To provide a power transmission device which can suppress vibration of a belt and can easily manufacture the belt.SOLUTION: A power transmission device includes: a driving pulley; a driven pulley; and a belt wound on the driving pulley and the driven pulley. A first rotary shaft to be a rotary shaft of the driving pulley is inclined to a second rotary shaft to be a rotary shaft of the driven pulley when viewed from an orthogonal direction with respect to the first rotary shaft. A cross section obtained by cutting the belt at a position between the driving pulley and the driven pulley is defined as a first cross section on a plane orthogonal to a longitudinal direction of the belt. A cross section obtained by cutting the belt at a position which is between the driving pulley and the driven pulley and is different from the first cross section is defined as a second cross section on the plane orthogonal to the longitudinal direction of the belt. In this case, an outer peripheral surface of the belt is recessed in the first cross section and the second cross section. The position of the bottom of the outer peripheral surface of the belt in the second cross section is deviated from the position of the bottom of the outer peripheral surface of the belt in the first cross section.SELECTED DRAWING: Figure 5
【課題】ベルトの振動を抑制でき且つ容易に製造できる動力伝達装置を提供すること。【解決手段】動力伝達装置は、駆動プーリと、従動プーリと、駆動プーリ及び従動プーリに巻きかけられるベルトと、を備える。駆動プーリの回転軸である第1回転軸は、第1回転軸に対する直交方向から見た場合、従動プーリの回転軸である第2回転軸に対して傾斜している。ベルトの長手方向に対して直交する平面で、駆動プーリと従動プーリとの間の位置でベルトを切った断面を第1断面とする。ベルトの長手方向に対して直交する平面で、駆動プーリと従動プーリとの間の位置であって第1断面とは異なる位置でベルトを切った断面を第2断面とする。この場合、第1断面及び第2断面において、ベルトの外周面は、凹状である。第2断面におけるベルトの外周面の底の位置は、第1断面におけるベルトの外周面の底の位置に対してずれている。【選択図】図5
POWER TRANSMISSION DEVICE AND ELECTRIC POWER STEERING DEVICE
動力伝達装置及び電動パワーステアリング装置
2020-09-17
Patent
Electronic Resource
Japanese
POWER TRANSMISSION DEVICE AND ELECTRIC POWER STEERING DEVICE
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