Torque fluctuation absorbing device with two hysteresis mechanisms

Torque fluctuation absorbing apparatus (1) comprising a disc (25) which is connected to a flywheel (F) to which a driving force from a drive shaft (E) is transmitted is fixed, a hub (21) on a radially inner side of the disk is disposed on an input shaft (S) of a transmission (T) is fixed, a first and a second side plate (22A, 22B) which are attached to the disc so that they between them accommodate the disc, a damper element (24), the in window portions (22C) of the first and the second side plate and portions broken away, of the hub is housed and absorbs torque fluctuations transmitted from the side plates to the hub, and first and second control plate (33A, 33B) provided at both axial sides of the hub are provided and are arranged between the first and the second side plate, respectively, wherein the first and second control plate (33A, 33B) by a stop pin (34) are riveted to maintain a predetermined distance between the first and the second control plate (33A, 33B), the torque fluctuation absorbing device further includes a first hysteresis mechanism which is arranged axially between the first control plate and the hub and between the second control plate and the hub and a first and second element of low friction (35A, 35B), wherein the first hysteresis mechanism, a small hysteresis by biasing the first and the second element with low friction in the direction of one of the control plates and the hub generates, includes a second hysteresis mechanism which is arranged axially between the first control plate and the first side plate and between the second control plate and the second side plate and a first includes and a second element of high friction (32A, 32B), said second Hyteresemechanismus generates a large hysteresis which is larger than the hysteresis generated by the first hysteresis mechanism by the first and the second element of high friction in the direction of one of the side plate n and one of the control plates to be biased, ...