Described are an oscillation amplitude control component, home electrical equipment and an oscillation amplitude control method and device. The component includes: a V-shaped grooved gear, a pressure pump, a roller with a pre-formed groove and a transmission belt; the V-shaped grooved gear includes a central shaft and two frustoconical members mounted on the central shaft; lateral surfaces of two frustoconical members and the central shaft enclose a V-shaped groove; a gear is arranged on a circumference of a frustoconical member, and joined with an oscillating switch selectively; the transmission belt is configured to surround the V-shaped groove and the pre-formed groove; two frustoconical members regulate a surrounding radius of the transmission belt surrounding the V-shaped groove under control of pressure generated by the pressure pump; and the roller is fixed in an oscillating plate, and controls an oscillation amplitude of the home electrical equipment through the oscillating plate.

Described are an oscillation amplitude control component, home electrical equipment and an oscillation amplitude control method and device. The component includes: a V-shaped grooved gear, a pressure pump, a roller with a pre-formed groove and a transmission belt; the V-shaped grooved gear includes a central shaft and two frustoconical members mounted on the central shaft; lateral surfaces of two frustoconical members and the central shaft enclose a V-shaped groove; a gear is arranged on a circumference of a frustoconical member, and joined with an oscillating switch selectively; the transmission belt is configured to surround the V-shaped groove and the pre-formed groove; two frustoconical members regulate a surrounding radius of the transmission belt surrounding the V-shaped groove under control of pressure generated by the pressure pump; and the roller is fixed in an oscillating plate, and controls an oscillation amplitude of the home electrical equipment through the oscillating plate.

A variety of transmission mechanisms are provided that include radially inverted pulleys that are nested within each other or otherwise overlap in order to exert inward forces onto a compressive belt that transmits power between the pulleys. By exerted forces inward onto the belt, the belt can be subjected to net compression everywhere along its length. This allows the belt to be less complex and to have a lower cost than belts of transmissions that exert forces outward from pulleys onto a belt, thus requiring expensive and technically challenging belt packs or other elements to sustain the longitudinal tensions experienced by such belts, even when such belts are operated as push belts. Transmissions that include such radially inverted pulleys can exhibit reduced size and cost and increased power capacity compared to transmissions that employ non-radially inverted pulleys.

A variety of transmission mechanisms are provided that include radially inverted pulleys that are nested within each other or otherwise overlap in order to exert inward forces onto a compressive belt that transmits power between the pulleys. By exerted forces inward onto the belt, the belt can be subjected to net compression everywhere along its length. This allows the belt to be less complex and to have a lower cost than belts of transmissions that exert forces outward from pulleys onto a belt, thus requiring expensive and technically challenging belt packs or other elements to sustain the longitudinal tensions experienced by such belts, even when such belts are operated as push belts. Transmissions that include such radially inverted pulleys can exhibit reduced size and cost and increased power capacity compared to transmissions that employ non-radially inverted pulleys.

A stepless transmission transmits a driving force by an endless transmission member (5) wound around a V-groove (6) of an input pulley (1). The input pulley (1) has moving parts (9) which are fastened by threaded engagement so as to be axially movable with respect to a transmission case (3) and have ring gears (10), to which rotation can be input from the outer periphery sides, and pulley half discs (13) which are relatively rotatable with respect to the moving parts (9), which axially move integrally with the moving parts (9) and which are contactable with an endless transmission member (5). The pulley half discs (13) and an input shaft 2, which is disposed at the center of the pulley half discs (13), rotate together as one piece. The ring gears (10) are each rotationally driven from a drive source of the same drive member.

A stepless transmission transmits a driving force by an endless transmission member (5) wound around a V-groove (6) of an input pulley (1). The input pulley (1) has moving parts (9) which are fastened by threaded engagement so as to be axially movable with respect to a transmission case (3) and have ring gears (10), to which rotation can be input from the outer periphery sides, and pulley half discs (13) which are relatively rotatable with respect to the moving parts (9), which axially move integrally with the moving parts (9) and which are contactable with an endless transmission member (5). The pulley half discs (13) and an input shaft 2, which is disposed at the center of the pulley half discs (13), rotate together as one piece. The ring gears (10) are each rotationally driven from a drive source of the same drive member.

An infinitely variable transmission system for differentially steered vehicles comprises two planetary gearboxes, each coupled to drive, as output, a driving component, such as track or wheel, on either side of a vehicle. The planetary gearboxes are drivingly coupled to a power source, such as an engine or motor, via fixed gear ratio driver and via belt drive system of two or more variable ratio belt drive pulleys. Each of the two outputs of the transmission can independently and simultaneously be controlled to revolve in forward, neutral (stop), and reverse directions in a manner of continuously and infinitesimally variable speed and torque.

An infinitely variable transmission system for differentially steered vehicles comprises two planetary gearboxes, each coupled to drive, as output, a driving component, such as track or wheel, on either side of a vehicle. The planetary gearboxes are drivingly coupled to a power source, such as an engine or motor, via fixed gear ratio driver and via belt drive system of two or more variable ratio belt drive pulleys. Each of the two outputs of the transmission can independently and simultaneously be controlled to revolve in forward, neutral (stop), and reverse directions in a manner of continuously and infinitesimally variable speed and torque.

A continuously variable transmission including a first pulley means, a second pulley means and an elongate, flexible endless transmission element that is passed over both the first pulley means and the second pulley means, wherein the first pulley means include two sheaves which are adjustable in an axial direction of the first rotation axis line, and an adjusting means for moving the two adjustable sheaves toward and away from each other in the axial direction for setting an operative radius of the first pulley means at which the transmission element is passed over the first pulley means, wherein the first pulley means is provided with alignment means for causing the two movable sheaves to jointly move additionally in the axial direction of the first rotation axis under the influence of a force exerted in axial direction on the first pulley means by the transmission element while maintaining the operative radius.

A work vehicle having a belt type stepless speed changing mechanism includes a rotation detecting section for detecting an engine rotational speed, a vehicle speed detecting section for detecting a vehicle speed of a traveling vehicle body and an informing section configured to effect an alarm informing for alarming wear of a drive belt if a vehicle speed detected by the vehicle speed detecting section is a predetermined vehicle speed deviates from a preset permissible range.