Patent Application
20130291319
The present invention relates to a floor sweeping machine and particularly to a cleaning structure for autonomous moving floor sweeping machines.
U.S. Pat. No. 6,883,201 entitled: “Autonomous floor-cleaning robot” and No. 6,594,844 entitled: “Coverage robot mobility” disclose two types of autonomous moving floor sweeping machines. They have a plurality of sensors located at the lower side, front side or periphery to prevent strong impact when encounter obstacles, or falling to a descending staircase and resulting in damage occurred to the floor sweeping machines, or vacuum cleaners or floor moping apparatus. They have a sweeping roller which sweeps the dirt backwards in the direction of drive wheels at the rear end. To prevent such happening the motor driving the sweeping roller has limitation in spinning speed, and higher speed motors cannot be used to improve sweeping efficiency. As a result, sweeping operation has to be performed back and forth many times to thoroughly clean the floor. Hence the aforesaid conventional techniques cannot sweep floor rapidly and efficiently. This is a big problem pending to be resolved.
The primary object of the present invention is to overcome the disadvantages of the conventional techniques by providing a flexible barrier plate to prevent dirt from passing through under a dust guide plate and moving rearward to achieve rapid and efficient floor sweeping operation.
Another object of the invention is to resolve the shortcomings of the conventional techniques by providing a sweeping roller spinning at high speeds to sweep floor quickly and efficiently.
To achieve the aforesaid primary object the present invention provides a cleaning structure for an autonomous moving floor sweeping machine. The autonomous moving floor sweeping machine includes at least a cleaning structure, a battery to support operation of the floor sweeping machine, a driving wheel to drive movement of the floor sweeping machine, a first servomotor to drive the driving wheel, a second servomotor to drive the cleaning structure to perform cleaning tasks that spins at high speeds preferably between 2700 and 4100 rpm, a microcontroller unit (MCU in short hereinafter) to control spinning of the first and second servomotors, a light emission member activated by a voltage sent and converted by the MCU, a light receiving member to receive light from the light emission member and convert the light to send to operate the MCU, and a function key to select preset functions provided by the MCU to control the first and second servomotors. The cleaning structure includes a floor sweeping roller driven by the second servomotor to spin and clear dirt on the floor, a dust guide plate located at one side of the floor sweeping roller and interposed between the driving wheel and floor sweeping roller, a flexible barrier plate located below the dust guide plate in contact with the floor to prevent the dirt from passing through under the dust guide plate towards the driving wheel, a dust guarding hood located at another side of the floor sweeping roller, and a fender jutting and extended below the dust guarding hood to prevent residual dirt from forming falling dust dropping to the floor.
In one aspect the cleaning structure of the invention also includes a dust collection chamber partitioned by the dust guide plate that has a passage communicating with the floor sweeping roller.
In another aspect the cleaning structure of the invention further includes a floor sweeping side roller located at a distal end of the floor sweeping roller and driven to spin synchronously with the floor sweeping roller.
In yet another aspect the barrier plate is coupled on a lower side of the dust guide plate in a detachable manner.
In yet another aspect the spinning speed of the second servomotor is ranged from 2700 rpm to 4100 rpm.
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
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While the preferred embodiment of the invention has been set forth for the purpose of disclosure, it is not the limitation of the invention, modifications of the disclosed embodiment of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.
