| 摘要 |
A drive power transmission system includes-a clutch hub, a clutch drum and a dry clutch. The dry clutch includes-first and second clutch plates, a friction facing and a cover member. The first clutch plate is joined to the clutch hub. The second clutch plate is joined to the clutch drum. The cover member has an external air intake hole and an external air discharge hole. These holes of the cover member are positioned such that, due to rotation of at least one of the clutch hub and the clutch drum, an air flow is generated that draws external air is through the external air intake hole and along the clutch hub to a radially inward location of reduced air pressure, then passes radially outward to a radially outward location of increased air pressure, and then passes along the clutch drum and out the external air discharge hole. |
| 主权项 |
1. A drive power transmission system comprising:
a clutch hub; a clutch drum arranged with respect to the clutch hub to partially defining a sealed space; and a dry clutch configured to disconnect transmission of drive power, the dry clutch being disposed inside the sealed space, the dry clutch comprising: a first clutch plate that is joined by first splines to the clutch hub; a second clutch plate that is joined by second splines to the clutch drum; a friction facing that is provided on at least one of the first and second clutch plates, a friction surface pressing against the other plate face during clutch engagement; and a cover member partially defining the sealed space, the cover member having an external air intake hole through which external air enters into the sealed space and an external air discharge hole through which the air flow exits from inside the sealed space to the external air, the external air intake hole being disposed on a side face of the dry clutch so as to pass axially through radially inwardly from the two clutch plates, and the external air discharge hole being provided on the cover member disposed on a side face of the dry clutch so as to pass axially through radially outwardly from the two clutch plates, the external air intake hole and the external air intake hole of the cover member being positioned with respect to the clutch hub and the clutch drum such that, due to rotation of at least one of the clutch hub and the clutch drum, an air flow is generated in an axial direction in which external air is drawn through the external air intake hole along the clutch hub to a radially inward location of reduced air pressure adjacent the clutch hub, then the air flow is directed radially outward to a radially outward location of increased air pressure adjacent the clutch drum, and then the air flow is directed along the clutch drum and passes through the external air discharge hole to the external air. |
