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US 2022/0324509 A1Published application
Worm wheel of steering system speed reducer, and manufacturing method therefor
AssigneeMando Corporation
InventorJong Han KIM
Life of this patent
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AssigneeMando Corporation
InventorJong Han KIM
Estimating the term…
The present embodiments relate to a worm wheel of a steering system speed reducer, and provide a worm wheel of a steering system speed reducer, and a manufacturing method therefor, the worm wheel comprising: an external toothed part having a ring shape, external gear teeth provided on the outer peripheral side thereof, insertion grooves provided on the inner peripheral side thereof, and coupling holes provided on the upper surface and/or the lower surface thereof; an internal toothed part, which has a ring shape, is inserted into the external toothed part, has insertion protrusions provided on the outer peripheral side thereof, and has coupling protrusions provided at locations corresponding to the coupling holes; a hub to which a steering shaft is coupled; and a boss part provided between the outer peripheral side of the hub and the inner peripheral side of the external toothed part.
A worm wheel of a steering device reducer, comprising:
A method for manufacturing a worm wheel of an electromotive steering device, forming an inner toothed part, which has insertion protrusions radially formed on an outer circumferential side thereof and fixing protrusions radially formed on an inner circumferential side thereof and a coupling protrusion formed in an upper or lower direction thereof, by stacking, one over another, an upper plate mold formed with a space for receiving an upper end of the inner toothed part, a middle plate mold formed with a space formed to receive a lower end of the inner toothed part and a through hole penetrating a lower surface to form the coupling protrusion, and a lower plate mold tightly contacting a lower surface of the middle plate mold to close the through hole, and filling the space and the through hole with a plastic resin.
Dependencies are inferred from the claim text.