Continuously variable transmission

A tractor comprising:

• a motor of the tractor;
• a continuously variable transmission coupled to the motor, the continuously variable transmission comprising:
• a plurality of speed adjusters;
• a drive disk adapted to operationally engage the speed adjusters;
• a bearing disk adapted to provide rotational force to the drive disk;
• and
• a disengagement mechanism adapted to disengage the drive disk from the speed adjusters, the disengagement mechanism positioned between the bearing disk and the drive disk.

A tractor comprising:

• a motor of the tractor;
• a continuously variable transmission coupled to the motor, the continuously variable transmission comprising:
• a generally tubular split shaft coaxial with a longitudinal axis of the transmission and having a threaded end;
• a rod having first and second ends and located coaxially within the split shaft;
• a worm screw attached to the first end of the rod and having a set of external threads;
• a sleeve having a set of internal threads that fit around and engage the external threads of the worm screw;
• and
• a shifting tube that engages the second end of the rod and has a set of internal threads that fit over and engage the threaded end of the split shaft.