A transmission for an at least partially electrically driven vehicle includes a rotor shaft of an electric machine, an input shaft, and a synchronization device arranged to couple the input shaft to the rotor shaft. The synchronization device includes a first synchronization ring connected to the rotor shaft for conjoint rotation, a second synchronization ring, a friction disk located axially between the first synchronization ring and the second synchronization ring, a clutch body connected to the input shaft for conjoint rotation, and a sliding sleeve, axially slidable along the clutch body to initiate synchronization of the first synchronization ring and the second synchronization ring for conjoint rotation to couple the rotor shaft to the input shaft. The first synchronization ring may have a cone for receiving the second synchronization ring.

Assembly for a synchronization unit of a variable ratio gear transmission. Assembly has a synchronizer ring and a friction ring. The friction ring has a friction surface and an installation surface and the synchronizer ring has a contact surface directed toward the installation surface. To allow a high efficiency of the synchronizing unit and simultaneously a functionally safe and comfortable operation of the variable ratio gear transmission, the synchronizer ring and the friction ring are configured and arranged such that the geometrical shape of the installation surface of the friction ring differs from the geometrical shape of the contact surface of the synchronizer ring in a relief state of a synchronizing process; and that the geometrical shape of the installation surface of the friction ring corresponds to the geometrical shape of the contact surface of the synchronizer ring in a load state of the synchronizing process.

A synchronizer is provided for torsionally connecting a gear to an axially aligned shaft. The synchronizer includes a hub connected with the shaft, a sleeve having an inner diameter with spline teeth for torsional connection with the hub being axially movable upon the hub, a blocking ring torsionally connected on the hub having an angular lost motion relationship with the sleeve, the blocking ring having at least a first annular conical friction surface orientated radially inward and axially toward the hub and a second annular conical friction surface oriented radially inward and axially outward from the hub, the blocking ring having blocking cogs preventing axial movement of the sleeve toward the gear when the gear is in a non-synchronous condition, and an engagement ring for fixed connection with the gear, the engagement ring having a complementary annular conical friction surfaces.

The invention relates to a shifting device for a motor vehicle transmission, comprising a first coupling component, a second coupling component rotatable about a transmission axis (A), an inner friction ring which has a conical surface on a radially outer face, an outer friction ring which has a conical surface on a radially inner face, and an intermediate friction ring which comprises a friction cone and is connected to the second coupling component for joint rotation with and for axial displacement with respect to the second coupling component, whilst the inner friction ring and the outer friction ring are connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component. The friction cone extends between the conical surfaces of the inner friction ring and outer friction ring, the coupling components being decoupled in the rotation direction in an axial starting position of the outer friction ring and being coupled in a frictional fit in the rotation direction in an axial frictional fit position of the outer friction ring. The intermediate friction ring has a C-shaped ring cross section extending peripherally in the circumferential direction, comprising a radially outer linear cone limb which forms the friction cone and comprises two substantially parallel conical friction surfaces, and comprising a radially inner linear axial limb which is integrally connected to the cone limb by a radial web.

A synchronizing ring for a synchronizer of a transmission. The inside of the synchronizing ring being provided with a plurality of cams and corresponding recesses between the cams for receiving a plurality of axial protrusions of a further synchronizing ring. An inner radial surface of each cam is provided with a plurality of grooves for transportation of oil.

A synchronizing ring for a synchronizer of a transmission. The synchronizing ring is provided with a plurality of axially extending cams for engagement with a further synchronizing ring. An axial surface of each axial cam is provided with at least one groove for transportation of oil.

A transmission device includes a first rotating member and a ring for synchronizing the first rotating member and a second rotating member relative to each other. The first rotating member is provided with a plurality of first recesses for receiving a plurality of protrusions provided on the synchronizing ring. The first rotating member has one said first recess for each of said protrusions. The first rotating member is provided with one or more second recesses making the total number of first and second recesses exceeding the number of said protrusions.

A cone clutch for a vehicle may include a hub, a sleeve, a clutch ring including a clutch cone, a first friction ring, an internal middle cone, a second friction ring, an external middle cone, and a third friction ring, wherein friction members are provided on only any one of two contact surfaces between the clutch cone and the first friction ring, between the first friction ring and the internal middle cone, between the internal middle cone and the second friction ring, between the second friction ring and the external middle cone, and between the external middle cone and the third friction ring.

A synchronizing ring for a synchronizer of a transmission. The inside of the synchronizing ring being provided with a plurality of cams and corresponding recesses between the cams for receiving a plurality of axial protrusions of a further synchronizing ring. An inner radial surface of each cam is provided with a plurality of grooves for transportation of oil.

A method for synchronizing a first drive element rotatable about an axis of rotation with a second drive element rotating about the axis of rotation at a target speed, of a powertrain of a motor vehicle, in which a synchronizing force is exerted on a synchronizing unit by an actuator. A speed, at which the first drive element rotates about the axis of rotation is adapted by the synchronizing unit to the target speed. The synchronizing force is increased during a first time span, so that the speed approaches the target speed. The synchronizing force is continuously reduced during a second time span following the first time span, before the speed corresponds to the target speed.