Closure system for electric motor and corresponding closing procedure

A closure system for a seat of an electric motor adapted to house a rotor of the electric motor, comprising:

• a lid configured for being at least partially inserted into the seat, an annular gasket arranged on the lid for isolating the seat, and a retaining element;
• and wherein
• the lid comprises a central portion, a plurality of tabs radially protruding from the central portion to limit the insertion of the lid in the seat, and a free area formed between each two adjacent tabs;
• the retaining element comprises a main body having an opening which at least partially receives the central portion of the lid, and a plurality of tabs radially protruding from the main body of the retaining element;
• the retaining element is elastically pressed against the central portion of the lid, and an opposite radially protruding end of the retaining element is arranged in the free area to elastically abut against the seat to prevent the lid from being removed from the seat.

An electric motor with closure system comprises:

• a seat adapted to receive a rotor;
• a closure system is at least partially adapted to the seat;
• and wherein
• the closure system comprises a lid arranged to be at least partially inserted into the seat, an annular gasket arranged in the lid for isolating the seat, and a retaining element;
• the lid comprises a central portion, a plurality of tabs radially protruding from the central portion to limit the insertion of the lid in the seat, and a free area formed between each two adjacent tabs;
• the retaining element comprises a main body having an opening which at least partially receives the lid, and a plurality of tabs radially protruding from the main body of the retaining element;
• the retaining element is elastically pressed against the central portion of the lid, and an opposite radially protruding end of the retaining element is arranged in the free area to elastically abut against the seat to prevent the lid from being removed from the seat.

A closure method of a seat of an electric motor adapted to house a rotor of the electric motor, comprising the steps of:

• disposing an annular gasket on a housing defined in a lid comprising a central portion and a plurality of tabs radially protruding from the central portion, which from a free area therebetween;
• inserting at least a protrusion of a portion of the central portion of the lid into an opening of a main body of a retaining element which includes a plurality of tabs radially protruding from the main body of the retaining element;
• the insertion being made so as to dispose each tab of the retaining element in the free area of the lid;
• inserting the lid into the seat, the lid being disposed at least partially in the retaining element and receiving the annular gasket, so that the annular gasket is disposed in contact between the lid and the seat for sealing, a first end of the main body of the retaining element presses elastically against the central portion of the lid, and a second radially protruding end of the tabs of the retaining element elastically abuts against the seat, so as to prevent an extraction of the lid from the seat.