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1. WO2021065273 - POWER TOOL

Publication Number WO/2021/065273
Publication Date 08.04.2021
International Application No. PCT/JP2020/032674
International Filing Date 28.08.2020
IPC
B24B 23/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
23Portable grinding machines, e.g. hand-guided; Accessories therefor
02with rotating grinding tools; Accessories therefor
B24B 55/05 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
55Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
04Protective covers for the grinding wheel
05specially designed for portable grinding machines
B24B 55/10 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
55Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
06Dust extraction equipment on grinding or polishing machines
10specially designed for portable grinding machines, e.g. hand-guided
B25F 5/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; HANDLES FOR HAND IMPLEMENTS; WORKSHOP EQUIPMENT; MANIPULATORS
FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
5Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
B25F 5/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; HANDLES FOR HAND IMPLEMENTS; WORKSHOP EQUIPMENT; MANIPULATORS
FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
5Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
02Construction of casings, bodies or handles
CPC
B24B 23/02
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
23Portable grinding machines, e.g. hand-guided; Accessories therefor
02with rotating grinding tools; Accessories therefor
B24B 55/05
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
55Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
04Protective covers for the grinding wheel
05specially designed for portable grinding machines
B24B 55/10
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
55Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
06Dust extraction equipment on grinding or polishing machines
10specially designed for portable grinding machines, e.g. hand-guided
B25F 5/00
BPERFORMING OPERATIONS; TRANSPORTING
25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
5Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
B25F 5/02
BPERFORMING OPERATIONS; TRANSPORTING
25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
5Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
02Construction of casings, bodies or handles
Applicants
  • 工機ホールディングス株式会社 KOKI HOLDINGS CO., LTD. [JP]/[JP]
Inventors
  • 片岡 幹博 KATAOKA Mikihiro
  • 一橋 直人 ICHIHASHI Naoto
  • 谷本 英之 TANIMOTO Hideyuki
Priority Data
2019-17872430.09.2019JP
2020-04549216.03.2020JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) POWER TOOL
(FR) OUTIL ÉLECTRIQUE
(JA) 動力工具
Abstract
(EN)
The present invention improves cooling performance in a direct-drive power tool in which a motor is housed in a sealed metal case. A grinder, having a metal cylindrical motor housing 30 that houses a brushless DC motor, and a grindstone 60 mounted on a rotary shaft (17) extending downwards from the motor housing 30, wherein the motor 10 has a structure that is sealed by a cylindrical part 31, a top cover 35, and a bottom cover 40. The motor housing 30 has formed thereon an extending part 30b for mounting a wheel guard 65, and on the inner side of the extending part 30b, a fan 50 is mounted on the rotary shaft (17). Air flows along the lower surface of the motor housing 30 due to the rotation of the fan 50, and the motor 10 is also cooled through the motor housing 30.
(FR)
La présente invention améliore les performances de refroidissement dans un outil électrique à entraînement direct dans lequel un moteur est logé dans un boîtier métallique isolé. Une meuleuse, ayant un carter de moteur cylindrique en métal (30) qui loge un moteur CC sans balai, et une meule (60) montée sur un arbre rotatif (17) s'étendant vers le bas à partir du carter de moteur (30), le moteur (10) ayant une structure qui est isolée par une partie cylindrique (31), un couvercle supérieur (35) et un couvercle inférieur (40). Une partie d'extension (30b) destinée au montage d’un protège-meule (65) est formée sur le carter de moteur (30), et sur le côté intérieur de la partie d'extension (30b), un ventilateur (50) est monté sur l'arbre rotatif (17). De l’air circule le long de la surface inférieure du carter de moteur (30) en raison de la rotation du ventilateur (50), et le moteur (10) est également refroidi à travers le carter de moteur (30).
(JA)
モータを金属製の密閉ケース内に収容したダイレクトドライブ方式の動力工具の冷却性能を向上させる。ブラシレスDCモータを収容する金属製の筒状のモータハウジング30と、モータハウジング30から下側に回転軸(17)が延在し、回転軸(17)に取り付けられる砥石60を有するグラインダにおいて、モータ10を、筒状部31とトップカバー35とボトムカバー40による密閉構造とする。モータハウジング30にはホイルガード65を取り付けるための延出部30bが形成され、延出部30bの内側において回転軸(17)にファン50を取りつけた。ファン50の回転によってモータハウジング30の下面に沿って空気が流れ、モータハウジング30を介してモータ10も冷却される。
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