Patent application number | Description | Published |
20090241717 | MULTI-GEAR-SPEED TRANSMISSION - A multi-gear-speed transmission includes cam rods in sliding contact with an inner peripheral surface of an inner cavity of a gear shaft; pin members inserted in pin holes bored in the gear shaft in the radial directions and which are advanced or retreated by alternatedly making contact with the sliding contact surfaces of the cam rods and cam grooves. Swing claw members are rotatably supported on pivot pins provided in the gear shaft and which are advanced or retracted by the pin members to be engaged with or disengaged from gears (n). The swing claw members and the pivot pins are embedded in recessed parts formed in the outer periphery of the gear shaft, annular bearing collar members externally fitted over the gear shaft are arranged to press the pivot pins from the outer side, and the gears (n) are rotatably borne on the bearing collar members. | 10-01-2009 |
20090247342 | SADDLE TYPE VEHICLE WITH FORWARD/REVERSE CHANGEOVER MECHANISM - The forward/reverse travel changeover mechanism includes a projection formed by causing an output power shaft for outputting the power from a main transmission to project to the outside of a case, a carrier rotatably supported around the projection relative to a sun gear provided rotatably integrally with the projection, a planetary gear, an internal gear held in meshing engagement with the planetary gear, an output sprocket rotatably supported integrally with the internal gear and rotatable around the projection adjacent the main transmission with respect to the sun gear, and a shifter for selectively changing over the position of the carrier and the internal gear between a forward travel position at which the carrier and the internal gear are connected against relative rotation and a reverse travel position for preventing rotation of the carrier around the projection, and is disposed outside the main transmission case. | 10-01-2009 |
20100071492 | MULTISTAGE TRANSMISSION - A multistage transmission is provided that smoothly operates with a small force without the necessity of a shift clutch, that does not cause a loss of switching time during shifting, and that does not cause escape of a driving force as well as provides a small shift shock. When shift drive means executes upshift to a one-step-upper speed-change stage reduced in reduction ratio by one stage, normal rotation odd-numbered stage cam rods Cao and normal rotation even-numbered stage cam rods Cae alternately operate normal rotation odd-numbered stage engaging members Rao and the normal rotation odd-numbered stage engaging members Rae for shifting. | 03-25-2010 |
20100071493 | MULTISTAGE TRANSMISSION - A multistage transmission includes a swing claw member having a pin-receiving portion adapted to receive a pin member and an engaging claw portion on respective sides opposite to each other with respect to swing center, and swung by the advancement and retraction of the pin member to allow the engaging claw portion to establish engagement and release the engagement; and biasing means for biasing the swing claw member in a swing direction of bringing the engaging claw portion into engagement. The biasing means is a compression spring interposed between the inner surface of the engaging claw portion of the swing claw member and the opposing surface of the gear shaft. The multistage transmission uses multiple swing claw members of the same kind, instead of swing claw members of different kinds. | 03-25-2010 |
20100218630 | ARRANGEMENT STRUCTURE OF SHIFTING ACTUATOR OF INTERNAL COMBUSTION ENGINE MOUNTED ON MOTORCYCLE - An arrangement structure of a shifting actuator of an internal combustion engine mounted on a motorcycle is provided in which while the shifting actuator is provided externally of an engine case of the engine so as not to interfere with auxiliaries, it is protected without external protrusion and external appearance is kept satisfactory. An external wall of an engine case is partially inwardly recessed to form a recessed portion capable of accommodating a shifting actuator. An actuator body of the shifting actuator is disposed in the recessed portion. An attachment bracket attached to an end portion of the actuator body is fitted to a first fitting hole of an engine case outer lateral wall on the side of the recessed portion and is secured to the engine case outer wall. The motorcycle has a multistage transmission that can reduce its axial width to achieve compactness. | 09-02-2010 |
20100218635 | LUBRICATION STRUCTURE FOR MULTI-SPEED TRANSMISSION - A lubrication structure for a multi-speed transmission has a lubrication structure in which a gear shaft is provided with cam guide grooves in an inner cavity thereof. A lubricating oil is introduced into the inner cavity by way of oil feed introducing holes which are bored in one end portion of the gear shaft so as to provide communication between the inside and the outside of the gear shaft. The lubricating oil is led in the axial direction along the inner peripheral surface of the inner cavity by axial oil feed grooves formed by cutting along the inner peripheral surface of the inner cavity in parallel to the cam guide grooves. The lubricating oil is led out to the engagement switch-over mechanism by radial oil feed holes bored in radial directions so as to communicate with the axial oil feed grooves at axial-direction positions where pin members are located. | 09-02-2010 |
20110000333 | MULTI-STAGE TRANSMISSION - Disclosed is a multi-stage transmission which ensures that gear shifts are efficiently performed with a small number of component parts, smooth operations are performed with small forces, there are no loss of changeover time during gear shifts and no loss of the driving force, and the shift shock is small. The transmission has a driven gear shaft | 01-06-2011 |
20110000334 | MULTI-STAGE TRANSMISSION - A multi-stage transmission has driving gears m and driven gears n supported on a hollow driven gear shaft | 01-06-2011 |
20110005343 | MULTI-STAGE TRANSMISSION - Disclosed is a multi-stage transmission in which friction loss is reduced, which is simple in structure and which realizes an easy mounting or assembling work and a reduced work time. The multi-stage transmission has a drive gear shaft | 01-13-2011 |
20110011193 | MULTI-STAGE TRANSMISSION - Disclosed is a constantly-meshing-type multi-stage transmission which can be operated with small forces, does not need a clutch for gear shift, has no loss of changeover time at the time of gear shift, and in which a loss of the driving force is prevented. Driven gears n | 01-20-2011 |
20110023639 | MULTISTAGE TRANSMISSION - A multistage transmission includes a lost motion mechanism for regulating the operation for a downward shift in acceleration and for an upward shift in deceleration. Regulating rods are integrally moved with a control rod. A cutout into which a pin can be fitted together with a cam groove of the slidingly touched cam rod is formed corresponding to each cam groove in the regulating rods. The cutout of the regulating rods corresponding to the cam groove of the cam rod for normal rotation is formed longer than the corresponding cam groove on the reverse side to a moving direction of the control rod in an upward shift in a state in which shifted speed is established. The cutout of the regulating rods corresponding to the cam groove of the cam rod for reverse rotation is formed longer than the corresponding cam groove on the reverse side to a moving direction. | 02-03-2011 |
20110041636 | MULTI-STAGE TRANSMISSION - A multi-stage transmission has driving gears m and driven gears n supported on a hollow driven gear shaft | 02-24-2011 |