Transmission device of a table saw

• US 20030101857A1
• Filed: 12/05/2001
• Published: 06/05/2003
• Est. Priority Date: 12/05/2001
• Status: Active Grant

• Current Assignee: Bor Yann Chuang
• Original Assignee: Bor Yann Chuang
• Inventors: Chuang, Bor Yann
• Granted Patent: US 6,722,242 B2
• Time in Patent Office: Days
• US Class Current: 83/477.1
• CPC Class Codes: B23D 45/065 with the saw blade carried by a pivoted lever
• CPC Class Codes: B23D 47/12 of drives for circular saw blades
• CPC Class Codes: Y10T 83/7697 Tool angularly adjustable relative to work-support
• CPC Class Codes: Y10T 83/7705 Adjustable angular relationship
• CPC Class Codes: Y10T 83/7726 By movement of the tool
• CPC Class Codes: Y10T 83/773 Work-support includes passageway for tool [e.g., slotted table]
• CPC Class Codes: Y10T 83/8773 Bevel or miter cut

Abstract

A transmission device of a table saw includes a motor and an elevating member provided on a base. A first belt is connected around the belt pulley on the front end of the motor and around a transfer member, and a second belt connected around the transfer member and around the belt pulley of a circular saw blade. The first and the second belts are activated to rotate and carry on transmission at fixed positions so as to improve the defect of a conventional device that the belt may become loose or over tight when the saw blade of the table sawing machine is moving up or down.

Claims

1. A transmission device of a table saw comprising a box, a base, and an elevating member and a motor:

Said box having a table on top, said table having a sawing slot formed at a preset position in a center for an upper portion of a circular saw blade to protrude out therethrough for cutting off wood materials;

Said base installed in said box and provided with a motor on a preset position;

Said elevating member having a first shaft hole and a second shaft hole formed apart by a preset distance, a first support shaft having its right end fixed on said base and its left end inserting through said first shaft hole and then pivotally fitted with a rotatable transfer member having a front and a rear belt pulley connected together, a second support shaft having its right end secured with said circular saw blade and its left end passing through said second shaft hole and then pivotally fitted with the belt pulley of said circular saw blade, then a first belt connected around the belt pulley on the front end of said motor and around said front belt pulley of said transfer member, a second belt connected around said rear belt pulley of said transfer member and around the belt pulley of said second support shaft.

2. The transmission device of a table saw as claimed in claim 1, wherein said elevating member is provided with an arc-shaped plate at a lower portion having a gear along its curved bottom, and an elevating handle is connected in center with a rotating shaft formed with a worm on a front end to mesh with said gear under said elevating member.

3. The transmission device of a table saw as claimed in claim 1, wherein said base is provided with a front and a rear locking hole spaced apart at bottom side, and said motor has a front and a rear plate provided in parallel on the top of its casing and each said plate has a through hole facing each other for a fixing shaft to insert through and to be fitted in said rear locking hole of said machine base, said front plate having a curved slot formed at a front side for a bolt to insert through and then be fixed in said front locking hole of said machine base, thus the position of said motor capable to be adjusted by shifting of said curved slot.