Floor washing-drying machine with automatically orienting scraping device
A floor washing-drying machine including a scraping device that is capable of automatic orientation. The scraping device follows changes of direction of the machine by a simple and effective orienting mechanism so as to wipe all the surface washed by a washing mechanism, without leaving any wet portions on the surface. An idle mode mechanism is achieved by a bushing to which the scraping device is connected. The bushing is mounted in an idle and axially slidable mode on the brush rotation shaft.
1. A floor washing-drying machine comprising:
a motor for driving a rotating shaft of one or more brushes adapted to scrub a washing liquid onto a floor;
a head including the brushes;
a scraping device to scrape the liquid after washing;
wherein the scraping device is mounted with respect to the rotating shaft in neutral, at an axial distance from the brushes and is maintained behind the brushes due to friction onto the floor, during forward and steering movements of the machine, while when the head is lifted up from the floor, due to gravity, the axial distance between brushes and scraping device becomes zero and the scraping device is engaged by means of rotation of the brushes to be positioned always behind the brushes, during backwards movement.
2. A floor washing-drying machine according to claim 1 , wherein the scraping device is connected to a bush mounted in neutral with respect to the rotating shaft of the brushes.
3. A floor washing-drying machine according to claim 2 , wherein the scraping device is connected to the bush by an elastic element or trimming.
4. A floor washing-drying machine according to claim 3 , wherein the bush comprises two rings sandwiching an axial portion of the elastic element, a radial portion of the elastic element being instead connected to the scraping device.
5. A floor washing-drying machine according to claim 4 , wherein the scraping device is connected to the radial portion of the elastic element through the head.
6. A floor washing-drying machine according to claim 2 , further comprising a guide fixed to a support of the driving motor of the brushes and positioned between a pin of the brushes and the bush, the guide including an end toward the floor and with a flanged edge toward the exterior of a same guide to avoid an accidental slipping off of the head or of the scraping device.
7. A floor washing-drying machine according to claim 1 , wherein the scraping device is mounted between the brushes and the head.
8. A floor washing-drying machine according to claim 1 , wherein the scraping device is mounted separated and external to the head.
9. A floor washing-drying machine according to claim 1 , further comprising a friction-engagement element between the scraping device and the brushes.
10. A floor washing-drying machine according to claim 1 , further comprising first and second stop elements adapted to cooperate with each other to provide a stop of the rotation of the scraping device when the scraping device is engaged with the brushes.