Motor having an external heat sink for a power tool
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United States of America Patent
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Oct 5, 2021
Grant Date -
Sep 5, 2019
app pub date -
Feb 21, 2019
filing date -
Mar 2, 2018
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A motor assembly is provided with a stator including a lamination stack forming a stator core, stator teeth inwardly projecting from the stator core, and stator windings wound around the stator teeth in connected in phases. A rotor is rotatably disposed within the stator with a shaft, a rotor lamination stack mounted on the shaft, and at least one bearing mounted on the shaft. An external heat sink is provided including a main body defining a hollow opening form-fittingly receiving the stator therein in thermal communication with the stator. A bearing support structure is provided having a main body radially arranged and secured the main body of the external heat sink, the bearing support structure forming a central bearing pocket arranged to receive and support the bearing of the rotor therein to axially and radially support the rotor with respect to the heat sink.
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