Universal integrated pneumatic chuck of slitting machine

Abstract

The utility model discloses a universal integrated inflation chuck of slitting machine, which aims at solving the problem that the existing inflation chuck is only suitable for the expansion and fixation of a size specification paper core and has poor universality. The invention comprises a chuck body, a plurality of clamping segments arranged on the chuck body and sequentially decreasing along the axial outer diameter, all the clamping segments together forming a stepped shaft structure, an axially movable piston installed in the chuck body, a plurality of radially movable clamping bodies installed on the clamping segments, an inclined push surface corresponding to the clamping bodies arranged on the outer wall of the piston, an inclined abutting surface arranged on the clamping bodies, the push surface and the abutting surface being in close contact, and the piston axially moving to drive the clamping bodies to move radially. The inflation chuck of the patent application is universally applicable to the clamping of paper cores of various size specifications, and the chuck does not need to be disassembled and replaced during clamping, which is convenient to operate and has good effect on the expansion and fixation of the paper core.

Description

Technical Field

[0001] This invention relates to a clamping mechanism, and more specifically, to a universal one-piece inflatable chuck for a slitting machine. Background Technology

[0002] Inflatable chucks are mainly used for tensioning and fixing the unwinding paper core in slitting machines. They are used in pairs, left and right. The common design on the market is a 3-inch or 6-inch individual chuck. In actual use, it is necessary to switch frequently, removing one type of chuck to replace another. The chucks are very heavy and consume a lot of physical strength. Moreover, frequent disassembly and reassembly can cause wear on the ends of the chucks, affecting accuracy. There are also structures on the market that nest a 6-inch chuck in a 3-inch chuck. When using the 3-inch chuck, the nested 6-inch chuck must be removed, which is also inconvenient. In addition, the nested structure is prone to slippage when the unwinding tension is high, causing wear on the paper core. Summary of the Invention

[0003] To overcome the above shortcomings, the present invention provides a universal integrated air-filled chuck for a slitting machine, which is applicable to the clamping of paper cores of various sizes and specifications. The chuck does not need to be disassembled or replaced during clamping, making it easy to operate and providing good tension and fixation effect for the paper core.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a universal integrated pneumatic chuck for a slitting machine, comprising a chuck body, wherein a plurality of clamping sections are provided on the chuck body, the clamping sections together forming a stepped shaft-like structure, an axially movable piston is installed inside the chuck body, a plurality of radially movable clamping bodies are installed on the clamping sections, an inclined pushing surface is provided on the outer wall of the piston corresponding to the clamping bodies, an inclined abutting surface is provided on the clamping bodies, the pushing surface and the abutting surface are in contact, and the axial movement of the piston drives the clamping bodies to move radially.

[0005] When the paper core is tensioned and fixed, the end of the paper core is fitted onto the matching clamping section. Then, the piston moves axially, and through the force of the contact surface between the pushing surface and the abutting surface, the clamping body moves radially outward, thereby tensioning and fixing the paper core against the inner wall. Because several clamping sections with different outer diameters are provided, different clamping sections can achieve tensioning and fixing of paper cores of different sizes and specifications, thus the pneumatic chuck has good versatility.

[0006] The inflatable clamp of this patent application is applicable to the clamping of paper cores of various sizes and specifications. The clamp does not need to be disassembled or replaced during clamping, making it easy to operate and providing a good tensioning and fixing effect on the paper core.

[0007] Preferably, an air chamber is provided on one side of the piston inside the chuck body, and a return spring is installed on the other side of the piston.

[0008] Inflate the inflation chamber to increase the air pressure, which in turn pushes the piston toward the return spring side, thereby pushing the clamping body radially outward, ensuring a smooth and reliable operation.

[0009] Preferably, a T-shaped connecting strip is provided on the pushing surface, and a T-shaped connecting groove is provided on the abutting surface. The connecting strip and the connecting groove are adapted to each other and the connecting strip can slide along the connecting groove.

[0010] The T-shaped connecting strip and the T-shaped connecting groove enable the piston to push and pull the clamping body. When pushing, the clamping body is pushed radially outward to tighten the paper core. When pulling, the clamping body is pulled radially inward to disengage the clamping body from the inner wall of the paper core.

[0011] Preferably, the clamping body includes a slider and an expansion key, the expansion key being fastened to the slider, and the abutment surface being disposed on the slider.

[0012] The slider and expansion key are connected to form a clamping body, which is easy to install onto the chuck body.

[0013] Preferably, a rubber pad is attached to the outer surface of the clamping body.

[0014] The addition of rubber pads can improve the reliability of paper core tension.

[0015] Preferably, a piston chamber is provided inside the chuck body, the piston has a stepped shaft structure, the piston is adapted to the piston chamber, and a return spring is installed between the inner wall of the piston chamber and the piston stepped surface.

[0016] The piston moves smoothly and reliably within the piston chamber, and the return spring abuts against the stepped surface, making installation convenient.

[0017] Preferably, a front cover and a rear cover are installed at both ends of the chuck body, and an air port is provided on the rear cover, which is connected to the air chamber.

[0018] The air inlet is designed to facilitate airflow into the inflation chamber.

[0019] Preferably, a flange is provided at the rear end of the chuck body.

[0020] The flange design facilitates the installation of the inflation clamp onto the equipment.

[0021] Preferably, the rear end of the chuck body is connected to a mounting base, and the rear end of the chuck body is movably connected to the mounting base. A positioning spring is provided between the chuck body and the mounting base. A locking pin is installed on the inner wall of the inflation chamber. The end of the locking pin is provided with an inclined guide surface. A preload spring is installed between the locking pin and the chuck body. The end of the locking pin extends out of the inner wall of the inflation chamber to limit the rear end of the piston. A push rod is installed on the chuck body. The push rod is provided with an inclined pushing surface. An abutment post is installed on the locking pin. The pushing surface can abut against the abutment post. The push rod extends out of the rear end of the chuck body. The rear end of the chuck body and the mounting base move relative to each other, causing the push rod to be pushed forward by the mounting base. The locking pin is retracted by the cooperation of the pushing surface and the abutment post.

[0022] After the inflation pressure in the inflation chamber increases, the piston moves towards the return spring. During this process, the piston slides over the guide surface. Once the piston is in position, the locking pin extends out of the inner wall of the inflation chamber to limit the rear end of the piston. At this point, even if there is air leakage in the inflation chamber, the piston will not be pushed back by the return spring, ensuring the reliability of the inflation clamp in tightening and fixing the paper core. When it is necessary to remove the paper core from the inflation clamp, push the mounting base towards the paper core. The push rod is pushed by the mounting base, and the pushing surface on the push rod abuts against the abutment post on the locking pin, causing the locking pin to retract. The locking pin's limitation on the piston disappears, and the piston moves back to its original position under the action of the return spring, pulling the clamping body radially inward to loosen the paper core. Then, move the mounting base away from the paper core to remove the paper core.

[0023] Preferably, a return spring is installed between the push rod and the chuck body.

[0024] The return spring facilitates the return of the push rod, thereby enabling the locking pin to return to its original position.

[0025] Compared with the prior art, the beneficial effects of the present invention are: (1) The inflatable clamp of the present patent application is applicable to the clamping of paper cores of various sizes and specifications. The clamp does not need to be disassembled or replaced during clamping, making the operation convenient and the paper core is well tightened and fixed; (2) Even if the air leakage occurs in the air chamber, the piston will not be pushed back to its original position by the return spring, ensuring the reliability of the inflatable clamp in tightening and fixing the paper core. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a cross-sectional view of the venting state of the present invention;

[0028] Figure 3 This is a cross-sectional view of the present invention in its inflated state;

[0029] Figure 4 This is a cross-sectional view of the inflated state of Embodiment 2 of the present invention;

[0030] Figure 5 This is the invention Figure 4 A magnified view of part I in the diagram;

[0031] In the diagram: 1. Chuck body, 2. Flange, 3. Fastening hole, 4. Clamping section, 5. Chamfer, 6. Piston, 7. Clamping body, 8. Pushing surface, 9. Abutting surface, 10. Connecting bar, 11. Connecting groove, 12. Slider, 13. Expansion key, 14. Rubber pad, 15. Inflation chamber, 16. Return spring, 17. Front ring groove, 18. Rear ring groove, 19. Front end cover, 20. Rear end cover, 21. Inflation port, 22. Mounting seat, 23. Positioning spring, 24. Convex ring, 25. Positioning cover, 26. Locking pin, 27. Guide surface, 28. Preload spring, 29. Push rod, 30. Pushing surface, 31. Abutting post, 32. Return spring, 33. Flange. Detailed Implementation

[0032] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0033] Example 1: A universal integrated pneumatic chuck for a slitting machine (see attached) Figure 1 To be continued Figure 3 The chuck body includes a chuck body 1, a flange 2 at the rear end of the chuck body, and several fastening holes 3 evenly distributed on the flange. The chuck body has several clamping sections 4 that decrease in size along the axial direction, forming a stepped shaft structure. In this embodiment, two clamping sections are provided, with the flange located at the end of the clamping section with the larger outer diameter. Chamfers 5 are provided at the edges of the clamping sections. An axially movable piston 6 is installed inside the chuck body. Several radially movable clamping bodies 7 are installed on the clamping sections. Six clamping bodies are evenly distributed circumferentially on the clamping section with the larger outer diameter, and three clamping bodies are evenly distributed circumferentially on the clamping section with the smaller outer diameter. Inclined pushing surfaces 8 are provided on the outer wall of the piston corresponding to the clamping bodies. Two pushing surfaces are provided on the outer wall of the piston corresponding to the two clamping sections, each pushing surface forming a frustum circumferentially. Inclined abutment surfaces 9 are provided on the clamping bodies, with the pushing surfaces and abutment surfaces in contact. The axial movement of the piston drives the radial movement of the clamping bodies. A T-shaped connecting strip 10 is provided on the pushing surface, and a T-shaped connecting groove 11 is provided on the abutting surface. The connecting strip, connecting groove, pushing surface, and abutting surface are parallel. The connecting strip and connecting groove are adapted to each other and the connecting strip can slide along the connecting groove. The clamping body includes a slider 12 and an expansion key 13. The expansion key is fastened to the slider, and the abutting surface is provided on the slider. A rubber pad 14 is connected to the outer surface of the clamping body and is fastened to the expansion key.

[0034] An inflation chamber 15 is provided on one side of the piston inside the chuck body, and a return spring 16 is installed on the other side of the piston. The inflation chamber is located on the rear side of the chuck body. A piston chamber is provided inside the chuck body. The piston has a stepped shaft structure and is adapted to the piston chamber. The return spring is installed between the inner wall of the piston chamber and the stepped surface of the piston. The piston chamber has a T-shaped structure. A front annular groove 17 is provided on the transition surface of the inner wall of the piston chamber, and a rear annular groove 18 is provided on the stepped surface of the piston. The return spring is installed between the front annular groove and the rear annular groove. A sealing ring is installed between the outer wall of the piston and the inner wall of the piston chamber. A front end cap 19 and a rear end cap 20 are respectively installed at both ends of the chuck body. An inflation port 21 is provided on the rear end cap, which communicates with the inflation chamber. A sealing ring is installed between the rear end cap and the rear end of the chuck body.

[0035] When the paper core is tensioned and fixed, the end of the paper core is fitted onto the matching clamping section. Then, the piston moves axially, and through the force of the contact surface between the pushing surface and the abutting surface, the clamping body moves radially outward, thereby tensioning and fixing the paper core against the inner wall. Because several clamping sections with different outer diameters are provided, different clamping sections can achieve tensioning and fixing of paper cores of different sizes, thus the air-filled chuck has good versatility. In this embodiment, the two clamping sections are adapted to clamping 6-inch and 3-inch paper cores respectively, and no disassembly is required when switching between clamping two different sizes of paper cores.

[0036] Example 2: A universal integrated pneumatic chuck for a slitting machine (see attached) Figure 4 Appendix Figure 5Its structure is similar to that of Embodiment 1, with the main difference being that in this embodiment, the rear end of the chuck body is connected to a mounting base 22, and the rear end of the chuck body is movably connected to the mounting base. A positioning spring 23 is provided between the chuck body and the mounting base; a protruding ring 24 is provided at the front end of the mounting base, and the front part of the chuck body abuts against the protruding ring; a positioning cover 25 is connected to the rear end of the mounting base, and the positioning spring abuts against the positioning cover. A flange is provided on the outer edge of the mounting base, and several fastening holes are evenly distributed on the flange. A locking pin 26 is installed on the inner wall of the inflation chamber, and an inclined guide surface 27 is provided at the end of the locking pin, with the guide surface inclined from front to back and outward. A preload spring 28 is installed between the locking pin and the chuck body. The end of the locking pin extends out of the inner wall of the inflation chamber to limit the rear end of the piston. A push rod 29 is installed on the chuck body. A cross-shaped mounting cavity is provided on the chuck body corresponding to the locking pin. The locking pin is installed in the radial part of the mounting cavity, and the push rod is installed in the transverse part of the mounting cavity. An inclined pushing surface 30 is provided on the push rod, and the pushing surface is inclined from front to back and outward. An abutment post 31 is installed on the locking pin, and the pushing surface can abut against the abutment post. The push rod extends out of the rear end of the chuck body and approaches the positioning cover. The rear end of the chuck body moves relative to the mounting seat, causing the push rod to be pushed forward by the mounting seat. The locking pin retracts through the cooperation of the pushing surface and the abutment post. A return spring 32 is installed between the push rod and the chuck body. A flange 33 is provided on the push rod, and the return spring abuts against the flange. The push rod passes through the rear end cover, and the flange abuts against the front side of the rear end cover. Other structures are the same as in Embodiment 1.

[0037] After the inflation pressure in the inflation chamber increases, the piston moves towards the return spring. During this process, the piston slides over the guide surface. Once the piston is in position, the locking pin extends out of the inner wall of the inflation chamber to limit the rear end of the piston. At this point, even if there is air leakage in the inflation chamber, the piston will not be pushed back by the return spring, ensuring the reliability of the inflation clamp in tightening and fixing the paper core. When it is necessary to remove the paper core from the inflation clamp, push the mounting base towards the paper core. The push rod is pushed by the mounting base, and the pushing surface on the push rod abuts against the abutment post on the locking pin, causing the locking pin to retract. The locking pin's limitation on the piston disappears, and the piston moves back to its original position under the action of the return spring, pulling the clamping body radially inward to loosen the paper core. Then, move the mounting base away from the paper core to remove the paper core.

[0038] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A universal integrated pneumatic chuck for a slitting machine, comprising a chuck body, characterized in that, The chuck body has several clamping sections that decrease in size along the axial outer diameter, forming a stepped shaft structure. An axially movable piston is installed inside the chuck body. Several radially movable clamping bodies are mounted on the clamping sections. Inclined pushing surfaces are provided on the outer wall of the piston, corresponding to the clamping bodies. Inclined abutment surfaces are provided on the clamping bodies, with the pushing surfaces and abutment surfaces fitting together. The axial movement of the piston drives the radial movement of the clamping bodies. An air chamber is provided on one side of the piston inside the chuck body, and a return spring is installed on the other side. A piston cavity is also provided inside the chuck body. The piston has a stepped shaft structure, and the piston is fitted into the piston cavity. The return spring is installed between the inner wall of the piston cavity and the stepped surface of the piston. The chuck body has a mounting base connected to its rear end, and the rear end of the chuck body is movably connected to the mounting base. A positioning spring is installed between the chuck body and the mounting base. A locking pin is installed on the inner wall of the inflation chamber. The end of the locking pin has an inclined guide surface. A preload spring is installed between the locking pin and the chuck body. The end of the locking pin extends out of the inner wall of the inflation chamber to limit the rear end of the piston. A push rod is installed on the chuck body. The push rod has an inclined pushing surface. An abutment post is installed on the locking pin. The pushing surface can abut against the abutment post. The push rod extends out of the rear end of the chuck body. The rear end of the chuck body and the mounting base move relative to each other, causing the push rod to be pushed forward by the mounting base. The locking pin retracts through the cooperation of the pushing surface and the abutment post.

2. The universal integrated pneumatic chuck for a slitting machine according to claim 1, characterized in that, All edges of the clamping section are chamfered.

3. The universal integrated pneumatic chuck for a slitting machine according to claim 1, characterized in that, A T-shaped connecting strip is provided on the pushing surface, and a T-shaped connecting groove is provided on the abutting surface. The connecting strip and the connecting groove are adapted to each other and can slide along the connecting groove.

4. The universal integrated pneumatic chuck for a slitting machine according to claim 1, characterized in that, The clamping body includes a slider and an expansion key, the expansion key being fastened to the slider, and the abutment surface being disposed on the slider.

5. A universal integrated pneumatic chuck for a slitting machine according to any one of claims 1 to 4, characterized in that, Clamping the outer surface of the body to attach the rubber pad.

6. A universal integrated pneumatic chuck for a slitting machine according to claim 1, characterized in that, A sealing ring is installed between the outer wall of the piston and the inner wall of the piston chamber.

7. A universal integrated pneumatic chuck for a slitting machine according to claim 1, characterized in that, The chuck body has a front cover and a rear cover installed at both ends. An inflation port is provided on the rear cover and is connected to the inflation chamber.

8. A universal integrated pneumatic chuck for a slitting machine according to claim 1, 6, or 7, characterized in that, A flange is installed at the rear end of the chuck body.

9. A universal integrated pneumatic chuck for a slitting machine according to claim 1, characterized in that, A return spring is installed between the push rod and the chuck body.

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