# US 2020/0393003 A1 · Manufacturing method of tooth part, tooth part, and processing device of tooth part > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0393003 A1 - Document ID: US20200393003A1 - Status: Published application - Kind: A1 - Application number: 16/769,441 - Filed: 2019-01-25 - Published: 2020-12-17 - Earliest claimed: 2018-01-31 - Assignees: Aisin Aw Co., Ltd. - Applicants: Aisin Aw Co., Ltd. - Inventors: Ryo MATSUMOTO; Takuya MARUYAMA - Web page: https://patentgrep.com/patent/US20200393003A1 ## CPC - F16D 13/60: Clutching elements (friction lining or attachment thereof F16D69/00) - B21D 15/02: longitudinally - B21D 22/02: Stamping using rigid devices or tools - B21D 37/10: Die sets; Pillar guides - B21D 37/12: Particular guiding equipment, {e.g. pliers}; Special arrangements for interconnection or cooperation of dies - B21D 53/26: wheels or the like - B21D 53/28: gear wheels - B21H 5/02: with cylindrical outline {, e.g. by means of die rolls (worms B21H5/005)} - F16D 13/62: Clutch-bands; Clutch shoes; Clutch-drums (brake-bands, brake-shoes, brake-drums F16D65/00) - F16D 2250/0023: Shaping by pressure - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - B21H: MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS (essentially from sheet metal B21D) ## Abstract The tooth part includes: a tubular portion having an inner tooth portion formed on an inner peripheral surface and an outer tooth portion formed on an outer peripheral surface; a plurality of inner peripheral wall portions that each extend in an axial direction of the tubular portion and form a tooth tip portion of the inner tooth portion and a tooth bottom portion of the outer tooth portion; a plurality of outer peripheral wall portions that each extend in the axial direction and form a tooth bottom portion of the inner tooth portion and a tooth tip portion of the outer tooth portion; and an annular rib that is joined to the outer peripheral wall portions and that extends in an annular shape on an open end side with respect to the inner peripheral wall portions in the axial direction and radially outward from the inner peripheral wall portions, at an open end of the tubular portion. ## Claims ### Claim 1 A manufacturing method of a tooth part including a tubular portion, an inner tooth portion formed on an inner peripheral surface of the tubular portion, and an outer tooth portion formed on an outer peripheral surface of the tubular portion, wherein a plurality of inner peripheral wall portions that each extend in an axial direction of the tubular portion and form a tooth tip portion of the inner tooth portion and a tooth bottom portion of the outer tooth portion, a plurality of outer peripheral wall portions that each extend in the axial direction and form a tooth bottom portion of the inner tooth portion and a tooth tip portion of the outer tooth portion, and a plurality of tooth surface portions that each extend in the axial direction and connect the corresponding inner peripheral wall portion and the corresponding outer peripheral wall portion are formed in the tubular portion, and an annular rib that extends in an annular shape on a radially outer side than the inner peripheral wall portions is formed by pushing out the inner peripheral wall portions and the tooth surface portions radially outward while shearing, at an open end of the tubular portion. ### Claim 2 (depends on 1) The manufacturing method of a tooth part according to claim 1, wherein the annular rib is formed so as to extend along the outer peripheral wall portions in an annular shape by pushing out the inner peripheral wall portions and the tooth surface portions radially outward while shearing, at the open end of the tubular portion. ### Claim 3 A manufacturing method of a tooth part including a tubular portion, an inner tooth portion formed on an inner peripheral surface of the tubular portion, and an outer tooth portion formed on an outer peripheral surface of the tubular portion, wherein a plurality of inner peripheral wall portions that each extend in an axial direction of the tubular portion and form a tooth tip portion of the inner tooth portion and a tooth bottom portion of the outer tooth portion, a plurality of outer peripheral wall portions that each extend in the axial direction and form a tooth bottom portion of the inner tooth portion and a tooth tip portion of the outer tooth portion, and a plurality of tooth surface portions that each extend in the axial direction and connect the inner peripheral wall portion and the outer peripheral wall portion are formed in the tubular portion, and an annular rib that extends in an annular shape on a radially inner side than the outer peripheral wall portions is formed by pushing in the outer peripheral wall portions and the tooth surface portions radially inward while shearing, at an open end of the tubular portion. ### Claim 4 (depends on 3) The manufacturing method of a tooth part according to claim 3, wherein the annular rib is formed so as to extend along the inner peripheral wall portions in an annular shape by pushing in the inner peripheral wall portions and the tooth surface portions radially inward while shearing, at the open end of the tubular portion. ### Claim 5 A tooth part including a tubular portion, an inner tooth portion formed on an inner peripheral surface of the tubular portion, and an outer tooth portion formed on an outer peripheral surface of the tubular portion, the tooth part comprising: a plurality of inner peripheral wall portions that each extend in an axial direction of the tubular portion and form a tooth tip portion of the inner tooth portion and a tooth bottom portion of the outer tooth portion; a plurality of outer peripheral wall portions that each extend in the axial direction and form a tooth bottom portion of the inner tooth portion and a tooth tip portion of the outer tooth portion; and an annular rib that is joined to the outer peripheral wall portions and that extends in an annular shape on a radially outer side than the inner peripheral wall portions, at an open end of the tubular portion. ### Claim 6 (depends on 5) The tooth part according to claim 5, wherein the annular rib extends along the outer peripheral wall portions in an annular shape. ### Claim 7 (depends on 5) The tooth part according to claim 5, further comprising an annular side wall portion that extends radially inward from an end portion on the opposite side of the tubular portion from the open end, wherein the inner tooth portion is an internal spline to which an outer peripheral portion of a friction engagement plate of a clutch is fitted from a side of the open end. ### Claim 8 (depends on 5) The tooth part according to claim 5, further comprising an annular side wall portion that extends radially inward from the other end on the opposite side of the tubular portion from the open end, wherein the outer tooth portion is an external spline to which an inner peripheral portion of a friction engagement plate of a clutch or a brake is fitted from a side of the other end. ### Claim 9 A tooth part including a tubular portion, an inner tooth portion formed on an inner peripheral surface of the tubular portion, and an outer tooth portion formed on an outer peripheral surface of the tubular portion, the tooth part comprising: a plurality of inner peripheral wall portions that each extend in an axial direction of the tubular portion and form a tooth tip portion of the inner tooth portion and a tooth bottom portion of the outer tooth portion; a plurality of outer peripheral wall portions that each extend in the axial direction and form a tooth bottom portion of the inner tooth portion and a tooth tip portion of the outer tooth portion; and an annular rib that is joined to the inner peripheral wall portions and that extends in an annular shape on a radially inner side than the outer peripheral wall portions, at an open end of the tubular portion. ### Claim 10 (depends on 9) The tooth part according to claim 9, wherein the annular rib extends along the inner peripheral wall portions in an annular shape. ### Claim 11 (depends on 9) he tooth part according to claim 9, further comprising an annular side wall portion that extends radially inward from the other end on the opposite side of the tubular portion from the open end, wherein the outer tooth portion is an external spline to which an inner peripheral portion of a friction engagement plate of a clutch or a brake is fitted. ### Claim 12 A processing device of a tooth part including a tubular portion having an inner tooth portion formed on an inner peripheral surface and an outer tooth portion formed on an outer peripheral surface, a plurality of inner peripheral wall portions that each extend in an axial direction of the tubular portion and form a tooth tip portion of the inner tooth portion and a tooth bottom portion of the outer tooth portion, a plurality of outer peripheral wall portions that each extend in the axial direction and form a tooth bottom portion of the inner tooth portion and a tooth tip portion of the outer tooth portion, and a plurality of tooth surface portions that each extend in the axial direction and connect the corresponding inner peripheral wall portion and the corresponding outer peripheral wall portion, the processing device comprising: a plurality of dies each supporting the corresponding inner peripheral wall portion and the corresponding outer peripheral wall portion from a radially outward side; a plurality of punches each disposed radially inward from an open end of the tubular portion so as to face the corresponding inner peripheral wall portion and the corresponding tooth surface portion; and a driving mechanism that moves the punches radially outward so as to push out the corresponding inner peripheral wall portion and the corresponding tooth surface portion radially outward while shearing, while having the dies support the inner peripheral wall portion and the outer peripheral wall portion from a radially outer side. ### Claim 13 (depends on 12) The processing device of a tooth part according to claim 12, wherein the driving mechanism moves the punches radially outward so that an annular rib formed by the inner peripheral wall portions and the tooth surface portions extends along the outer peripheral wall portions in an annular shape. ### Claim 14 A processing device of a tooth part including a tubular portion having an inner tooth portion formed on an inner peripheral surface and an outer tooth portion formed on an outer peripheral surface, a plurality of inner peripheral wall portions that each extend in an axial direction of the tubular portion and form a tooth tip portion of the inner tooth portion and a tooth bottom portion of the outer tooth portion, a plurality of outer peripheral wall portions that each extend in the axial direction and form a tooth bottom portion of the inner tooth portion and a tooth tip portion of the outer tooth portion, and a plurality of tooth surface portions that each extend in the axial direction and connect the corresponding inner peripheral wall portion and the corresponding outer peripheral wall portion, the processing device comprising: a plurality of dies that each support the corresponding inner peripheral wall portion and the corresponding outer peripheral wall portion from a radially inward side; a plurality of punches each disposed radially outward from an open end of the tubular portion so as to face the corresponding outer peripheral wall portion and the corresponding tooth surface portion; and a driving mechanism that moves the punches radially inward so as to push in the corresponding outer peripheral wall portion and the corresponding tooth surface portion radially inward while shearing, while having the dies support the inner peripheral wall portion and the outer peripheral wall portion from a radially inner side. ### Claim 15 (depends on 14) The processing device of a tooth part according to claim 14, wherein the driving mechanism moves the punches radially inward so that an annular rib formed by the outer peripheral wall portions and the tooth surface portions extends along the inner peripheral wall portions in an annular shape.