Automatic transmission for a motor vehicle
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorToshio Kobayashi
Life of this patent
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Abstract
An automatic transmission of a trans-axle type in which an input shaft is disposed above a differential across an axle of a vehicle. A case for the transmission is divided into a differential case for mounting a differential and a transmission case for an automatic transmission device. A bearing plate is disposed between the differential case and the transmission case. A drive pinion formed on an end of a drive pinion shaft is engaged with a ring gear of the differential. The drive pinion shaft is rotatably mounted in the bearing plate by a bearing, and an oil pump is provided in the bearing plate around the input shaft.
Claims17
In an automatic transmission having an automatic transmission device, an oil pump for supplying hydraulic oil to the automatic transmission device, an input shaft mounted on the transmission device operatively connected with a crankshaft of an engine through a torque converter, a differential mounted between the torque converter and the transmission device and below the input shaft, a ring gear provided on the differential, and a drive pinion shaft provided on the transmission device forming a drive pinion gear engaging with the ring gear to transmit an output of the transmission device to the differential, the improvement of the system comprising:
- a differential case defining a differential chamber for mounting the differential and adapted for containing oil for lubricating said differential;
- a transmission case defining a transmission chamber for mounting the automatic transmission device and adapted for containing other oil to lubricate the automatic transmission device;
- bearing means for rotatably mounting said drive pinion shaft and including a pair of inner races secured to the drive pinion shaft, an adjustable outer race forming a flange member, and rollers disposed between said inner and outer races;
- bearing plate means for securing said differential case and the transmission case and forming a recess and an opening to mount said oil pump and said bearing means therein respectively;
- adjusting means mounted on the drive pinion shaft for adjusting the inner races;
- partitioning means for providing a partitioning between said differential and transmission chambers and comprising said bearing means, said adjusting means and a retainer secured to the bearing means;
- and
- sealing means mounted between said adjusting means and said retainer adapted for sealing off said oil and the other oil to prevent mixing of said oils with each other, so as to enable appropriate lubrication of said differential and transmission device, respectively.
In an automatic transmission having an automatic transmission device, an oil pump for supplying hydraulic oil to the automatic transmission device, the latter having an input shaft for operatively connecting with a crankshaft of an engine through a torque converter, a differential mounted between the torque converter and the automatic transmission device and below the input shaft, the differential having a ring gear, and a drive pinion shaft as an output member of the transmission device having a drive pinion gear engaging thereon with the ring gear, the improvement comprising,
- a differential case forming a differential chamber mounting said differential and adapted for containing oil for lubricating said differential,
- a transmission case forming a transmission chamber for mounting said automatic transmission device and adapted for containing other oil to lubricate the automatic transmission device,
- bearing means for rotatably mounting said drive pinion shaft and including a pair of inner races comprising a front inner race and a rear inner race secured to the drive pinion shaft, an outer race forming a flange member at a side thereof facing the differential case, and rollers disposed between said pair of inner races and said outer race,
- bearing plate means for partitioning and securing said differential case and said transmission case and being formed with openings and a recess for mounting said oil pump in said recess and said bearing means in one of said openings,
- shim means provided between said bearing plate means and said flange member of the outer race for adjusting an engaging position of the drive pinion gear with the ring gear in axial direction of the drive pinion shaft,
- adjusting means comprising sleeve means mounted on the drive pinion shaft for adjusting the inner races,
- partitioning means for providing a partitioning between said differential and transmission chambers and comprising said bearing means, said adjusting means and a retainer secured to the bearing means, and
- oil sealing means mounted between said adjusting means and said retainer adapted for sealing off said oil and the other oil to prevent mixing of said oils with each other, so as to enable appropriate lubrication of said differential and transmission device, respectively.
Dependencies are inferred from the claim text.