Paper roller center shaft with auxiliary tightening function

Abstract

The utility model relates to a paper roll middle shaft with an auxiliary tightening function, which comprises a mounting shell, bearings are respectively arranged on the front side and the rear side of the mounting shell and used for being connected with an external supporting component, a front-back axial driving disc is rotatably connected in the mounting shell, and a plurality of driving grooves are formed in the driving disc in a front-back penetrating manner in the circumferential direction. A follow-up rod is inserted into each driving groove, at the moment, the two axial ends of the follow-up rods are restrained to be inserted into the corresponding positioning grooves, and the distances between the two ends of the driving grooves and the central axis of the mounting shell are unequal, so that the distances between the multiple follow-up rods and the central axis of the mounting shell can be synchronously changed in the rotating process of the driving disc. Therefore, when the paper roller is arranged on the outer side of the device in a sleeving mode, thrust from inside to outside can be provided for the paper roller through the device, the paper roller is forced to restore the compact state again, and later processing is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of paper roller center shafts, in particular to a paper roller center shaft with an auxiliary tightening function. Background Art

[0002] In the actual paper production process, whether it is from raw materials to finished paper, or further processing of raw paper (printing, dyeing, coating and other processing steps), as long as it is a large batch of paper, it is often inseparable from the existence of the paper roller center shaft.

[0003] In practice, whether it is finished paper or further processed raw paper, it generally has a long length to meet the needs of commodity users, and after it is sold, it is further divided by its commodity users according to their needs. Therefore, in practice, in order to facilitate transportation, it is generally wound on the central axis of the paper roll.

[0004] However, the structure of the paper roller shaft in the prior art devices is relatively simple, and is generally focused on improving the structural strength or the rotation flexibility. It ignores the fact that in actual use, if the end of the paper is not fixed, the distance between adjacent layers of paper will inevitably increase as the use process continues, which makes the multiple layers of paper sleeved on the outside of the paper roller shaft appear loose, which is not only very unsightly, but also increases the friction resistance between adjacent paper layers when pulling the end of the paper, so that the operator must apply a greater pulling force to the end of the paper to use it normally, which inevitably increases the breakage rate of the paper.

[0005] Therefore, we believe that there is a need for a paper roller center shaft with an auxiliary tightening function that can provide additional supporting thrust for the paper from the inside to avoid an increase in the distance between adjacent paper layers. Summary of the invention

[0006] In view of the deficiencies in the prior art, the utility model proposes a paper roller center shaft with an auxiliary tightening function, which has the advantage of providing an outward thrust for the paper from the inside, assisting in reducing the distance between adjacent paper levels, thereby reducing the paper damage rate. It solves the problem that in the prior art device, if the processing process is not connected and the paper ends lack constraints, the distance between adjacent paper levels will increase, thereby increasing the paper damage rate.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A paper roller center shaft with auxiliary tightening function comprises a mounting shell, wherein the front and rear sides of the mounting shell are respectively coaxially rotatably connected with bearings, a front and rear axial driving disk is rotatably connected inside the mounting shell, a plurality of driving grooves are opened through the driving disk on the front and rear sides, and a follower rod is inserted in each driving groove, the distances between the two ends of each driving groove and the central axis of the mounting shell are unequal, and the inner wall of each driving groove has a smooth transition, a plurality of positioning grooves are opened through the front and rear sides of the mounting shell on the front and rear sides, the plurality of positioning grooves correspond to the plurality of follower rods one by one, the two axial ends of each follower rod are inserted in the corresponding positioning grooves, the two axial ends of each follower rod protrude from the mounting shell, and a connecting rod is sleeved on the part of each follower rod located outside the mounting shell, and two connecting rods sleeved on the outer sides of the two axial ends of a single follower rod are fixedly connected to an abutment plate on the side away from the central axis of the mounting shell.

[0009] Preferably, a follower gear is coaxially sleeved on the outer side of the driving disk, one side of the follower gear is meshingly connected with a driving gear, and the driving gear is rotatably connected to the mounting housing through a supporting shaft.

[0010] Preferably, each of the driving gears is a bevel gear structure, the central axis of the driving gear is perpendicular to the central axis of the mounting shell, each of the supporting shafts is a screw structure, the supporting shaft is fixedly connected to the corresponding driving gear, a locking nut is threaded on the outer side of the screw of each supporting shaft, and the locking nut and the screw head of each supporting shaft are located on the outside of the mounting shell.

[0011] Preferably, the transmission ratio between the driving gear and the driven gear is not equal to one, and the diameter of the driving gear is smaller than that of the driven gear.

[0012] Preferably, an elastic sleeve is sleeved on the outer side of the mounting shell, and a plurality of abutment plates abut against the inner side wall of the elastic sleeve at one end away from the central axis of the mounting shell.

[0013] Preferably, an elastic pad made of rubber is fixedly connected to one end of each abutment plate away from the central axis of the mounting shell, and the elastic pad abuts against the inner side wall of the elastic sleeve.

[0014] Preferably, each of the follower rods has internal threads at both axial ends, and the two axial ends of the follower rod are threadedly connected with limit nuts through the internal threads, and the limit nuts are located outside the mounting shell and abut against the mounting shell.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model cooperates with the driving groove and the positioning groove to synchronously change the distance between multiple follower shafts and the central axis of the installation shell during the rotation of the driving disk. This makes it possible for the paper roller to be provided with a thrust from the inside to the outside through the device when the paper roller is sleeved on the outside of the device, forcing the paper roller to return to a compact state, which is convenient for later processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the connection between the bearing and the mounting housing of the utility model;

[0019] Figure 3 This is a schematic diagram of the cooperation between the driving disc and the driving gear of the utility model;

[0020] Figure 4 This is a schematic diagram of the position relationship between the follower rod and the connecting rod of the utility model.

[0021] In the figure: 1. elastic sleeve; 2. bearing; 3. mounting housing; 4. elastic pad; 5. abutment plate; 6. driving disk; 7. driving groove; 8. driving gear; 9. locking nut; 10. supporting shaft; 11. positioning groove; 12. limiting nut; 13. follower rod; 14. connecting rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] Please refer to Figure 1-4 A paper roller center shaft with auxiliary tightening function includes a mounting shell 3, and the mounting shell 3 is the main part of the center shaft described in this application.

[0025] Specifically, the device is provided with a plurality of positioning grooves 11 running through the mounting shell 3 from front to back, and the central axis of each positioning groove 11 coincides with the diameter line of the mounting shell 3. Therefore, the follower rod 13 inserted into the positioning groove 11 can change the distance between the follower rod 13 and the central axis of the mounting shell 3 by sliding.

[0026] At this time, the matching sleeve is arranged outside the follower rod 13, which is equivalent to the distance between the end surface of the connecting rod 14 fixedly connected to the follower rod 13 and the central axis of the mounting shell 3 changes accordingly.

[0027] It should be noted that, in practice, the paper roller is sleeved on the outside of the mounting shell 3. Therefore, when the distance between the end face of the connecting rod 14 away from the central axis of the mounting shell 3 and the central axis of the mounting shell 3 increases, the connecting piece can be used to apply thrust to the paper roller to expand the diameter of the through hole in the middle of the paper roller, thereby reducing the gap between the stacked and wound papers for easy processing.

[0028] Furthermore, in the device, two connecting rods 14 sleeved on the outer sides of the two axial ends of the single follower rod 13 are fixedly connected to a contact plate 5 on the side away from the central axis of the mounting shell 3, so that the connecting rods 14 are prevented from directly contacting the paper roller, thereby preventing damage to the paper roller.

[0029] At the same time, the device has bearings 2 coaxially rotatably connected on the front and rear sides of the mounting shell 3, and the bearings 2 are used to connect to the external support frame. This allows the device to use friction to enable the mounting shell 3 to rotate with the paper roller when the abutment plate 5 abuts against the paper roller (the paper roller needs to be continuously rotated to release the paper during the processing process), that is, the abutment plate 5 remains stationary relative to the paper roller, avoiding relative movement between the abutment plate 5 and the paper roller to cause damage to the paper roller.

[0030] Furthermore, in order to enhance the friction between the device and the paper roller and further ensure that the paper roller can drive the mounting shell 3 to rotate, the device is provided with an elastic sleeve 1 on the outside of the mounting shell 3, and a plurality of abutment plates 5 abut against the inner wall of the elastic sleeve 1 at one end away from the central axis of the mounting shell 3, thereby utilizing the larger contact area between the elastic sleeve 1 and the paper roller to increase the friction resistance between the device and the paper roller.

[0031] At the same time, in the device, an elastic pad 4 made of rubber is fixedly connected to one end of each abutment plate 5 away from the central axis of the mounting shell 3. At this time, the elastic pad 4 abuts against the inner wall of the elastic sleeve 1, so that the elastic sleeve 1 is projected in a more rounded state on the vertical plane by utilizing the deformable characteristics of the elastic pad 4. This can further increase the contact area between the elastic sleeve 1 and the paper roller, and can also avoid the bulge that affects the shape of the paper roller.

[0032] Specifically, in order to control the position of the follower rod 13, that is, to control the diameter of the elastic sleeve 1, the device is provided with a drive disk 6 inside the mounting housing 3, and as shown in the figure, the drive disk 6 is rotatably connected to the mounting housing 3.

[0033] Therefore, by opening a plurality of driving grooves 7 through the front and rear sides of the driving disk 6, the plurality of driving grooves 7 correspond to the plurality of positioning grooves 11 one by one. At this time, the follower rod 13 is synchronously inserted into the driving groove 7. By constraining the distances between the two ends of the driving groove 7 and the central axis of the mounting shell 3 to be unequal, the inner wall of the driving groove 7 has a smooth transition. In combination with the constraint of the positioning groove 11 on the movement trajectory of the follower rod 13, the distance between the central axis of the follower rod 13 and the central axis of the driving disk 6 can be changed when the driving disk 6 is rotated, thereby achieving the purpose of changing the diameter of the elastic sleeve 1.

[0034] Specifically, the device is provided with a follower gear coaxially sleeved on the outer side of the driving disk 6, and one side of the follower gear is meshingly connected with the driving gear 8. The driving gear 8 is rotatably connected to the mounting shell 3 through the support shaft 10. Therefore, when the driving gear 8 is rotated, the follower gear can be driven synchronously, thereby driving the driving gear 8 to rotate.

[0035] Furthermore, as shown in the figure, the device constrains the transmission ratio between the driving gear 8 and the follower gear to be not equal to one, that is, the diameter of the driving gear 8 is smaller than the follower gear. This makes it possible for the driving gear 8 to only slowly drive the follower gear to rotate, that is, the diameter of the elastic sleeve 1 changes slowly. This can better adapt to the characteristics of the paper roller and avoid damage to the paper roller due to rapid changes.

[0036] Furthermore, in order to prevent the elastic sleeve 1 from always being in a state of smaller diameter due to the reaction force, the device constrains the support shaft 10 to be a screw structure, and the support shaft 10 is fixedly connected to the corresponding driving gear 8. Therefore, the rotation of the support shaft 10 can drive the driving gear 8 to rotate.

[0037] At this time, by screwing the locking nut 9 on the outer side of the screw rod of the support shaft 10, and the locking nut 9 and the screw head of each support shaft 10 are located on the outer side of the mounting housing 3, the clamping force between the locking nut 9 and the driving gear 8 on the mounting housing 3 can be used to prevent the support shaft 10, that is, the driving gear 8 from rotating as expected, thereby achieving a stop effect. At the same time, the screw head of the support shaft 10 also facilitates the operator to rotate the driving gear 8 through general equipment to drive the driving disk 6 to rotate.

[0038] Furthermore, the driving gear 8 is a bevel gear structure, that is, the central axis of the driving gear 8 is perpendicular to the central axis of the mounting shell 3. This allows the driving gear 8 to be located on the left and right sides of the mounting shell 3. Combined with the actual position of the paper roller, the position of the support shaft 10 at this time can be convenient for the operator to rotate.

[0039] One point that needs to be emphasized is that the two axial ends of the follower rod 13 of the utility model are respectively provided with internal threads, and the two axial ends of the follower rod 13 are screwed with the limiting nuts 12 through the internal threads. Therefore, by constraining the limiting nut 12 to be located on the outside of the mounting shell 3 and abutting against the mounting shell 3, the limiting nut 12 can be used to ensure that the position between the follower rod 13 and the mounting shell 3 is fixed, and the follower rod 13 will not be separated from the mounting shell 3, thereby ensuring the stable operation of the device.

[0040] In actual use, the utility model:

[0041] First, use a tool to clamp the screw head of one of the support shafts 10. At this time, rotate the locking nut 9 corresponding to the support shaft 10 synchronously to release the clamping effect of the locking nut 9 and the driving gear 8 on the mounting housing 3.

[0042] Then, the support shaft 10 is rotated, at which time the follower gear and the driving disc 6 rotate synchronously;

[0043] Finally, the number of rotations of the support shaft 10 is determined according to needs to ensure interference fit between the elastic sleeve 1 and the paper roller sleeved on the outside of the device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A paper roller center shaft with auxiliary tightening function, characterized in that: It comprises a mounting shell (3), and the front and rear sides of the mounting shell (3) are respectively coaxially rotatably connected with bearings (2); A front-to-rear axial drive disc (6) is rotatably connected inside the mounting housing (3), a plurality of drive slots (7) are formed on the circumference of the drive disc (6) from front to rear, and a follower rod (13) is inserted into each drive slot (7); The distances between the two ends of each driving groove (7) and the central axis of the mounting housing (3) are unequal, and the inner wall of each driving groove (7) has a smooth transition; A plurality of positioning grooves (11) are formed on the upper circumference of the mounting housing (3) from front to back, and the plurality of positioning grooves (11) correspond to the plurality of follower rods (13) one by one, and the two axial ends of each follower rod (13) are inserted into the corresponding positioning groove (11); The two axial ends of each follower rod (13) protrude from the mounting housing (3), and a connecting rod (14) is sleeved on the portion of each follower rod (13) located outside the mounting housing (3). The two connecting rods (14) sleeved on the outer sides of the two axial ends of the single follower rod (13) are fixedly connected to an abutment plate (5) on the side away from the central axis of the mounting housing (3).

2. The paper roller center shaft with auxiliary tightening function according to claim 1, characterized in that: A follower gear is coaxially sleeved on the outer side of the driving disc (6), one side of the follower gear is meshingly connected to a driving gear (8), and the driving gear (8) is rotationally connected to the mounting housing (3) via a support shaft (10).

3. The paper roller center shaft with auxiliary tightening function according to claim 2, characterized in that: Each of the driving gears (8) is a bevel gear structure, and the central axis of the driving gear (8) is perpendicular to the central axis of the mounting housing (3); Each of the support shafts (10) is a screw structure, and the support shaft (10) is fixedly connected to the corresponding driving gear (8); A locking nut (9) is threadedly connected to the outer side of the screw rod of each support shaft (10), and the locking nut (9) and the screw head of each support shaft (10) are located outside the mounting housing (3).

4. The paper roller center shaft with auxiliary tightening function according to claim 2, characterized in that: The transmission ratio between the driving gear (8) and the follower gear is not equal to one, and the diameter of the driving gear (8) is smaller than that of the follower gear.

5. The paper roller center shaft with auxiliary tightening function according to claim 1, characterized in that: An elastic shaft sleeve (1) is sleeved on the outer side of the installation shell (3), and a plurality of abutment plates (5) abut against the inner side wall of the elastic shaft sleeve (1) at one end away from the central axis of the installation shell (3).

6. The paper roller center shaft with auxiliary tightening function according to claim 5, characterized in that: Each of the abutment plates (5) is fixedly connected to an elastic pad (4) made of rubber material at one end away from the central axis of the mounting shell (3), and the elastic pad (4) abuts against the inner wall of the elastic shaft sleeve (1).

7. The paper roller center shaft with auxiliary tightening function according to claim 1, characterized in that: Each follower rod (13) has internal threads at its two axial ends. The follower rod (13) is threadedly connected to a limiting nut (12) at its two axial ends via the internal threads. The limiting nut (12) is located outside the mounting shell (3) and abuts against the mounting shell (3).

Images