| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a thermal rating of a drive unit by effectively cooling the drive unit of a speed reducer or the like. <P>SOLUTION: This cooling fan 110 of a speed reducer 100 mounted to an input shaft 102 for cooling a bearing casing 104 and a body casing 106 includes: a plurality of blades 112 for generating a flow of air advancing to the radial outside of the input shaft 102 by rotation of the input shaft 102; and ribs 114 each having a width in a direction crossing the blade 112 and extended toward the radial outside with respect to the center of the input shaft 102 for reinforcing each of the plurality of blades 112; wherein a tip part 114C of each rib 114 is directed to the sides of the bearing casing 104 and the body casing 106, and an inner blade part 114A exists on the radial inside of each rib 114. <P>COPYRIGHT: (C)2011,JPO&INPIT |
