High ratio traction drive transmission
US-11092214-B2 · Aug 17, 2021 · US
Traction device
US11306802B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11306802-B2 |
| Application number | US-201917044811-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 2, 2019 |
| Priority date | Apr 2, 2018 |
| Publication date | Apr 19, 2022 |
| Grant date | Apr 19, 2022 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A traction device including a ring member, a carrier, and a sun member and an electric motor, wherein the electric motor is coupled to at least one of the ring member, the carrier, and the sun member.
First claim
Opening claim text (preview).
What may be claimed is: 1. A traction drive transmission, comprising: a ring member having a rotational center aligned along a main axis of the transmission; a first traction roller in contact with the ring member; a sun member having a rotational center offset from the main axis, the sun member in contact with the first traction roller, the sun member located radially inward of the first traction roller; a first floating traction roller in contact with the ring member and the sun member; a first reaction roller in contact with the first floating traction roller; a carrier configured to support the reaction roller, the carrier configured to be non-rotatable; and a second reaction roller supported in the carrier. 2. The traction drive transmission of claim 1 , further comprising a second floating roller in contact with the second reaction roller. 3. An electric powertrain, comprising: a motor-generator; a first traction drive transmission having a first ring member, a first non-rotatable traction planet carrier configured to support a plurality of traction rollers, and a first sun member coupled to the motor-generator; a second traction drive transmission having a second ring member, a second non-rotatable traction planet carrier, and a second sun member coupled to the first ring member; a first pinion gear having a hollow central bore, the first pinion gear coupled to the second ring member; and a shaft coupled to the second sun member and the first ring member, the shaft passing through the hollow central bore. 4. The electric powertrain of claim 3 , further comprising a second pinion gear coupled to the first pinion gear, the second pinion gear configured to transmit rotational power. 5. The electric powertrain of claim 3 , wherein the plurality of traction rollers are conical in shape. 6. The electric powertrain of claim 3 , wherein the first pinion gear is positioned between the motor-generator and the second traction drive transmission. 7. The electric powertrain of claim 3 , wherein the first pinion gear is positioned between the first traction drive transmission and the second traction drive transmission. 8. A traction drive transmission, comprising: a ring member having a rotational center aligned along a main axis of the transmission; a first traction roller in contact with the ring member; a sun member having a rotational center offset from the main axis, the sun member in contact with the first traction roller, the sun member located radially inward of the first traction roller; a first floating traction roller in contact with the ring member and the sun member; a first reaction roller in contact with the first floating traction roller; and a carrier configured to support the reaction roller, the carrier configured to be non-rotatable; wherein the carrier is configured to support the first traction roller. 9. The traction drive transmission of claim 8 , further comprising a second reaction roller supported in the carrier. 10. The traction drive transmission of claim 9 , further comprising a second floating roller in contact with the second reaction roller.
Assignees
Inventors
Classifications
with members having orbital motion · CPC title
Hybrid vehicles · CPC title
comprising more than one electric motor · CPC title
- B60K1/00Primary
Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) · CPC title
one motor mounted on a propulsion axle for rotating right and left wheels of this axle · CPC title
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Frequently asked questions
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- What does patent US11306802B2 cover?
- A traction device including a ring member, a carrier, and a sun member and an electric motor, wherein the electric motor is coupled to at least one of the ring member, the carrier, and the sun member.
- Who is the assignee on this patent?
- Dana Ltd
- What technology area does this patent fall under?
- Primary CPC classification B60K1/00. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 19 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).