Roller brush assembly and cleaning robot

Abstract

A roller brush assembly includes a roller brush device, a lifting drive motor, and a lifting transmission assembly. The roller brush device includes a roller brush housing and a roller brush rotatably connected in the roller brush housing, and one side of the roller brush housing is provided with a swing arm. The lifting transmission assembly is connected to the lifting drive motor and driven by the lifting drive motor to drive the swing arm to swing, thereby lifting the roller brush device. Thus, the roller brush device can be lifted and held in a lifted position, thereby improving the adaptability of a cleaning robot having the roller brush assembly.

What is claimed is: 
     
         1 . A roller brush assembly, comprising:
 a roller brush device, comprising a roller brush housing and a roller brush rotatably connected in the roller brush housing, one side of the roller brush housing being provided with a swing arm;   a lifting drive motor; and   a lifting transmission assembly, connected to the lifting drive motor and driven by the lifting drive motor to drive the swing arm to swing, allowing the roller brush device to be lifted.   
     
     
         2 . The roller brush assembly according to  claim 1 , wherein the roller brush device is capable of backswing downward by its own gravity. 
     
     
         3 . The roller brush assembly according to  claim 1 , wherein the swing arm is configured to swing upward to lift the roller brush device when the roller brush housing encounters an obstacle, and the roller brush device is capable of backswing downward by its own gravity, realizing a self-adaptive floating of the roller brush device. 
     
     
         4 . The roller brush assembly according to  claim 1 , wherein the lifting transmission assembly comprises:
 a moving member cooperating with the swing arm and configured to drive the swing arm to drive the roller brush device to swing upward; and   a lifting transmission mechanism connected to the lifting drive motor and the moving member to drive the moving member to move.   
     
     
         5 . The roller brush assembly according to  claim 4 , wherein the moving member is movable up and down under driving of the lifting drive motor, the moving member comprises a first moving part cooperating with the swing arm, and upward movement of the first moving part allows the swing arm to drive the roller brush device to swing upward. 
     
     
         6 . The roller brush assembly according to  claim 5 , wherein a positioning sensor is provided on the moving member to sense whether the moving member is lifted up in place. 
     
     
         7 . The roller brush assembly according to  claim 5 , wherein,
 the lifting drive motor comprises an output shaft vertically arranged and extending upward,   the lifting transmission mechanism comprises:
 a screw rod in a thread connection with the moving member; and 
 a gear set comprising a driving gear fixedly connected to the output shaft and a driven gear fixedly connected to the screw rod. 
   
     
     
         8 . The roller brush assembly according to  claim 4 , wherein the swing arm comprises:
 a connecting arm disposed on one side of the roller brush housing; and   a contact arm having a first end connected to the connecting arm and a second end defined with a contact portion;   wherein the moving member moves to drive the contact portion towards one side away from the roller brush device, driving the roller brush device to swing upward.   
     
     
         9 . The roller brush assembly according to  claim 8 , further comprising a mounting housing, wherein the moving member is mounted on the mounting housing and movable up and down, a swing groove is defined and penetrated downwardly on a side surface of the mounting housing, the moving member comprises a first moving part extended into the swing groove, the contact arm is swing arranged in the swing groove, the upward movement of the first moving part pushes the contact arm to swing to a side away from the roller brush device, allowing the roller brush device to be lifted, and an inner wall of the swing groove away from the roller brush device is configured to limit a swing range of the contact arm. 
     
     
         10 . The roller brush assembly according to  claim 9 , wherein the connecting arm is located under and close to the mounting housing, and the mounting housing is configured to limit an upward swing range of the connecting arm. 
     
     
         11 . The roller brush assembly according to  claim 10 , wherein a recess is formed at a position of the roller brush housing adjacent to the connecting arm, and the lifting drive motor is arranged correspondingly to the recess. 
     
     
         12 . The roller brush assembly according to  claim 4 , wherein,
 the moving member is configured to be movable forward and backward under driving of the lifting drive motor and the lifting transmission mechanism;   the lifting transmission mechanism comprises:
 a screw rod extending forward and backward, the moving member being slidably sleeved on the screw rod; and 
 a slider in a thread connection to the screw rod, an elastic member is disposed between the moving member and the slider, the slider being slid toward the moving member under driving of the lifting drive motor to make the elastic member in a compressed state push the moving member, thereby pushing the swing arm towards one side away from the roller brush device. 
   
     
     
         13 . The roller brush assembly according to  claim 12 , wherein the swing arm comprises a contact portion pushed by the moving member, and the contact portion is located at one side of the moving member away from the slider; the swing arm is pushed by the moving member to swing to contact a contact wall when the lifting drive motor reaches a preset stroke. 
     
     
         14 . The roller brush assembly according to  claim 12 , wherein the swing arm is formed with a gap for allowing the screw rod to pass therefrom. 
     
     
         15 . The roller brush assembly according to  claim 12 , wherein a limit sliding slot extended forward and backward is defined in the moving member, a limit protrusion is protruded from the slider and toward the moving member, and the limit protrusion is slidably engaged with the limit sliding slot. 
     
     
         16 . The roller brush assembly according to  claim 1 , wherein the swing arm is configured to be pivotally connected to a fixing structure inside a cleaning robot. 
     
     
         17 . The roller brush assembly according to  claim 1 , wherein the roller brush housing further comprises a pivoting arm, the pivoting arm and the swing arm are located on a same side of the roller brush housing and spaced apart along a length direction of the roller brush housing, a free end of the pivoting arm is configured to be pivotally connected to a fixing structure inside a cleaning robot, and the roller brush device is capable of swinging up and down by the pivoting arm and the swing arm. 
     
     
         18 . A cleaning robot, comprising a roller brush assembly which comprises a roller brush device, a lifting drive motor, and a lifting transmission assembly, wherein the roller brush device comprises a roller brush housing and a roller brush rotatably connected in the roller brush housing, one side of the roller brush housing is provided with a swing arm, and the lifting transmission assembly is connected to the lifting drive motor and driven by the lifting drive motor to drive the swing arm to swing to allow the roller brush device to be lifted. 
     
     
         19 . The cleaning robot according to  claim 18 , wherein the swing arm is configured to swing upward to lift the roller brush device when the roller brush housing encounters an obstacle, and the roller brush device is capable of backswing downward by its own gravity, realizing a self-adaptive floating of the roller brush device. 
     
     
         20 . The cleaning robot according to  claim 18 , wherein the lifting transmission assembly comprises:
 a moving member cooperating with the swing arm and configured to drive the swing arm to drive the roller brush device to swing upward; and   a lifting transmission mechanism connected to the lifting drive motor and the moving member to drive the moving member to move.