Under-frame structure
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United States of America Patent
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Jan 9, 2001
Grant Date -
N/A
app pub date -
Nov 17, 1998
filing date -
Apr 24, 1998
priority date (Note) -
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Abstract
The car under-frame of the invention comprises a planar coupling member 2 projecting from a first car C toward a second car B, a bearing inner ring 3 positioned on the upper side of planar coupling member 2 and secured rigidly thereto, a bearing outer ring 6 disposed on the outer peripheral side of bearing inner ring 3 through balls, a bearing step 5 positioned on the upper side of bearing outer ring 6 and to which the bearing outer ring is rigidly secured, and an articular coupling member 7 projecting from the second car B toward the first car C to grip a mounting arm 5b of bearing step 5. The mounting arm 5b of bearing step 5 is integral with a generally discoid body segment 5a and disposed below the top end face of body segment 5a and extending radially outwardly from either side of body segment 5a. In accordance with the invention there can be provided a under-frame structure which makes it possible to lower the car floor level without interfering with strength and coupler performance.
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