Method for manufacturing an overrunning clutch
AssigneeMitsubishi Electric Corporation
InventorsKoichiro Kamei, Kazuhiro Odahara, Hidekazu Katayama, Jiro Hirao
Life of this patent
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Abstract
Rollers and springs are installed in notch portions of a clutch outer (S104), an inscribed circle diameter of the rollers is measured in a state in which the rollers are placed in contact with stopping portions by pressure from the springs (S105), and an outside diameter of a cylindrical portion is determined from the inscribed circle diameter measured value such that a predetermined amount of roller bite is achieved (S106). Then, the outside diameter of the cylindrical portion is finished so as to have the determined value of the outside diameter (S108). An overrunning clutch is assembled by pairing together the clutch outer, rollers, and springs and the clutch inner (S110).
Claims16
A method for manufacturing an overrunning clutch including
- a tubular clutch outer with a plurality of tapered notch portions formed circumferentially on an inner circumferential portion,
- a clutch inner having a cylindrical portion disposed at a first end, said cylindrical portion being inserted into said inner circumferential portion of said clutch outer such that wedge-shaped spaces are formed between an outer circumference of said cylindrical portion and said notch portions,
- rollers mounted into said wedge-shaped spaces so as to be movable circumferentially,
- springs that press said rollers toward narrow ends of said wedge-shaped spaces, and
- stopping portions that are disposed on said inner circumferential portion of said clutch outer so as to project inward at narrow end positions of each of said wedge-shaped spaces,
- wherein a driving force is transmitted from said clutch outer through said rollers to said clutch inner by unidirectional rotation,
- said method comprising:
- installing said rollers and said springs in each of said notch portions of said clutch outer;
- measuring an inscribed circle diameter of said rollers at two or more positions that differ in an axial direction of said rollers in a state in which said rollers are respectively placed in contact with said stopping portions by pressure from said springs;
- and
- determining an outside diameter of said cylindrical portion from a measured value of said inscribed circle diameter such that an amount of roller bite is at a predetermined amount at a position at which said rollers come into contact with said stopping portions.
An overrunning clutch, comprising:
- a tubular clutch outer that has a plurality of tapered notch portions formed circumferentially on an inner circumferential portion;
- a clutch inner that has a cylindrical portion disposed at a first end, said cylindrical portion being inserted into said inner circumferential portion of said clutch outer such that wedge-shaped spaces are formed between an outer circumference of said cylindrical portion and said notch portions;
- rollers that are mounted into said wedge-shaped spaces so as to be movable circumferentially;
- springs that press said rollers toward narrow ends of said wedge-shaped spaces;
- and
- stopping portions that are disposed on said inner circumferential portion of said clutch outer so as to project inward at narrow end positions of each of said wedge-shaped spaces,
- wherein a driving force is transmitted from said clutch outer through said rollers to said clutch inner by unidirectional rotation,
- further wherein an outside diameter of the cylindrical portion is based on a measured value of an inscribed circle diameter of said rollers when said rollers contact said stopping portions by pressure from said springs, such that an amount of roller bite is at a predetermined amount at a position at which said rollers contact said stopping portions, and
- wherein said inscribed circle diameter comprises two or more measurement positions that differ in an axial direction of said rollers in said state in which each of said rollers is placed in contact with said stopping portions by pressure from said springs.
Dependencies are inferred from the claim text.