Fig. 3 is a structural view of a three-stage torsional vibration damper. The hub 8 is a connection between the torsional vibration damper and the crankshaft. One side of the rubber members 2, 6 and 10 is vulcanized together with the hub 8, and the other side is vulcanized together with the inertia rings 1, 5 and 11, respectively. The friction ring 4 is made of a Teflon material, so that the ring gears 4, 5 can rotate relative to each other. The inertia ring 1 and the rubber member 2, the inertia ring 5 and the rubber member 6, the inertia ring 11 and the rubber member 10 constitute a three-stage parallel torsional vibration damper.
2. Two-stage series torsional vibration damper
Figure 4 is a structural view of a two-stage series torsional vibration damper. The hub 7 is a connecting member of the torsional vibration damper and the front end of the crankshaft, and the connection between the inertia rings 5 ​​and 1 is a tight fit, and the two constitute an inertial mass. One side of the rubber member 6 is vulcanized together with the hub 7, and the other side is vulcanized together with the inertia ring 1. One side of the rubber member 2 is vulcanized together with the inertia ring 1, and the other side is vulcanized together with the inertial mass 3. The friction ring 4 is a steel ring made of a Teflon material, so that the pulley 3 and the friction ring 4 can rotate with each other.
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