Cooling medium spray device

A cooling medium spray device configured to pressurize a cooling medium supplied via a main shaft of a machine tool and to spray the pressurized cooling medium, comprising:

• a body part having a body part passage that extends in an axial direction, the body part being configured such that the cooling medium supplied from the main shaft will flow through the body part passage while the body part is coupled to the main shaft of the machine tool;
• a support part having an interior space, a first passage and a second passage, the body part being rotatably disposed in the interior space of the support part, the support part being configured to be fixed to the machine tool while the body part is coupled to the main shaft of the machine tool so that the support part is not rotatable relative to the machine tool;
• a pump having a rotating part, an inlet port and an outlet port, the rotating part being rotatably disposed within the interior space of the support part and being rigidly connected to the body part to rotate therewith, and the pump being configured such that rotation of the rotating part relative to the support part causes the pressure of the cooling medium that is being suctioned via the inlet port to be increased and the pressurized cooling medium is caused to be discharged from the outlet port;
• a cap having a cap passage that fluidly communicates with a nozzle hole of the cap, the cap being fixedly mounted on the support part on a side of the pump that is opposite of the body part, the cap closing up the interior space of the support part;
• and
• a nozzle fixedly mounted in the nozzle hole and having a nozzle passage that fluidly communicates with a spray port of the nozzle and with the cap passage,
• wherein the body part passage of the body part fluidly communicates with the inlet port of the pump via the first passage of the support part, and the outlet port of the pump fluidly communicates with the cap passage of the cap via the second passage of the support part.

A coolant spraying device, comprising:

• a body part having a body part passage that extends in an axial direction, the body part being configured such that cooling medium supplied from a main shaft of a machine tool will flow through the body part passage while the body part is fixedly coupled to the main shaft of the machine tool;
• a support part having an interior space, a first conduit and a second conduit, the body part being rotatably disposed in the interior space of the support part, the support part being configured to be fixed to the machine tool while the body part is fixedly coupled to the main shaft of the machine tool so as to be non-rotatable relative to the machine tool;
• a pump having a rotating part, an inlet port and an outlet port, the rotating part being rotatably disposed within the interior space of the support part and being connected to the body part to rotate therewith, and the pump being configured such that rotation of the rotating part increases the pressure of the cooling medium that is being suctioned via the inlet port and causes the pressurized cooling medium to be discharged from the outlet port;
• a cap having a cap passage that is in fluid communication with a nozzle hole of the cap, the cap being fixedly mounted on the support part on a side of the pump that is opposite of the body part, the cap closing up the interior space of the support part;
• and
• a nozzle fixedly mounted in the nozzle hole and having a nozzle conduit that is in fluid communication with a spray port of the nozzle and with the cap passage,
• wherein the body part passage of the body part is in fluid communication with the inlet port of the pump via the first conduit of the support part, and the outlet port of the pump is in fluid communication with the cap passage via the second conduit of the support part.