A non-constant pitch thread flattening roll

Abstract

The utility model relates to thread flattening roller technical field especially a non equal pitch thread flattening roller, include: roller body and install the connecting assembly at the both ends of roller body, in the outer periphery of roller body two helical portions are distributed along the axis symmetry, wherein, the helical portion includes a plurality of thread opening in the outer periphery of roller body helical groove, a plurality of helical groove circumferential equidistance distribution, the helical groove pitch gradually increases non equidistant distribution from inside to outside along the roller body axis, the utility model discloses the roller body surface of thread flattening roller two helical portions along the axis symmetry, its pitch adopts gradually increasing non equidistant distribution mode from the middle of roller body to both sides to adapt lithium battery zebra coating pole piece, when pole piece and this non equidistant thread flattening roller contact, the thread of roller body both sides larger pitch to pole piece blank area outside side exert stronger outward expansion force, the thread of inside smaller pitch exerts weaker expansion force, forms the stress difference.

Description

Technical Field

[0001] This utility model relates to the field of threaded flattening roller technology, and in particular to a non-equidistant threaded flattening roller. Background Technology

[0002] Threaded flattening rollers are key flattening equipment in industries such as textiles, papermaking, film, and lithium batteries. They are used to eliminate wrinkles generated during the production and processing of roll materials, achieving uniform unfolding. Their working principle is as follows: left-handed and right-handed threads are symmetrically distributed along the axis of the roller body. When the substrate comes into contact with the threads, friction and the inclined thread structure together exert a force that expands to both sides on the substrate, thus completing the flattening. Some models employ a design where a rubber strip is embedded in the aluminum alloy roller body; rotating the rubber strip enhances the lateral stretching effect.

[0003] In existing technologies, the thread pitch of threaded flattening rollers is designed with "equal spacing," and the pitch value or thread shape is adjusted only according to the characteristics of the substrate, such as thickness and material. Theoretically, this design ensures that the outward expanding force per unit size remains consistent when the substrate moves from the middle to both sides, thus providing a better flattening effect for rolls with "blank areas in the middle."

[0004] However, in specialized industries such as lithium batteries, the coils that need to be flattened are often multi-segment blank structures (such as zebra-coated electrode sheets). In this case, the defects of the equidistant thread layout become apparent: for the blank areas on both sides of the coil, since the flattening force per unit distance applied by the equidistant threads is consistent, the outward expansion force on both sides of the blank area tends to be balanced. It can only rely on the frictional difference caused by the thickness difference between the substrate and the threads to produce a weak flattening effect, resulting in poor flattening effect of the blank areas on both sides, which cannot meet the requirements of high-precision production. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the weak flattening effect that can only be produced by the frictional difference caused by the thickness difference between the substrate and the thread, resulting in poor flattening effect in the blank areas on both sides. Therefore, this invention proposes a non-equidistant thread flattening roller.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a non-uniform pitch thread flattening roller, including: Roll body and connecting components installed at both ends of the roller body; Two spiral sections are symmetrically distributed along the axis on the outer periphery of the roller body; The spiral portion includes multiple spiral grooves threaded on the outer periphery of the roller body, and the multiple spiral grooves are circumferentially distributed. The pitch of the spiral groove is distributed non-equidistantly, gradually increasing from the inside to the outside along the axis of the roller.

[0007] Furthermore, each of the spiral sections includes six spiral grooves; The grooves of the spiral section are symmetrically distributed in a figure-eight pattern from the middle of the roller body to both sides.

[0008] Furthermore, the spiral groove has a groove width of 2mm and a depth of 0.5mm.

[0009] Furthermore, the roller body includes a roller core and a roller sleeve fitted outside the roller core, the two ends of the roller core are open, and the connecting assembly is installed in the open structure.

[0010] Furthermore, the connection assembly includes a locking component and a flange; The end of the roller sleeve is formed with a ring-shaped recessed blank portion, the locking assembly is connected to the ring-shaped recessed blank portion, and a connecting shaft is fixedly installed on the end face of the flange.

[0011] Furthermore, the locking component includes: The bushing is placed in the open structure, and multiple locking rods are movably inserted into the outer circumference of the bushing by springs. Multiple locking holes are opened on the outer circumference of the roller core and the roller sleeve, and the ends of the locking rods are inserted between two opposite locking holes.

[0012] Furthermore, baffles are fixedly installed on both sides of the bushing, and an abutment plate is rotatably connected inside the bushing. An abutment notch adapted to the locking rod is opened on the outer side of the abutment plate. The center of the contact plate is fixedly mounted with a rotating shaft extending to the front of the baffle. A turntable is fixedly mounted at the end of the rotating shaft. A locking bolt is threaded to the outer side of the turntable. A waist-shaped hole adapted to the locking bolt is opened on the end face of the flange.

[0013] Furthermore, a ring retainer is fixedly installed in the opening structure, and the flange, baffle, and bushing are fixedly connected to the ring retainer by fasteners.

[0014] The present invention proposes a non-equidistant thread flattening roller, the advantages of which are as follows: The roller body surface of the present invention has two spiral sections symmetrically distributed along the axis, and the pitch of the spiral sections is distributed in a non-equidistant manner that gradually increases from the middle of the roller body to both sides to adapt to the zebra-coated electrode sheet of lithium battery. When the electrode sheet comes into contact with the non-equidistant thread flattening roller, the larger pitch threads on both sides of the roller body apply a stronger outward expansion force to the outer side of the blank area of ​​the electrode sheet, while the smaller pitch threads on the inner side apply a weaker expansion force, forming a force difference, thereby fully stretching the blank area to the outside, eliminating wrinkles, and achieving a flattening effect superior to that of traditional equidistant thread rollers. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a top view of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure in cross section AA; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of area A; Figure 5 This is an exploded view of the connecting component of this utility model.

[0016] In the diagram: 1. Roller body; 11. Roller core; 12. Roller sleeve; 13. Circumferential constriction blank area; 14. Locking hole; 15. Ring stop; 2. Connecting assembly; 21. Locking assembly; 211. Liner ring; 212. Spring; 213. Locking rod; 214. Baffle; 215. Abutment plate; 216. Abutment notch; 217. Turntable; 218. Locking bolt; 22. Flange; 221. Waist-shaped hole; 23. Connecting shaft; 3. Spiral part; 31. Spiral groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-5 As an embodiment of the utility model, a non-equal pitch thread flattening roller is disclosed. Specifically, the flattening roller includes a roller body 1 and connecting components 2 installed at both ends of the roller body 1. The connecting components 2 are used to connect bearing seats and drive motors on the machine base, so as to achieve support and rotation drive for the flattening roller. Two spiral sections 3 are symmetrically distributed along the axis on the outer periphery of the roller body 1; The spiral part 3 includes a plurality of spiral grooves 31 threaded on the outer circumference of the roller body 1, that is, a plurality of spiral grooves 31 threaded on the outer circumference of the roller body 1; the plurality of spiral grooves 31 are circumferentially distributed; specifically, in this embodiment, the pitch of the spiral grooves 31 is distributed non-equally, gradually increasing from the inside to the outside along the axis of the roller body.

[0019] In other words, this invention changes the symmetrically distributed spiral section 3 along the axis from an equidistant distribution to a non-equidistant distribution. The pitch gradually increases from the middle of the roller body 1 towards both sides, and the pitch change pattern of the left and right spiral threads remains symmetrical. The advantage of this design is that it can change the stress state of the blank area of ​​the roll material. Because the outer thread pitch is larger, a stronger outward expansion force is applied to the outer side of the blank area; while the inner thread pitch is smaller, and the applied expansion force is relatively weak. This force difference of "outer pull and inner push" breaks the limitation of the balanced force on both sides under the traditional equidistant thread layout, significantly enhancing the flattening effect of the blank areas on both sides. It is particularly suitable for the flattening requirements of high-precision roll materials such as lithium battery zebra coated electrode sheets, and can effectively solve the limitations of traditional flattening rollers in high-precision applications.

[0020] In some embodiments, each of the spiral portions 3 in this invention includes six spiral grooves 31; the groove openings of the spiral portions 3 are symmetrically distributed in a figure-eight pattern along the middle of the roller body 1 to both sides. In addition, optionally, the groove opening width of the spiral grooves 31 in this embodiment is 2mm and the depth is 0.5mm.

[0021] Furthermore, in actual production, the increment of the thread pitch can be adjusted according to the width, blank space, and flattening requirements of different roll materials. For example, the thread pitch can be gradually transitioned from 200mm in the middle to 145mm on both sides, along with the number of thread turns and the groove size, to ensure that it is suitable for specific application scenarios.

[0022] Optionally, in this embodiment, the roller body 1 includes a roller core 11 and a roller sleeve 12 sleeved on the outside of the roller core 11. The two ends of the roller core 11 are open, and the connecting component 2 is installed in the open structure.

[0023] The connecting component 2 includes a locking component 21 and a flange 22; The end of the roller sleeve 12 is formed with a ring-shaped recessed blank portion 13. The locking component 21 is connected to the ring-shaped recessed blank portion 13. A connecting shaft 23 is fixedly installed on the end face of the flange 22. Specifically, in this embodiment, the connecting shaft 23 is used to connect the bearing seat and the drive motor. The locking component 21 is used to lock and limit the ring-shaped recessed blank portions 13 at both ends of the roller sleeve 12 to avoid the roller sleeve 12 from sliding laterally on the outside of the roller core 11. Specifically, in this embodiment, the roller sleeve 12 can be set as a rubber roller.

[0024] Based on the above embodiments, the locking component 21 in this embodiment includes: The bushing 211 is placed in the open structure. Multiple locking rods 213 are movably inserted into the outer periphery of the bushing 211 by spring 212. Multiple locking holes 14 are opened on the outer periphery of the roller core 11 and the roller sleeve 12. The end of the locking rod 213 is inserted between two opposite locking holes 14.

[0025] In addition, baffles 214 are fixedly installed on both sides of the bushing 211 in this embodiment, and an abutment plate 215 is rotatably connected inside the bushing 211. An abutment notch 216 adapted to the locking rod 213 is opened on the outer side of the abutment plate 215. The center of the contact plate 215 is fixedly mounted with a rotating shaft extending to the front of the baffle 214. The end of the rotating shaft is fixedly mounted with a turntable 217. The outer side of the turntable 217 is threaded with a locking bolt 218. A waist-shaped hole 221 adapted to the locking bolt 218 is opened on the end face of the flange 22.

[0026] In other words, when installing the roller sleeve 12 in this utility model, the locking rod 213 is first kept in the retracted state. After the roller sleeve 12 is fitted on the outside of the roller core 11, the locking bolt 218 can be rotated. When the locking bolt 218 slides inside the waist-shaped hole 221, it will drive the turntable 217 to rotate circumferentially. At this time, the turntable 217 will drive the abutment plate 215 to rotate circumferentially via the rotating shaft. The abutment notch 216 on the outer side of the abutment plate 215 is set as a slope structure. Therefore, when the abutment plate 215 rotates, it will move outward by abutting the locking rod 213 through the abutment slope and insert it between the locking hole 14 of the roller core 11 and the roller sleeve 12. At this time, rotate the locking bolt 218 so that the end of the locking bolt 218 abuts against the outer end of the flange 22, thereby completing the locking and fixing of the position of the locking rod 213 to maintain the stable connection between the roller sleeve 12 and the roller core 11.

[0027] It should be noted that in this embodiment, the opening structure is fixedly installed with a ring stop 15. The flange 22, baffle 214 and bushing 211 are fixedly connected to the ring stop 15 by fasteners. In this embodiment, during actual assembly, the locking component 21 is first placed into the opening structure and stopped by the ring stop 15. Then, the flange 22 is covered, and bolts are used as fasteners to pass through the flange 22, the front baffle 214, the bushing 211, the rear baffle 214 and the ring stop 15 in sequence. In this way, the installation of the entire baffle 214, roller core 11 and roller sleeve 12 can be completed.

[0028] In summary, the two spiral portions 3 symmetrically distributed along the axis on the surface of the roller body 1 of this utility model adopt a non-equidistant distribution with the pitch gradually increasing from the middle of the roller body to both sides to adapt to the zebra-coated electrode sheet of lithium battery. When the electrode sheet comes into contact with the non-equidistant spiral flattening roller, the threads with larger pitch on both sides of the roller body 1 apply a stronger outward expanding force to the outer side of the blank area of ​​the electrode sheet, while the threads with smaller pitch on the inner side apply a weaker expanding force, forming a force difference, thereby fully stretching the blank area to the outside, eliminating wrinkles, and achieving a flattening effect superior to that of traditional equidistant spiral rollers.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A non-uniform pitch thread flattening roller, characterized in that, include: Roller body (1) and connecting components (2) installed at both ends of roller body (1); Two spiral sections (3) are symmetrically distributed along the axis on the outer periphery of the roller body (1); The spiral part (3) includes a plurality of spiral grooves (31) with threads formed on the outer periphery of the roller body (1), and the plurality of spiral grooves (31) are circumferentially distributed; The pitch of the spiral groove (31) is distributed non-equidistantly, gradually increasing from the inside to the outside along the axis of the roller body.

2. The non-equidistant pitch thread flattening roller according to claim 1, characterized in that: Each of the spiral sections (3) includes six spiral grooves (31); The grooves of the spiral section (3) are symmetrically distributed in a figure-eight pattern from the middle of the roller body (1) to both sides.

3. A non-equidistant pitch thread flattening roller according to claim 1 or 2, characterized in that: The spiral groove (31) has a groove width of 2 mm and a depth of 0.5 mm.

4. A non-equidistant pitch thread flattening roller according to claim 1, characterized in that: The roller body (1) includes a roller core (11) and a roller sleeve (12) sleeved on the outside of the roller core (11). The two ends of the roller core (11) are open, and the connecting assembly (2) is installed in the open structure.

5. A non-equidistant pitch thread flattening roller according to claim 4, characterized in that: The connection assembly (2) includes a locking assembly (21) and a flange (22); The end of the roller sleeve (12) is formed with a ring-shaped blank portion (13), the locking assembly (21) is connected to the ring-shaped blank portion (13), and a connecting shaft (23) is fixedly installed on the end face of the flange (22).

6. A non-equidistant pitch thread flattening roller according to claim 5, characterized in that: The locking component (21) includes: The bushing (211) placed in the open structure has multiple locking rods (213) movably inserted into its outer periphery by a spring (212). Multiple locking holes (14) are opened on the outer periphery of the roller core (11) and the roller sleeve (12). The end of the locking rod (213) is inserted between two opposite locking holes (14).

7. A non-equidistant pitch thread flattening roller according to claim 6, characterized in that: Both sides of the bushing (211) are fixedly installed with baffles (214), and the inside of the bushing (211) is rotatably connected with a contact plate (215). The outer side of the contact plate (215) is provided with a contact notch (216) adapted to the locking rod (213). The center of the contact plate (215) is fixedly mounted with a rotating shaft extending to the front of the baffle (214), and the end of the rotating shaft is fixedly mounted with a turntable (217). The outer side of the turntable (217) is threaded with a locking bolt (218), and a waist-shaped hole (221) adapted to the locking bolt (218) is provided on the end face of the flange (22).

8. A non-equidistant pitch thread flattening roller according to claim 6, characterized in that: The opening structure is fixedly installed with a ring stop (15), and the flange (22), baffle (214) and bushing (211) are fixedly connected to the ring stop (15) by fasteners.

Images