Abstract: A first dog ring and a second dog ring are biased toward each other by means of springs. When the first dog ring and the second dog ring are moved away from each other, bias force produced by the springs is applied to the second dog ring in a direction to draw the second dog ring toward the first dog ring. Accordingly, when the first dog ring is moved away from the second dog ring during shifting, the second dog ring is drawn toward the first dog ring under the bias force, and third engaging teeth of the second dog ring and meshing teeth of a first-speed gear are promptly disengaged from each other.

Abstract: A first dog ring and a second dog ring are biased toward each other by means of springs. When the first dog ring and the second dog ring are moved away from each other, bias force produced by the springs is applied to the second dog ring in a direction to draw the second dog ring toward the first dog ring. Accordingly, when the first dog ring is moved away from the second dog ring during shifting, the second dog ring is drawn toward the first dog ring under the bias force, and third engaging teeth of the second dog ring and meshing teeth of a first-speed gear are promptly disengaged from each other.

Abstract: A clutch and gear synchronizer module includes an actuator disposed radially with respect to the transmission shaft and carried by an actuator carrier connected to the transmission shaft for rotation with the transmission shaft. The actuator includes an offset pin coupled to a shift sleeve that is able to move axially with respect to the transmission shaft thereby causing axial and rotational movement of the offset pin and rotation of the actuator about an actuator axis. The actuator includes a lobe and a pawl. Sequentially, the lobe engages a friction ring thereby causing the friction ring to engage the gear and causing the gear to rotate in synchronization with the transmission shaft. As the shift sleeve moves further towards the gear, the pawl then engages clutch teeth disposed on an annular surface of the gear.

Abstract: A synchronizing device of a manual transmission may include a clutch hub splined on a rotation shaft, a sleeve engaged to an external circumferential portion of the clutch hub by interposing a blocking key therebetween, the sleeve being movable axially, a clutch gear having a cone portion and disposed at both sides of the sleeve without an interference with the rotation shaft, a blocker ring frictionally engagable to the cone portion of the clutch gear, and a normal gear and a groove gear formed at an interior circumference of the sleeve, wherein a width of a middle portion of the groove gear may be wider than that of the normal gear, and the middle portion of the groove gear has a key supporting portion and a locking groove formed on the key supporting portion and engaged to an exterior circumference of the blocking key.

Abstract: A synchronizing device for transmission including a clutch hub disposed to a shaft and a plurality of clutch hub groove formed thereto, a sleeve splined and connected to an external side of the clutch hub for being capable of moving along axial direction of the shaft, a blocking key disposed to the clutch hub groove, and a clutch gear disposed coaxial to the shaft may include a blocker ring disposed to touch a cone portion formed to the clutch gear, wherein a blocking key locking portion may be formed to the clutch hub for an upper external circumference of the blocking key to contact thereto, and a receiving portion for supporting the blocking key may be formed to the blocker ring.

Abstract: A device for rotationally fixing a shaft to a component that is rotatably arranged on the shaft. The actuating element positively engages the components to rotationally fix the components to the shaft. The difference in rotational speeds, between the component and the shaft, can be at least approximately compensated for by the actuating element. The actuating element, for rotationally fixing the component to the shaft by the actuator, is operatively connected to at least one support body, which is rotationally fixed with respect to the shaft in such a manner that the actuating element can act upon the component with an actuating force that depends on the torque to be transmitted from the shaft to the component and which is independent of the actuation of the actuator in the state in which the actuating element can be rotated relative to the shaft.

Abstract: A releasable drive connection includes a ring including teeth angularly spaced about an axis, and grooves, each groove formed in an axial end of the ring and aligned angularly with a space between consecutive ring teeth; and a sleeve supported for axial movement, including first teeth angularly spaced about the axis, engageable with the ring teeth, each first tooth having a first length; and second teeth, each second tooth aligned with one of the first teeth, having an axial length shorter than the first length, and including a pointed end for engaging one of the grooves and permitting the first tooth to extend between and engage consecutive gear teeth.

Abstract: A strut-type synchronizer for coupling a gear to a rotating shaft includes a hub rotating with the shaft, a clutch ring rotatable with the gear, and a friction ring disposed between the hub and the clutch ring. The hub supports several struts for relative axial movement, as urged by an encircling splined sleeve through a detent, into engagement with the friction ring. The friction ring, which does not itself directly engage the sleeve, has a friction surface that is thus urged by the struts into engagement with a complementary friction surface of the clutch ring, whereupon relative rotation between the friction ring and the clutch ring ceases, the detent is overcome, and the sleeve's spline teeth engage complementary spline teeth on the clutch ring to fully engage the synchronizer. The friction surfaces include two axially-spaced frustoconical portions, by which an increased cone torque is achieved during synchronization.

Abstract: In a synchronizing device with a synchronizing body, a sliding sleeve for coupling the sliding body to a gear wheel, two synchronizing rings for rotational speed matching between the synchronizing body and the gear wheels, and a pivotable balancing lever having opposite arm extending into support openings in the synchronizing rings, the balancing levers are pivotable about a central axis so as to permit limited rotation of the synchronizing rings relative to the synchronizing body.

Abstract: A gearshift mechanism for a synchronized gear change transmission of a motor vehicle, having a gearshift sleeve which is displaceably supported on a synchronizer body and which can be brought into operative engagement with a gear wheel via at least one synchronizer ring. To support the synchronization process, first and second recesses are formed in the inner peripheral face of the gearshift sleeve, and locking blocks with a spring-loaded ball are provided on the synchronizer body, which engage in the recesses in certain shift positions. For preliminary and subsequent synchronization, the first and second recesses formed in the inner peripheral face of the gearshift sleeve be radially and axially offset and each cooperate with a spring-loaded ball.

Abstract: A transmission shift system comprising a synchronizing device for idler wheels, which comprises one sliding sleeve that can mesh with a selected idler wheel. The sliding sleeve is arranged non-rotatably and axially displaceable on a shaft with hydraulic actuation being provided. Each sliding sleeve (6) is connected with the shaft (1) via a hub element (7). The synchronizing operation can be implemented as a function of the hydraulic actuation pressure.

Abstract: A transmission shift system comprising a synchronizing device for idler wheels, which comprises one sliding sleeve that can mesh with a selected idler wheel. The sliding sleeve is arranged non-rotatably and axially displaceable on a shaft with hydraulic actuation being provided. Each sliding sleeve (6) is connected with the shaft (1) via a hub element (7). The synchronizing operation can be implemented as a function of the hydraulic actuation pressure.

Abstract: In a gear-jumping-proof positive-locking clutch for connecting a vehicle transmission shaft to a transmission component mounted coaxially and rotationally with it, the positive-locking clutch includes an axially displaceable sliding sleeve on which at least one locking roller element may be supported which is displaceable in a radial locking recess with axial displacement of the sliding sleeve due to a radial force component. In a gear-jumping-proof positive-locking clutch which does not cause any transmission noise when disengaged, the positive-locking clutch is free of synchromesh bodies and the locking roller element is axially displaceable.

Abstract: In a sliding sleeve (1) of a synchronizing unit having inward directed teeth (2, 11) configured on the inner periphery of the sliding sleeve, the teeth (11) comprise recesses (11a) formed by plastic displacement of material out of the teeth (11).

Abstract: A manual automobile transmission includes a non-rotating reverse gear having an internal spline in the front portion of the reverse gear and a needle roller bearing mounted at the rear portion. The bearing supports the gear and allows the main shaft to rotate without the gear turning when the transmission is not in the reverse mode. A separate splined collar is mounted on the shaft. Internal splines on the collar readily engage the splines on the main shaft and extended splines match the reverse gear splines. A small spring ball is inserted in the gear just forward of the splines to facilitate alignment of the gear and splined collar.