JPH07289488A - Floor surface cleaning robot - Google Patents

Abstract

PURPOSE:To provide the structure of a water tank capable of eliminating the unbalnce of load caused by a change in the amts. of water in the fresh water tank and sewage tank arranged on the left and right parts of a truck during the running of a floor surface cleaning robot and keeping straight advance properties. CONSTITUTION:The water tank placed on the truck 1 of a floor surface cleaning robot is partitioned by two partition plates 5a, 5b so that a sewage tank 7 is arranged to the central part of the water tank and two fresh water tanks 6a, 6b each having volume almost half that of the sewage tank 7 are arranged on both left and right sides of the sewage tank 7. A pipe is connected to the bottom surfaces of two fresh water tanks 6a, 6b to always keep the water levels of both fresh water tanks 6a, 6b equal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor cleaning robot, and more specifically, in order to facilitate self-propelled control of the floor cleaning robot, an unbalanced amount of water in a sewage tank on a trolley and a fresh water tank is set. It relates to a mechanism for preventing.

[0002]

2. Description of the Related Art A conventional floor cleaning robot will be described. As shown in FIG. 2 and FIG. 3, a pair of left and right drive wheels 2, a front driven wheel 3 and a rear driven wheel 4 are provided at the center of the lower surface of the trolley 1, and the inside of the water tank placed on the trolley 1 is divided into left and right partition plates. 5 is divided into a fresh water tank 6 and a dirty water tank 7, and a sprinkling pipe (not shown) is led out from the fresh water tank 6 to the vicinity of the brush 8 on the lower surface of the carriage 1, and a suction device 9 for sucking the dirty water on the floor is used as the dirty water. It is connected to the tank 7. A lid body 11 provided with a sealing packing 10 in the opening 7a of only the dirty water tank 7 above the fresh water tank 6 and the dirty water tank 7.
Is covered. When the floor cleaning robot with this configuration is operated, water is sprinkled from the fresh water tank 6 to the floor surface with a sprinkling pipe, the brush 8 is rotated to polish the floor surface, and the dirty water remaining on the floor surface is sucked into the dirty water tank 7 by the suction device. Suction and self-run while cleaning.
Therefore, the fresh water tank 6 is initially full and the dirty water tank 7 is empty, and finally the fresh water tank 6 is empty and the dirty water tank 7 is filled with dirty water. In this case, the center of gravity of the trolley 1 greatly changes with time, and the left and right drive wheels 2 and front driven wheels 3 are moved.
Since the load applied to the rear driven wheel 4 changes, it becomes difficult to maintain the straightness of the floor cleaning robot. There is also a method of arranging the fresh water tank 6 and the dirty water tank 7 in the front and rear, but this increases the front-back movement of the center of gravity and complicates the suspension mechanism corresponding to the change in the load applied to the front and rear driven wheels 3 and 4. It will be.

[0003]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention eliminates the load imbalance due to the change in the amount of water in the fresh water tank and the dirty water tank that changes during traveling,
An object of the present invention is to provide a structure of a water tank that stably maintains straightness of a floor cleaning robot.

[0004]

According to the present invention, a pair of left and right drive wheels are provided at the center of the lower surface of a bogie, a water tank consisting of a fresh water tank and a dirty water tank is mounted on the bogie, and a sprinkling pipe is provided from the fresh water tank. In a self-propelled floor cleaning robot that is connected to a sewage tank with a suction device that draws out near the rotating brush provided on the lower surface of the trolley, and connects the sewage tank to the sewage tank, divide the inside of the water tank into three The right and left sides are the fresh water tanks, and the same fresh water tanks are connected by pipes.

[0005]

According to the present invention, on the carriage of the floor cleaning robot, the fresh water tank is divided into two parts, which are arranged on the left and right sides with the dirty water tank interposed therebetween, and the bottom surfaces of the two fresh water tanks are connected by pipes. Even if water is supplied to the sprinkling pipe from either bottom of the two fresh water tanks, the water levels of the two fresh water tanks are the same, and it is possible to eliminate the change in the balance of the load applied to the carriage.

[0006]

EXAMPLE An example of the present invention will be described. As shown in FIG. 1, a sewage tank 7 is arranged in the center of a water tank placed on a trolley 1 of a floor cleaning robot, and the sewage tank 7 is sandwiched between the sewage tank 7 and the left and right sides of the sewage tank 7. One fresh water tank 6
It is divided by two partition plates 5a and 5b so that a and 6b are arranged. Pipes are connected to the bottom surfaces of the two fresh water tanks 6a and 6b so that the water levels of the two fresh water tanks 6a and 6b are always kept equal. The lid 11 provided with the sealing packing 10 corresponding to the opening 7a of the waste water tank 7 arranged in the center of the water tank is covered to maintain the suction effect of the waste water tank 7.

[0007]

As described above, according to the present invention, on the carriage of the floor cleaning robot, the fresh water tank is divided into two, and the two tanks are arranged on the left and right with the dirty water tank interposed therebetween. By connecting with a pipe, the water levels of the two fresh water tanks become the same, the balance of the load applied to the dolly can be eliminated, and the floor cleaning robot can maintain straightness and maintain stable running.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of a water tank of a floor cleaning robot according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an outline of a water tank of a conventional floor cleaning robot.

FIG. 3 is a side view showing an outline of a conventional floor cleaning robot.

[Explanation of symbols]

 1 dolly 2 drive wheel 3 front driven wheel 4 rear driven wheel 5 partition plate 6 fresh water tank 7 dirty water tank 8 brush 9 suction device 10 sealing packing

Claims (1)

[Claims] 1. A pair of left and right drive wheels is provided at the center of the lower surface of the bogie, and a water tank comprising a fresh water tank and a waste water tank is mounted on the bogie.
In a self-propelled floor cleaning robot in which a sprinkling pipe is led out from the fresh water tank to the vicinity of a rotating brush provided on the lower surface of the carriage, and a suction device for sucking dirty water on the floor is connected to the dirty water tank, in the water tank. A floor cleaning robot that is divided into three parts, the center is a sewage tank, the left and right are fresh water tanks, and the same fresh water tanks are connected by pipes.