IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0283057
(2011-10-27)
|
등록번호 |
US-8695456
(2014-04-15)
|
발명자
/ 주소 |
- Fox, Matthew G.
- Morgensai, Keith E.
- Edler, Andrew N.
- McMillan, Patrick J.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
17 |
초록
▼
An electronically triggered locking differential includes a differential case, at least one pinion gear and a pair of side gears. A clutch pack is disposed between one of the side gears and the differential case and retards relative rotation between the differential case and the side gear. A cam mem
An electronically triggered locking differential includes a differential case, at least one pinion gear and a pair of side gears. A clutch pack is disposed between one of the side gears and the differential case and retards relative rotation between the differential case and the side gear. A cam member is disposed adjacent the clutch pack so that the clutch pack engages when the cam member ramps up. An engagement shaft has one end engaged with the cam member and an opposite end extending through the differential case and engaged with a sprocket. A magnetic coil and flux conductor magnetically couple the sprocket to the differential case when the coil is energized. This coupling retards rotation of the engagement shaft and the cam member relative to the gear case, initiating engagement of the clutch pack to lock the differential.
대표청구항
▼
1. An electronically triggered vehicle differential comprising: a differential case defining an axis of rotation and a gear chamber;at least one pinion gear acting as an input gear and first and second side gears acting as output gears, the pinion gear and first and second side gears disposed in the
1. An electronically triggered vehicle differential comprising: a differential case defining an axis of rotation and a gear chamber;at least one pinion gear acting as an input gear and first and second side gears acting as output gears, the pinion gear and first and second side gears disposed in the gear chamber, wherein at least one of the first and second side gears has a first cam surface;a clutch pack operable between an engaged condition to retard rotation between the differential case and the first and second side gears and a disengaged condition;a cam member having a second cam surface, wherein the cam member is axially movable in response to a relative rotation between the first and second cam surfaces to engage the clutch pack;an engagement shaft having a first end engaged with the cam member and a second end that extends through the differential case, wherein a spur gear is disposed on the second end, and wherein rotation of at least one of said first and second side gears relative to the differential case causes rotation of the engagement shaft along a shaft axis;a magnetic coil operable between a de-energized condition and an energized condition, wherein the magnetic coil generates magnetic flux when in the energized condition;a bearing race supporting the magnetic coil;a flux conductor disposed on the differential case;a sprocket coupled to the spur gear and disposed between the differential case and the flux collector, wherein the sprocket rotates about the axis of rotation of the differential case, wherein when the magnetic coil is in the energized condition, magnetic drag slows rotation of the sprocket relative to the differential case and thereby retards rotation of the engagement shaft about the shaft axis,wherein retarding rotation of the engagement shaft retards rotation of the cam member relative to the side gear, causing the first and second cam surfaces to rotate relative to each other, resulting in axial movement of the cam member to engage the clutch pack and lock the differential. 2. The electronically triggered locking differential of claim 1, wherein the magnetic coil operates between the energized and de-energized condition based on an external electrical signal. 3. The electronically triggered locking differential of claim 1, wherein the sprocket is made of a magnetic material and wherein the magnetic drag occurs between the sprocket and the flux conductor. 4. The electronically triggered locking differential of claim 1, wherein the bearing race is made of a magnetic material. 5. The electronically triggered locking differential of claim 4, wherein the bearing race has a pilot journal and a plurality of vertical supporting features, and wherein the bearing race has a plurality of air gaps. 6. The electronically triggered locking differential of claim 5, wherein said plurality of air gaps comprises first air gaps disposed in the pilot journal and second air gaps disposed in the vertical supporting features, wherein the first and second air gaps alternate with each other. 7. An electronically triggered locking differential comprising: a differential case defining an axis of rotation and a gear chamber;at least one pinion gear acting as an input gear and first and second side gears acting as output gears, the pinion gear and first and second side gears disposed in the gear chamber, wherein at least one of the first and second side gears has a first cam surface;a clutch pack operable between an engaged condition to retard rotation between the differential case and the first and second side gears and a disengaged condition;a cam member having a second cam surface, wherein the cam member is axially movable in response to a relative rotation between the first and second cam surfaces to engage the clutch pack;an engagement shaft having a first end directly engaged with the cam member and a second end that extends through the differential case, wherein a spur gear is disposed on the second end, and wherein rotation of at least one of said first and second side gears relative to the differential case causes rotation of the engagement shaft along a shaft axis;a magnetic coil operable between a de-energized condition and an energized condition, wherein the magnetic coil generates magnetic flux when in the energized condition;a bearing race supporting the magnetic coil;a flux conductor disposed on the differential case;a sprocket coupled to the spur gear and disposed between the differential case and the flux collector, wherein the sprocket rotates about the axis of rotation of the differential case, wherein when the magnetic coil is in the energized condition, magnetic drag slows rotation of the sprocket relative to the differential case and thereby retards rotation of the engagement shaft about the shaft axis,wherein retarding rotation of the engagement shaft retards rotation of the cam member relative to the side gear, causing the first and second cam surfaces to rotate relative to each other, resulting in axial movement of the cam member to engage the clutch pack and lock the differential. 8. The electronically triggered locking differential of claim 7, wherein the magnetic coil operates between the energized and de-energized condition based on an external electrical signal. 9. The electronically triggered locking differential of claim 7, wherein the sprocket is made of a magnetic material and wherein the magnetic drag occurs between the sprocket and the flux conductor. 10. The electronically triggered locking differential of claim 7, wherein the bearing race is made of a magnetic material. 11. The electronically triggered locking differential of claim 10, wherein the bearing race has a pilot journal and a plurality of vertical supporting features, and wherein the bearing race has a plurality of air gaps. 12. The electronically triggered locking differential of claim 11, wherein said plurality of air gaps comprises first air gaps disposed in the pilot journal and second air gaps disposed in the vertical supporting features, wherein the first and second air gaps alternate with each other. 13. An electronically triggered locking differential comprising: a differential case defining an axis of rotation and a gear chamber;at least one pinion gear acting as an input gear and first and second side gears acting as output gears for rotation with respective axle shafts, the pinion gear and first and second side gears disposed in the gear chamber, wherein at least one of the first and second side gears has a first cam surface;a clutch pack operable between an engaged condition to retard rotation between the differential case and the first and second side gears and a disengaged condition;a cam member having a second cam surface, wherein the cam member is axially movable in response to a relative rotation between the first and second cam surfaces to engage the clutch pack;an engagement shaft having a first end engaged with the cam member and a second end that extends through the differential case, wherein a spur gear is disposed on the second end, and wherein rotation of at least one of said first and second side gears relative to the differential case causes rotation of the engagement shaft along a shaft axis;a magnetic coil operable between a de-energized condition and an energized condition, wherein the magnetic coil generates magnetic flux when in the energized condition;a bearing race supporting the magnetic coil;a flux conductor disposed on the differential case;a sprocket coupled to the spur gear and disposed between the differential case and the flux collector, wherein the sprocket rotates about the axis of rotation of the differential case, wherein when the magnetic coil is in the energized condition, magnetic drag slows rotation of the sprocket relative to the differential case and thereby retards rotation of the engagement shaft about the shaft axis,wherein retarding rotation of the engagement shaft retards rotation of the cam member relative to the side gear, causing the first and second cam surfaces to rotate relative to each other, resulting in axial movement of the cam member to engage the clutch pack and lock the differential. 14. The electronically triggered locking differential of claim 13, wherein the magnetic coil operates between the energized and de-energized condition based on an external electrical signal. 15. The electronically triggered locking differential of claim 13, wherein the sprocket is made of a magnetic material and wherein the magnetic drag occurs between the sprocket and the flux conductor. 16. The electronically triggered locking differential of claim 13, wherein the bearing race is made of a magnetic material. 17. The electronically triggered locking differential of claim 16, wherein the bearing race has a pilot journal and a plurality of vertical supporting features, and wherein the bearing race has a plurality of air gaps. 18. The electronically triggered locking differential of claim 17, wherein said plurality of air gaps comprises first air gaps disposed in the pilot journal and second air gaps disposed in the vertical supporting features, wherein the first and second air gaps alternate with each other.
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