Air duct girdling device

• Main Authors: GU PENG, FENG QINGXI, SHI YINGHUA, LIU YANRU, ZHANG SHUAI, KONG YAXIA, XIE HUADONG, ZHANG CHENGTAO, LIU DEYONG, CHEN LEI, FU WEI, YANG XUWEI, LI JILIANG, HE HONGLEI, ZHU QING, LI PING, LIU CHANG, XUE QI, LIU QU, SONG HAIZHOU, CHEN JUN
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: BROACHING; FILING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PLANING; SAWING; SCRAPING; SHEARING; SLOTTING; TRANSPORTING

The utility model relates to an air duct girdling device. In order to fill the blank in the prior art, the air duct girdling device comprises a cutting knife, a base and a lifting arm, one end of the lifting arm is connected with a guide column, a guide hole is formed in the base, the lower end of the guide column is inserted into the guide hole, the guide column outside the guide hole is further sleeved with a spiral spring, and the two ends of the spiral spring directly or indirectly abut against the base and the lifting arm respectively. The cutting knife is fixed below the other end of the lifting arm, an inserting hole for the cutting knife to be inserted is formed in the base, a longitudinal long groove hole is further formed in the portion, between the inserting hole and the guide hole, of the base, the cross section of the longitudinal long groove hole is in an inverted-T shape, a pin column is arranged in the longitudinal long groove hole, and the lower end of the pin column is connected with a protr