Intermediate drive dense ball shafting mechanism

Abstract

The invention belongs to the field of numerical control precision measuring equipment, and relates to an intermediate drive type dense ball shafting mechanism. The intermediate drive type compact ball shafting mechanism includes four sets of axial thrust compact ball shafting systems and two sets of radial compact ball shafting systems, transmission shafts and locking components. The four sets of axial thrust dense bead shafting are arranged on both sides of the middle step shaft of the transmission shaft, the radial dense bead shafting is respectively arranged in the middle of the two sets of axial thrust dense bead shafting, and the axial thrust dense bead shaft The end face of the bearing retaining ring adjacent to the radial dense ball shafting is coplanar with the end face of the radial dense ball shafting sleeve and the cage. The transmission shaft is threadedly connected with the rotating part through a screw, and the positional relationship between the cylindrical pin and the rotating part is kept relatively constant; the bushing is connected with the fixed part through a screw thread, and the present invention ensures the largest rigidity / inertia ratio and strong anti-overturn ability , High rotation accuracy, uniform force, positioning accuracy up to 1"; reduced processing difficulty, easy to ensure the size and geometric accuracy of the ball working raceway.

Description

technical field [0001] The invention belongs to the field of numerical control precision measuring equipment, and relates to an intermediate drive type dense ball shafting mechanism. Background technique [0002] At present, the articulated arm measuring instruments produced by domestic and foreign manufacturers generally use ordinary ball bearings as the steering tools between the joints, and all of them adopt asymmetric structure layout. Ordinary ball bearings have the limitation of low repeatability of operation. When the working load increases or there is vibration, the pressure on a single ball will increase, making the balls easily crushed; the shaft system with asymmetric structure will make the bearing less stressed. Uniform, the axis of rotation of the shafting is not fixed, the wear of the bearing increases, and the accuracy of the shafting is difficult to guarantee. Therefore, the common shafting structure arranged asymmetrically will cause a large reading error ...

AI Technical Summary

Problems solved by technology

Some existing dense bead shafting designs are top drive types with relatively simple structure, which are generally used for the transition of optical microscope precision rotation drive, and cannot meet the special requirements of intermediate drive mechanical equipment

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