| 摘要 |
This disclosure relates to tufting machines and in particular an adjustable crankshaft for varying the needle stroke in such machines which includes means for changing the position of the connecting rod relative to the crankshaft bearing blocks and the axis of the crankshaft whereby the crank throw will be changed and thus the needle stroke. An adjustable counterweight mechanism is also provided which may be adjusted in the same manner as the connecting rod but opposite thereto which results in a balanced crankshaft drive mechanism. |
