DE202008001466U1 - Control piston as elastomeric thermoset compound - Google Patents

Abstract

Control piston consisting of a support body (1) and an elastomer component (2).
wherein the elastomer component of the stop damping, noise reduction and sealing at the end stop of the piston is used, characterized in that the elements are directly adhesively bonded together.

Description

1. State of the art

hydraulic Shock absorber will be partially constructed in several stages, in order to adapt the damping properties to the load conditions.

The therefor alternately activated bypasses be over switched a so-called control piston.

These Control spools work spring or magnetic force assisted, or work over the prevailing pressure difference. Depending on the functional principle exists there are different designs. A design consists of a metal bush, to the an elastomeric body over a Adhesive system is vulcanized. A direct liability between the support body and the elastomer could not be realized so far.

2. invention

Instead of of the metal body a thermoset or thermoplastic body is used without adhesion promoter makes a connection with the elastomer.

• – die Kontaktoberflächen für eine optimale Haftung zu gestalten.
• – den duroplastischen (thermoplstischen) Werkstoff mit Elastomerbestandteilen anzureichern
• – das Elastomer so zu modifizieren, dass eine entsprechende Haftung erfolgt.

In order to ensure sufficient adhesion between the components, the materials must be modified. The invention includes three options:

• - To design the contact surfaces for optimal adhesion.
• - To enrich the thermoset (thermoplastic) material with elastomer components
• - To modify the elastomer so that a corresponding adhesion occurs.

3. Advantages of the invention

Of the body (eg socket) can be injection molded, which in contrast to The mechanical processing of the metal body more creative freedom allows, and at high volumes cost-effective is to implement.

The Connection between the materials can take place without adhesion promoter, what more creative possibilities leads. This makes the manufacturing process safer and less expensive and more ecological.

The recyclability is significantly improved because the bonding agent z. Z. not again can be separated from the base materials.

4. Commercial benefit of invention

since 2004 become in the passenger car area first, over control piston self-regulating Shock absorber used. In the meantime, further series are being equipped with this technology.

It is foreseeable that in the future also in other areas (agricultural machinery, rail vehicles, machinery ......) this technique is used. The invention can therefore directly be used in running series.

 A

presentation of the control piston as Einzelbautei

1

elastomer component

 2

direct Adhesion between the support body and elastomer component

 3

supporting body

B

presentation the operation of the control piston

 4

throttle

 5

bypass

6

piston rod

 7

damper tube

 8th

working piston

9

oil chamber

10

spool

Claims (6)

Control piston consisting of a support body ( 1 ) and an elastomer component ( 2 ). wherein the elastomer component of the stop damping, noise reduction and sealing at the end stop of the piston is used, characterized in that the elements are directly adhesively bonded together. Control piston according to claim 1, characterized in that that the supporting body made of a modified, thermosetting material that ensures a direct bond with the elastomer. Control piston according to claim 1, characterized in that that the elastomer is modified so that a direct adhesion to selected Duroplast material possible is. Control piston according to claims 1-3, characterized the elastomer is sprayed (vulcanised) directly onto the thermoset carrier becomes. Control piston according to claims 1-3, characterized that the thermoset is sprayed directly onto the elastomer body. Control piston according to claim 1-5, characterized ge indicates that the support body was made of a thermoplastic base material.