Paper core ejector pin assembly and rewinding machine
By using a combined structure of active thimble and driven thimble in the rewinder, the paper core lock sleeve is driven to rotate about the axis, which solves the problem of insufficient rewinding force of passive paper core thimble, and improves the rewinding quality and paper core lock sleeve. Lifespan achieves more efficient rewinding effect.
Patent Information
- Application Number
- CN202420867714.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing passive paper core thimble cannot provide sufficient rewinding force, resulting in low rewinding quality, and it is easy to cause problems such as tilt, poor rotation, and wear after long-term use, which affects its life.
Adopt a combined structure of active thimble and driven thimble. The paper core lock sleeve is driven to rotate about the shaft through the transmission shaft and the driven shaft, providing higher rewinding force, and preventing tilt and wear through structures such as bearings and needle roller bearings, improving Rotational smoothness and load carrying capacity.
It improves the rewinding force, ensures that the paper roll is more compact and smooth, extends the service life of the paper core lock sleeve, avoids tilt and poor rotation, and improves the overall performance of the rewinding machine.
Smart Images
Figure CN222181235U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of papermaking machinery, in particular to a paper core ejector assembly and a rewinding machine. Background Art
[0002] The rewinder is a special equipment for paper, mica tape and film. It is used to rewind the paper rolls (called base paper rolls) produced by the papermaking machine in sequence. After rewinding, the paper becomes finished paper and leaves the factory. The paper core ejector is an important force-bearing component used to fix and support the paper core. The rewinder tightens the end of the ejector against the corresponding paper core so that the paper core can be rotatably supported on the frame. The paper core ejector supports the paper core to rotate around the paper web.
[0003] At present, the commonly used rewinding machines are mostly double bottom roller rewinding machines. The driving mode of the paper core ejector is passive (such as publication number CN212292145U). A bottom roller is provided under the ejector. During rewinding, the paper core is tightened by two oppositely arranged paper core ejectors, and the rewinding force is provided by the rotation of the bottom roller. The paper core ejector rotates around the axis driven by the paper core to realize the rewinding work.
[0004] However, the existing passive paper core ejector cannot actively provide the rewinding force required for rewinding the paper roll. During the rewinding process, the paper roll is very likely to become loose and wrinkled due to insufficient rewinding force, resulting in low rewinding quality and affecting the quality of the finished paper. In addition, affected by the structure of the paper core ejector, as the rewound paper roll gradually increases, the gravity and impact on the paper core ejector will also increase accordingly. The paper core ejector is very likely to tilt, rotate poorly, wear, operate at high temperatures, and other problems during rotation, which seriously affects the life of the paper core ejector. Utility Model Content
[0005] In order to solve the technical problems in the above background technology that the existing paper core ejector pins cannot provide sufficient rewinding force, which affects the rewinding effect, and the paper core ejector pins are easily damaged, the utility model provides a paper core ejector pin assembly and a rewinding machine.
[0006] The technical solution of this utility model is as follows:
[0007] The utility model provides a paper core ejector assembly, comprising: a driven ejector, and also comprising an active ejector arranged opposite to the driven ejector, the active ejector and the driven ejector both comprising an ejector base, a transmission shaft being rotatably mounted in the ejector base of the active ejector, a driven shaft being rotatably mounted in the ejector base of the driven ejector, both ends of the transmission shaft passing through the ejector base and extending outward, one end of the driven shaft passing through the ejector base and extending outward, the extended ends of the transmission shaft and the driven shaft being respectively inserted into a hollow supporting shaft, one end of the hollow supporting shaft being fixedly mounted in the corresponding ejector base, each hollow supporting shaft being sleeved with a paper core locking sleeve, one end of the paper core locking sleeve being inserted into the corresponding ejector base, the other end of the paper core locking sleeve being connected to the corresponding transmission shaft and the ejector base through a transmission pressure plate. The ends of the driving shaft are fixedly connected, and bearings are arranged between the transmission shaft, the driven shaft and the corresponding hollow supporting shaft, and between the hollow supporting shaft and the corresponding paper core locking sleeve. A transmission gear is installed at the end of the transmission shaft away from the transmission pressure plate. The active ejector pin can drive the paper core locking sleeve to rotate around the shaft, thereby providing a higher rewinding force, making the rewound paper roll more compact and flatter, and improving the rewinding quality of the paper roll. The paper core locking sleeve is connected to the hollow supporting shaft by a bearing, and one end of the paper core locking sleeve is inserted into the ejector pin base, which can effectively limit the prying of the paper core locking sleeve, ensure the smoothness of the rotation around the shaft, avoid the problem of tilting and poor rotation of the paper core locking sleeve under the action of the gravity and impact of the paper roll, prevent the wear of the paper core locking sleeve, and increase the service life of the paper core locking sleeve.
[0008] Preferably, the paper core lock sleeve is rotatably connected to the corresponding hollow support shaft via a needle bearing, and a first spring retaining ring and a positioning ring are respectively provided at both ends of the needle bearing. The inner wall of the paper core lock sleeve is completely connected to the hollow support shaft via the needle bearing, so that there is no or very little cavity between the paper core lock sleeve and the hollow support shaft, so that the paper core lock sleeve can be completely supported by the needle bearing and the hollow support shaft, ensuring the support area and support strength, avoiding prying of the paper core lock sleeve, and improving the smoothness of rotation.
[0009] Preferably, tapered roller bearings and deep groove ball bearings are provided between the transmission shaft, the driven shaft and the corresponding hollow support shaft. The tapered roller bearings and the deep groove ball bearings are arranged in sequence along the axial direction. Locking nuts and locking plates are provided on the transmission shaft and the driven shaft. The locking nuts and locking plates tighten the tapered roller bearings and the deep groove ball bearings as a whole in the corresponding hollow support shaft. The transmission shaft and the driven shaft are supported by the tapered roller bearings and the deep groove ball bearings, which avoids vibration of the transmission shaft and the driven shaft, ensures smoothness of rotation around the axis, and improves radial and axial load-bearing capacity.
[0010] Preferably, disc springs are sleeved on the transmission shaft and the driven shaft, and one side of the disc spring is pressed against the tapered roller bearing and the deep groove ball bearing as a whole through a spacer sleeve. The use of the spacer sleeve avoids the obstruction of the locking plate, and the other side of the disc spring is in contact with the bearing cover, and the bearing cover is fixedly mounted on the corresponding ejector base.
[0011] Preferably, the transmission shaft passes through the bearing gland and a first skeleton oil seal is provided between the two, and a first O-ring is provided between the transmission gland and the corresponding ejector base.
[0012] Preferably, lubrication spaces are provided between the transmission shaft and the driven shaft and the corresponding ejector bases, between the transmission shaft and the driven shaft and the corresponding hollow support shafts, and between the paper core lock sleeve and the corresponding hollow support shaft, and all lubrication spaces on the same ejector are connected and sealed.
[0013] Preferably, an oil groove is provided between the ejector base and the paper core lock sleeve, and a second skeleton oil seal is installed in the oil groove. A lubrication hole is also provided on the ejector base, which broadens the lubrication method of the bearing and facilitates the lubrication and maintenance of all bearings.
[0014] Preferably, a second O-ring and a plurality of adjustment gaskets are installed between the transmission shaft, the driven shaft and the corresponding paper core lock sleeve, and the second O-ring and the plurality of adjustment gaskets are arranged in sequence along the axial direction.
[0015] Preferably, the transmission gear is fixedly mounted on the transmission shaft via a key and an elastic cylindrical pin.
[0016] The utility model provides a rewinding machine, comprising: at least one group of paper core ejector components, capable of rewinding a plurality of paper rolls at the same time.
[0017] It can be seen from the above technical solutions that the advantages of the utility model are:
[0018] 1. The active ejector pin can drive the paper core lock sleeve to rotate around the axis, thereby providing a higher rewinding force, making the rewound paper roll more compact and flatter, and improving the rewinding quality of the paper roll. The paper core lock sleeve is connected to the hollow support shaft through a bearing, and one end of the paper core lock sleeve is inserted in the ejector pin base, which can effectively limit the prying of the paper core lock sleeve and ensure the smoothness of the rotation around the axis, avoiding the problem of the paper core lock sleeve tilting and poor rotation under the action of the gravity and impact of the paper roll, preventing the wear of the paper core lock sleeve and increasing the service life of the paper core lock sleeve.
[0019] 2. The inner wall of the paper core lock sleeve is connected to the hollow support shaft through the needle bearing, so that there is no or very little cavity between the paper core lock sleeve and the hollow support shaft, so that the paper core lock sleeve can be completely supported by the needle bearing and the hollow support shaft, ensuring the support area and support strength, avoiding prying of the paper core lock sleeve, and improving the smoothness of rotation.
[0020] 3. Tapered roller bearings and deep groove ball bearings are provided between the transmission shaft, driven shaft and the corresponding hollow support shaft. The transmission shaft and driven shaft are supported by tapered roller bearings and deep groove ball bearings, which avoids the vibration of the transmission shaft and driven shaft, ensures the smoothness of rotation around the axis, and improves the radial and axial load bearing capacity.
[0021] 4. Lubrication spaces are provided between the transmission shaft and driven shaft and the corresponding ejector bases, between the transmission shaft and driven shaft and the corresponding hollow support shafts, and between the paper core lock sleeve and the corresponding hollow support shaft. All lubrication spaces on the same ejector are connected and sealed. Combined with the two lubrication positions on the ejector base, the lubrication methods can be effectively broadened to facilitate the lubrication and maintenance of all bearings. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a schematic cross-sectional structure diagram of an active ejector according to one or more embodiments of the present utility model;
[0024] Figure 2 It is a schematic cross-sectional structure diagram of a driven ejector according to one or more embodiments of the utility model;
[0025] The components represented by the reference numerals in the figure are:
[0026] 1. Ejector base; 2. First bearing pressure cover; 3. First skeleton oil seal; 4. First O-ring; 5. Disc spring; 6. Spacer sleeve; 7. Lock nut; 8. Locking plate; 9. Tapered roller bearing; 10. Deep groove ball bearing; 11. Hollow support shaft; 12. Second skeleton oil seal; 13. Paper core locking sleeve; 14. Needle roller bearing; 15. First spring retaining ring; 16. Positioning ring; 17. Second O-ring; 18. Adjusting gasket; 19. Second spring retaining ring; 20. Transmission pressure plate; 21. Countersunk bolt; 22. Transmission gear; 23. Key; 24. Elastic cylindrical pin; 25. Hexagon socket bolt; 26. Transmission shaft; 27. Driven shaft; 28. Second bearing pressure cover. DETAILED DESCRIPTION
[0027] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.
[0028] Example 1
[0029] In a typical implementation of the present invention, Figure 1-Figure 2 As shown, a paper core ejector assembly is proposed, comprising: an active ejector and a driven ejector arranged relatively and used in coordination, such as Figure 1 As shown, the active ejector includes an ejector base 1 and a transmission shaft 26. Both ends of the transmission shaft 26 pass through the ejector base 1 and extend outward. The transmission shaft 26 is rotatably connected to the ejector base 1. A transmission unit is installed at one end of the transmission shaft 26. The other end of the transmission shaft 26 is inserted into the hollow support shaft 11. The hollow support shaft 11 is a hollow structure with openings at both ends. One end of the hollow support shaft 11 is inserted into the ejector base 1. The hollow support shaft 11 and the ejector base 1 have an interference fit. The other end of the support shaft 11 extends outward from the ejector base 1, and a paper core locking sleeve 13 is sleeved on the hollow support shaft 11. The paper core locking sleeve 13 is used to support and position the paper core. The paper core locking sleeve 13 is rotatably connected to the hollow support shaft 11. One end of the paper core locking sleeve 13 is inserted into the ejector base 1, and the other end of the paper core locking sleeve 13 is fixedly connected to an end of the transmission shaft 26 away from the transmission unit through a transmission pressure plate 20, so that the paper core locking sleeve 13 can be driven to rotate around the axis under the action of the transmission shaft 26.
[0030] Specifically, the paper core locking sleeve 13 and the hollow support shaft 11 are rotatably connected via a needle bearing 14. The needle bearing 14 and the paper core locking sleeve 13 and the hollow support shaft 11 are transitionally fitted, and a first spring retaining ring 15 and a positioning ring 16 are respectively installed at both ends of the needle bearing 14. The first spring retaining ring 15 and the positioning ring 16 are both fixedly installed in the mounting groove on the inner wall of the paper core locking sleeve 13 to limit the position of the needle bearing 14 and its axial movement.
[0031] The length of the needle bearing 14 is the same as the length of the contact portion between the paper core locking sleeve 13 and the hollow support shaft 11, that is, the inner wall of the paper core locking sleeve 13 is connected to the hollow support shaft 11 through the needle bearing 14, and there is no or very little cavity between the paper core locking sleeve 13 and the hollow support shaft 11, so that the paper core locking sleeve 13 is fully supported by the hollow support shaft 11 and the needle bearing 14, and the end prying of the paper core locking sleeve 13 by the ejector base 1 is limited, thereby avoiding the problem of tilting and poor rotation of the paper core locking sleeve 13 under the action of the gravity and impact of the paper roll, preventing the wear of the paper core locking sleeve 13, and improving the service life of the paper core locking sleeve 13.
[0032] A tapered roller bearing 9 and a deep groove ball bearing 10 are provided between the transmission shaft 26 and the hollow support shaft 11. The tapered roller bearing 9 and the deep groove ball bearing 10 are both sleeved on the transmission shaft 26. The tapered roller bearing 9 and the deep groove ball bearing 10 are transitionally matched with the transmission shaft 26 and the hollow support shaft 11. The tapered roller bearing 9 and the deep groove ball bearing 10 are sequentially arranged along the axial direction of the transmission shaft 26.
[0033] A locking nut 7 is installed on the transmission shaft 26. The locking nut 7 is located on one side of the tapered roller bearing 9, and a locking plate 8 is provided between the locking nut 7 and the tapered roller bearing 9. The tapered roller bearing 9 and the deep groove ball bearing 10 are tightened in the bearing chamber inside the hollow support shaft 11 by the locking nut 7 and the locking plate 8 to limit the positions of the tapered roller bearing 9 and the deep groove ball bearing 10.
[0034] A disc spring 5 is also sleeved on the transmission shaft 26, and the disc spring 5 is in contact with the tapered roller bearing 9 through a spacer sleeve 6, so that the coaxiality of the tapered roller bearing 9 and the transmission shaft 26 is guaranteed by the disc spring 5, and the spacer sleeve 6 can avoid the obstruction of the locking plate 8; a bearing cover 2 is installed at the end of the ejector base 1 away from the hollow support shaft 11, and the first bearing cover 2 supports the disc spring 5. The first bearing cover 2 and the ejector base 1 are connected by a hexagon socket bolt 25, and a first O-ring 4 is provided between the first bearing cover 2 and the ejector base 1, and a first skeleton oil seal 3 is provided between the first bearing cover 2 and the transmission shaft 26 to ensure sealing.
[0035] Lubrication spaces are provided between the transmission shaft 26 and the ejector base 1 , between the transmission shaft 26 and the hollow support shaft 11 , and between the paper core lock sleeve 13 and the hollow support shaft 11 , and all the lubrication spaces are connected.
[0036] In this embodiment, an oil groove is provided between the ejector base 1 and the paper core lock sleeve 13, and a second skeleton oil seal 12 is installed in the oil groove, so that grease can be injected into the needle bearing 14 through the oil groove. At the same time, a lubrication hole is also provided on the ejector base 1, so that thin oil can be injected into the tapered roller bearing 9 and the deep groove ball bearing 10 for lubrication. Both grease and thin oil can lubricate all bearings, thereby broadening the lubrication method and facilitating the operation and maintenance of the bearings.
[0037] A second O-ring 17 and a plurality of adjustment washers 18 are provided between the transmission shaft 26 and the paper core lock sleeve 13. The second O-ring 17 and the plurality of adjustment washers 18 are mounted on the transmission shaft 26 and are arranged in sequence along the axial direction. A second spring retaining ring 19 is provided on the side of the adjustment washers 18 away from the second O-ring 17. The second spring retaining ring 19 is mounted on the transmission shaft 26. The second O-ring 17 is used to ensure the sealing between the transmission shaft 26 and the paper core lock sleeve 13 to avoid leakage of lubricating oil inside the hollow support shaft 11. On the one hand, the adjustment washers 18 can support the paper core lock sleeve 13. On the other hand, the number of the adjustment washers 18 can be adjusted to ensure that the second O-ring 17 is installed in the middle position of the paper core lock sleeve 13 to ensure the effectiveness of the seal. The transmission shaft 26 and the transmission pressure plate 20 are fixedly connected by countersunk bolts 21, and the transmission pressure plate 20 is snap-fitted and fixed on the paper core lock sleeve 13, so that the transmission shaft 26 can drive the paper core lock sleeve 13 to rotate through the transmission pressure plate 20.
[0038] It is understandable that, in other embodiments, the transmission pressure plate 20 may also be fixedly connected to the paper core locking sleeve 13 by means of a threaded connection, thereby improving the connection strength between the transmission pressure plate 20 and the paper core locking sleeve 13 and ensuring effective transmission of force.
[0039] The transmission unit includes a transmission gear 22 , which is fixedly mounted on a transmission shaft 26 via a key 23 and an elastic cylindrical pin 24 . The transmission shaft 26 can mesh with a gear on a driving mechanism (such as a driving motor) via the transmission gear 22 .
[0040] The structure of the driven ejector is similar to that of the active ejector, but the difference is that the ejector base 1 of the driven ejector has a driven shaft 27 inside, and no transmission unit is provided on the driven shaft 27. Figure 2 As shown, the driven ejector includes an ejector base 1 and a driven shaft 27, the driven shaft 27 is rotatably arranged in the ejector base 1, one end of the driven shaft 27 passes through the ejector base 1 and extends outward, and the extended end of the driven shaft 27 is inserted in the hollow support shaft 11, the hollow support shaft 11 is a hollow structure with openings at both ends, one end of the hollow support shaft 11 is inserted in the ejector base 1, and the hollow support shaft 11 and the ejector base 1 have an interference fit, the other end of the hollow support shaft 11 extends outward from the ejector base 1, a paper core locking sleeve 13 is sleeved on the hollow support shaft 11, the paper core locking sleeve 13 is used for supporting and positioning the paper core, the paper core locking sleeve 13 is rotatably connected to the hollow support shaft 11, one end of the paper core locking sleeve 13 is inserted in the ejector base 1, and the other end of the paper core locking sleeve 13 is fixedly connected to one end of the driven shaft 27 extending out of the ejector base 1 through the transmission pressure plate 20.
[0041] Specifically, the paper core locking sleeve 13 and the hollow support shaft 11 are rotatably connected via a needle bearing 14. The needle bearing 14 and the paper core locking sleeve 13 and the hollow support shaft 11 are transitionally fitted, and a first spring retaining ring 15 and a positioning ring 16 are respectively installed at both ends of the needle bearing 14. The first spring retaining ring 15 and the positioning ring 16 are both fixedly installed in the mounting groove on the inner wall of the paper core locking sleeve 13 to limit the position of the needle bearing 14 and its axial movement.
[0042] The length of the needle bearing 14 is the same as the length of the contact portion between the paper core locking sleeve 13 and the hollow support shaft 11, that is, the inner wall of the paper core locking sleeve 13 is connected to the hollow support shaft 11 through the needle bearing 14, and there is no or very little cavity between the paper core locking sleeve 13 and the hollow support shaft 11, so that the paper core locking sleeve 13 is fully supported by the hollow support shaft 11 and the needle bearing 14, and the end prying of the paper core locking sleeve 13 by the ejector base 1 is limited, thereby avoiding the problem of tilting and poor rotation of the paper core locking sleeve 13 under the action of the gravity and impact of the paper roll, preventing the wear of the paper core locking sleeve 13, and improving the service life of the paper core locking sleeve 13.
[0043] A tapered roller bearing 9 and a deep groove ball bearing 10 are provided between the driven shaft 27 and the hollow support shaft 11. The tapered roller bearing 9 and the deep groove ball bearing 10 are both sleeved on the driven shaft 27. The tapered roller bearing 9 and the deep groove ball bearing 10 are transitionally matched with the driven shaft 27 and the hollow support shaft 11. The tapered roller bearing 9 and the deep groove ball bearing 10 are sequentially arranged along the axial direction of the driven shaft 27.
[0044] A locking nut 7 is installed on the driven shaft 27, and the locking nut 7 is located on one side of the tapered roller bearing 9. A locking plate 8 is provided between the locking nut 7 and the tapered roller bearing 9. The tapered roller bearing 9 and the deep groove ball bearing 10 are tightened in the bearing chamber inside the hollow support shaft 11 by the locking nut 7 and the locking plate 8 to limit the positions of the tapered roller bearing 9 and the deep groove ball bearing 10.
[0045] A disc spring 5 is also sleeved on the driven shaft 27. The disc spring 5 contacts the tapered roller bearing 9 through a spacer sleeve 6, so that the coaxiality of the tapered roller bearing 9 and the driven shaft 27 is ensured by the disc spring 5. The spacer sleeve 6 can avoid the obstruction of the locking plate 8. A bearing cover 2 is installed at the end of the ejector base 1 away from the hollow support shaft 11. The bearing cover 2 supports the disc spring 5. The bearing cover 2 and the ejector base 1 are connected by a hexagon socket bolt 25. The second bearing cover 28 is a seal. A first O-ring 4 is provided between the second bearing cover 28 and the ejector base 1 to ensure the sealing.
[0046] Lubrication spaces are provided between the driven shaft 27 and the ejector base 1 , between the driven shaft 27 and the hollow support shaft 11 , and between the paper core lock sleeve 13 and the hollow support shaft 11 , and all the lubrication spaces are connected.
[0047] In this embodiment, an oil groove is provided between the ejector base 1 and the paper core lock sleeve 13, and a second skeleton oil seal 12 is installed in the oil groove, so that grease can be injected into the needle bearing 14 through the oil groove. At the same time, a lubrication hole is also provided on the ejector base 1, so that thin oil can be injected into the tapered roller bearing 9 and the deep groove ball bearing 10 for lubrication. Both grease and thin oil can lubricate all bearings, thereby broadening the lubrication method and facilitating the operation and maintenance of the bearings.
[0048] A second O-ring 17 and a plurality of adjustment washers 18 are provided between the driven shaft 27 and the paper core lock sleeve 13. The second O-ring 17 and the plurality of adjustment washers 18 are mounted on the driven shaft 27 and are arranged in sequence along the axial direction. A second spring retaining ring 19 is provided on the side of the adjustment washers 18 away from the second O-ring 17. The second spring retaining ring 19 is mounted on the driven shaft 27. The second O-ring 17 is used to ensure the sealing between the driven shaft 27 and the paper core lock sleeve 13 to avoid leakage of lubricating oil inside the hollow support shaft 11. On the one hand, the adjustment washers 18 can support the paper core lock sleeve 13. On the other hand, the number of the adjustment washers can be adjusted to ensure that the second O-ring 17 is installed in the middle position of the paper core lock sleeve 13 to ensure the effectiveness of the seal. The driven shaft 27 and the transmission pressure plate 20 are fixedly connected by countersunk bolts 21, and the transmission pressure plate 20 is snap-fitted and fixed on the paper core lock sleeve 13.
[0049] It is understandable that, in other embodiments, the transmission pressure plate 20 may also be fixedly connected to the paper core locking sleeve 13 by means of a threaded connection, thereby improving the connection strength between the transmission pressure plate 20 and the paper core locking sleeve 13 and ensuring effective transmission of force.
[0050] Example 2
[0051] In another typical embodiment of the utility model, a rewinding machine is proposed, including at least one group of paper core ejector assemblies, the paper core ejector assembly including an active ejector and a driven ejector, the active ejector and the driven ejector are arranged opposite to each other, and the transmission gear 22 on the active ejector is meshed with the gear of a driving mechanism (such as a driving motor) to drive the transmission shaft 26 to rotate through the driving mechanism, thereby driving the paper core locking sleeve 13 on the active ejector to rotate around the axis, and the paper core locking sleeve 13 can drive the paper core to rotate, so as to provide a higher rewinding force during the rewinding work, so that the rewound paper roll is more compact and flatter, and the rewinding quality of the paper roll is improved.
[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A paper core ejector assembly, comprising: The driven ejector is characterized in that it also includes an active ejector arranged opposite to the driven ejector, the active ejector and the driven ejector both include an ejector base (1), a transmission shaft (26) is rotatably mounted in the ejector base (1) of the active ejector, a driven shaft (27) is rotatably mounted in the ejector base (1) of the driven ejector, both ends of the transmission shaft (26) pass through the ejector base (1) and extend outward, one end of the driven shaft (27) passes through the ejector base (1) and extends outward, the extended ends of the transmission shaft (26) and the driven shaft (27) are respectively inserted into a hollow support shaft (11), one end of the hollow support shaft (11) is fixedly mounted In the corresponding ejector base (1), a paper core lock sleeve (13) is sleeved on each hollow support shaft (11), one end of the paper core lock sleeve (13) is inserted into the corresponding ejector base (1), and the other end of the paper core lock sleeve (13) is fixedly connected to the ends of the corresponding transmission shaft (26) and the driven shaft (27) through a transmission pressure plate (20), and bearings are provided between the transmission shaft (26), the driven shaft (27) and the corresponding hollow support shaft (11), and between the hollow support shaft (11) and the corresponding paper core lock sleeve (13), and a transmission gear (22) is installed at one end of the transmission shaft (26) away from the transmission pressure plate (20).
2. A paper core ejector assembly according to claim 1, characterized in that: The paper core lock sleeve (13) is rotatably connected to the corresponding hollow support shaft (11) via a needle bearing (14), a first spring retaining ring (15) and a positioning ring (16) are respectively provided at both ends of the needle bearing (14), and the inner wall of the paper core lock sleeve (13) is completely connected to the hollow support shaft (11) via the needle bearing (14).
3. A paper core ejector assembly according to claim 1, characterized in that: A tapered roller bearing (9) and a deep groove ball bearing (10) are arranged between the transmission shaft (26), the driven shaft (27) and the corresponding hollow support shaft (11); the tapered roller bearing (9) and the deep groove ball bearing (10) are arranged in sequence along the axial direction; a locking nut (7) and a locking plate (8) are arranged on the transmission shaft (26) and the driven shaft (27); the locking nut (7) and the locking plate (8) tighten the tapered roller bearing (9) and the deep groove ball bearing (10) as a whole in the corresponding hollow support shaft (11).
4. A paper core ejector assembly according to claim 3, characterized in that: The transmission shaft (26) and the driven shaft (27) are both sleeved with disc springs (5), one side of the disc spring (5) is pressed against the tapered roller bearing (9) and the deep groove ball bearing (10) as a whole through a spacer sleeve (6), and the other side of the disc spring (5) is in contact with a bearing pressure cover, which is fixedly mounted on a corresponding ejector base (1).
5. A paper core ejector assembly according to claim 4, characterized in that: The transmission shaft (26) passes through the bearing pressure cover and a first skeleton oil seal (3) is arranged between the two, and a first O-ring (4) is arranged between the transmission pressure cover and the corresponding ejector base (1).
6. A paper core ejector assembly according to claim 1, characterized in that: Lubrication spaces are provided between the transmission shaft (26) and the driven shaft (27) and the corresponding ejector base (1), between the transmission shaft (26) and the driven shaft (27) and the corresponding hollow support shaft (11), and between the paper core lock sleeve (13) and the corresponding hollow support shaft (11), and all the lubrication spaces on the same ejector are connected and sealed.
7. A paper core ejector assembly according to claim 1, characterized in that: An oil groove is provided between the ejector base (1) and the paper core lock sleeve (13), and a second skeleton oil seal (12) is installed in the oil groove. A lubrication hole is also provided on the ejector base (1).
8. A paper core ejector assembly according to claim 1, characterized in that: A second O-ring (17) and a plurality of adjustment washers (18) are installed between the transmission shaft (26), the driven shaft (27) and the corresponding paper core lock sleeve (13), and the second O-ring (17) and the plurality of adjustment washers (18) are arranged in sequence along the axial direction.
9. A paper core ejector assembly according to claim 1, characterized in that: The transmission gear (22) is fixedly mounted on the transmission shaft (26) via a key (23) and an elastic cylindrical pin (24).
10. A rewinding machine, characterized in that: include: At least one set of a paper core ejector pin assembly as claimed in any one of claims 1 to 9.