Electric power tool having cooling conduits
AssigneeRobert Bosch GmbH
InventorsPeter Stierle, Juergen Wiker
Life of this patent
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Abstract
An electric power tool includes an electric motor located in a housing (10) and a cooling device (16, 18, 20, 30, 32). The cooling device (16, 18, 20, 30, 32), at least in some regions, has a cooling conduit (30) that is closed off from an interior of the housing (10).
Claims26
An electric power tool, having an electric motor located in a housing (10), and having a cooling device (16, 18, 20, 30, 32), wherein the cooling device (16, 18, 20, 30, 32) comprises at least one intake nozzle (20) extending in a longitudinal direction (42) of the housing (10), wherein said longitudinal direction (42) extends parallel to at least one side wall of said housing (10), wherein said at least one intake nozzle (20) is mounted in an outer wall of the housing (10), wherein the cooling device (16, 18, 20, 30 32) further comprises a cooling conduit (30) which is located in direct proximity to the at least one intake nozzle (20) and is separated from the housing (10) in a direction which is transverse to said longitudinal direction (42) by means of an additional casing (38) located between the cooling conduit (30) and the housing (10) in the transverse direction, wherein said additional casing (38) is located in an interior of said housing (10), wherein said cooling conduit (30) directly abuts said at least one intake nozzle (20) and is closed off in direct proximity to said at least one intake nozzle (20) from an interior of the housing (10), wherein cooling air reaches the cooling conduit (30) directly and unhindered in an operating mode, wherein at least two said cooling conduits (30) are provided, wherein said cooling conduits (30) in their entirety extend in a direction which is parallel to the longitudinal direction (42) of the housing (10) and in their entirety are arranged parallel relative to each other, wherein said cooling conduits (30) are formed in an interior of said additional casing (38), wherein at least two said intake nozzles (20) are provided which extend in said cooling conduits (30), wherein at each of said two cooling conduits (30) one of said two intake nozzles (20) is arranged, and wherein said intake nozzles (20) and said cooling conduits (30) are provided to lead cooling air unhindered from said intake nozzles (20) to a motor housing (26) in which said electric motor is located.
Dependencies are inferred from the claim text.