Service brake chamber manufactured with composite pressure housing and non-pressure housing and a connection method of this chamber

Abstract

This invention is related to a service brake chamber manufactured with a composite pressure housing and a non-pressure housing, used in the air brake system of heavy vehicles such as trucks, trailers lorries and buses and a connection method of pressure housing and non-pressure housing forms this chamber.

Claims

1. A method for realizing a service brake chamber used in an air brake system of heavy vehicles, in which the chamber is formed by connecting a pressure housing and a non-pressure housing, wherein the method connects the pressure housing and the non-pressure housing of the service brake chamber, wherein the pressure housing and the non-pressure housing are made by composite material composed of non-metallic polymeric matrices, reinforced with glass fibers or carbon fibers and produced by a plastic injection molding process, wherein the method comprises the following steps: compressing the pressure housing, the non-pressure housing and a diaphragm by means of a press machine; forming keyways by aligning halves of recesses of the pressure housing with other halves of the respective recesses of the non-pressure housing by compressing the diaphragm to provide sealing; forming at least six wedge mounting spaces during the step of compressing, wherein the wedge mounting spaces are required for an insertion of wedges in the keyways in a radial direction, wherein the wedge mounting spaces are formed simultaneously with the keyways; placing the wedges into the wedge mounting spaces and driving the wedges to into the keyways in the radial direction.

2. The method according to claim 1, further comprising forming at least six keyways.

3. The method according to claim 1, wherein the keyways are blind to prevent a displacement of the wedges from the keyways.

4. The method according to claim 1, wherein the wedge mounting spaces are filled by silicone or a resin based filler material after an assembly of the wedges.

5. A service brake chamber manufactured according to the method of claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The figures that have been prepared in order to further explain the service brake chamber manufactured with composite pressure housing a non-pressure housing and the connection method of this chamber developed according to the present invention illustrates the following:

(2) FIG. 1 is the sectional view of the service brake chamber subject to the invention.

(3) FIG. 2 is the detailed view of the connection method subject too the invention.

(4) The aspects, sections, parts shown in the figures drawn in order to further explain the service brake chamber manufactured with composite pressure housing a non-pressure housing and the connection method of this chamber subject to the invention have each been numbered and the references of these numbers have been listed below. 1. Pressure housing 2. Non-pressure housing 3. Keyways 4. Wedge 5. Diaphragm 6. Connection region 8. Wedge mounting space 9. Service brake chamber

DETAILED DESCRIPTION OF THE INVENTION

(5) Invention subject to the application is a service brake chamber is used if the vehicle is desired to be stopped or slowed down and functions when the foot brake is actuated, used in the air brake system of heavy vehicles (bus, lorries trucks, trailers, etc.) and a connection method between pressure housing (1) and non-pressure housing (2).

(6) Pressure housing (1) and non-pressure housing (2) of the service brake chamber (9) subject to the invention, are made by composite material which has non-metallic polymeric matrix, reinforced with glass fiber or carbon fiber and produced by plastic injection molding process.

(7) The thickness of the pressure (1) and non-pressure housing (2) is more than the pressure and non-pressure housing produced by the steel sheet in the known state of the art.

(8) Sealing must be provided in the connection region (6) in the process which connection between pressure (1) and non-pressure housing (2) is done also the diaphragm (5) is between of them.

(9) Sealing is provided by compressing the diaphragm (5) by pressing pressure (1) and non-pressure housings (2) to each other by press machine and fixing pressure (1) and non-pressure housings (2) to each other completely.

(10) This fixing process in the known state of the art, is carried out by bending skirt of one of the housings onto the other one of housing, or carried out by using clamp.

(11) However, these methods are not suitable because they can damage the pressure (1) and non-pressure housings (2) made front composite materials.

(12) The connection method subject to the invention, pressure housing (1), non-pressure housing (2) and diaphragm (5) between them compressed at rates to provide sealing of the diaphragm (5) by means of press machine to connect composite pressure housing (1) and non-pressure housing (2) and diaphragm (5) between them without housing damages as sealing is provided.

(13) Keyways (3) are occur when half of recesses of pressure housing (1) and the other half of recesses of non-pressure housings (2), aligned by compressing diaphragm (5) at rates to provide sealing. The formed keyways (3) are at least 6 pieces. At least 6 wedge mounting space (8) required for the insertion of the wedges (4) in the keyway (3) in the radial direction is formed during the compression process enables the occurrence of the keyways. Connection process is terminated after the wedges (4) are placed into the wedge mounting spaces (8) and are driven to the keyways (3) in the radial direction.

(14) Connection between pressure (1) and non-pressure housing (2) is fixed by wedges (4) enter the keyways (3) and sealing is provided because diaphragm (5) is compressed at the desired rate. Keyways (3) are designed as blind to prevent displacement of the wedges (4) from keyways (3). Additionally, the dislocation of the wedged (4) is prevented under effects caused by vibration or other effects caused by operation conditions, by means of filling the wedge mounting spaces (8) by silicon or similar material after the assembly of the wedges (4).