US 12,276,327 B2
Toothed pulley
Ayumi Yamamori, Aichi (JP); Masayoshi Nakamura, Osaka (JP); Mitsuru Saitoh, Osaka (JP); and Nobumasa Oka, Osaka (JP)
Assigned to JTEKT CORPORATION, Aichi (JP); and NAKANISHI METAL WORKS CO., LTD., Osaka (JP)
Filed by JTEKT CORPORATION, Aichi (JP); and NAKANISHI METAL WORKS CO., LTD., Osaka (JP)
Filed on Jan. 13, 2022, as Appl. No. 17/647,873.
Claims priority of application No. 2021-004734 (JP), filed on Jan. 15, 2021; and application No. 2021-004735 (JP), filed on Jan. 15, 2021.
Prior Publication US 2022/0228656 A1, Jul. 21, 2022
Int. Cl. F16H 55/17 (2006.01)
CPC F16H 55/171 (2013.01) 5 Claims
OG exemplary drawing
 
1. A toothed pulley comprising:
a cylindrical metallic core having an outer peripheral surface and an open interior, and
a resin portion including teeth, wherein
the cylindrical metallic core has, at a first end thereof in an axial direction parallel to a rotation axis of the toothed pulley, a bottom plate, the bottom plate extending from the outer peripheral surface inward toward the axis of rotation of the toothed pulley,
the cylindrical metallic core has, at a second end thereof in the axial direction, a first outward flange projecting outward in a radial direction,
the first outward flange has a radially outer peripheral surface extending radially beyond the outer peripheral surface of the cylindrical metallic core, the first outward flange defined by a plurality of first portions alternating with a plurality of second portions, the plurality of first portions having a first radially outer peripheral surface defining a portion of a cylindrical surface, the plurality of second portions having a second radially outer peripheral surface recessed radially inward from the cylindrical surface, the first radially outer peripheral surface and the second radially outer peripheral surface defining the outer peripheral surface of the first outward flange,
the cylindrical surface is concentric with a rotational axis of the toothed pulley,
the cylindrical metallic core, including the outer peripheral surface and the radially outer peripheral surface of the first outward flange is covered by molten thermoplastic resin that is cooled to form the resin portion, wherein the cylindrical metallic core is an insert article within the resin portion,
the bottom plate of the metallic core has a plurality of attachment holes and a plurality of through holes which the resin portion enters,
the resin portion has a bottom plate at one end thereof in the axial direction,
the bottom portion of the resin portion extends axially beyond the bottom plate of the metallic core and is disposed at least partially axially adjacent the bottom plate of the metallic core, and
the bottom plate of the resin portion is provided with a notch that provides axial exposure of each of the plurality of attachment holes in the bottom plate of the metallic core.