Power tool with motor air flow path control
AssigneeBlack & Decker Inc.
InventorsPhillip T. Miller, Brian E. Friedman
Life of this patent
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Abstract
In accordance with an aspect of the present disclosure, a power tool has an electric motor having a stator disposed in a field case. The stator has field coils having opposed axial ends that extend axially outwardly from opposed axial ends of a lamination stack of the stator. An armature is disposed in the stator and has a shaft on which a fan is disposed. There are gaps between the opposed axial ends of the respective field coils. The fan baffle includes an air direction member that extends into one of the gaps to direct air flow between the armature and the stator. In an aspect, the fan baffle includes a plurality of such members, one for each gap.
Claims8
A electric motor, comprising:
- a field case in which a stator and an armature are disposed, the armature disposed in the stator;
- the stator having field coils and the armature having coils;
- the armature having a shaft to which a fan is affixed;
- a fan baffle disposed about the fan;
- the fan baffle having an air flow direction member that extends into a gap between circumferential sides of the field coils at axial ends of the field coils to direct airflow into a passage between the armature and the stator.
A power tool, comprising:
- a member driven by an electric motor, the electric motor, including:
- a field case in which a stator and an armature are disposed, the armature disposed in the stator;
- the stator having field coils and the armature having coils;
- the armature having a shaft to which a fan is affixed;
- a fan baffle disposed about the fan;
- the fan baffle having an air flow direction member that extends into a gap between circumferential sides of the field coils at axial ends of the field coils to direct airflow into a passage between the armature and the stator.
Dependencies are inferred from the claim text.