Hinge connections and power miter saw with hinge linkage linear guide including such hinge connections

摘要

A hinge connection between first and second links, including a shaft; a threaded aperture formed within an end portion of the shaft; and a pair of bearings. The hinge connection may optionally include a spacer surrounding the shaft. In addition, there is also a bushing surrounding the end portion of the shaft. A threaded fastening member is inserted into the threaded aperture of the shaft. Upon insertion and tightening of the threaded fastening member, any axial gap between the first bearing and the bushing is eliminated. Also disclosed is a hinge connection with a split shaft, including two cantilever shafts, where a main axial portion of each cantilever shaft is seated within a bore of the first link; and a pair of bearings, where an inner portion of each of the cantilever shafts is rotatably seated within one of the bearings.

主权项

1. A power saw comprising:
a table configured to receive a workpiece; a saw blade and motor assembly operatively connected to said table, said saw blade and motor assembly being configured to rotate a saw blade; a linear guide mechanism attached to said table and being configured to support said saw blade and motor assembly and enable movement of said saw blade and motor assembly along a predetermined linear path in either a forward or a rearward direction; said linear guide mechanism comprising at least two links connected by a hinge connection, wherein said hinge connection comprises:
a shaft that is fixed for rotation with respect to a first one of said links, but wherein said shaft is able to rotate with respect to a second one of said links;a threaded aperture formed within a first end portion of said shaft;a pair of bearings associated with said second link, wherein said shaft is seated within said bearings;a spacer surrounding said shaft, wherein said spacer is positioned between said bearings;a bushing surrounding said first end portion of said shaft, wherein said bushing is positioned such that a first one of said bearings is located between said spacer and said bushing;a threaded fastening member configured and arranged to be inserted into said threaded aperture of said shaft; anda bushing flange extending radially outwardly from a first end portion of said bushing, wherein at least a portion of said bushing flange is configured and arranged to receive an axial force applied by said threaded fastening member as said threaded fastening member is tightened.