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Title:
HYDRAULIC CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
Japanese Patent JP2012189149
Kind Code:
A
Abstract:

To prevent cavitation or transmission efficiency degradation caused by failure in the recovery of hydraulic pressure in a closed circuit due to an excessive discharge of oil through a relief valve during working, in a hydraulic continuously variable transmission to be applied to a working vehicle or the like.

The hydraulic continuously variable transmission has an input shaft 2, a cylinder block 3 securely installed on the input shaft, a pump swash plate 4 disposed in one side of the cylinder block, a motor swash plate disposed in the other side of the cylinder block, and an output member 5 integrally rotatable with the motor swash plate. The cylinder block includes a pump plunger 31, a motor plunger 32, and an oil passage that connects the pump plunger to the motor plunger. A charge check relief valve assembly 10, including a relief valve 11 for discharging oil from the oil passage and a first charge check valve 12 for supplying oil to the oil passage, is connected to the oil passage. In the hydraulic continuously variable transmission, a second charge check valve 13 is externally attached to the charge check relief valve assembly.


Inventors:
IWAIHARA RYUTA
TSUJI TOMOYUKI
Application Number:
JP2011000053364
Publication Date:
October 04, 2012
Filing Date:
March 10, 2011
Export Citation:
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Assignee:
KANZAKI KOKYUKOKI MFG CO LTD
International Classes:
F16H39/04
Domestic Patent References:
JPH0333264U1991-04-02
JPH0183958U1989-06-05
JP2008128469A2008-06-05
JPS5089759A1975-07-18
JP2008045723A2008-02-28
JPH10169774A1998-06-26
JPH0542807U1993-06-11
JP2007333010A2007-12-27
JPS6325869U1988-02-20
Attorney, Agent or Firm:
矢野 寿一郎



 
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