ANTI-RATTLE GEARSHIFT LINKAGE MECHANISM FOR A MANUALLY CONTROLLED AUTOMOTIVE POWER TRANSMISSION MECHANISM

摘要

A gearshift linkage mechanism for a manually-controlled, three-speed transmission for an automotive vehicle including two ratio controlling shift levers mounted for rotary oscillation on the base of an automotive vehicle steering column, a gearshift selector sleeve shaft journalled for oscillatory and translatory movement on the steering column, one lever being adapted to control ratio changes between the low ratio and reverse drive ratio and the other lever being adapted to control ratio changes between the intermediate ratio and a high speed ratio, a bearing supporting rotatably the gearshift levers on the base of the column, a pair of clutch keys secured to the shift selector shaft, registering clutch keyways formed in each shift lever, a cam surface formed on one key which is adapted to register with a corresponding cam surface on one margin of the intermediate and high shift lever and spring means for urging the selector shaft and cammed key into engagement with the cooperating surface of the intermediate and high shift lever thereby preventing unwanted lost motion and rattling of the gearshift linkage when the transmission mechanism is conditioned for high speed ratio operation.