Abstract: This shift device is provided with a detent device, which is provided with an engaging member that is provided between a housing and a shift fork and that engages in a recessed part of the shift fork, and an elastic member that pushes the engaging member toward the recessed part of the shift fork, the engaging member being pushed into the recessed part of the shift fork by the urging force of the elastic member and the shift fork being held in a neutral position when a hub and a transmission gear are in an unengaged neutral position, and the engaging member being pushed into an inclined surface of the shift fork by the urging force of the elastic member and the shift fork being urged into an engaged position when the hub is in an engaged position of being engaged with the transmission gear.

Abstract: A shift guide structure of a transmission includes a guide pin located on one of a shift-and-select shaft and a case, the shift-and-select shaft being supported by the case and axially and circumferentially movable; and a guide plate located on the other of the shift-and-select shaft and the case, the guide plate being provided with a path for guiding the guide pin between positions corresponding to gears. The guide pin includes a cylindrical part. The guide pin includes an insertion to be inserted into the path. A cross section of the insertion includes an outer circumferential edge that includes two mutually parallel linear parts with spacing smaller than an outer diameter of the cylindrical part, and two projections that connect ends of the two linear parts. The projections each include a curved part having a radius of curvature smaller than a radius of the cylindrical part.

Abstract: A wet multi-plate clutch includes: a piston movable between a transmission position where the piston pushes a clutch plate group including a plurality of inside clutch plates supported on an inside cylinder and a plurality of outside clutch plates supported on an outside cylinder, in an axial direction to cause friction between the inside and outside clutch plates, and a disconnection position where the piston is spaced apart from the clutch plate group; and a movable wall configured to move integrally with the piston. The disconnection position includes a first disconnection position and a second disconnection position where the distance between the clutch plate group and the piston is longer than at the first disconnection position. When the piston is positioned at the first disconnection position, a first through hole provided in the inside cylinder and a second through hole provided in the movable wall overlap in the radial direction.

Abstract: A control apparatus for a vehicle transmission that includes: transmission gears disposed on a shaft; a switching mechanism which is to be switched between a connecting state in which one of the transmission gears is rotatable integrally with the shaft and a disconnecting state in which the one of the transmission gears is rotatable relative to the shaft; a shift fork for axially moving the switching mechanism; and a shift barrel to be rotated to position the shift fork. The switching mechanism includes first and second rings and an elastic member which is disposed between the first and second rings in the axial direction and connects the first and second rings. The control apparatus determines that a failure occurs in the vehicle transmission, when a value related to a reaction force that acts on the shift barrel during rotation of the shift barrel is deviated from a predetermined range.

Abstract: According to one embodiment, for example, a transfer control device controls a transfer that adjusts torque distribution to front wheels and rear wheels of a four-wheel vehicle and that includes a wet type multi-disc clutch and a piston. The transfer control device includes: a detector that detects, based on an output value of a sensor provided in the vehicle, whether a predetermined condition corresponding to a state immediately before ignition of the vehicle is turned ON is established; a controller that starts moving the piston when the detector detects that the predetermined condition is established, so that the multi-disc clutch is switched to a connected state from a disconnected state; and a storage that stores therein, while the piston is moved by the controller, information on a connection start state at which connection of the multi-disc clutch is started.

Abstract: According to one embodiment, a transmission includes a first shaft, a first gear pair, a second gear pair, a synchronization mechanism, and a clutch mechanism. A first sleeve of the synchronization mechanism is movable along the axis of the first shaft between a pressing position, in which the first sleeve presses a second cone surface of a synchronizer ring against a first cone surface of a third gear of the second gear pair, and a non-pressing position in which the first sleeve does not press the second cone surface against the first cone surface. The clutch mechanism transmits rotation between the first shaft and a first gear of the first gear pair and transmits no rotation between the first shaft and the third gear. The clutch mechanism transmits rotation between the first shaft and the first gear while the first sleeve moves from the non-pressing position to the pressing position.

Abstract: A power transmission system includes a control device that controls a motor generator, a synchronizing mechanism, and a clutch mechanism such that at least one of the synchronizing mechanism and the clutch mechanism constantly transmits power between a first shaft and a second shaft during a gear switch from a first-speed gear to a second-speed gear and the motor generator constantly generates torque for a period from operation start of each of the synchronizing mechanism and the clutch mechanism to a power transmission state of the synchronizing mechanism.

Abstract: The lubricating device for a transmission includes a first gear wheel at one of the front side and the rear side of a power transmission shaft, a second gear wheel at the other side of the power transmission shaft at a position different from the first gear wheel and an oil separator disposed below the first gear wheel and the second gear wheel extending in front-rear direction of the power transmission shaft and having an inner wall. The oil separator is provided with a descending sloped fluid passage which is provided on the inner wall of the oil separator so as to be sloped downward toward the one side of the power transmission shaft from the other side of the power transmission shaft receives lubricating oil scooped up by the second gear wheel and allows the lubricating oil to flow into a first gear wheel cover portion.

Abstract: A dog clutch includes a gear (40) mounted on a power transmission shaft (30), first and second dog rings (10, 20), a fork (60), springs (65), and cam grooves (31). The cam grooves (31) each include a first slope surface (36) inclined from the axial direction toward the positive rotation direction as the first slope surface (36) approaches the gear (40) and a second parallel surface (37) parallel to the axial direction. The first dog ring (10) includes first cam protrusions (16) to be engaged with the respective first slope surfaces (36), and the second dog ring (20) includes second cam protrusions (26) to be engaged with the respective second parallel surfaces (37). This structure prevents the dog rings and the fork from coming into contact with each other, thereby avoiding generation of abrasion and increasing the transmission efficiency.

Abstract: The manual transmission includes a shift select shaft, a connecting member, a lever member, a guide pin and a guide plate, wherein the connecting member, the lever member, the guide pin and the guide plate are arranged so that under a state that the guide pin and the guide plate are engaged at the engaging portion, assuming that the portion of the shift select shaft is a fulcrum, the connecting portion is a point of effort, the engaging portion is a point of load and that the fulcrum, the point of effort and the point of load exist on a same virtual plane, an operation direction of a reaction force generated at the point of load becomes a direction opposite to the operation direction of the operation force inputted to the point of effort.

Abstract: The oil receiver includes a capture portion which captures oil and leads the oil to a gutter portion. The capture portion includes a first lower eave portion which is formed in a plate shape extending upward as it goes in a first width direction, a first upper eave portion formed in a plate shape extending upward as it goes in the first width direction and is formed so that one end of a second width direction side is separated from the first lower eave portion inside a vertical range above an upper surface of the first lower eave portion, the second width direction being a direction opposite to the first width direction, and a first connection portion which connects a part of an end of the second width direction side of the first upper eave portion to a part of the upper surface of the first lower eave portion.

Abstract: The transmission includes a plurality of shift forks which includes a U-shaped main body, an engaging portion and a pair of supporting portions provided at both sides of the main body. When the engaging portion engages with the inner lever and the shift select shaft moves along in the axis line, the plurality of shift forks is rotated relative to the housing about the pair of supporting portions as a rotation center thereof and the sleeve connected to the pair of connecting portions is configured to be movable between the low speed side gear and the high speed side gear and the pair of supporting portions is provided at a point between a pair of reference fulcrums and the pair of connecting portions where a rotational moment of a connecting body formed by connecting the sleeve with the plurality of shift forks becomes zero at the pair of reference fulcrums.

Abstract: According to one embodiment, an oil guide member is provided in a case of, for example, a transmission. The case is provided with a first oil channel through which lubricant flows when a shaft is rotated in a first rotation direction, and a second oil channel through which the lubricant flows when the shaft is rotated in a second rotation direction. The oil guide member includes a base portion forming an oil chamber capable of storing the lubricant between the base portion and an internal surface of the case, and an extending portion extending from the base portion toward inside of an internal oil channel of the shaft, and provided with a communicating channel communicating with the oil chamber and the internal oil channel. The base portion is provided with an inlet allowing an inflow of the lubricant from the first oil channel and the lubricant from the second oil channel.

Abstract: A vehicle manual transmission includes: shift fork shafts; shift forks; sleeves; and gear pieces. Each of the shift forks is coupled with the shift fork shaft so as to be moved together. Each of the sleeves has an annular shape. The sleeve includes an annular sliding groove to be fitted to the shift fork on an outer peripheral surface of the sleeve. The sleeve includes peripheral edges forming annular planes as viewed in the longitudinal direction of the shift fork shaft. Each of the gear pieces includes outer peripheral teeth to be meshed with inner peripheral teeth formed on an inner peripheral surface of the sleeve when the sleeve is moved in accordance with the gear shift operation. The shift fork shaft or the shift fork includes a restricting member that abuts to the peripheral edge so as to restrict a movement of the sleeve in a longitudinal direction.

Abstract: The present invention is provided with: a plurality of driving gears provided to an input shaft; driven gears which are provided to a first intermediate shaft, a second intermediate shaft, and a third intermediate shaft and which are always engaged with the driving gears; and a gear switching system that uses one of the driven gears and the driving gears as idler gears provided so as to be able to rotate idly with respect to the shafts to which said gears are provided, that uses the other of the driven gears and the driving gears as fixed gears that are fixed on the shafts to which said gears are provided, and that disengageably fixes an idler gear corresponding to one gear selected among a plurality of gears on the shaft to which the idler gear is provided.

Abstract: According to one embodiment, for example, a second support part of a first gear and a second surface of a roller of a roller bearing contact with each other to limit movement of the first gear to a first direction, and a first support part of a thrust bearing and a first surface of the roller contact with each other to limit movement of the roller bearing to the first direction.

Abstract: A dog clutch includes a rotating member including first dog teeth, an annular dog ring including second dog teeth, and an annular dog sleeve. The rotating member includes first protrusions protruding radially outwardly from the outer circumferences of crests or troughs of the first dog teeth, the dog sleeve includes second protrusions that are configured to come into contact with the first protrusions in a circumferential direction when the dog sleeve moves toward the rotating member in an axial direction, and the first dog teeth and the second dog teeth are disposed at positions at which the first dog teeth and the second dog teeth are able to be engaged with each other in the circumferential direction in a state in which the first protrusions and the second protrusions are in contact with each other.

Abstract: A transmission according to an embodiment includes a shift fork swingably supported by a case to move a movable element in an axial direction in accordance with the motion of a second shaft to two shift positions; two first protrusions provided on the second shaft and spaced apart from each other in the axial direction; and a second protrusion provided on the shift fork, and when the second shaft is in one of select positions, is positioned between the two first protrusions and overlaps with the first protrusions viewed from the axial direction. A protruding direction of the first protrusions and a protruding direction of the second protrusion are orthogonal to a swinging center of the shift fork when viewed in the axial direction. The second protrusion protrudes from the shift fork toward the swinging center. The second shaft is positioned between the second protrusion and the swinging center.

Abstract: A vehicle transmission has a plurality of gear positions that are to be selectively established, and includes: an input shaft; a first shaft; a second shaft; an output shaft; at least one first drive gear disposed on the first shaft; at least one second drive gear disposed on the second shaft; at least one driven gear disposed on the output shaft; a dog clutch connecting and disconnecting between the input shaft and each of the first and second shafts; and a synchronous meshing apparatus. The synchronous meshing apparatus connects and disconnects between each of the first and second shafts and the output shaft, and, when connecting between each of the first and second shafts and the output shaft, establishes a power transmission path from each of the first and second shafts to the output shaft via a selected one of the at least one first or second drive gear.

Abstract: A power transmission control apparatus for a vehicle c has a plurality of fork shafts coupled with “sleeves engageable with free-rotating gears”, including first and second fork shafts. When both the first and second fork shafts are in neutral positions, the first and second fork shafts are not coupled in the axial direction so that, while one fork shaft is maintained in its neutral position, the other fork shaft is movable by an actuator from its neutral position to its meshing position. When the one fork shaft is in its neutral position and the other fork shaft is in its meshing position, the first and second fork shafts are coupled in the axial direction so that, when the one fork shaft is moved from its neutral position to its meshing position by the actuator, the other fork shaft is simultaneously moved from its meshing position to its neutral position.