A quick clamping device for a web

Abstract

The application belongs to the field of tool fixtures, and particularly relates to a quick clamping device for a coiled material, which comprises a movable mandrel, a shaft sleeve sleeved on the movable mandrel, at least one supporting block in sliding fit with the movable mandrel, an elastic member arranged in the shaft sleeve and used for generating axial elastic force on the movable mandrel, a shaft end cover arranged at the end of the shaft sleeve, a supporting shaft arranged at one end of the movable mandrel, the supporting shaft penetrating through and protruding from the shaft end cover, the shaft end cover being used for fixed-axle rotary installation on a corresponding rack, the movable mandrel being provided with a guide groove in sliding fit with the supporting block, and the depth of the guide groove gradually decreasing from one end close to the supporting shaft to the other end. The movable mandrel is moved inward by axial pressing of the supporting shaft, the elastic member is compressed, the supporting block is driven to contract radially by the gradually changing depth of the guide groove, and the coiled material is conveniently loaded. After the external force is released, the elastic member pushes the movable mandrel to reset, the supporting block is guided to extend radially by the guide groove, and the coiled material is automatically clamped and fixed.

Description

Technical Field

[0001] This application belongs to the field of tooling and fixtures, and specifically relates to a quick clamping device for rolled materials. Background Technology

[0002] In current cigarette label printing processes, especially in the hot stamping process, the rapid changeover and clamping of electroplated aluminum coils is a crucial step. Traditional clamping methods typically require significant time and manpower, and suffer from inconvenience and low efficiency, particularly when frequent changes of electroplated aluminum coils are necessary. Therefore, achieving rapid and accurate clamping of electroplated aluminum coils has become a key factor in improving production efficiency.

[0003] To address these issues, some improvements have been proposed in the prior art, such as using pneumatic or hydraulic drive devices to assist in the clamping process of the roll material. However, these methods often increase the complexity and cost of the system and place higher demands on maintenance. Utility Model Content

[0004] The technical problem to be solved by this application is to provide a quick clamping device for roll materials, which is simple in structure, easy to operate and has a high efficiency of fully mechanical structure.

[0005] This application provides a quick clamping device for roll materials, including a movable mandrel, a bushing sleeved on the movable mandrel, at least one support block that is slidably fitted with the movable mandrel, an elastic element disposed in the bushing and used to generate axial elastic force on the movable mandrel, and a shaft end cap disposed at the end of the bushing and used to restrict the movable mandrel. One end of the movable mandrel is provided with a support shaft, which passes through and protrudes from the shaft end cap. The shaft end cap is used for fixed-axis rotatable mounting on a corresponding frame. The movable mandrel has a guide groove that slidably fits with the support block, and the depth of the guide groove gradually decreases from one end near the support shaft to the other end. When an axial inward external force is applied to the support shaft, the movable mandrel can move inward along the axis, causing the elastic element to compress and the support block to retract radially towards the center and enter the bushing, so that the roll material can be loaded onto the bushing; when the external force on the movable mandrel is released, the movable mandrel moves outward and resets under the action of the elastic element, and the support block extends outward under the guidance of the guide groove, thus completing the fixation of the roll material.

[0006] Optionally, the number of support blocks is two or more, and they are evenly distributed along the circumference of the movable spindle.

[0007] Optionally, the bottom surface of the guide groove has an inclination angle of 5° to 30°, which is used to convert the axial displacement of the movable spindle into the radial displacement of the support block.

[0008] Optionally, the elastic element is a compression spring, inserted into one end of the movable mandrel, and located between the inner wall of the bushing and the movable mandrel.

[0009] Optionally, the bushing and the end cap with shaft are detachably connected by a threaded connection, a snap-fit ​​connection, or a pin fixing method.

[0010] Optionally, the support block extends 0.5mm to 5mm beyond the outer surface of the bushing in its natural state, ensuring reliable clamping for rolls with different inner diameter tolerances.

[0011] Optionally, the bushing has a plurality of radially distributed grooves, each of the radial grooves being used to guide a corresponding support block to remain in radial movement along the bushing.

[0012] Optionally, the bushing has a plurality of circumferentially distributed mounting grooves, each mounting groove being arranged intersecting with a corresponding radial through groove, a limiting block being provided in the mounting groove, and the support block having a groove that mates with the limiting block.

[0013] Optionally, the support block includes a base portion that slides with the bottom surface of the guide groove and a support portion that is arranged perpendicularly to the base portion. The height of the support portion perpendicular to the direction of the base portion gradually increases from one end near the support shaft to the other end, and the same rate of change is as the depth of the guide groove, so that the support portion is in full contact with the roll material.

[0014] Optionally, the guide groove is a T-shaped groove and matches the cross-sectional shape of the support block.

[0015] The beneficial effects of this application are that by axially pressing the support shaft, the movable core moves inward, compressing the elastic element. Simultaneously, the gradual change in the depth of the guide groove drives the support block to retract radially, facilitating the loading of the roll material. After releasing the external force, the elastic element pushes the movable core shaft back to its original position, and the support block extends radially under the guidance of the guide groove, achieving automatic clamping and fixing of the roll material. This device has advantages such as simple structure, convenient operation, and no need for an external power source. It completely solves the problems of low efficiency in traditional clamping methods and the complexity and expense of pneumatic / hydraulic auxiliary devices, significantly improving the efficiency of changing electroplated aluminum roll materials and reducing equipment maintenance costs. It is particularly suitable for printing processes such as hot stamping that require frequent roll material changes, achieving efficient and reliable rapid roll material clamping. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the clamping device provided in the embodiments of this application; Figure 2 This is an exploded structural diagram of the clamping device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the support block provided in an embodiment of this application; Figure 4 This is a structural schematic diagram of the clamping device in use according to an embodiment of this application; Figure 5 This is an exploded structural diagram of the clamping device provided in the embodiment of this application in use.

[0017] In the diagram: 100, clamping device; 110, movable spindle; 111, support shaft; 112, guide groove; 120, bushing; 121, radial through groove; 122, mounting groove; 130, support block; 131, base part; 132, support part; 133, groove; 140, elastic element; 150, with shaft end cap; 160, limiting block; 200, mounting plate; 210, bearing; 220, snap ring; 300, coil material. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] like Figure 1-5 As shown, this application provides a quick clamping device for roll materials, including a movable mandrel 110, a bushing 120 sleeved on the movable mandrel 110, at least one support block 130 that is embedded and slidably engaged with the movable mandrel 110, an elastic element 140 disposed within the bushing 120 and used to generate axial elastic force on the movable mandrel 110, and a shaft-mounted end cap 150 disposed at the end of the bushing 120 and used to restrict the movable mandrel 110. A support shaft 111 is provided at one end of the movable mandrel 110, the support shaft 111 passing through and protruding from the shaft-mounted end cap 150. The shaft-mounted end cap 150 is used for fixed-axis rotatable mounting on a corresponding frame. The movable mandrel 110 has... The guide groove 112, which slides in conjunction with the support block 130, gradually becomes shallower from one end near the support shaft 111 to the other. When an axial inward external force is applied to the support shaft 111, the movable spindle 110 can move inward along the axis, causing the elastic element 140 to compress and the support block 130 to retract radially toward the center into the bushing 120, so that the roll material 300 can be installed into the bushing 120. When the external force on the movable spindle 110 is released, the movable spindle 110 moves outward and resets under the action of the elastic element 140, and the support block 130 extends outward under the guidance of the guide groove 112, thus completing the fixation of the roll material 300.

[0020] Compared with existing technologies, the quick clamping device 100 for roll materials provided in this application adopts a purely mechanical structure design. Axial pressing of the support shaft 111 causes the movable spindle 110 to move inward, compressing the elastic element 140. Simultaneously, the gradual depth change of the guide groove 112 drives the support block 130 to retract radially, facilitating the loading of the roll material 300. After releasing the external force, the elastic element 140 pushes the movable spindle 110 back to its original position, and the support block 130 extends radially under the guidance of the guide groove 112, achieving automatic clamping and fixing of the roll material 300. This device has advantages such as simple structure, convenient operation, and no need for an external power source. It completely solves the problems of low efficiency in traditional clamping methods and the complexity and cost of pneumatic / hydraulic auxiliary devices, significantly improving the replacement efficiency of the electroplated aluminum roll material 300 and reducing equipment maintenance costs. It is particularly suitable for printing processes such as hot stamping that require frequent changes of the roll material 300, achieving efficient and reliable quick clamping of the roll material 300.

[0021] It should be noted that this clamping device 100 is used in the production process of holographic label stamping on cigarette rolls, where the holographic roll material 300 needs to be quickly clamped and replaced from the center. This device is mainly composed of a shaft mounted on a mounting plate 200 on a machine frame via a shaft with an end cap 150, and its position is fixed by a snap ring 220.

[0022] In one possible implementation, there are two or more support blocks 130, which are evenly distributed circumferentially along the movable spindle 110.

[0023] Specifically, the number of support blocks 130 can be two, three, four or more, and they are evenly distributed along the circumference of the movable spindle 110. Each support block 130 matches the corresponding guide groove 112 on the movable spindle 110. The inner wall of the bushing 120 is provided with a radial through groove 121 that matches the number and position of the support blocks 130, allowing the support blocks 130 to perform radial extension and retraction movements synchronously under the drive of the elastic element 140.

[0024] In one possible implementation, the bottom surface of the guide groove 112 has an inclination angle of 5° to 30°, which is used to convert the axial displacement of the movable spindle 110 into the radial displacement of the support block 130.

[0025] Specifically, when the operator presses the support shaft 111 to move the movable spindle 110 axially inward, the mating protrusion at the bottom of the support block 130 slides along the inclined surface of the guide groove 112. Under the action of the inclined surface, it is forced to generate radial displacement in the axial direction, thereby retracting into the bushing 120. Conversely, when the external force is removed, the elastic element 140 pushes the movable spindle 110 to reset outward, and the support block 130 extends outward synchronously under the reverse guidance of the inclined surface of the guide groove 112, pressing against the inner wall of the roll material 300. If the tilt angle is less than 5°, the radial travel is insufficient and the clamping force is weak; if it is greater than 30°, although a larger radial displacement can be obtained, it is easy to cause self-locking or excessive operating resistance. Therefore, controlling the tilt angle of the bottom surface of the guide groove 112 within the range of 5° to 30° can effectively achieve reliable radial extension and contraction and stable clamping effect while ensuring easy operation, thus taking into account both mechanical efficiency and ease of use.

[0026] In one possible implementation, the elastic element 140 is a compression spring, inserted into one end of the movable spindle 110, and located between the inner wall of the bushing 120 and the movable spindle 110.

[0027] Specifically, when the operator presses the support shaft 111 inward, the movable spindle 110 overcomes the elastic force of the compression spring and moves axially, compressing the spring to store energy. Once the external force is removed, the compression spring, relying on its own restoring force, pushes the movable spindle 110 to return to its original position axially, thereby causing the support block 130 to extend radially under the action of the guide groove 112, achieving automatic clamping of the roll material 300. This arrangement is compact and coaxially stressed, ensuring not only the smoothness and consistency of the reset action but also avoiding the risk of uneven loading or jamming. It also facilitates assembly and replacement, effectively guaranteeing the long-term reliability of the clamping device 100 and the ease of operation.

[0028] In one possible implementation, the bushing 120 and the end cap 150 with shaft are detachably connected by a threaded connection, a snap-fit ​​connection, or a pin fixing method.

[0029] Specifically, any of the above connection methods facilitates quick disassembly of the device for maintenance or replacement of parts when the support block 130, compression spring, or movable spindle 110 is worn or malfunctions. At the same time, it ensures that the shaft end cap 150 firmly and reliably restricts the axial travel of the movable spindle 110 during equipment operation, taking into account ease of assembly, structural stability, and maintainability in the later stages.

[0030] In one possible implementation, the support block 130 extends 0.5mm to 5mm beyond the outer surface of the bushing 120 in its natural state, ensuring reliable clamping of the roll material 300 with different inner diameter tolerances.

[0031] For example, the height of the support block 130 extending beyond the outer surface of the bushing 120 in its natural state can be any typical but non-limiting point value or a range between any two points, such as 0.5mm, 1.0mm, 1.5mm, 2mm, 2.5mm, 3mm, 4mm, or 5mm. In this case, it can accommodate the slight variation in the inner diameter of different batches of roll material 300 due to manufacturing tolerances (usually within a few millimeters), while ensuring sufficient radial interference and contact pressure during clamping, thereby achieving a stable clamping of the roll material 300. When the inner diameter of the roll material 300 is large, the larger extension height can still ensure effective contact and clamping force; when the inner diameter is small, the support block 130 can retract moderately during the insertion of the roll material 300, relying on the elasticity of the compression spring to maintain the fit. This range balances clamping reliability and loading smoothness, avoiding insufficient clamping and slippage due to excessive extension, or difficulties in loading or even damage to the inner wall of the roll 300 due to excessive extension. It significantly improves the device's versatility and process adaptability to rolls 300 of different specifications.

[0032] In some embodiments, the outer surface of the support block 130 may be designed to be arc-shaped to match the inner wall of the roll 300, and the contact surface may be increased with anti-slip textures or rubber pads to prevent the roll 300 from slipping during operation.

[0033] In one possible implementation, the bushing 120 has a plurality of radially distributed through slots 121, each radial through slot 121 being used to guide a corresponding support block 130 to remain in radial movement along the bushing 120.

[0034] Specifically, these radial through grooves 121 not only provide the necessary movement channels for the support block 130, allowing it to smoothly complete radial contraction or extension actions when the movable spindle 110 moves axially, but also play a good limiting and guiding role for the support block 130, effectively preventing it from jamming or wearing due to uneven force during clamping.

[0035] In one possible implementation, the bushing 120 has a plurality of circumferentially distributed mounting grooves 122, each mounting groove 122 being arranged intersecting with a corresponding radial through groove 121, and a limiting block 160 being provided in the mounting groove 122, and the support block 130 having a groove 133 that mates with the limiting block 160.

[0036] Specifically, when the support block 130 is inserted into the radial through groove 121, its groove 133 engages with the limiting block 160 to form a mechanical interlock, thereby ensuring that the support block 130 can freely extend and retract in the radial direction while effectively restricting its axial and circumferential movement, preventing displacement, swaying or falling off during clamping or high-speed operation.

[0037] In one possible implementation, the support block 130 includes a base portion 131 that slides with the bottom surface of the guide groove 112 and a support portion 132 arranged perpendicularly to the base portion 131. The height of the support portion 132 perpendicular to the direction of the base portion 131 gradually increases from one end near the support shaft 111 to the other end, and the same rate of change of depth as the guide groove 112, so that the support portion 132 is in full contact with the roll material 300.

[0038] Specifically, when the movable mandrel 110 is reset under the action of the elastic element 140, the top of the support portion 132 of the support block 130 remains in the same radial position as it slides outward along the guide groove 112. This ensures that the support surfaces of the multiple support blocks 130 are concentric in the clamped state, achieving uniform, sufficient, and synchronous surface contact with the inner wall of the roll 300. This structure effectively avoids local stress concentration or clamping eccentricity problems caused by inconsistent support heights, significantly improving clamping stability, the concentricity of the roll 300, and the adaptability of the device to different roll inner diameters.

[0039] In one possible implementation, the guide groove 112 is a T-groove that matches the cross-sectional shape of the support block 130.

[0040] Specifically, the guide groove 112 has an inverted "T" shaped cross-section, including a wide groove at the bottom and a narrower sliding cavity at the top. The base portion 131 of the support block 130 matches the wide groove at the bottom of the guide groove 112, allowing the support block 130 to be securely embedded in the guide groove 112 and slide smoothly axially within it. This effectively prevents the support block 130 from coming off or lifting due to force during radial clamping. This not only enhances the connection reliability between the support block 130 and the movable spindle 110 but also significantly improves the guiding accuracy and torsional resistance during movement, avoiding the shaking, uneven wear, or jamming problems that are common with traditional rectangular grooves.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0042] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A quick clamping device for rolled materials, characterized in that, The device includes a movable spindle (110), a bushing (120) sleeved on the movable spindle (110), at least one support block (130) that is embedded and slidably engaged with the movable spindle (110), an elastic element (140) disposed in the bushing (120) and used to generate axial elastic force on the movable spindle (110), and a shaft end cap (150) disposed at the end of the bushing (120) and used to restrict the movable spindle (110). One end of the movable spindle (110) is provided with a support shaft (111), the support shaft (111) passes through and protrudes from the shaft end cap (150), and the shaft end cap (150) is used to be fixedly and rotatably mounted on a corresponding frame. The movable spindle (110) has a guide groove (112) that slidably engages with the support block (130), and the depth of the guide groove (112) gradually becomes shallower from one end near the support shaft (111) to the other end. When an axial inward external force is applied to the support shaft (111), the movable mandrel (110) can move inward along the axis, causing the elastic element (140) to compress, and the support block (130) to retract radially toward the center into the bushing (120), so that the roll material (300) can be installed on the bushing (120); when the external force on the movable mandrel (110) is released, the movable mandrel (110) moves outward and resets under the action of the elastic element (140), and the support block (130) extends outward under the guidance of the guide groove (112), thus completing the fixation of the roll material (300).

2. The quick clamping device for roll materials according to claim 1, characterized in that, The number of support blocks (130) is two or more, and they are evenly distributed along the circumference of the movable spindle (110).

3. The quick clamping device for roll materials according to claim 1, characterized in that, The bottom surface of the guide groove (112) has an inclination angle of 5° to 30°, which is used to convert the axial displacement of the movable spindle (110) into the radial displacement of the support block (130).

4. The quick clamping device for roll materials according to claim 1, characterized in that, The elastic element (140) is a compression spring, which is inserted into one end of the movable spindle (110) and located between the inner wall of the bushing (120) and the movable spindle (110).

5. The quick clamping device for roll materials according to claim 1, characterized in that, The bushing (120) and the end cap (150) with shaft are detachably connected by threaded connection, snap-fit ​​connection or pin fixing.

6. The quick clamping device for roll materials according to claim 1, characterized in that, The support block (130) extends 0.5mm to 5mm above the outer surface of the bushing (120) in its natural state, ensuring reliable clamping of rolls (300) with different inner diameter tolerances.

7. The quick-clamping device for roll materials according to any one of claims 1-6, characterized in that, The bushing (120) has a plurality of radial through slots (121) distributed circumferentially, each of the radial through slots (121) being used to guide a corresponding support block (130) to remain in radial movement along the bushing (120).

8. The quick clamping device for roll materials according to claim 7, characterized in that, The bushing (120) has a plurality of circumferentially distributed mounting grooves (122), each mounting groove (122) is arranged intersecting with a corresponding radial through groove (121), a limiting block (160) is provided in the mounting groove (122), and the support block (130) has a groove (133) that cooperates with the limiting block (160).

9. The quick clamping device for roll materials according to claim 7, characterized in that, The support block (130) includes a base portion (131) that slides with the bottom surface of the guide groove (112) and a support portion (132) that is arranged perpendicularly to the base portion (131). The height of the support portion (132) perpendicular to the base portion (131) gradually increases from one end near the support shaft (111) to the other end, and is the same as the depth change rate of the guide groove (112), so that the support portion (132) is in full contact with the roll material (300).

10. The quick clamping device for roll materials according to claim 9, characterized in that, The guide groove (112) is a T-shaped groove and matches the cross-sectional shape of the support block (130).

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