POWER-ASSISTED GEAR-SHIFT MECHANISM FOR MANUAL TRANSMISSION

摘要

A gear-shift mechanism includes a lateral casing (21b) mounted on a transmission housing (21a), a first lateral shaft (11) rotatably mounted within the casing and being operatively connected to a manual shift lever (23) to be rotated in shifting operation of the shift lever, and a second lateral shaft (12) in the form of a hollow shaft rotatably and axially slidably mounted on the first lateral shaft and being operatively connected to the manual shift lever to be axially moved in selecting operation of the shift lever, the second lateral shaft being integrally provided with a shift-and-select lever (12b) which extends into an interior of the transmission housing to be selectively engaged with a plurality of shift heads (25a, 25b, 25c) in axial movement of the second lateral shaft. The gear-shift mechanism is associated with a hydraulic power cylinder assembly (13, 14, 15) which is integrally connected to one end of the lateral casing (21b) to provide a hydraulic power assist in accordance with operation torque applied to the first lateral shaft (11) in shifting operation of the manual shift lever.