Title:
【発明の名称】静油圧式無段変速機
Document Type and Number:
Japanese Patent JP2920772
Kind Code:
B2
Abstract:
PURPOSE:To increase the capacity of a hydraulic motor by forming the respective cylinder holes of a motor cylinder larger in diameter than those of a pump cylinder as well as forming the cylinder hole group of the motor cylinder larger in pitch circle diameter than that of the pump cylinder. CONSTITUTION:The cylinder hole 18 of a motor cylinder 17 is formed to be larger than the cylinder hole 8 of a pump cylinder 7 so as to increase the capacity of a hydraulic motor M. In this case, as the hole 18 group of the cylinder 17 is formed larger in pitch circle diameter than the hole 8 group of the cylinder 7, respective partition walls between cylinder holes 8 and between cylinder holes 18 in both cylinders 7, 17 are provided with appropriate thickness. In addition, each motor port (b) is displaced more onto the center side of a cylinder block 13 than the center of the corresponding hole 18, and the pitch circle diameter of the port (b) group is made approximately equal to that of the pump port (a) group, so that an inner and an outer oil passages 52, 53 are brought close to the center side of a block B, thus restraining the diameter enlargement of the block B and eccentric wheels 63, 64 to a minimum.
Inventors:
NAKAJIMA YOSHIHIRO
HAYASHI TSUTOMU
SAITO MITSURU
HAYASHI TSUTOMU
SAITO MITSURU
Application Number:
JP22567989A
Publication Date:
July 19, 1999
Filing Date:
August 31, 1989
Export Citation:
Assignee:
HONDA GIKEN KOGYO KK
International Classes:
F04B1/20; F16H39/14; (IPC1-7): F16H39/14
Domestic Patent References:
| JP6479469A | ||||
| JP63203960A | ||||
| JP1171636A | ||||
| JP5168856U |
Attorney, Agent or Firm:
Ken Ochiai (1 person outside)