An automatic transmission (3) of a vehicle having a central synchronization device (8) with at least one shift element (33; 9, 10) assigned to a transmission input shaft (32; 6, 7) and being a friction locking brake, an actuating device (14) driven by supplying energy, and at least one transmission region (34; 12, 13) disposed between the brake and a transmission output shaft (30), an operative connection between the transmission input shaft and the transmission output shaft and different transmission ratios are producible over the at least one transmission region. The brake is transferable with the operative connection and the actuating device (14) into an operating state in which a transmission input shaft (6) interacting with the brake (33; 9, 10), is held in a rotationally fixed manner by the brake (33; 9, 10), wherein the brake (33; 9, 10) is held by the actuating (14) without any energy infeed.

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 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.

The enclosed invention is a new one way clutch where linear or rotary motion between two bodies is transmitted in only one direction by one or more links moving in one of the bodies and connected with the other by friction or positive engagement, the link(s) plays the role of a follower to the cam surface on the other body. The link(s) could be rigid or flexible or in combination of both, and its contact is insured by springs which could be separate or part of any of the mechanism bodies. The link(s) causes the two bodies to cease and move together in the driving direction, and to release in the opposite free movement direction. One of the two bodies can be omitted and replaced by a part of the using machine. Links and cam lubes could be used in pairs. If links reset is needed, flexible elements or additional cam-follower mechanism can be used to avoid impact. Higher forces and torques can be transmitted with minimum backlash, surface fatigue and maximum indexing rate and service life.

A transmission system for a work vehicle includes a transmission. The transmission includes one or more input shafts, one or more output shafts, and shafts disposed in-between. The transmission includes gear sets disposed on the shafts, wherein the gear sets include intermediate gear sets. The transmission includes clutches disposed along the shafts, wherein each of the clutches is configured to selectively couple a respective gear set of the gear sets corresponding to a respective power flow path of the transmission. The transmission also includes a forward coupler and a reverse coupler each disposed on one of the shafts. The transmission system also includes a controller configured to receive a signal indicative of a shuttle shift, and in response to receiving the signal, instruct the clutches to stop rotation of the intermediate gear sets and subsequently shuttle shift between forward and reverse directions.

A transmission includes a gear shift set including a shift gear and a switching mechanism, and another gear shift set including a shift gear and a switching mechanism. At a side face of the lower shift gear, dogs are provided to protrude. The switching mechanism includes a first ring configured to rotate integrally with a shaft, a second ring configured to rotate integrally with the first ring, and an elastic member connecting the first ring and the second ring. The first ring includes first projection portions, and a first abutment portion allowing a shift member to abut thereon. The second ring includes second projection portions, and a second abutment portion allowing the shift member to abut thereon.

A power train system for a hybrid electric vehicle includes an engine; a first motor operating as a motor for driving the vehicle; a first power transmission mechanism connected between the engine and the first motor; a second power transmission mechanism connected between the first motor and a driving shaft of traveling wheels and transmitting engine power transmitted to the first motor or the engine power and power from the first motor to the driving shaft of the traveling wheels; and a second motor connected to the second power transmission mechanism by a fourth power transmission mechanism to transmit power to the second power transmission mechanism and outputting power for driving the vehicle.

A power train system for a hybrid electric vehicle includes an engine; a first motor operating as a motor for driving the vehicle; a first power transmission mechanism connected between the engine and the first motor; a second power transmission mechanism connected between the first motor and a driving shaft of traveling wheels and transmitting engine power transmitted to the first motor or the engine power and power from the first motor to the driving shaft of the traveling wheels; and a second motor connected to the second power transmission mechanism by a fourth power transmission mechanism to transmit power to the second power transmission mechanism and outputting power for driving the vehicle.

A shifter gear for reducing a thrust load that occurs in a shifter gear for restraining friction between the shifter gear and a shift fork. A gear part and an engaging part with the shift fork are disposed at an outer periphery of a base part. The spline is disposed at an inner periphery of the base part. The shifter gear is mounted relatively slidable to a gear shift shaft in an axis direction via the spline and is mounted to be incapable of relative rotation around an axis. The shift fork engaging the engaging part is configured to perform a slide operation on the shifter gear. One part of the spline is configured with a splined collar in an axis direction. The splined collar is a different body from the base part and is able to relatively rotate to the part around an axis.

A marine transmission includes a synchronizer on a counter rotating shaft to shift into a high speed gear. The synchronizer includes friction surfaces on both sides of the gear body for the high speed gear. The high speed gear mesh is helical and generates axial force that enhances the torque carrying capacity of synchronizing friction surfaces, thereby enabling the shifting into the high speed gear without torque interrupt.