Engine starter gearing having improved grease retention

F - Mech Eng,Light,Heat,Weapons – 02 – N

Patent

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Details

F02N 15/06 (2006.01)

Patent

CA 2193260

An engine starter gearing for starting an engine having a starter gear includes a power shaft (12) and a housing (14) affixed on the power shaft. The housing retains an axially displaceable driven clutch member (16). An internal groove (42) is provided within an open end of the housing. The driven clutch member has an enlarged external diameter portion that fits within the housing. The driven clutch member is held in position by a compressed spring (36) retained within the housing. An installation groove (46) is formed in the driven clutch member spaced away from the enlarged diameter portion. A lock ring (44) is positioned within the housing by first inserting it in the installation groove. The driven clutch member is axially depressed inwardly within the housing, compressing the spring until the locking ring snaps in position in the housing internal groove. The locking ring has an internal diameter that closely fits the external diameter of the driven clutch member forming a grease seal so that as the driven clutch member is axially displaced relative to the housing during starting operations, the escape of grease from the housing is reduced.

Un engrenage placé entre un démarreur de moteur et le moteur comprend un arbre d'entraînement (12) et un logement (14) fixé sur l'arbre d'entraînement. Le logement comporte un élément d'embrayage entraîné (16), capable de se déplacer axialement. Une rainure interne (42) est prévue à l'extrémité ouverte du logement. L'élément d'embrayage entraîné a une portion à diamètre externe augmenté qui s'adapte à l'intérieur du logement. L'élément d'embrayage entraîné est tenu en position par un ressort comprimé (36) retenu dans le logement. Une rainure d'installation (46) est formée dans l'élément d'embrayage entraîné à une certaine distance de la portion à diamètre augmenté. On place un anneau de verrouillage (44) dans le logement en l'insérant d'abord dans la rainure d'installation. L'élément d'embrayage entraîné est déplacé axialement vers l'intérieur du logement, en comprimant le ressort jusqu'à ce que l'anneau de verrouillage se place dans la rainure interne du logement. L'anneau de verrouillage a un diamètre interne qui s'adapte sans jeu au diamètre externe de l'élément d'embrayage entraîné, pour former un joint d'étanchéité pour la graisse, si bien que, lorsque l'élément d'embrayage entraîné est déplacé axialement par rapport au logement durant les opérations de démarrage, les pertes de graisse hors du logement sont diminuées.

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