Lock-up device for torque converter
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United States of America Patent
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May 2, 2017
Grant Date -
Nov 12, 2015
app pub date -
Mar 18, 2014
filing date -
Mar 21, 2013
priority date (Note) -
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Abstract
A lock-up device for a torque converter is provided in which torsion springs are appropriately compressed and deformed even when the torsion springs to be used have a shape elongated in a circumferential direction of the lock-up device. The lock-up device includes a drive plate, torsion springs and a driven plate. The drive plate has a fixation part, a plurality of torque transmission parts and a plurality of receiver parts. The fixation part is fixed to a piston. The plural torque transmission parts are formed to extend from the fixation part to an outer peripheral side and contact rotation-directional ends of the torsion spring. The plural receiver parts are formed on an outer peripheral part of the fixation part, support the inner peripheral side parts of the torsion springs on an engine side with respect to the axial centers of the torsion springs, and extend toward a transmission.
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