A damper device includes: a first rotating body rotating around a rotation shaft and receiving power transmitted from a flywheel; a second rotating body including a first plate receiving the power transmitted from the first rotating body and a second plate disposed to face the first plate and rotating integrally with the first plate; a third rotating body rotating relative to the second rotating body around the rotation shaft; a fastening body integrating the first and second plates at a position radially spaced apart from a position where the power is transmitted from the first rotating body to the first plate; and an elastic mechanism elastically interconnecting the second and third rotating bodies in a rotation direction. The first plate is provided with a restricting portion restricting relative rotation of the third rotating body beyond a predetermined torsion angle.

In a damper device, a dynamic damper is coupled to a first intermediate member, first and second inner-side springs that act in series with each other are straight coil springs disposed between a second intermediate member and a driven member so that outward movement of the springs in a radial direction of the damper device is restricted at respective both ends, and a gap is formed between each body portion of the first and the second inner-side springs and the second intermediate member or a spring abutment portion of the driven member.

A rotary device includes two rotatable rotors and two stopper mechanisms. The first and second stopper mechanisms restrict relative rotation between the rotors. The first stopper mechanism includes a first protruding member and a first contact surface. The first protruding member includes an elastic outer peripheral part. The first contact surface is disposed at an interval from the first protruding member. The first protruding member contacts the first contact surface when a torsion angle between the rotors reaches a first angle. The second stopper mechanism includes a second protruding member and a second contact surface. The second protruding member includes an outer peripheral part having higher stifffiess than that of the first protruding member. The second contact surface is disposed at an interval from the second protruding member. The second protruding member contacts the second contact surface when the torsion angle reaches a second angle greater than the first angle.

A torque converter includes first and second dampers disposed in a torque transmission path during lockup, and a dynamic damper attached to the torque transmission path between the first and second dampers. The dynamic damper includes an inertial rotating body having a weight member mounted on an outer peripheral part of an inertia plate sandwiched between a pair of retaining plates and an elastic member provided between the inertia plate and the retaining plates. A claw part is provided on one of the retaining plates disposed on a side opposite to the clutch constituent member with respect to the inertia plate. The first damper spring is sandwiched between the claw part and the clutch constituent member, and an elongated hole is formed in the inertia plate, the elongated hole extending lengthwise in a peripheral direction of the inertia plate while the claw part is inserted through the elongated hole.

A torque transmission device for a motor vehicle includes a torque input element for coupling to a driving shaft, a torque output element for coupling to an input shaft of a gearbox, the torque output element and the torque input element pivotable with respect to one another, and first and second elastic damping stages installed in series between the torque input element and torque output element. The first damping stage has an elastic member installed between the torque input element and a guidance device so as to act against the rotation of the guidance device with respect to the torque input element. The second damping stage has at least one elastic member installed between the guidance device and the torque output element so as to act against the rotation of the torque output element with respect to the guidance device. The guidance device has first and second stop means.

An electromechanical transmission apparatus for actuation systems for guidance systems of an aircraft, includes a planetary gear system configured to provide a kinematic transmission between a driving element and an output shaft. The planetary gear system includes a central sun gear planet gears coupled rotatably to a planet carrier, and an external ring gear; furthermore having an electromechanical brake and a viscoelastic damper, the electromechanical brake being configured to lock and release selectively the viscoelastic damper and the central sun gear so that the electromechanical transmission apparatus can be configured: in an active configuration, and An electronic control unit is configured to control the electromechanical brake so as to make the transmission apparatus pass from the active configuration to the passive configuration when a locking condition of the driving element occurs.

The present invention relates to a shock absorber with mechanical stop for torque converter that has a simplified manufacturing process and also prevents the exterior springs from reaching the solid length. To achieve the foregoing, a shock absorber with mechanical buffer stop is implemented which comprises a drive plate; at least one exterior spring; and a driven plate, wherein the driven plate additionally comprises at least one mechanical stop which is configured to make contact with the drive plate when the drive plate compresses each exterior spring, and each mechanical stop is located such that it prevents each exterior spring from reaching a solid-length condition.

A device that will allow a go kart to smoothly accelerate and decelerate particularly during racing the go cart. This device once assembled will allow the gradual absorption of shock on the drive chain as it rotates around thereby, rotating the axle of the go kart.

A vibration-proof bush capable of suppressing incomplete fitting of an upper bush and a lower bush. The vibration-proof bush includes an upper bush configured to be mounted on a vehicle body side and a lower bush configured to be fitted to the upper bush are provided, wherein the vibration-proof bush includes interference portions configured to interfere with each other in a process of fitting the lower bush to the upper bush, and the interference portions form a fitting-sound generation structure in which a sound is generated, when the lower bush is fitted to the upper bush during temporary assembling.

A torsional vibration damper, including: an axis of rotation; a drive plate; an output flange; and a spring retainer plate including a first side facing in a first axial direction, a second side facing in a second axial direction, and a plurality of spring stops formed of a same material forming the spring retainer plate. Each spring stop: extends from the first side at least partially in the first axial direction; and includes first and second circumferentially separated end surfaces separated, in the first axial direction, from the first side by first and second gaps, and a plurality of springs. Each spring includes a first circumferential end engaged with a respective first end surface and a second circumferential end engaged with a respective second end surface. The spring retainer plate partially surrounds the plurality of springs and retains the plurality of springs in a radially outward direction.