| 摘要 |
PURPOSE: A hydraulic decelerator for an automatic door capable of facilitating redirection of a fluid pressure is provided to improve productivity and operation efficiency as a direction of a fluid pressure can be smoothly converted in a main body. CONSTITUTION: A hydraulic decelerator comprises a main body(110), a spur gear(120), first and second gears, and a rotary body(200). The main body comprises a passage which is mounted on one side of a hanger(20), a passage filled with oil, and a seating groove in which the rotary body is installed. The spur gear goes in with a rack gear installed at a upper part of a doorframe, and is installed so as to rearwardly protrude of the main body. The first gear is installed with the spur gear as one unit and thus receives rotator power. The second gear goes in with the first gear and is installed in the main body. The rotary body comprises an insertion groove where a ball is inserted and that settles rotatably in the seating groove, a discharge hole, a blocking bar that prevents dislocation of the ball, and a packing that prevents release of the oil to the outside. |
