Cooling system for a power tool
A power tool ( 1 ) is disclosed comprising an electric motor ( 3 ) configured to power a tool ( 5 ) of the power tool ( 1 ), a power supply arrangement ( 7, 9 ) configured to supply electricity to the electric motor ( 3 ), and an air-cooling path ( 11, 11 ′) extending past at least portions of the electric motor ( 3 ) and the power supply arrangement ( 7, 9 ) so as to cool the electric motor ( 3 ) and the power supply arrangement ( 7, 9 ) when air is flowing through the air-cooling path ( 11, 11 ′). The power tool ( 1 ) further comprises a fan ( 13 ) arranged in the air-cooling path ( 11, 11 ′) between the electric motor ( 3 ) and the power supply arrangement ( 7, 9 ). The fan ( 13 ) is configured to generate an air flow through the air-cooling path ( 11, 11 ′) in a flow direction (d) from the electric motor ( 3 ) towards the power supply arrangement ( 7, 9 ).
1 . A hand-held power tool comprising:
an electric motor configured to power a tool of the power tool,
a power supply arrangement configured to supply electricity to the electric motor,
an air-cooling path extending past at least portions of the electric motor and the power supply arrangement so as to cool the electric motor and the power supply arrangement when air is flowing through the air-cooling path, and
a fan arranged in the air-cooling path between the electric motor and the power supply arrangement,
wherein the fan is configured to generate an air flow through the air-cooling path in a flow direction from the electric motor towards the power supply arrangement,
wherein the power tool comprises a housing accommodating the electric motor and the power supply arrangement,
where in the electric motor comprises a motor casing, and portions of the air-cooling path extend through the motor casing, and around and past the motor casing, and
wherein the electric motor is arranged to power the fan.
2 . The hand-held power tool according to claim 1 , wherein the fan is arranged on a motor shaft of the electric motor.
3 . A hand-held power tool comprising:
an electric motor configured to power a tool of the power tool,
a power supply arrangement configured to supply electricity to the electric motor,
an air-cooling path extending past at least portions of the electric motor and the power supply arrangement so as to cool the electric motor and the power supply arrangement when air is flowing through the air-cooling path, and
a fan arranged in the air-cooling path between the electric motor and the power supply arrangement,
wherein the fan is configured to generate an air flow through the air-cooling path in a flow direction from the electric motor towards the power supply arrangement,
wherein the power tool comprises a housing accommodating the electric motor and the power supply arrangement,
where in the electric motor comprises a motor casing, and portions of the air-cooling path extend through the motor casing, and around and past the motor casing,
wherein the electric motor comprises a motor shaft arranged to rotate around a motor axis, and wherein the flow direction of the air flow generated by the fan through the air-cooling path at the location of the electric motor extends substantially parallel to the motor axis.
4 . A hand-held power tool comprising:
an electric motor configured to power a tool of the power tool,
a power supply arrangement configured to supply electricity to the electric motor,
an air-cooling path extending past at least portions of the electric motor and the power supply arrangement so as to cool the electric motor and the power supply arrangement when air is flowing through the air-cooling path, and
a fan arranged in the air-cooling path between the electric motor and the power supply arrangement,
wherein the fan is configured to generate an air flow through the air-cooling path in a flow direction from the electric motor towards the power supply arrangement,
wherein the power tool comprises a housing accommodating the electric motor and the power supply arrangement,
where in the electric motor comprises a motor casing, and portions of the air-cooling path extend through the motor casing, and around and past the motor casing,
wherein the housing includes a first housing portion accommodating the electric motor, and a second housing portion accommodating the power supply arrangement, and
wherein the power tool comprises at least one wall that extends from the fan and seals an inner volume of the first housing portion from an inner volume of the second housing portion radially outside the fan.
5 . A hand-held power tool comprising:
an electric motor configured to power a tool of the power tool,
a power supply arrangement including a battery, and a control unit configured to selectively apply electricity from the battery to the electric motor,
an air-cooling path extending past at least portions of the electric motor, the battery and the control unit so as to cool the electric motor, the battery and the control unit when air is flowing through the air-cooling path, and
a fan arranged in the air-cooling path between the electric motor and the power supply arrangement,
wherein the electric motor is arranged to power the fan, and the fan is configured to generate an air flow through the air-cooling path in a flow direction from the electric motor towards the power supply arrangement,
wherein the power tool comprises a housing accommodating the electric motor and the power supply arrangement, and
wherein the electric motor comprises a motor casing, and portions of the air-cooling path extend through the motor casing, and around and past the motor casing.
6 . The hand-held power tool according to claim 5 , wherein the fan is arranged on a motor shaft of the electric motor.
7 . The hand-held power tool according to claim 5 , wherein the electric motor comprises a motor shaft arranged to rotate around a motor axis, and wherein the flow direction of the air flow generated by the fan through the air-cooling path at the location of the electric motor extends substantially parallel to the motor axis.
8 . The hand-held power tool according to claim 5 , wherein the housing includes a first housing portion accommodating the electric motor, and a second housing portion accommodating the power supply arrangement, and
wherein the power tool comprises at least one wall that extends from the fan and seals an inner volume of the first housing portion from an inner volume of the second housing portion radially outside the fan.