Transmission shifting mechanism and force attenuator therefor

Details Transmission shifting mechanism and force attenuator therefor Transmission shifting mechanism and force attenuator therefor

1993-04-13

1994-10-25

Herrmann, Allan D.

Machine element or mechanism

Control lever and linkage systems

Multiple controlled elements

74335, 192109A, F16H 5904, F16H 6132, F16H 6134

Patent

active

053578228

ABSTRACT:
An X-Y shifting mechanism (25) is disclosed for controlling the shifting of a shift rail (17) in a first (Y-Y) transverse direction. The mechanism includes a shift finger assembly (39) including a shift finger (23). A lever member (57) is pivotable about the axis (A) of rotation. When the lever member (57) is pivoted, the movement is transmitted through a spring (91) to rotate a spring seat member (73), thus causing pivotal movement of the shift finger (23). During a non-synchronous engagement, kick-out movement causes pivotal movement of the shift finger in the opposite direction, compressing the spring (91) rather than damaging the shifting mechanism. The disclosed mechanism also enables preselection of neutral, compressing the appropriate one of the springs (91), such that the preloaded spring will move the shift finger and shift rail to the neutral position as soon as a torque break occurs.

REFERENCES:
patent: 2200013 (1940-05-01), Sanford
patent: 3921469 (1975-11-01), Richards
patent: 4425814 (1984-01-01), Dick
patent: 4428248 (1984-01-01), Broucksou et al.
patent: 4449416 (1984-05-01), Huitema
patent: 4873881 (1989-10-01), Edelen et al.
patent: 4938088 (1990-07-01), Langley et al.

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