Clamping device for roll paper core

Abstract

The invention provides a clamping device for a roll paper core. The clamping device comprises a chuck sleeve, a chuck mandrel and an expansion block. A mounting cavity is formed in the middle of the chuck sleeve, and a mounting groove for communicating the mounting cavity with the outside is formed in the side wall of the chuck sleeve; the chuck mandrel is mounted in the mounting cavity and can reciprocate in the axial direction of the mounting cavity under the action of external force; the expansion block is installed in the installation groove, one side of the expansion block extends to the installation cavity and abuts against the chuck core shaft, and the expansion block can move in the radial direction of the installation cavity under the abutting action of the chuck core shaft. And one side, deviating from the mounting cavity, of the expansion block protrudes out of the mounting groove and is used for propping against the inner side wall of the roll paper core. According to the clamping device for the roll paper core provided by the embodiment of the invention, a structure that the chuck mandrel is matched with the expansion block is designed, so that clamping of paper cores of multiple sizes can be realized, and the clamping device has the characteristics of simple structure and low cost.

Description

Technical Field

[0001] The present application relates to the technical field of papermaking rewinding machine equipment, and in particular to a clamping device for a paper roll core. Background Art

[0002] The production process of large paper machines is that the paper rolls with an effective width of about 10M and a diameter of about 3M come out of the paper machine. After calendering, they enter the rewinder and are usually cut into rolls of paper with a diameter of more than 1M and a specific width. Part of them then enter the back end for sorting and are finally sold in the form of pallet reams or rolls of paper with a specific diameter.

[0003] The chuck specifically contacts both ends of the kraft paper core tube of the roll paper. The chuck lifts up the small paper roll to drive it to rotate. The lifted contact part is the swelling block. The action is very frequent and must be run for each roll of paper. In actual production, the chuck is treated as a consumable, which is expensive and has a very complicated structure. Summary of the invention

[0004] In a first aspect, an embodiment of the present application provides a clamping device for a paper roll core, the clamping device comprising:

[0005] The chuck sleeve has a mounting cavity in the middle and a mounting groove connecting the mounting cavity with the outside on the side wall;

[0006] A chuck core shaft is installed in the installation cavity and can reciprocate along the axial direction of the installation cavity under the action of external force;

[0007] An expansion block is installed in the installation groove, one side of the expansion block extends to the installation cavity and abuts against the chuck core shaft, and the expansion block can move radially along the installation cavity under the supporting action of the chuck core shaft, so that the side of the expansion block away from the installation cavity protrudes from the installation groove and is used to support the inner side wall of the paper core of the paper roll.

[0008] In some optional embodiments, the outer periphery of the chuck core shaft is provided with a first abutment bevel, and the expansion block is provided with a second abutment bevel. When the chuck core shaft moves axially along the installation cavity under the action of external force, the first abutment bevel abuts and cooperates with the second abutment bevel, thereby pushing the expansion block to move radially along the installation cavity.

[0009] In some optional embodiments, the clamping device further comprises an elastic member, one end of which is connected to the chuck sleeve, and the other end of which supports an axial end of the chuck core shaft.

[0010] In some optional embodiments, the clamping device further includes a mounting cover, wherein the mounting cover is disposed at one end of the mounting cavity, and the elastic member supports the mounting cover.

[0011] In some optional embodiments, there are multiple expansion blocks, which are evenly arranged along the radial direction of the chuck sleeve.

[0012] In some optional embodiments, the clamping device also includes an elastic reset member, the number of the elastic reset members is the same as the number of the expansion blocks and are arranged in a one-to-one correspondence, the elastic reset members are respectively connected to the chuck sleeve and the expansion block, the force exerted by the elastic reset member on the expansion block is opposite to the direction of the force exerted by the chuck core shaft on the expansion block, and is used to achieve the reset of the expansion block.

[0013] In some optional embodiments, the elastic return member is a torsion spring, a middle portion of the torsion spring is connected to the expansion block via a pin, and two ends of the torsion spring are respectively overlapped with the side walls of the installation cavity.

[0014] In some optional embodiments, the clamping device also includes a bracket and a driving unit, the chuck sleeve is fixedly connected to the bracket, the driving unit is arranged on the side of the bracket away from the chuck sleeve, the bracket is provided with a connecting hole, the chuck sleeve and the driving unit are respectively arranged corresponding to the two ends of the connecting hole, and the driving unit can support the chuck core shaft through the connecting hole, thereby driving the chuck core shaft to move.

[0015] In some optional embodiments, the driving unit includes a driving shaft and a driving assembly, wherein the driving assembly is connected to one end of the driving shaft and is used to drive the driving shaft to move axially, and the other end of the driving shaft is used to support the chuck core shaft.

[0016] In some optional embodiments, the driving assembly includes a connecting sleeve, a nut seat and a synchronous pulley, the connecting sleeve is fixedly connected to the bracket, the nut seat is arranged in the connecting sleeve and connected to the connecting sleeve through a bearing, the outer periphery of the driving shaft is provided with a thread, and is inserted in the nut seat and connected to the nut seat, the synchronous pulley is connected to the nut seat and is used to drive the nut seat to rotate, thereby driving the driving shaft to move axially.

[0017] The clamping device for the paper roll core provided in the embodiment of the present application can clamp paper cores of various sizes by designing a structure in which a clamping core shaft cooperates with an expansion block, and has the characteristics of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic cross-sectional view of the overall structure of an embodiment of a clamping device for a paper roll core of the present application;

[0020] Figure 2 This application Figure 1 A schematic structural diagram of the chuck mandrel in the embodiment;

[0021] Figure 3 This application Figure 1 A schematic diagram of the structure of the expansion block in the embodiment;

[0022] Figure 4 This application Figure 1 A schematic diagram of the structure of the installation cover in the embodiment;

[0023] Figure 5 This application Figure 1 A schematic structural diagram of an elastic reset member in an embodiment;

[0024] Figure 6 yes Figure 5 A schematic diagram of the structure of the elastic reset member from another perspective. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0026] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] The present application provides a clamping device for a paper roll core, see Figure 1 , Figure 1 It is a schematic cross-sectional view of the overall structure of an embodiment of a clamping device for a paper roll core of the present application, wherein the clamping device includes but is not limited to the following structures: a chuck sleeve 100 , a chuck core shaft 200 and a swelling block 300 .

[0029] Specifically, the chuck sleeve 100 is provided with a mounting cavity 110 in the middle, and a mounting groove 120 connecting the mounting cavity with the outside is provided on the side wall; the chuck core shaft 200 is installed in the mounting cavity 110, and can reciprocate along the axial direction of the mounting cavity 110 (the direction of the arrow X in the figure) under the action of external force. The expansion block 300 is installed in the mounting groove 120, and one side of the expansion block 300 extends to the mounting cavity 110 and abuts against the chuck core shaft 200. The expansion block 300 can move along the radial direction of the mounting cavity 110 (the direction of the arrow Y in the figure) under the supporting action of the chuck core shaft 200, so that the side of the expansion block 300 away from the mounting cavity 110 protrudes from the mounting groove 120 and is used to support the inner side wall of the paper core of the paper roll.

[0030] Optionally, the number of the expansion blocks 300 in this embodiment can be multiple, and they are evenly arranged along the radial direction of the chuck sleeve 100. The cross-sectional view in the figure only captures one of them. Specifically, there can be multiple, such as three, four, five, etc., which are not specifically limited here. The expansion block 300 and the mounting groove 120 of the chuck sleeve 100 are clearance-fitted, with a single-side clearance of about 0.1-0.2mm.

[0031] Optionally, please also refer to Figure 2 and Figure 3 , Figure 2 This application Figure 1 A schematic diagram of the structure of the chuck mandrel in the embodiment, Figure 3 This application Figure 1The structural diagram of the expansion block in the embodiment, wherein the chuck core shaft 200 includes a fixedly connected shaft rod 210 and a supporting portion 220, and the outer periphery of the supporting portion 220 is provided with a first abutting inclined surface 221; the expansion block 300 is provided with a second abutting inclined surface 310, when the chuck core shaft 200 moves along the axial direction of the installation cavity 110 (the direction of the arrow X in the figure) under the action of an external force, the first abutting inclined surface 221 on the chuck core shaft 200 abuts and cooperates with the second abutting inclined surface 310 on the expansion block 300, thereby pushing the expansion block 300 to move along the radial direction of the installation cavity 110 (the direction of the arrow Y in the figure). Please continue to refer to Figure 3 In this embodiment, the outer wall of the expansion block 300 is further provided with a threaded hole 320 , and the threaded hole 320 is used to temporarily cooperate and fix with an external installation screw during the installation process, thereby facilitating the disassembly process of the expansion block 300 .

[0032] Optionally, see Figure 1 The clamping device in this embodiment further includes an elastic member 400, one end of which is connected to the chuck sleeve 100, and the other end of which supports an axial end of the chuck core shaft 200. The elastic member 400 in this embodiment may be a compression spring.

[0033] Optionally, please also refer to Figure 1 and Figure 4 , Figure 4 This application Figure 1 Schematic diagram of the structure of the mounting cover in the embodiment. The clamping device in this embodiment also includes a mounting cover 500. The mounting cover 500 is arranged on one end of the mounting cavity 110. Specifically, the outer periphery of the mounting cover 500 is provided with a thread, which is threadedly connected with the inner wall of the end of the mounting cavity 110. The mounting cover 500 is provided with a positioning groove 510 on the side facing the mounting cavity 110, and one end of the elastic member 400 is supported on the bottom of the positioning groove 510.

[0034] Optionally, please also refer to Figure 1 , Figure 5 as well as Figure 6 , Figure 5 This application Figure 1 A schematic diagram of the structure of the elastic reset member in the embodiment, Figure 6 yes Figure 5 A structural schematic diagram of the elastic reset member from another perspective, wherein the clamping device in this embodiment also includes an elastic reset member 600, the number of the elastic reset members 600 is the same as the number of the expansion blocks 300 and is arranged one-to-one, the elastic reset member 600 is respectively connected to the chuck sleeve 100 and the expansion block 300, the force exerted by the elastic reset member 600 on the expansion block 300 is opposite to the direction of the force exerted by the chuck core shaft 200 on the expansion block 300, and is used to achieve the resetting of the expansion block 300.

[0035] Optionally, the elastic return member 600 in this embodiment can be a torsion spring, a torsion spring hole 610 is provided in the middle of the torsion spring and is connected to the pin hole 301 on the expansion block 300 through a pin shaft 601, and the two ends of the torsion spring are respectively overlapped on the side walls of the installation cavity 110.

[0036] Optionally, please also refer to Figure 1 The clamping device in this embodiment further includes a bracket 700 and a driving unit 800, wherein the chuck sleeve 100 is fixedly connected to the bracket 700, and the bracket 700 is used to drive the chuck sleeve 100 to rotate. The driving unit 800 is arranged on the side of the bracket 700 away from the chuck sleeve 100, and the bracket 700 is provided with a connecting hole 701. The chuck sleeve 100 and the driving unit 800 are respectively arranged corresponding to the two ends of the connecting hole 701. The driving unit 800 can hold the chuck core shaft 200 through the connecting hole 701, and then drive the chuck core shaft 200 to move. Among them, the chuck sleeve 100 and its internal structural parts as a whole can be detachably connected to the bracket 700, and the chuck can be replaced according to different working conditions.

[0037] Optionally, the driving unit 800 in this embodiment may include a driving shaft 810 and a driving assembly 820 , wherein the driving assembly 820 is connected to one end of the driving shaft 810 and is used to drive the driving shaft 810 to move axially, and the other end of the driving shaft 810 is used to support the chuck core shaft 200 .

[0038] Optionally, the driving assembly 820 in this embodiment includes a connecting sleeve 821, a nut seat 822 and a synchronous pulley 823, wherein the connecting sleeve 821 is fixedly connected to the bracket 700, the nut seat 822 is disposed in the connecting sleeve 821 and connected to the connecting sleeve 821 through a bearing 824, the outer periphery of the driving shaft 810 is provided with a thread, and is inserted in the nut seat 822 and connected to the nut seat 822, and the synchronous pulley 823 is connected to the nut seat 822 and is used to drive the nut seat 822 to rotate, thereby driving the driving shaft 810 to move axially. Among them, the synchronous pulley 823 can be connected to an external driving motor (not shown) through a synchronous belt.

[0039] Optionally, see Figure 1 The clamping device in this embodiment also includes a sealing ring 900 , which is disposed between the connecting sleeve 821 and the nut seat 822 and is sealed on the outer side of the bearing 824 .

[0040] The bracket 700 and the drive unit 800 are mainly responsible for the rotation of the chuck and providing the power for the chuck to withdraw from the web. The withdrawal of the chuck, that is, the contraction of the expansion block, is achieved by the drive shaft (which can be a ball screw) directly acting on the chuck core shaft, giving it a forward thrust to overcome the force of the main spring in the chuck sleeve. The forward force of the drive shaft comes from the fixed synchronous pulley on the nut seat. The synchronous pulley and the nut seat are cleverly connected during the design, which realizes the rotation of the synchronous belt and converts it into the linear motion of the screw. The nut seat is installed in the connecting sleeve through the bearing, and the connecting sleeve is connected to the rotating outer frame (bracket) through screws, which means that when the rotating outer frame drives the chuck to rotate, the nut seat and the screw remain stationary. When the web reaches a certain outer diameter and stops as a whole, the belt drives the synchronous pulley to start working and withdraw the chuck from the web.

[0041] In actual operation, due to the different paper types, gram weights, and outer diameters of the rolls, the rotational inertia is different, and the clamping force of the chuck expansion block can only be higher than the inertia to achieve smooth operation such as emergency stop and start. Therefore, when working with special rolls, the personnel only need to prepare an Allen wrench to disassemble the chuck head as a whole, and install the pre-prepared chuck head to correspond to the special roll paper, so that the equipment can reach the best state.

[0042] The clamping device for the paper roll core provided in the embodiment of the present application can clamp paper cores of various sizes by designing a structure in which a clamping core shaft cooperates with an expansion block, and has the characteristics of simple structure and low cost.

[0043] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A clamping device for a paper roll core, characterized in that: The clamping device comprises: The chuck sleeve has a mounting cavity in the middle and a mounting groove connecting the mounting cavity with the outside on the side wall; A chuck core shaft is installed in the installation cavity and can reciprocate along the axial direction of the installation cavity under the action of external force; An expansion block is installed in the installation groove, one side of the expansion block extends to the installation cavity and abuts against the chuck core shaft, and the expansion block can move radially along the installation cavity under the supporting action of the chuck core shaft, so that the side of the expansion block away from the installation cavity protrudes from the installation groove and is used to support the inner side wall of the paper core of the paper roll.

2. The clamping device according to claim 1, characterized in that: The outer periphery of the chuck core shaft is provided with a first abutment slope, and the expansion block is provided with a second abutment slope. When the chuck core shaft moves axially along the installation cavity under the action of external force, the first abutment slope abuts and cooperates with the second abutment slope, thereby pushing the expansion block to move radially along the installation cavity.

3. The clamping device according to claim 1, characterized in that: The clamping device also includes an elastic member, one end of which is connected to the chuck sleeve, and the other end of which supports an axial end of the chuck core shaft.

4. The clamping device according to claim 3, characterized in that: The clamping device also includes a mounting cover, which is disposed on one end of the mounting cavity, and the elastic member supports the mounting cover.

5. The clamping device according to claim 1, characterized in that: The number of the expansion blocks is multiple and they are evenly arranged along the radial direction of the chuck sleeve.

6. The clamping device according to claim 5, characterized in that: The clamping device also includes an elastic reset member, the number of which is the same as the number of the expansion blocks and is arranged in a one-to-one correspondence. The elastic reset member is respectively connected to the chuck sleeve and the expansion block. The force exerted by the elastic reset member on the expansion block is opposite to the direction of the force exerted by the chuck core shaft on the expansion block, so as to achieve the reset of the expansion block.

7. The clamping device according to claim 6, characterized in that: The elastic reset member is a torsion spring, the middle part of which is connected to the expansion block through a pin, and the two ends of which are respectively overlapped with the side walls of the installation cavity.

8. The clamping device according to claim 1, characterized in that: The clamping device also includes a bracket and a driving unit. The chuck sleeve is fixedly connected to the bracket. The driving unit is arranged on a side of the bracket away from the chuck sleeve. The bracket is provided with a connecting hole. The chuck sleeve and the driving unit are respectively arranged corresponding to the two ends of the connecting hole. The driving unit can support the chuck core shaft through the connecting hole, thereby driving the chuck core shaft to move.

9. The clamping device according to claim 8, characterized in that: The driving unit comprises a driving shaft and a driving assembly. The driving assembly is connected to one end of the driving shaft and is used to drive the driving shaft to move axially. The other end of the driving shaft is used to support the chuck core shaft.

10. The clamping device according to claim 9, characterized in that: The driving assembly includes a connecting sleeve, a nut seat and a synchronous pulley. The connecting sleeve is fixedly connected to the bracket. The nut seat is arranged in the connecting sleeve and connected to the connecting sleeve through a bearing. The outer periphery of the driving shaft is provided with a thread and is inserted in the nut seat and connected to the nut seat. The synchronous pulley is connected to the nut seat and is used to drive the nut seat to rotate, thereby driving the driving shaft to move axially.

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