Gkn Automotive Ag

Gkn Driveline International Gmbh

Thomas Schmidt

Joachim Wette

Markus Deisinger

Herbert Konegen

Thomas Schafferus

Hans Schreiber

Ralf Schumacher

Thorsten Scholtz

A boot is disclosed having a first attachment region which is assigned to a joint, and a second attachment region which is assigned to a shaft. The boot has a plurality of folds, including a first fold region with at least two folds with a diameter that decreases in the direction of the second attachment region and at least one revolving, separating element which is arranged in an annular fold root between two folds.

Boot

A convoluted boot for sealing an annular gap between two parts which are connected to one another in a rotationally fast way, which can be articulated relative to one another and which are axially displaceable relative to one another, especially of a constant velocity plunging joint, consisting of includes a low-strain polymer hard material having a first larger collar () to be secured to a first component, a second smaller collar () to be secured to a second component and a plurality of annular fold units which extend between the first collar and the second collar and which, in the form of the outer folds consisting of have two annular flanks (), and form a fold peak () between two fold valleys (). In a first group (A) of at least three annular folds with a connection to the first collarannular folds, the diameters of the fold peaks () and fold valleys () decrease in the direction from the first collar to the second collar. In a second group (B) of annular folds with a connection to the second collarof at least one fold, the diameters of the fold valleys and, optionally, of the fold peaks () are constant. The ratio of the diameter (D) of the fold peak () of the largest annular fold (A) of the first group (A) to the diameter (D) of the second collar () is greater than or equal to 2.5.

Bellows for sliding constant velocity joints

The invention relates to an impregnating agent for a convoluted boot consisting of a thermplastic or elastomer material and used for covering the chamber of a joint, especially a rotating joint subjected to large articulation angles, which joint chamber is filled with a lubricant, said convoluted boot comprising a plurality of folds and two end collars, with the surfaces of the convoluted boot wall contacting one another when the joint is subjected to large articulation angles. It is the object of the invention to reduce the wear and eliminate squeaking symptoms of convoluted boots treated with the inventive impregnating agent. In accordance with the invention, the objective is achieved in that the impregnating agent contains a carrier fluid, an oil dissolved in the carrier fluid and having a molecular weight of >200, and a wetting agent which is soluble in oil and which reduces the surface tension of the oil.

Impregnated convoluted boot

Bellows with impregnation

Growing community of inventors

Siegburg, Germany

Thomas Schmidt