Zero-point positioning disk structure improvement

Abstract

This invention relates to an improved zero-point positioning disc structure for enhancing positioning accuracy and operability. It comprises: a disc body with an internal accommodating space, and a first reference edge and a second reference edge perpendicular to each other at a non-through-hole location; two crescent-shaped inserts installed within the accommodating space of the disc body, each having two opposing threaded holes with different thread directions; and a transmission screw with two high-lead external threads of different thread directions on a shaft. The transmission screw extends through the through-hole of the disc body and connects its two external threads to the corresponding threaded holes of the two crescent-shaped inserts. This allows the high-lead transmission screw to drive the two crescent-shaped inserts to quickly move closer or further apart to engage the positioning pins of a vise holding a workpiece.

Claims

1. An improved zero-point positioning disc structure, comprising: a disc body having an accommodating space therein, and a plurality of positioning holes on the top surface of the disc body, the plurality of positioning holes being interconnected and penetrating the accommodating space; a through hole on the side of the disc body, the through hole also being interconnected with the accommodating space; wherein a first reference edge and a second reference edge perpendicular to each other are provided around the area where the through hole is not provided; two crescent-shaped inserts being installed opposite each other in the accommodating space of the disc body, the outer edges of the two crescent-shaped inserts being laterally inserted into the plurality of positioning holes, and the two crescent-shaped inserts having two connecting screw holes opposite each other and having different thread directions; and a transmission screw having two external thread portions with different thread directions on a rod body, and the transmission screw extending through the through hole of the disc body, so as to drive the two crescent-shaped inserts to move closer or further apart by operating the transmission screw.

2. The zero-point positioning disk structure improvement as described in claim 1, wherein the plurality of positioning holes are set to four and arranged in a matrix, and the bottom of the disk body is provided with a plurality of fixing holes; the two external threaded portions of the transmission screw are connected to the two connecting screw holes of the corresponding two crescent-shaped inserts; and the two external threaded portions are both set as double or triple threads with high lead.

3. The improved zero-point positioning disk structure as described in claim 2, wherein the bottom end face of the disk body is provided with a bottom hole and the bottom hole communicates with the receiving space, and the disk body further includes a cover body disposed in the bottom hole.

4. An improved zero-point positioning disc structure as described in claim 3, wherein the cover is fitted with a C-shaped buckle to be attached to the bottom hole.

5. The zero-point positioning disk structure improvement as described in claim 2, wherein the cross-section of the outer edge of the two crescent-shaped inserts is a pointed cone shape, so as to facilitate the outer edge to be embedded in the annular groove of the several positioning pins provided by the vise.

6. The zero-point positioning disk structure improvement as described in claim 2, wherein the through hole of the disk body is set as a fish-eye hole, and the outer end of the transmission screw is set as a head to be recessed into the fish-eye hole-shaped through hole, and the head is provided with an internal hexagonal groove to facilitate the insertion of a hexagonal wrench.

7. The zero-point positioning disk structure improvement as described in claim 2, wherein the transmission screw is configured as a two-piece unit, and the transmission screw is connected into one piece through a polygonal connecting rod to facilitate driving the two crescent-shaped inserts.

8. The improved zero-point positioning disk structure as described in claim 7, wherein the two-piece structure has two polygonal holes at opposite ends to provide for fitting the polygonal connecting rod, and two fixing screw holes communicating with the two polygonal holes to provide two screws for fixing and positioning the polygonal connecting rod.

9. The improved zero-point positioning disk structure as described in claim 2, wherein two springs are provided between the two crescent-shaped inserts, and each of the two crescent-shaped inserts is provided with a spring positioning hole at each end corresponding to the spring.

10. The zero-point positioning disk structure improvement as described in any one of claims 1 to 9, wherein an additional body is provided to provide several zero-point positioning disks placed side by side, horizontally, or obliquely, so as to facilitate the installation of more vises to clamp workpieces and improve the machining efficiency of CNC machine tools.

11. An improved zero-point positioning disc structure, comprising: a disc body having an accommodating space therein, and a plurality of positioning holes on the top surface of the disc body, the plurality of positioning holes being interconnected and penetrating the accommodating space; a through hole on the side of the disc body, the through hole also being interconnected with the accommodating space; two crescent-shaped inserts being mounted opposite each other in the accommodating space of the disc body, the outer edges of the two crescent-shaped inserts being laterally inserted into the corresponding plurality of positioning holes, and the two crescent-shaped inserts having two mating screw holes opposite each other and having different thread directions; and a transmission screw having two external thread portions with different thread directions on a rod body, and the two external thread portions being high-lead external threads; the transmission screw extending through the through hole of the disc body, so as to facilitate driving the two crescent-shaped inserts to quickly move closer or further apart by operating the transmission screw.

12. The zero-point positioning disk structure improvement as described in claim 11, wherein the plurality of positioning holes are four and arranged in a matrix, and the bottom of the disk body is provided with a plurality of fixing holes; the two external thread portions of the transmission screw are connected to the two connecting screw holes of the corresponding two crescent-shaped inserts; and the two external thread portions are both provided as double or triple threads with high lead.

13. The improved zero-point positioning disk structure as described in claim 12, wherein the bottom end face of the disk body is provided with a bottom hole and the bottom hole communicates with the receiving space, and the disk body further includes a cover body disposed in the bottom hole.

14. An improved zero-point positioning disc structure as described in claim 13, wherein the cover is fitted with a C-shaped buckle to be attached to the bottom hole.

15. The zero-point positioning disk structure improvement as described in claim 12, wherein the cross-section of the outer edge of the two crescent-shaped inserts is a pointed cone shape, so as to facilitate the outer edge to be embedded in the annular groove of the several positioning pins provided by the vise.

16. The zero-point positioning disk structure improvement as described in claim 12, wherein the through hole of the disk body is configured as a fisheye hole, and the outer end of the transmission screw is configured as a head to be recessed into the fisheye hole-shaped through hole, and the head is provided with an internal hexagonal groove to facilitate the insertion of a hexagonal wrench.

17. The improved zero-point positioning disk structure as described in claim 12, wherein the transmission screw is configured as a two-piece unit and is connected into one piece by a polygonal connecting rod to facilitate driving the two crescent-shaped inserts.

18. The improved zero-point positioning disk structure as described in claim 17, wherein the two-piece structure has two polygonal holes at opposite ends to provide for fitting the polygonal connecting rod, and two fixing screw holes communicating with the two polygonal holes to provide two screws for fixing and positioning the polygonal connecting rod.

19. The improved zero-point positioning disk structure as described in claim 12, wherein two springs are provided between the two crescent-shaped inserts, and each of the two crescent-shaped inserts is provided with a spring positioning hole at each end corresponding to the spring.

20. The zero-point positioning disk structure improvement as described in any one of claims 11 to 19, wherein an additional body is provided to provide several zero-point positioning disks placed side by side, horizontally, or at an angle, so as to facilitate the installation of more vises to clamp workpieces and improve the machining efficiency of CNC machine tools.

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