Patent US4559849A successfully refreshed from Google Patents.
US4559849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power shift planetary gear transmission
Assignee: SRM Hydromekanik AB
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Filing: 1981-06-23
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Granted: 1985-12-24
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Expires: 2001-06-23
Abstract
Abstract A planetary gear transmission having at least two different gearing diameters, the pinions of which are journalled independently of each other so that they can have a large gear ratio step between them; and a multi-speed transmission including first and second planetary gear sets, the second of which sets is the planetary gear transmission having the two different gearing diameters journalled independently of each other. In the multi-speed transmission, the gear ratio steps of the second planetary gear set each exceed the highest gear ratio of the first planetary gear set.
Inventors
- 👤 Karl-Gustav Ahlen
- 👤 Per-Olof Bergstrom
- 👤 Hans A. Wallgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:38
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/663; F16H2200/00; F16H2200/003
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
361 words
A multi-speed transmission, comprising: a casing; first and second series connected planetary gear sets, an output shaft of the first set operatively connected to an input shaft of the second set; each planetary gear set comprising a planetary pinion carrier which comprises an output member of its planetary gear set, a plurality of planetary pinions mounted in each said carrier; each pinion of the first gear set having at least two different gearing diameters having different gear ratios, an input centrally disposed gear meshing with one of the gearing diameters and at least two other centrally disposed gears meshing one with each of the gearing diameters, a brake means for braking each of said other centrally disposed gears relative to the casing; the second planetary gear set having at least first and second gearing diameters mounted on a carrier and differing from each other, a separate input sun gear for each of said first and second gearing diameters, at least two ring gears meshing one with each of the first and second gearing diameters, a brake means for braking each of said ring gears relative to the casing, the input shaft of the second planetary gear set being connected to each of said input sun gears, the first and second gearing diameters being journalled on the carrier independently of each other on first and second journal bearings, respectively, which first and second journal bearings are independent of each other and spaced from each other; the gear ratio of the said first gearing diameter being greater than the largest gear ratio of the first planetary gear set, and the gear ratio of the said second gearing diameter exceeding the gear ratio of the said first gearing diameter by an amount which also exceeds the largest gear ratio of the first planetary gear set, and wherein the carrier of the second planetary gear set forms a hub portion coaxial with each planetary pinion, a journal bearing for the large gearing diameter being mounted on said hub portion, and said hub portion including a central axial opening, at least a portion of the journal bearings for the smaller gearing diameter located in said opening.
Claim 2
Dependent Claim
361 words
A multi-speed transmission, comprising: a casing; first and second series connected planetary gear sets, an output shaft of the first set operatively connected to an input shaft of the second set; each planetary gear set comprising a planetary pinion carrier which comprises an output member of its planetary gear set, a plurality of planetary pinions mounted in each said carrier; each pinion of the first gear set having at least two different gearing diameters having different gear ratios, an input centrally disposed gear meshing with one of the gearing diameters and at least two other centrally disposed gears meshing one with each of the gearing diameters, a brake means for braking each of said other centrally disposed gears relative to the casing; the second planetary gear set having at least first and second gearing diameters mounted on a carrier and differing from each other, a separate input sun gear for each of said first and second gearing diameters, at least two ring gears meshing one with each of the first and second gearing diameters, a brake means for braking each of said ring gears relative to the casing, the input shaft of the second planetary gear set being connected to each of said input sun gears, the first and second gearing diameters being journalled on the carrier independently of each other on first and second journal bearings, respectively, which first and second journal bearings are independent of each other and spaced from each other; the gear ratio of the said first gearing diameter being greater than the largest gear ratio of the first planetary gear set, and the gear ratio of the said second gearing diameter exceeding the gear ratio of the said first gearing diameter by an amount which also exceeds the largest gear ratio of the first planetary gear set, and wherein the carrier of the second planetary gear set forms a hub portion coaxial with each planetary pinion, a journal bearing for the large gearing diameter being mounted on said hub portion, and said hub portion including a central axial opening, at least a portion of the journal bearings for the smaller gearing diameter located in said opening.
Claim 3
Dependent Claim
66 words
A multi-speed transmission according to claim 1, wherein the first planetary gear set has at least three different gearing diameters, the input centrally disposed gear thereof being a ring gear meshing with the largest gearing diameter, and the other centrally disposed gears comprising a sun gear meshing one with each of the three gearing diameters, and a said friction brake for each of said sun gears.
Claim 4
Dependent Claim
51 words
A multi-speed transmission according to claim 2, said other centrally disposed gears of the first planetary gear set including a further ring gear meshing with one of the gearing diameters other than the largest gearing diameter to provide a reverse drive, and a said friction brake for said further ring gear.
Claim 5
Dependent Claim
37 words
A multi-speed transmission according to claim 1, said second planetary gear set further including a direct drive clutch for connecting the input shaft of the second planetary gear set with the carrier thereof for direct drive therethrough.
Claim 6
Dependent Claim
41 words
A multi-speed transmission according to any one of claims 1, 2, 3 or 4 including a direct drive clutch means in said first planetary gear set for connecting the input shaft thereof to the said carrier thereof for direct drive therethrough.
Claim 7
Dependent Claim
49 words
A multi-speed transmission according to claim 1, wherein the said smaller gearing diameter of the second planetary gear set has two gear surfaces of different diameters, its said sun input gear meshing with the smaller gear surface, and wherein its respective ring gear, meshes with the other gear surface.
Claim 8
Dependent Claim
50 words
A multi-speed transmission according to claim 1, wherein the said larger gearing diameter of the second planetary gear set has two gear surfaces of different diameters, said sun input gear thereof meshing with the larger gear surface thereof, and wherein its respective ring gear, meshes with the other gear surface.
Claim 9
Dependent Claim
69 words
A multi-speed transmission according to claim 1, wherein each of the smaller and larger gearing diameters have two gear surfaces of different diameters, the sun input gear for the smaller gearing diameter meshing with the smaller gear surface, the sun input gear for the larger gearing diameter meshing with the larger gear surface, and the ring gears associated with each gearing diameter meshing with the other gear surface thereof.
Claim 10
Dependent Claim
35 words
A multi-speed transmisison according to claim 1, the journal bearing for the large gearing diameter mounted generally in the same radial plane with the said portion of the journal bearing for the smaller gearing diameter.
Claim 11
Dependent Claim
22 words
A multi-speed transmission according to claim 1, wherein the large and small gearing diameters of the second planetary gear set are coaxial.
Claim 12
Dependent Claim
244 words
A planetary gear transmission comprising: a casing, an input shaft rotatably mounted in the casing, a carrier rotatably mounted in the casing and comprising an output member of the planetary gear transmission, a plurality of planetary pinions mounted in the said carrier and spaced about the axis of the planetary gear transmission, each said planetary pinion comprising at least two different gearing diameters, a first sun gear connected to the input shaft and meshing with the smaller gearing diameter, a second sun gear connected to the input shaft and meshing with the larger gearing diameter, at least two ring gears meshing one with each of the first and second gearing diameters, a brake means for braking each of said ring gears relative to the casing, and each of the two gearing diameters being journalled on the carrier independently of each other on first and second journal bearings, respectively, the first and second journal bearings being independent of each other, a direct drive clutch means for connecting the input shaft and the carrier for direct drive, said clutch means including an element directly connecting the said input shaft to the said direct drive clutch, said carrier forming a hub portion coaxial with each planetary pinion, a journal bearing for said larger gearing diameter being mounted on said hub portion and said hub portion including a central axial opening, at least a portion of the journal bearing for the smaller gearing diameter located in said opening.
Claim 13
Dependent Claim
244 words
A planetary gear transmission comprising: a casing, an input shaft rotatably mounted in the casing, a carrier rotatably mounted in the casing and comprising an output member of the planetary gear transmission, a plurality of planetary pinions mounted in the said carrier and spaced about the axis of the planetary gear transmission, each said planetary pinion comprising at least two different gearing diameters, a first sun gear connected to the input shaft and meshing with the smaller gearing diameter, a second sun gear connected to the input shaft and meshing with the larger gearing diameter, at least two ring gears meshing one with each of the first and second gearing diameters, a brake means for braking each of said ring gears relative to the casing, and each of the two gearing diameters being journalled on the carrier independently of each other on first and second journal bearings, respectively, the first and second journal bearings being independent of each other, a direct drive clutch means for connecting the input shaft and the carrier for direct drive, said clutch means including an element directly connecting the said input shaft to the said direct drive clutch, said carrier forming a hub portion coaxial with each planetary pinion, a journal bearing for said larger gearing diameter being mounted on said hub portion and said hub portion including a central axial opening, at least a portion of the journal bearing for the smaller gearing diameter located in said opening.
Claim 14
Dependent Claim
44 words
A planetary gear transmission according to claim 11, the smaller gearing diameter having two gear surfaces of different diameters, and its said sun input gear meshing with the smaller gearing diameter, and wherein its respective ring gear, meshes with the other gear surface thereof.
Claim 15
Dependent Claim
45 words
A planetary gear transmission according to claim 11, wherein the said larger gearing diameter has two gear surfaces of different diameters, said sun input gear thereof meshing with the larger gear surface thereof, and wherein its respective ring gear, meshes with the other gear surface.
Claim 16
Dependent Claim
70 words
A planetary gear transmission according to claim 11, wherein each of the smaller and larger gearing diameters have two gear surfaces of different diameters, the sun input gear for the smaller gearing diameter meshing with the smaller gear surface, the sun input gear for the larger gearing diameter meshing with the larger gear surface, and the ring gears associated with each gearing diameter meshing with the other gear surface thereof.
Claim 17
Dependent Claim
36 words
A planetary gear transmission according to claim 11, the journal bearing for the large gearing diameter mounted generally in the same radial plane with the said portion of the journal bearing for the smaller gearing diameter.
Claim 18
Dependent Claim
15 words
A planetary gear transmission according to claim 11, wherein the different gearing diameters are coaxial.
References Cited (Backward Citations)
GB1050283A
Cited
GB743814A
Cited
US3021729A
Cited
FR1231312A
Cited
GB975809A
Cited
GB1008307A
Cited
GB1421650A
Cited
GB1525593A
Cited
US4142425A
Cited
US4214489A
Cited
US4077281A
Cited
US4077280A
Cited
DE2733558A1
Cited
US4328716A
Cited
GB2010992A
Cited
US4314487A
Cited
US4391163A
Cited
US4453430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |