Patent ID: 9138884
Filing Date: 2015-09-22
Classification: B23Q,B25F

Abstract:
1. A handheld work apparatus comprising: an electric drive motor; a power supply unit for said drive motor; a housing having a power supply receptacle for said power supply unit; an electronic control; a fan wheel for moving cooling air; said drive motor being configured to drive said fan wheel; said housing defining an interior housing space; said electronic control being arranged in said interior housing space; a motor receptacle for accommodating said drive motor therein; said housing including a first longitudinal side and a second longitudinal side arranged opposite to said first longitudinal side; said housing having at least one air inlet opening for the cooling air and having an air outlet opening through which the cooling air passes out of said housing; said at least one air inlet opening being arranged on said first longitudinal side so as to fluidly communicate with said interior housing space; said fan wheel drawing in a first cooling air flow through said at least one air inlet opening during operation; said first cooling air flow entering said housing through said at least one air inlet opening on said first longitudinal side and flowing in said interior housing space from said first longitudinal side toward said second longitudinal side so as to first cool said electronic control; said first cooling air flow being redirected by deflecting structure in said interior housing space adjacent to said second longitudinal side in said housing and flowing back toward said first longitudinal side and said air outlet opening; said drive motor being disposed between said second longitudinal side and said air outlet opening so as to be cooled by said first cooling air flow subsequent to the cooling of said electronic control; said power supply receptacle and said power supply unit being configured to conjointly define a second air inlet opening for passing a second cooling air flow into said power supply receptacle; said housing including passage defining structure configured to fluidly connect said power supply receptacle to said interior housing space so as to permit said second cooling air flow to enter said interior housing space from said power supply receptacle to also cool said electronic control; and, said fan wheel being fluidly connected to said interior housing space so as to move said first and second cooling flows therefrom to said air outlet opening.