Mower drive belt tensioner and drive train of mower

A mower drive belt tensioner comprising:

• an idler pulley configured to be engaged by a drive belt;
• an idler arm comprising:
• a pulley support configured to rotatably support the idler pulley;
• and
• a shaft support opposite to the pulley support;
• a shaft having a central axis along which the shaft extends and a circumference provided around the central axis, the shaft being connected to the shaft support of the idler arm, the shaft support protruding from the shaft in a radial direction with respect to the central axis;
• a flange provided on the shaft apart from the shaft support and protruding from the shaft in the radial direction;
• a guide tube provided between the shaft support and the flange along the central axis and configured to slidably receive the shaft, the guide tube comprising:
• a first tube end facing the flange;
• a second tube end facing the shaft support;
• and
• a tube hole which extends from the first tube end to the second tube end and through which the shaft passes;
• a stay provided on a mower deck to support the guide tube;
• and
• a spring selectively provided in a first space and a second space to bias the idler pulley, the first space being provided around the shaft between the first tube end and the flange, the second space being provided around the shaft between the second tube end and the shaft support,
• wherein the shaft support has a through hole fitting with the circumference such that the shaft support is slidable on the shaft.

A mower drive belt tensioner comprising:

• an idler pulley configured to be engaged by a drive belt;
• an idler arm comprising:
• a pulley support configured to rotatably support the idler pulley;
• and
• a shaft support opposite to the pulley support;
• a shaft having a central axis along which the shaft extends, the shaft being connected to the shaft support of the idler arm, the shaft support protruding from the shaft in a radial direction with respect to the central axis;
• a flange provided on the shaft apart from the shaft support and protruding from the shaft in the radial direction;
• a guide tube provided between the shaft support and the flange along the central axis and configured to slidably receive the shaft;
• a stay provided on a mower deck to support the guide tube and comprising a spring bearing protruding from the guide tube in the radial direction;
• and
• a spring selectively mountable in either a first space or a second space, the first space being provided around the shaft and the guide tube between the spring bearing and the flange, the second space being provided around the shaft and the guide tube between the spring bearing and the shaft support, the spring being configured to pull the shaft support when the spring is mounted in the first space, the spring being configured to push the shaft support when the spring is mounted in the second space.

A mower drive belt tensioner comprising:

• an idler pulley configured to be engaged by a drive belt;
• an idler arm comprising:
• a pulley support configured to rotatably support the idler pulley;
• and
• a shaft support opposite to the pulley support;
• a shaft having a central axis along which the shaft extends, the shaft being connected to the shaft support of the idler arm, the shaft support protruding from the shaft in a radial direction with respect to the central axis;
• a flange provided on the shaft apart from the shaft support and protruding from the shaft in the radial direction;
• a guide tube provided between the shaft support and the flange along the central axis and configured to slidably receive the shaft, the guide tube comprising:
• a first tube end facing the flange;
• a second tube end facing the shaft support;
• and
• a tube hole which extends from the first tube end to the second tube end and through which the shaft passes;
• a stay provided on a mower deck to support the guide tube;
• and
• a spring selectively mountable in either a first space or a second space, the first space being provided around the shaft between the first tube end and the flange, the second space being provided around the shaft between the second tube end and the shaft support, the spring being configured to pull the shaft support when the spring is mounted in the first space, the spring being configured to push the shaft support when the spring is mounted in the second space.