Application No.: 200920167721

Application Time: July 30, 2009

Announcement Time: May 26, 2010

Patentee: Qingdao New Motivity Woodworking Machinery Co.,Ltd Zhu Yaguang Liu Hua

The utility model patent relates to a kind of air control pendulous device of sander, including the air control assembly on the stringer of frame and mechanical pendulous assembly. The above air control assembly consists of controller and cylinder controlled by controller. And there is an expansion link on the cylinder. The mechanical pendulous assembly contains pendulous disc, oscillating rod drove by pendulous disc, and pendulous pedestal connecting with oscillating rod. The pendulous disc connects with expansion link pin. The oscillating rod consists of rolling sole bar and eccentric head linking with pendulous pedestal. It can reduce maximum negative effect of dust caused by sanding on the pendulous control during the working through air control parts controlling abrasive belt swing. The structure is reliable and durable. What’s more, it can control the range of eccentricity swing through the eccentricity adjusting rod, which improved greatly adjusting precision of abrasive belt swing.