Endless belt power transmission systems or components – Plural belts or plural output loads – Plural belts in series via countershaft
Patent
1996-08-05
1998-03-24
Schoeppel, Roger J.
Endless belt power transmission systems or components
Plural belts or plural output loads
Plural belts in series via countershaft
F16H 700
Patent
active
057306729
ABSTRACT:
A stepless speed change device for cutting metal-working machines includes a drive gear set, a driven gear set, an intermediate gear set and two transmission belts. Each gear set includes an upper disk and a lower disk which are inter-engageable, and a resilient seat disposed therebetween so that the upper disk and lower disk may inter-engage and the upper disk may resiliently displace to open or close an opening defined between the upper and the lower disks. The intermediate gear set includes a first adjusting gear and a second adjusting gear respectively at an upper end and a lower end thereof such that when the first adjusting gear is in an open state, the second adjusting gear is in a closed state, and two rotating devices for controlling the first and second adjusting gears to synchronously displace therewith to control the size of openings through which the transmission belts pass. The transmission belts are respectively fitted between the drive gear set and the second adjusting gear as well as between the driven gear set and the first adjusting gear. By means of the rotating devices adjusting the displacement of the transmission belt at the first and second adjusting gears, the displacement of the transmission belt at the drive gear set and the driven gear set may be adjusted to achieve stepless speed change.
REFERENCES:
patent: 2084234 (1937-06-01), Anderson et al.
patent: 2346731 (1944-04-01), Collins
patent: 2566579 (1951-09-01), Nichols
patent: 2664756 (1954-01-01), Fismer
patent: 2689620 (1954-09-01), Hainke
patent: 3153352 (1964-10-01), Sajovec et al.
patent: 3191452 (1965-06-01), Lipski et al.
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