SPEED-CHANGING DEVICE

WIPO Patent Application WO/2004/104449

A1

A speed-changing device is capable of enhancing energy efficiency in all speed ranges from a low-speed to a high-speed range, and the device has no torque interruption so that operability is improved. The speed-changing device 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) is connected to a first element (planetary carrier (12)) of the planetary gear mechanism (9), the second pump/motor (15) is connected to a second element (sun gear (19)) of the planetary gear mechanism (9), the intermediate output shaft (8)is connected to a third element (ring gear (16)) of the planetary gear mechanism (9), and a switching mechanism (syncromesh mechanism (6)) selectively connecting the first pump/motor (7) to either the input shaft (3) or the intermediate output shaft (8).

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HIRAKI HIKOSABURO (JP)
KUSE TAKASHI (JP)
OKADA TOSHIKAZU (JP)
YAMAMOTO SHIGERU (JP)
ISHIZAKI NAOKI (JP)

PCT/JP2004/006400

December 02, 2004

April 30, 2004

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KOMATSU MFG CO LTD (JP)
HIRAKI HIKOSABURO (JP)
KUSE TAKASHI (JP)
OKADA TOSHIKAZU (JP)
YAMAMOTO SHIGERU (JP)
ISHIZAKI NAOKI (JP)

B60K6/365; B60K6/485; B60W10/10; B60W20/00; F16H47/04; F16H61/00; (IPC1-7): F16H47/04

DE2141098A1	1973-02-22
JPH1151149A	1999-02-23
DE3438561A1	1986-04-30
JP2001336602A	2001-12-07
JPH10159939A	1998-06-16
JP2001208004A	2001-08-03

Inoue, Tsutomu (2-12 Itachibori 1-chome, Nishi-k, Osaka-shi Osaka, JP)

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