Fan blade regulation device and counter-rotating axial-flow fan

摘要

#$%^&*AU2017352546B220190704.pdf#####ABSTRACT Embodiments provide a fan blade regulation device and a counter-rotating 5 axial-flow fan. The fan blade regulation device includes: a driving rod, wherein the driving rod includes a driving end positioned outside a fan housing and a connecting end connected with a transmission member; a first transmission member which is rotatable along with rotation of the driving rod is connected to the connecting end of the driving rod; a second transmission member which is axially movable along a fan 10 shaft along with rotation of the first transmission member is connected to the first transmission member; and the second transmission member is connected to a blade regulation plate which is axially moveable along with axial movement of the second transmission member, an outer circumference of the blade regulation plate is connected with each blade rotating arm, one end of each blade rotating arm is 15 connected with the blade regulation plate, and another end is connected with each fan blade. 29