Zero-point quick-change clamp with conical sleeve

Abstract

The zero-point quick-change clamp comprises a clamp base, a plurality of positioning clamping holes are formed in the clamp base and penetrate through the upper end and the lower end of the clamp base, the conical sleeves and blind rivet clamping barrels are arranged in the positioning clamping holes at intervals in the vertical direction, and conical channels are formed in the middles of the conical sleeves and penetrate through the upper ends and the lower ends of the conical sleeves. The inner diameter of the conical channel is sequentially reduced from top to bottom, a pop-rivet channel is formed in the middle of the pop-rivet clamping cylinder and penetrates through the upper end and the lower end of the pop-rivet clamping cylinder, and a pop-rivet connector is arranged in the conical channel and the pop-rivet channel in a pluggable mode; a plurality of through holes are distributed in the inner circumferential wall of the blind rivet channel in the circumferential direction at intervals, balls with the same number as the through holes are movably arranged in the blind rivet clamping cylinder, and the balls can partially stretch out of the through holes or retreat from the through holes. According to the zero-point quick-change clamp with the conical sleeve, high-precision positioning and clamping can be achieved, workpiece clamping can be rapidly completed, and universality is high.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a zero-point quick-change clamp with a conical sleeve. Background Technology

[0002] In the conventional parts machining process, many products require multi-faceted machining, necessitating multiple clamping operations to complete each step. 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 zero-point quick-change fixture with a conical sleeve, 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 zero-point quick-change clamp with a conical sleeve includes a clamp base. The clamp base has several positioning holes extending through its upper and lower ends. Conical sleeves and rivet clamps are spaced apart along the vertical direction within each positioning hole. A conical channel is provided through the middle of the conical sleeve, extending through its upper and lower ends. The inner diameter of the conical channel decreases sequentially from top to bottom. A rivet channel is provided through the middle of the rivet clamp, extending through its upper and lower ends. The rivet channel and the conical channel are coaxially arranged, and rivet connectors are detachably provided in both the conical channel and the rivet channel. Several through holes are distributed circumferentially along the inner circumferential wall of the rivet channel. The rivet clamp has movably arranged spheres, the same number as the through holes, inside which the spheres can partially extend out of or retract from the through holes.

[0006] The outer peripheral wall of the rivet clamp is rotatably provided with a gear ring, and the clamp base is provided with a driving mechanism. The driving mechanism is meshed with the gear ring, and the driving mechanism is used to drive the gear ring to rotate and drive the ball to extend out of the through hole to lock the rivet joint or to withdraw from the through hole to release the rivet joint.

[0007] In one embodiment, the fixture base has a through groove extending along its horizontal center line, and the included angle base is provided with four positioning clamping holes. The four positioning clamping holes are distributed in a square interval, and each of the four positioning clamping holes is located on both sides of the through groove. The driving mechanism includes a driving screw and two driving sliders. The driving screw is rotatably disposed in the through groove, and the two driving sliders are respectively threaded in opposite directions to the outer peripheral wall of the driving screw. Each driving slider is meshed with an adjacent gear ring on both sides.

[0008] The drive screw is used to drive the two drive sliders to slide towards or away from each other in the through groove along the axial direction of the drive screw, so that the gear ring rotates and drives the ball to extend out of the through hole to lock the rivet joint or to exit from the through hole to release the rivet joint.

[0009] In one embodiment, the taper of the tapered channel is 30°.

[0010] In one embodiment, the lower end of the conical sleeve is recessed upward to form a conical groove, and the inner diameter of the conical groove decreases sequentially from bottom to top.

[0011] In one embodiment, a screw bearing for circumferential rotation of the drive screw is provided in the middle of the through groove, and the four positioning clamping holes are respectively connected to the through groove so that each drive slider can mesh with the gear ring in the adjacent positioning clamping hole; the outer peripheral wall of the drive screw is respectively provided with threaded segments with opposite thread directions, and the two threaded segments are symmetrically arranged with respect to the center of the drive screw, and the two drive sliders are respectively threadedly connected to the two threaded segments.

[0012] In one embodiment, drive racks are provided on both sides of the drive slider, and a number of arc teeth are evenly distributed on the outer peripheral wall of the gear ring. The drive slider is connected to the arc teeth of two adjacent gear rings by the drive racks on both sides.

[0013] In one embodiment, the two ends of the drive screw are respectively provided with hex wrench positions, and the fixture base is provided with a plurality of mounting holes for connecting with the machine tool.

[0014] In one embodiment, the gear ring is provided with arc-shaped grooves that communicate with the through holes. A sphere is movably disposed in each arc-shaped groove. The width of the arc-shaped groove at the end near the through hole gradually increases in the direction away from the through hole. When the gear ring rotates, the gear ring drives the sphere part to extend out of the through hole or retract from the through hole into the arc-shaped groove through the arc-shaped groove.

[0015] In one embodiment, an annular groove is formed on the outer peripheral wall of the rivet joint, and the middle part of the annular groove is inclined to both sides along the axial direction.

[0016] In one embodiment, the clamp base is a flat square structure or a flat disc structure.

[0017] Compared with traditional technologies, the advantages of the zero-point quick-change fixture with conical sleeve described in this utility model are:

[0018] This utility model's zero-point quick-change clamp utilizes several positioning holes on the angled base, with a tapered sleeve and a rivet clamp sequentially installed in each hole. The tapered sleeve has a 30° tapered channel in its center, ensuring that when the rivet is inserted, its outer diameter is slightly larger than the minimum inner diameter of the tapered channel. This allows the tapered sleeve to form an interference fit with the rivet, eliminating any gap between them after the rivet is locked in place by the rivet clamp and automatically correcting the rivet's center positioning. Furthermore, an annular groove is formed on the outer circumferential wall of the rivet to further enhance its positioning. When the annular groove of the rivet connector is inserted into the rivet channel of the rivet clamp, the drive screw drives the drive slider to slide, which in turn drives the gear ring to rotate, causing the balls to extend out of the through hole and embed into the annular groove of the rivet connector to lock the rivet connector. In this way, the rivet connector is locked by being pulled in with a uniform downward force, without lateral positioning force. It relies mainly on the tapered clamping between several balls and the annular groove to achieve precise positioning and locking. When it is necessary to release the rivet connector, simply reverse the movement of the drive slider to quickly move the balls out of the through hole to release the rivet connector. Therefore, the zero-point quick-change fixture with tapered sleeve according to this embodiment of the invention can achieve high-precision positioning and clamping, and can also quickly complete workpiece clamping, exhibiting high versatility.

[0019] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is one of the structural schematic diagrams of the zero-point quick-change fixture with a conical sleeve of this utility model;

[0021] Figure 2 This is the second structural schematic diagram of the zero-point quick-change fixture with a conical sleeve of this utility model;

[0022] Figure 3 for Figure 2 A schematic cross-sectional view along direction AA is shown.

[0023] Figure 4This is one of the exploded schematic diagrams of the zero-point quick-change fixture with a conical sleeve of this utility model;

[0024] Figure 5 This is the second exploded view of the zero-point quick-change fixture with a conical sleeve of this utility model;

[0025] Figure 6 This is a schematic diagram showing the connection between the drive mechanism and the rivet clamp of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the rivet clamp of this utility model;

[0027] Figure 8 This is the third structural schematic diagram of the zero-point quick-change fixture with a conical sleeve of this utility model;

[0028] Figure 9 This is the third exploded view of the zero-point quick-change fixture with a conical sleeve of this utility model.

[0029] Explanation of reference numerals in the attached drawings: 10, clamp base; 11, positioning clamp hole; 12, through groove; 20, tapered sleeve; 21, tapered channel; 22, tapered groove; 30, rivet clamp; 31, rivet channel; 32, through hole; 33, gear ring; 34, arc groove; 35, sphere; 36, arc tooth; 40, rivet connector; 41, annular groove; 50, drive screw; 51, threaded section; 52, internal hex wrench position; 60, drive slider; 61, drive rack. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] Please see Figures 1 to 9This embodiment provides a zero-point quick-change fixture with a conical sleeve 20, including a fixture base 10. The fixture base 10 has a plurality of positioning clamping holes 11 extending through its upper and lower ends. Conical sleeves 20 and rivet clamps 30 are spaced apart along the vertical direction within each positioning clamping hole 11. A conical channel 21 is provided through the middle of the conical sleeve 20 extending through its upper and lower ends. The inner diameter of the conical channel 21 decreases sequentially from top to bottom. A rivet channel 31 is provided through the middle of the rivet clamp 30 extending through its upper and lower ends. The rivet channel 31 is coaxially arranged with the conical channel 21, and rivet connectors 40 are detachably provided in both the conical channel 21 and the rivet channel 31. The inner circumferential wall of the rivet channel 31 is provided with a plurality of through holes 32 distributed at intervals along the circumferential direction. The rivet clamp 30 is provided with a number of spheres 35 in the same number as the through holes 32. The spheres 35 can extend out of the through holes 32 or exit from the through holes 32. The outer circumferential wall of the rivet clamp 30 is rotatably provided with a gear ring 33. The clamp base 10 is provided with a driving mechanism. The driving mechanism is meshed with the gear ring 33 and is used to drive the gear ring 33 to rotate and drive the spheres 35 to extend out of the through holes 32 to lock the rivet joint 40 or to exit from the through holes 32 to release the rivet joint 40.

[0033] Specifically, in this embodiment, the clamp base 10 has a through groove 12 extending along its horizontal center line. The included angle base is provided with four positioning clamping holes 11, which are distributed in a square interval and are located in pairs on both sides of the through groove 12. The driving mechanism includes a driving screw 50 and two driving sliders 60. The driving screw 50 is rotatably disposed in the through groove 12. The two driving sliders 60 are respectively threaded in opposite directions to the outer peripheral wall of the driving screw 50. The two sides of each driving slider 60 are respectively meshed with the adjacent gear ring 33. The driving screw 50 is used to drive the two driving sliders 60 to slide towards or away from each other in the through groove 12 along the axial direction of the driving screw 50, so that the gear ring 33 rotates and drives the ball 35 to extend out of the through hole 32 to lock the rivet joint 40 or to exit from the through hole 32 to release the rivet joint 40.

[0034] In other words, the fixture base 10 of this embodiment is provided with four positioning clamping holes 11, and the angled base is provided with through grooves 12 for the drive screw 50 to rotate circumferentially and for the two drive sliders 60 to slide axially. By connecting the through grooves 12 to the four positioning clamping holes 11 respectively, a gear ring 33 can be meshed with both sides of each drive slider 60. In this way, when the drive screw 50 is driven by the user to rotate circumferentially, the drive screw 50 can drive the two drive sliders 60 to slide towards or away from each other, thereby enabling the gear rings 33 in the four positioning clamping holes 11 to rotate and enabling the ball 35 in each rivet clamp 30 to extend out of the through hole 32 or retract from the through hole 32, thereby achieving the locking or releasing of the rivet joint 40.

[0035] In this embodiment, the tapered channel 21 has a taper of 30°; the lower end of the tapered sleeve 20 is recessed upwards to form a tapered groove 22, and the inner diameter of the tapered groove 22 decreases sequentially from bottom to top. Thus, by providing a tapered channel 21 with a 30° taper in its center, this embodiment ensures that when the rivet connector 40 is inserted into the tapered channel 21, the outer diameter of the rivet connector 40 is slightly larger than the minimum inner diameter of the tapered channel 21. This allows the tapered sleeve 20 to form an interference fit with the rivet connector 40, eliminating the gap between the tapered sleeve 20 and the rivet connector 40 after the rivet connector 40 is locked by the rivet clamp 30, and automatically correcting the center positioning of the rivet connector 40.

[0036] In this embodiment, a screw bearing for circumferential rotation of the drive screw 50 is provided in the middle of the through groove 12. Four positioning clamping holes 11 are respectively connected to the through groove 12, so that each drive slider 60 can mesh with the gear ring 33 in the adjacent positioning clamping hole 11. The outer peripheral wall of the drive screw 50 is provided with threaded sections 51 in opposite directions. Two threaded sections 51 are symmetrically arranged with respect to the center of the drive screw 50, and the two drive sliders 60 are threadedly connected to the two threaded sections 51 respectively. Furthermore, drive racks 61 are provided on both sides of the drive slider 60, and a plurality of arc teeth 36 are evenly distributed on the outer peripheral wall of the gear ring 33. The drive slider 60 meshes with the arc teeth 36 of two adjacent gear rings 33 through the drive racks 61 on both sides.

[0037] Furthermore, the gear ring 33 is provided with arc-shaped grooves 34 that communicate with the through holes 32. Each arc-shaped groove 34 is movably disposed in the ball 35. The width of the arc-shaped groove 34 at the end near the through hole 32 gradually increases in the direction away from the through hole 32. When the gear ring 33 rotates, the gear ring 33 drives the ball 35 to partially extend out of the through hole 32 or retract from the through hole 32 into the arc-shaped groove 34 through the arc-shaped groove 34.

[0038] In this embodiment, the two ends of the drive screw 50 are respectively provided with hexagonal wrench positions 52, and the fixture base 10 is provided with a plurality of mounting holes for connection with the machine tool. In addition, an annular groove 41 is recessed on the outer peripheral wall of the pull stud joint 40, and the middle part of the annular groove 41 is inclined to both sides along the axial direction.

[0039] Therefore, the zero-point quick-change fixture of this utility model has several positioning clamping holes 11 set on the angled base, and a conical sleeve 20 and a rivet clamp 30 are sequentially set in each positioning clamping hole 11. The conical sleeve 20 has a conical channel 21 with a taper of 30° in its middle, so that when the rivet connector 40 is inserted into the conical channel 21, the outer diameter of the rivet connector 40 is slightly larger than the minimum inner diameter of the conical channel 21. This allows the conical sleeve 20 to form an interference fit with the rivet connector 40, so that after the rivet connector 40 is locked by the rivet clamp 30, the gap between the conical sleeve 20 and the rivet connector 40 can be eliminated, and the center positioning of the rivet connector 40 can be automatically corrected. In addition, by forming an annular groove 41 on the outer peripheral wall of the rivet connector 40, the gap between the conical sleeve 20 and the rivet connector 40 can be eliminated, and the center positioning of the rivet connector 40 can be automatically corrected. When the annular groove 41 of the rivet connector 40 is inserted into the rivet channel 31 of the rivet clamp 30, the drive screw 50 drives the drive slider 60 to slide, which in turn drives the gear ring 33 to rotate and causes the balls 35 to extend out of the through hole 32 and embed into the annular groove 41 of the rivet connector 40 to lock the rivet connector 40. In this way, the rivet connector 40 is locked by being pulled in by a uniform downward force, without any lateral positioning force. It mainly relies on the tapered clamping between several balls 35 and the annular groove 41 to achieve precise positioning and locking. When it is necessary to release the rivet connector 40, simply drive the drive slider 60 in the opposite direction to quickly drive several balls 35 out of the through hole 32 to release the rivet connector 40. Therefore, the zero-point quick-change fixture with tapered sleeve 20 according to the embodiment of this utility model can achieve high-precision positioning and clamping, and can also quickly complete workpiece clamping, with high versatility.

[0040] 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 zero-point quick-change fixture with a conical sleeve 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 zero-point quick-change fixture with a conical sleeve, characterized in that: The fixture includes a clamp base with several positioning holes extending through its upper and lower ends. Conical sleeves and rivet clamps are spaced apart along the vertical direction within each positioning hole. A conical channel is provided through the middle of the conical sleeve, extending through its upper and lower ends. The inner diameter of the conical channel decreases from top to bottom. A rivet channel is provided through the middle of the rivet clamp, extending through its upper and lower ends. The rivet channel and the conical channel are coaxially arranged, and rivet connectors are detachably provided in both the conical channel and the rivet channel. Several through holes are distributed circumferentially along the inner wall of the rivet channel. The rivet clamp contains movably arranged spheres, the same number as the through holes, which can partially extend out of or retract from the through holes. The outer peripheral wall of the rivet clamp is rotatably provided with a gear ring, and the clamp base is provided with a driving mechanism. The driving mechanism is meshed with the gear ring, and the driving mechanism is used to drive the gear ring to rotate and drive the ball to extend out of the through hole to lock the rivet joint or to withdraw from the through hole to release the rivet joint.

2. The zero-point quick-change fixture with a conical sleeve according to claim 1, characterized in that: The fixture base has a through slot along its horizontal center line. The fixture base has four positioning holes, which are distributed in a square interval and are located in pairs on both sides of the through slot. The driving mechanism includes a driving screw and two driving sliders. The driving screw is rotatably disposed in the through slot. The two driving sliders are respectively threaded in opposite directions to the outer peripheral wall of the driving screw. Each driving slider is meshed with an adjacent gear ring on both sides. The drive screw is used to drive the two drive sliders to slide towards or away from each other in the through groove along the axial direction of the drive screw, so that the gear ring rotates and drives the ball to extend out of the through hole to lock the rivet joint or to exit from the through hole to release the rivet joint.

3. The zero-point quick-change fixture with a conical sleeve according to claim 1, characterized in that: The tapered channel has a taper of 30°.

4. The zero-point quick-change fixture with a conical sleeve according to claim 1, characterized in that: The lower end of the conical sleeve is recessed upward to form a conical groove, and the inner diameter of the conical groove decreases sequentially from bottom to top.

5. The zero-point quick-change fixture with a conical sleeve according to claim 2, characterized in that: A screw bearing for circumferential rotation of the drive screw is provided in the middle of the through groove. The four positioning clamping holes are respectively connected to the through groove so that each drive slider can mesh with the gear ring in the adjacent positioning clamping hole. The outer peripheral wall of the drive screw is respectively provided with threaded sections with opposite thread directions. The two threaded sections are symmetrically arranged with respect to the center of the drive screw. The two drive sliders are respectively threadedly connected to the two threaded sections.

6. The zero-point quick-change fixture with a conical sleeve according to claim 5, characterized in that: The drive slider is provided with drive racks on both sides, and a number of arc teeth are evenly distributed on the outer peripheral wall of the gear ring. The drive slider is connected to the arc teeth of two adjacent gear rings by the drive racks on both sides.

7. The zero-point quick-change fixture with a conical sleeve according to claim 1, characterized in that: The drive screw has hex wrench positions at both ends, and the fixture base has several mounting holes for connecting to the machine tool.

8. The zero-point quick-change fixture with a conical sleeve according to claim 1, characterized in that: The gear ring has arc-shaped grooves that communicate with the through holes. Each arc-shaped groove contains a movably disposed ball. The width of the arc-shaped groove at the end near the through hole gradually increases in the direction away from the through hole. When the gear ring rotates, the gear ring drives the ball part to extend out of the through hole or retract into the arc-shaped groove through the arc-shaped groove.

9. The zero-point quick-change fixture with a conical sleeve according to claim 8, characterized in that: The outer peripheral wall of the rivet joint is recessed to form an annular groove, and the middle part of the annular groove is inclined to both sides along the axial direction.

10. The zero-point quick-change fixture with a conical sleeve according to claim 1, characterized in that: The clamp base is a flat, square structure or a flat, disc-shaped structure.

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