US 12,377,513 B2
Electric tool grinding machine and casing thereof
Bach Pangho Chen, Claremont, CA (US)
Assigned to X'POLE PRECISION TOOLS INC., Taoyuan (TW)
Filed by X'POLE PRECISION TOOLS INC., Taoyuan (TW)
Filed on Nov. 10, 2022, as Appl. No. 17/984,709.
Prior Publication US 2024/0157509 A1, May 16, 2024
Int. Cl. B24B 23/02 (2006.01); B24B 47/12 (2006.01); B24B 47/26 (2006.01); H02K 5/04 (2006.01); H02K 7/14 (2006.01); H02K 9/06 (2006.01); H02K 9/16 (2006.01)
CPC B24B 23/028 (2013.01) [B24B 23/02 (2013.01); B24B 47/12 (2013.01); B24B 47/26 (2013.01); H02K 5/04 (2013.01); H02K 7/145 (2013.01); H02K 9/06 (2013.01); H02K 9/16 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electric tool grinding machine, comprising:
an electric motor;
an airflow generating member, rotating when the electric motor being activated; and
a casing, comprising a hollow shell, a motor housing located in the hollow shell and provided for disposing the electric motor, two partitioning plates located between a side wall of the motor housing and the hollow shell, at least one air outlet facing the airflow generating member, at least one first air inlet formed on the hollow shell, and at least one second air inlet formed on the hollow shell and spaced apart from the first air inlet, wherein the two partitioning plates define a connecting line therebetween, and the connecting line divides the motor housing into an air inlet portion and an air outlet portion communicating with the air inlet portion, the at least one air outlet is disposed between the air outlet portion and the hollow shell, the at least one first air inlet faces the air inlet portion of the motor housing, when the airflow generating member is activated, a pressure difference is generated by the intake air of the at least one first air inlet between the hollow shell and the air inlet portion of the motor housing, and air is drawn into the second air inlet.