BLADE ELEVATION MECHANISMS AND ANTI-BACKDRIVE MECHANISMS FOR TABLE SAWS

摘要

Elevation mechanisms for table saws and anti-backdrive mechanisms for use in elevation mechanisms for table saws are disclosed. The anti-backdrive mechanisms typically include three sub-assemblies: an input assembly, an output assembly, and a fixed assembly. The anti-backdrive mechanisms prevent a torque related to the output assembly from changing the blade elevation. For example, the weight of the blade and the structure supporting the blade is prevented from backdriving the elevation mechanism and allowing the blade to drop.

主权项

1. A table saw comprising:
a table defining a work surface; a substantially planar, circular blade configured to extend at least partially above the work surface; a motor to spin the blade; an elevation system configured to change the elevation of the blade relative to the work surface, where the elevation system includes a handwheel adapted to be turned by a user to raise the blade from a fully lowered position to a fully elevated position with 5 turns or less of the handwheel; and an anti-backdrive mechanism configured to prevent gravity from causing the blade to drop more than a quarter of an inch when a user releases the handwheel.