Title:
Work vehicle
Document Type and Number:
Japanese Patent JP6346065
Kind Code:
B2
Abstract:
In a work vehicle such as a tractor, a higher output of a transmission case including a hydraulic mechanical transmission is achieved with a high efficiency, light weight, and low cost of the hydraulic mechanical transmission guaranteed. A transmission case 17 includes: a main transmission input shaft 511 to which the driving force is transmitted from the engine 5; and a main transmission output shaft 512 fit on the main transmission input shaft 511 in a relatively rotatable manner. The main transmission input shaft 511 is provided with a hydraulic pump unit 521, a cylinder block 800, and a fixed capacity hydraulic motor unit 522, forming a hydraulic mechanical transmission 500, arranged in series. Shifted driving force is transmitted to the main transmission output shaft 512 via the fixed capacity hydraulic motor unit 522. The transmission case 17 includes: a planetary gear mechanism 526 in which the driving force from the engine 5 and the shifted driving force to the main transmission output shaft 512 are combined; and a transmission shaft 535 with which the shifted driving force via the main transmission output shaft 512 and the combined driving force via the planetary gear mechanism 526 can be transmitted.
Inventors:
Yusuke Hashimoto
Application Number:
JP2014215742A
Publication Date:
June 20, 2018
Filing Date:
October 22, 2014
Export Citation:
Assignee:
Yanmar Co., Ltd.
International Classes:
F16H47/04; F16H3/54
Domestic Patent References:
| JP2010265939A | ||||
| JP54045452A | ||||
| JP2005172018A | ||||
| JP2009008190A |
Attorney, Agent or Firm:
Ryuichi Watanabe