Difference rocking type reduction gear, the method of manufacturing the difference rocking type reduction gear, speed reducer and roller bearings

摘要

The present invention is possible to make easily fitted in the middle of the eccentric portion of the three eccentric portions along the crankshaft bearing portion, the manufacturing processes and capable of simplifying the parts management at the time of manufacturing the differential swing It provides the type speed reducer. [SOLUTION] In the differential rocking type reduction gear 10, the first eccentric portion 48a of the crankshaft 48, the second eccentric portion 48b and the third eccentric portion 48c, are arranged to have a phase difference of an angle θ with each other together, have substantially the same outer diameter d, the first bearing 49a, the second bearing 49b and the third bearing 49c is first eccentric portion 48a, substantially to the second eccentric portion 48b and the third eccentric portion 48c respectively attached to the same outer diameter, the second bearing 49b includes a plurality of rollers 50, the rollers 50 holds at a predetermined interval around the respective rollers 50 second eccentric portion 48b of the second eccentric portion 48b I and a retainer 51 for detachably held radially outwardly. .BACKGROUND