COOLANT NOZZLE HAVING FUNCTION OF AUTOMATICALLY ELIMINATING CLOGGING BY FOREIGN MATTER

摘要

A nozzle through which a liquid coolant is discharged is provided with an outer tube, a projecting member and an inner tube disposed inside the outer tube, and an elastic body disposed between the inner tube and a discharge port of the outer tube. If foreign matter accumulates on a nozzle opening of the inner tube, the elastic body is compressed by the inner tube under the pressure of the coolant, so that the inner tube moves toward the discharge port. Consequently, the projecting member penetrates the nozzle opening, thereby automatically removing the foreign matter accumulated on the nozzle opening.

主权项

1. A coolant nozzle through which a liquid coolant is discharged, the coolant nozzle comprising:
an outer tube with a discharge port at the lower end thereof; a projecting member disposed inside the outer tube and set up upstream with respect to the coolant from the discharge port of the outer tube; an inner tube disposed inside the outer tube and comprising a nozzle opening in a position for insertion of the projecting member; and an elastic body disposed between the inner tube and the discharge port of the outer tube, wherein the elastic body is compressed so that the inner tube moves toward the discharge port by a distance corresponding to the compression when the inner tube is pushed by the coolant, whereby a distal end portion of the projecting member projects out of the inner tube through the nozzle opening.