Electric handheld sanding tool providing improved cooling efficiency

An electric sanding handheld tool providing improved cooling efficiency, comprising:

• a host body including a body and handgrip extended from the body, the body including a housing space inside;
• and
• a sanding assembly including an electric motor located in the housing space to output driving power through a transmission shaft and a circuit module coaxial with the electric motor and connected to external power to control operation of the electric motor;
• the transmission shaft being defined a first transmission portion at one end where the circuit module is located and a second transmission portion at another end opposing the circuit module, the second transmission portion being coupled with a sanding element which is exposed outside the host body and driven by the second transmission portion to generate sanding motion;
• wherein the circuit module and the electric motor are interposed by a cooling fan located on the first transmission portion, the cooling fan including a baseboard, an axial coupling portion located on the baseboard and coupled with the first transmission portion, a plurality of vanes located on the baseboard and centered about the axial coupling portion in a radial fashion, and an airflow orifice, the body including at least one air outlet corresponding to the vanes and at least one air inlet corresponding to either of the circuit module and the electric motor such that the transmission shaft is driven by the circuit module to synchronously drive the sanding element and the cooling fan through the first transmission portion and the second transmission portion so that the vanes spin to draw cold airflow through the air inlet to pass through the airflow orifice to dispel operation heat generated by the electric motor and the circuit module through the air outlet.