US 12,422,021 B2
Power transmission pin for speed changer, speed changer and method of manufacturing power transmission pin for speed changer
Yoshiaki Makizoe, Tokyo (JP); and Kazuyoshi Makisumi, Tokyo (JP)
Assigned to NABTESCO CORPORATION, Tokyo (JP)
Filed by Nabtesco Corporation, Tokyo (JP)
Filed on Jul. 25, 2024, as Appl. No. 18/784,063.
Claims priority of application No. 2023-129120 (JP), filed on Aug. 8, 2023.
Prior Publication US 2025/0052300 A1, Feb. 13, 2025
Int. Cl. F16H 1/32 (2006.01); C23C 8/26 (2006.01)
CPC F16H 1/32 (2013.01) [C23C 8/26 (2013.01); F16H 2001/325 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power transmission pin for a speed changer, the power transmission pin being used in a speed changer and configured to transmit power, the speed changer including a speed changing mechanism configured to receive rotation input thereto, change a speed of the rotation, and output the speed-changed rotation, the power transmission pin comprising:
a shaft portion; and
an externally threaded portion configured to fixedly attach the shaft portion onto the speed changing mechanism, the externally threaded portion being formed on an end of the shaft portion in an axial direction, the externally threaded portion and the shaft portion being coaxially arranged,
wherein at least a surface of the shaft portion has higher hardness than the externally threaded portion.