Damper having torque limiter function

摘要

A damper includes an outer cover having a front cover and a rear cover. The covers are joined to form a lubricant oil accommodation chamber for accommodating liquid. A damper device, a limiter mechanism, a first plate including a first collar portion located toward the front of the limiter mechanism, and a second plate including a second collar portion located toward the rear of the limiter mechanism are arranged in the outer cover. The limiter mechanism includes a first limiter plate, which is an input side on the torque transmission path, a second limiter plate, which is an output side on the torque transmission path, and a limiter disc spring, which presses the limiter plates.

主权项

1. A damper incorporated in a power transmission mechanism for a hybrid vehicle, the damper comprising:
a housing including a first cover and a second cover joined with each other, in which the housing is coupled to a drive plate and filled with lubricant oil; and a damper device arranged in the housing, the damper device including: a plurality of damper springs; a central disc, which is a torque input side portion; an intermediate member, which is connected directly with the central disc or is connected indirectly via the damper springs with the central disc, the intermediate member having an engagement groove; a first friction member arranged in a peripheral portion of the central disc; a limiter plate arranged to face toward the first friction member; a first biasing member which pushes the limiter plate so that the central disc is arranged between the limiter plate and the housing; a hub having a shaft hole arranged at a center of the damper device and fitted to an output member; a first plate and a second plate, which are torque output side portions, arranged on opposite sides of the central disc; a second friction member arranged between the torque output side portion and the central disc, the second friction member having an engagement piece, which engages the engagement groove; and a second biasing member which biases the second friction member, wherein the second friction member suppresses relative rotation of the central disc and the torque output side portion that is greater than or equal to a certain level with slip friction generated when the damper springs are deformed; the hub includes a flange having first to third disc portions that are concentric and have different outer diameters, in which the second biasing member is attached to the first disc portion having the smallest diameter, a washer and the second friction member are attached to the second disc portion having an intermediate outer diameter, and the washer and the second friction member are arranged between the first plate and the third disc portion having the largest diameter in a state in which a biasing force of the second biasing member is applied; and an engagement piece arranged in the washer engages with an engagement hole of the first plate.