Patent ID: 6666104
Filing Date: 2003-12-23
Classification: F16H,Y10T

Abstract:
A gear shift device for a manual gear change transmission having a housing with a shift dome (1), said transmission including a plurality of shift rails (17) arranged in side-by-side relationship and being longitudinally movable along shifting gears of said transmission, a joint carrier (3) supported in said shift dome (1) pivotally about a shift axis (4â€”4), which extends normal to a vertical transmission plane oriented in the longitudinal direction of said shift rails (17), a shift lever (8) supported on said joint carrier (3) pivotally about a horizontal operating axis (5â€”5) extending in said vertical transmission plane and having an upwardly extending operating arm of a length A and a downwardly extending forked actuating arm (9) forming a downwardly open holding space, a shift finger (12) supported by said joint carrier (3) pivotally about a shift finger pivot axis (10â€”10) extending parallel to, and in spaced relationship from, said shift lever operating axis (5â€”5) through said holding space of said forked actuating arm (9) and projecting downwardly out of said open holding space and having at its downwardly projecting free end a shift member (16) received in engagement grooves (17a) formed in said shift rails (17) at a distance D from said shift finger pivot axis (10â€”10) for longitudinally moving said shift rails (17) when said shift lever (8) is pivoted with said joint carrier (3) about said shift axis (4â€”4), said shift finger (12) further having side projections (24) providing for snug engagement with said forked actuating arm (9) at a distance B from said shift lever operating axis (5â€”5) and a distance C from said shift finger pivot axis (10â€”10) so as to be pivotable thereby about said shift finger pivot axis (10â€”10) when said shift lever (8) is pivoted about said shift lever operating axis (5â€”5) for pivoting said shift finger (12) about said shift finger pivot axis (10â€”10) at a movement increasing ratio of iw=A/BÃ—C/D.