Displacement adjusting device of swash plate pump
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United States of America Patent
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Aug 20, 2020
Grant Date -
Aug 20, 2020
app pub date -
Nov 8, 2016
filing date -
Dec 25, 2015
priority date (Note) -
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Abstract
A displacement adjusting device of a swash plate pump includes: a tilting piston slidably inserted in a housing's accommodating hole, the tilting piston pressing the swash plate pump's swash plate; a sleeve forming a control pressure chamber between the sleeve and tilting piston, the sleeve including a pump port, tank port, and output port; a spool slidably held by the sleeve, the spool switching whether to bring output port into communication with one of the pump port and tank port or block the output port from the pump and tank port; a tilting spring urging the tilting piston and spool away from each other; and a solenoid including a rod that presses the spool from an opposite side to tilting spring. In the sleeve, reaction force chamber and communication passage are formed. The communication passage being a passage through which the control pressure chamber communicates with reaction force chamber.
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