| 摘要 |
PROBLEM TO BE SOLVED: To provide a finite speed reducer capable of attaining an input side nut and an output side nut according to a characteristic required for the finite speed reducer.SOLUTION: A first rotary member running groove 11a is formed on a shaft member 1 that can be moved in an axial direction but not rotated and a second rotary member running groove 11b is also formed thereon having a larger reed than that of the first rotary member running groove 11a and having the number of strips more than that of the first one. An input side nut 2 is engaged in thread with the first rotary member running groove 11a of the shaft member 1 through a first rotary body 4a. An output side nut 3 is engaged in thread with the second rotary member running groove 11b of the shaft member 1 through a second rotary body 4b. The input side nut 2 has a first load rotary member running groove 21a opposing against the first rotary member running groove 11a of the shaft member 1 and has a plurality of first rotary member circulation circuit 23 with respect to one stripe of the first load rotary member running groove 21a.SELECTED DRAWING: Figure 3 |
