Electric tools
Embodiments of the present invention may include an electric tool comprising an outer rotor type electric motor as a driving source and a stator supporting member made from metal. The motor preferably includes a stator and a rotator. The stator is preferably supported by the stator supporting member. The rotator is preferably located at an outer periphery of the stator.
1. An electric tool comprising:
a main body; and
a handle protruding from the main body;
the main body including:
a motor housing,
a blade case attached to the motor housing, and the blade case configured to cover a circular rotary cutting tool,
an outer rotor type electric motor provided in the motor housing as a driving source, and
a stator supporting member made from metal,
wherein the motor comprises a stator and a rotor wherein the stator is supported by the stator supporting member and the rotor is located at an outer periphery of the stator,
wherein the stator supporting member is formed by one member and includes a support portion configured to support the stator and an attaching portion configured to be attached to the blade case or the motor housing;
the main body further including:
an output shaft that is coupled to the rotor; and
a cooling fan coupled to the output shaft;
wherein the rotor includes air holes opposing the cooling fan through which cooling air passes to cool the stator.
2. An electric tool of claim 1 , further comprising an attachment base made from metal, wherein the stator supporting member is attached to the attachment base.
3. An electric tool of claim 2 , further comprising the circular rotary cutting tool rotated by the motor, wherein the blade case is configured to function as the attachment base.
4. An electric tool of claim 2 , wherein the motor housing is configured to function as the attachment base.
5. An electric tool of claim 1 , further comprising a bearing held by the stator supporting member, and wherein the output shaft is supported by the bearing.
6. An electric tool of claim 1 , wherein the cooling fan generates a motor cooling wind for cooling the stator supporting member.
7. An electric tool of claim 1 , wherein the attaching portion of the stator supporting member is attached to the blade case, and
wherein the blade case is made from metal.
8. An electric tool of claim 1 , wherein the attaching portion of the stator supporting member is attached to the motor housing, and
wherein the motor housing is made from metal.
9. An electric tool of claim 1 , wherein the cooling fan and the stator have substantially the same diameter, and
wherein the motor housing includes a first portion configured to accommodate the cooling fan and a second portion configured to accommodate the stator, and the first and second portions have substantially the same diameter.
10. An electric tool of claim 1 , wherein the rotor is between the fan and the stator, and the output shaft turns the cooling fan and draws air through the air holes to cool the stator.