A stretching and wrinkle-removing pressure roller

Abstract

The present invention discloses a stretching and wrinkle-removing pressure roller. Two separated cylindrical surface deformation adjustment units are symmetrically arranged along the axis direction of the roller shaft inside the cylindrical surface capable of elastic deformation. The cylindrical surface deformation adjustment unit includes a moving adjustment tube, which is coaxially assembled with the roller shaft and can move along the axis direction of the roller shaft. The first sleeve is coaxially located on the side of the moving adjustment tube, and the second sleeve is coaxially located outside the first sleeve. The inner ends of the first sleeve and the second sleeve respectively have a first multi-tooth cam and a second multi-tooth cam. The bottom ends of a plurality of first support rods and second support rods arranged along the radial direction of the roller shaft abut against the outer peripheral surfaces of the first multi-tooth cam and the second multi-tooth cam. The front ends of the first support rod and the second support rod respectively have rod caps, and the rod caps contact the inner surface of the cylindrical surface to form a support for the cylindrical surface. When the first multi-tooth cam and the second multi-tooth cam rotate, the first support rod and the second support rod move in the radial direction of the roller shaft, so that the slope of the convex surface in the corresponding area of the cylindrical surface changes. The present invention can adjust the cylindrical surface of the pressure roller in real time according to the state of the tab.

Description

Technical Field

[0001] The present invention relates to the technical field of pole piece pressing rollers, and particularly to a stretching and wrinkle-removing pressing roller. Background Art

[0002] When a lithium battery pole piece is roll-pressed, there will be a certain degree of extension. Due to the inconsistent extension rates in the coating area and the bare foil area, stress lines are likely to occur. Therefore, it is necessary to stretch the pole piece. Currently, in the industry, when stretching the pole piece, most still use the method of pasting Teflon on the blank area of the tab on the stretching roller for stretching, so as to make the extension of the blank area of the tab consistent with the extension after roll-pressing of the coating area and achieve the purpose of eliminating stress lines. For example, CN2017218596348 discloses a roll-pressing device for a lithium battery pole piece, providing a method and application for preventing the tab of the lithium battery pole piece from wrinkling during roll-pressing. The polytetrafluoroethylene tape is cut according to the width of the tab of the pole piece, and then wound around the guide roller according to the position of the tab of the pole piece. This method can ensure the anti-wrinkle effect in the tab area, reduce potential safety hazards and the risk of tape breakage, and improve production efficiency. However, this method requires manual pasting of Teflon, which has high requirements for the manual operation method and the thickness of the pasted Teflon, and is time-consuming and laborious in the process, and is not suitable for experimental production lines with frequent product changes. Summary of the Invention

[0003] The purpose of the present invention is to address the technical deficiencies existing in the prior art, and to provide a stretching and wrinkle-removing pressing roller, aiming to solve the problems of great difficulty and low efficiency in manually pasting Teflon when stretching the pole piece in the prior art.

[0004] The technical solution adopted to achieve the purpose of the present invention is as follows:

[0005] A stretching and wrinkle-removing pressure roller includes a cylindric surface capable of elastic deformation. Inside the cylindric surface, two separated cylindric surface deformation adjustment units are symmetrically arranged along the axis direction of the roller shaft. The cylindric surface deformation adjustment unit includes a first sleeve, a second sleeve, and a moving adjustment tube. The moving adjustment tube is coaxially assembled with the roller shaft and can move and adjust its position along the axis direction of the roller shaft. The first sleeve is coaxially assembled outside the moving adjustment tube, and the second sleeve is coaxially assembled outside the first sleeve and can rotate relative to the first sleeve. The inner ends of the first sleeve and the second sleeve each have a first multi-tooth cam and a second multi-tooth cam, and the first multi-tooth cam and the second multi-tooth cam are adjacent. The bottom ends of a plurality of first support rods arranged in the radial direction of the roller shaft abut against the outer peripheral surface of the first multi-tooth cam, and the bottom ends of a plurality of second support rods arranged in the radial direction of the roller shaft abut against the outer peripheral surface of the second multi-tooth cam. The front ends of the first support rod and the second support rod each have a rod cap, and the rod cap contacts the inner surface of the cylindric surface to form a support for the cylindric surface. When the first multi-tooth cam and the second multi-tooth cam rotate, the first support rod and the second support rod move in the radial direction of the roller shaft, so that the corresponding area of the cylindric surface changes conformably, and the slope of the convex surface of the corresponding area of the cylindric surface changes.

[0006] Wherein, the first support rod and the second support rod are installed by a loop bracket. The outer end of the loop bracket is fixed to the moving adjustment tube, and the other end is tangent to the second sleeve through a connected bearing and forms a sliding connection. The first support rod and the second support rod are each limited and installed by the upper and lower two loops at the front end of the loop bracket.

[0007] Wherein, a first tension spring is sleeved on the rod body of the first support rod between the two loops that limit and install it, and a second tension spring is sleeved on the rod body of the second support rod between the two loops that limit and install it.

[0008] Wherein, the first multi-tooth cam and the second multi-tooth cam are multi-tooth cams with equal outer diameters, and the tooth surface structures and shapes on the outer peripheral surfaces are the same.

[0009] Wherein, each tooth part of the first multi-tooth cam corresponds to a first support rod, and each tooth part of the second multi-tooth cam corresponds to a second support rod.

[0010] Wherein, a support disc is provided at each end of each cylindric surface deformation adjustment unit. The cylindric surface is arranged outside the four support discs, and the two cylindric surface deformation adjustment units are wrapped inside.

[0011] Wherein, the two support discs at both ends of each cylindric surface deformation adjustment unit are connected by a plurality of connecting rods uniformly arranged outside the center of the support disc, and the axis direction of the connecting rod is the same as the axis direction of the roller shaft.

[0012] Among them, after the position of the movable adjustment tube is adjusted, it is fixed to the roller shaft by bolts.

[0013] Among them, a gear is installed on the outer section of the end of the stretching and wrinkle-removing pressure roller for the first sleeve, and it meshes with the driving gear driven by the motor through the gear.

[0014] Among them, the outer section of the roller shaft is fixedly connected to the support frame, so as to support the stretching and wrinkle-removing pressure roller at a predetermined height.

[0015] The stretching and wrinkle-removing pressure roller of the present invention can effectively adjust the convex slope and degree of the pressure cylinder surface by using two sets of multi-tooth cams, better stretch the pole piece, and avoid the problems of uneven stretching stress and insufficient extension degree of the pole ear caused by the slope problem of the cylinder surface. Moreover, its cylinder surface can be adjusted in real time according to the state of the pole ear. The time for adjusting the cylinder surface during shutdown is short, and it is convenient and fast. Almost no consideration is given to the influence brought by shutdown. There is no need to paste Teflon to stretch the pole ear, there is no requirement for manual operation, and the structure is simple.

[0016] For the stretching and wrinkle-removing pressure roller of the present invention, the first support rod, the second support rod and the tooth parts of the corresponding multi-tooth cams remain relatively stationary when the stretching and wrinkle-removing pressure roller is working; after the pole piece stretching work is completed, the multi-tooth cam rotates and adjusts to the non-stretching state, and the first support rod and the second support rod are driven by the stretching spring to reset to the non-stretching state; for the stretching and wrinkle-removing pressure roller of the present invention, when its stretching function is not used, the first support rod and the second support rod are kept at the low position of the tooth part of the multi-tooth cam and in the non-stretching state, and the function of ordinary roller passing can be realized. Brief Description of the Drawings

[0017] Figure 1 It is an overall schematic diagram of the stretching and wrinkle-removing pressure roller of the embodiment of the present invention installed on the bracket.

[0018] Figure 2 It is Figure 1 the front elevation sectional view of

[0019] Figure 3 It is the left elevation sectional view of the stretching and wrinkle-removing pressure roller of the embodiment of the present invention.

[0020] Figure 4 It is an isometric schematic diagram of the first support rod arranged outside the first multi-tooth cam of the embodiment of the present invention.

[0021] Figure 5 It is Figure 4 the left view of

[0022] Figure 6 It is a schematic diagram of the first multi-tooth cam, the second multi-tooth cam, the first support rod and the second support rod assembled on the roller shaft in the embodiment of the present invention.

[0023] Figure 7 Left - view enlarged schematic diagram of the arrangement of the first support rod on the outside of the first multi - tooth cam in the embodiment of the present invention. Detailed implementation manners

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] As Figures 1 to 7 shown, the stretching and wrinkle - removing pressure roller 100 of the embodiment of the present invention includes a barrel surface 10 capable of elastic deformation. Two separated barrel - surface deformation adjustment units 14 are symmetrically arranged along the axis direction of the roller shaft 18 inside the barrel surface 10. Each barrel - surface deformation adjustment unit 14 includes a first sleeve 16, a second sleeve 17, and a moving adjustment tube 15. The moving adjustment tube 15 is coaxially assembled with the roller shaft 18 and can move and adjust its position along the axis direction of the roller shaft 18, thereby driving the overall adjustment of the position of the barrel - surface deformation adjustment unit 14. The first sleeve 16 is coaxially assembled outside the moving adjustment tube 15, the second sleeve 17 is coaxially assembled outside the first sleeve 16, and the second sleeve 17 and the first sleeve 16 can rotate relative to each other. The inner ends of the first sleeve 16 and the second sleeve 17 respectively have a first multi - tooth cam 161 and a second multi - tooth cam 171, and the first multi - tooth cam 161 and the second multi - tooth cam 171 are adjacent. The bottoms of a plurality of first support rods 19 arranged in the radial direction of the roller shaft are in contact with the outer peripheral surface of the first multi - tooth cam 161, and the bottoms of a plurality of second support rods 20 arranged in the radial direction of the roller shaft are in contact with the outer peripheral surface of the second multi - tooth cam 171. The front ends of the first support rod 19 and the second support rod 20 respectively have a first rod cap 191 and a second rod cap 201, and the first rod cap and the second rod cap are in contact with the inner surface of the barrel surface to form a support for the barrel surface 10. When the first multi - tooth cam 161 and the second multi - tooth cam 171 rotate, the first support rod 19 and the second support rod 20 move up and down in the radial direction of the roller shaft, that is, the bottoms of the first support rod and the second support rod can move up and down in the radial direction with the rotation of the first multi - tooth cam and the second multi - tooth cam, so that the corresponding area of the barrel surface 10 changes conformally, and the slope of the convex surface of the corresponding area of the barrel surface changes.

[0026] Under the above embodiments, by adjusting the relative positions of the moving adjustment tube 15 and the roller shaft 18, the first multi-tooth cam and the second multi-tooth cam are adjusted to the positions where the pole piece needs to be stretched. By moving in the radial direction of the support rod, the cylindrical surface of the support cylinder also moves up and down, and the convexity of the cylindrical surface can be adjusted, which is equivalent to changing the diameter of the cylindrical surface at this time, and thus the tab at this place can be stretched. After adjusting the position, the position of the moving adjustment tube 15 is fixed by the four fixing bolts 22 in the radial direction of the moving adjustment tube. Through the design of the first multi-tooth cam and the second multi-tooth cam, the convexity slope and degree of the pressure roller cylindrical surface can be effectively adjusted, the pole piece can be stretched better, and the problems of uneven tab stretching stress and insufficient extension degree caused by the slope problem can be avoided. As a preferred embodiment, the first multi-tooth cam and the second multi-tooth cam are correspondingly arranged coaxially and fixed with the first sleeve and the second sleeve, and are sleeved on the outer wall of the first sleeve and the second sleeve.

[0027] In one embodiment, the motor 300 can be used as the power to drive the rotation of the first sleeve 16 of each cylindrical surface deformation adjustment unit 14, and at the same time drive the rotation of the second sleeve 17, so as to respectively adjust the rotation angles of the first multi-tooth cam 161 and the second multi-tooth cam 171 of the first sleeve and the second sleeve, and control the convexity slope and degree of the pressure roller cylindrical surface of the cylindrical surface, so that the function of extending the tab by pasting Teflon can be completely replaced.

[0028] In one embodiment, the first support rod and the second support rod are installed by the ring buckle bracket 21. The outer end of the ring buckle bracket 21 is fixed to the moving adjustment tube 15, and the other end is tangent to the second sleeve 17 through the connected bearing 25 and forms a sliding connection. The first support rod 19 and the second support rod 20 are respectively limited and installed by the upper and lower two ring buckles at the front end of the ring buckle bracket 21 and have freedom in the radial direction. Specifically, every two of the first support rods 19 and the second support rods 20 are correspondingly assembled on one ring buckle bracket 21, and a plurality of the ring buckle brackets 21 are arranged in the radial direction of the roller shaft, and have the same structure, the same shape and the same size.

[0029] In addition, a first tension spring 23 is sleeved on the rod body of the first support rod between the two ring buckles for installing it, and a second tension spring 24 is sleeved on the rod body of the second support rod between the two ring buckles for installing it. Through the first tension spring and the second tension spring, it can be ensured that the bottom ends of the connecting rods of the first support rod 19 and the second support rod 20 tightly contact the first multi-tooth cam 161 and the second multi-tooth cam 171 and do not deviate. After the pole piece stretching work is completed, the two multi-tooth cams are rotated and adjusted to the non-stretching state again, and the first support rod and the second support rod are restored to the non-stretching state by the first tension spring and the second tension spring; when the pole piece stretching function of the pressure roller is not used, keeping the first support rod and the second support rod in the non-stretching state can realize the function of ordinary passing through the roller.

[0030] In one embodiment, the first multi-tooth cam and the second multi-tooth cam are multi-tooth cams with the same outer diameter, and the tooth surface structures and shapes on the outer peripheral surface are the same. Preferably, only the thicknesses of the multi-tooth cams are different. In a specific implementation, their thicknesses can also be the same. Looking along the rotation direction, one end of each tooth part is low and the other end is high, and the low end and the high end are connected by a plane. And the high and low parts of adjacent tooth parts are connected to form a step or a Z-shaped structure, forming a special-shaped tooth part. See Figure 7 As shown in the special-shaped tooth part 162 of the first multi-tooth cam 16. Wherein, each tooth part of the first multi-tooth cam corresponds to one of the first support rods, and each tooth part of the second multi-tooth cam corresponds to one of the second support rods.

[0031] In one embodiment, a support disc 11 is provided at each end of each cylinder surface deformation adjustment unit. The cylinder surface 10 is arranged outside the four support discs 11, and the two cylinder surface deformation adjustment units 14 are wrapped inside. The cylinder surface 10 is also supported by the four support discs 11 through their circumferential surfaces, enhancing the support for the cylinder surface 10.

[0032] In one embodiment, two support discs 11 at both ends of each cylinder surface deformation adjustment unit 14 are connected by a plurality of connecting rods 12 evenly arranged outside the centers of the support discs. The axial direction of the connecting rods 12 is the same as the axial direction of the roller shaft 18. Through the arrangement of the connecting rods 12, the two support discs can be stably connected to form an integral support structure for the cylinder surface 10, enhancing the stability.

[0033] In one embodiment, a gear 14 is installed on the outer section of the first sleeve 16 at the end of the stretching and wrinkle-removing roller. The gear 13 meshes with a driving gear 400 driven by a motor 300. In this way, each cylinder surface deformation adjustment unit 14 is driven and controlled to rotate by the corresponding first sleeve 16, realizing separate and independent control of the two cylinder surface deformation adjustment units 14. According to needs, one of the cylinder surface deformation adjustment units can be controlled to rotate to perform deformation adjustment on the corresponding cylinder surface.

[0034] After adjusting the position of the moving adjustment tube, start the motor to rotate. The first multi-tooth cam and the second multi-tooth cam are driven to rotate together by the driving gear, so that the circumferential positions of the first multi-tooth cam and the second multi-tooth cam can be adjusted respectively. While the first multi-tooth cam and the second multi-tooth cam are rotating, the first support rod 19 and the second support rod 20 move up and down along the track of the cam teeth, thereby adjusting the relative positions of the first support rod 19 and the second support rod 20, and further adjusting the stretching lengths of the two support rods, changing the slope and degree of the convex surface of the cylinder surface protruding outward in the radial direction, making the convex surface smoother, more effectively supporting the tab, and thus realizing stretching of the tab passing through its surface.

[0035] In one embodiment, the motor 300 can also be remotely and automatically controlled by a controller, which can achieve non-stop adjustment of the degree and slope of the outward convex deformation of the roller surface in the radial direction, thus facilitating the control of the stretching tab. It can be set to calculate the degree and slope of the convex deformation of the roller surface of the pressure roller according to the rotation speed and number of turns of the driving gear driven by the motor or the gear on the roller shaft, and display it on the control panel. Then, further adjustment can be made according to the image to achieve non-stop adjustment of the tab.

[0036] Specifically, during implementation, the outer section of the roller shaft 18 is fixedly connected to the support frame 200, which supports the stretching and wrinkle-removing roller 100 at a predetermined height to perform the stretching process of the pole piece. The motor 300 can also be installed on the support frame 200.

[0037] During specific operation, according to the situation of the pole piece to be processed, the movable adjustment tube is slid on the roller shaft to drive the first sleeve and the second sleeve to move to the coating edge of the pole piece and be fixed. Then, the motor is driven to start, and by adjusting the rotation degrees of the first multi-tooth cam and the second multi-tooth cam, the convex degree and slope of the roller surface of the pressure roller are adjusted. After the adjustment is completed, the first multi-tooth cam and the second multi-tooth cam remain stationary. Then, the operation of stretching and removing wrinkles from the pole piece by the pressure roller begins. If wrinkles are found at the tab of the pressed pole piece at the pole piece winding place, it is caused by incomplete stretching of the tab. Then, the machine is stopped, the rotation degrees of the first multi-tooth cam and the second multi-tooth cam are adjusted, the roller surface of the pressure roller is continuously adjusted, and the machine is restarted to observe the state of the tab. In the same way, the convex degree and slope of the roller surface of the pressure roller are adjusted. The first multi-tooth cam and the second multi-tooth cam can be adjusted repeatedly until the roller surface form can stretch the tab well and then stop. After the adjustment is qualified, continuous production can be carried out.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms.

[0039] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention.

[0040] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stretching and wrinkle-removing pressure roller, characterized in that, It includes a cylindric surface capable of elastic deformation. Two spaced cylindric surface deformation adjustment units are symmetrically arranged inside the cylindric surface along the axis direction of the roller shaft. The cylindric surface deformation adjustment unit includes a first sleeve, a second sleeve and a moving adjustment tube. The moving adjustment tube is coaxially assembled with the roller shaft and can move and adjust its position along the axis direction of the roller shaft. The first sleeve is coaxially assembled outside the moving adjustment tube, and the second sleeve is coaxially assembled outside the first sleeve and can rotate relative to the first sleeve. The inner ends of the first sleeve and the second sleeve respectively have a first multi-tooth cam and a second multi-tooth cam, and the first multi-tooth cam and the second multi-tooth cam are adjacent. The bottoms of multiple first support rods arranged along the radial direction of the roller shaft are in contact with the outer peripheral surface of the first multi-tooth cam, and multiple second support rods arranged along the radial direction of the roller shaft have their bottoms in contact with the outer peripheral surface of the second multi-tooth cam. The front ends of the first support rod and the second support rod respectively have rod caps, and the rod caps are in contact with the inner surface of the cylindric surface to form a support for the cylindric surface. When the first multi-tooth cam and the second multi-tooth cam rotate, the first support rod and the second support rod move in the radial direction of the roller shaft, so that the corresponding area of the cylindric surface changes conformally, and the slope of the convex surface of the corresponding area of the cylindric surface changes.

2. The stretching and wrinkle-removing press roller according to claim 1, wherein, The first support rod and the second support rod are installed by a ring buckle bracket. The outer end of the ring buckle bracket is fixed to the moving adjustment tube, and the other end is tangent to the second sleeve through a connected bearing and forms a sliding connection. The first support rod and the second support rod are respectively limited and installed by the upper and lower two ring buckles at the front end of the ring buckle bracket.

3. The stretching and wrinkle-removing pressure roller according to claim 2, wherein A first tension spring is sleeved on the rod body of the first support rod between the two ring buckles that limit and install it, and a second tension spring is sleeved on the rod body of the second support rod between the two ring buckles that limit and install it.

4. The stretching and wrinkle-removing press roller according to claim 1, wherein, The first multi-tooth cam and the second multi-tooth cam are multi-tooth cams with equal outer diameters, and the tooth surface structures and shapes on the outer peripheral surfaces are the same.

5. The stretching and wrinkle-removing pressure roller according to claim 1, wherein, Each tooth part of the first multi-tooth cam corresponds to a first support rod, and each tooth part of the second multi-tooth cam corresponds to a second support rod.

6. The stretching and wrinkle-removing pressure roller according to claim 1, wherein A support disc is respectively arranged at both ends of each cylindric surface deformation adjustment unit. The cylindric surface is arranged outside the four support discs, and the two cylindric surface deformation adjustment units are wrapped inside.

7. The stretching and wrinkle-removing pressure roller according to claim 6, wherein Between the two support discs at both ends of each cylindric surface deformation adjustment unit, they are connected by multiple connecting rods evenly arranged outside the center of the support disc, and the axis direction of the connecting rod is the same as the axis direction of the roller shaft.

8. The stretching and wrinkle-removing pressure roller according to claim 1, wherein, After the position of the moving adjustment tube is adjusted, it is fixed to the roller shaft by bolts.

9. The stretching and wrinkle-removing press roller according to claim 1, wherein A gear is installed on the outer section of the first sleeve at the end of the stretching and wrinkle-removing roller, and it meshes with the driving gear driven by the motor through the gear.

10. The stretching and wrinkle-removing pressure roller according to claim 1, wherein The outer section of the roller shaft is fixedly connected to the support frame, so as to support the stretching and wrinkle-removing roller at a predetermined height.

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