Brushed rotatory device
AssigneeJohnson Electric S.A.
InventorsAwade BADAFEM, Min LI
Life of this patent
Estimating the term…
Abstract
A brushed rotatory device (10) includes a stator, a rotor (14), an impeller (70), and a chamber (48) accommodating the commutator (16) and brushes (52) to contain debris from consumed brushes. The impeller causes air flow to dissipate heat generated by the rotatory device and may further carry the consumed brush debris away. The rotatory device includes flow channel(s) (72) which communicates with the impeller exhaust and accommodates absorbent or filtering materials (88) to trap the debris in the air flow. The commutation area may be double contained by using flange(s) (202) or wall(s) (42) to trap or confine a greater part of the debris in a localized region or to reduce noise from the rotatory device operations.
Claims20
A brushed rotatory device, comprising:
- a rotor including a shaft, a rotor core and a commutator attached to the shaft;
- a housing assembly surrounding the rotor;
- an impeller assembly mechanically coupled to the shaft of the rotor and adjacent to the commutator and remote from the rotor core;
- an end cap assembly attached to a first end of the housing assembly adjacent the commutator and including a base having at least one opening formed therein, a sidewall extending from the base around a periphery of the at least one opening in an axial direction of the shaft of the rotor and surrounding the commutator of the rotor, and a plurality of brush holders attached to the base;
- and
- a plurality of brushes disposed in the plurality of brush holders of the end cap assembly and in sliding contact with the commutator of the rotor.
A method of using a rotatory device, comprising:
- identifying a rotatory device including an end cap removably attached to a housing assembly of the rotatory device on a first end of rotatory device, wherein the housing assembly encloses a commutation area in which a commutator and multiple brushes are disposed;
- preventing debris generated by interactions between the multiple brushes and the commutator from migrating into one or more undesired areas;
- reducing a noise level of operations of the rotatory device by enclosing the at least a part of the commutation area within the housing assembly;
- and
- reducing heat generated by the operations of the rotatory device by guiding air flow past at least some internal components within the housing to a flow channel disposed on the end cap communicating with an exhaust on the end cap.
Dependencies are inferred from the claim text.