Method of making a bearing structure and bearing so made

Details Method of making a bearing structure and bearing so made Method of making a bearing structure and bearing so made

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 27/06 (2006.01) B29D 33/00 (2010.01) B60G 7/02 (2006.01) F16F 1/38 (2006.01)

Patent

CA 2189041

A steel inner tube (40) and thermoplas- tic outer tube (42) are placed in an injection mold apparatus and a thermoplastic intermedi- ate tube (44) is molded between the inner (40) and outer (42) tubes. The intermediate tube (44) shrink fit locks to the inner (40) tube and shrinks relative to the outer tube (42) to provide a se- lected journal-bearing torque relation therebe- tween. Projections and mating recesses (62) on the inner tube (40) and intermediate tube (44) facilitate locking the intermediate tube (44) to the inner tube (40) without adhesives or other bonding agents. One or more thrust rings (58) and recesses (66) are formed on the mating sur- faces of the outer tube (42) and intermediate tube (44) to preclude axial relative displacement therebetween in response to axial thrust loads. An elastomeric tubular member (46) (or other known bushing construction) is secured over the outer tube (42) and an outer steel tube (48) is over the elastomeric member (46) to provide an enhanced control arm bushing with a predeter- mined torque response for automotive suspen- sion systems.

Un tube d'acier intérieur (40) et un tube thermoplastique extérieur (42) sont disposés dans un appareil à mouler par injection, à la suite de quoi un tube thermoplastique intermédiaire (44) est moulé entre le tube intérieur (40) et le tube extérieur (42). L'ajustement fretté du tube intermédiaire (44) se serre sur le tube intérieur (40) et subit un retrait par rapport au tube extérieur (42), ce qui a pour effet de créer entre ces éléments un couple déterminé palier-tourillon. Les épaulements et les gorges correspondantes (62) du tube intérieur (40) et du tube intermédiaire (44) facilitent le serrage du tube intermédiaire (44) sur le tube intérieur (40) sans adhésif ou autre agent tel que la colle. Une ou plusieurs bagues de roulement (58) et gorges (66) sont formées sur les surfaces coïncidentes du tube extérieur (42) et du tube intermédiaire pour empêcher les déplacements axiaux relatifs en réaction aux charges de poussée axiales. Un élément tubulaire élastomère (46) (ou un autre dispositif connu de manchon) est fixé sur le tube extérieur (42) et un tube d'acier extérieur (48) est disposé au-dessus de l'élément élastomère (46), conférant ainsi à un dispositif amélioré de palier bras de suspension, un couple réactionnel prédéterminé dans un système de suspension d'automobile.

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