Cooling housing with an internal space for accommodation of an electric motor, whereby the electric motor consists of a centrally pivoting rotor and a stator surrounding the rotor, and whereby the stator comprises a multitude of electrical windings, having the following components: - an internal cooling wall that is arranged about the stator and is in heatconducting connection to the stator and forms the border, with respect to the inside, of coolant channels of the first cooling circuit that extend between a first coolant inlet and a first coolant outlet; - at least one additional cooling wall that separates the coolant channels of the first cooling circuit from coolant channels of a second cooling circuit, whereby the coolant channels of the second cooling circuit extend between a second coolant inlet and a second coolant outlet, and the second cooling circuit is separated from the first cooling circuit, wherein the second coolant is preferably oil; and - an external jacket that borders, with respect to the outside, the coolant channels of the second cooling circuit, characterized in that the second coolant inlet and the second coolant outlet each have coolant lines (46, 47) connected to them from the outside of cooling housing, whereby the one coolant line on the one end and the other coolant line on the other end of the cooling housing lead into the internal space of the cooling housing, wherein the coolant channels of the second cooling circuit are located radially further outside than the coolant channels of the first cooling circuit, wherein the additional cooling wall is arranged further outside than the internal cooling wall with respect to an axis of the motor. - an internal cooling wall that is arranged about the stator and is in heatconducting connection to the stator and forms the border, with respect to the inside, of coolant channels of the first cooling circuit that extend between a first coolant inlet and a first coolant outlet; - at least one additional cooling wall that separates the coolant channels of the first cooling circuit from coolant channels of a second cooling circuit, whereby the coolant channels of the second cooling circuit extend between a second coolant inlet and a second coolant outlet, and the second cooling circuit is separated from the first cooling circuit, wherein the second coolant is preferably oil; and - an external jacket that borders, with respect to the outside, the coolant channels of the second cooling circuit, characterized in that the second coolant inlet and the second coolant outlet each have coolant lines (46, 47) connected to them from the outside of cooling housing, whereby the one coolant line on the one end and the other coolant line on the other end of the cooling housing lead into the internal space of the cooling housing, wherein the coolant channels of the second cooling circuit are located radially further outside than the coolant channels of the first cooling circuit, wherein the additional cooling wall is arranged further outside than the internal cooling wall with respect to an axis of the motor. characterized in that the second coolant inlet and the second coolant outlet each have coolant lines (46, 47) connected to them from the outside of cooling housing, whereby the one coolant line on the one end and the other coolant line on the other end of the cooling housing lead into the internal space of the cooling housing, wherein the coolant channels of the second cooling circuit are located radially further outside than the coolant channels of the first cooling circuit, wherein the additional cooling wall is arranged further outside than the internal cooling wall with respect to an axis of the motor.