Tool changing arm structure and numerical control machine tool applying same

• Main Authors: HUANG WEICAI, TANG MINGDI, TANG YISHENG, CAO QUAN
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• Subjects: COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING

The tool changing arm structure comprises a tool changing arm body, a thumb assembly, a sealing assembly and an elastic piece, a mounting hole is formed in the end of the tool changing arm body, the thumb assembly is sleeved with the elastic piece, and then the elastic piece and the thumb assembly are jointly inserted into the mounting hole; the sealing assembly sleeves the thumb assembly, and an annular gap is formed between the sealing assembly and the thumb assembly; the sealing assembly comprises a sealing body, a rectangular ring groove is formed in the outer surface of the sealing body, and the rectangular ring groove can introduce air into the annular gap; the rectangular ring groove is communicated with the air inlet, compressed air is introduced into the air inlet, and the compressed air is guided to the whole circumference under the action of the rectangular ring groove and then flows into the annular gap to form an annular air film, so that dust and scrap iron are blown towards the direction far aw