Improved structure of the zero-point positioning plate

Abstract

In the field of machine tool accessories, this invention provides an improved structure for a zero-point positioning plate that simplifies the internal mechanism and improves ease of assembly. [Solution] The zero-point positioning plate comprises a plate body 1 having a housing space 11 and a plurality of positioning holes 12 inside, and a through hole 13 on its side, two crescent-shaped engagement blocks 2 installed in the housing space and having two connecting screw holes 22, 22a with screw threads facing in opposite directions, and a transmission screw 3 having two male screw portions 31, 31a with screw threads facing in opposite directions on a shaft body 30. The transmission screw is inserted through the through hole and connected to the connecting screw hole, and by operating the transmission screw, the two crescent-shaped engagement blocks are brought closer together or further apart, gripping the positioning pin of the vise that holds the workpiece.

Description

Technical Field

[0001] The present invention belongs to the technical field of accessories for machine tools, particularly to an improved structure of a zero-point positioning plate.

Background Art

[0002] Zero-point positioning systems have become essential equipment in CNC (Computer Numerical Control) machining manufacturers, automated production lines, and industries that require high-precision and high-speed tool changes (such as automotive, aerospace, medical technology, electronic device manufacturing, etc.). Due to the pursuit of precision and efficiency in manufacturing, the market scale has been continuously expanding.

[0003] In a zero-point positioning system, the main function of the zero-point positioning plate is to accurately and repeatedly position a workpiece or a center vice with respect to a fixed reference point (zero point), and its repeatability accuracy usually reaches the micrometer level. For this, there is technology disclosed in Taiwan Utility Model No. M589092, "Structure of a Zero-Point Positioning Indexing Plate for a Multi-Axis Machining Center", etc.

[0004] However, the engagement method of the aforementioned invention uses a plurality of linkages and their tapered ends, etc. to be interlocked, but there is a problem that the interlocking mechanism is complex, assembly is not easy, and mass production is difficult.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Therefore, in light of the difficulties present in the aforementioned conventional zero-point positioning plates, the inventor has dedicated himself to developing the improved structure of the zero-point positioning plate of this invention. The main objective of this invention is to provide an improved structure of a zero-point positioning plate with simplified internal operating mechanism components. The second objective of this invention is to provide an improved structure of a zero-point positioning plate with strong and reliable positioning engagement. Furthermore, a further objective of this invention is to provide an improved structure of a zero-point positioning plate that can increase the machining efficiency of CNC machine tools. [Means for solving the problem]

[0006] To achieve the above objective, the present invention employs the following technical means: a plate body having a housing space formed inside, a plurality of positioning holes provided on the top end surface of the plate body, the plurality of positioning holes communicating and penetrating the housing space, a through hole provided on one side surface of the plate body and the through hole communicating with the housing space; two crescent-shaped engaging blocks installed facing each other within the housing space, the outer edges of the two crescent-shaped engaging blocks being inserted laterally corresponding to the plurality of positioning holes, and the two crescent-shaped engaging blocks being provided with two connecting screw holes having screw threads that are relative to each other and in opposite directions; and a transmission screw having two male screw portions having screw threads that are in opposite directions on the shaft of the transmission screw, the transmission screw extending through the through hole of the plate body, and rotating the transmission screw to drive the two crescent-shaped engaging blocks to move closer together or further apart from each other.

[0007] Side recesses are provided on two sides of the plate body that are opposite to each other, there are four positioning holes arranged in a matrix, and the two male threaded portions provided on the transmission screw are screwed into the two connecting screw holes provided on the corresponding two crescent-shaped engagement blocks.

[0008] The bottom surface of the plate body is provided with a bottom hole that communicates with the storage space, and the plate body further includes a lid that is placed in the bottom hole.

[0009] The cover is engaged with the bottom hole via a C-type retaining ring.

[0010] The cross-sections of the outer edges of the two crescent-shaped engagement blocks are tapered so that the outer edges fit into the annular grooves of the multiple positioning pins provided in the vise.

[0011] The through-hole in the plate body is formed in the shape of a counterbore, and the outer end of the transmission screw is provided with a head portion that sinks into the counterbore-shaped through-hole, and the head portion is provided with a hexagonal hole for inserting a hex wrench.

[0012] The aforementioned transmission screw has a two-part structure, which is integrally connected via a polygonal connecting rod to drive the two crescent-shaped engaging blocks.

[0013] The opposing ends of the two-member configuration are provided with two polygonal holes for inserting the polygonal connecting rod, and the two-member configuration is further provided with two fixing screw holes that communicate with the two polygonal holes for inserting two screws for fixing the polygonal connecting rod.

[0014] Two springs are installed between the two crescent-shaped engaging blocks, and each of the two crescent-shaped engaging blocks is provided with spring positioning holes corresponding to both ends of the springs.

[0015] The system further includes a base for mounting multiple zero-point positioning plates in parallel, horizontally, upright, or at an angle, and by attaching more vises to clamp workpieces, the machining efficiency of the CNC machine tool is improved. [Effects of the Invention]

[0016] By employing the technical means described above, this invention can achieve the following effects. 1. This invention simplifies the internal mechanism for positioning and engaging the vise to its main components: two crescent-shaped engaging blocks and a transmission screw. Furthermore, by combining connecting screw holes and male screw portions in different directions, the proximity and separation of the two crescent-shaped engaging blocks within the plate body can be controlled simply by rotating the transmission screw forward or backward. This allows the tapered outer edge of the crescent-shaped engaging block to be inserted laterally into the positioning hole, thereby positioning and engaging the positioning pin of the inserted vise.

[0017] 2. The positioning holes in the plate body are arranged in a matrix to receive the positioning pins of the vise, and the tapered outer edge of the crescent-shaped engagement block is fitted into the annular groove of the positioning pin. By utilizing the elasticity of the two springs, the vise can be firmly positioned and engaged.

[0018] 3. The improved structure of multiple zero-point positioning plates can be arranged in parallel, upright, or inclined, allowing for the installation of more vises to clamp workpieces and improving the machining efficiency of CNC machine tools. [Brief explanation of the drawing]

[0019] [Figure 1] This is a three-dimensional external view showing the improved structure of the zero-point positioning plate of the present invention. [Figure 2] This is a plan view and an assembly drawing of the internal mechanism of the improved structure of the zero-point positioning plate of the present invention. [Figure 3] This is an exploded view showing the internal mechanism components of the improved structure of the zero-point positioning plate according to the present invention. [Figure 4] This figure shows the internal mechanism components of the present invention in a state where they are engaged and positioned with the vise. [Figure 5] This figure shows the internal mechanism components of the present invention in a state where the engagement position of the vise has been released. [Figure 6]It is a cross-sectional view taken along line a-a in FIG. 2 of the present invention, showing the vice in an engaged and positioned state. [Figure 7] It is a view showing an embodiment in which the present invention is applied to a circular plate body. [Figure 8] It is a view showing an embodiment in which the present invention is applied to a rectangular plate body. [Figure 9] It is a view showing an embodiment in which the present invention is applied to a vertically standing square plate body. [Figure 10] It is a view showing an embodiment in which the present invention is applied to a vertically standing triangular prism-shaped plate body. [Figure 11] It is a view showing an embodiment in which the present invention is applied by being attached to a vertically standing quadrangular prism-shaped base. [Figure 12] It is a view showing an embodiment in which the present invention is applied by being attached to three circular plates on a hemispherical base.

Embodiments for Carrying out the Invention

[0020] The present invention relates to an improved structure of a kind of zero-point positioning plate. As shown in FIGS. 1 and 2, mainly by simplifying its internal mechanism members, the ease of assembly is improved. At the same time, the positioning pin 51 of the vice 5 is positioned and engaged, and it is used to facilitate the vice 5 to hold a workpiece and perform numerical control machining. The improved structure A of the zero-point positioning plate includes a plate body 1, two semi-circular engaging blocks 2, a transmission screw 3, etc. Hereinafter, the above-described structural embodiments will be individually described together with the drawings.

[0021] As shown in Figures 2 and 3, the plate body 1 has a housing space 11 inside. Two sides of the plate body located on opposite sides are each provided with side recesses 10. The top end surface of the plate body 1 is provided with a plurality of positioning holes 12, all of which communicate with and penetrate the housing space 11. Furthermore, a through hole 13 is provided on one side of the plate body 1 (a location on a different side where the side recesses 10 are not provided). The through hole 13 is formed in the shape of a counterbore and communicates with the housing space 11. The plurality of positioning holes 12 are provided in four and arranged in a matrix. The bottom end surface of the plate body 1 is provided with a bottom hole 14, which communicates with the housing space 11, facilitating the placement of the two crescent-shaped engaging blocks 2 into the housing space 11. The plate body 1 also includes a lid 15, which is placed in the bottom hole 14. The arrangement of the two components is such that the C-shaped retaining ring 16 engages with the retaining ring groove 141 provided in the bottom hole 14, thereby fixing (attaching) the cover 15 to the bottom hole 14.

[0022] As shown in Figures 2 and 3, the two crescent-shaped engagement blocks 2 are positioned facing each other and separated by a distance d within the housing space 11 of the plate body 1. The outer edges 21 of the two crescent-shaped engagement blocks 2 are inserted laterally into the plate body 1 in accordance with the multiple positioning holes 12. The two crescent-shaped engagement blocks 2 are also provided with coupling screw holes 22 and coupling screw holes 22a that are relative to each other and have different screw directions. The cross-sections of the outer edges 21 of the two crescent-shaped engagement blocks 2 are both tapered. This is to facilitate the insertion of the outer edges 21 into the annular grooves 511 of the multiple positioning pins 51 of the vise 5, which are inserted into the multiple positioning holes 12. Furthermore, two springs 24 are installed between the two crescent-shaped engagement blocks 2. The two crescent-shaped engagement blocks 2 are each provided with spring positioning holes 23 corresponding to the two ends of each spring 24, thereby positioning and fixing each spring 24.

[0023] As shown in Figures 3 and 4, the transmission screw 3 has male threaded portions 31 and 31a on its shaft 30, each facing a different thread direction. The transmission screw 3 extends through the through hole 13 of the plate body 1, and its male threaded portions 31 and 31a are then screwed into the corresponding connecting screw holes 22 and 22a provided in the two crescent-shaped engaging blocks 2. This allows the two crescent-shaped engaging blocks 2 to be driven to move closer together or further apart by operating the transmission screw 3. The outer end of the shaft 30 of the transmission screw 3 is provided with a head portion 301 that can be recessed into the counterbore-shaped through hole 13. The head portion 301 is provided with a hexagonal socket 302, which facilitates the forward or reverse rotation of the transmission screw 3 by inserting a tool such as a hex wrench 6.

[0024] Furthermore, the transmission screw 3 is provided as a two-piece configuration 32, and the transmission screw 3 is integrally connected via a polygonal connecting rod 33, making it easy to drive the two crescent-shaped engagement blocks 2 using the male screw portion 31 and the male screw portion 31a. Two polygonal holes 321 are provided at the opposing ends of the two-piece configuration 32 for inserting the polygonal connecting rod 33. In addition, two fixing screw holes 322 are provided that communicate with the two polygonal holes 321, and the polygonal connecting rod 33 is fixed and positioned by two screws 34. This coupling structure, consisting of the two-piece configuration 32, the connecting rod 33, and the two screws 34, facilitates the installation of the transmission screw 3.

[0025] Therefore, this invention provides a preferred solution for an improved structure of a zero-point positioning plate. As shown in Figures 3 and 4, the internal mechanism members that primarily position and engage the vise 5 are simplified to only the main members such as the two crescent-shaped engagement blocks 2 and the transmission screw 3. During assembly, first, the male screw portion 31a provided on one of the two-member configuration 32 is screwed into the connecting screw hole 22a provided on one of the crescent-shaped engagement blocks 2. Then, the connecting rod 33 and the corresponding screw 34 are mounted on the corresponding polygonal hole 321 on one of the two-member configuration 32. After inserting the outer end of the connecting rod 33 into the connecting screw hole 22 provided on the other crescent-shaped engagement block 2, the two crescent-shaped engagement blocks 2 are separated by a distance d or less. As a result, after the two crescent-shaped engagement blocks 2 are installed inside the housing space 11 of the plate body 1, the remaining half of the transmission screw 3 is inserted through the through hole 13, its male threaded portion 31 is screwed into the corresponding coupling screw hole 22, and then the polygonal hole 321 of the remaining half of the transmission screw 3 is inserted into the outer end of the connecting rod 33 and the screw 34 is tightened. Finally, by attaching the lid 15 to the bottom hole 14 using the C-type retaining ring 16, the assembly of the internal mechanism members of the improved structure of the zero-point positioning plate of the present invention is completed.

[0026] Next, refer to Figures 4 to 6. The method of positioning and engaging the vise 5 holding the workpiece in this invention involves inserting one end of the hexagonal wrench 6 into the hexagonal hole 302 in the head portion 301 of the transmission screw 3, and rotating the transmission screw 3 in the forward or reverse direction. This allows control of the approach and separation of the two crescent-shaped engagement blocks 2 located within the plate body 1 through the screwing of the two different directions of the connecting screw holes 22 and 22a and the male screw portions 31 and 31a. In other words, the vise 5 is locked and fixed by the principle that the right-hand and left-hand threads spread outward from each other. Furthermore, by inserting the tapered outer edges 21 of the two crescent-shaped engagement blocks 2 laterally into the plurality of positioning holes 12, the annular groove 511 of the positioning pin 51 of the vise 5, which is already inserted into the plurality of positioning holes 12, is positioned and engaged. By simultaneously combining the elasticity of the two springs 24, the objective of firmly positioning and engaging the vise 5 is achieved.

[0027] Furthermore, in addition to the basic applications of the present invention described above, as shown in Figures 1, 2, and 7, the plate body 1 is preferably set to be rectangular or circular, but it is also possible to derive other variations, such as setting up multiple zero-point positioning plate improved structures A in parallel, flat, upright, or inclined, as shown in Figures 8 to 12. This allows more vises 5 to be installed to clamp workpieces, thereby improving the machining efficiency of the CNC machine tool. Here, Figure 8 is an embodiment diagram in which the present invention is applied to a rectangular plate body 1, showing the case where two zero-point positioning plate improved structures A are placed in parallel on a flat surface. Figure 9 is an embodiment in which the present invention is applied to a rectangular plate body 1 which is set to be upright and has a thicker thickness, and one zero-point positioning plate (surface) is provided on each side of the rectangular plate body 1, showing the case where two zero-point positioning plate improved structures A are placed in parallel on a flat surface. Figure 10 shows an embodiment of the present invention in which a triangular prism-shaped plate body 1 is erected and mounted on a base 7, and one zero-point positioning plate (surface) is provided on all three faces of the triangular prism-shaped plate body 1, and shows the case in which three improved zero-point positioning plate structures A are erected. Figure 11 shows an embodiment of the present invention in which a single rectangular prism is erected and mounted on a base 7, and multiple zero-point positioning plates are provided on all four faces of the rectangular prism-shaped plate body, and shows the case in which eight improved zero-point positioning plate structures A are erected. Figure 12 shows an embodiment of the present invention in which three circular zero-point positioning plate bodies 1 are arranged inclined on a hemispherical base 7, and shows the case in which three improved zero-point positioning plate structures A are arranged inclined.

[0028] In summary, this invention relates to an improved structure for a type of zero-point positioning plate, and its configuration and structure have not yet been published or publicly demonstrated. Therefore, this invention meets the requirements for utility model registration, and we earnestly request that your office promptly review this and grant registration as soon as possible.

[0029] It should be noted that what is described above is merely the technical principle applied in the specific embodiments of this invention. Any modifications made in accordance with the concept of this invention, whose resulting functions and operations do not exceed the technical ideas described in the specification and drawings of this invention, should all be included within the scope of the claims of this invention. [Explanation of symbols]

[0030] A: Improved structure of the zero-point positioning plate 1: Plate body 10: Side recess 11: Containment space 12: Positioning hole 13: Through hole 14:Bottom hole 141: Retaining groove 15: Lid 16:C type retaining ring 2: Crescent-shaped engagement block 21: Outer edge 22, 22a: Connecting screw holes 23: Spring positioning hole 24: Spring 3: Drive screws 30: Axis 301: Head section 302:Hexagonal hole 31, 31a: Male threaded portion 32:2 component configuration 321: Polygonal hole 322: Fixing screw holes 33: Connecting rod 34: Screw 5: Vice 51: Positioning pin 511: Ring groove 6: Hex wrench 7: Bass

Claims

1. A plate body having a housing space formed inside, a plurality of positioning holes provided on the top end surface of the plate body, the plurality of positioning holes communicating and penetrating the housing space, a through hole provided on one side surface of the plate body, the through hole communicating with the housing space, Two crescent-shaped engaging blocks are installed facing each other within the aforementioned housing space, wherein the outer edges of the two crescent-shaped engaging blocks are inserted laterally in correspondence with the plurality of positioning holes, and the two crescent-shaped engaging blocks are provided with two connecting screw holes having threads that are relative to each other and facing opposite directions, A transmission screw, wherein two male threaded portions having opposite threads are provided on the shaft of the transmission screw, the transmission screw extends through a through hole in the plate body, and the transmission screw rotates to drive the two crescent-shaped engaging blocks to move closer together or further apart from each other, An improved structure for a zero-point positioning plate, characterized by comprising the following features.

2. The improved structure of the zero-point positioning plate according to claim 1, characterized in that side recesses are provided on two sides of the plate body that are opposite to each other, the plurality of positioning holes are four in number and arranged in a matrix, and the two male threaded portions provided on the transmission screw are screwed into the two connecting screw holes provided on the corresponding two crescent-shaped engagement blocks.

3. The improved zero-point positioning plate structure according to claim 2, characterized in that the bottom surface of the plate body is provided with a bottom hole that communicates with the storage space, and the plate body further comprises a lid that is placed in the bottom hole.

4. The improved structure of the zero-point positioning plate according to claim 3, characterized in that the cover is engaged with the bottom hole via a C-type retaining ring.

5. The improved zero-point positioning plate structure according to claim 2, characterized in that the cross-sections of the outer edges of the two crescent-shaped engagement blocks are tapered so that the outer edges fit into the annular grooves of a plurality of positioning pins provided in the vise.

6. The improved zero-point positioning plate structure according to claim 2, characterized in that the through hole of the plate body is formed in the shape of a counterbore, the outer end of the transmission screw is provided with a head portion that sinks into the counterbore through hole, and the head portion is provided with a hexagonal hole for inserting a hex wrench.

7. The improved zero-point positioning plate structure according to claim 2, characterized in that the transmission screw has a two-member configuration, and the two-member configuration is integrally connected via a polygonal connecting rod to drive the two crescent-shaped engagement blocks.

8. The improved zero-point positioning plate structure according to claim 7, characterized in that two polygonal holes for inserting the polygonal connecting rod are provided at the opposing ends of the two member configuration, and the two member configuration is further provided with two fixing screw holes for inserting two screws for fixing the polygonal connecting rod, which communicate with the two polygonal holes.

9. The improved zero-point positioning plate structure according to claim 2, characterized in that two springs are installed between the two crescent-shaped engaging blocks, and the two crescent-shaped engaging blocks are each provided with spring positioning holes corresponding to both ends of the springs.

10. An improved zero-point positioning plate structure according to any one of claims 1 to 9, further comprising a base for installing a plurality of the zero-point positioning plates in parallel, horizontally, upright, or at an angle, thereby improving the machining efficiency of a CNC machine tool by mounting more vises to clamp workpieces.

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