Locking device of machining machine tool for standard component

The invention relates to a locking device of a machining machine tool for a standard component. The locking device is mounted on a workbench and comprises a moving shaft sleeve, a moving handle, a moving support and a clamping sleeve. The moving shaft sleeve is coaxially mounted on the moving support, the moving support is hinged to a moving sleeve in an arc mode through a spherical pair, and the moving shaft sleeve achieves the axial displacement of the moving shaft sleeve through the moving handle which is fixedly arranged in the radial direction. The moving shaft sleeve is coaxially meshed with the clamping sleeve which is provided with three jaws inside a spindle, the conical surface of the clamping sleeve with the three jaws is matched with the conical surface formed by the end face of the moving shaft sleeve, and stretchy holes are formed in the clamping sleeve with the three jaws. According to the locking device of the machining machine tool for the standard component, a locking positioning device of w