve block 532 near the middle part of valve seat 533 1 sides form with valve seat 533 on the salable boss that cooperates 5321 of through hole 5331 formations, the both sides of the boss 5321 on valve block 532 offer air extractor vent 5322, bracing frame 531 is a punch components, on it corresponding end cap 51 1 ends in be formed centrally big opening 5311, the other end and valve block 532 close neighbours.

The utility model is used the threaded capping of former cause machine up by punching press means efficiently instead is obtained end cap 51 and stay bearing plate 54, original spool, spring and O-ring seals used instead by rubber valve plate 532 substitute, use original valve body, packing ring instead obtain valve seat 533 and substitute by punching press means efficiently.Aspect assembling, original packing ring, valve body, O RunddichtringO, spring, spool, O-ring seals, capping are screwed in assembling by the back of manually packing into successively change and load onto O-ring seals 513 again by manually gently pressing fit in threadless piston central siphon 52 endoporus after mode by mechanical stitch is assembled into assembly with end cap 51, stay bearing plate 531, rubber valve plate 532, valve seat 533 roll extrusion.By the improvement of above-mentioned two aspects, provide a kind of rational in infrastructure, production efficiency is high, be easy to assemble, lower cost for material, precision are easy to control, stable performance, and met or exceeded the product design Internal Respiration Piston Spring Brake Chamber in service life through performance, life test.

Claims

1, a kind of Internal Respiration Piston Spring Brake Chamber, comprise back cover, the Parking spring, the energy storage piston, the air chamber flange, the axis of the piston assembly, the front end cover assembly, wherein the Parking spring is located between back cover and the energy storage piston, the energy storage piston is sealed and matched as the slip base of Parking spring and with back cover, the axis of the piston pass that the air chamber flange is fixedly connected on the energy storage piston and with air chamber flange seal running-fit, energy storage piston and air chamber flange constitute the variable air space of sealing charging volume, energy storage piston and back cover constitute sealing, the air-capacitor chamber of variable volume, the axis of the piston assembly includes end cap, piston central siphon and the check valve assembly that is positioned at the piston central siphon, end cap is fixed on the port of piston central siphon, on the axis of the piston tube wall between end cap and the check valve assembly, be provided with deflation hole, the piston central siphon is provided with the through hole that is communicated with the air-capacitor chamber at the other end that end cap is set, it is characterized in that: the end cap in the described the axis of the piston assembly is a punch components, its end face is dome shape, both sides form the feet that extends, end cap is fixedly installed in the piston central siphon by the feet on it, deflation hole on the end cap on the corresponding the axis of the piston tube wall is provided with pore, the check valve assembly overall fixed is in end cap, comprise bracing frame, valve block, valve seat, valve seat is fixedly installed in the end cap, center at valve seat offers through hole, between valve seat and stay bearing plate, be provided with valve block and bracing frame successively, valve block is a rubber components, the feet of itself and end cap is sealed and matched, on the valve block near the middle part of valve seat one side form with valve seat on through hole constitute the salable boss that cooperates, the both sides of the boss on valve block offer air extractor vent, on the bracing frame corresponding end cap one end in be formed centrally big opening, the other end and valve block close neighbour, bracing frame is a punch components, forms and big opening near end cap one side on bracing frame.

2, Internal Respiration Piston Spring Brake Chamber according to claim 1 is characterized in that: the inboard cavity that forms of the front end of described end cap, an end face is the stay bearing plate of dome shape to be fixed in this cavity.

3, Internal Respiration Piston Spring Brake Chamber according to claim 1 and 2 is characterized in that: be provided with seal ring between the feet of described end cap and the piston central siphon inner tubal wall.