Adjustable eccentric cutter sleeve jig

Abstract

The utility model relates to the technical field of round knife die -cutting machine, in particular to adjustable eccentric cutter sleeve fixture, including adjusting tool block, set up on adjusting tool block's thimble assembly, with thimble assembly matched adjusting screw rod, eccentric wheel and with eccentric wheel matched regulation and control mechanism, the eccentric hole of eccentric wheel is equipped with the elastic compensation component for eliminating the clearance between round knife shaft end and eccentric hole, the sealing assembly for blocking dust into eccentric hole is equipped between adjusting tool block and eccentric wheel, adjusting tool block still is equipped with the dust cover for covering regulation and control mechanism, it can promote round knife positioning accuracy, prevent dust invasion and guarantee the adjustment sensitivity.

Description

Technical Field

[0001] This utility model relates to the technical field of circular die-cutting machines, and in particular to an adjustable eccentric blade holder fixture. Background Technology

[0002] Rotary die-cutting machines are one of the equipment in the die-cutting field that enables continuous processing. Their core working component is the rotary die, which is machined from a solid metal cylinder. During operation, it continuously rotates to die-cut, cut, or creasing various roll materials such as film, paper, and foam. Due to its high production efficiency, it is widely used in industries such as electronics, packaging, and printing. On a rotary die-cutting machine, the die holder fixture is a key tooling used to install and position the rotary die and to adjust the offset of the rotary die's axis, directly affecting the processing accuracy and product yield.

[0003] Existing tool holder fixtures typically include an adjusting block, an ejector pin assembly, an adjusting screw, an eccentric wheel, and a control mechanism. The adjusting screw allows the ejector pin of the ejector pin assembly to mate with the center hole at the shaft end of the circular cutter. The eccentric wheel is used for rotatable connection with the shaft end of the circular cutter. The control mechanism controls the rotation and locking of the eccentric wheel to adjust the offset of the circular cutter's shaft center. While this addresses the inconvenience of traditional tool holder adjustments to some extent, it still has shortcomings in practical applications. First, because the connection structure between the eccentric wheel and the shaft end of the circular cutter is relatively simple, gaps are easily generated under high-speed rotation conditions, leading to a decrease in the positioning accuracy of the circular cutter. Furthermore, the eccentric hole of the eccentric wheel, the bushing fit clearance, and the control mechanism are exposed to the working environment. Dust and debris generated during machining can easily enter the internal gaps, causing the eccentric wheel to jam, accelerating bushing wear, and reducing adjustment sensitivity. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an adjustable eccentric tool holder fixture that improves the positioning accuracy of the circular tool, prevents dust intrusion, and ensures adjustment sensitivity.

[0005] This utility model discloses an adjustable eccentric tool holder fixture, comprising an adjusting block, a pin assembly mounted on the adjusting block, an adjusting screw cooperating with the pin assembly, an eccentric wheel, and a control mechanism cooperating with the eccentric wheel; an elastic compensation component for eliminating the gap between the end of the circular tool shaft and the eccentric hole is provided in the eccentric hole of the eccentric wheel; a sealing component for preventing dust from entering the eccentric hole is provided between the adjusting block and the eccentric wheel; and a dust cover for covering the control mechanism is also provided on the adjusting block.

[0006] As a preferred embodiment of this utility model, the elastic compensation component includes a compensation ring sleeved on the outer periphery of the round cutter shaft end, and an elastic element disposed between the compensation ring and the inner wall of the eccentric hole. The inner circumferential surface of the compensation ring is in contact with the outer circumferential surface of the round cutter shaft end, and the elastic elements are distributed at intervals along the circumferential direction of the compensation ring.

[0007] As a preferred embodiment of this utility model, the outer circumferential surface of the compensation ring is provided with a mounting groove for accommodating the elastic element. One end of the elastic element abuts against the bottom wall of the mounting groove, and the other end abuts against the inner wall of the eccentric hole. The elastic element is a compression spring or an elastic rubber block.

[0008] As a preferred embodiment of this utility model, the adjusting block is provided with a through hole and a cover plate that cooperate with the eccentric wheel. The sealing assembly includes a radial seal between the inner wall of the through hole and the outer peripheral surface of the eccentric wheel, and an axial seal between the cover plate and the end face of the eccentric wheel near the cover plate.

[0009] As a preferred embodiment of this utility model, the radial seal is a lip seal ring, and the inner wall of the through hole is provided with an annular sealing groove for installing the radial seal; the axial seal is a graphite gasket, and the cover plate is provided with an annular positioning groove for positioning the axial seal on the side near the eccentric wheel.

[0010] As a preferred embodiment of this utility model, the dust cover and the adjusting block are detachably connected, and the dust cover is provided with a transparent observation window for observing the status of the control mechanism.

[0011] As a preferred embodiment of this utility model, the inner wall of the eccentric hole of the eccentric wheel is provided with a wear-resistant layer, which is a nitrided layer or a hard alloy coating.

[0012] As a preferred embodiment of this utility model, the adjusting block is provided with limiting parts on both sides for cooperating with the equipment slide groove, and the limiting parts are provided with a friction-reducing coating.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By installing an elastic compensation component inside the eccentric hole of the eccentric wheel, the gap between the end of the circular cutter shaft and the eccentric hole can be actively eliminated through the cooperation of the compensation ring and the elastic element. This solves the problem of decreased positioning accuracy of the circular cutter caused by the gap under high-speed rotation conditions in existing fixtures, thereby ensuring the processing accuracy and product yield of roll die-cutting. At the same time, the sealing component between the adjusting block and the eccentric wheel can prevent dust and debris from entering the eccentric hole and the bushing mating gap. Combined with the dust cover covering the adjustment mechanism, it can avoid the eccentric wheel from getting stuck and the bushing from wearing out, thus maintaining the adjustment sensitivity of the fixture for a long time. In addition, the wear-resistant layer on the inner wall of the eccentric hole and the friction-reducing coating on the limiting part of the adjusting block can further improve the wear resistance and assembly stability of the fixture, extending its overall service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ; Figure 3This is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 yes Figure 3 A magnified structural diagram of part A in the middle; The attached diagram is labeled as follows: 1. Adjusting block; 11. Through hole; 12. Cover plate; 13. Limiting part; 2. Ejector pin assembly; 3. Adjusting screw; 4. Eccentric wheel; 41. Eccentric hole; 5. Control mechanism; 6. Elastic compensation assembly; 61. Compensation ring; 611. Mounting groove; 62. Elastic element; 71. Radial seal; 72. Axial seal; 8. Dust cover; 81. Observation window. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Reference Figures 1-4 This embodiment provides an adjustable eccentric tool holder fixture, including an adjusting block 1, a pin assembly 2 disposed on the adjusting block 1, an adjusting screw 3 cooperating with the pin assembly 2, an eccentric wheel 4, and a control mechanism 5 cooperating with the eccentric wheel 4. An elastic compensation component 6 is provided inside the eccentric hole 41 of the eccentric wheel 4 to eliminate the gap between the end of the circular cutter shaft and the eccentric hole 41. This elastic compensation component 6 can continuously provide radial compensation force, ensuring that the end of the circular cutter shaft remains tightly fitted to the inner wall of the eccentric hole 41 during high-speed rotation, effectively avoiding vibration and decreased positioning accuracy caused by the gap. A sealing component is provided between the adjusting block 1 and the eccentric wheel 4 to prevent dust from entering the eccentric hole 41. This sealing component can isolate dust and debris generated in the external processing environment, preventing them from intruding into the mating interface between the eccentric wheel 4 and the adjusting block 1, thereby maintaining the sensitivity and service life of the adjustment mechanism. In addition, a dust cover 8 is provided on the adjusting block 1 to cover the control mechanism 5, further protecting the control mechanism 5 from contamination and ensuring its long-term stable operation.

[0018] The elastic compensation component 6 includes a compensation ring 61 sleeved on the outer periphery of the circular cutter shaft end, and an elastic element 62 disposed between the compensation ring 61 and the inner wall of the eccentric hole 41. The inner circumferential surface of the compensation ring 61 fits against the outer circumferential surface of the circular cutter shaft end to achieve initial positioning. The elastic elements 62 are evenly distributed along the circumferential interval of the compensation ring 61. For example, six or eight elastic elements 62 can be evenly distributed to make the compensation force evenly distributed. When the circular cutter shaft end produces a small radial offset, the elastic element 62 can be compressed or rebound, driving the compensation ring 61 to move slightly, thereby automatically compensating for the gap and maintaining close contact. This can improve the dynamic stability of the circular cutter under high-speed operation and reduce vibration and noise.

[0019] Specifically, the outer circumferential surface of the compensation ring 61 is provided with a mounting groove 611 for accommodating the elastic element 62; the depth and shape of the mounting groove 611 correspond to the pre-compression amount of the elastic element 62, one end of the elastic element 62 abuts against the bottom wall of the mounting groove 611, and the other end abuts against the inner wall of the eccentric hole 41; the elastic element 62 can be a compression spring or an elastic rubber block; the compression spring can provide a linear and stable compensation force, while the elastic rubber block can provide a damping effect, which helps to absorb high-frequency vibrations; by selecting different elastic elements 62, different working loads and accuracy requirements can be adapted.

[0020] The adjusting block 1 is provided with a through hole 11 and a cover plate 12 that mate with the eccentric wheel 4; the sealing assembly includes a radial seal 71 disposed between the inner wall of the through hole 11 and the outer peripheral surface of the eccentric wheel 4, and an axial seal 72 disposed between the cover plate 12 and the end face of the eccentric wheel 4 near the cover plate 12; the radial seal 71 is preferably a lip seal ring, with its lip facing the side that may be infiltrated by dust, which can scrape off contaminants on the surface of the eccentric wheel 4 when it rotates, and achieve a tight seal by its own elasticity; the inner wall of the through hole 11 is provided with a mounting... The radial seal 71 has an annular sealing groove that corresponds to the appropriate compression of the sealing ring after installation. The axial seal 72 is preferably a graphite gasket. Graphite material has good self-lubricating properties and high temperature resistance, and can maintain stable sealing performance even after long-term operation. The cover plate 12 has an annular positioning groove on the side near the eccentric wheel 4 for positioning the axial seal 72 to prevent the gasket from shifting during installation or operation. The multi-seal design can solve the problem of dust intrusion and extend the maintenance cycle of the fixture.

[0021] The dust cover 8 and the adjusting block 1 are detachably connected by screws or clips, which facilitates the maintenance or adjustment of the internal control mechanism 5. The dust cover 8 is equipped with a transparent observation window 81 for observing the status of the control mechanism 5. The observation window 81 can be made of high-strength transparent plastic or tempered glass. Operators can intuitively understand the scale or position of the adjusting screw sleeve and other components without opening the dust cover 8, which is convenient for operation and avoids the introduction of dust by frequent opening and closing.

[0022] To improve wear resistance, the inner wall of the eccentric hole 41 of the eccentric wheel 4 is provided with a wear-resistant layer, which can be a nitriding layer or a cemented carbide coating. Nitriding treatment can form a high-hardness nitride layer on the surface, improving wear resistance, while cemented carbide coating has extremely high hardness and wear resistance. The application of the wear-resistant layer can reduce the wear between the inner wall of the eccentric hole 41 and the compensation ring 61 or the end of the circular cutter shaft, ensuring the accuracy stability under long-term use.

[0023] The adjusting block 1 has limiting parts 13 on both sides for cooperating with the equipment slide groove, ensuring the accuracy of the fixture's installation and positioning on the equipment; in order to reduce the frictional resistance of the adjusting block 1 moving in the slide groove, the limiting part 13 is provided with a friction-reducing coating, which can be a polytetrafluoroethylene coating or a molybdenum disulfide coating with an extremely low coefficient of friction, which can make the movement of the adjusting block 1 smoother and less labor-intensive, and facilitate precise lateral position adjustment.

[0024] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An adjustable eccentric tool holder fixture, characterized in that, The device includes a tool adjusting block (1), a pin assembly (2) mounted on the tool adjusting block (1), an adjusting screw (3) cooperating with the pin assembly (2), an eccentric wheel (4), and a control mechanism (5) cooperating with the eccentric wheel (4); the eccentric hole (41) of the eccentric wheel (4) is provided with an elastic compensation component (6) for eliminating the gap between the end of the round cutter shaft and the eccentric hole (41); a sealing component for preventing dust from entering the eccentric hole (41) is provided between the tool adjusting block (1) and the eccentric wheel (4); the tool adjusting block (1) is also provided with a dust cover (8) for covering the control mechanism (5).

2. The adjustable eccentric tool holder fixture as described in claim 1, characterized in that, The elastic compensation component (6) includes a compensation ring (61) sleeved on the outer periphery of the end of the circular cutter shaft, and an elastic element (62) disposed between the compensation ring (61) and the inner wall of the eccentric hole (41). The inner circumferential surface of the compensation ring (61) is in contact with the outer circumferential surface of the end of the circular cutter shaft, and the elastic element (62) is distributed circumferentially along the compensation ring (61).

3. The adjustable eccentric tool holder fixture as described in claim 2, characterized in that, The outer circumferential surface of the compensation ring (61) is provided with a mounting groove (611) for accommodating the elastic element (62). One end of the elastic element (62) abuts against the bottom wall of the mounting groove (611), and the other end abuts against the inner wall of the eccentric hole (41). The elastic element (62) is a compression spring or an elastic rubber block.

4. The adjustable eccentric tool holder fixture as described in claim 1, characterized in that, The adjusting block (1) is provided with a through hole (11) and a cover plate (12) that cooperate with the eccentric wheel (4). The sealing assembly includes a radial seal (71) between the inner wall of the through hole (11) and the outer peripheral surface of the eccentric wheel (4), and an axial seal (72) between the cover plate (12) and the end face of the eccentric wheel (4) near the cover plate (12).

5. The adjustable eccentric tool holder fixture as described in claim 4, characterized in that, The radial seal (71) is a lip seal ring, and the inner wall of the through hole (11) is provided with an annular sealing groove (111) for installing the radial seal (71); the axial seal (72) is a graphite gasket, and the cover plate (12) is provided with an annular positioning groove (121) for positioning the axial seal (72) on the side near the eccentric wheel (4).

6. The adjustable eccentric tool holder fixture as described in claim 1, characterized in that, The dust cover (8) is detachably connected to the knife adjustment block (1), and the dust cover (8) is provided with a transparent observation window (81) for observing the status of the control mechanism (5).

7. The adjustable eccentric tool holder fixture as described in claim 1, characterized in that, The inner wall of the eccentric hole (41) of the eccentric wheel (4) is provided with a wear-resistant layer, which is a nitrided layer or a hard alloy coating.

8. The adjustable eccentric tool holder fixture as described in claim 1, characterized in that, The blade adjusting block (1) has limiting parts (13) on both sides for cooperating with the equipment slide groove, and the limiting parts (13) are provided with a friction-reducing coating.

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