Zero-point quick-change clamp with central through hole

Abstract

The utility model relates to a zero-point quick-change fixture with a central through hole, which comprises a base, the middle of the base is provided with a through hole which can be used as a reference hole or a central positioning hole, the base is provided with a plurality of first blind rivet positioning holes at equal intervals around the through hole, and the base is provided with a plurality of second blind rivet positioning holes at equal intervals around the through hole. The distance from the second blind rivet positioning hole to the through hole is greater than that from the first blind rivet positioning hole to the through hole; first blind rivets are detachably connected into the first blind rivet positioning holes, second blind rivets are detachably connected into the second blind rivet positioning holes, an annular rotating cam is rotatably arranged in the base, and the inner side and the outer side of the annular rotating cam are matched with the multiple first blind rivets and the multiple second blind rivets correspondingly. An eccentric rotating shaft is rotatably arranged on the base and used for driving the annular rotating cam to rotate. According to the zero-point quick-change clamp with the central through hole, high-precision positioning and clamping can be achieved, clamping work can be quickly completed, and universality and interchangeability are extremely high.

Description

Technical Field

[0001] The utility model relates to the technical field of fixtures, in particular to a zero-point quick-change fixture with a central through hole. Background Art

[0002] During the processing of conventional parts, many products need to be machined on polyhedrons and require multiple clampings to complete each process, which will lead to low production efficiency, decreased accuracy, increased waste products. At the same time, it is also necessary to find the reference position of the part multiple times. For each product produced, a set of tooling fixtures needs to be remade. There are many specifications and types, which are fixed and not interchangeable and universal, time-consuming and laborious. Not only is there no efficiency, but the cost cannot be controlled, and the accuracy cannot be guaranteed either. Content of the Utility Model

[0003] Based on this, the purpose of the utility model is to overcome the deficiencies of the prior art and provide a zero-point quick-change fixture with a central through hole, which can achieve high-precision positioning and clamping, and can also quickly complete the clamping work, with extremely high versatility and interchangeability.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A zero-point quick-change fixture with a central through hole, including a base. A through hole is provided in the middle of the base. A number of first pull stud positioning holes are equidistantly arranged around the through hole on the base. A number of second pull stud positioning holes are equidistantly arranged around the through hole on the base. The distance from the second pull stud positioning hole to the through hole is greater than the distance from the first pull stud positioning hole to the through hole. A first pull stud is detachably connected in the first pull stud positioning hole, and a second pull stud is detachably connected in the second pull stud positioning hole. An annular rotating cam is rotatably arranged inside the base. The inner and outer sides of the annular rotating cam are respectively matched with a number of the first pull studs and a number of the second pull studs. An eccentric rotating shaft is rotatably arranged on the base. The eccentric rotating shaft is used to drive the annular rotating cam to rotate, so that the annular rotating cam locks the first pull stud and the second pull stud at the same time, or separates the annular rotating cam from the first pull stud and the second pull stud at the same time.

[0006] As an implementation manner, an annular limiting groove for the annular rotating cam to rotate is provided inside the base. The central axis of the annular limiting groove coincides with the central axis of the through hole. A limiting through groove communicating with the annular limiting groove is formed by inward depression along the radial direction on the outer side wall of the base. The eccentric rotating shaft is rotatably arranged in the limiting through groove, and the eccentric rotating shaft is matched with the outer side of the annular rotating cam.

[0007] As an implementation manner, a notch is formed by radially inwards recessing the outer side wall of the annular rotating cam, the notch penetrates through both end faces of the annular rotating cam, an eccentric column axially protrudes from the inner end face of the eccentric rotating shaft, the eccentric column is inserted into the notch, and the width of the eccentric column is slightly smaller than the width of the notch.

[0008] As an implementation manner, an eccentric rotating shaft limiting cover is arranged in the limiting through groove, the eccentric rotating shaft limiting cover is movably sleeved on the outer side wall of the eccentric rotating shaft, so that the eccentric rotating shaft can rotate circumferentially relative to the axis of the eccentric rotating shaft limiting cover; a polygonal hole is axially recessed from the outer end face of the eccentric rotating shaft.

[0009] As an implementation manner, a first inclined surface matched with the first pull stud is arranged on the inner side wall of the annular rotating cam, a first annular conical surface is arranged at one end of the first pull stud inserted into the first pull stud positioning hole, and the first annular conical surface is matched with the first inclined surface; a second inclined surface matched with the second pull stud is arranged on the outer side wall of the annular rotating cam, a second annular conical surface is arranged at one end of the second pull stud inserted into the second pull stud positioning hole, and the second annular conical surface is matched with the second inclined surface.

[0010] As an implementation manner, the number of the first pull studs is four, the number of the second pull studs is four, and the first pull stud and the nearest adjacent second pull stud are located in the same radial direction.

[0011] As an implementation manner, a plurality of mounting holes are arranged on the base, and the mounting holes are used for connecting with a machine tool.

[0012] As an implementation manner, the base is of a disc-shaped structure.

[0013] As an implementation manner, a threaded hole is arranged on the first pull stud, and the threaded hole is used for anti-fooling clamping.

[0014] Compared with the traditional technology, the beneficial effects of the zero-point quick-change fixture with a central through hole described in the present utility model are:

[0015] The utility model is applicable to a zero-point quick-change fixture with a central through-hole. By arranging a through-hole in the middle of the base, the through-hole can be used as a reference hole or a central positioning hole, which can effectively and accurately position and lock, thereby shortening the clamping time, improving the product precision, and having extremely high versatility and interchangeability. In addition, through the through-hole opened in the middle of the base of the utility model, it can be applied to the processing of long-shaft products, or for passing wires or air pipes, etc., which is more convenient for the customization and installation of self-made fixtures. Specifically, the utility model arranges a first pull stud positioning hole and a second pull stud positioning hole on the base to respectively allow the first pull stud and the second pull stud to be inserted therein, and then rotates the eccentric rotating shaft to drive the eccentric column on the eccentric rotating shaft to rotate. By using the eccentric design of the eccentric column, the eccentric column can drive the annular rotating cam to rotate around the through-hole during the rotation process, and then simultaneously lock the first pull stud and the second pull stud on the inner and outer sides of the annular rotating cam, or separate the annular rotating cam from the first pull stud and the second pull stud at the same time.

[0016] In addition, by designing two positioning holes with different hole pitches from the central through-hole on the base of the utility model, two first pull studs and second pull studs with different sizes, as well as at least two vises or fixtures with different hole pitches, can be installed on the base at the same time, eliminating the conversion process of pull studs with different sizes and conversion plates with different hole pitches, which can reduce the conversion time and conversion precision error, improve the conversion speed and conversion precision, make the operation more convenient and fast, and at the same time can also save the cost of adding conversion plates.

[0017] For better understanding and implementation, the following will describe the utility model in detail with reference to the accompanying drawings. Description of the Drawings

[0018] Figure 1 It is a perspective view of the zero-point quick-change fixture with a central through-hole of the utility model;

[0019] Figure 2 It is a front view of the zero-point quick-change fixture with a central through-hole of the utility model;

[0020] Figure 3 It is a top view of the zero-point quick-change fixture with a central through-hole of the utility model;

[0021] Figure 4 It is an exploded schematic view of the zero-point quick-change fixture with a central through-hole of the utility model;

[0022] Figure 5 It is an internal structure schematic view of the zero-point quick-change fixture with a central through-hole of the utility model.

[0023] 10. Base; 11. Through hole; 12. First rivet positioning hole; 13. Second rivet positioning hole; 14. Mounting hole; 15. Limit through slot; 16. Eccentric rotating shaft limit cover; 20. First rivet; 21. First annular conical surface; 30. Second rivet; 31. Second annular conical surface; 40. Annular rotating cam; 41. First inclined surface; 42. Second inclined surface; 43. Notch; 50. Eccentric rotating shaft; 51. Eccentric column; 52. Polygonal hole. Detailed implementation mode

[0024] To further illustrate each embodiment, the present invention provides drawings. These drawings are part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operation principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present invention.

[0026] Please refer to Figures 1 to 5 ; This embodiment provides a zero-point quick-change fixture with a central through hole, including a base 10. A through hole 11 is provided in the middle of the base 10. A plurality of first rivet positioning holes 12 are provided on the base 10 at equal intervals around the through hole 11. A plurality of second rivet positioning holes 13 are provided on the base 10 at equal intervals around the through hole 11. The distance from the second rivet positioning hole 13 to the through hole 11 is greater than the distance from the first rivet positioning hole 12 to the through hole 11. A first rivet 20 is detachably connected in the first rivet positioning hole 12. A second rivet 30 is detachably connected in the second rivet positioning hole 13. An annular rotating cam 40 is rotatably provided inside the base 10. The inner and outer sides of the annular rotating cam 40 are respectively matched with a plurality of the first rivets 20 and a plurality of the second rivets 30. An eccentric rotating shaft 50 is rotatably provided on the base 10. The eccentric rotating shaft 50 is used to drive the annular rotating cam 40 to rotate, so that the annular rotating cam 40 locks the first rivet 20 and the second rivet 30 at the same time, or the annular rotating cam 40 separates from the first rivet 20 and the second rivet 30 at the same time.

[0027] In this embodiment, an annular limiting groove for the annular rotating cam 40 to rotate is provided inside the base 10, and the central axis of the annular limiting groove overlaps with the central axis of the through hole 11; a limiting through groove 15 communicating with the annular limiting groove is formed by radially inward depression on the outer side wall of the base 10, and the eccentric rotating shaft 50 is rotatably arranged in the limiting through groove 15, and the eccentric rotating shaft 50 is matched with the outer side of the annular rotating cam 40. Specifically, a notch 43 is formed by radially inward depression on the outer side wall of the annular rotating cam 40, the notch 43 penetrates through both end faces of the annular rotating cam 40, an eccentric column 51 axially protrudes on the inner end face of the eccentric rotating shaft 50, the eccentric column 51 is inserted into the notch 43, and the width of the eccentric column 51 is slightly smaller than the width of the notch 43.

[0028] Further, a first inclined surface 41 for cooperating with the first pull stud 20 is provided on the inner side wall of the annular rotating cam 40, a first annular tapered surface 21 is provided at one end of the first pull stud 20 inserted into the first pull stud positioning hole 12, and the first annular tapered surface 21 cooperates with the first inclined surface 41; a second inclined surface 42 for cooperating with the second pull stud 30 is provided on the outer side wall of the annular rotating cam 40, a second annular tapered surface 31 is provided at one end of the second pull stud 30 inserted into the second pull stud positioning hole 13, and the second annular tapered surface 31 cooperates with the second inclined surface 42.

[0029] In this embodiment, an eccentric rotating shaft limiting cover 16 is provided in the limiting through groove 15, and the eccentric rotating shaft limiting cover 16 is movably sleeved on the outer side wall of the eccentric rotating shaft 50, so that the eccentric rotating shaft 50 can rotate circumferentially relative to the axis of the eccentric rotating shaft limiting cover 16. In addition, in order to facilitate the user to drive the eccentric rotating shaft 50 to rotate, a polygonal hole 52 is axially recessed on the outer end face of the eccentric rotating shaft 50, and the polygon can be in the shape of a regular hexagon, a regular octagon, etc., and the user can drive the eccentric rotating shaft 50 to rotate by means of a plug corresponding to the shape of the polygonal hole 52.

[0030] Among them, the number of the first pull studs 20 in this embodiment is four, the number of the second pull studs 30 is four, and the first pull stud 20 and the nearest adjacent second pull stud 30 are located in the same radial direction.

[0031] Furthermore, the four first rivets 20 of this embodiment are all provided with threaded holes, which are used for clamping and foolproofing; it can be understood that the threaded holes are used as foolproofing holes. Specifically, a screw is installed in the threaded hole of any first rivet 20, so that the screw protrudes at least 10 mm, and a hole larger than the screw is processed at the bottom of the vise or the bottom of the conversion plate according to the foolproofing hole distance data, so that the hole can pass the screw. If the position is not placed correctly during clamping, the screw will be pressed, thereby achieving foolproofing.

[0032] In this embodiment, the base 10 is a disc-shaped structure, and a plurality of mounting holes 14 are provided on the base 10. The mounting holes 14 are used to connect with a machine tool.

[0033] Compared with the traditional technology, the utility model is suitable for a zero-point quick-change fixture with a central through hole 11. By setting a through hole 11 in the middle of the base 10, the through hole 11 can be used as a reference hole or a central positioning hole, which can effectively and accurately position and lock, thereby shortening the clamping time, improving product accuracy, and having extremely high versatility and interchangeability. In addition, the utility model can be applied to the processing of long-axis products through the through hole 11 opened in the middle of the base 10, and can also be used for passing wires or air pipes, etc., which is more convenient for the customization and installation of homemade fixtures. Specifically, the utility model provides a first rivet positioning hole 12 and a second rivet positioning hole 13 on the base 10 for inserting the first rivet 20 and the second rivet 30 therein, respectively, and then rotates the eccentric shaft 50 to drive the eccentric column 51 on the eccentric shaft 50 to rotate. The eccentric design of the eccentric column 51 can drive the annular rotating cam 40 to rotate around the through hole 11 during the rotation process, and then the first rivet 20 and the second rivet 30 are locked simultaneously through the inner and outer sides of the annular rotating cam 40, or the annular rotating cam 40 is separated from the first rivet 20 and the second rivet 30 at the same time.

[0034] In addition, the utility model designs two positioning holes with different hole spacings from the central through hole 11 on the base 10, so that two first rivets 20 and second rivets 30 of different sizes and at least two vises or clamps with different hole spacings can be installed on the base at the same time, thereby eliminating the conversion process of rivets of different sizes and conversion plates with different hole spacings, which can reduce the conversion time and conversion accuracy error, improve the conversion speed and conversion accuracy, make the operation more convenient and quick, and also save the cost of adding a conversion plate.

[0035] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the zero-point quick-change fixture with a central through hole of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all fall within the protection scope of the present utility model.

Claims

1. A zero-point quick-change fixture with a central through hole, characterized in that: The invention comprises a base, a through hole is provided in the middle part of the base, a plurality of first rivet positioning holes are provided on the base at equal intervals around the through hole, a plurality of second rivet positioning holes are provided on the base at equal intervals around the through hole, a distance from the second rivet positioning hole to the through hole is greater than a distance from the first rivet positioning hole to the through hole; a first rivet is detachably connected to the first rivet positioning hole, and a second rivet is detachably connected to the second rivet positioning hole, an annular rotating cam is rotatably provided inside the base, the inner and outer sides of the annular rotating cam are respectively matched with a plurality of the first rivets and a plurality of the second rivets, an eccentric rotating shaft is rotatably provided on the base, and the eccentric rotating shaft is used to drive the rotation with the annular rotating cam, so that the annular rotating cam locks the first rivet and the second rivet at the same time, or the annular rotating cam is separated from the first rivet and the second rivet at the same time.

2. The zero-point quick-change fixture with a central through hole according to claim 1, characterized in that: The interior of the base is provided with an annular limiting groove for the annular rotating cam to rotate, and the central axis of the annular limiting groove overlaps with the central axis of the through hole; the outer wall of the base is recessed inwardly in the radial direction to form a limiting through groove connected to the annular limiting groove, and the eccentric rotating shaft is rotatably arranged in the limiting through groove, and the eccentric rotating shaft cooperates with the outer side of the annular rotating cam.

3. The zero-point quick-change fixture with a central through hole according to claim 2, characterized in that: The outer wall of the annular rotating cam is radially recessed inward to form a notch, and the notch passes through the two end surfaces of the annular rotating cam. An eccentric column protrudes axially on the inner end surface of the eccentric rotating shaft, and the eccentric column is inserted into the notch, and the width of the eccentric column is slightly smaller than the width of the notch.

4. The zero-point quick-change fixture with a central through hole according to claim 3, characterized in that: An eccentric shaft limiting cover is arranged in the limiting groove, and the eccentric shaft limiting cover is movably sleeved on the outer side wall of the eccentric shaft so that the eccentric shaft can rotate circumferentially relative to the axis of the eccentric shaft limiting cover; the outer end face of the eccentric shaft is axially recessed to form a polygonal hole.

5. The zero-point quick-change fixture with a central through hole according to claim 1, characterized in that: The inner side wall of the annular rotating cam is provided with a first inclined surface matching with the first pull stud, and the end of the first pull stud inserted into the first pull stud positioning hole is provided with a first annular conical surface, and the first annular conical surface matches with the first inclined surface; the outer side wall of the annular rotating cam is provided with a second inclined surface matching with the second pull stud, and the end of the second pull stud inserted into the second pull stud positioning hole is provided with a second annular conical surface, and the second annular conical surface matches with the second inclined surface.

6. The zero-point quick-change fixture with a central through hole according to claim 5, characterized in that: The number of the first pull studs is four, the number of the second pull studs is four, and the first pull studs and the second pull studs that are adjacent and closest to each other are located in the same radial direction.

7. The zero-point quick-change fixture with a central through hole according to claim 1, characterized in that: The base is provided with a plurality of mounting holes, and the mounting holes are used for connecting with the machine tool.

8. The zero-point quick-change fixture with a central through hole according to claim 1, characterized in that: The base is a disc-shaped structure.

9. The zero-point quick-change fixture with a central through hole according to claim 1, characterized in that: The first pull nail is provided with a threaded hole, and the threaded hole is used for clamping and preventing fooling.

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