| 摘要 |
An improved drive arrangement (19) for driving a rotatable cutting blade (20) of a concrete cutting machine (10) is disclosed comprising a first toothed pulley (56) mounted on a power output shaft (58) from the engine (18) of the machine, a toothed drive belt (60) connecting the first pulley (56) to a second toothed pulley (62) mounted on a transverse idler shaft (64), and a substantially centrally mounted multiple V-belt pulley system (66, 68, 70) for transmitting drive from the transverse idler shaft (64) to a blade drive shaft (54) for the cutting blade (20). The toothed pulley belt system (56, 60, 62) facilitates substitution of pulleys (56 and 62) of different diameters and/or numbers of teeth so that the rotational speed of the blade drive shaft (54) can be varied without changing the V-belt pulleys (66 and 70) or without re-tensionning of the V-belts being required. There is also disclosed an improved mounting arrangement for the engine (18) in which the engine (18) is supported on a platform (72) with vibration-dampening mountings (74) at its periphery connecting the platform (72) at its periphery to the main support structure (12) of the machine. The engine mounting arrangement and the substantially centrally located V-belt drive enables proper V-belt tensioning for maximum power transference. The engine vibration dampening arrangement helps to prevent harmful engine vibrations being transmitted to the cutting blade resulting in improved cutting efficiency. |
