Double acting centering fixture

Abstract

The utility model discloses a double-acting centering fixture, including a chuck, a first slide groove is provided on one side of the outer surface of the chuck, a slider is slidably connected inside the first slide groove, a seat is movably connected to the middle of the inner side surface of the chuck, the seat is slidably connected to the slider, and a T-block is clamped on the top of the inner side surface of the slider. The double-acting centering fixture, through the arrangement of the slider, the seat, the claw, the cushion block, the connecting seat, the support arm, the clamping claw and the support seat, under the action of the double-push rod rotating cylinder, the slider slides inside the first slide groove, the cushion block tightens the workpiece, the claw supports one side of the workpiece in a limited position, and the connecting seat moves under the action of the double-push rod rotating cylinder, so that the support arm drives the clamping claw to clamp the other side of the workpiece to prevent it from falling off, and can realize synchronous movement between various clamping structures, improve the clamping efficiency and clamping accuracy of the workpiece, meet the clamping requirements of workpieces of different diameters, and improve the applicability of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a double-action centering clamp. Background Art

[0002] With the development of science and technology, the demand for round hole workpieces is increasing. Traditional manual or semi-automatic operation methods cannot meet the needs of today's scientific and technological development. In the processing of round hole workpiece parts, the stability of the workpiece positioning and the degree of deformation during the workpiece clamping process determine the precision machining accuracy of the parts.

[0003] After searching, Chinese patent publication (announcement) No. CN214023545U discloses a four-jaw self-centering hydraulic clamp for a vertical lathe, including a chuck body, four slides, four jaws, a jaw drive device I and a jaw drive device II. The four slides are arranged in a cross shape. When the jaw drive device I is in motion, the two jaws at the upper and lower ends are driven to move synchronously outward or inward relative to each other. When the jaw drive device II is in motion, the two jaws at the left and right ends are driven to move synchronously outward or inward relative to each other. When the four jaws move synchronously inward, the workpiece can be clamped. Since the four jaws move synchronously, the workpiece is automatically centering and clamping, and can clamp square or rectangular workpieces, thereby improving the clamping efficiency and clamping accuracy of the workpiece, thereby improving the processing accuracy of the workpiece during vertical lathe operation.

[0004] Although the fixture of the above patent can clamp the workpiece, its fixing effect on the circular hole workpiece is general. The circular hole workpiece is prone to shaking or even falling off during the processing, which makes it easy to produce errors during the processing of the circular hole workpiece and affects the quality of the workpiece processing. Therefore, it is necessary to design a double-acting centering fixture to solve the above problem. Utility Model Content

[0005] The main purpose of the utility model is to provide a double-action centering clamp, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The top of described sliding panel also is provided with an interlocking structure, and the interlocking structure is hinged on the base plate, is fixed with a backing pin on the interlocking structure, and an end of sliding panel withstands on the backing pin of interlocking structure.

[0008] In order to facilitate the support of the workpiece, as the double-acting centering fixture of the utility model, a push pin is fixedly connected to the middle of the outer surface of the support seat.

[0009] In order to achieve the effect of enhancing the accuracy of sliding movement, as a double-acting centering fixture of the utility model, a guide groove is provided on the outer surface of the base, and second sliding grooves are provided on both sides of the outer surface of the slider.

[0010] In order to achieve the effect of strengthening the connection stability between the claw and the pad, as a double-acting centering clamp of the utility model, the upper surface of the slider and the lower surface of the claw are both provided with limiting grooves, and a groove is provided on one side of the upper surface of the claw, and the groove is slidably connected to the pad.

[0011] In order to achieve the effect of easy driving, as a double-acting centering fixture of the utility model, the internal movably connected to the connecting seat is a solid cylinder connecting rod, and one end of the solid cylinder connecting rod is fixedly connected to a double-push rod rotating cylinder.

[0012] In order to facilitate the fixing of the connecting seat, as a double-acting centering fixture of the utility model, a gasket is provided on the side of the outer surface of the solid cylinder connecting rod close to the connecting seat, and a nut is threadedly connected on the side of the outer surface of the solid cylinder connecting rod close to the gasket.

[0013] In order to facilitate the connection of the card seat, the double-acting centering clamp of the utility model is used. The outer surface of the double-push rod rotating cylinder is fixedly connected to the cylinder seat, and one side of the outer surface of the cylinder seat is fixedly connected to the empty rotating cylinder rod, and one end of the empty rotating cylinder rod is fixedly connected to the card seat.

[0014] In order to facilitate the connection of the chuck, the double-acting centering fixture of the utility model has a shaft movably connected to one end of the cylinder seat, a tapered sleeve is provided on one side of the outer surface of the shaft, a pulley is clamped on the outer surface of the tapered sleeve, and the pulley is movably connected to the cylinder seat by bolts.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the utility model, through the arrangement of the slider, the clamping seat, the clamping claw, the pad, the connecting seat, the support arm, the clamping claw and the support seat, under the action of the double-push rod rotating cylinder, the slider slides inside the first slide groove, the pad tightens the workpiece, the clamping claw provides limited support to one side of the workpiece, and at the same time the connecting seat moves under the action of the double-push rod rotating cylinder, so that the support arm drives the clamping claw to clamp the other side of the workpiece to prevent it from falling off, and can realize synchronous movement between the various clamping structures, thereby improving the clamping efficiency and clamping accuracy of the workpiece, meeting the clamping requirements of workpieces of different diameters, and improving the applicability of the equipment.

[0017] 2. In the utility model, through the arrangement of the ejector pin, the guide groove, the second slide groove and the double-push rod rotary cylinder, the ejector pin contacts the inner side surface of the workpiece, so that the clamping claw has a buffer space when pressing the workpiece to avoid damage to the workpiece. The guide groove can guide the movement of the slider and the clamping claw, and the movement is more stable. The second slide groove is connected to the protrusion on the surface of the first slide groove, further enhancing the accuracy of the slider splicing and avoiding offset during movement. The double-push rod rotary cylinder adopts a double-push rod rotary cylinder combination cylinder, which can realize different control methods of the inner and outer rods, facilitate programming, and realize automatic operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic cross-sectional plan view of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the pressing claws according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the claw structure of an embodiment of the utility model.

[0023] In the figure: 1. chuck; 2. first slide; 3. slider; 4. clamping seat; 5. T-block; 6. clamping claw; 7. spacer; 8. connecting seat; 9. support arm; 10. clamping claw; 11. support seat; 12. ejector pin; 13. guide groove; 14. second slide; 15. limit groove; 16. clamping slot; 17. connecting rod of solid cylinder; 18. double push rod rotary cylinder; 19. gasket; 20. nut; 21. cylinder seat; 22. hollow rotary cylinder rod; 23. shaft; 24. taper sleeve; 25. pulley. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0025] like Figure 1-5 As shown, the double-acting centering fixture includes a chuck 1, a first slide groove 2 is opened on one side of the outer surface of the chuck 1, and a slider 3 is slidably connected inside the first slide groove 2. The middle part of the inner side surface of the chuck 1 is movably connected with a clamping seat 4, and the clamping seat 4 is slidably connected to the slider 3. The top of the inner side surface of the slider 3 is clamped with a T-block 5, and the upper surface of the T-block 5 is movably connected with a clamping claw 6 by a bolt, and the outer surface of the clamping claw 6 is movably connected with a pad 7 by a bolt; the middle part of the inner side surface of the chuck 1 is movably connected with a connecting seat 8, and the outer surface of the connecting seat 8 is evenly distributed with support seats 11. There are three support seats 11, and the three support seats 11 are evenly distributed on the outer surface of the connecting seat 8 in the form of a circumferential array. The middle part of the outer surface of the support seat 11 is hinged with a clamping claw 10, and both sides of the outer surface of the clamping claw 10 are hinged with support arms 9. One end of the support arm 9 is hinged to the seat 8, and the support seat 11 is movably connected to the chuck 1 by bolts.

[0026] When in use, through the arrangement of the slider 3, the base 4, the claw 6, the pad 7, the connecting seat 8, the support arm 9, the clamping claw 10 and the support seat 11, the slider 3 is slidably connected to the inside of the first slide groove 2 and is connected to the base 4 at the same time. The T-block 5 is clamped on the top of the inner side of the slider 3, and then the claw 6 is fixed to the upper surface of the slider 3 by bolts. One end of the pad 7 is clamped on the top of the outer surface of the claw 6, and the two are fixed by bolts. The other end is an arc-shaped structure, which can better fit the circular workpiece. One end of the support arm 9 is hinged to the connecting seat 8, and the other end is hinged to the clamping claw 10. At the same time, one side of the outer surface of the clamping claw 10 is swing-supported by the support seat 11 When positioning the workpiece, under the action of the double-push rod rotating cylinder 18, the slider 3 slides inside the first slide groove 2, the pad 7 contacts the inner side of the workpiece, tightens the workpiece, and the clamping claw 6 supports one side of the workpiece. At the same time, the connecting seat 8 moves under the action of the double-push rod rotating cylinder 18, so that the support arm 9 drives the clamping claw 10 to rotate with the connection between the support seat 11 and the clamping claw 10 as the center of the circle, and clamps the other side of the workpiece to prevent it from falling off. It can realize synchronous movement between the various clamping structures, improve the clamping efficiency and clamping accuracy of the workpiece, ensure the quality of round hole workpiece processing, meet the clamping requirements of workpieces of different diameters, and improve the applicability of the equipment.

[0027] In this embodiment, a lift pin 12 is fixedly connected to the middle portion of the outer surface of the support base 11 .

[0028] During specific use, the ejector pin 12 is fixed to the outer surface of the support seat 11 and contacts the inner side of the workpiece, so that the clamping claw 10 has a buffer space when pressing the workpiece to avoid damage to the workpiece.

[0029] In this embodiment, a guide groove 13 is formed on the outer surface of the holder 4 , and second sliding grooves 14 are formed on both sides of the outer surface of the slider 3 .

[0030] During specific use, through the setting of the guide groove 13 and the second slide groove 14, the guide groove 13 can guide the movement of the slider 3 and the claw 6, and the movement is more stable. When the slider 3 is clamped inside the first slide groove 2, the second slide groove 14 on its outer surface is connected to the protrusion on the surface of the first slide groove 2, further enhancing the accuracy of the splicing of the two and avoiding displacement during movement.

[0031] In this embodiment, the upper surface of the slider 3 and the lower surface of the claw 6 are both provided with a limiting groove 15 , and one side of the upper surface of the claw 6 is provided with a clamping groove 16 , which is slidably connected to the pad 7 .

[0032] During specific use, through the setting of the limit groove 15 and the clamping groove 16, when the claw 6 is installed on the upper surface of the slider 3, the limit grooves 15 on the two surfaces are engaged with each other, thereby ensuring the stability of the claw 6 during installation and avoiding sliding. One end of the pad 7 is engaged with the inside of the clamping groove 16, making the pad 7 more stable when connected to the claw 6 and less likely to cause installation shaking.

[0033] In this embodiment, a solid cylinder connecting rod 17 is movably connected inside the connecting seat 8 , and one end of the solid cylinder connecting rod 17 is fixedly connected to a double-push rod rotary cylinder 18 .

[0034] During specific use, through the setting of the double-push-rod rotary cylinder 18, one end of the solid cylinder connecting rod 17 is connected to the output end of the double-push-rod rotary cylinder 18, and the other end is connected to the connecting seat 8. Under the action of the double-push-rod rotary cylinder 18, the solid cylinder connecting rod 17 can drive the connecting seat 8 to move, thereby performing the tightening and loosening of the workpiece. The double-push-rod rotary cylinder 18 adopts a double-push-rod rotary cylinder combination cylinder, which can realize different control methods of the inner and outer rods, facilitate programming, and realize automatic operation.

[0035] In this embodiment, a gasket 19 is sleeved on the side of the outer surface of the solid cylinder connecting rod 17 close to the connecting seat 8 , and a nut 20 is threadedly connected to the side of the outer surface of the solid cylinder connecting rod 17 close to the gasket 19 .

[0036] During specific use, through the setting of gasket 19 and nut 20, the connecting seat 8 is clamped on one side of the outer surface of the solid cylinder connecting rod 17, and the nut 20 installs and fixes the connecting seat 8 through the gasket 19, making installation and disassembly more convenient, and easy to replace and maintain when damaged, saving costs. The gasket 19 increases the firmness of the installation of the nut 20, so that the stability of the connecting seat 8 is enhanced during use.

[0037] In this embodiment, the outer surface of the double-push rod rotary cylinder 18 is fixedly connected to a cylinder seat 21 , one side of the outer surface of the cylinder seat 21 is fixedly connected to a hollow rotary cylinder rod 22 , and one end of the hollow rotary cylinder rod 22 is fixedly connected to the holder 4 .

[0038] During specific use, through the setting of the empty rotating cylinder rod 22, one end of the empty rotating cylinder rod 22 is connected to the cylinder seat 21, and the other end is connected to the clamping seat 4. Under the action of the empty rotating cylinder rod 22, the movement of the clamping seat 4 can be controlled, thereby indirectly driving the clamping claw 6 to work and realize automatic operation.

[0039] In this embodiment, one end of the cylinder base 21 is movably connected to a shaft 23, a tapered sleeve 24 is sleeved on one side of the outer surface of the shaft 23, a pulley 25 is clamped on the outer surface of the tapered sleeve 24, and the pulley 25 is movably connected to the cylinder base 21 by bolts.

[0040] During specific use, through the setting of the shaft 23, one end of the shaft 23 is sleeved on the outer surface of the cylinder seat 21, and the other end is fixed to the chuck 1 by bolts. The tapered sleeve 24 is sleeved on the outer surface of the shaft 23, and the pulley 25 is fixed to the outer surface of the cylinder seat 21 by bolts. Under the action of the pulley 25, the tapered sleeve 24 contracts inward, thereby fixing the shaft 23. The shaft 23 can block the solid cylinder connecting rod 17 and the hollow rotating cylinder rod 22, and at the same time play the role of connecting the chuck 1.

[0041] Working principle: During use, the slider 3 is slidably connected to the inside of the first slide groove 2 and connected to the card seat 4 at the same time, the T-block 5 is clamped on the top of the inner side of the slider 3, and then the claw 6 is fixed to the upper surface of the slider 3 by bolts. The limit grooves 15 on the surfaces of the two are clamped and matched with each other. One end of the pad 7 is clamped in the inside of the card slot 16 and fixed by bolts. One end of the solid cylinder connecting rod 17 is connected to the output end of the double push rod rotating cylinder 18, and the other end is connected to the connecting seat 8. The nut 20 fixes the connecting seat 8 through the gasket 19. One end of the empty rotating cylinder rod 22 is connected to the cylinder seat 21, and the other end is connected to the card seat 4. One end of the shaft 23 is sleeved on the outer surface of the cylinder seat 21, and the other end is fixed to the chuck 1 by bolts. The tapered sleeve 24 is sleeved on the outer surface of the shaft 23, and the pulley 25 is fixed by bolts. Fixed on the outer surface of the cylinder seat 21, under the action of the pulley 25, the tapered sleeve 24 contracts inward, thereby fixing the shaft 23. When positioning the workpiece, under the action of the double-push-rod rotating cylinder 18, the empty rotating cylinder rod 22 moves the holder 4, and the holder 4 drives the slider 3 to slide inside the first slide 2. The pad 7 contacts the inner side of the workpiece to tighten the workpiece, and the clamping claw 6 provides limited support to one side of the workpiece. At the same time, the connecting seat 8 moves under the action of the double-push-rod rotating cylinder 18 and the solid cylinder connecting rod 17, so that the support arm 9 drives the clamping claw 10 to rotate with the connection between the support seat 11 and the clamping claw 10 as the center of the circle, and clamps the other side of the workpiece to prevent it from falling off. The ejector pin 12 provides a buffer space for the clamping claw 10 when pressing the workpiece, thereby avoiding damage to the workpiece and realizing automated operation.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A double-acting centering fixture, comprising a chuck (1), characterized in that: A first slide groove (2) is provided on one side of the outer surface of the chuck (1), a slider (3) is slidably connected inside the first slide groove (2), a clamping seat (4) is movably connected to the middle of the inner side surface of the chuck (1), the clamping seat (4) is slidably connected to the slider (3), a T-shaped block (5) is clamped on the top of the inner side surface of the slider (3), a clamping claw (6) is movably connected to the upper surface of the T-shaped block (5) via bolts, and a cushion block (7) is movably connected to the outer surface of the clamping claw (6) via bolts; A connecting seat (8) is movably connected to the middle of the inner side surface of the chuck (1), and support seats (11) are evenly distributed on the outer surface of the connecting seat (8). The number of the support seats (11) is three, and the three support seats (11) are evenly distributed on the outer surface of the connecting seat (8) in the form of a circular array. A clamping claw (10) is hingedly connected to the middle of the outer surface of the support seat (11), and support arms (9) are hingedly connected to both sides of the outer surface of the clamping claw (10). One end of the support arm (9) is hingedly connected to the seat (8), and the support seat (11) is movably connected to the chuck (1) via bolts.

2. The double-acting centering fixture according to claim 1, characterized in that: A lift pin (12) is fixedly connected to the middle portion of the outer surface of the support seat (11).

3. The double-acting centering fixture according to claim 1, characterized in that: The outer surface of the clamping seat (4) is provided with a guide groove (13), and the outer surface of the sliding block (3) is provided with a second sliding groove (14) on both sides.

4. The double-acting centering fixture according to claim 1, characterized in that: The upper surface of the slider (3) and the lower surface of the claw (6) are both provided with a limiting groove (15), and one side of the upper surface of the claw (6) is provided with a clamping groove (16), and the clamping groove (16) is slidably connected to the cushion block (7).

5. The double-acting centering fixture according to claim 1, characterized in that: A solid cylinder connecting rod (17) is movably connected inside the connecting seat (8), and one end of the solid cylinder connecting rod (17) is fixedly connected to a double-push rod rotary cylinder (18).

6. The double-acting centering fixture according to claim 5, characterized in that: A gasket (19) is sleeved on one side of the outer surface of the solid cylinder connecting rod (17) close to the connecting seat (8), and a nut (20) is threadedly connected on one side of the outer surface of the solid cylinder connecting rod (17) close to the gasket (19).

7. The double-acting centering fixture according to claim 5, characterized in that: The outer surface of the double-push rod rotary cylinder (18) is fixedly connected to a cylinder seat (21), one side of the outer surface of the cylinder seat (21) is fixedly connected to a hollow rotary cylinder rod (22), and one end of the hollow rotary cylinder rod (22) is fixedly connected to the clamping seat (4).

8. The double-acting centering fixture according to claim 7, characterized in that: One end of the cylinder seat (21) is movably connected to a shaft (23), one side of the outer surface of the shaft (23) is sleeved with a tapered sleeve (24), the outer surface of the tapered sleeve (24) is clamped with a pulley (25), and the pulley (25) is movably connected to the cylinder seat (21) via bolts.

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