A torsion damper with at least one torque input disk and at least one torque output disk, wherein the torque input disk can move in circumferential direction relative to the torque output disk against the force of at least one spring storage, wherein the relative movement is damped by a friction device which generates a smaller friction torque in a first swivel angle range than in a second swivel angle range in that the friction device has at least two friction ring pairs which are rotatable opposite one another and which are activated depending on the swivel angle via a driving connection of at least one friction ring with the torque input disk. The driving connection has a spring element which is arranged functionally in series with the friction device and functionally in parallel with the spring storage.

A compensating coupling comprises two outer coupling parts, namely an input-side coupling part and an output-side coupling part, both of which are to be connected to rotatable elements, more particularly shafts, and a center coupling part, which can be moved to a limited extent relative to the outer coupling parts. The center coupling part is composed of: a tube piece in the form of a damping element; and two tube end pieces, which are fastened to the tube piece and which are each designed to be fitted onto one of the outer coupling parts in a centered manner by ball head centering.

A compensating coupling comprises two outer coupling parts, namely an input-side coupling part and an output-side coupling part, both of which are to be connected to rotatable elements, more particularly shafts, and a center coupling part, which can be moved to a limited extent relative to the outer coupling parts. The center coupling part is composed of: a tube piece in the form of a damping element; and two tube end pieces, which are fastened to the tube piece and which are each designed to be fitted onto one of the outer coupling parts in a centered manner by ball head centering.

In a positive torsion angle region in which a torque is transmitted from an engine side, a small hysteresis torque is generated at all times. Therefore, torsional vibrations of a small amplitude occurring during idle operation can be effectively attenuated by the small hysteresis torque, without switching to a large hysteresis torque, for example, during idle operation of the engine. As a result, the driver can be prevented from feeling uncomfortable due to switching to a large hysteresis torque during idle operation, and drivability can therefore be improved.

A damper for a motor vehicle torque transmission device, in particular of the long travel damper type, having a torque input element (22), a torque output element (28), at least one group (26) of differing elastic members (26a, 26b) mounted between the torque input element and torque output element and acting oppositely to the rotation of the torque input element (22) and torque output element (28) with respect to one another, the elastic members (26a, 26b) of the group of elastic members being arranged in series by means of a phasing member (30) so that the elastic members (26a, 26b) of the group (26) of elastic members deform in phase with one another, the group (26) of elastic members (26a, 26b) being received in a receptacle (44) that is asymmetrical with respect to a median radial plane of the receptacle (44).

A damper for a motor vehicle torque transmission device, in particular of the long travel damper type, having a torque input element (22), a torque output element (28), at least one group (26) of differing elastic members (26a, 26b) mounted between the torque input element and torque output element and acting oppositely to the rotation of the torque input element (22) and torque output element (28) with respect to one another, the elastic members (26a, 26b) of the group of elastic members being arranged in series by means of a phasing member (30) so that the elastic members (26a, 26b) of the group (26) of elastic members deform in phase with one another, the group (26) of elastic members (26a, 26b) being received in a receptacle (44) that is asymmetrical with respect to a median radial plane of the receptacle (44).

A device in a floor processing machine, which is drivable along a floor and has a number of floor processing tools rotatably driven by an engine with a coupling between a shaft of the engine and a shaft of a disc carrying the floor processing tools. The coupling is formed of an elastic, hole-shaped coupling ring which is slotted transversely to its circumferential direction and is connectable by its edge portions to the engine shaft and to a shaft of the coupling, respectively, the coupling ring being openable at its slotted portion for application and removal of the coupling ring to and from connection portions of the engine shaft and coupling shaft.

A device in a floor processing machine, which is drivable along a floor and has a number of floor processing tools rotatably driven by an engine with a coupling between a shaft of the engine and a shaft of a disc carrying the floor processing tools. The coupling is formed of an elastic, hole-shaped coupling ring which is slotted transversely to its circumferential direction and is connectable by its edge portions to the engine shaft and to a shaft of the coupling, respectively, the coupling ring being openable at its slotted portion for application and removal of the coupling ring to and from connection portions of the engine shaft and coupling shaft.

A damper device includes: a first rotary body including a first plate rotating around a rotation shaft and a second plate disposed facing the first plate and integrally rotating with the first plate; a second rotary body rotating relative to the first rotary body; a control plate disposed between the first plate and the second rotary body in an axial direction and engaged with the second rotary body to rotate integrally therewith; a first thrust member a part of which is disposed between the first plate and the control plate in the axial direction and engaged with the first plate to rotate integrally therewith; and a second thrust member a part of which is disposed between the second plate and the second rotary body and engaged with the second plate to rotate integrally with the first rotary body.

A damper device includes: a first rotary body including a first plate rotating around a rotation shaft and a second plate disposed facing the first plate and integrally rotating with the first plate; a second rotary body rotating relative to the first rotary body; a control plate disposed between the first plate and the second rotary body in an axial direction and engaged with the second rotary body to rotate integrally therewith; a first thrust member a part of which is disposed between the first plate and the control plate in the axial direction and engaged with the first plate to rotate integrally therewith; and a second thrust member a part of which is disposed between the second plate and the second rotary body and engaged with the second plate to rotate integrally with the first rotary body.