| 摘要 |
Disclosed herein is a lawn mower including a friction drive comprising a clutch disc connected to a driving engine, a clutch plate mounted in facing relation to the clutch disc and for clutch plate rotation co-axially with and independently of the clutch disc, as well as for axial movement relative to a position in engagement with the clutch disc, together with a roller which is drivingly connected to a mower drive wheel, which includes a circular periphery, and which is mounted for rotation about an axis transverse to the clutch disc and plate axis and for translation about another axis parallel to the roller axis into a position engaging the roller periphery with the clutch plate in such manner as to more or less also simultaneously engage the clutch plate with the clutch disc. In addition, there is disclosed means biasing the roller toward the clutch disc, whereby to engage the roller periphery with the clutch plate and to engage the clutch plate with the clutch disc, and means operable by a user for controlling movement of the roller relative to the position engaging the roller periphery with the clutch plate.
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