Electric spindle and machine tool

• Main Authors: ZHANG WEIJIANG, HUANG SUNKE, CHENG ZHENTAO, WU XI, ZHANG HANQIAN, TANG XIUQING
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2021
• Subjects: BORING; 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; TURNING

The invention discloses an electric spindle and a machine tool. The electric spindle comprises a machine body assembly, a shaft core assembly and a push rod, wherein the machine body assembly is provided with an air inlet and a stator; the shaft core assembly is supported on the machine body assembly through an upper bearing assembly and a lower bearing assembly, and the shaft core assembly comprises a shaft core, a rotor, a pull rod assembly and a chuck; the push rod extends into a shaft core inner hole from the upper end of the shaft core; and the upper bearing assembly comprises an upper bearing seat, an upper bearing and a bearing pre-tightening part, a closed inner cavity is defined in the upper bearing seat, the shaft core inner hole communicates with the inner cavity, the upper bearing and the bearing pre-tightening part are arranged in the inner cavity, the bearing pre-tightening part is supported between the upper bearing and the upper bearing seat, the upper bearing seat is provided with a piston ca