Floor surfacing machine

• US 10,029,341 B2
• Filed: 03/27/2017
• Issued: 07/24/2018
• Est. Priority Date: 09/25/2014
• Status: Active Grant

• Current Assignee: Husqvarna AB (HUSQVARNA)
• Original Assignee: Husqvarna AB (HUSQVARNA)
• Inventors: Berg, Johan, Rosen, Magnus, Freidlitz, Lars, Madbro, Par, Leff-Hallstein, Joakim
• Primary Examiner(s): ROSE, ROBERT A
• Application Number:
  US15/469,686
• Publication Number:
  US 20170197289A1
• Time in Patent Office: 484 Days
• Field of Search: 451353, 451350, 451359
• CPC Class Codes: B24B 27/0076 grinding machines comprising two or more grinding tools
• CPC Class Codes: B24B 27/0084 the grinding wheel support being angularly adjustable
• CPC Class Codes: B24B 41/047 Grinding heads for working on plane surfaces
• CPC Class Codes: B24B 47/12 by mechanical gearing or electric power B24B47/16 takes precedence
• CPC Class Codes: B24B 7/18 for grinding floorings, walls, ceilings or the like machines or devices for cleaning floorings A47L11/00, A47L13/00
• CPC Class Codes: B24B 7/186 with disc-type tools

Abstract

The present invention relates to a floor surfacing machine comprising a frame that is carried by a first wheel and a second wheel. The floor surfacing machine further comprises a first motor, a handle arrangement, at least one planetary head that is rotatably mounted to the frame and at least one satellite surfacing head that is rotatably mounted to the planetary head, where the first motor is arranged to propel the planetary head. The floor surfacing machine comprises a first control unit, and a remote control panel which in turn comprises a second control unit) that is arranged to communicate with the first control unit. The floor surfacing machine also comprises a second motor that is arranged to propel the satellite surfacing heads such that the planetary head and the satellite surfacing heads are independently operable.

Claims

1. A floor surfacing machine comprising:

a frame that is carried by at least a first wheel and a second wheel,

at least one operating head that is rotatably mounted to the frame,

a control unit, and

a wheel drive assembly for individually controlling the first wheel and the second wheel,

wherein the control unit is arranged to add an oscillation control signal to a wheel drive control signal to individually vary a speed of the first wheel in relation to a speed of the second wheel to generate self-oscillation of the operating head to laterally displace the operating head between a leftmost position and a rightmost position in an oscillating manner based on the oscillation control signal such that an increased surfacing width is obtained.

4. A floor surfacing machine according to claim 1, wherein the control unit is arranged to determine a heading of the operating head and thereby adjust the wheel drive control signal and the oscillation control signal for a smoother operation, taking into account a propelling contribution provided by the operating head, wherein if the operating head provides a propelling contribution resulting in a rotation in one direction, the wheel drive control signal and the oscillation control signal are adjusted so that the wheel drive assembly drives harder in another direction to compensate for the propelling contribution provided by the operating head and drives softer in the one direction to cooperate with the rotation provided by the operating head.

5. A floor surfacing machine according to claim 1, wherein the floor surfacing machine is a floor cleaning machine.

6. A floor surfacing machine according to claim 1, wherein the floor surfacing machine is a vacuum floor cleaning machine.

7. A floor surfacing machine according to claim 1, wherein the floor surfacing machine is a floor grinding machine or a floor polishing machine.

2. A floor surfacing machine comprising:

a frame that is carried by at least a first wheel and a second wheel,

at least one operating head that is rotatably mounted to the frame,

a control unit, and

a wheel drive assembly for individually controlling the first wheel and the second wheel,

wherein the control unit is arranged to add an oscillation control signal to a wheel drive control signal to individually vary a speed of the first wheel in relation to the second wheel for laterally displacing the operating head between a leftmost position and a rightmost position in an oscillating manner such that an increased surfacing width is obtained, and

wherein the control unit is arranged to determine that a surface being serviced presents uneven surfacing conditions and in response thereto;

adjust the oscillation control signal so that the floor surfacing machine spends more time on one side, or to adjust an outermost position on one side so that the floor surfacing machine turns more to that side.

8. A floor surfacing machine according to claim 2, wherein the floor surfacing machine is a floor grinding machine or a floor polishing machine.

10. A floor surfacing machine according to claim 2, wherein the floor surfacing machine is a vacuum floor cleaning machine.

12. A floor surfacing machine according to claim 2, wherein the floor surfacing machine is a floor cleaning machine.

3. A floor surfacing machine comprising:

a frame that is carried by at least a first wheel and a second wheel,

at least one operating head that is rotatably mounted to the frame,

a control unit, and

a wheel drive assembly for individually controlling the first wheel and the second wheel,

wherein the control unit is arranged to add an oscillation control signal to a wheel drive control signal to individually vary a speed of the first wheel in relation to the second wheel for laterally displacing the operating head between a leftmost position and a rightmost position in an oscillating manner such that an increased surfacing width is obtained, and

wherein the control unit is arranged to determine that a wheel is rotating at a higher than expected rate and to thereby reduce the speed of the rotating wheel, reduce the speed of the other wheel, or increase the speed of the other wheel if the other wheel is rotating in a direction different from a direction of rotation of the rotating wheel.

9. A floor surfacing machine according to claim 3, wherein the floor surfacing machine is a floor grinding machine or a floor polishing machine.

11. A floor surfacing machine according to claim 3, wherein the floor surfacing machine is a vacuum floor cleaning machine.

13. A floor surfacing machine according to claim 3, wherein the floor surfacing machine is a floor cleaning machine.