Band saw machine with disk brake device

A band saw machine with a disk brake device, the band saw machine comprising a base, a vertical post mounted on the base, a worktable disposed at a middle portion of the vertical post, an upper wheel box disposed above the worktable and coupled to the vertical post, a lower wheel box disposed under the worktable and coupled to the vertical post, and a saw band, the worktable having a through trough thereon, the lower wheel box comprising a support member having a flat surface, a lower gravity wheel being pivotally connected with the flat surface through a wheel axle, the lower gravity wheel comprising a driven wheel which is to be turned synchronously with the lower gravity wheel, a drive wheel being disposed under the driven wheel and driven by an axle of a motor, a drive belt being fitted on the drive wheel and the driven wheel, enabling the lower gravity wheel to turn, the saw band being an annular metallic band passing through the upper wheel box, the through trough of the worktable, and the lower gravity wheel of the lower wheel box to be turned circularly, characterized by:

• the lower gravity wheel being provided with a disk, wherein the lower gravity wheel is to be turned synchronously with the disk;
• the lower wheel box being provided with a brake seat having a crank, the brake seat being coupled to an outer edge of the disk;
• the support member including a positioning shaft and a through hole, the positioning shaft and the through hole being disposed close to the base, the positioning shaft being pivotally connected with a brake wire to pull a brake lever of the crank, an upper end of the brake lever is provided with a micro switch seat, an elastic member being provided between a distal end of the brake lever and the through hole of the support member;
• thereby, when the brake lever is pressed, the act of pressing the brake lever moves the upper end of the brake lever away from the micro switch seat, enabling the motor to stop running, and the brake wire links the crank to bring a brake action relative to the disk for an emergent stopping.