| 摘要 |
A suction brush assembly capable of automatic height adjustment is provided to prevent damage of carpet due to a rotation brush by automatically controlling the distance between the rotation brush and the surface to be cleaned according to the condition or kind of the surface to be cleaned. A suction brush assembly capable of automatic height adjustment comprises a main body(10) of a suction body, and an up/down control unit. The main body, whose rear part is connected to a main body, has a rotation brush for peeling the surface to be cleaned. The up/down control unit controls the height of the main body to change the interval between the surface to be cleaned and the rotation brush according to the condition of the surface to be cleaned, and detects the condition of the surface to be cleaned continuously to prevent damage of the surface to be cleaned by the rotation brush. The up/down control unit consists of a current detecting sensor, a height driving part(30), and a control part. The height driving part includes a second motor(31), a wheel shaft(38), a power transmission part. The wheel shaft subject to rotation force from the second motor through the power transmission part reciprocates the main body of the suction brush around a pair of main wheel.
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