Method of forming a shaft fixing aperture in a plate-like carryi

Details Method of forming a shaft fixing aperture in a plate-like carryi Method of forming a shaft fixing aperture in a plate-like carryi

1998-03-16

2000-02-15

Echols, P. W.

Metal working

Method of mechanical manufacture

Shaping one-piece blank by removing material

475331, B23P 1304

Patent

active

060238364

ABSTRACT:
Automatic transmissions of automobiles and the like often employ planetary gear mechanisms. In conventional planetary gear mechanisms, a carrier is utilized for supporting shafts of a pinion or planetary gear. One of the carriers is provided with fixing apertures that position and prevent rotation of the pinion shafts of the pinion or planetary gears coupled thereto. The carrier with the fixing apertures is manufactured by pressing a sheet metal member into the desired shape such that one radially extending surface has a plurality of first cavities. These first cavities are preferably rectangular. After the sheet material is pressed, a plurality of second apertures or cavities is formed on the opposite radially extending facing surface of the sheet metal. These second cavities are preferably circular. These second cavities overlap with the first cavities such that a passageway is formed between the first and second cavities. The shafts of the pinion or planetary gears have a D-shaped projection with a flat area for engaging a flat area of the first cavities such that rotation between the carrier and the pinion shafts are prevented.

REFERENCES:
patent: 4474278 (1984-10-01), Miura
patent: 4597479 (1986-07-01), Kitano et al.
patent: 4664240 (1987-05-01), Majima et al.
patent: 4756212 (1988-07-01), Fuehrer
patent: 4924978 (1990-05-01), Ohkubo
patent: 4942779 (1990-07-01), Ohkubo
patent: 5593015 (1997-01-01), Kosumi et al.

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