Hybrid drive device

Patent metadata

Field	Value
Publication number	US-9284882-B2
Application number	US-201314361908-A
Country	US
Kind code	B2
Filing date	Feb 8, 2013
Priority date	Feb 10, 2012
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A hybrid drive device having a clutch that engages and disengages an output member of an internal combustion engine and an input shaft of an automatic transmission device with and from each other. A rotary electric machine has a stator fixed to a case and a rotor coupled to the input shaft of the automatic transmission device. The rotary electric machine is disposed radially outwardly of the clutch so as to at least partially overlap the clutch in an axial direction as seen from a radial direction. Lubricating oil is supplied from the input shaft of the automatic transmission device to the clutch and the hybrid drive device includes a shield portion that allows the lubricating oil to bypass the rotary electric machine and leads the lubricating oil supplied to the clutch to an oil reservoir.

First claim

The invention claimed is:

1. A hybrid drive device comprising:
a clutch that engages and disengages an output member of an internal combustion engine and an input shaft of an automatic transmission device with and from each other;
a rotary electric machine that has a stator fixed to a case and a rotor coupled to the input shaft of the automatic transmission device, and
a rotor support member that has a cylindrical portion that holds the rotor, a flange portion that extends radially inwardly from the cylindrical portion, and a hub portion supported on the case via a bearing at a radially inner end portion of the flange portion, wherein:
the rotary electric machine is disposed radially outwardly of the clutch so as to at least partially overlap the clutch in an axial direction as seen from a radial direction;
lubricating oil is supplied from the input shaft of the automatic transmission device to the clutch;
the hybrid drive device includes a shield portion that allows the lubricating oil to bypass the rotary electric machine and leads the lubricating oil supplied to the clutch to an oil reservoir, the shield portion being a cover member that covers a coil end disposed on one side of the stator;
the clutch is disposed on one side of the flange portion in the axial direction and radially inwardly of the cylindrical portion; and
the lubricating oil from the input shaft is supplied to the clutch, and further led by the cylindrical portion and the cover member to be discharged to the oil reservoir.

2. A hybrid drive device comprising:
a clutch that engages and disengages an output member of an internal combustion engine and an input shaft of an automatic transmission device with and from each other, lubricating oil being supplied from the input shaft of the automatic transmission device to the clutch;
a rotary electric machine that has a stator fixed to a case and a rotor coupled to the input shaft of the automatic transmission device, the rotary electric machine being disposed radially outwardly of the clutch so as to at least partially overlap the clutch in an axial direction as seen from a radial direction;
a rotor support member that supports the rotor and that has an oil hole through which the lubricating oil supplied to the clutch flows out;
a shield portion that allows the lubricating oil to bypass the rotary electric machine; and
a discharge passage through which the lubricating oil flowing out through the oil hole is discharged to an oil reservoir, the shield portion leading the lubricating oil flowing out through the oil hole to the discharge passage, wherein
the lubricating oil flowing out through the oil hole bypasses the rotary electric machine and is discharged to the oil reservoir through the shield portion and the discharge passage.

3. The hybrid drive device according to claim 2 , wherein:
the rotor support member has a cylindrical portion to which the rotor is mounted, and first and second flange portions that extend in a radially inner direction from the cylindrical portion, the first flange portion having the oil hole formed in a radially outer portion thereof;
a clutch chamber that houses the clutch is formed between the first and second flange portions of the rotor support member; and
the lubricating oil is supplied from the input shaft toward the clutch chamber.

4. The hybrid drive device according to claim 3 , further comprising:
a valve that switches a flow rate of the lubricating oil to be supplied to the clutch between a high flow rate and a low flow rate, wherein
the oil hole in the rotor support member is set such that the lubricating oil flows out through the oil hole at a flow rate that is lower than the high flow rate and higher than the low flow rate.

5. The hybrid drive device according to claim 2 , wherein
the shield portion has an annular flanged portion that projects in the axial direction from the case, and a projection provided at a distal end of the flanged portion in at least a lower portion of the flanged portion to project in a radially inner direction so as to be proximate to a distal end of the cylindrical portion of the rotor support member.

6. The hybrid drive device according to claim 5 , wherein
the projection is disposed radially outwardly of the distal end of the cylindrical portion of the rotor support member so as to at least partially overlap the distal end of the cylindrical portion of the rotor support member as seen from the radial direction.

7. The hybrid drive device according to claim 2 , wherein:
the shield portion has an annular shape, and a space defined by the shield portion, the rotor support member, and the case is formed; and
the discharge passage is formed in the case with an upper end of the discharge passage opening in a bottom portion of the space, and the lubricating oil flowing into the space through the oil hole flows into the discharge passage through the opening.

8. The hybrid drive device according to claim 2 , wherein
the shield portion has a flanged portion integrally formed with the case, and ribs formed to extend radially inwardly of the flanged portion.

9. The hybrid drive device according to claim 1 , wherein:
the clutch has a clutch drum coupled to the input shaft, a clutch hub coupled to the output member, outer friction plates splined to the clutch drum, inner friction plates splined to the clutch hub, and a hydraulic servo disposed in the clutch drum to engage and disengage the outer friction plates and the inner friction plates with and from each other;
an outer peripheral surface of the clutch drum is formed with splines and a through hole, and the cylindrical portion of the rotor support member is engaged with the clutch drum through the splines so as to rotate together with the clutch drum; and
the lubricating oil from the input shaft flows out of the clutch drum through a gap between a distal end of the clutch drum and the flange portion, the splines, and the through hole, and is further led by the cover member to be discharged to the oil reservoir.

10. The hybrid drive device according to claim 1 , further comprising:
a valve that switches a flow rate of the lubricating oil to be supplied to the clutch between a high flow rate and a low flow rate, wherein:
the clutch is controlled to a disengaged state, a slip state, and a completely engaged state; and
the valve is switched to the low flow rate when the clutch is in the disengaged state and the completely engaged state, and to the high flow rate when the clutch is in the slip state.

11. The hybrid drive device according to claim 2 , further comprising:
a valve that switches a flow rate of the lubricating oil to be supplied to the clutch between a high flow rate and a low flow rate, wherein:
the clutch is controlled to a disengaged state, a slip state, and a completely engaged state; and
the valve is switched to the low flow rate when the clutch is in the disengaged state and the completely engaged state, and to the high flow rate when the clutch is in the slip state.

Assignees

• Aisin Aw Co

Inventors

• Kasuya Satoru
• Kito Masashi
• Seki Yuichi
• Kondo Ryosuke

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• F02B63/042 Primary

  Rotating electric generators · CPC title

• F16D25/0638

  with more than two discs, e.g. multiple lamellae · CPC title

• Y10T74/19014

  Plural prime movers selectively coupled to common output · CPC title

• Y02T10/6221

  Cross-Sectional Technologies · mapped topic