| CPC A47L 9/0488 (2013.01) [A46B 9/005 (2013.01); A46B 9/026 (2013.01); A46B 13/005 (2013.01); A46B 13/02 (2013.01); A46D 1/0207 (2013.01); A47L 5/30 (2013.01); A47L 9/0411 (2013.01); A47L 9/0433 (2013.01); A47L 9/0444 (2013.01); A47L 9/0472 (2013.01); A47L 9/0477 (2013.01); A46B 2200/3033 (2013.01)] | 17 Claims |
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1. A surface cleaning apparatus, comprising:
a housing adapted to move across a surface to be cleaned;
a brush motor;
a brushroll rotatable about a brushroll axis, wherein the brushroll is operably coupled to and driven by the brush motor; and
a modular unit removably coupled to the housing, the modular unit comprising:
an edge brush comprising an attachment hub rotatable about a rotational axis and a cleaning implement configured to contact the surface to be cleaned; and
an edge brush drive coupling to operably couple the edge brush with the brushroll, the edge brush drive coupling comprising:
a gear train operably coupleable with the brushroll, wherein the gear train comprises:
a worm operably coupleable with the brushroll for rotation therewith, wherein the rotational axis of the attachment hub is disposed in front of the worm and forwardly of the brushroll axis; and
a two-stage gear having a first gear enmeshed with the worm and a second gear coupled with the first gear for rotation therewith, wherein the two-stage gear is disposed behind the worm and rearwardly of the brushroll axis;
a gear casing housing the gear train;
a driven gear coupled with the attachment hub and rotatable about the rotational axis; and
an edge brush belt directly coupling the second gear with the driven gear to transmit the rotational force of the two-stage gear to the edge brush.
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