BI-DIRECTIONAL SPRING HOLDER ASSEMBLY FOR AN ACTUATOR
An actuator having a bi-directional spring holder assembly is disclosed. The assembly has a substantially cylindrical housing (42) having a projection (60) formed on a rim of its cylindrical wall (56). The projection (60) is provided with first and second abutments (62, 64) facing in opposite direct...
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Format: | Patent |
Sprache: | eng ; fre |
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Zusammenfassung: | An actuator having a bi-directional spring holder assembly is disclosed. The assembly has a substantially cylindrical housing (42) having a projection (60) formed on a rim of its cylindrical wall (56). The projection (60) is provided with first and second abutments (62, 64) facing in opposite directions along the circumference of the rim (58). A spring (70) is mounted around a shaft which passes through a longitudinal axis of the housing. A first, internal spring end (72) is engaged to the shaft while a second, external spring end (74) projects radially outward of the cylindrical wall (56). The assembly also includes a spring cover (80) provided with a cover abutment (84) which similarly projects radially outward of the cylindrical wall (56). When the holder assembly is assembled, the spring (70) is coiled and the cover abutment (84) pushes against the projection's first abutment (62) while the external spring end (74) pushes against the second abutment (64). The actuator housing is provided with a wall member (48), one side of which forms a stop for the cover abutment (84), while the other side serves as a stop for the external spring end (74). When the gear train is driven, one of the cover abutment (84) and the external spring end (74) abut a corresponding stop, and the entire housing (42) rotates with the output lever, causing the spring to coil. The coiled spring then provides a restoring force, returning the output lever to the neutral position.
L'invention porte sur un actionneur muni d'un porte-ressort bidirectionnel. Ledit porte-ressort comprend une enceinte (42) cylindrique dont l'un des bords circulaires présente une saillie (60) présentant une première et une deuxième butée respectivement tournées dans des directions opposées le long de la circonférence du bord (58). Un ressort (70) est monté autour d'un axe traversant longitudinalement l'enceinte. Une première extrémité (72), intérieure, du ressort s'engage dans l'axe, tandis que la deuxième extrémité (74), extérieure, saille radialement de la paroi cylindrique (56) vers l'extérieur. Le porte-ressort comprend également un couvre-ressort (80) muni d'une butée qui, de même manière, saille radialement de la paroi cylindrique (56) vers l'extérieur. Lorsque le porte-ressort est assemblé, le ressort est enroulé et la butée du couvre-ressort (84) bute contre la première butée (62) de la saillie, tandis que l'extrémité extérieure du ressort (74) bute contre la deuxième butée (64) de la saillie. L'ence |
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