Honda Giken Kogyo Kabushiki Kaisha

Kiyokazu Okubo

Keiji Nemoto

Sunao Ishihara

Takayuki Yakou

Takahito Takekawa

Shizuo Ishikura

Yasushi Onuma

Hiroshi Nakayama

Tetsuro Hamada

Kentaro Arai

Kazunori Shibuya

Atsuhiro Sakai

Makoto Sumi

Herwig Leinfellner

Shinji Fujimoto

Hiroshi Takagishi

Shunji Sakuma

Kazumasa Shibuya

Kazufumi Hosoda

A changing system in a manual transmission is provided. An interlock plate is mounted on a shift-selecting shaft capable of being moved axially in response to a selecting operation and turned about an axis in response to a shifting operation, so that the interlock plate cannot be turned about an axis of the shift-selecting shaft. The interlock plate has a pair of side plate portions which are provided at locations spaced apart from each other in an axial direction of the shift-selecting shaft and through which the shift-selecting shaft extends. A shifting arm disposed between the side plate portions is fixed to the shift-selecting shaft. In such changing system, the shifting arm and an interlock member operatively connected to the shifting arm are interposed between the side plate portions of the interlock plate. Thus, the shifting arm can be used commonly in manual transmissions, in despite of a difference in number of forward speed stages between the manual transmissions, thereby providing a reduction in cost and avoiding an increase in weight due to a variation in number of forward speed stages.

Changing system in manual transmission

A gear shift apparatus for a manual transmission utilizes an actuator to prevent a miss shift manipulation from a forward gear stage to a reverse gear stage. The gear shift apparatus permits the driver to forcedly release a mis-shift preventing state with a smaller force. In the gear shift apparatus for a manual transmission, a select cam is responsive to a selecting manipulation to pivotally move to forward positions corresponding to forward select positions and a reverse position corresponding to a reverse select position. A restraint cam is driven to a prohibiting position by a plunger when a solenoid is energized to prohibit the select cam from pivotally moving to the reverse position. In this prohibiting state, as the select cam is pivotally moved toward a forward position in response to a manipulation for selecting a forward select position, a release protrusion of the select cam presses the restraint cam to pivotally move the same from the prohibiting state to a permitting position.

Gear shift apparatus for manual transmission

A power transmitting system for a four-wheel drive vehicle includes a first hydraulic pump driven interlockingly with the rotation of front wheels, a second hydraulic pump driven interlockingly with the rotation of rear wheels, and a hydraulic clutch for connecting the front wheels and rear wheels. The hydraulic clutch is adapted to be brought into an engaged state by an increase in oil pressure based on the difference between the amount of oil discharged from one of the hydraulic pumps and the amount of oil drawn into the other hydraulic pump. The hydraulic clutch, first hydraulic pump and second hydraulic pump are arranged in that sequence from the front toward rear of the vehicle on an axis extending longitudinally of the vehicle to maximize the air cooling effect on the hydraulic clutch and minimize the length of oil passages between the two hydraulic pumps.

Power transmitting system for four-wheel drive vehicle

A system for lubricating a transmission for a vehicle includes an auxiliary oil reservoir placed in the transmission case apart from transmission gears, an oil pump in the transmission case operated interlockingly with an output shaft of the transmission for pumping lubricating oil stored in the bottom of the case into the auxiliary oil reservoir, and a circulating means provided in the auxiliary oil reservoir for regulating the amount of oil circulated from the auxiliary oil reservoir into the transmission case, such that the amount of oil in the auxiliary oil reservoir is increased or decreased in accordance with a respective increase or decrease in the amount of oil discharged from the oil pump. This system allows the amount of lubricating oil stored in the transmission case to be reduced in accordance with an increase in vehicle speed, while ensuring the transmission is lubricated to a sufficient extent at all times by an oil splash scattered from the gears over the vehicle's full operating range, while avoiding attendant power loss and excessive rise in oil temperature which may otherwise result during high speed operation.

System for lubricating transmission for vehicle

A multiple-disk clutch apparatus including an input-side rotatable member having a clutch disk pressing surface, a pressure plate attached to the input-side rotatable member and disposed on an axially rear side opposing the pressing surface, a plurality of clutch disks disposed between the pressing surface and the pressure plate with an intermediate plate being interposed between the clutch disks, and a stopper member for restricting an axially rearward return position of the intermediate plate at the time of clutch disengagement. The stopper member is mounted on the input side rotatable member via a one-way mechanism which allows an axially forward movement of the stopper member but which restricts an axially rearward movement thereof. A holder for holding the one-way mechanism can be mounted on the input side rotatable member so as to be movable axially rearward against a spring. A restriction portion for restricting an axially forward movement of the holder can be formed in the input side rotatable member. A shock absorbing member can be interposed between the restriction portion and the holder.

Automatic wear adjustment multiple-disk clutch apparatus

A multi-stage gear shift transmission comprising a plurality of forward stage gear trains capable of being alternatively established, and a reverse stage gear train having an idle gear portion meshed with a reverse input gear and a reverse output gear. The forward stage and reverse stage gear trains are provided between an input shaft and an output shaft parallel to the inut shaft. A reverse stage establishing clutch mechanism is interposed in the middle of the reverse stage gear train. The idle gear portion is divided into a first idle gear meshed with the reverse input gear, and a second idle gear meshed with the reverse output gear and capable of being connected to the first idle gear through the reverse stage establishing clutch mechanism. The reverse stage establishing clutch mechanism comprises a sleeve which is engaged with the first idle gear for relative non-rotation and for axial relative movement and which is capable of being meshed with the second idle gear, a braking member which is disposed between the first and second idle gears for axial movement so that it may be urged toward the second idle gear in response to the movement of the sleeve toward the second idle gear and which is capable of being rotated in unison with the first idle gear, and a stationary part fixedly disposed to temporarily frictionally engage with the braking member when the braking member is moved toward the second idle gear.

Multi-stage gear shift transmission

A guide device for a release bearing used in a pull type friction clutch in which a cylindrical shaft portion projecting out of a transmission case in inserted into, and fitted in the inner periphery of, a release bearing of a clutch unit assembled to the crank shaft of an engine, and a release fork assembled to the transmission case is engaged with engagement portions formed on one of the release bearing members. Projecting pieces are formed on the one of the release bearing members. Each projecting piece extends outwards in a diametrical direction. Guide grooves are formed on the transmission case receiving the projecting pieces inserted thereinto from the axially front side of the cylindrical shaft portion keeping the release bearing member properly aligned while the clutch is being assembled.

Guide device for release bearing in pull type friction clutch

A vehicular transmission with a main speed change mechanism that has plural speeds and a sub speed change mechanism for establishing a very low speed. Shift forks for selectively changing gear trains mounted on shift fork shafts with the sub speed shift fork mounted on the same shaft as the shift fork for the lowest speed of the main speed change mechanism. The shift fork shafts supported on one end by the transmission case and on the other end by the clutch case. A lever forms part of the sub speed change mechanism and is pivotally mounted on the transmission case by a pivot pin installed from the outside of the transmission case.

Vehicular transmission shift mechanism

A four-wheel drive system with a multi-speed transmission connected to the vehicle engine, the output shaft of the transmission having a gear engaging a gear on casing of a differential for rotating same, the differential including the first pair of wheel axles of the vehicle, and a separate gear on the differential casing engaging an input gear in a transfer mechanism having a drive shaft to the second pair of wheel axles. The transfer mechanism includes a clutch and the input gear is rotatably supported on the casing as well as supporting the shaft having the clutch.

Four-wheel drive system

A vehicle transmission that has a main multi-speed gear change mechanism is provided with a sub speed gear change mechanism particularly useful for four wheel drive vehicles. The main gear change mechanism has parallel input and output shafts with the various gears and the sub speed gear change mechanism has an intermediate shaft and counter shaft parallel to the input and output shafts. An input gear on the intermediate shaft continually meshes with a gear on the input shaft and an output gear continually meshes with a gear on the output shaft. A gear reduction train and synchronizing mechanism selectively connects the input and output gears to establish that sub speed gear. The intermediate and counter shafts do not extend beyond the input and output shafts therefore minimizing the length of the transmission. The gear selecting mechanism allows selection of the sub speed only when the vehicle is in four wheel drive.

Vehicular transmission with additional low speed

A vehicular transmission having multiple gear trains including an ultra-low speed for all-wheel operation. A gear train selecting and shifting mechanism includes a select shaft and a shift shaft rotatably mounted perpendicular to each other. A shift piece slidably mounted on another shaft for engaging the shift forks for establishing the selected gear train. An arm is mounted on the select shaft for pivoting thereby and engages the shift piece for selecting the desired shift fork. Another arm is mounted on the shift shaft for pivoting thereby and engages the shift piece for causing shifting of the gear trains. Push-pull wires are provided from the driver's position for causing rotation of the select and shift shafts through external levers. An interlock plate prevents selection of the shift fork for the ultra-low speed unless a transfer gear clutch is engaged for all-wheel vehicle operation.

Vehicular transmission select and shift mechanism

A gear shift device for transmissions, comprising a plurality of gear shift rods provided with connecting members and clutch-actuating shift forks, the rods being arranged in parallel with one another and mounted to be movable in the lengthwise direction thereof, and a gear shift shaft provided with fingers engageable with the connecting members, the gear shift shaft being disposed at right angles to the gear shift rods and rotationally and axially movable around and along an axis thereof, the gear shift rods consisting of a plurality of groups of rods disposed in a plurality of positions which are spaced from each other along the axis of the gear shift shaft, the fingers being fixed to a plurality of spaced portions of the gear shift shaft so as to be opposed to the groups of gear shift rods.

Gear shift device for transmissions

A clutch mechanism for a power transmission system including one drive member and two driven members, in which at least one pair of roller clutch members are interposed between the drive member and two driven members so as to transmit power from the drive member to the driven members independently of each other. The clutch mechanism effectively performs conventional differential and differential-locking functions with a simplified construction.

Clutch mechanism for power transmission system

A clutch mechanism for a power transmission system including one drive member and two driven members, in which at least one pair of simple clutch members are interposed between the drive member and two driven members so as to transmit power from the drive member to the driven members independently of each other. The pair of clutch members may comprise a pair of pawls, rollers, or sprags. The clutch mechanism effectively performs conventional differential and differential-locking functions with a simplified construction.

A shifting apparatus for a transmission of a vehicle comprising a shift lever operable left and right for travel to selection positions and front and rear for shifting gears, the shift lever being shiftable in one of the selection positions between a forward gear position and a reverse gear position. A projection is movable with the shift lever vertically in the selection operation and horizontally in the shift operation. A pivotable lock member is positioned in the vertical path of travel of the projection and the lock member and projection are provided with cam surfaces such that the lock member is pivoted, when the projection is moved, from a neutral position to an inoperative position. The lock member is held in its neutral position by a spring and in the inoperative position the shift lever is movable to the forward gear position and to the reverse gear position. When the projection is moved to the selection position, the cam surfaces are cooperatively engaged to pivotably move the lock member to its inoperative position and if the shift lever should then be moved to the forward gear position, the lock member is then pivotably moved by the spring to its neutral position at which any movement of the shift lever to the reverse gear position will cause the projection to engage a claw on the lock member. A stop member is fixed in the path of travel of the lock member to prevent pivotal movement of the lock member in this position and thereby prevent travel of the shift lever to the reverse gear position.

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Wako, Japan

Kiyokazu Okubo