초록 ▼

A V-belt variable-speed drive has a driving shaft; a stationary sheave fixedly mounted on the driving shaft; a sliding sheave assembly including a sliding sheave facing the stationary sheave and a casing covering the backside of the sliding sheave and designed to slide in the axial direction of the

A V-belt variable-speed drive has a driving shaft; a stationary sheave fixedly mounted on the driving shaft; a sliding sheave assembly including a sliding sheave facing the stationary sheave and a casing covering the backside of the sliding sheave and designed to slide in the axial direction of the driving shaft, though normally urged to be set apart from the stationary sheave; self-sliding bearings for mounting the sliding sheave and casing on the driving shaft; a rotation-transmitting unit fixed to the driving shaft to transmit its rotation to the sliding sheave assembly while allowing the sliding sheave assembly to slide in the axial direction of the driving shaft; and a sliding sheave assembly-displacing unit for steplessly varying the rotating speed of a driven shaft by adjusting an interval between the stationary and sliding sheaves and regulating the radial position of the V-belt lying between both sheaves in accordance with the rotating speed of the driving shaft, wherein application of the self-aligning type bearings enables the sliding sheave assembly to be smoothly shifted in the axial direction of the driving shaft even when the V-belt applies a localized reaction force to the sliding sheave.

대표청구항 ▼

A V-belt variable-speed drive comprising: a driving shaft; a stationary sheave concentrically fixed to said driving shaft; sliding sheave means having a sliding sheave facing the stationary sheave and supported by at least two central portions penetrated by the driving shaft, said central portions h

A V-belt variable-speed drive comprising: a driving shaft; a stationary sheave concentrically fixed to said driving shaft; sliding sheave means having a sliding sheave facing the stationary sheave and supported by at least two central portions penetrated by the driving shaft, said central portions having a spherical inner surface; at least two bearings mounted on the driving shaft and being slideable axially thereof, each of the bearings having a cylindrical inner surface which contacts the outer surface of tHe driving shaft and each of the bearings having a spherical outer surface shaped complementary to the inner surfaces of said central portions of the sliding sheave means, the complementary spherical outer surface of the respective bearings being concentered as the spherical surfaces of said central portions of the sliding sheave means, and said bearings being inserted into the corresponding central portions of the sliding sheave means with the sperical outer surface of said bearings being contacted by the spherical inner surface of the corresponding central portions; an endless belt passing between the stationary sheave and the sliding sheave; rotation-transmitting means disposed between the driving shaft and the sliding sheave means to transmit the rotation of the driving shaft to the siding sheave; displacing means disposed between the driving shaft rotation-transmitting means and the sliding sheave means to draw the sliding sheave nearer to the stationary sheave as the driving shaft is rotated at a more accelerated speed; and urging means for urging the sliding sheave in the direction in which the sliding sheave is separated from the stationary sheave.