Patent ID: 6314853
Filing Date: 2001-11-13
Classification: B23D,B27G,E01B,F02B,Y10T

Abstract:
A cutting apparatus for cutting an elongated workpiece comprising:a rotatable blade for cutting the workpiece;a blade cover for covering the blade;a driver for driving the blade;a frame for supporting the blade, the blade cover and the driver;a cover support link mechanism located between the frame and the blade cover; anda driver support link mechanism located between the frame and the driver; wherein the cover support link mechanism permits the blade cover to move while maintaining substantially the same attitude during cutting, wherein the driver support link mechanism is a four-link mechanism consisting of a first stationary link fixed to the frame, a first follower link connected to the driver and parallel to the first stationary link, a first main driving link, and a first regulating link, wherein the first stationary link connects the first main driving link and the first regulating link, and the first follower link connects the first main driving link and the first regulating link, wherein the length of the first stationary link is substantially equal to that of the first follower link, and the length of the first regulating link is substantially equal to that of the first main driving link, and wherein the driver support link mechanism moves the driver while the driver maintains a substantially constant attitude;wherein the cover support link mechanism is a constrained link chain, and wherein the cover support link mechanism is a four-link mechanism consisting of a second stationary link fixed to the frame, a second follower link connected to the blade cover and parallel to the second stationary link, a second main driving link, and a second regulating link, wherein the second stationary link connects the second main driving link and the second regulating link, and the second follower link connects the second driving link and the second regulating link, wherein the second regulating link is substantially parallel to the second main driving link.