Damper device and starting device

Abstract

This damper device includes an input element through which torque from an engine is transferred, an output element, a first intermediate element, a second intermediate element, a first elastic body that transfers torque between the input element and the first intermediate element, a second elastic body that transfers torque between the first intermediate element and the output element, a third elastic body that transfers torque between the input element and the second intermediate element, a fourth elastic body that transfers torque between the second intermediate element and the output element, and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element. The third and fourth elastic bodies are positioned to the outside of the first and second elastic bodies in a radial direction of the damper device. The fifth elastic body is positioned to the outside of the first and second elastic bodies in the radial direction and with agap between the fifth elastic body and the third and fourth elastic bodies in an axial direction of the damper device. The fifth elastic body, when viewed from the axial direction, at least partiallyoverlaps with the third and fourth elastic bodies in the radial direction.

Description

technical field [0001] The invention relates to a vibration damping device and a starting device. Wherein, the shock absorbing device has an input member and an output member, and the above input member is transmitted with torque from the engine, and the starting device includes a pump wheel, a turbine and a shock absorbing device. Background technique [0002] Conventionally, a two-channel damper used in connection with a torque converter is known as a damper device applicable to a starting device (for example, refer to Patent Document 1). In this damping device, the vibration path from the engine and the lock-up clutch (32) to the output hub (37) is divided into two parallel vibration paths B and C, and the two vibration paths B and C are respectively There is a pair of springs and a separate intermediate flange (36, 38) disposed between the pair of springs. In addition, in order to make the natural frequencies of the two vibration paths different, the turbine (34) of th...

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Problems solved by technology

However, if the natural frequencies of the vibration paths B and C are rationalized by adjusting the spring constant of the elastic body, the overall rigidity of the dual-channel shock absorber will vary greatly

In addition, if the weight of the middle flange and the turbine coupled to the middle flange is adjusted to rationalize the two natural frequencies, the weight of the flange, the turbine, and the weight of the torque converter as a whole will increase.

Therefore, in the above-mentioned two-channel damper, it is not easy to appropriately set the natural frequencies of the vibration paths B and C in order to improve the vibration damping performance. The difference in the frequency of the vibration cannot attenuate the vibration well

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