Compound variable mechanical advantage shifting mechanism

Details Compound variable mechanical advantage shifting mechanism Compound variable mechanical advantage shifting mechanism

1982-11-08

1985-05-07

Herrmann, Allan D.

Machine element or mechanism

Gearing

Interchangeably locked

74 97, 74470, 74473R, 74516, 74520, 192 53E, 192 99S, 192109A, G05G 918, G05G 704, F16D 2306

Patent

active

045150290

ABSTRACT:
A variable mechanical advantage/variable effective length shifting mechanism (30) is provided, preferably for shifting a synchronized positive clutch transmission. A compound mechanism comprises a first member (34) in the form of a variable mechanical advantage/variable effective length first class lever having a first lever portion (34), a second lever portion (42) and a fixed pivot axis (38), and a second member (44) in the form of a second class lever pivotably mounted about a pivot axis (70) extending substantially parallel to and spaced from the first pivot axis. A pivot pin (48) extending substantially parallel to the first and second pivot axis is slidably received in axially extending slots (46 and 84) provided in the first and second members, respectively. A resilient biasing member (58) is provided for resiliently biasing the pivot pin axially away from the first pivot axis and axially toward the second pivot axis. The pivot pin may overcome the bias of the biasing member to move toward the first pivot axis and away from the second pivot axis to increase the mechanical advantage of the compound mechanism by increasing the mechanical advantage of both the first class lever member and the second class lever member. The second class second member carries a shift finger (32) for pivotal movement therewith about the second pivot axis.

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patent: 4073199 (1978-02-01), Simons
patent: 4104929 (1978-08-01), Kessmar
patent: 4266438 (1981-05-01), Kessmar

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