Patent ID: 8453990

Claim:
A lifting-adjusting assembly for a shaft comprising: an outer device being adapted to mount around an external surface of the shaft and having a base having a central hole formed through the base to mount around the external surface of the shaft; a top surface; and a sidewall; and a mounting casing mounted securely around the base and having a lower end; an upper end; an external surface; a chamber formed in the mounting casing to mount around the external surface of the shaft and the sidewall of the base; an opening formed through the upper end of the mounting casing and communicating with the chamber to enable the shaft to extend out of the upper end of the mounting casing; and a cone surface annularly formed in the mounting casing adjacent to the opening; an inner device movably connected to the outer device and having a moving mount being hollow, movably mounted in the outer device between the base and the mounting casing and having a bottom end; a top end; an external surface; a mounting chamber formed through the moving mount to mount around the external surface of the shaft; a pressing segment formed on the top end of the moving mount and extending out of the upper end of the mounting casing via the opening; and multiple positioning holes radially formed through the external surface of the moving mount at intervals, communicating with the mounting chamber and facing to the cone surface of the mounting casing; and at least one spring mounted in the chamber between the base and the moving mount to push the pressing segment of the moving mount extending out of the opening of the mounting casing and to enable the positioning holes facing to the cone surface of the mounting casing; and multiple positioning elements respectively mounted in the positioning holes of the moving mount and abutting with the cone surface of the mounting casing to abut with the external surface of the shaft to hold the lifting-adjusting assembly on the shaft.