Oil passage structure for power transmission device

Patent metadata

Field	Value
Publication number	US-10371248-B2
Application number	US-201715729161-A
Country	US
Kind code	B2
Filing date	Oct 10, 2017
Priority date	Oct 14, 2016
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

In an oil passage structure for a power transmission device including a case provided to accommodate a power transmission device, a baffle plate attached to an inner wall of the case, and an oil pump, the oil passage structure includes a supply oil passage through which oil is pumped from the oil pump to an oil supply destination via the baffle plate. A plate oil passage, which constitutes a portion of the supply oil passage, a supply port, which allows the oil discharged from the oil pump to flow into the plate oil passage through the supply port, and a first discharge port, which allows the oil supplied to the oil supply destination to be discharged through the first discharge port, are formed in the baffle plate.

First claim

What is claimed is:

1. An oil passage structure for a power transmission device, the oil passage structure comprising:
a case provided to accommodate the power transmission device;
a baffle plate attached to an inner wall of the case;
an oil pump; and
a supply oil passage through which oil is pumped from the oil pump to an oil supply destination via the baffle plate, the baffle plate having a plate oil passage, a supply port and a discharge port, the plate oil passage being an oil passage that constitutes a portion of the supply oil passage, the supply port being configured to allow the oil discharged from the oil pump to flow into the plate oil passage through the supply port, and the discharge port being configured to allow the oil supplied to the oil supply destination, to be discharged from the plate oil passage through the discharge port, wherein:
the oil supply destination includes a first oil supply destination and a second oil supply destination at different positions inside the case;
the discharge port includes a first discharge port that allows the oil supplied to the first oil supply destination to be discharged through the first discharge port, and a second discharge port that allows the oil supplied to the second oil supply destination to be discharged through the second discharge port; and
the plate oil passage branches to a second oil passage that leads from the supply port to the first discharge port, and a third oil passage that leads from the supply port to the second discharge port.

2. The oil passage structure according to claim 1 , wherein:
the plate oil passage is an oil passage that allows the oil to be supplied through the oil passage to a lubrication-needing portion where lubrication by the oil is needed in the power transmission device;
the first oil supply destination is a constituent element of a differential gear mechanism included in the power transmission device;
the second oil supply destination is a constituent element separate from the differential gear mechanism in the power transmission device;
the first discharge port is provided at a position where oil is directly supplied to the first supply destination; and
the second discharge port is provided at a position where oil is directly supplied to the second supply destination.

3. The oil passage structure according to claim 2 , wherein:
the oil supply destination further includes a third oil supply destination that is a differential pinion gear and a differential side gear that constitute the differential gear mechanism;
the discharge port further includes a third discharge port provided at a position where oil is directly supplied to the third oil supply destination;
the plate oil passage branches to a second oil passage that leads from the supply port to the first discharge port, and a fourth oil passage that leads from the supply port to the third discharge port;
the first supplied oil portion is a differential bearing that supports a differential case accommodating the differential pinion gear and the differential side gear on the case; and
the baffle plate is disposed so as to cover the differential case.

4. The oil passage structure according to claim 1 , wherein:
the plate oil passage is a lubricating oil passage that allows oil to be supplied through the lubricating oil passage to a constituent element of a differential gear mechanism included in the power transmission device, and an oil passage that allows hydraulic pressure of oil to be supplied through the oil passage to a hydraulic actuator included in the power transmission device;
the baffle plate is provided on an axis where the differential gear mechanism is disposed;
the first oil supply destination is a constituent element of the differential gear mechanism;
the second oil supply destination is the hydraulic actuator; and
the first discharge port is provided at a position where oil is directly supplied to the first supply destination.

5. The oil passage structure according to claim 1 , wherein a direction in which the supply port opens is a direction opposite to a direction in which the first discharge port opens.

6. The oil passage structure according to claim 4 , wherein a direction in which the supply port opens is the same as a direction in which the second discharge port opens.

7. The oil passage structure according to claim 1 , wherein the plate oil passage is an oil passage that passes through an inside of the baffle plate.

8. The oil passage structure according to claim 1 , wherein the baffle plate has a second plate oil passage that is an oil passage independent from the plate oil passage, the second plate oil passage is configured to allow oil to be pumped through the second plate oil passage to an oil supply destination different from the oil supply destination via the plate oil passage.

9. The oil passage structure according to claim 1 , wherein:
the baffle plate includes a plate-shaped plate body and a tubular member integrated with the plate body; and
the plate oil passage is an oil passage formed by the tubular member.

10. An oil passage structure for a power transmission device, the oil passage structure comprising:
a case provided to accommodate the power transmission device;
a baffle plate attached to an inner wall of the case;
an oil pump; and
a supply oil passage through which oil is pumped from the oil pump to an oil supply destination via the baffle plate, the baffle plate having a plate oil passage, a supply port and a discharge port, the plate oil passage being an oil passage that constitutes a portion of the supply oil passage, the supply port being configured to allow the oil discharged from the oil pump to flow into the plate oil passage through the supply port, and the discharge port being configured to allow the oil supplied to the oil supply destination, to be discharged from the plate oil passage through the discharge port, wherein:
the power transmission device includes a transmission, a counter gear mechanism, and a differential gear mechanism;
the oil pump is a mechanical oil pump which is driven by engine torque transmitted to the mechanical oil pump via the power transmission device; and
the plate oil passage is provided so as to pass between a rotary shaft of the transmission and a rotary shaft of the differential gear mechanism.

11. An oil passage structure for a power transmission device, the oil passage structure comprising:
a case provided to accommodate the power transmission device;
a baffle plate attached to an inner wall of the case;
an oil pump; and
a supply oil passage through which oil is pumped from the oil pump to an oil supply destination via the baffle plate, the baffle plate having a plate oil passage, a supply port and a discharge port, the plate oil passage being an oil passage that constitutes a portion of the supply oil passage, the supply port being configured to allow the oil discharged from the oil pump to flow into the plate oil passage through the supply port, and the discharge port being configured to allow the oil supplied to the oil supply destination, to be discharged from the plate oil passage through the discharge port, wherein:
the power transmission device includes a transmission, a counter gear mechanism, and a differential gear mechanism; and
the plate oil passage is provided so as to pass between a rotary shaft of the counter gear mechanism and a rotary shaft of the differential gear mechanism.

12. An oil passage structure for a power transmission device, the oil passage structure comprising:
a case provided to accommodate the power transmission device;
a baffle plate attached to an inner wall of the case

Assignees

• Toyota Motor Co Ltd

Inventors

• Kawakami Takaho
• Tabuchi Motoki

Classifications

• F16H2061/0037

  characterised by controlled fluid supply to lubrication circuits of the gearing · CPC title

• F16H57/0457

  Splash lubrication · CPC title

• F16H57/0471

  Bearing · CPC title

• F16H57/0446

  the supply forming part of the transmission control unit, e.g. for automatic transmissions · CPC title

• F16H57/0445

  for supply of different gearbox casings or sections · CPC title