Abstract: A synchronizer assembly includes a pair of engageable members each including an exterior cone surface and first exterior splines. A central synchronizer ring is disposed between the pair of engageable members and having second exterior splines. A pair of synchronizer cone rings are disposed on opposite sides of the central synchronizer ring and each include third exterior splines and an interior cone surface that oppose the exterior cone surface of respective ones of the pair of engageable members. A sliding synchronizer sleeve engages the second exterior splines of the central synchronizer ring and movable for engaging the third exterior splines of the pair of synchronizer cone rings and the first exterior splines of the pair of engageable members. A plurality of interlocking clips engage the pair of synchronizer cone rings.

Abstract: A synchronizer may have a hub, an engagement sleeve, a pair of engagement ring gears, a pair of synchronizing rings and a pre-synchronizing system interposed between the hub and the engagement sleeve. The pre-synchronizing system may have a single elastic ring which is axially interposed between the synchronizing rings, is drivingly connected with the engagement sleeve in the axial sliding movement relative to the hub and is at least partially received in an internal annular groove of the engagement sleeve.

Abstract: A transfer case for a four-wheel drive vehicle having a disconnectable secondary axle assembly. The transfer case is configured to include a pumpless lubrication sump maintained in relation to a mainshaft for lubricating rotary components surrounding the mainshaft.

Abstract: A synchronizer mechanism for synchronizing the rotation of gears between a power input shaft and a power output shaft in a manual transmission includes a hub and a synchronizer sleeve disposed about the hub and moveable relative thereto into and out of engagement with adjacent gears to synchronize the rotation of the adjacent gears with the rotation of the power input shaft. An indexing mechanism is employed for indexing the synchronizer sleeve into and out of engagement with adjacent gears. The indexing mechanism includes a retaining mechanism and a detent portion having a main synchronization detent and at least one second synchronization detent disposed laterally adjacent the main synchronization detent. The main synchronization detent causes an intermediate clutch ring to contact a cylindrical cone portion on a gear and begin the change in angular velocity of the gear and to begin the synchronization sequence of the mechanism at a first time.

Abstract: An electromagnetic clutch device includes meshing member connected to a first rotational member, a biasing member that biases the meshing member in a direction where a second meshing portion is meshed with a first meshing portion, and a pressing mechanism including a locking portion that presses the meshing member against a biasing force of the biasing member so as to axially move the meshing member. The locking portion is axially immovable relative to the second rotational member, and a cylindrical cam member is provided with a plurality of locked portions to be locked at different axial positions. Locking of the locking portion is shifted from one of the plurality of locked portions to another locked portion placed at a different axial position, and friction torque is caused to synchronize rotation of the first rotational member with that of the second rotational member.

Abstract: A clutch assembly for connecting a shaft to a rotary member mounted on said shaft in a rotationally fixed manner comprises: a sliding sleeve which is rotationally fixed to the shaft, is axially slidably mounted on said shaft and is provided with a first gearing. A clutch body is rotationally fixed to the rotary member and provided with a second gearing which can mesh with the first gearing to connect the shaft and the rotary member in a rotationally fixed manner. And, a locking synchronization unit having a synchronizer ring with a friction surface the ring permitting the speeds of the shaft and the rotary member to be synchronized before the meshing of the first and second gearings. The locking synchronization unit further comprises a locking member which is coupled to the sliding sleeve by a detent groove and to the synchronizer ring in the rotational direction (D) by a pair of locking surfaces.

Abstract: A synchronizing device for transmission having a clutch hub disposed to a shaft and a 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 slidably touch a cone portion formed to the clutch gear, wherein a blocking key receiving portion for supporting the blocking key may be formed to the blocker ring.

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: The invention relates to a synchronization piece which, as part of a servo synchronization system comprising a sliding sleeve, a clutch body, a synchronizer ring and an idler gear, can synchronize a transmission having toothed wheel gears. The invention furthermore relates to an entire synchronizing system having a synchronization piece according to the invention. A full-servo synchronization system is also presented.

Abstract: A double-acting synchronizer includes, but is not limited to a shaft, first and second gearwheels rotatably mounted on said shaft, a sleeve which is axially displaceable along said shaft between a position in which it locks the first gearwheel to the shaft and a position in which it locks the second gearwheel to the shaft. A single conical friction surface is formed between a first baulk ring and the first gearwheel, and multiple nested conical friction surfaces are formed between a second baulk ring and the second gearwheel.

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 synchronizing device for transmission having a clutch hub disposed to a shaft and a 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 slidably touch a cone portion formed to the clutch gear, wherein a blocking key receiving portion for supporting the blocking key may be formed to the blocker ring.

Abstract: The invention relates to a power assist element (11) for arranging in a synchronisation hub (2) of a gear-synchronisation device (1), with a basic body (17), which has a height (18), a longitudinal extension (19) and a width extension (20), wherein the longitudinal extension is arranged in the installed state in the circumferential direction of the synchronisation hub (2), and which in the direction of the longitudinal extension (19) has two opposite distal end sections (21), on which respectively a functional face (22) is formed, which in the installed state cooperate with the synchronisation hub (2).

Abstract: A shift device includes a hub, a sleeve splined with the hub, a pair of speed gears located at both sides of the hub, and a pair of synchronizer rings arranged between the hub and the speed gears. Thrust pieces are respectively engageable with projections of the sleeve and movable in notch portions of the hub in an axial direction the shift device. The thrust pieces are formed with first slanted surfaces pressable on chamfers of the synchronizer rings and second slanted surfaces contactable with slanted surfaces of the hub. The thrust pieces engage and move together with the sleeve in the axial direction when the first slanted surfaces press the chamfers of the synchronizer ring and are disengaged from the sleeve before the splines of the sleeve and the speed gear are engaged.

Abstract: A power transmission apparatus includes a first power transmitting member, a second power transmitting member, a synchronizer ring, arranged between the first power transmitting member and the second power transmitting member, a sleeve held at the first power transmitting member, a synchronizer key arranged between the first power transmitting member and the sleeve, and a drag restricting member arranged between the first power transmitting member and the sleeve. A synchronizer ring engaging portion is formed at a side of the drag restricting member facing the second power transmitting member so as to protrude in the radially inward direction, and a drag restricting engagement portion is formed at the outer circumferential surface of the synchronizer ring at a side thereof facing the first power transmitting member, the drag restricting engagement portion being engageable with the synchronizer ring engaging portion.

Abstract: A gear has a hub with cut-off portions and outer splines as one unit. Thrust pieces are inserted in the cut-off portions for transmitting thrust between a shift sleeve and a synchronizer ring. The gear has a flange portion formed with supporting holes corresponding to the cut-off portions provided with a force-amplifying surface at synchronized member sides thereof. First end portions of the thrust pieces are inserted in the supporting holes. Second end portions thereof are formed with a side end surface for receiving friction torque from the synchronizer ring and with a pressure-receiving slope for transmitting the friction torque to the force-amplifying slope. The thrust pieces swing around centers in the supporting holes so that the second end portions swing in a rotational direction to contact the pressure-receiving slopes with the force-amplifying slopes to change the friction torque to the thrust acting on the synchronizer ring.

Abstract: A device for coupling between a gearbox shaft and an idle pinion borne thereby including a hub fixed on the shaft, and a coupling mechanism equalizing by friction speeds of the shaft and the idle pinion and for transforming rotational movement received from the hub into an axial thrust on the idle pinion, so as to transmit themselves by friction the torque between the hub and the idle pinion. The coupling mechanism only includes three rings, an upper ring integral with the hub, a single intermediate ring, and a lower ring integral with the hub.

Abstract: A transmission synchromesh is provided that includes a pressure element coupled to a synchronizing ring, and one shift sleeve, wherein the pressure element for detent permits an axial position displacement of the shift sleeve relative therewith. A pressure element and a transmission synchromesh method for improved synchronization are also provided.

Abstract: A synchronizing device for shiftable transmissions, comprising a synchronizer which is non-rotatably supported on a gear shaft and which comprises at least one recess for at least one thrust member. A sliding sleeve is arranged on the synchronizer and displaceable in the longitudinal direction of the gear shaft. A sliding wheel is provided for each shiftable gear, which is arranged on the gear shaft and non-rotatably connected to a coupling body. A friction element comprises at least one outer ring for each sliding wheel. An indexing element is arranged on the outer ring for defining the stop position thereof relative to the synchronizer, wherein the indexing element comprises at least one separate stop member arranged above the recess of the thrust member between the synchronizer and the outer ring.

Abstract: A synchronizing device in gear shift transmissions has a gear (28), a shift sleeve (30) which is displaceably engaged with the gear (28) by internal teeth (32), and thrust members (10) disposed between the gear (28) and the shift sleeve (30), each of the thrust members having a casing (12) accommodated in an axial groove (40) of the gear (28), and a spring (18) biasing a pressure member (14) against the internal teeth (32) of the shift sleeve (30). The thrust member (10) is shaped as a flat parallelepiped, and the spring (18) extends transversely of the biasing direction and is supported on the casing (12) or the gear (28) with its peripheral portion and supports the pressure member (14) with is central portion.

Abstract: A double acting synchronizer (18) includes cone clutch friction surfaces (24,40a and 26,42a) and jaw clutch teeth (28,38b and 30,38c) for frictionally synchronizing and positively connecting gears (14,16) to a shaft (12), and a plurality of integrated self-energizing/pre-energizing/blocker assemblies (44). The assemblies include pairs of self-energizing surfaces (54a,54b and 56a,56b) that respectively engage pairs of self-energizing surfaces (46a,46b and 48a,48b) to increase the engaging force of the cone clutches. The pairs of self-energizing surfaces are separated by non-self-energizing surfaces (54e,56e and 46c,48c) which engage to prevent unwanted engagement of the self-energizing surfaces when the synchronizer is in neutral. A detent mechanism resiliently positions the non-self-energizing surfaces for engagement when the synchronizer is in neutral.

Abstract: A synchronizing device (1) for shiftable transmissions, comprising a synchronizer (2) which is non-rotatably supported on a gear shaft and which comprises at least one recess (6) for at least one thrust member (7); a sliding sleeve (3) which is arranged on the synchronizer (2) and displaceable in the longitudinal direction of the gear shaft; a sliding wheel (4) for each shiftable gear, which is arranged on the gear shaft and non-rotatably connected to a coupling body (5); a friction means (8) which comprises at least one outer ring (9) and (10), respectively, for each sliding wheel (4); and an indexing means which is arranged on the outer ring (9), (10) for defining the stop position thereof relative to the synchronizer (2), wherein the indexing means comprises at least one separate stop member (11) arranged above the recess (6) of the thrust member (7) between the synchronizer (2) and the outer ring (9) and (10), respectively.

Abstract: A double acting synchronizer (18) includes cone clutch friction surfaces (24,40a and 26,42a) and jaw clutch teeth (28,38b and 30,38c) for frictionally synchronizing and positively connecting gears (14,16) to a shaft (12), and a plurality of integrated self-energizing/pre-energizing/blocker assemblies (44). The assemblies include pairs of self-energizing surfaces (54a,54b and 56a,56b) that respectively engage pairs of self-energizing surfaces (46a,46b and 48a,48b) to increase the engaging force of the cone clutches. The pairs of self-energizing surfaces are separated by non-self-energizing surfaces (54e,56e and 46c,48c) which engage to prevent unwanted engagement of the self-energizing surfaces when the synchronizer is in neutral. A detent mechanism resiliently positions the non-self-energizing surfaces for engagement when the synchronizer is in neutral.

Abstract: A double-acting baulkring-type synchronizer (18) includes fiction surfaces (24,48 and 26,50) and jaw teeth and jaw teeth (28,54,30,56) for synchronizing and positively connecting forward and reverse gears (14,16) to a shaft (12). Initial engaging movement of a shift sleeve (34) from a neutral position activates pre-energizers (52 or 100) effect engagement of the friction surfaces for engaging blocker surfaces (44a,54a,46a,56a) that prevent asynchronous engagement of the jaw teeth. The pre-energizers include clearances and centering forces to prevent momentary engagement of the friction surfaces associated with the reverse gear and the forward gear when the shift sleeve is moved back to the neutral position from a position of engaged the jaw teeth (28,54 or 30,56) associated respectively with the forward and reverse gears.

Abstract: A double acting synchronizer (18) includes cone clutch friction surfaces (24,40a and 26,42a) and jaw clutch teeth (28,38b and 30,38c) for frictionally synchronizing and positively connecting gears (14,16) to a shaft (12), and a plurality of integrated self-energizing/pre-energizing/blocker assemblies (44).

Abstract: Synchronizing device in a motor vehicle gearbox, comprising a synchronizer hub (1), an engaging sleeve (2) non-rotatably but axially displaceably mounted on the hub, an outer and an inner synchronizing ring (8a, 13) on one side of the hub and a single synchronizing ring (8b) on the other side of the hub. The engaging sleeve has first, and second groups of internal teeth (4a, 4b), each group being divided into three sets of teeth and each set in one group adjoining a set in the other group. The outer synchronizing ring has three sets of blocker teeth (9a) facing the engaging sleeve teeth (4a) of the sets of the first group and lacks teeth in intermediate areas (19a), while said single synchronizing ring (8b) has three sets of blocker teeth (9b) facing the engaging sleeve teeth (4b) of the sets of the second group and lack teeth in intermediate areas (19b).

Abstract: A synchronizer (18) includes cone clutch friction surfaces (24,48 and 26,50) for frictionally synchronizing gears (14,16) to a shaft (12), and jaw clutch teeth (28,30) engagable with jaw teeth (36a,36b) defined on a shift sleeve (34) for positive connecting the gears to the shaft. A plurality of self-energizing/blocker members (62) transmit shift force applied to the shift sleeve and self-energizing force to friction rings (40,42) via blocker surfaces (44r,44s,44p,44q) defined by blocker members (44) that have opposite ends (44c,44d) attached to the friction rings. The blocker members also disengage the friction surfaces of one cone clutch prior to engagement of to the friction surfaces of the other cone.

Abstract: A baulkring-type synchronizer (18) includes cone clutch friction surfaces (24,48 and 26,50) for frictionally synchronizing gears (14,16) to a shaft (12), and jaw clutch teeth (28,30) engagable with jaw teeth defined on opposite ends of splines (36) for positive connecting the gears to the shaft. Pluralities of rigid self-energizing members (62) are drivingly interposed between blocker teeth (44,46) affixed to baulkrings (40,42) and self-energizing ramp surfaces (60a-60d) defined on an outer circumference of a hub 32 affixed to the shaft (12). A shift sleeve (34) is slidably splined to the hub (32) and is moved by a shift force and an additive force provided by the self-energizing ramp surfaces. Both forces react against the blocker teeth to engage the friction surfaces.

Abstract: A dual synchronization system of a manual transmission constructed in the dual set of a plurality of keys to be attached to the internal side of a synchronizer sleeve by a synchronizer ring, first and second key sets being positioned apart at a predetermined degree of angle along the circumferential direction of a synchronizer ring, wherein the first key set attaching the synchronizer ring close to a clutch gear at the initiation of synchronization and the second key set pushing the synchronizer ring close to the clutch gear after the completion of synchronization, thereby continuously maintaining the frictional force between the synchronizer ring and the clutch gear to achieve stable shifting feelings.

Abstract: A double-acting baulkring-type synchronizer (18) includes fiction surfaces (24,48 and 26,50) and jaw teeth and jaw teeth (28,54,30,56) for synchronizing and positively connecting forward and reverse gears (14,16) to a shaft (12). Initial engaging movement of a shift sleeve (34) from a neutral position activates pre-energizers (52 or 100) effect engagement of the friction surfaces for engaging blocker surfaces (44a,54a,46a,56a) that prevent asynchronous engagement of the jaw teeth. The pre-energizers include clearances and centering forces to prevent momentary engagement of the friction surfaces associated with the reverse gear and the forward gear when the shift sleeve is moved back to the neutral position from a position of engaged the jaw teeth (28,54 or 30,56) associated respectively with the forward and reverse gears.

Abstract: A synchronizer for manual transmission constructed and arranged to separate a sleeve moved by a shift fork to an inner sleeve and an outer sleeve to soften a gear shifting feel and to improve a durability of transmission. The synchronizer has a hub gear coupled to a main spindle, a speed gear installed on the main spindle relative to a side surface of the hub gear and formed with a clutch gear on an inner surface thereof relative to the hub gear side and a sleeve coupled to an outer circumference of the hub gear to move toward an axial direction during gear shifting and to be synchronized to the clutch gear.

Abstract: A synchronizer element for use in a synchronizing device of a manual transmission, includes a hub secured in fixed rotative engagement on a gearshaft, and a guide member fixedly secured to the hub and having a splined outer circumference formed with at least one pocket for receiving a loading member and in mesh with a shift sleeve moveable between axially spaced pinion gears rotatably supported on the shaft. The synchronizer element is made of two separate parts which are so joined together as to form pockets for thrust members which are held captive and guided in the pockets.