Cvt spider lock

A vehicle comprising a primary drive clutch system for a continuously variable transmission, the primary drive clutch system coupled to a drive shaft that is capable of rotation comprising:

• a stationary sheave coupled adjacent the drive shaft;
• a movable sheave, housing and spider portion coupled adjacent the drive shaft, the movable sheave being movable closer to or further from the stationary sheave along the drive shaft;
• and
• a securing member coupled to the drive shaft capable of inhibiting movement of said spider relative to the drive shaft.

A method for securing the coupling of a CVT to a shaft, comprising:

• threading the shaft to couple to corresponding threads of a spider portion such that when the shaft rotates in a forward direction tightening of the spider portion with respect to a shaft shoulder occurs;
• reverse threading a portion of the shaft to reverse threadingly couple a securing member to the shaft such that when the shaft rotates in a reverse direction or decelerates tightening of the securing member with respect to the spider portion occurs;
• coupling the spider portion to the shaft;
• and
• locking the position of said spider portion with respect to the shaft by said securing member.

A vehicle comprising a primary drive clutch system for a continuously variable transmission, the primary drive clutch system coupled to a drive shaft that is capable of rotation or acceleration, comprising:

• a stationary sheave coupled adjacent the drive shaft at least in part using a securing member coupled to the drive shaft capable of inhibiting movement of said stationary sheave to the drive shaft;
• wherein the drive shaft has a corresponding locking structure configured to couple to said securing member,
• wherein said corresponding locking structure comprises threading for coupling said stationary sheave to the drive shaft where forward rotation of the drive shaft will cause said stationary sheave to tighten on the drive shaft, and
• wherein said corresponding locking structure further comprises reverse threads which will cause tightening of said securing member when the drive shaft is rotated in the reverse direction or is decelerated.