Table saw blade driving mechanism
OwnerMark Fianza Boseman, John Fianza Bosemaninventors
Life of this patent
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Abstract
An improved adjustable blade height and driving mechanism for a table saw, wherein the design is compact and the weight of the drive motor is not an applied load upon the operator rotating a hand crank or upon an actuating motor. The table saw comprises a main frame and a saw blade mounted to and driven by a belt driving mechanism comprising a pivotable frame that is pivotable about an axis parallel to the saw cutting axis, an electrical motor mounted stationary to the pivotable frame, and a blade height adjusting device to raise and lower the blade wheel relative to the work-piece support surface while the electric drive motor remains stationary.
Claims14
A blade driving mechanism of a table saw, wherein the table saw comprises a main frame assembly, a work-piece support platform mounted to said main frame assembly and having a saw slot and saw slot axis;
- and a blade wheel mounted to and driven by said blade driving mechanism disposed under said work-piece support surface;
- said blade driving mechanism comprising:
- a) a tilt frame, pivotable about an axis generally parallel to said saw slot axis;
- b) an electrical motor mounted substantially stationary to said tilt frame;
- said electrical motor having a drive pulley mounted to its output shaft;
- c) a belt driving system comprising:
- (i) a blade arm having a blade pulley rotatably mounted thereto about an axis, said blade pulley connected to a blade wheel shaft for driving the blade wheel to rotate;
- said blade arm pivotable about a pivot axis fixedly attached to said tilt frame;
- (ii) a counter arm having a counter pulley rotably mounted thereto about an axis;
- said counter arm mounted coaxially with said blade arm and pivotable about said pivot axis;
- and (iii) a drive belt drivingly interconnecting said drive pulley, blade pulley, and counter pulley;
- and d) a blade height adjusting device configured to raise and lower the blade wheel relative to the work-piece support surface, said height adjusting device comprises a worm gear assembly configured to rotate said blade arm about its pivot axis to raise and lower said blade wheel, a gear of said worm gear assembly is fixedly attached to said blade arm, coaxially mounted to said pivot axis, such that said blade arm and said gear rotate together, a worm of said worm gear assembly is operatively coupled to and driven by a motor that is controllable via a control panel.
A blade driving mechanism of a table saw, wherein the table saw comprises a main frame assembly, a work-piece support platform mounted to said main frame assembly and having a saw slot and saw slot axis;
- and a blade wheel mounted to and driven by said blade driving mechanism disposed under said work-piece support surface;
- said blade driving mechanism comprising:
- a) a tilt frame, pivotable about an axis generally parallel to said saw slot axis;
- b) an electrical motor mounted substantially stationary to said tilt frame;
- said electrical motor having a drive pulley mounted to its output shaft;
- c) a belt driving system comprising:
- (i) a blade arm having a blade pulley rotatably mounted thereto about an axis, said blade pulley connected to a blade wheel shaft for driving the blade wheel to rotate;
- said blade arm pivotable about a pivot axis fixedly attached to said tilt frame;
- (ii) a counter arm having a counter pulley rotably mounted thereto about an axis;
- said counter arm fixedly attached to said blade arm, said counter arm and blade arm pivot together about said pivot axis;
- and (iii) a drive belt drivingly interconnecting said drive pulley, blade pulley, and counter pulley;
- and d) a blade height adjusting device configured to raise and lower the blade wheel relative to the work-piece support surface, said height adjusting device comprises a worm gear assembly configured to rotate said blade arm about its pivot axis to raise and lower said blade wheel, a gear of said worm gear assembly is fixedly attached to said blade arm, coaxially mounted to said pivot axis, such that said blade arm and said gear rotate together, a worm of said worm gear assembly is operatively coupled to a hand crank.
A blade driving mechanism of a table saw, wherein the table saw comprises a main frame assembly, a work-piece support platform mounted to said main frame assembly and having a saw slot and saw slot axis;
- and a blade wheel mounted to and driven by said blade driving mechanism disposed under said work-piece support surface;
- said blade driving mechanism comprising:
- a) a tilt frame, pivotable about an axis generally parallel to said saw slot axis;
- b) an electrical motor mounted substantially stationary to said tilt frame;
- said electrical motor having a drive pulley mounted to its output shaft;
- c) a belt driving system comprising:
- (i) a blade arm having a blade pulley rotatably mounted thereto about an axis, said blade pulley connected to said blade wheel for driving the blade wheel to rotate;
- said blade arm pivotable about a pivot axis fixedly attached to said tilt frame;
- (ii) a counter arm having a counter pulley rotably mounted thereto about an axis;
- said counter arm mounted coaxially with said blade arm and pivotable about said pivot axis;
- and (iii) a drive belt drivingly interconnecting said drive pulley, blade pulley, and counter pulley;
- d) a blade height adjusting device configured to raise and lower the blade wheel relative to the work-piece support surface, said height adjusting device comprises a worm gear assembly configured to rotate said blade arm about its pivot axis to raise and lower said blade wheel, a gear of said worm gear assembly is fixedly attached to said blade arm, coaxially mounted to said pivot axis, such that said blade arm and said gear rotate together, a worm of said worm gear assembly is operatively coupled to and driven via a hand crank.
Dependencies are inferred from the claim text.