US 12,128,761 B2
Work vehicle and power take-off apparatus for the same
Hidetoshi Hana, Osaka (JP); Tomoya Uno, Osaka (JP); Katsuhiko Honda, Osaka (JP); Yusuke Shimogami, Osaka (JP); and Yutaka Inubushi, Osaka (JP)
Assigned to KUBOTA CORPORATION, Osaka (JP)
Filed by KUBOTA CORPORATION, Osaka (JP)
Filed on Apr. 21, 2023, as Appl. No. 18/137,676.
Application 18/137,676 is a division of application No. 17/062,979, filed on Oct. 5, 2020, granted, now 11,679,672.
Claims priority of application No. 2019-227656 (JP), filed on Dec. 17, 2019; application No. 2019-227657 (JP), filed on Dec. 17, 2019; and application No. 2019-227658 (JP), filed on Dec. 17, 2019.
Prior Publication US 2023/0249545 A1, Aug. 10, 2023
Int. Cl. B60K 17/28 (2006.01); B60K 17/04 (2006.01); F16H 3/093 (2006.01); F16H 37/04 (2006.01); B60T 1/06 (2006.01); B62D 49/06 (2006.01)
CPC B60K 17/28 (2013.01) [B60K 17/046 (2013.01); F16H 3/093 (2013.01); F16H 37/041 (2013.01); B60T 1/065 (2013.01); B62D 49/06 (2013.01); F16H 2200/0004 (2013.01); F16H 2200/0043 (2013.01); F16H 2702/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A power take-off apparatus for a work vehicle, comprising:
an input shaft;
an output shaft to which power of the input shaft is transmitted;
a power take-off shaft coupled in an interlocked manner to the output shaft, and configured to take off the power of the output shaft and output resultant power to an apparatus to be driven; and
a gear shift mechanism configured to shift the power of the input shaft to power having four different rotation speeds and transmit resultant power to the output shaft,
wherein the gear shift mechanism includes:
a first gear train having a first input shaft gear relatively rotatably supported by the input shaft and a first output shaft gear relatively rotatably supported by the output shaft, and configured to transmit the power of the input shaft to the output shaft at a first speed/transmission ratio, in response to the first input shaft gear being coupled in an interlocked manner to the input shaft and the first output shaft gear being coupled in an interlocked manner to the output shaft;
a second gear train having a second input shaft gear relatively rotatably supported by the input shaft and a second output shaft gear relatively rotatably supported by the output shaft, and configured to transmit the power of the input shaft to the output shaft at a second speed/transmission ratio different from the first speed/transmission ratio, in response to the second input shaft gear being coupled in an interlocked manner to the input shaft and the second output shaft gear being coupled in an interlocked manner to the output shaft; and
a relay transmission shaft coupled in an interlocked manner to the first output shaft gear via a first relay transmission gear mechanism having a first relay speed/transmission ratio, and coupled in an interlocked manner to the second output shaft gear via a second relay transmission gear mechanism having a second relay speed/transmission ratio different from the first relay speed/transmission ratio, and
wherein the power take-off apparatus further comprises:
a first operation part configured to alternatively couple the first input shaft gear and the second input shaft gear to the input shaft in an interlocked manner; and
a second operation part configured to alternatively couple the first output shaft gear and the second output shaft gear to the output shaft in an interlocked manner.