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Title:
増幅されたストローク力を発生可能な連続的に可変の流体静力学的伝動比率コントローラ
Document Type and Number:
Japanese Patent JP4391599
Kind Code:
B2
Abstract:
To control transmission ratio of a continuously variable hydrostatic transmission including an input shaft, an output shaft, a hydraulic pump unit driven by the input shaft, a grounded hydraulic motor unit, and a wedge-shaped swashplate drivingly, pivotally connected to the output shaft and positioned to accommodate pumped hydraulic fluid exchanges between the pump and motor units. A ratio controller is provided having a pair of hydraulically actuated, differentially sized pistons coupled by a linkage mechanism to pivot the swashplate in opposite transmission ratio-changing directions. The smaller piston is incorporated internally of the output shaft, while the larger piston, of an annular shape, coaxially surrounds the output shaft. The linkage mechanism has geometry effective to translate axial forces exerted by the pistons into amplified ratio-changing moments exerted on the swashplate. The ratio controller also includes a control valve selectively positioned to change the hydraulic fluid pressure acting on the larger piston, such as to set a transmission ratio and also to determine the ratio-changing direction of swashplate pivotal motion.

Inventors:
ラーキン、ロバート・フランシス
Application Number:
JP54715298A
Publication Date:
December 24, 2009
Filing Date:
April 24, 1998
Export Citation:
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Assignee:
L‐3 コミュニケーションズ・コーポレーション
International Classes:
F16H39/14; F16H39/10
Domestic Patent References:
JP4064771A
JP49010791B1
JP9511319A
JP6505327A
Foreign References:
WO1996031715A1
Attorney, Agent or Firm:
山崎 行造
杉山 直人
白銀 博
赤松 利昭