A method for manufacturing a clutch body for a synchronizing device of a transmission includes the steps of: a) providing an externally toothed clutch disk, b) providing a counterfriction ring, c) applying a friction lining onto the counterfriction ring, d) establishing a non-releasable connection between the clutch disk and the counterfriction ring, and e) upsetting a portion of the counterfriction ring at least partly provided with the friction lining in radially inwardly facing direction, so that a counterfriction cone is formed, which is provided for cooperation with a friction surface of the synchronizer 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.

Provided is a transmission which eliminates torque loss during gear shift and with which the processing of components can be simplified. An axial force is generated in a protrusion by means of a first portion during gear shift from a low gear to a high gear, and when a low-speed transmission gear and a clutch ring separate from each other, a high speed transmission gear and the clutch ring interlock. Since relative movement of the protrusion in a neutral direction is suppressed by means of a first retaining portion during coasting, gear disengagement whereby the transmission gears and the clutch ring separate from each other can be suppressed. Since the first retaining portion can be formed in a first wall when providing a groove portion, an increase in the component processing workload can be suppressed.

A vehicle including a coupling device that includes (a) an engagement clutch mechanism for coupling an input side engagement member that is coupled to a drive power source of the vehicle and an output side engagement member that is coupled to a drive wheel of the vehicle; and (b) a cam mechanism for assisting engagement of the input and output side engagement members depending on a differential torque by which the input and output side engagement members are rotated differentially. The vehicle includes a control device configured, when the engagement of the input and output side engagement members is to be released, to cause a braking force to be applied to one of the input and output side engagement members such that the differential torque is reduced.

Provided is a synchronizer device and method for a manual transmission, having a sliding sleeve which includes an internal toothing having sliding sleeve teeth, a clutch body, the clutch body having an external toothing having a multitude of clutch body teeth for internal toothing of the sliding sleeve to engage therein, and a synchronizer unit. The clutch body teeth at the axial tooth ends adjacent the sliding sleeve and/or at least some of the sliding sleeve teeth at the axial tooth ends adjacent the clutch body each include at least one convex end face which extends in the circumferential direction from a root point adjacent to a tooth flank of the respective tooth via an axially protruding apex portion as far as to a root point adjoining an opposite tooth.

In a claw-type gearshift, a blocking ring is arranged axially between a hub body having a sliding sleeve and a clutch body such that it is rotatable between a release position and two locking positions. The blocking ring is adapted to be displaced toward the clutch body until conical friction surfaces on the blocking ring and on the clutch body come into contact. The blocking ring constitutes a form-locking blockade for the sliding sleeve against displacement of the sliding sleeve teeth between the clutch body teeth when an axial shifting force is applied in the non-synchronized state. When the claw clutch is shifted, a difference in speed between the clutch body and the hub body is reduced and the sliding sleeve is deflected in the axial direction toward the speed change gear to be shifted, as a result of which a friction surface of the blocking ring and a mating friction surface of the clutch body come into contact.

Disclosed is a clearance control swash plate device for a transmission or reducer and a single-shaft two-speed drive system, including the clearance control swash plate device, with a friction clutch. The clearance control swash plate device includes: an action plate mounted on a power transfer shaft; a first thrust bearing disposed on the action plate, and configured to prevent rotation force, received from the action plate, from being transferred; a first clearance swash plate disposed on the first thrust bearing; a second clearance swash plate disposed on the first clearance swash plate; a worm engaged with a worm gear formed on the outer circumference of the second clearance swash plate; a second thrust bearing disposed on the second clearance swash plate, and configured to prevent rotation force, received from the second clearance swash plate, from being transferred; and a thrust washer disposed on the second thrust bearing.

Disclosed herein are a clearance control swash plate device for a transmission or reducer and a single-shaft two-speed drive system, including the clearance control swash plate device, with a friction clutch applied thereto. The clearance control swash plate device includes: an action plate mounted on a power transfer shaft; a first thrust bearing disposed on the action plate, and configured to prevent rotation force, received from the action plate, from being transferred; a first clearance swash plate disposed on the first thrust bearing; a second clearance swash plate disposed on the first clearance swash plate; a worm engaged with a worm gear formed on the outer circumference of the second clearance swash plate; a second thrust bearing disposed on the second clearance swash plate, and configured to prevent rotation force, received from the second clearance swash plate, from being transferred; and a thrust washer disposed on the second thrust bearing.

The invention relates to an assembly (1) at least comprising a first metal component (2) having a first surface region (5) and a second metal component (3) having a second surface region (7), wherein the two surface regions (5, 7) face each other, and the first and the second component (2, 3) are connected cohesively together at least in a subregion of the two surface regions (5, 7), and wherein at least one of the two metal components (2, 3) is a sintered component, wherein that surface region (7) of the sintered component that has the cohesive connection has a higher density than the adjoining further surface region of the sintered component.

The present disclosure relates to an electromagnetic clutch, including a selector sleeve which is arranged in a rotationally fixed manner on a first shaft and is adapted to be shifted linearly along the first shaft between an engaged and a disengaged state, a coupling body which is aligned coaxially to the first shaft, a stator which has a coil which serves to shift an armature ring linearly along the first shaft, the armature ring being mounted radially in an axial guide separately from the first shaft and the coupling body, wherein a shifting of the armature ring by the coil is also accompanied by a shifting of the selector sleeve. The present disclosure also relates to a method of closing and opening an electromagnetic clutch.