Angular adjustment apparatus for a miter saw and miter saw assembly

Abstract

An angle adjustment device (20) for a miter saw (10) having a base (16) and a turntable (14) mounted on the base for rotation about a substantially centrally located axis (36) , the turntable has a handle portion (22) for rotating the turntable relative to the base. The device comprises an arcuate rack (30) on the base, and an elongated adjustment mechanism (32) attached to the handle portion. The adjustment mechanism includes a pinion (48) and a control wheel (52), the pinion meshing with the rack when the pinion is in contact with the rack; the control wheel is operatively connected to the pinion. A control wheel is rotatable about an axis (54) concentric with said pinion and is movable along said concentric axis to selectively engage and disengage said pinion from said rack (30), wherein when said When the pinion is engaged with the rack, rotation of the control wheel causes the turntable (14) to rotate relative to the base (16).

Description

technical field [0001] The present invention relates generally to power tools, and in particular to power miter saws. Background technique [0002] Conventional miter saws can often set the miter angle at a number of predetermined positions. Typically, a conventional miter saw includes a stationary base on which a rotatable turntable is mounted, the base having a plurality of locating slots for engagement with a lever attached to the turntable. Due to the interaction of the lever and the detent on the base, the turntable can be set in a pre-selected miter position. By way of example, such an arrangement may provide locating slots at positions 45° to the left and 22.5° to the right relative to a central locating slot perpendicular to a stationary guardrail formed or mounted on the base. In addition, some miter saws can also adjust the miter position to other positions than the predetermined positioning slot. However, due to the interaction between the lever and the detent,...

AI Technical Summary

Problems solved by technology

However, the range of precise adjustment cannot be achieved within the full range of the bevel angle, and can only be limited to a specific area centered on the positioning groove within the full range

[0004] While miter saws have achieved rapid, wide-range rotation of the turntable relative to the base, and also limited precise adjustment relative to preselected angle settings, none of the known examples of such saws have achieved full range Fast, wide-range rotation of the turntable and precise adjustment of bevel angles within the range, and these examples are relatively complex and not easily controlled by the user

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