Patent ID: 9115712
Filing Date: 2015-08-25
Classification: F04B

Abstract:
1. A swing barrel type positive displacement pump using cross shaft joint bearing comprises a positive displacement pump housing and a main shaft ( 1 ) connected with a motor; an upper part of the main shaft ( 1 ) is slantwise provided with a rotating barrel ( 2 ) which swings along with the rotation of the main shaft ( 1 ); periphery of the rotating barrel ( 2 ) is evenly provided with more than three pin shafts ( 3 ); wherein on each of the pin shafts ( 3 ), there is sleeved with a cross shaft joint bearing ( 4 ), whereas the cross shaft joint bearing ( 4 ) includes a bearing ( 41 ) sleeved on a corresponding pin shaft of the pin shafts ( 3 ), whereas outer ring of the bearing ( 41 ) is fixedly connected with a swing sleeve ( 42 ); whereas fixed shafts ( 421 , 421 ′) having a same axis and forming a cross with the corresponding pin shaft extend respectively from left and right sides of the swing sleeve ( 42 ); whereas the fixed shafts ( 421 , 421 ′) are sleeved with a left bearing ( 43 ) and a right bearing ( 43 ′) respectively; whereas outer rings of the left bearing ( 43 ) and the right bearing ( 43 ′) are fixedly connected with a left cross shaft swing sleeve ( 44 ) and a right cross shaft swing sleeve ( 44 ′) respectively; whereas top ends of the left cross shaft swing sleeve ( 44 ) and the right cross shaft swing sleeve ( 44 ′) are fixedly connected with each other; whereas bottom ends of the left cross shaft swing sleeve ( 44 ) and the right cross shaft swing sleeve ( 44 ′) are fixedly connected with a connecting bar ( 5 ) which is hinged with a piston in a displacement chamber.