Cleaning assembly and cleaning robot

Abstract

A cleaning assembly configured for mounting on a main body of a cleaning robot includes a cleaning component, a first connecting rod with one end swingingly connected to the cleaning component and the other end swingingly connected to the main body, and a second connecting rod with one end swingingly connected to the cleaning component and the other end swingingly connected to the main body. The first connecting rod, the cleaning component, the second connecting rod, and the main body cooperatively form a link mechanism to lift or lower the cleaning member by a reciprocating movement of the link mechanism, and a driving device is configured to drive the link mechanism to perform the reciprocating movement. The adaptability of the cleaning robot using the cleaning assembly is improved since the cleaning component can be lifted or lowered.

What is claimed is: 
     
         1 . A cleaning assembly, configured for mounting on a main body of a cleaning robot, the cleaning assembly comprising:
 a cleaning component;   a first connecting rod with one end swingingly connected to the cleaning component and the other end swingingly connected to the main body, and a second connecting rod with one end swingingly connected to the cleaning component and the other end swingingly connected to the main body, allowing the first connecting rod, the cleaning component, the second connecting rod, and the main body to form a link mechanism to lift or lower the cleaning component by a reciprocating movement of the link mechanism; and   a driving device, configured to drive the link mechanism to perform the reciprocating movement.   
     
     
         2 . The cleaning assembly as claimed in  claim 1 , wherein the cleaning component comprises a mounting base connected with the first connecting rod and the second connecting rod, and a cleaning member fixedly or rotatably installed on the mounting base. 
     
     
         3 . The cleaning assembly as claimed in  claim 1 , wherein the link mechanism comprises a four-bar linkage of a rhomboid. 
     
     
         4 . The cleaning assembly as claimed in  claim 1 , wherein a connection position between the cleaning component and the first connecting rod and a connection position between the cleaning component and the second connecting rod face to each other in a vertical direction, and a connection position between the main body and the first connecting rod and a connection position between the main body and the second connecting rod face to each other in the vertical direction. 
     
     
         5 . The cleaning assembly as claimed in  claim 1 , further comprising a torque applying device; wherein,
 when the cleaning component encounters an obstacle, the cleaning component is pushed upward to make the link mechanism transform, and transformation of the link mechanism allows the torque applying device to be pushed against by the link mechanism to store elastic potential energy; and   the cleaning component falls back down under a release of the elastic potential energy of the torque applying device when the cleaning component is separated from the obstacle.   
     
     
         6 . The cleaning assembly as claimed in  claim 5 , wherein the driving device comprises a transmission structure configured to drive the first connecting rod to rotate in a first direction to allow the cleaning component to be lifted upward by the link mechanism;
 the torque applying device is arranged on the transmission structure and configured to be driven by the transmission structure to push the first connecting rod to rotate in a second direction to allow the cleaning component to fall back down.   
     
     
         7 . The cleaning assembly as claimed in  claim 6 , wherein the transmission structure comprises a rotating body on which the torque applying device is arranged;
 the first connecting rod is rotated in the first direction to lift the cleaning component upward when the rotating body is rotated in a third direction; and   the first connecting rod is pushed by the torque applying device to rotate in the second direction to allow the cleaning component to fall back down when the rotating body is rotated in a fourth direction.   
     
     
         8 . The cleaning assembly as claimed in  claim 7 , wherein the rotating body is provided with a shaft, and the torque applying device comprises a torsion spring comprising:
 a torsion spring body sleeved on the shaft, and   a first torsion arm connected to the torsion spring body and engaged with the rotating body; and   a second torsion arm connected to the torsion spring body and configured to act on the first connecting rod;   the second torsion arm is driven to press the first connecting rod down to allow the first connecting rod to rotate in the second direction when the rotating body is rotated in the fourth direction; and   the second torsion arm is pushed by the first connecting rod due to transformation of the link mechanism to allow the torsion spring to store elastic potential energy when the cleaning component encounters an obstacle.   
     
     
         9 . The cleaning assembly as claimed in  claim 7 , wherein the rotating body is provided with a protrusion configured to push the first connecting rod to rotate in the first direction when the rotating body is rotated in the third direction. 
     
     
         10 . The cleaning assembly as claimed in  claim 1 , wherein the driving device comprises a rotating body fixedly connected to the first connecting rod. 
     
     
         11 . The cleaning assembly as claimed in  claim 10 , wherein the cleaning assembly comprises two cleaning components which are arranged side by side, and each of the two cleaning components are connected to the main body by the first connecting rod and the second connecting rod;
 the driving device comprises a driving motor, a transmission mechanism, a screw rod, a sliding seat, and two gears served as the rotating body; the driving motor is connected to the screw rod through the transmission mechanism to drive the screw rod to rotate, the sliding seat is in threaded connection with the screw rod to be lifted or lowered by the screw rod, two gear racks are arranged on opposite sides of the sliding seat and each gear rack is engaged with a gear, and each of the two gears is configured to drive a corresponding first connecting rod.   
     
     
         12 . The cleaning assembly as claimed in  claim 10 , wherein the cleaning assembly comprises two cleaning components which are arranged side by side, and each of the two cleaning components is connected to the main body by the first connecting rod and the second connecting rod;
 the driving device comprises a driving motor, a transmission mechanism, a worm, and two worm gears served as the rotating body, the driving motor is connected to the worm through the transmission mechanism to drive the worm to rotate, and each of the two worm gears is meshed on a side of opposite two sides of the worm and configured to drive a corresponding first connecting rod.   
     
     
         13 . A cleaning robot, comprising a main body and a cleaning assembly, wherein the cleaning assembly comprises:
 a cleaning component;   a first connecting rod with one end swingingly connected to the cleaning component and the other end swingingly connected to the main body, and a second connecting rod with one end swingingly connected to the cleaning component and the other end swingingly connected to the main body, allowing the first connecting rod, the cleaning component, the second connecting rod, and the main body to form a link mechanism to lift or lower the cleaning component by a reciprocating movement of the link mechanism; and   a driving device, configured to drive the link mechanism to perform the reciprocating movement.   
     
     
         14 . The cleaning robot as claimed in  claim 13 , wherein a connection position between the cleaning component and the first connecting rod and a connection position between the cleaning component and the second connecting rod face to each other in a vertical direction, and a connection position between the main body and the first connecting rod and a connection position between the main body and the second connecting rod face to each other in the vertical direction. 
     
     
         15 . The cleaning robot as claimed in  claim 13 , wherein the cleaning assembly further comprises a torque applying device;
 when the cleaning component encounters an obstacle, the cleaning component is pushed upward to make the link mechanism transform, and transformation of the link mechanism allows the torque applying device to be pushed against by the link mechanism to store elastic potential energy; and   the cleaning component falls back down under a release of the elastic potential energy of the torque applying device when the cleaning component is separated from the obstacle.   
     
     
         16 . The cleaning robot as claimed in  claim 15 , wherein the driving device comprises a transmission structure configured to drive the first connecting rod to rotate in a first direction to allow the cleaning component to be lifted upward by the link mechanism;
 the torque applying device is arranged on the transmission structure and configured to be driven by the transmission structure to push the first connecting rod to rotate in a second direction to allow the cleaning component to fall back down.   
     
     
         17 . The cleaning robot as claimed in  claim 16 , wherein the transmission structure comprises a rotating body on which the torque applying device is arranged;
 the first connecting rod is rotated in the first direction to lift the cleaning component upward when the rotating body is rotated in a third direction; and   the first connecting rod is pushed by the torque applying device to rotate in the second direction to allow the cleaning component to fall back down when the rotating body is rotated in a fourth direction.   
     
     
         18 . The cleaning robot as claimed in  claim 17 , wherein the rotating body is provided with a shaft, and the torque applying device comprises a torsion spring comprising:
 a torsion spring body sleeved on the shaft, and   a first torsion am connected to the torsion spring body and engaged with the rotating body; and   a second torsion arm connected to the torsion spring body and configured to act on the first connecting rod;   the second torsion arm is driven to press the first connecting rod down to allow the first connecting rod to rotate in the second direction when the rotating body is rotated in the fourth direction; and   the second torsion arm is pushed by the first connecting rod due to transformation of the link mechanism to allow the torsion spring to store elastic potential energy when the cleaning component encounters an obstacle.   
     
     
         19 . The cleaning robot as claimed in  claim 17 , wherein the cleaning assembly comprises two cleaning components which are arranged side by side, and each of the two cleaning components is connected to the main body by the first connecting rod and the second connecting rod;
 the driving device comprises a driving motor, a transmission mechanism, a screw rod, a sliding seat, and two gears served as the rotating body; the driving motor is connected to the screw rod through the transmission mechanism to drive the screw rod to rotate, the sliding seat is in threaded connection with the screw rod to be lifted or lowered by the screw rod, two gear racks are arranged on opposite sides of the sliding seat and each gear rack is engaged with the a gear, and each of the two gears is configured to drive a corresponding first connecting rod.   
     
     
         20 . The cleaning robot as claimed in  claim 17 , wherein the cleaning assembly, comprises two cleaning components which are arranged side by side, and each of the two cleaning components is connected to the main body by the first connecting rod and the second connecting rod;
 the driving device comprises a driving motor, a transmission mechanism, a worm, and two worm gears served as the rotating body, the driving motor is connected to the worm through the transmission mechanism to drive the worm to rotate, and each of the two worm gears is meshed on a side of opposite two sides of the worm and configured to drive a corresponding first connecting rod.