Change gear transmission

Machine element or mechanism – Gearing – Interchangeably locked

Patent

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Details

74359, F16H 308

Patent

active

042690773

ABSTRACT:
An improved simple change gear transmission having an extended range and/or number of gear ratios and minimized center distance and/or axial countershaft portion length is provided. The improved transmission utilizes a single main shaft which is pivotally mounted at one end and guided for free floating movement at the other end and at least two substantially identical countershafts which are compounded. Each countershaft has a plurality of ratio gears mounted therein which are grouped with identical ratio gears on the other countershafts. A plurality of mainshaft gears are disposed generally concentric of the mainshaft, but radially movable relative thereto and are in constant meshing engagement with and supported by the countershaft gears. Preferably, the mainshaft is floatably retained at the end thereof closest the input of the transmission while the other end thereof is mounted in a pivotal manner. The improvement comprises mounting the mainshaft gear closest the pivot point of the mainshaft, preferably the reverse mainshaft gear, radially and axially fixed relative to the mainshaft for rotative motion relative thereto, as by an anti-friction means such as a bushing or a bearing, and utilizing an idler gear assembly which is concentric with but freely floating relative to the mainshaft.

REFERENCES:
patent: 3500695 (1970-03-01), Keiser
patent: 3611823 (1971-10-01), Richards et al.
patent: 4152949 (1979-05-01), Vandervoort et al.

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