Transmission for offroad vehicle

A transmission arrangement for an offroad vehicle having a frame, at least two wheels supporting said frame, an internal combustion engine supported by said frame, said engine having at least one cylinder, a piston reciprocally positioned in said cylinder, said piston driving a crankshaft of said engine, said crankshaft at least partially positioned in a crankcase chamber at least partially defined by a crankcase, said vehicle having a longitudinal centerline, said crankshaft of said engine extending along a first axis transverse to said centerline, said transmission positioned in a transmission chamber at least partially defined by a transmission cover, a primary shaft positioned in said transmission chamber and selectively driven by said crankshaft through a centrifugal clutch, said clutch being positioned along said first axis in a clutch chamber that is generally segregated from said transmission chamber and from said crankcase chamber, a main shaft positioned in said transmission chamber and offset from said primary shaft, said main shaft driven by said primary shaft by a belt, said main shaft arranged to drive said at least one of said at least two wheels, said clutch being positioned between a first bearing supporting said crankshaft and a second bearing supporting said crankshaft and between said piston and said belt and said second bearing being interposed between said clutch and said belt.

A transmission arrangement for an offroad vehicle having a frame, at least two wheels supporting said frame, an internal combustion engine supported by said frame, said engine having at least one cylinder, a piston reciprocally positioned in said cylinder, said piston driving a crankshaft of said engine, said crankshaft at least partially arranged in a crankcase chamber and arranged to drive at least one of the wheels through said transmission, said vehicle having a longitudinal centerline, said crankshaft of said engine extending along a first axis that is generally transverse to said centerline, said transmission including a transmission chamber partially defined by a transmission cover, a primary shaft positioned in said transmission chamber and selectively driven by said crankshaft through a clutch, a main shaft being positioned in said transmission chamber and being offset from said primary shaft, said main shaft being driven by said primary shaft by a belt, said main shaft being arranged to drive at least one of said at least two wheels, said primary shaft having a first end and a second end, said second end being rotatably supported by said transmission cover, said primary shaft rotating about said first axis, said clutch being mounted to said crankshaft and a belt drive being mounted to said primary shaft, and a dividing wall dividing a portion of said transmission chamber into a clutch chamber in which said clutch is mounted, said clutch chamber being generally segregated from said crankcase chamber and said transmission chamber, and said clutch including at least one shoe element for selective engagement with a clutch plate, said clutch plate forming a portion of said dividing wall.

A transmission arrangement for an offroad vehicle having a frame, at least two wheels supporting said frame, an internal combustion engine supported by said frame, said engine having at least one cylinder, a piston reciprocally positioned in said cylinder, said piston driving a crankshaft of said engine, said crankshaft at least partially positioned in a crankcase and arranged to drive at least one of the wheels through said transmission, said vehicle having a longitudinal centerline, said crankshaft of said engine extending along a first axis transverse to said centerline, said transmission including a transmission chamber defined by a cover, a primary shaft positioned in said transmission chamber and selectively driven by said crankshaft through a centrifugal clutch, a main shaft positioned in said transmission chamber and offset from said primary shaft, said main shaft driven by said primary shaft by a belt, said main shaft arranged to drive said at least one of said wheels, said clutch being positioned along said first axis in a clutch chamber, said clutch chamber being separated from said crankcase and said transmission chamber, said clutch being positioned between at least one first bearing supporting said crankshaft and at least one second bearing supporting said crankshaft, a wall dividing said crankcase chamber from said clutch chamber, and lubricant being supplied to said clutch chamber and flowing through a drain passage leading through said wall to said crankcase chamber.

A transmission arrangement for an offroad vehicle having a frame, at least two wheels supporting said frame, an internal combustion engine supported by said frame, said engine having at least one cylinder, a piston reciprocally positioned in said cylinder, said piston driving a crankshaft of said engine, said crankshaft at least partially positioned in a crankcase and arranged to drive at least one of the wheels through said transmission, said vehicle having a longitudinal centerline, said crankshaft of said engine extending along a first axis transverse to said centerline, said transmission including a transmission chamber defined by a cover, a primary shaft positioned in said transmission chamber and selectively driven by said crankshaft through a centrifugal clutch, a main shaft positioned in said transmission chamber and offset from said primary shaft, said main shaft driven by said primary shaft by a belt, said main shaft arranged to drive said at least one of said wheels, said clutch being positioned along said first axis in a clutch chamber, said clutch chamber being separated from said crankcase and said transmission chamber, said clutch being positioned between at least one first bearing supporting said crankshaft and at least one second bearing supporting said crankshaft, said primary shaft and said clutch being provided at a first end of said crankshaft and a starter being provided at a second end of said crankshaft.

A transmission arrangement for an offroad vehicle having a frame, at least two wheels supporting said frame, an internal combustion engine supported by said frame, said engine having at least one cylinder, a piston reciprocally positioned in said cylinder, said piston driving a crankshaft of said engine, said crankshaft at least partially positioned in a crankcase and arranged to drive at least one of the wheels through said transmission, said vehicle having a longitudinal centerline, said crankshaft of said engine extending along a first axis transverse to said centerline, said transmission including a transmission chamber defined by a cover, a primary shaft positioned in said transmission chamber and selectively driven by said crankshaft through a centrifugal clutch, a main shaft positioned in said transmission chamber and offset from said primary shaft, said main shaft driven by said primary shaft by a belt, said main shaft arranged to drive said at least one of said wheels, said clutch being positioned along said first axis in a clutch chamber, said clutch chamber being separated from said crankcase and said transmission chamber, said clutch being positioned between at least one first bearing supporting said crankshaft and at least one second bearing supporting said crankshaft, said clutch chamber being separated from said crankcase by a dividing wall, and said dividing wall supporting a bearing rotatably supporting said crankshaft.