Document Type and Number:
Japanese Patent JPWO2021014647
Kind Code:
A1
Abstract:
A planetary reduction gear (1) using a helical gear is configured such that a rear-stage sun gear (21) is rotatably supported by a device housing (2) via a radial bearing (15) on one side in the direction of a center axis (1a), and is rotatably supported by a rear-stage planetary carrier (23) via a thrust bearing (30) on the other side. The rear-stage planetary carrier (23) is rotatably supported by the device housing (2) via a rear-stage carrier bearing (25). A preload is applied to the thrust bearing (30) by a preload mechanism (40) mounted to the rear-stage planetary carrier (23). Displacement of the rear-stage sun gear (21) caused by a thrust force generated due to engagement with a rear-stage planetary gear (22) can be suppressed, and an angle error between input rotation and output rotation can be suppressed.
Application Number:
JP2021534516A
Publication Date:
January 28, 2021
Filing Date:
July 25, 2019
Export Citation:
