Material belt conveying device and lithium battery production equipment

Abstract

The invention relates to a material belt conveying device and lithium battery production equipment. The material belt conveying device comprises a mounting frame, a passing roller, an adjusting air cylinder and a rotating joint. When the tension of the material belt wound around the passing roller is not uniform, the acting force applied to the passing roller by the material belt is different in the lengthwise direction of the passing roller, namely in the width direction of the material belt, and the passing roller is forced to swing relative to the mounting frame until the stress of the passing roller is balanced again, so that the tension in the width direction of the material belt is balanced. In the continuous change process of the tension, the restoring force applied to the passing roller by the adjusting air cylinder can enable the passing roller to be dynamically adjusted, so that the passing roller is kept in contact with all positions of the material belt in the width direction, and the stress of the passing roller is dynamically balanced. Therefore, the passing roller can adaptively adjust the angle according to the tension change of the material belt, so that the tension distribution of the material belt wound around the passing roller in the width direction is always kept uniform, and the material belt can be effectively prevented from wrinkling.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical automation, and particularly relates to a tape conveying device and a lithium battery production device. Background Art

[0002] In the actual production process, it is often necessary to use a guide roller to transition and guide a tape. For example, in the process of processing lithium battery cells, it is necessary to wind tape such as pole piece tape and separator tape around the guide roller to achieve the purposes of turning and tensioning. However, due to processing and installation errors of the guide roller, the tape is likely to have uneven tension distribution when winding around the guide roller, thereby causing the tape to wrinkle. Summary of the Invention

[0003] Based on this, it is necessary to provide a tape conveying device and a lithium battery production device that can effectively prevent the tape from wrinkling in view of the above problems.

[0004] A tape conveying device includes a mounting frame, a guide roller, two adjusting cylinders and two rotary joints. Both ends of the guide roller are respectively connected to the two rotary joints, and the two adjusting cylinders are respectively connected to both ends of the guide roller through the rotary joints for transmission.

[0005] In one embodiment, the rotary joint includes a first rotating shaft and a second rotating shaft. The first rotating shaft is connected to one end of the guide roller, the second rotating shaft is connected to the piston rod of the adjusting cylinder, and the cylinder body of the adjusting cylinder is fixed to the mounting frame.

[0006] In one embodiment, the rotary joint further includes a connecting body. The first rotating shaft and the second rotating shaft are installed on the connecting body. One end of the guide roller is rotatably installed on the connecting body through the first rotating shaft, and the piston rod is rotatably installed on the connecting body through the second rotating shaft.

[0007] In one embodiment, the rotary joint includes a third rotating shaft. The piston rod of the adjusting cylinder is connected to one end of the guide roller through the third rotating shaft. The tape conveying device further includes a rotating connecting piece, and the rotating connecting piece includes a fourth rotating shaft. The cylinder body of the adjusting cylinder is rotatably installed on the mounting frame through the fourth rotating shaft.

[0008] In one embodiment, the guide roller includes a roller body and a roller shaft. The roller body is rotatably sleeved on the roller shaft, and the roller shaft is connected to the rotary joint.

[0009] In one embodiment, it further includes a support and an adjusting mechanism. The adjusting mechanism includes a rotating shaft rotatably installed on the support, and the mounting frame is fixedly connected to the rotating shaft.

[0010] In one embodiment, the adjustment mechanism further includes a limit plate and a limit pin, wherein the limit plate is arranged at at least one end of the rotating shaft, and the limit plate is provided with a plurality of positioning holes distributed along the circumference, and the limit pin is telescopically mounted on the support and points to the limit plate.

[0011] A material belt conveying device includes a mounting frame, a roller, two adjustment cylinders and two rotating joints. The roller can rotate around a first rotation axis. Each of the adjustment cylinders includes a cylinder body and a piston rod. The cylinder body is installed on the mounting frame. The two ends of the roller are respectively connected to the two piston rods through the rotating joints, and the adjustment cylinder provides pulling force for the roller. The rotating joints allow the two ends of the roller to rotate relative to the piston rod so that the first rotation axis can swing within a swinging plane.

[0012] In one embodiment, the rotary joint includes a first rotating shaft and a second rotating shaft, the first rotating shaft is connected to one end of the roller, the second rotating shaft is connected to the piston rod, the first rotating shaft and the second rotating shaft are both perpendicular to the first rotation axis, and the cylinder body is fixed to the mounting frame; or,

[0013] The rotating joint includes a third rotating shaft, which is connected to one end of the roller. The material belt conveying device also includes a rotating connecting member, which includes a fourth rotating shaft. The third rotating shaft and the fourth rotating shaft are both perpendicular to the first rotation axis. The cylinder body is rotatably mounted on the mounting frame via the fourth rotating shaft.

[0014] A battery cell production device comprises a material belt conveying device as described in any one of the above optional embodiments.

[0015] In the above-mentioned material belt conveying device and lithium battery production equipment, when the tension of the material belt passing through the roller is uneven, the force applied by the material belt to the roller will be different in the longitudinal direction of the roller, that is, in the width direction of the material belt, and the roller will be forced to swing relative to the mounting frame until the force on the roller is balanced again, thereby balancing the tension in the width direction of the material belt. In the process of constantly changing tension, adjusting the restoring force applied by the cylinder to the roller can enable the roller to be dynamically adjusted, thereby maintaining contact with various locations in the width direction of the material belt and achieving dynamic balance of the force on the roller. It can be seen that the roller can adaptively adjust the angle according to the change in the tension of the material belt, so that the tension distribution of the material belt in the width direction after passing through the roller is always maintained uniform, so it can effectively prevent the material belt from wrinkling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of a tape conveying device in an embodiment of the present invention;

[0018] Figure 2 For Figure 1 Enlarged schematic diagram of part A in the shown tape conveying device;

[0019] Figure 3 For Figure 1 Simplified structural schematic diagram of the shown tape conveying device;

[0020] Figure 4 Simplified structural schematic diagram of a tape conveying device in another embodiment of the present invention;

[0021] Figure 5 For Figure 3 Or Figure 4 Force analysis schematic diagrams of the idler rollers in the shown tape conveying device under various working conditions. Detailed implementation manners

[0022] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will give a detailed description of the specific implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the 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 orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0027] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0028] Please refer to Figure 1 , the present invention provides a tape conveying device 10. In addition, the present invention also provides a battery cell production device (not shown in the figure), and the battery cell production device includes the above-mentioned tape conveying device 10.

[0029] The above-mentioned battery cell production equipment can be a winding machine, a die-cutting equipment or a cutting and stacking machine, and the material tape conveyor 10 is used to convey material tapes such as electrode material tapes or diaphragm material tapes, and can make the tension distribution of the material tape along the width direction more uniform after winding through the material tape conveyor 10, thereby effectively avoiding wrinkles in the material tape and improving the quality of the final battery cell.

[0030] The winding machine generally includes the above-mentioned material belt conveyor 10 and the winding needle mechanism. The pole piece material belt and the diaphragm material belt can be guided and transitioned by the material belt conveyor 10 and then enter the winding needle mechanism for winding, so it can effectively prevent the pole piece material belt and the diaphragm material belt from curling up or misaligning due to wrinkles, thereby helping to improve the quality of winding and preparing battery cells.

[0031] For the cutting and stacking machine, it generally includes the above-mentioned material belt conveying device 10 and a cutting device. The pole piece material belt enters the cutting device for slicing after being guided and transitioned by the material belt conveying device 10. The cutting device can cut the pole piece material belt into multiple pole pieces in sequence. Since the material belt conveying device 10 can effectively prevent the pole piece material belt from wrinkling, the cutting device can reduce the dimensional error when slicing the pole piece material belt. Moreover, the diaphragm material belt required for lamination can also enter the lamination station after being guided and transitioned by the material belt conveying device 10, so as to ensure the flatness of the surface of the diaphragm material belt, thereby avoiding the wrinkling of the battery cell after lamination. It can be seen that the cutting and stacking machine provided with the material belt conveying device 10 can also improve the quality of the battery cell prepared by lamination.

[0032] Please also read Figure 2 In one embodiment of the present invention, a material belt conveying device 10 includes a mounting frame 100 , a roller 200 , an adjustment cylinder 300 and a rotating joint 400 .

[0033] The mounting frame 100 is used to provide support for the roller 200 and the adjustment cylinder 300 and other components. The two ends of the roller 200 are respectively connected to the two adjustment cylinders 300 through the rotating joint 400. Each adjustment cylinder 300 includes a cylinder body 310 and a piston rod 320. The cylinder body 310 is installed on the mounting frame 100, and the two piston rods 320 are respectively connected to the two ends of the roller 200 through the rotating joint 400. The piston rod 320 can be extended and retracted relative to the cylinder body 310, and the adjustment cylinder 300 can apply a pulling force, i.e., a restoring force, to the roller 200 through the rotating joint 400.

[0034] Specifically, two adjustment cylinders 300 are spaced apart on the mounting frame 100, piston rods 320 of the two adjustment cylinders 300 are disposed opposite to each other, and the roller 200 is located between the two adjustment cylinders 300. For the convenience of description, the direction in which the two adjustment cylinders 300 are spaced apart is determined as the first direction. Figure 1The left - right direction shown is, in the actual application scenario of the tape conveying device 10, the first direction is usually the horizontal direction.

[0035] The tape passing through the tape conveying device 10 can pass around the roller 200 and drive the roller 200 to rotate. Specifically, the roller 200 can rotate around the first rotation axis. Specifically, in this embodiment, the roller 200 includes a roller body 210 and a roller shaft 220. The roller shaft 220 is coaxially arranged with the first rotation axis, and the roller body 210 is rotatably sleeved on the roller shaft 220. The roller body 210 and the roller shaft 220 can be connected by bearings so that the roller body 210 can rotate around the roller shaft 220.

[0036] Since the roller shaft 220 does not need to rotate, it can be directly connected to the rotary joint 400 to simplify the connection structure, and the tape passing around the roller 200 can drive the roller body 210 to rotate around the roller shaft 220. It should be noted that, in other embodiments, the roller body 210 and the roller shaft 220 can also be fixedly connected, and the roller shaft 220 can be indirectly connected to the rotary joint 400 through a rotating element, such as a bearing, so that the entire roller 200 can rotate around the first rotation axis.

[0037] It should be noted that when the tape conveying device 10 is in the initial state, the first rotation axis of its roller 200 extends substantially along the first direction. The above - mentioned initial state refers to the state when the tape conveying device 10 is not started and the tape has not passed around the roller 200.

[0038] The rotary joint 400 allows both ends of the roller 200 to rotate relative to the piston rod 320, so that the first rotation axis of the roller 200 swings within a swing plane. In the initial state, the first rotation axis of the roller 200 is parallel to the above - mentioned first direction. However, during the operation of the tape conveying device 10, the roller 200 will be affected by the tape, so as to float relative to the initial state. That is to say, the roller 200 is not fixed relative to the mounting frame 100, but can float within one degree of freedom. Moreover, when the roller 200 deviates from the initial state, the roller 200 also has a tendency to return to the initial state under the action of the adjustment cylinder 300.

[0039] Please refer to Figure 2 and Figure 3 , in one embodiment, the rotary joint 400 includes a first rotating shaft 410 and a second rotating shaft 420. The first rotating shaft 410 is connected to one end of the roller 200, the second rotating shaft 420 is connected to the piston rod 320, and the cylinder block 310 is fixed to the mounting frame 100.

[0040] In terms of this embodiment, the roller shaft 220 is rotatably connected to the rotary joint 400 through the first rotating shaft 410, and the piston rod 320 is rotatably connected to the rotary joint 400 through the second rotating shaft 420. The passing roller 200 and the piston rod 320 can rotate around the first rotating shaft 410 and the second rotating shaft 420 respectively at the same time, and cooperate with the telescopic movement of the piston rod 320, so that the passing roller 200 can achieve swinging. Moreover, during the swinging process of the passing roller 200, the piston rod 320 does not deflect with the passing roller 200, and the adjusting cylinder 300 can always maintain a stable position.

[0041] The first rotating shaft 410 and the second rotating shaft 420 extend in a direction substantially perpendicular to the first rotation axis. Therefore, the first rotating shaft 410 and the second rotating shaft 420 can preferably limit the swinging direction of the passing roller 200, making the above-mentioned swinging plane perpendicular to the first rotating shaft 410 and the second rotating shaft 420. That is, the first rotation axis is always maintained in a plane, thereby improving the stability during the swinging process of the passing roller 200.

[0042] Furthermore, in this embodiment, the rotary joint 400 further includes a connecting body 430. The first rotating shaft 410 and the second rotating shaft 420 are installed on the connecting body 430. One end of the passing roller 200 is rotatably installed on the connecting body 430 through the first rotating shaft 410, and the piston rod 320 is rotatably installed on the connecting body 430 through the second rotating shaft 420.

[0043] Specifically, the connecting body 430 can adopt two spaced-apart cover plates (not labeled in the figure), and both the first rotating shaft 410 and the second rotating shaft 420 are fixed between the two cover plates. The connecting body 430 can facilitate the installation of the first rotating shaft 410 and the second rotating shaft 420. The piston rod 320 and the roller shaft 220 can extend between the two cover plates and be respectively connected to the second rotating shaft 420 and the first rotating shaft 410, so that the degrees of freedom of the piston rod 320 and the roller shaft 220 can be further restricted.

[0044] It should be noted that in other embodiments, the rotary joint 330 can also adopt other structures, such as a universal joint, a spherical pair, etc.

[0045] In addition, please refer to Figure 4 , in another embodiment, the rotary joint 400 includes a third rotating shaft (not shown in the figure). The piston rod 320 is connected to one end of the passing roller 200 through the third rotating shaft. The tape conveying device 10 further includes a rotating connecting member 500. The rotating connecting member 500 includes a fourth rotating shaft (not shown in the figure). The cylinder block 310 is rotatably installed on the mounting frame 100 through the fourth rotating shaft.

[0046] The roller 200 can rotate around the third rotating shaft, and the cylinder block 310 can rotate relative to the mounting bracket 100 around the fourth rotating shaft and cooperate with the telescopic movement of the piston rod 320, so that the roller 200 can achieve swinging. The rotating connecting member 500 can adopt structures such as universal joints and spherical pairs, or can also be set as only a pin shaft. Different from the previous embodiment, the position of the adjusting cylinder 300 is not fixed, but will shift as the roller 200 swings. Moreover, the third rotating shaft and the fourth rotating shaft also extend in a direction substantially perpendicular to the first rotation axis, so the third rotating shaft and the fourth rotating shaft can better limit the swinging direction of the roller 200, making the above-mentioned swinging plane perpendicular to the third rotating shaft and the fourth rotating shaft.

[0047] Under different working conditions, the roller 200 can reach equilibrium under the action of the restoring force provided by the adjusting cylinder 300. Please refer to Figure 5 and the force conditions of the roller 200 under different working conditions are as follows:

[0048] As Figure 5 shown in (a) of S1 , when the roller 200 is in the initial state, the material belt does not pass around the roller 200, so the resultant force of the roller 200 in the direction perpendicular to the first rotation axis is equal to 0; and in the direction parallel to the first rotation axis, that is, on the axial direction of the roller 200, the restoring forces provided by the two adjusting cylinders 300 on the left and right are the same in magnitude and opposite in direction, that is, F S1 =F S2 , and its resultant force is also equal to 0. Moreover, the direction of the restoring force is consistent with the extending direction of the first rotation axis, so the components of F S1 and F S2 in the direction perpendicular to the first rotation axis are 0, so the roller 200 remains in equilibrium.

[0049] As Figure 5 shown in (b) of S1 , when the material belt passes around the roller 200, the roller 200 will tension the material belt, and the material belt will exert a force perpendicular to the first rotation axis on the roller 200, thereby driving the roller 200 to displace relative to the initial position. The directions of the restoring forces provided by the two adjusting cylinders 300 on the left and right form angles with the first rotation axis of the roller 200, which are θ and θ' respectively. At this time, if the tension of the material belt is evenly distributed in the width direction (i.e., the extending direction of the first rotation axis), the above-mentioned force is equal to the resultant force of the components of the restoring forces provided by the two adjusting cylinders 300 to the roller 200 in the direction perpendicular to the first rotation axis, that is, sinθ.F S1 +sinθ'.F S2 =F.

[0050] As Figure 5As shown in (c), when the tension of the material strip is unevenly distributed along the width direction, the force applied by the material strip to the roller 200 will be different in the longitudinal direction of the roller 200, that is, in the width direction of the material strip. At this time, the force balance of the roller 200 is broken, so that the roller 200 is forced to swing relative to the mounting frame 100 until it switches to Figure 5 In the state shown in (d), the force on the roller 200 reaches equilibrium again. When the force on the roller 200 reaches equilibrium again, it means that the force applied by the material strip to the roller 200 is consistent in the width direction of the material strip, so the tension distribution of the material strip will also become uniform along the width direction.

[0051] In the process of the continuous change of the tension of the material strip, the restoring force applied to the roller 200 can make the roller 200 realize dynamic adjustment, so as to keep in contact with all parts of the material strip in the width direction, and make the force of the roller 200 reach dynamic balance. In other words, the roller 200 can adaptively adjust the angle of the first rotation axis according to the change of the tension of the material strip, so that the tension distribution of the material strip in the width direction after passing through the roller 200 is always uniform, so that the material strip can be effectively prevented from wrinkling.

[0052] According to the above force analysis, when the tension of the material belt is 0, θ and θ' are both equal to 0°, and when the tension is greater than 0, the force on the roller 200 must be greater than 0, so θ and θ' must not be equal to 0°. In other words, as long as there is a force on the roller 200, it can swing, and the restoring force F S1 and F S2 Therefore, there is no requirement for the tension that the adjusting cylinder 300 can provide, so the preload force of the adjusting cylinder 300 can be adjusted to a smaller value, thereby improving the response speed of the swing of the roller 200.

[0053] In the related art, in order to solve the problem of uneven tension distribution in the width direction of the material strip, elastic preload members such as cylinders, compression springs, etc. are generally provided at both ends of the swing roller. The elastic preload member applies an elastic thrust to the swing roller in a direction substantially perpendicular to the axis of the swing roller, so that the swing roller can float up and down, thereby allowing the angle of the swing roller to be adaptively adjusted according to the tension change when the material strip tension fluctuates.

[0054] To avoid the elastic pre-tightening member from being over-compressed and losing its elasticity, it is usually necessary to select an elastic pre-tightening member with a larger elastic force, that is, a larger elastic modulus. However, the tension fluctuation of the strip is generally relatively small, so the tension fluctuation of the strip may not be sufficient to overcome the elastic force of the elastic pre-tightening member, resulting in the swing roller being unable to float in time, so it cannot play a role in real-time adjustment of the strip tension. In this application, by setting the adjustment cylinder 300 and optimizing the force-bearing situation of the idler roller 200, the pulling force provided by the adjustment cylinder 300 enables the idler roller 200 to float smoothly regardless of its magnitude, without considering the magnitude of the pre-tightening force of the adjustment cylinder 300, precisely to overcome the defects existing in the above-related technologies.

[0055] In addition, please refer to again Figure 1 , in this embodiment, the strip conveying device 10 further includes a support 600 and an adjustment mechanism 700. The adjustment mechanism 700 includes a rotating shaft 710 rotatably installed on the support 600, and the mounting bracket 100 is fixedly connected to the rotating shaft 710.

[0056] Specifically, the rotating shaft 710 can rotate around the second rotation axis. When the strip conveying device 10 is in the initial state, the second rotation axis is parallel to the first rotation axis. When the adjustment mechanism 700 drives the mounting bracket 100 to rotate through the rotating shaft 710, it can drive the idler roller 200 and the adjustment cylinder 300 as a whole to rotate around the second rotation axis, thereby changing the angle of the above-mentioned swing plane. In actual use, by precisely controlling the rotation angle of the rotating shaft 710, the above-mentioned swing plane can be adjusted to be parallel to the horizontal plane. In this way, the idler roller 200 will float in the horizontal plane during operation, so that the influence of the gravity factor of the components can be basically ignored.

[0057] Furthermore, in this embodiment, the adjustment mechanism 700 further includes a limit plate 720 and a limit pin 730. The limit plate 720 is provided at at least one end of the rotating shaft 710, and the limit plate 720 is provided with a plurality of circumferentially distributed positioning holes (not shown in the figure). The limit pin 730 is telescopically installed on the support 600 and points to the limit plate 720.

[0058] By operating the expansion and contraction of the limit pin 730, it can be inserted into or withdrawn from the corresponding positioning hole, thereby locking or unlocking the limit plate 720 to the support 600. Specifically, the rotating shaft 710 can be installed on the support 600 through a bearing, and the rotating shaft 710 can be manually operated to rotate around its own axis (the second rotation axis), thereby driving the mounting bracket 100 to rotate. As the rotating shaft 710 drives the limit plate 720 to rotate, the limit pin 730 can be operated to insert into any positioning hole to fix the limit plate 720 to the support 600. When the angle of the swing plane needs to be adjusted, first pull out the limit pin 730 from the current positioning hole, and then insert the limit pin 730 into the opposite positioning hole after the rotating shaft 710 rotates the required angle.

[0059] More specifically, the adjustment mechanism 700 generally further includes a potentiometer 740, which is mounted on the rotating shaft 710. The potentiometer 740 can record the deflection angle of the rotating shaft 710 relative to the initial position, thereby facilitating accurate control of the rotation angle of the rotating shaft 710.

[0060] When the tension of the material strip passing through the roller 200 is uneven, the above-mentioned material strip conveying device 10 and lithium battery production equipment will cause the force applied by the material strip to the roller 200 to be different in the longitudinal direction of the roller 200, that is, in the width direction of the material strip, and force the roller 200 to swing relative to the mounting frame 100 until the force on the roller 200 is balanced again, thereby balancing the tension in the width direction of the material strip. In the process of constantly changing tension, the restoring force applied by the adjustment cylinder 300 to the roller 200 can enable the roller 200 to achieve dynamic adjustment, thereby maintaining contact with various places in the width direction of the material strip, and achieving dynamic balance of the force on the roller 200. It can be seen that the roller 200 can adaptively adjust the angle according to the change of the tension of the material strip, so that the tension distribution of the material strip in the width direction after passing through the roller 200 is always maintained uniform, so that the material strip can be effectively prevented from wrinkling.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A belt conveyor device, characterized in that: It comprises a mounting frame, a roller, two adjusting cylinders and two rotating joints, wherein two ends of the roller are respectively connected with the two rotating joints, and the two adjusting cylinders are respectively connected with the two ends of the roller through the rotating joints.

2. The material belt conveying device according to claim 1, characterized in that: The rotary joint comprises a first rotating shaft and a second rotating shaft, wherein the first rotating shaft is connected to one end of the roller, and the second rotating shaft is connected to the piston rod of the adjusting cylinder, and the cylinder body of the adjusting cylinder is fixed to the mounting frame.

3. The material belt conveying device according to claim 2, characterized in that: The rotary joint also includes a connecting body, the first rotating shaft and the second rotating shaft are installed on the connecting body, one end of the roller is rotatably installed on the connecting body through the first rotating shaft, and the piston rod is rotatably installed on the connecting body through the second rotating shaft.

4. The material belt conveying device according to claim 1, characterized in that: The rotary joint includes a third rotating shaft, and the piston rod of the adjusting cylinder is connected to one end of the roller via the third rotating shaft. The material belt conveying device also includes a rotating connecting member, and the rotating connecting member includes a fourth rotating shaft. The cylinder body of the adjusting cylinder is rotatably mounted on the mounting frame via the fourth rotating shaft.

5. The material belt conveying device according to claim 1, characterized in that: The roller comprises a roller body and a roller shaft. The roller body is rotatably sleeved on the roller shaft, and the roller shaft is connected to the rotary joint.

6. The material belt conveying device according to any one of claims 1 to 5, characterized in that: It also includes a support and an adjusting mechanism, wherein the adjusting mechanism includes a rotating shaft rotatably mounted on the support, and the mounting frame is fixedly connected to the rotating shaft.

7. The material belt conveying device according to claim 6, characterized in that: The adjustment mechanism also includes a limit plate and a limit pin. The limit plate is arranged at at least one end of the rotating shaft, and the limit plate is provided with a plurality of positioning holes distributed along the circumference. The limit pin is telescopically installed on the support and points to the limit plate.

8. A material belt conveying device, characterized in that: It includes a mounting frame, a roller, two adjustment cylinders and two rotating joints. The roller can rotate around a first rotation axis. Each of the adjustment cylinders includes a cylinder body and a piston rod. The cylinder body is installed on the mounting frame. The two ends of the roller are respectively connected to the two piston rods through the rotating joints. The adjustment cylinder provides pulling force for the roller. The rotating joints allow the two ends of the roller to rotate relative to the piston rod so that the first rotation axis can swing in a swinging plane.

9. The material belt conveying device according to claim 8, characterized in that: The rotary joint comprises a first rotating shaft and a second rotating shaft, the first rotating shaft is connected to one end of the roller, the second rotating shaft is connected to the piston rod, the first rotating shaft and the second rotating shaft are both perpendicular to the first rotating axis, and the cylinder body is fixed to the mounting frame; or The rotating joint includes a third rotating shaft, which is connected to one end of the roller. The material belt conveying device also includes a rotating connecting member, which includes a fourth rotating shaft. The third rotating shaft and the fourth rotating shaft are both perpendicular to the first rotation axis. The cylinder body is rotatably mounted on the mounting frame via the fourth rotating shaft.

10. A battery cell production device, characterized in that: It comprises a material belt conveying device as described in any one of claims 1 to 9 above.

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