公开(公告)号：US20220160195A1

公开(公告)日：2022-05-26

申请号：US17408743

申请日：2021-08-23

Applicant: MAKITA CORPORATION

Inventor： Junichi IWAKAMI ,  Yuta KAWAI

IPC: A47L9/00 ,  A47L5/24 ,  A47L9/02 ,  F04D29/66

Abstract: A cleaner reduces noise. The cleaner includes a motor, a fan including a number Z of blades and rotatable at a rotational speed N, indicating revolutions per minute, about a rotation axis by the motor, a cover having an inlet located frontward from the fan, and a number V of ribs located in the inlet. The ribs extend in a radial direction from the rotation axis and are arranged in a circumferential direction about the rotation axis. The fan is rotatable to produce noise having a frequency fNZ of 20,000 Hz or higher, and fNZ=(m−k×V)×N/60 and m=n×Z+k×V, where n is an order, m is an integer, and k is an integer.

公开(公告)号：US20170021466A1

公开(公告)日：2017-01-26

申请号：US15141143

申请日：2016-04-28

Applicant: MAKITA CORPORATION

Inventor： Toru HIROSHIMA ,  Yuta KAWAI ,  Sho KUME ,  Kenji NOSE ,  Yuki WADA ,  Naoki OZAWA

IPC: B23Q11/00 ,  B23D45/02 ,  B23Q11/06

CPC classification number: B64F5/60 ,  B23D47/005 ,  B23Q11/06 ,  B27B9/00

Abstract: A machining device may include an electric motor, a blade rotatably driven by the electric motor for machining a workpiece, and a blade cover configured to surround the blade. A resonance sound reduction device may be disposed at the blade cover and may reduce air vibration generated by the rotation of the blade.

Abstract translation: 加工装置可以包括电动机，由用于加工工件的电动机可旋转地驱动的叶片以及被构造成围绕叶片的叶片盖。 共鸣式降噪装置可以设置在叶片盖上并且可以减少由叶片旋转产生的空气振动。