Dust-sucking arm of an air cleaning machine

Abstract

A dust-sucking arm of an air cleaning machine includes two flexible ducts respectively connected between two rigid ducts and between one rigid duct and the wind-guiding opening. Three pivotal bases are assembled at the outer sides of the rigid ducts and the flexible ducts. Two parallel connecting rod units are respectively and pivotally assembled between two adjacent pivotal bases. One connecting rod of each parallel connecting rod unit is fixed with the relative rigid duct to actuate the rigid duct to move. Two pressure cylinders are respectively and pivotally installed between a connecting duct and the relative pivotal base, supporting the connecting rod unit. Two locking members are respectively installed between one connecting rod and the pivotal base, locking the connecting rod to stop the connecting rod unit.

1 . A dust-sucking arm of an air cleaning machine comprising: 
 Two rigid ducts;    Two flexible ducts, one of said two flexible ducts connected with the wind-guiding opening of said air cleaning machine and one said rigid duct, the other said flexible duct positioned between said two rigid ducts;    Three pivotal bases, a first said pivotal base fixed at the location of said wind sucking opening of said air cleaning machine, a second said pivotal base positioned between said two rigid ducts, a third said pivotal base assembled at the outer end of the rear said rigid duct:    Two parallel connecting rod units respectively having two parallel connecting rods, said two parallel connecting rod units respectively connected with adjacent said two pivotal bases, a preset connecting rod of each said parallel connecting rod unit fixedly connected with a relative said rigid duct, said rigid duct able to be synchronously moved bias together with said parallel connecting rod unit:    Two pressure cylinders respectively having one end pivotally connected with said first pivotal base and said second pivotal base, said two pressure cylinders respectively having the other end pivotally connected with a preset connecting rod of relative said connecting rod unit, said pressure cylinder helping to support said parallel connecting rod unit: and    Two locking members respectively fastened at the pivotal portion of any said connecting rod of said two parallel connecting rod units, said locking member able to lock and position said connecting rod on relative said pivotal base, the pivotal portion of said connecting rod impossible to be turned pivotally after being locked by said locking member.    
     
     
         2 . The dust-sucking arm of an air cleaning machine as claimed in  claim 1 , wherein a rotary base is assembled at the location of said wind-guiding opening of said air cleaning machine for said first pivotal base and relative said flexible duct to be fixed thereon.  
     
     
         3 . The dust-sucking arm of an air cleaning machine as claimed in  claim 2 , wherein said rotary base is composed of a stationary shaft base and a rotatable base, said stationary shaft base secured at the location of said wind-guiding opening of said air cleaning machine, said stationary shaft base formed with a shaft tube in the center, said rotatable base fitted on said shaft tube of said stationary shaft base, said rotatable base having its topside formed with a connecting tube, said front flexible duct firmly fitted on said connecting tube of said rotatable base.  
     
     
         4 . The dust-sucking arm of an air cleaning machine as claimed in  claim 1 , wherein said rear rigid duct has its outer end connected with a flexible duct having its outer end connected with a wind-guiding shade.  
     
     
         5 . The dust-sucking arm of an air cleaning machine as claimed in  claim 4 , wherein a joint member is fitted between said rear rigid duct and said wind-guiding shade, said joint member composed of a connecting ring to be movably fitted on the outer side of said rear flexible duct and four pivotal connecting strips pivotally and equidistantly provided on said connecting ring, symmetrical said two pivotal connecting strips at one side of said connecting ring having their ends firmly connected with said wind-guiding shade, the other two of symmetrical said pivotal connecting strips at the other side of said connecting ring having their ends firmly connected with said rear rigid duct, said wind-guiding shade able to be actuated to turn in any direction by means of said joint member.