公开(公告)号：US20230243416A1

公开(公告)日：2023-08-03

申请号：US18103682

申请日：2023-01-31

Applicant: NACHI-FUJIKOSHI CORP.

Inventor： Gaku KOSAKI ,  Takaya YOKOTA

IPC: F15B15/02 ,  F15B15/20 ,  F16H57/08 ,  F16H57/00

CPC classification number: F15B15/02 ,  F15B15/20 ,  F16H57/0025 ,  F16H57/082 ,  F15B2215/30 ,  F16H2001/324

Abstract: Object: To provide a planetary gear mechanism with a free-wheel mechanism that can prevent seizing of a thrust plate and can increase the degree of freedom in setting of a gear ratio. Means to Solve the Problem: A planetary gear mechanism 100 is a planetary gear mechanism with a free-wheel mechanism for reducing the output of a hydraulic motor 104 and transmitting the reduced output. The planetary gear mechanism 100 includes: a housing 108 configured to be decelerated and rotated; a cover 128 that seals an end surface 126 of the housing; a sun shaft 132 configured to be splined to a motor shaft 106 of the hydraulic motor; a first sun gear 142 formed in one piece with the sun shaft; a first planetary gear 144 meshed with the first sun gear; a carrier 146 that supports a shaft 148 of the first planetary gear; a thrust plate 160 that is disposed toward the cover relative to the first planetary gear, and is configured to restrict a movement of the carrier; a hole 164 that is formed in the thrust plate and through which the first sun gear can be passed; a maintenance hole 166 that is formed in the cover and through which the first sun gear can be passed; and a plug 162 configured to close the maintenance hole.