Gkn Driveline International Gmbh

Gkn Automotive Ag

Gkn Automotive Gmbh

Kyodo Yushi Co., Ltd.

Joachim Wette

Markus Deisinger

Thomas Schafferus

Ralf Schumacher

Thomas Schmidt

Ludger Wenning

Herbert Konegen

Hans Schreiber

Andreas Gehrke

Maik Lehmann

Wolfgang Hildebrandt

Jisheng E

Daniela Ballas

Bernd Bender

Christoph Lindlahr

Achim Pfeifer

Winfried Busch

Frank Reher

Thorsten Scholtz

Andreas Berndt

Thorsten Stresewski

Karl-Heinz M&uuml;ller

Tomio Seki

Achim Schmeink

Tadaaki Konno

Tomohiko Yamaguchi

Bellows, for example, a roll bellows and a folding bellows, can be produced that can be used at higher temperatures such as those prevailing in modern articulated constructions, using a mixture comprising at least one thermoplastic elastomer selected from the group of copolysters with a hard segment and a soft segment, wherein in a first step the at least one thermoplastic elastomer is mixed with approximately 0.8 wt. % to approximately 5 wt. % triallyl isocyanurate, based on the total amount of the mixture; in a second step the bellows is produced; and in a third step, the bellows is exposed to an ionizing irradiation in a range from approximately 140 kGy to approximately 350 kGy.

Producing a bellows

A boot is provided with an improved sealing effect. The boot has a first and a second fastening region, and a pleated region between them, wherein the first fastening region comprises lobe regions and/or guide regions, and connecting regions and a connector seat region that has a connector seat region surface and an undersurface lying opposite it, wherein there is at least one inner groove in the lobe regions and/or in the guide regions, on the undersurface.

Bellows comprising at least one internal groove

A fastener, in particular for bellows, comprises a male end segment and a female end segment complementary to the male end segment. The fastener can be used to fasten bellows to joint housings and/or shafts, said fastener having improved closing behavior.

Fastener for bellows, having a male and a female end segment

A fastening means, in particular for a bellows, comprises a male end segment and a female end segment complementary to the male end segment. The fastening means can be used to fasten bellows to joint housings and/or shafts. The fastening means has an inner undercut region in order to provide an improved closing behavior of the fastening means.

Fastener having an inner undercut region

A rolling boot comprises a first fastening region for fastening the boot to a joint casing, a second fastening region for fastening the boot to a shaft, and a fold region between the first and the second fastening region with a first fold near to the first fastening region and a second fold near to the second fastening region. The boot further comprises, between the first fastening region and the first fold, a first transition region comprising a first flange neighboring the first fastening region with a bottom. A ratio between a first minimal diameter D, defined by the bottom of the first flange of the first transition region, and a second maximal diameter D, defined by the first fold, where both are viewed in a longitudinal section direction along the main axis, is between approximately 1:1.01 to approximately 1:1.25.

Rolling boot with transition region

A boot for joints, such as constant velocity joints, has a first attachment region and a fold region with a plurality of folds with peaks and roots and a transition area adjacent to the last fold arranged near said first attachment region. The transition area includes a connecting root between said last fold in the transition part, wherein at least part of said transition part is inclined towards said first attachment region, and wherein said transition part, in a cross-sectional view in a direction of a main axis of the boot, has a convex or an essentially planar shape.

Boot for joints, such as constant velocity joints, with a transition area

A boot for joints, such as constant velocity joints, has a first attachment region and a fold region with a plurality of folds with peaks and roots and a transition area adjacent to the last fold arranged near said first attachment region. The transition area comprises a connecting root between said last fold in the transition part, wherein at least part of said transition part is inclined towards said first attachment region.

A boot comprising a fold region and an attachment region is disclosed. The attachment region comprises an outside with at least two circumferential ribs extending from a base surface towards the outside and providing for a binder seat surface.

Boot comprising an attachment region with at least three circumferential outside ribs

A sealing sleeve () of the rolling boot type having a first larger, substantially cylindrical collar (), a second smaller, substantially cylindrical collar (), as a well as a wall portion () which is positioned between the collars () and which forms at least one axially open annular fold () with circumferentially distributed indentations () in the convex curvature of the axially open annular fold (), or with radial ribs () in the concave inner curvature of the axially open annular fold.

Reinforced rolling 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 a tripod joint assembly, suited for the driveline of motor vehicles. It includes an outer joint part, rollers and an inner joint part which is connected to a shaft in a rotationally fast way, with an annular gap being formed between the shaft and the outer joint part, as well as a convoluted boot for sealing the annular gap. The outer joint part comprises a wall whose outer contour, in cross-section, deviates from the circular shape and which comprises a radially outwardly directed, circumferentially extending bead. The convoluted boot comprises an adapter ring and a convoluted portion connected to the adapter ring, with the adapter ring, on its radial inside, comprising an annular circumferential recess and, in its cross-section, being suitable for being fitted on to the outer joint part. When the adapter ring is fitted on to the outer joint part, the bead of the outer joint part engages the circumferential recess of the adapter ring in order to provide axial security.

Tripod joint assembly

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

A rolling boot for sealing a universal joint, having a first collar with a larger diameter to be secured to the outer joint part of the universal joint and having a second collar with a smaller diameter to be secured to a shaft at the inner joint part of the universal joint, and having a semi-toroidal boot wall connecting the collars, wherein the rolling boot is an injection-moulded or blow-moulded product, the rolling boot consists of a thermo-plastic elastomer and the elastomer is irreversibly cross-linked up to a degree ranging between 15 and 85%.

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Hennef, Germany

Joachim Wette