Shift gear, specifically for motor vehicles

A shift gear arrangement for a motor vehicle transmission, which motor vehicle has an engine;

• said transmission comprising a housing, an input shaft, an output shaft, a main shaft and at least one auxiliary shaft, which transmission is operable to transfer power between said engine and said output shaft;
• a plurality of gear groups, each of said gear groups having at least two gears which are in constant mesh, said gears mounted on said main shaft and said at least one auxiliary shaft;
• each of said auxiliary shaft mounted gears of said gear groups is secured to and rotates with said auxiliary shaft;
• each of said main shaft mounted gears of said gear groups is rotatable on said main shaft;
• sliding sleeves mounted on said main shaft, said sleeves nonrotatable about said main shaft and axially slidable thereon to engage and couple at least one of said main shaft mounted gears;
• a clutch device mounted in said transmission is operable as a starting clutch and to interrupt power transfer from the engine to the output shaft,
• said clutch device having a friction brake with a rotor (24, 107) and at least one friction face, and a planetary gear set (50, 120) with a plurality of gear components (103, 104.sub.3, 105.sub.3),
• the first gear component (11, 103) is a ring gear (103) which rotates with the main shaft (102), the second gear component (22, 105.sub.3) is a sun gear (105.sub.3) connected with the brake rotor (107), and the third gear component (26, 104.sub.3) is a planet carrier connected with output shaft (104);
• a shift clutch (29) with at least one friction face mounted in said transmission and operable between said output shaft (27, 104) and said brake rotor (24, 107);
• a central synchronizing device including an electronic control and being operable to selectively provide one of acceleration and retardation of said main transmission shaft via said clutch device at disengagement of said sliding sleeves, said synchronizing device operable to cooperate with each sliding sleeve to positively couple said sleeve with at least one gear on said main shaft,
• said housing having an end wall, which housing and end wall cooperate to define generally in proximity to said output shaft, and downstream of said planetary gear set a dry space in said housing;
• said friction brake and shift clutch friction faces mounted and operable in said dry space.

A shift gear arrangement for a motor vehicle transmission, which motor vehicle has an engine;

• said transmission comprising a housing, an input shaft, an output shaft, a main shaft and at least one auxiliary shaft, which transmission is operable to transfer power between said engine and said output shaft;
• a plurality of gear groups, each of said gear groups having at least two gears which are in constant mesh, said gears mounted on said main shaft and said at least one auxiliary shaft;
• each of said auxiliary shaft mounted gears of said gear groups is secured to and rotates with said auxiliary shaft;
• each of said main shaft mounted gears of said gear groups is rotatable on said main shaft;
• sliding sleeves mounted on said main shaft, said sleeves non-rotatable about said main shaft and axially slidable thereon to engage the couple at least one of said main shaft mounted gears;
• a clutch device mounted in said transmission is operable as a starting clutch and to interrupt power transfer from the engine to the output shaft,
• said clutch device having a first friction brake with a rotor (24;
• 107) and a planetary gear set (50;
• 120), which planetary gear set has a plurality of gear components including a first component (11;
• 103) constantly coupled with said main shaft (9, 102), and a second component (22;
• 105.sub.3) constantly coupled to the rotor (24;
• 107) of the friction brake, and a third component (26;
• 104.sub.3) constantly coupled to said output shaft (27, 104);
• a shift clutch (29) mounted in said transmission and operable between said output shaft (27, 104) and said brake rotor (24, 107);
• an accelerating device for accelerating the main shaft, and a second friction brake for decelerating said main shaft;
• a central synchronizing device including an electronic control and being arranged to provide one of acceleration and retardation of said main transmission shaft via said accelerating device and said second friction brake, respectively, at disengagement of said sliding sleeves, said synchronizing device operable to cooperate with each sliding sleeve to positively couple said sleeve with at least one gear on said main shaft.