HIGH SENSITIVITY TYPE IMPELLER OF WATER METER

摘要

The present invention is composed of a rotating shaft which is rotated inside the water meter and the rotational force is transmitted to the measuring instrument through a gear, etc. and a rotary wing that is rotated by the water flowing into and coupled to the rotating shaft, the water meter of the water meter to measure the flow rate of the tap water In the rotation shaft is a lower boss portion and the annular stepped portion and the lower boss portion which is provided with a tooth shaft protruding shaft in the upper surface portion and an annular stepped portion formed in the lower portion of the tooth and a bushing with a pivot shaft insertion groove formed in the bottom center The outer diameter is reduced and the reduced diameter extension portion is formed integrally formed so that the center is located in a straight line between the annular stepped portion and the lower boss portion, the rotary blade is a plurality of radially formed wings and the reduced diameter extension portion of the rotary shaft And a boss part coupled to the outer periphery of the lower boss part, wherein the boss part has the reduced diameter. Molded on the outer periphery of the extension part and the lower boss part, the concentricity of the rotating shaft and the rotating blade is exactly the same, so that even if the amount of tap water flowing into the water meter is extremely small, the flow rate can be measured sensitively, and the reduced diameter extension part of the rotating shaft Since the rotor blade is molded in a state where the uneven portion is formed on the outer circumference thereof, the rotor shaft and the rotor blade are tightly coupled, so that there is an advantage of maintaining the concentricity accurately even when used for a long time.