| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability and a service life by providing an outer non- rotating auxiliary assembly having an outer housing and an outer bearing with an outer surface engaged with a cylindrical hole, and a hole formed by a spherical surface, and an inner movable auxiliary assembly having an outer surface formed of a spherical surface engaged with the outer non-rotating auxiliary assembly, and a cylindrical inner hole. SOLUTION: An outer non-rotating auxiliary assembly is in a form of pillow block housing 21 with a cylindrical hole 27, and a lubricating conduit 31 is communicated with the cylindrical hole 27. The assembly 13 has an outer bearing 41 positioned into the cylindrical hole 27. The outer bearing 41 is provided with first and second bearing segments 51, 53 separated by a space 55 communicated with the conduit 31, and having an inner rotating auxiliary assembly 15 has an inner bearing 71 having an outer surface formed of an outward spherical bearing surface to be engaged with the segments 51, 53, and a cylindrical inner hole 75. This constitution provides capacity for standing high load at an extremely small oscillating angle.
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