A pneumatic taper hole zero point clamp

Abstract

The utility model relates to a kind of pneumatic belt taper hole zero point clamps, including clamp base;The inside of clamp base is equipped with airtight room, several pistons are arranged in a lift in airtight room, and airtight room is divided into upper chamber, lower chamber by piston, the upper end surface of clamp base is vertically downward and is equipped with pull nail lock cylinder, and the peripheral wall of pull nail lock cylinder is spaced apart and has several through holes in circumferential direction, and pull nail is detachably inserted in pull nail lock cylinder;The upper end surface middle part of piston is recessed and forms tubular recess, pull nail lock cylinder is inserted into the inside of tubular recess and is spaced apart with the peripheral wall of tubular recess, and ball is arranged between the through hole of pull nail lock cylinder and tubular recess, the sidewall of tubular recess is recessed and forms annular wedge gap, ball and the sidewall of wedge gap abut, and part of ball protrudes through hole and locks pull nail;When the pressure of lower chamber increases, piston rises and drives wedge gap to rise to make ball exit through hole to release pull nail, while piston pushes pull nail to rise.The utility model can realize high-precision positioning clamping, and also can quickly complete workpiece clamping, and higher universality.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a pneumatic zero-point clamp with a tapered hole. Background Technology

[0002] In the conventional parts machining process, many products require multi-faceted machining, necessitating multiple clamping operations to complete each process. This leads to low production efficiency, decreased precision, and increased scrap. Furthermore, it requires repeated alignment of the parts' reference positions. In addition, a new set of tooling fixtures needs to be fabricated for each product, with numerous specifications and types that are fixed and not interchangeable, resulting in significant time and labor costs. Utility Model Content

[0003] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a pneumatic zero-point clamp with a tapered hole, which can achieve high-precision positioning and clamping, and can also quickly complete workpiece clamping, with high versatility.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A pneumatic zero-point clamp with a tapered hole includes a clamp base; the clamp base has an airtight chamber inside, and a plurality of pistons are vertically and vertically arranged in the airtight chamber. The pistons divide the airtight chamber into an upper chamber and a lower chamber. The upper end face of the pistons abuts against the top of the upper chamber through a plurality of springs. The side wall of the clamp base has an interface communicating with the lower chamber. A rivet locking cylinder is vertically arranged downward on the upper end face of the clamp base. The rivet locking cylinder is a cylinder with open ends. A plurality of through holes are spaced apart along the circumferential direction on the peripheral wall of the rivet locking cylinder. A rivet is detachably inserted into the rivet locking cylinder.

[0006] The upper end face of the piston has a recessed cylindrical groove in the middle. The pull pin locking cylinder extends into the interior of the cylindrical groove and is spaced apart from the peripheral wall of the cylindrical groove. A ball is disposed between the cylindrical groove and the through hole of the pull pin locking cylinder. The side wall of the cylindrical groove has a recessed annular wedge-shaped notch. The ball abuts against the side wall of the wedge-shaped notch, and a part of the ball extends out of the through hole and locks the pull pin. When the pressure in the lower chamber increases, the piston rises and drives the wedge-shaped notch to rise so that the ball exits the through hole to release the pull pin. At the same time, the piston pushes the pull pin upward.

[0007] In one embodiment, an annular groove is formed on the outer peripheral wall of the rivet. A portion of the ball extends out of the through hole and can be inserted into the annular groove to lock the rivet. Alternatively, the ball can be withdrawn from the annular groove to release the rivet.

[0008] In one implementation, the width of the wedge-shaped notch decreases sequentially from bottom to top, and the maximum width of the wedge-shaped notch is less than the diameter of the sphere.

[0009] In one embodiment, the wedge-shaped notch is connected to the through hole.

[0010] In one embodiment, the upper end face of the clamp base is recessed to form a recessed hole that communicates with the upper chamber, and the pull pin locking cylinder is disposed in the recessed hole.

[0011] In one embodiment, a tapered sleeve is coaxially connected to the upper end of the rivet locking cylinder. The tapered sleeve has an open cylindrical structure at both ends, and the upper end face of the tapered sleeve is flush with the upper end face of the clamp base. The lower end face of the tapered sleeve abuts against the upper end face of the rivet locking cylinder. The inner diameter of the tapered sleeve gradually decreases from top to bottom.

[0012] In one embodiment, the upper outer periphery of the rivet is provided with a mating part that abuts against the inner wall of the tapered sleeve.

[0013] In one embodiment, a plurality of movable cone blocks are movably disposed between the mating part and the conical sleeve, the plurality of movable cone blocks together forming a circular structure, and the plurality of movable cone blocks are detachably disposed between the mating part and the conical sleeve; an annular sealing ring is provided at the bottom of the mating part, and the annular sealing ring abuts against the plurality of movable cone blocks.

[0014] In one embodiment, the clamp base is provided with a plurality of mounting through holes along the axial direction, and the plurality of mounting through holes are used for assembly and fixing with the object to be installed.

[0015] In one embodiment, the clamp base has a disc-shaped structure or a square structure.

[0016] Compared with traditional technologies, the beneficial effects of the pneumatic zero-point clamp with tapered hole described in this utility model are:

[0017] This invention features an airtight chamber within a clamp base, housing a piston within this chamber. External equipment supplies or evacuates air to the interface to control pressure changes in the lower chamber, thereby controlling the piston's vertical movement. Furthermore, the invention incorporates a rivet locking cylinder on the clamp base. The piston and the locking cylinder work together to drive a ball through a through-hole into the locking cylinder to lock the rivet, or to drive the ball out of the locking cylinder to release the rivet. When locking the rivet, the rivet is first inserted into the locking cylinder, and air is evacuated from the lower chamber to move the piston downwards. This causes the piston to lower a wedge-shaped notch. The narrower width of the upper end of the wedge-shaped notch pushes the ball, thus... The ball extends through the through hole into the inside of the rivet locking cylinder, thus achieving the locking effect of the rivet through several balls. When the rivet needs to be released, air is supplied to the lower chamber to cause the piston to rise under pressure. At this time, the piston drives the wedge-shaped notch to rise, and the gradually widening characteristic of the lower end of the wedge-shaped notch allows the ball to exit from the through hole into the rivet locking cylinder. At the same time, the piston can also drive the rivet to rise a certain distance, so that the rivet pushes the ball out of the through hole, thereby freeing the rivet from restraint. In other words, this utility model can release or lock the rivet by inflating or deflating the interface. Therefore, the pneumatic zero-point clamp with tapered hole can achieve high-precision positioning and clamping, and can also quickly complete workpiece clamping, with high versatility.

[0018] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the pneumatic zero-point clamp with tapered hole of this utility model;

[0020] Figure 2 This is an exploded view of the pneumatic zero-point clamp with tapered hole of this utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of the pneumatic zero-point clamp with tapered hole of this utility model;

[0022] Figure 4 This is an exploded view of a partial component of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10. Fixture base; 11. Airtight chamber; 12. Interface; 20. Piston; 21. Spring; 22. Cylindrical groove; 23. Wedge notch; 30. Pull pin lock cylinder; 31. Through hole; 32. Conical sleeve; 33. Movable cone block; 40. Sphere; 50. Pull pin; 51. Annular groove; 52. Mating part; 53. Annular sealing ring. Detailed Implementation

[0025] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this utility model.

[0027] Please see Figures 1 to 4 This embodiment provides a pneumatic zero-point clamp with a tapered hole, including a clamp base 10; the clamp base 10 has an airtight chamber 11 inside, and several pistons 20 are vertically arranged in the airtight chamber 11. The pistons 20 divide the airtight chamber 11 into an upper chamber and a lower chamber. The upper end face of the piston 20 abuts against the top of the upper chamber through several springs 21. The side wall of the clamp base 10 has an interface 12 that communicates with the lower chamber; a rivet locking cylinder 30 is vertically arranged downward on the upper end face of the clamp base 10. The rivet locking cylinder 30 is a cylinder with open ends. Several through holes 31 are distributed circumferentially along the peripheral wall of the rivet locking cylinder 30. A rivet 50 is detachably inserted into the rivet locking cylinder 30; the movable A cylindrical groove 22 is formed in the middle of the upper end face of the plug 20. The pull pin locking cylinder 30 extends into the interior of the cylindrical groove 22 and is spaced apart from the peripheral wall of the cylindrical groove 22. A ball 40 is provided between the cylindrical groove 22 and the through hole 31 of the pull pin locking cylinder 30. The side wall of the cylindrical groove 22 is recessed to form an annular wedge-shaped notch 23. The ball 40 abuts against the side wall of the wedge-shaped notch 23, and a part of the ball 40 extends out of the through hole 31 and locks the pull pin 50. When the pressure in the lower chamber increases, the piston 20 rises and drives the wedge-shaped notch 23 to rise so that the ball 40 exits the through hole 31 to release the pull pin 50. At the same time, the piston 20 pushes the pull pin 50 upward.

[0028] Specifically, in this embodiment, an annular groove 51 is formed on the outer peripheral wall of the pull stud 50. A portion of the sphere 40 extends out of the through hole 31 and can be inserted into the annular groove 51 to lock the pull stud 50. Alternatively, the sphere 40 can be withdrawn from the annular groove 51 to release the pull stud 50. Furthermore, in this embodiment, the wedge-shaped notch 23 is connected to the through hole 31. The width of the wedge-shaped notch 23 decreases from bottom to top, and the maximum width of the wedge-shaped notch 23 is smaller than the diameter of the sphere 40.

[0029] Furthermore, a tapered sleeve 32 is coaxially connected to the upper end of the rivet locking cylinder 30. The tapered sleeve 32 has an open-top and closed-bottom cylindrical structure, with its upper end face flush with the upper end face of the clamp base 10 and its lower end face abutting against the upper end face of the rivet locking cylinder 30. The inner diameter of the tapered sleeve 32 gradually decreases from top to bottom. Correspondingly, a mating portion 52 is provided on the outer periphery of the upper end of the rivet 50, which abuts against the inner wall of the tapered sleeve 32. Furthermore, a plurality of movable cone blocks 33 are movably disposed between the mating part 52 and the conical sleeve 32, and the plurality of movable cone blocks 33 together form a ring-shaped structure, and the plurality of movable cone blocks 33 are detachably disposed between the mating part 52 and the conical sleeve 32; in addition, an annular sealing ring 53 is provided at the bottom of the mating part 52, and the annular sealing ring 53 abuts against the plurality of movable cone blocks 33. Therefore, when the rivet 50 is assembled with the rivet locking cylinder 30, several movable cone blocks 33 are first fitted onto the outer peripheral wall of the rivet 50, so that the several movable cone blocks 33 abut against the annular sealing ring 53. Then, the lower end of the rivet 50 is inserted into the rivet locking cylinder 30, so that the annular groove 51 on the outer periphery of the rivet 50 cooperates with the ball 40. The piston 20 descends so that the wedge-shaped notch 23 of the piston 20 pushes the ball 40 out of the through hole 31 to lock the rivet 50. During this process, the outer periphery of the upper end of the rivet 50 abuts against the inner peripheral wall of several movable cone blocks 33 through the outer side of its mating part 52. When the plane of the upper end of the rivet 50 is flush with the upper end face of the clamp base 10, the movable cone blocks 33 of the rivet 50 will move downward under the elastic tension of the annular sealing ring 53 until they fit against the conical surface of the conical sleeve 32, forming zero gap, thereby realizing the self-centering positioning of the rivet 50. In other words, when the rivet 50 is in use, the upper surface of the rivet 50 is flush with the upper surface of the clamp base 10, and the lower surface of the rivet 50 abuts against the bottom of the cylindrical groove 22. In this way, the rivet 50 will not move downward, and the bottom surface of the clamp assembled with the rivet 50 is flush with the upper surface of the clamp base 10, thereby forming a tension force with the ball 40, which in turn causes the movable cone block 33 of the rivet 50 to move downward and adapt to the tapered sleeve 32 to achieve a zero-gap effect.

[0030] Therefore, this utility model provides an airtight chamber 11 in the clamp base 10 and a piston 20 in the airtight chamber 11. External equipment is used to supply or evacuate air to the interface 12 to control the pressure change in the lower chamber, thereby controlling the lifting and lowering movement of the piston 20. Furthermore, this utility model provides a rivet locking cylinder 30 on the clamp base 10. The piston 20 and the rivet locking cylinder 30 work together to drive a ball 40 through the through hole 31 into the rivet locking cylinder 30 and lock the rivet 50, or drive the ball 40 out of the through hole 31 to release the rivet 50. When it is necessary to lock the rivet 50, the rivet 50 is first inserted into the rivet locking cylinder 30, and air is evacuated from the lower chamber to cause the piston 20 to move downwards. At this time, the piston 20 causes the wedge-shaped notch 23 to descend. Because the upper end of the wedge-shaped notch 23 is narrower, it pushes the rivet 23 downwards. The ball 40 extends through the through hole 31 into the interior of the rivet locking cylinder 30, thus locking the rivet 50 through several balls 40. When the rivet 50 needs to be released, air is supplied to the lower chamber to cause the piston 20 to rise under pressure. At this time, the piston 20 drives the wedge notch 23 to rise, and the gradually widening characteristic of the lower end of the wedge notch 23 allows the ball 40 to exit from the through hole 31 into the rivet locking cylinder 30. At the same time, the piston 20 can also drive the rivet 50 to rise 2-3mm, so that the rivet 50 pushes the ball 40 out of the through hole 31, thereby freeing the rivet 50 from restraint. In other words, this utility model can release or lock the rivet 50 by inflating or deflating the interface 12. Therefore, the pneumatic zero-point clamp with tapered hole can achieve high-precision positioning and clamping, and can also quickly complete workpiece clamping, with high versatility.

[0031] Furthermore, in this embodiment, the upper end face of the clamp base 10 is recessed to form a recessed hole communicating with the upper chamber, and the pull pin locking cylinder 30 is disposed in the recessed hole. Further, the clamp base 10 has a plurality of mounting through holes 31 extending along the axial direction, and the plurality of mounting through holes 31 are used for assembly and fixation with the object being installed. Additionally, the clamp base 10 in this embodiment has a disc-shaped structure or a square-shaped structure.

[0032] The above-described embodiments are merely illustrative of several implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the pneumatic zero-point clamp with tapered hole of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A pneumatic zero-point clamp with a tapered hole, characterized in that: The fixture includes a clamp base; the clamp base has an airtight chamber inside, in which several pistons are vertically mounted, dividing the airtight chamber into an upper chamber and a lower chamber. The upper end face of the pistons abuts against the top of the upper chamber through several springs. The side wall of the clamp base has an interface communicating with the lower chamber. A rivet locking cylinder is vertically mounted downward on the upper end face of the clamp base. The rivet locking cylinder is a cylinder with open ends. Several through holes are distributed circumferentially on the peripheral wall of the rivet locking cylinder. A rivet is detachably inserted into the rivet locking cylinder. The upper end face of the piston has a recessed cylindrical groove in the middle. The pull pin locking cylinder extends into the interior of the cylindrical groove and is spaced apart from the peripheral wall of the cylindrical groove. A ball is disposed between the cylindrical groove and the through hole of the pull pin locking cylinder. The side wall of the cylindrical groove has a recessed annular wedge-shaped notch. The ball abuts against the side wall of the wedge-shaped notch, and a part of the ball extends out of the through hole and locks the pull pin. When the pressure in the lower chamber increases, the piston rises and drives the wedge-shaped notch to rise so that the ball exits the through hole to release the pull pin. At the same time, the piston pushes the pull pin upward.

2. The pneumatic zero-point clamp with tapered hole according to claim 1, characterized in that: An annular groove is formed on the outer peripheral wall of the rivet. A part of the ball can be inserted into the annular groove after extending out of the through hole to lock the rivet. Alternatively, the ball can be withdrawn from the annular groove to release the rivet.

3. The pneumatic zero-point clamp with tapered hole according to claim 1, characterized in that: The width of the wedge-shaped notch decreases from bottom to top, and the maximum width of the wedge-shaped notch is less than the diameter of the sphere.

4. The pneumatic zero-point clamp with tapered hole according to claim 3, characterized in that: The wedge-shaped notch is connected to the through hole.

5. The pneumatic zero-point clamp with tapered hole according to claim 1, characterized in that: The upper end face of the clamp base is recessed to form a concave hole that communicates with the upper chamber, and the pull pin locking cylinder is disposed in the concave hole.

6. The pneumatic zero-point clamp with tapered hole according to claim 1, characterized in that: The upper end of the rivet locking cylinder is coaxially connected to a tapered sleeve. The tapered sleeve is a cylindrical structure with openings at the top and bottom. The upper end face of the tapered sleeve is flush with the upper end face of the clamp base, and the lower end face of the tapered sleeve abuts against the upper end face of the rivet locking cylinder. The inner diameter of the tapered sleeve gradually decreases from top to bottom.

7. The pneumatic zero-point clamp with tapered hole according to claim 6, characterized in that: The upper outer periphery of the rivet is provided with a mating part that abuts against the inner wall of the tapered sleeve.

8. The pneumatic zero-point clamp with tapered hole according to claim 7, characterized in that: A plurality of movable cone blocks are movably disposed between the mating part and the conical sleeve, and the plurality of movable cone blocks together form a circular structure, and the plurality of movable cone blocks are detachably disposed between the mating part and the conical sleeve; an annular sealing ring is provided at the bottom of the mating part, and the annular sealing ring abuts against the plurality of movable cone blocks.

9. The pneumatic zero-point clamp with tapered hole according to claim 1, characterized in that: The fixture base has several through holes extending along the axial direction, which are used for assembling and fixing with the object being installed.

10. The pneumatic zero-point clamp with tapered hole according to claim 1, characterized in that: The clamp base has a disc-shaped structure or a square structure.

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