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US 2006/0217225 A1Published application
Speed-changing device
AssigneeKomatsu Ltd.
InventorsHikosaburo Hiraki, Takashi Kuse, Toshikazu Okada
Life of this patent
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AssigneeKomatsu Ltd.
InventorsHikosaburo Hiraki, Takashi Kuse, Toshikazu Okada
Estimating the term…
A transmission is provided which has a very compact system configuration and is capable of exerting high energy efficiency over all speed regions from a low speed region to a high speed region, while providing improved operability free from a torque shortage. To this end, the transmission has an input shaft 3, an intermediate output shaft 8, a planetary gear mechanism 9, a first pump-motor 7, and a second pump-motor 15 connected to the first pump-motor 7, the input shaft 3 being coupled to a first element (planetary carrier 12) of the planetary gear mechanism 9, the second pump-motor 15 being coupled to a second element (sun gear 19) of the planetary gear mechanism 9, the intermediate output shaft 8 being coupled to a third element (ring gear 16) of the planetary gear mechanism 9, and the transmission further comprising a switching mechanism (synchromesh mechanism 6) for selectively coupling the first pump-motor 7 to either the input shaft 3 or the intermediate output shaft 8.
A transmission comprising an input shaft, an output shaft, a planetary gear mechanism interposed between the input shaft and the output shaft, a first pump-motor, and a second pump-motor connected to the first pump-motor, the input shaft being coupled to a first element of the planetary gear mechanism, the second pump-motor being coupled to a second element of the planetary gear mechanism, and the output shaft being coupled to a third element of the planetary gear mechanism, the transmission further comprising:
A transmission comprising an input shaft, an output shaft, a planetary gear mechanism interposed between the input shaft and the output shaft, a first generator-motor, and a second generator-motor connected to the first generator-motor, the input shaft being coupled to a first element of the planetary gear mechanism, the second generator-motor being coupled to a second element of the planetary gear mechanism, and the output shaft being coupled to a third element of the planetary gear mechanism, the transmission further comprising:
Dependencies are inferred from the claim text.