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Title:
HYDROSTATIC CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
Japanese Patent JP2007092806
Kind Code:
A
Abstract:

To provide a hydrostatic continuously variable transmission stabilized in control of a movable swash plate by a hydraulic servo mechanism and capable of excellently controlling a load with a load control mechanism, in regard to structure provided with a variable capacity type hydraulic pump and a hydraulic motor and for controlling a load by using pressure oil of a main oil passage connecting the hydraulic pump to the hydraulic motor.

A constant flow rate valve 55 for limiting flow rate of the oil to be led into a swash plate angle control valve 23, which is formed in each of hydraulic servo mechanisms 2 and 102, is provided in oil passages 19 and 19 for leading charge pressure oil from a charge oil passage 16 to each of the hydraulic pump 10 side hydraulic servo mechanism 2 and the hydraulic motor 11 side hydraulic servo mechanism 102 at a position, where flow rate of the charge pressure oil supplied to the load control mechanisms 4 and 104 is not limited.


Inventors:
SAKATA KOJI
MOCHIZUKI YASUHISA
Application Number:
JP2005000280568
Publication Date:
April 12, 2007
Filing Date:
September 27, 2005
Export Citation:
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Assignee:
YANMAR CO LTD
International Classes:
F16H61/42; B60K17/10; F16H39/14; F16H61/421; F16H61/423; F16H61/431; F16H61/433
Domestic Patent References:
JPS54101503A1979-08-10
JPH0348065A1991-03-01
JPS4013806B1
JP2002364746A2002-12-18
JPS494103B11974-01-30
Attorney, Agent or Firm:
矢野 寿一郎