Abstract: A machine tool transmission system includes a driving assembly, a driven gear and at least one transmission gear, at least two positioning gears and at least two retaining gears. The driving assembly includes an input unit and a driving gear driven by the input unit. The transmission gear, positioning gears and retaining gears have respectively a plurality of transmission teeth, positioning teeth and retaining teeth that include respectively a front end tooth and a rear end tooth connecting to the front end tooth and formed at a thickness greater than that of the front end tooth.

Abstract: A machine tool transmission system includes a driving assembly, a driven gear and at least one transmission gear, at least two positioning gears and at least two retaining gears. The driving assembly includes an input unit and a driving gear driven by the input unit. The transmission gear, positioning gears and retaining gears have respectively a plurality of transmission teeth, positioning teeth and retaining teeth that include respectively a front end tooth and a rear end tooth connecting to the front end tooth and formed at a thickness greater than that of the front end tooth.

Abstract: A touch trigger probe is used to determine whether contacts with a workpiece and contains a sleeve, a sensing segment and a transmitting segment. The sleeve extends along an axial direction and includes a first chamber and a second chamber communicating with the first chamber. The sensing segment includes a sensing end extending out of the sleeve and a driving end far from the sensing end. The transmitting segment is pushed by the driving end to move in the second chamber to a triggering position from an original position relative to the sleeve, and includes a driven end protruded axially and capable of contacting with the driving end. Thereby, as the touch trigger probe of the invention has a swing sensing travel for lateral contact and an elevation sensing travel for longitudinal contact, excessive sensing elements can be avoided to lower production costs and obtain positioning precision.

Abstract: A grinder equipped with a curved motion mechanism to process a working piece to form a double-envelope structure includes a grinding wheel, a driving shaft, a track bracket and a holder. The grinding wheel includes a grinding edge which has a grinding zone in contact with the working piece. The driving shaft drives the grinding wheel spinning. The track bracket holds the driving shaft and is movable in a curved motion against the holder. The driving shaft is coupled with the track bracket via a middle section and driven by the curved motion to tilt against the holder and oscillate about the grinding zone of the grinding wheel as an oscillation center. Thus the invention can process the working piece at varying angles to form a worm with the double-envelope structure and improve process precision.