Patent ID: 8692429

Claim:
A motor casing comprising a hollow body, said hollow body comprising: a wall; a plurality of brackets; and a plurality of grooves; wherein: said plurality of brackets is disposed on the wall and one end of each of said plurality of brackets is coupled to the wall; said plurality of grooves is disposed in the wall; said plurality of brackets is formed in a middle portion of the wall by punching the wall in a circumferential direction whereby said plurality of grooves is formed adjacent to said plurality of brackets; each of said plurality of brackets comprises a fixed part having a first inner end and a first outer end, a middle connecting part having a second inner end and a second outer end, and a mounting part having a third inner end and a third outer end; said first inner end is connected to the wall and said first outer end is connected to said second inner end; said second outer end is connected to said third inner end; and said fixed part is oriented in a vertical plane, said mounting part is oriented in a horizontal plane, and said middle connecting part has a twisted shape.