Brushless motor system for power tools
US11691260B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2021 |
| Grant date | Jul 4, 2023 |
| Priority date | — |
| Expiry date | Oct 6, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power tool is provided including a gear case having a spindle, a motor case connected to a rear end of the gear case along a longitudinal axis; a handle portion extending from a rear end of the motor case along the longitudinal axis; a motor housed inside the motor case; a fan in rotational connection with the motor; at least one air intake arranged at least one of the motor case or the handle portion near the rear end of the motor case; and a power module including power switches for driving the motor and a heat sink. The power module is housed in at least one of the motor case or the handle portion near the rear end of the motor case such that rotation of the fan causes air flow to enter through the air intake and flow near the heat sink and through the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.