Plug-in machine plug-in pressure protection device

The invention relates to a plug-in machine plug-in pressure protection device. The device comprises a plug-in shaft and a clamping jaw installed at a lower end of the plug-in shaft. The plug-in shaftis installed on a lifting seat and has characteristics of floating and rotating relative to the lifting seat. An upper end of the plug-in shaft is provided with a pressure sensor, and the pressure sensor feeds back a pressure signal to a control portion of a plug-in machine so as to control rising and lowering of the lifting seat. When a plug-in is blocked by an obstacle, a buffer spring of the clamping jaw is contracted upwardly to generate a spring resistance. The spring resistance is transmitted to the pressure sensor through the plug-in shaft, and the pressure sensor feeds back the pressure signal to the control portion of the plug-in machine so as to generate a pressure value on a device display. When the lifting seat continues to drive the plug-in shaft to go down, the pressure valueis gradually increased. W