Transmission for trimmer/mower

A transmission mountable to a trimmer/mower having a chassis, a bearing housing mounted to said chassis, a drive shaft mounted for rotation in said bearing housing, and an engine or motor that drives the drive shaft in rotation about a substantially vertically oriented axis of rotation, wherein:

• said transmission has an input gear assembly that can engage said drive shaft and an output shaft that is driven in rotation by said input gear assembly about an axis of rotation that is transverse to an axis of rotation of said drive shaft;
• said input gear assembly including an input shaft mounted in journal bearings for rotation on which is mounted a worm, said input shaft having a socket for receiving said output shaft, said transmission having a casing, one of said bearing housing and said casing having external studs and the other of said bearing housing and said casing having mating pockets and that receive said external studs when said transmission is mounted on said bearing housing;
• and
• a device that prevents unintentional dismounting of the transmission from the bearing housing.

A trimmer/mower, comprising:

• a chassis;
• a bearing housing mounted to said chassis;
• a drive shaft mounted for rotation in said bearing housing;
• an engine or motor that drives the drive shaft in rotation about a substantially vertically oriented axis;
• and
• a transmission that is mountable to the bearing housing, having an input gear assembly that engages said shaft and an output shaft that is driven in rotation by engagement with said gear about an axis of rotation that is transverse to the drive shaft;
• said input gear assembly including an input shaft mounted in journal bearings for rotation on which is mounted a worm, said input shaft having a socket for receiving said drive shaft, said transmission having a casing and one of said bearing housing and said casing having external threads, and the other of said bearing housing and said casing having matching internal threads that receive said external threads when said transmission is mounted on said bearing housing;
• and
• a device that prevents unintentional dismounting of the transmission from the bearing housing.

A trimmer/mower comprising:

• a chassis;
• a bearing housing mounted to said chassis;
• a drive shaft mounted for rotation in said bearing housing;
• an engine or motor that drives the drive shaft in rotation about a substantially vertically oriented axis;
• and
• a transmission that is mountable to the bearing housing, having an input gear assembly that engages said shaft and an output shaft that is driven in rotation by engagement with said gear about an axis of rotation that is transverse to the drive shaft;
• and
• said input gear assembly including an input shaft mounted in journal bearings for rotation on which is mounted a worm, said input shaft having a socket for receiving said output shaft said transmission having a casing and one of said bearing housing and said casing having external studs and the other of said bearing housing and said casing having mating pockets that receive said external studs when said transmission is mounted on said bearing housing;
• and
• a device that prevents unintentional dismounting of the transmission from the bearing housing.