Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Tokyo Jidosha Kogyo Kabushiki Kaisha

Shuichiro Ida

Shuji Nagano

Toshio Yoshinaka

Hideo Hamano

Keiji Takeshita

Yoshitaka Sogo

Toshikatsu Taniguchi

Hakumi Ishii

Shigeru Kimura

Yasumichi Funato

Takaaki Suzuki

Shoji Haga

Ichiro Horiuchi

Toshikazu Koide

Shoichi Ohshima

Mitsufumi Nishu

Shozo Okuda

Junichi Hotta

Yasuo Tanaka

Katsumi Shimizu

Hiroomi Fukaya

Syoiti Oshima

Shoichi Ooshima

An electric control apparatus for a transfer device in a part-time four-wheel drive vehicle is arranged to permit switchover of the transfer device from the two-wheel drive mode to the four-wheel drive mode when a difference in rotational speed between front and rear propeller shafts is smaller than a predetermined value and to prohibit switchover of the transfer device from the two-wheel drive mode to the four-wheel drive mode when the difference in rotational speed between the front and rear propeller shafts is larger than the predetermined value.

Electric control apparatus for transfer device in part-time four-wheel

In a power transfer device including a housing, an input shaft rotatably mounted within the housing, an output shaft rotatably mounted within the housing and arranged coaxially with the input shaft for relative rotation thereto, a planetary gear unit arranged within the housing and having an input element mounted on the input shaft for rotation therewith and an output element connectable to the output shaft, and a clutch sleeve axially slidably mounted on the output shaft and shiftable between a first position in which it is retained to effect a drive connection between the input and output shafts and a second position in which it is retained to effect a drive connection between the output element of the gear unit and the output shaft, an oil pump assembly is arranged in parallel with the input shaft and mounted on an internal wall of the housing to be driven by the output element of the gear unit to pump up lubricating oil stored within the housing and supply it into an axial bore in the input shaft through an oil passage formed in a peripheral wall of the housing.

Lubrication mechanism in power transfer device for four wheel drive

A manually operated change-speed mechanism in a power transfer device includes input and output shafts arranged coaxially to each other for relative rotation, a planetary gear unit mounted on the input shaft and having an input element mounted on the input shaft for rotation therewith and an output element connectable to the output shaft, an internally splined clutch sleeve axially slidably mounted on an externally splined portion of the output shaft and shiftable between a first position in which it is engaged with the output element of the gear unit and a second position in which it is engaged with an externally splined portion of the input shaft, wherein a synchronizer assembly is arranged to effect synchronous engagement between the clutch sleeve and the externally splined portion of the input shaft in shifting operation of the clutch sleeve toward the second position.

Manually operated change-speed mechanism in power transfer device

A power transfer device includes a planetary gear unit which includes a sun gear, a carrier, a ring gear, and a plurality of planet gears journaled on the carrier and in mesh with the sun and ring gears. The planetary gear unit is shiftable between first, second and third positions to establish a high speed two-wheel drive mode in the first position wherein the carrier is engaged with an input shaft and a first output shaft, and the sun gear is engaged with a second output shaft, and the ring gear is disengaged. The planetary gear unit is arranged to establish a high speed four-wheel drive mode in the second position wherein the carrier is engaged with the input shaft and the first output shaft, and the sun gear is engaged with the input shaft and the second output shaft, and the ring gear is disengaged to restrict differential action between the output shafts and is further arranged to establish a low speed four-wheel drive mode in the third position wherein the sun gear is engaged with the input shaft, the carrier is engaged with the output shafts, and the ring gear is locked to restrict the differential action.

Power transfer device for four-wheel drive vehicles

A power transfer device includes a planetary gear unit which includes a sun gear, a carrier, a ring gear, and a plurality of planet gears journaled on the carrier and in mesh with the sun and ring gears. The planetary gear unit is shiftable between first, second and third positions to establish a high speed four-wheel drive mode in the first position wherein the carrier is engaged with an input shaft, and the sun and ring gears are each engaged with a pair of coaxial output shafts to permit differential action between the output shafts. The planetary gear unit is arranged to establish a high speed four-wheel drive mode in the second position wherein the carrier is engaged with the input shaft and one of the output shafts, and the sun gear is engaged with the input shaft and the other output shaft to restrict the differential action and is further arranged to establish a low speed four-wheel drive mode in the third position wherein the sun gear is engaged with the input shaft, the carrier is engaged with the output shafts, and the ring gear is locked to restrict the differential action.

A transfer unit in an automobile for selectively transferring the drive power to wheels from a two-wheel-drive state to a four-wheel-drive state, and vice versa, having a vacuum-operated actuator. The actuator is secured to the transfer case by a cylindrical fitting so that a transfer shaft can extend from the transfer case to the actuator body and so that oil in the transfer case will flow to the actuator body.

Diaphragm actuator mounting on a transfer case

The device for fixing a plug and the like comprises a spring member which is constituted by a plurality of radially deformable claws with their free ends engageable with an arresting stepped portion formed in an inserting hole in which the plug is fixed and a body integral with the claws and deformable in the direction in which the plug is urged so as to position the plug in position.

Fixed plug assembly

In a power transfer device including an input shaft rotatably mounted within a housing, a first output shaft rotatably supported on the housing for connecting the input shaft to a pair of front wheel drive axles, and a second output shaft arranged in parallel with the first output shaft and rotatably supported on the housing for drive connection to a pair of rear wheel drive axles, a shift mechanism includes a sleeve member axially slidable on the first output shaft between respective positions in which it effects a drive connection or disconnection between the output shafts, a shift rod arranged in parallel with the output shafts and axially movably supported on the housing, a shift fork mounted on the shift rod and coupled with the sleeve member, an operation rod extending through the peripheral wall of the housing and rotatably supported therethrough, the operation rod having an outer end operatively connected to a manual operation lever, and a swing arm secured to the inner end of the operation rod for rotation therewith and engaged at one end portion thereof with a recessed portion formed on the shift rod to restrict axial movement of the operation rod outwardly with respect to the housing and to restrict rotation of the shift rod.

Power transfer device for automotive vehicles

A shift mechanism in a power transfer device includes first and second shift rods axially slidably mounted in parallel to each other within a housing of the transfer device, an interlock mechanism arranged to selectively retain the shift rods in their shifted positions, an operation rod extending through the wall of the housing and rotatably supported therethrough, the operation rod having an outer end operatively connected to a manually operated transfer lever and an inner end located in the interior of the housing, and a swing lever pivoted to the inner end of the operation rod at a position displaced in a predetermined distance from the axis of the operation rod, the swing lever having one end portion engaged with the first shift rod and the other end portion engaged with the second shift rod. In the shift mechanism, the axial movement amount of the first shift rod is determined to be substantially the same as that of the second shift rod, and the distance between the pivot axis of the swing lever and the other end portion of the same in engagement with the second shift rod is determined to be smaller than the distance between the pivot axis of the swing lever and the one end portion of the same in engagement with the first shift rod.

Shift mechanism in power transfer device

A power transfer device adapted for use in combination with a power transmission. The transfer device includes a housing, an input shaft rotatably mounted within the housing for drive connection to an output shaft of the transmission, an output shaft rotatably mounted within the housing for rotation relative to the input shaft, a planetary gear unit arranged within the housing and having an input element mounted on the input shaft for rotation therewith and an output element connectable to the output shaft, and a sleeve member axially slidably mounted on the output shaft and shiftable between a first position in which it effects a drive connection between the input and output shafts and a second position in which it effects a drive connection between the output element of the gear unit and the output shaft. A bearing retainer is secured to the housing to retain a bearing carried on the housing for supporting thereon the input shaft, and an oil pump assembly is contained within a cavity of the bearing retainer and mounted on the input shaft at the outside of the housing to be driven by rotation of the input shaft. The pump assembly is arranged to pump up lubricating oil stored in the housing and supply it into an axial bore in the input shaft.

In combination with a power transmission, a power transfer device comprises a first shaft rotatably mounted within a housing and having an input end for connection to an output shaft of the transmission and an output end for drive connection to a pair of rear-wheel axles, a second shaft rotatably mounted within the housing in parallel with the first shaft for drive connection to a pair of front-wheel axles, a drive gear rotatably mounted on the first shaft and connectable to the first shaft, a driven gear rotatably mounted on the second shaft and connectable to the second shaft, the driven gear being drivingly connected to the drive gear, and a pair of sleeves each mounted on the first and second shafts and shiftable between a first position where both the clutch sleeves are retained to connect the drive and driven gears to the first and second shafts and a second position where both the clutch sleeves are retained to disconnect the drive and driven gears from the first and second shafts, whereby both the drive and driven gears are stilled when two wheel drive is selected at the transfer device.

Power transfer device for four-wheel drive

A power transfer device includes an input shaft for connection to an output shaft of a power transmission, a first output shaft rotatably coupled at the inner end thereof with the input shaft, a second output shaft arranged in parallel with the input and first output shafts, an output member rotatably mounted on the first output shaft and being operatively connected to the second output shaft, a planetary gear unit mounted on the input shaft and having an input member connected with the input shaft and an output element for providing a low speed drive power train, a first sleeve member mounted on the first output shaft between the planetary gear unit and the output member and shiftable between a first position where the first sleeve member is retained to connect the first output shaft to the input shaft and a second position where the first sleeve member is retained to connect the first output shaft to the output element of the planetary gear unit, and a second sleeve member mounted on the first output shaft between the first sleeve member and the output member and shiftable between a first position where the second sleeve member is retained to connect the output member to the first output shaft and a second position where the second sleeve member is retained to disconnect the output member from the first output shaft.

The mounting of a speed meter drive gear for an automobile is improved. That is, the speed meter drive gear is provided on an outer circumferential surface of a connecting member for transmitting a driving force such as to a companion flange mounted to an output shaft of a transmission. With this arrangement, a shaft length of the output shaft of the transmission may be shortened, thereby preventing creation of vibration, making the drive gear lightweight, and decreasing a joint angle of a propeller shaft.

Speed meter drive device for automobile

A shift mechanism for a change-speed gearing in a power transmission which includes a pneumatic or hydraulic actuator, a shift rod axially slidably carried on a support structure and operatively connected at a first end thereof with the actuator for reciprocating movement, and a mechanism for selectively establishing a drive power gear train in the transmission in response to the reciprocating movement of the shift rod. The support structure is formed at one side thereof with a cylindrical portion in which an axial bore is formed coaxially with the shift rod to contain a second end of the shift rod, and a plug is detachably threaded into the cylindrical portion of the support structure to close the axial bore. The plug is associated with a retainer element for retaining the shift rod in its rearward position by engagement with a second end of the shift rod.

Shift mechanism for change-speed gearing in power transmission

A change-speed gearing assembly including upper and lower bearings carried on a partition wall of a casing for the assembly respectively for supporting thereon input and counter shafts, and a bearing retainer secured in a fluid-tight manner to the outside face of the partition wall to retain both the bearings in place. The input shaft extends outwardly through an annular seal member carried on the upper portion of the bearing retainer coaxially with the upper bearing. The bearing retainer is formed with upper and lower cavities and is formed at one side thereof with a vertical groove which opens at its upper end into a side portion of the upper cavity located above the lower edge of the seal member and at its lower end into the upper portion of the lower cavity to maintain the level of lubricating oil in the upper cavity above the lower edge of the seal member.

Growing community of inventors

Toyota, Japan

Shuichiro Ida