Nsk Corporation

Yukiyoshi Okazaki

Taikou Nawamoto

Kenichi Sugiyama

Satoshi Dairokuno

A rod body () is formed of magnetostrictive material and includes one end portion () fixed, and a piston () is fixed to the other end portion () of the rod body (). The piston () is slidably disposed within a cylinder () in which there is formed a pump chamber (). A suction port () for sucking lubricating oil into the pump chamber () is formed in the cylinder (), while a suction valve () for preventing the lubricating oil from flowing out from the suction port () is disposed in the suction port (). In the cylinder (), there is disposed a nozzle () which communicates with the pump chamber () and has a sectional area smaller than the lubricating oil passage sectional area of the suction valve (). There is disposed a coil () outside the rod body () and, to the coil (), there is connected a control device () for controlling the supply of a current to be supplied to the coil ().

Lubricating device

A rod body ( ) is formed of magnetostrictive material and includes one end portion ( ) fixed, and a piston ( ) is fixed to the other end portion ( ) of the rod body ( ). The piston ( ) is slidably disposed within a cylinder ( ) in which there is formed a pump chamber ( ). A suction port ( ) for sucking lubricating oil into the pump chamber ( ) is formed in the cylinder ( ), while a suction valve ( ) for preventing the lubricating oil from flowing out from the suction port ( ) is disposed in the suction port ( ). In the cylinder ( ), there is disposed a nozzle ( ) which communicates with the pump chamber ( ) and has a sectional area smaller than the lubricating oil passage sectional area of the suction valve ( ). There is disposed a coil ( ) outside the rod body ( ) and, to the coil ( ), there is connected a control device ( ) for controlling the supply of a current to be supplied to the coil ( ).

Spindle apparatus

A rod body is formed of magnetostrictive material and includes one end portion fixed, and a piston is fixed to the other end portion of the rod body . The piston is slidably disposed within a cylinder in which there is formed a pump chamber . A suction port for sucking lubricating oil into the pump chamber is formed in the cylinder , while a suction valve for preventing the lubricating oil from flowing out from the suction port is disposed in the suction port . In the cylinder , there is disposed a nozzle which communicates with the pump chamber and has a sectional area smaller than the lubricating oil passage sectional area of the suction valve . There is disposed a coil outside the rod body and, to the coil , there is connected a control device for controlling the supply of a current to be supplied to the coil

Growing community of inventors

Kanagawa, Japan

Yukiyoshi Okazaki