Wheel support arrangement for an autonomous cleaning apparatus

• US 7,275,280 B2
• Filed: 02/25/2002
• Issued: 10/02/2007
• Est. Priority Date: 02/28/2001
• Status: Active Grant

• Current Assignee: Aktiebolaget Electrolux
• Original Assignee: Aktiebolaget Electrolux
• Inventors: Mennborg, Lars, Haegermarck, Anders, Danestad, Ulrik
• Primary Examiner(s): Snider; Theresa T.
• Application Number:
  US10/469,261
• Publication Number:
  US 20040143927A1
• Time in Patent Office: 2,045 Days
• Field of Search: 153/19, 153/401, 153/403, 153/62, 153/39, 153/77, 305/134, 305/141, 301/111.05, 301/133
• US Class Current: 15/340.1
• CPC Class Codes: A47L 2201/04 Automatic control of the travelling movement; Automatic obstacle detection
• CPC Class Codes: A47L 9/009 Carrying-vehicles; Arrangements of trollies or wheels; Means for avoiding mechanical obstacles

Abstract

A carrier, such as an autonomous cleaning apparatus, has a self-adjusting wheel assembly that can move vertically, thereby enabling the carrier to readily pass over a surface. The wheel assembly may include microswitch, which activates a control mechanism for the carrier when a wheel assembly is in a predetermined position along its path of vertical movement. Rollers can be located at the bottom of the carrier to function in cooperation with the wheel assemblies so as to facilitate the ability of the carrier to pass over obstacles. This ability may be enhanced by constructing the bottom of the front portion of the carrier so that it is slanted or inclined upwardly in a direction outward from the bottom of the carrier. A driving wheel may be rotatably attached to a wheel support, and which may also support a power source and a transmission.

Claims

1. An assembly by means of which a carrier may move over a surface irrespective of obstructions or obstacles on the surface, the assembly comprising a motive means for engaging and moving over the surface so as to transport the carrier when the motive means is in an operative mode with the carrier, the motive means being adapted for displacement in both upward and downward directions and actuating means associated with the motive means for actuating a control mechanism when the motive means is in the operative mode and the motive means is in a predetermined position along its path of upward and downward movement.

2. The assembly of claim 1, wherein the motive means includes a support means and a force-creating means for providing support along a vertical path supported by the support means for urging the motive means in a direction downward from the carrier when the assembly is in the operative mode.

3. The assembly of claim 2 wherein the motive means includes a guide means slidably connected to the support means and adapted to be fixed to the carrier so as to cause the motive means to traverse a vertical path in its upward and downward displacement.

4. The assembly of claim 3 wherein the motive means includes a power source mounted on the support means for providing power to the motive means.

5. The assembly of claim 4 wherein the motive means includes a wheel fixed to a shaft rotatably mounted on the support means and driven by the power source.

6. The assembly of claim 5 wherein the motive means includes a transmission means mounted on the support means and interposed between the power source and wheel for operatively connecting the power source and the shaft.

7. The assembly of claim 6 wherein the force-creating means is a compression spring.

8. A motive means for engaging and moving over a surface so as to transport a carrier when the motive means is in an operative mode with the carrier, the motive means being adapted for displacement in both upward and downward directions, the motive means including:

a support means for providing support along a vertical path,

force-creating means supported by the support means for urging the motive means in a direction downward from the carrier when the motive means is in the operative mode and

a guide means slidably connected to the support means and adapted to be fixed to the carrier so as to cause the motive means to traverse a vertical path in its upward and downward displacement, the motive means further including a power source mounted on the support means for providing power to the motive means.

9. The motive means of claim 8 including a wheel fixed to a shaft rotatably mounted on the support means and driven by the power source.

10. The motive means of claim 9 including a transmission means mounted on the support means and interposed between the power source and wheel for operatively connecting the power source and the shaft.

11. The motive means of claim 10 wherein the force-creating means is a compression spring.

12. An autonomous surface-conditioning apparatus having a housing containing surface-conditioning elements and including a control mechanism for controlling the operation of the surface-conditioning apparatus, and a motive means attached to the housing by means of which the apparatus may move over a surface being conditioned irrespective of obstructions or obstacles on the surface, the motive means being adapted for displacement in both upward and downward directions and including actuating means for actuating the control mechanism when the motive means is in a predetermined position along its path of upward and downward displacement.

13. The autonomous surface-conditioning apparatus of claim 12 wherein the motive means for providing support along a vertical path includes a support means and a force-creating means supported by the support means for urging the motive means in a direction downward from the apparatus.

14. The autonomous surface-conditioning apparatus of claim 13 wherein the motive means includes a guide means slidably connected to the support means and fixed to the apparatus so as to cause the motive means to traverse a vertical path in its upward and downward displacement.

15. The autonomous surface-conditioning apparatus of claim 14 wherein the motive means includes a power source mounted on the support means for providing power to the motive means.

16. The autonomous surface-conditioning apparatus of claim 15 wherein the motive means includes a wheel fixed to a shaft rotatably mounted on the support means and driven by the power source.

17. The autonomous surface-conditioning apparatus of claim 16 wherein the motive means includes a transmission means mounted on the support means and interposed between the power source and wheel for operatively connecting the power source and the shaft.

18. The autonomous surface-conditioning apparatus of claim 17 wherein the force-creating means is a compression spring.

19. The autonomous surface-conditioning apparatus of claim 12 wherein the surface-conditioning elements comprise elements for vacuum cleaning a surface.

20. The autonomous surface-conditioning apparatus of claim 19 including front and rear rotatable support means rotatably fixed to the bottom of the apparatus and acting to both establish a gap between the bottom of the apparatus and the surface being conditioned and a site about which the apparatus may tilt.

21. The autonomous surface-conditioning apparatus of claim 20 including a further rotatable support means rotatably fixed to the bottom of the apparatus forwardly and upwardly of the front rotatable support means.

22. The autonomous surface-conditioning apparatus of claim 21 wherein the front portion of the bottom of the apparatus is slanted upwardly in an outward direction.

23. An autonomous surface-conditioning apparatus having a housing containing surface-conditioning elements and including an assembly attached to the housing by means of which the apparatus may move over a surface being conditioned irrespective of obstructions or obstacles on the surface, the assembly comprising a motive means for engaging and moving over the surface so as to transport the apparatus, the motive means being adapted for displacement in both upward and downward directions, the motive means including a support means for providing support along a vertical path, a force-creating means supported by the support means for urging the motive means in a direction downward from the apparatus, and a guide means fixed to the apparatus and slidably connected to the support means so as to cause the motive means to traverse a vertical path in its upward and downward displacement.

24. The autonomous surface-conditioning apparatus of claim 23 wherein the motive means includes a power source mounted on the support means for providing power to the motive means.

25. The autonomous surface-conditioning apparatus of claim 24 wherein the motive means includes a wheel fixed to a shaft rotatably mounted on the support means and driven by the power source.

26. The autonomous surface-conditioning apparatus of claim 25 wherein the motive means includes a transmission means mounted on the support means and interposed between the power source and wheel for operatively connecting the power source and the shaft.

27. The autonomous surface-conditioning apparatus of claim 26 wherein the force-creating means is a compression spring.

28. The autonomous surface-conditioning apparatus of claim 23 wherein the surface-conditioning elements comprise elements for vacuum cleaning a surface.

29. The autonomous surface-conditioning apparatus of claim 28 including front and rear rotatable support means rotatably fixed to the base of the apparatus and acting to both establish a gap between the bottom of the apparatus and the surface being conditioned and a site about which the apparatus may tilt.

30. The autonomous surface-conditioning apparatus of claim 29 including a further rotatable support means rotatably fixed to the bottom of the apparatus forwardly and upwardly of the front rotatable support means.

31. The autonomous surface-conditioning apparatus of claim 30 wherein the front portion of the bottom of the apparatus is slanted upwardly in an outward direction.

32. An autonomous surface-conditioning apparatus having a housing containing surface-conditioning elements and including an assembly attached to the housing by means of which the apparatus may move over a surface being conditioned irrespective of obstructions or obstacles on the surface, the assembly comprising a motive means for engaging and moving over the surface so as to transport the apparatus, the motive means being adapted for displacement in both upward and downward directions, front and rear rotatable support means rotatably fixed to the bottom of the apparatus and acting to both establish a gap between the bottom of the apparatus and the surface being conditioned and a site about which the apparatus may tilt.

33. The autonomous surface-conditioning apparatus of claim 32 wherein the surface-conditioning elements comprise elements for vacuum cleaning a surface.

34. The autonomous surface-conditioning apparatus of claim 32 including a further rotatable support means rotatably fixed to the bottom of the apparatus forwardly and upwardly of the front rotatable support means.

35. The autonomous surface-conditioning apparatus of claim 33 wherein the front portion of the bottom of the apparatus is slanted upwardly in an outward direction.