Patent ID: 6779952
Filing Date: 2004-08-24
Classification: B23Q,F16H,Y10T

Abstract:
A stepless speed change bench drill, comprising:a pedestal (19); a vertical post (18) mounted on said pedestal (19); a worktable (17) and a cabinet (16) which are mounted on said vertical post (18); a driving shaft (2) and a main shaft (24) which are mounted on an upper portion of said cabinet (16); a motor (1) for transmitting power to said driving shaft (2); a motor movable wheel (4) and a motor stationary wheel (5) which are mounted on said driving shaft (2); and a main shaft movable wheel (11) and a main shaft stationary wheel (12) which are mounted on said main shaft (24), wherein a speed regulation device is provided between the driving shaft and the main shaft, said speed regulation device comprises a speed regulation shaft (9) provided with a threaded section (31), said threaded section (31) is engaged with a threaded hole (25) formed on a bearing block (10), said bearing block (10) is simultaneously mounted on the main shaft (24), said speed regulation shaft (9) is rotated by a speed regulation hand wheel (15).