Title:
伝動装置
Document Type and Number:
Japanese Patent JP7353827
Kind Code:
B2
Abstract:
A power transmission device has a hub portion of a ring gear is fixed by a weld portion to a flange portion on an outer periphery of a transmission member, an annular groove that is recessed in the inner side of the axial direction is formed in a side face of the hub portion for making axial positions of the annular groove and the cavity part partially coincide with each other, the hub portion is narrowed partway along a part sandwiched between the cavity part and weld portion and the annular groove when viewed in a cross section transecting the annular groove, and a narrowed portion is set to have a thickness that alleviates residual stress produced around the weld portion of the flange portion by the force with which the flange portion and the hub portion pull each other in response to thermal shrinkage of the weld portion.
Inventors:
Akihiro Uchida
Akuto Sekiguchi
Tetsuya Okabe
Akuto Sekiguchi
Tetsuya Okabe
Application Number:
JP2019122190A
Publication Date:
October 02, 2023
Filing Date:
June 28, 2019
Export Citation:
Assignee:
Musashi Seimitsu Industry Co., Ltd.
International Classes:
F16H55/17; F16H48/08; F16H48/40
Domestic Patent References:
| JP5234185B2 | ||||
| JP2016188657A |
Foreign References:
| WO2012039014A1 | ||||
| WO2017050375A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Ochiai Patent Office