Paradex Model PU225DS, PU250DS, PU320DS, PU400DS

Product Specifications:

Mechanism & Stucture:

TAN TZU index Drives are so designed that the globoidal cam installed in the input shaft mates with the turret fixed to the output shaft

The cam follower which is radially embedded in the circumferential surface of the turret comes into linear contact with the tapered rib of the cam to their respective wall surfaces.

When the input shaft is rotated, the cam follower rotates the turret following a given displacement curve while rolling along the wall surface of the rib. In the area where the rib is parallel with the end surface of the cam, that is , in the stationary range, the follower turns on its axis, but the turret itself does not rotate. The tapered rib always comes into contact with two or three cam followers so that the revolution of the input shaft may be evenly transmitted of the output shaft.

If there is backlash between the cam surface of the tapered rib and cam follower may sometimes damage. This backlash can be completely removed by rotating the eccentric flange supporting the input shaft and shortening the distance between the input shaft and the output shaft. In other words, the backlash can be eliminated by adjusting the distance between the shafts. Also the rigidity of the indexing drive can be enhanced by adjusting the preload appropriately within the elastic region of the cam follower and cam.

Its structure and function are the most outstanding features of this combination of globoidal cam and cam follower, making it capable of high speed operation.

Features:

1. Simple mechanism: Composed of only a cam and turret; no unnecessary parts, while providing any intermittent motion needed.

2. Positive driving mechanism: Even at the moment of indexing or dwell, the follower is secured in place within the prescribed position, thereby eliminating the need for any locking elements.

3. Smooth motion: As the turret is designed to rotate continuously in any position (regardless of angle, speed and/or acceleration) the driving motion is smooth and free of vibration and noise.

4.High indexing accuracy: TAN TZU’s specially designed cam follower within the index drive ensures heavy load capability while maintaining high indexing accuracy and high torque. The indexing accuracy of the standard models is ±30 seconds. However, models providing higher indexing accuracy are available upon request.

5. High speed performance: Backlash is completely eliminated by applying a preload to the tapered-rib of the precision machined cam and the cam follower, resulting in reliable high speed operation. Fully controlled acceleration minimizes shock due to load or vibration.

6. A variety of models available: Our standard models available vary accordingly: • Eleven types for the number of stops • Five types for indexing angles • Seventeen types for housings

7. Motion curves: Modified trapezoid curve, modified sine curve, modified constant velocity curve and RBS curve are available corresponding to required applications.

8. Unique installation: Unlike other indexing mechanisms, TAN TZU index Drives are compact and thus can be installed at various angles.

9. Maintenance-free construction: Aside from oil replacement, no maintenance is required

Video real Tantzu index