Single shaft shifting mechanism
AssigneeEaton Corporation
InventorsPatrick L. Brown, Michael J. Huggins, Joseph D. Reynolds, Daniel M. Armock
Life of this patent
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Abstract
An improved single shift shaft shifting mechanism (300) for shifting a mechanical change-gear transmission (10/110) is provided. The shifting mechanism includes a shift shaft (302) which is mounted for axial and rotational movement in a housing (H) for selectively axially moving and/or locking selected or non-selected, respectively, shift forks (302, 304, 306) relative to the housing. To provide an easily shifted, reliable and economical assembly, the shifting projections are defined by a plurality of generally annular shift pins (316, 318, 320) extending radially from bores (322, 324, 326) provided in the shift shaft (308).
Claims23
A single shift shaft mechanism for axially positioning a selected one of two or more selectable engagement members while axially fixing the non-selected ones of said engagement members to a housing, said mechanism comprising a single shift shaft having an outer surface axially and rotationally movable in the housing, shift means axially and rotationally fixed to and extending radially from said outer surface, and interlock means having a first portion rotationally fixed to said shaft and a second portion axially fixed to said housing;
- said mechanism characterized by:
- at least one of said shift means and said interlock means comprising a plurality of individual pins, at least one pin for each engagement member, extending radially outwardly from said outer surface.
A single shaft shifting mechanism for selection and engagement of selectable gear ratios in a change speed transmission including a housing, said mechanism comprising a shift shaft mounted for relative axial and rotational movement in said housing and defining an outer surface, a shift block member axially and rotationally connected to said shaft, a plurality of shift forks including sleevelike hub portions having an axially extending through bore and a pair of opposed strike surfaces extending generally perpendicular to the axis of said shaft, a set of shift members projecting radially outwardly from said shaft in an axially-spaced relationship such that each of said hub portions cooperates with a different one of said shift members, said shift members being axially and circumferentially fixed relative to said shaft, a set of interlocking teeth projecting radially from said shaft in an axially-spaced relationship such that each of said hub portions is arranged between two adjacent teeth of said set of interlocking teeth, said set of interlocking teeth being axially movable but circumferentially fixed relative to said shaft and axially fixed relative to said housing, each of said hub portions having at least one pair of axially extending grooves being formed to receive a corresponding one of said shift members and interlocking teeth, said grooves being arranged in predetermined positions along the through bores of said hubs such that when one of said grooves of one of said hubs is aligned with a corresponding one of said interlocking set of teeth, none of the grooves in said hub is aligned with one of said shifting members and one of said grooves of each hub portion other than said one hub portion is aligned with a corresponding one of said shifting members and none of the grooves of each of said hub portions other than said one hub portion is aligned with one of said set of interlocking teeth, said shifting mechanism characterized by:
- said shift members comprise generally annular shift pins, at least one for each hub portion, extending radially from said shaft and said interlock teeth are defined by a single interlock key slidably received in an axially extending interlock keyway provided in said shaft.
Dependencies are inferred from the claim text.