Multiple speed transmission utilizing co-planar gear sets
First Claim
Patent Images
1. A multiple speed power transmission, comprising:
- an input shaft (30, 90);
a transmission case (34, 94);
a first co-planar gear set (36, 96) comprising a first sun (38, 98), a first ring (40, 100), a first carrier (42, 102), and a first eccentric gear (44, 104) supported by the first carrier and meshing with both the first sun and the first ring;
a rear epicyclic gearing assembly (50, 110) comprising first (60, 112), second (54 and 62, 118 and 124), third (56, 116 and 126), and fourth (52, 122) rotating members such that the speeds of the second and third rotating members are a weighted average of the speeds of the first and fourth rotating members; and
an output shaft (32, 92) connected to the second rotating member (54 and 62, 118 and 124).
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Abstract
A multiple speed power transmission, comprising an input shaft; a transmission case; a co-planar gear set; a rear epicyclic gearing assembly with four rotating members; a first clutch connecting the output of the co-planar gear set to the fourth rotating member; a second clutch connecting the output of the co-planar gear set to the first rotating member; a third clutch connecting the input shaft to the third rotating member; a first brake holding the fourth rotating member against rotation; a second brake holding the third rotating member against rotation; and an output shaft connected to the second rotating member.
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Citations
21 Claims
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1. A multiple speed power transmission, comprising:
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an input shaft (30, 90); a transmission case (34, 94); a first co-planar gear set (36, 96) comprising a first sun (38, 98), a first ring (40, 100), a first carrier (42, 102), and a first eccentric gear (44, 104) supported by the first carrier and meshing with both the first sun and the first ring; a rear epicyclic gearing assembly (50, 110) comprising first (60, 112), second (54 and 62, 118 and 124), third (56, 116 and 126), and fourth (52, 122) rotating members such that the speeds of the second and third rotating members are a weighted average of the speeds of the first and fourth rotating members; and an output shaft (32, 92) connected to the second rotating member (54 and 62, 118 and 124). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A multiple speed power transmission, comprising:
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an input shaft (30); a transmission case (34); a first co-planar gear set (36) comprising a first sun (38), a first ring (40), a first carrier (42) driveably connected to the input shaft (30), and a first eccentric gear (44) supported by the first carrier and meshing with both the first sun and the first ring; a means of holding the first sun (38) against rotation; a rear epicyclic gearing assembly (50) comprising first (60), second (54 and 62), third (56), and fourth (52) rotating members such that the speeds of the second and third rotating members are a weighted average of the speeds of the first and fourth rotating members; a first clutch (72) releasably connecting the first ring (40) to the fourth rotating member (52); a second clutch (74) releasably connecting the first ring (40) to the first rotating member (60); a third clutch (76) releasably connecting the input shaft (30) to the third rotating member (56); a first brake (78) releasably holding the fourth rotating member (52) against rotation; a second brake (80) releasably holding the third rotating member (56) against rotation; and an output shaft (32) connected to the second rotating member (54 and 62). - View Dependent Claims (11, 12, 13, 14)
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15. An epicyclic gearing assembly, comprising:
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a simple planetary gear set comprising a first sun (52), a first ring (54), a first carrier (56), and a set of planet gears (58) supported by the first carrier and meshing with both the first sun and the first ring; and a first co-planar gear set comprising a second sun (60), a second ring (62) driveably connected to the first ring, the first carrier (56), and a first eccentric gear (64) supported by the first carrier and meshing with both the second sun and the second ring.
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16. A multiple speed power transmission comprising:
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an input shaft (30); an output shaft (32); and gearing, brakes, and clutches arranged to produce multiple speed ratios between the input shaft and output shaft, the gearing including; a simple planetary gear set comprising a first sun (52), a first ring (54), a first carrier (56), and a set of planet gears (58) supported by the first carrier and meshing with both the first sun and the first ring; and a first co-planar gear set comprising a second sun (60), a second ring (62) driveably connected to the first ring and the output shaft, the first carrier (56), and a first eccentric gear (64) supported by the first carrier and meshing with both the second sun and the second ring. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification