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 sliding sleeve for a synchronous manual transmission assembly is produced by the following steps: a tubular blank is provided in which an internal toothing arrangement is present, and the blank which is provided with the internal toothing arrangement is further processed to form a plurality of sliding sleeves.

A friction element (1, 3) for a frictional shift element for a transmission of a vehicle, the friction element having an annular base body with a plurality of friction surface elements (5), the plurality of friction surface elements (5) protruding radially inwardly or radially outwardly and are distributed over a periphery of the annular base body. The friction element (1, 3) and the plurality of friction surface elements (5) are each formed as one piece.

A coupling system for a torque transmission device of a motor vehicle includes a sliding sleeve. An actuator including a mobile member movable between a rest position and an activated position is linked to the sliding sleeve by a rotating kinematic link and by an elastic return member fixed in rotation about the axis of revolution. The mobile member is capable, by means of the kinematic link, of driving the sliding sleeve from the retracted position to the coupling position and of loading the elastic return member by passing from the rest position to the activated position. The elastic return member is able, while unloading, by means of the kinematic link, to return the mobile member from the activated position to the rest position and the sliding sleeve from the coupling position to the retracted position.

A collar and a torque transmission apparatus having a collar. The collar may have a set of collar teeth. Each collar tooth may include a first end surface, a second end surface, a first collar side surface, and a second collar side surface. The first and second collar side surfaces may be concave from the first end surface to the second end surface.

A synchronizing device for a transmission has a sliding sleeve comprising an internal toothing with a plurality of sliding sleeve teeth and a clutch body of a gear wheel, comprising n external toothing with a plurality of clutch body teeth formed without meshing bevel at their axial tooth end close to the sliding teeth, into which the internal toothing of the sliding sleeve can engage. A synchronizing unit is provided which can block axial movement of the sliding sleeve, until the speeds of the sliding sleeve and clutch body are adapted. During operation, an axial force of the sliding sleeve against the clutch body is built up and a speed difference between the sliding sleeve and the clutch body is produced, so that the end faces of the sliding sleeve teeth and the clutch body teeth slide along each other, and the sliding sleeve teeth finally are meshed between the clutch body teeth.

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.

Clutch device with a dog clutch having inner toothing of a sliding sleeve which is displaceable as part of the dog clutch between a clutch body and the hub of an idler wheel along the outer teeth of the clutch body and the outer toothing of the hub for coupling and decoupling. The inner toothing of the sliding sleeve can be produced comparatively simply compared to the prior art and results in a reduced installation space.

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.

A transmission includes a primary gear including primary teeth, each having a primary surface; a secondary gear including secondary teeth; an intermediate gear including intermediate teeth, each comprising a primary intermediate part having a primary intermediate surface and a secondary intermediate part having a secondary intermediate surface, where the primary intermediate part is axially offset from the secondary intermediate part. The intermediate gear is axially displaceable to an engaged position. The primary surface contacts the primary intermediate surface in a contact region and the secondary intermediate surface contacts one of the secondary teeth. In the engaged position, one primary tooth and one intermediate tooth form an overlap, radially inside the contact region, for preventing the intermediate gear from being displaced from the engaged position to a disengaged position.