Tensioning assembly, unwinding device and battery production equipment

Abstract

The utility model discloses a tensioning assembly, an unwinding device and battery production equipment, and relates to the technical field of battery production, and the tensioning assembly comprises a rotary driver, a tensioning roller and a fixed roller; the axis of the fixed roller is parallel to the axis of the tensioning roller, and the roller surface of the fixed roller is aligned with the roller surface of the tensioning roller along a belt taking track of a preset material belt; the rotary driver is connected with the tensioning roller and used for driving the tensioning roller to swing in an arc mode so that the distance between the tensioning roller and the fixed roller can be changed. The tensioning roller swinging in an arc mode is matched with the fixed roller, the position of the tensioning roller relative to the fixed roller on the swinging track can be changed, and then the tensioning amplitude of a conveyed material belt is controlled. By means of the swing type tensioning control design, the problems that in linear tensioning control, the jamming phenomenon is prone to occurring in the high-speed unwinding process, and the tensioning adjustment precision is poor are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, in particular to a tensioning assembly, a unwinding device and a battery production equipment. BACKGROUND

[0002] In the production process of lithium batteries, the pole piece or the diaphragm usually exists in the form of a roll, that is, a material roll. When these material rolls are wound and unwound on the production line, the material belt needs to be accurately shaped to ensure that it can run stably along the predetermined track during unwinding and avoid deviation. In order to achieve this goal, a series of operations need to be performed on the material belt during unwinding, including but not limited to deviation correction, tensioning and buffering.

[0003] In the existing technology, the material belt tensioning mechanism usually adopts a straight line driving track, for example, a sliding rail and a sliding block are used to realize the tensioning of the material belt. However, this structure is prone to jamming at high speed, which affects the smooth running of the material belt and the production efficiency. In addition, the control precision is poor during tensioning adjustment, and the adjustment range is either large or small, which cannot accurately adapt to material belts of different thicknesses and materials, thereby affecting the flatness of the material belt and the production quality. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the present application is to provide a tensioning assembly, a unwinding device and a battery production equipment to solve the technical problems existing in the existing straight line tensioning control mode.

[0005] To achieve the above technical purpose, the present application provides a tensioning assembly, which comprises a rotary driver, a tensioning roller and a fixed roller.

[0006] The axis of the fixed roller is parallel to the axis of the tensioning roller, and the roller surface of the fixed roller is aligned with the roller surface of the tensioning roller along the preset material belt running track.

[0007] The rotary driver is connected with the tensioning roller, and is used to drive the tensioning roller to swing in a circular arc, so that the distance between the tensioning roller and the fixed roller is variable.

[0008] Further, the outer periphery of the tensioning roller is provided with a first anti-skid structure.

[0009] Further, the first anti-skid structure is an anti-skid layer wrapped around the outer periphery of the tensioning roller.

[0010] Further, the outer periphery of the fixed roller is provided with a second anti-skid structure.

[0011] The anti-skid surface of the second anti-skid structure is aligned with the anti-skid surface of the first anti-skid structure along the preset material belt running track.

[0012] Further, the second anti-skid structure is an anti-skid layer, which is wrapped on the outer circumferential surface of the fixing roller.

[0013] Further, the rotating driver is provided with an output shaft;

[0014] One end of the output shaft away from the rotating driver is fixedly connected with a connecting plate;

[0015] The tension roller is fixed on the connecting plate.

[0016] Further, the connecting plate is vertically connected with a connecting shaft;

[0017] Further, the connecting plate is vertically connected with a connecting shaft;

[0018] The connecting frame is mounted on the rotating driver and is provided with a connecting cavity for the output shaft to extend into;

[0019] One end of the connecting frame away from the rotating driver is provided with a bearing member;

[0020] The central hole of the bearing member is communicated with the connecting cavity;

[0021] One end of the connecting shaft away from the connecting plate extends into the connecting cavity through the central hole of the bearing member and is connected with the output shaft through a shaft coupling.

[0022] Further, the swinging track of the fixing roller and the tension roller partially coincide;

[0023] The tension roller is two;

[0024] The two tension rollers are symmetrically arranged relative to the output shaft;

[0025] The fixing roller is two and is staggered distributed around the output shaft and the two tension rollers.

[0026] The application further discloses a pay-off device, which comprises a device body and the tension assembly.

[0027] The tension assembly is arranged on the material belt pay-off conveying path of the device body and is used for tensioning and adjusting the conveyed material belt.

[0028] The application further discloses a battery production equipment, which comprises the pay-off device.

[0029] From the above technical solutions, the tension assembly designed by the application has the following beneficial effects:

[0030] The tensioning roller swings in an arc to cooperate with the fixed roller, so that the position of the tensioning roller on the swing track is variable relative to the fixed roller (variable distance between the tensioning roller and the fixed roller), and then the tensioning range of the conveyed material belt is controlled. This swing type tensioning control design effectively solves the problems of easy jamming at high speed unwinding and poor tensioning adjustment accuracy existing in linear type tensioning control. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 It is a perspective view of a tensioning assembly provided in the present application;

[0033] Figure 2 It is a working state schematic view of a tensioning assembly provided in the present application;

[0034] Figure 3 It is a perspective view of a tensioning assembly without a fixed roller provided in the present application;

[0035] Figure 4 It is a perspective view of a fixed roller of a tensioning assembly provided in the present application;

[0036] Figure 5 It is a structural schematic view of a unwinding device provided in the present application;

[0037] In the figure: 1, rotary driver; 11, output shaft; 2, tensioning roller; 21, first anti-skid structure; 3, fixed roller; 31, second anti-skid structure; 4, connecting plate; 41, connecting shaft; 5, connecting frame; 51, connecting cavity; 52, bearing piece; 6, shaft coupling; 100, material belt; 200, device body; 300, tensioning assembly. DETAILED DESCRIPTION

[0038] The technical solutions of the embodiments of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0039] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0041] This application discloses a tensioning component, an unwinding device, and battery production equipment.

[0042] Please see Figure 1 as well as Figure 2 An embodiment of a tensioning component, an unwinding device, and a battery production equipment provided in this application includes:

[0043] Rotary drive 1, tension roller 2, and fixed roller 3.

[0044] The axis of the fixed roller 3 is parallel to the axis of the tension roller 2, and the roller surface of the fixed roller 3 is aligned with the roller surface of the tension roller 2 along the preset material belt conveyor track. It can be understood that the roller surface of the fixed roller 3 and the roller surface of the tension roller 2 are on the preset material belt conveyor track, and their respective end faces are aligned to form parallel roller surfaces through which the feed belt passes, ensuring that the feed belt 100 is subjected to uniform and stable tension force when passing through the tensioning assembly, and avoiding deviation.

[0045] The rotary driver 1 is connected to the tension roller 2 and is used to drive the tension roller 2 to swing in an arc, so that the distance between the tension roller and the fixed roller is variable. The rotary driver 1 can be a servo motor that can rotate in both directions, and by precisely controlling its rotation direction and speed, flexible driving of the tension roller 2 can be achieved.

[0046] The fixed roller 3 is arranged circumferentially around the preset rotation center line and parallel to the tension roller 2, forming a material feeding area with a variable distance between it and the fixed roller 3.

[0047] The tensioning assembly designed in the application has the following beneficial effects:

[0048] 1. Dynamic stability is improved: reducing the phenomenon of card jam during high-speed unwinding

[0049] The axial displacement adjustment of the traditional linear tensioning control depends on the direct push-pull of the slide rail or the air cylinder, and in high-speed operation, the response lag is easy to occur due to mechanical clearance or inertia, resulting in card jam.

[0050] However, the application cooperates the tensioning roller 2 with the arc swing with the fixed roller 3, realizes the variable position of the tensioning roller 2 on the swing track relative to the fixed roller 3 (variable distance between the tensioning roller and the fixed roller), and further controls the tensioning amplitude of the conveyed material belt 100 (such as a pole piece, not limited). The swing type tensioning control design converts the tensioning force into torque control, utilizes the continuity of rotary drive, avoids the start-stop impact in linear motion, and improves the high-speed stability.

[0051] 2. Friction resistance optimization: reducing mechanical loss and jam risk

[0052] The tensioning control realized by the cooperation mode of the existing slide rail and the slide block has the problem of sudden change of the friction coefficient caused by dirt accumulation or insufficient lubrication of the slide block.

[0053] And the swing type tensioning control of the application can reduce the relative sliding of the contact surface, and further solve the problem of sudden change of the friction coefficient caused by dirt accumulation or insufficient lubrication, and improve the stability.

[0054] 3. Adjustment precision is improved: closed-loop control

[0055] The swing type tensioning control design can integrate an angle encoder or a torque sensor to form a closed-loop feedback, so that the tensioning adjustment precision control effect is better.

[0056] In general, the swing type tensioning control design of the application effectively solves the problems of the linear type tensioning control, such as the phenomenon of card jam during high-speed unwinding and poor tensioning adjustment precision.

[0057] The above is embodiment one of a tensioning assembly provided by the embodiment of the application, and the following is embodiment two of a tensioning assembly provided by the embodiment of the application, please refer to Figures 1 to 4 .

[0058] Based on the scheme of the above embodiment one:

[0059] Further, as shown in the figure, Figure 1 the outer circumferential surface of the tensioning roller 2 is provided with a first anti-skid structure 21.

[0060] The design of the first anti-slip structure 21 aims to increase the friction between the tensioning roller 2 and the material belt 100, preventing the material belt 100 from slipping during the tensioning process, and ensuring the stability and accuracy of the tensioning effect. Through the first anti-slip structure 21, even in high-speed operation state, the material belt 100 can be firmly tensioned, avoiding the phenomenon of relaxation or deviation, further improving the running efficiency of the equipment and the product quality.

[0061] Further, the first anti-slip structure 21 is an anti-slip layer wrapped around the outer surface of the tensioning roller 2. The anti-slip layer can be made of materials with high friction coefficient, such as rubber, polyurethane or other suitable materials, to ensure good friction contact with the material belt 100. In addition, the thickness and hardness of the anti-slip layer can be carefully designed to provide the required friction and wear resistance, while not causing excessive wear or damage to the material belt 100.

[0062] Of course, the first anti-slip structure 21 can also be an anti-slip pattern (anti-slip groove / protrusion, etc. without limitation) directly formed on the outer surface of the tensioning roller 2.

[0063] Further, as shown in Figure 1 and Figure 4 , the outer surface of the fixed roller 3 is also provided with a second anti-slip structure 31. The design purpose of the second anti-slip structure 31 is similar to that of the first anti-slip structure 21, aiming to increase the friction between the fixed roller 3 and the material belt 100, thereby cooperating with the tensioning roller 2 to jointly ensure the stability and accuracy of the material belt 100 during the tensioning process.

[0064] Taking the example of the first anti-slip structure 21 and the second anti-slip structure 31, their respective anti-slip surfaces also serve as the roller surface in contact with the material belt 100. Correspondingly, the anti-slip surface of the second anti-slip structure 31 is aligned with the anti-slip surface of the first anti-slip structure 21 along the preset material belt running track; that is, the anti-slip surface of the second anti-slip structure 31 and the anti-slip surface of the first anti-slip structure 21 are on the preset material belt running track, and their respective end surfaces are aligned to form parallel roller surfaces for the material belt to pass through.

[0065] Similarly, the second anti-slip structure 31 can also be an anti-slip layer wrapped around the outer surface of the fixed roller 3. The material, thickness and hardness of the anti-slip layer on the fixed roller 3 can also be carefully designed to provide the best friction performance and wear resistance.

[0066] Of course, the second anti-slip structure 31 can also be an anti-slip pattern (anti-slip groove / protrusion, etc. without limitation) directly formed on the outer surface of the fixed roller 3.

[0067] Further, as shown in Figure 3As shown, the rotary driver 1 is provided with an output shaft 11, and the preset rotation center line is the central axis of the output shaft 11. With the central axis of the output shaft 11 of the rotary driver 1 as the rotation center line, the tensioning roller 2 and the fixed roller 3 can be arranged around the output shaft 11, and the overall structure is more compact.

[0068] Further, as shown, Figure 2 and Figure 3 Further, as shown, the rotary driver 1 is provided with an output shaft 11, and the preset rotation center line is the central axis of the output shaft 11. With the central axis of the output shaft 11 of the rotary driver 1 as the rotation center line, the tensioning roller 2 and the fixed roller 3 can be arranged around the output shaft 11, and the overall structure is more compact.

[0069] The design of the connecting plate 4 enables the tensioning roller 2 to be stably connected to the rotary driver 1, ensuring that the rotary driver 1 can accurately drive the tensioning roller 2 to rotate.

[0070] The output shaft 11 and the connecting plate 4 can be detachably connected through fasteners such as bolts, to improve the convenience of assembly, disassembly and maintenance; specifically, the output shaft 11 can be connected to the central position of one side surface of the connecting plate 4.

[0071] Correspondingly, the tensioning roller 2 can also be detachably connected to the connecting plate 4 through fasteners such as bolts, to improve the convenience of assembly, disassembly and maintenance; specifically, the tensioning roller 2 can be connected to a position (e.g. an end position) on the other side surface of the connecting plate 4 at a certain distance from the output shaft 11.

[0072] Further, the connecting plate 4 is perpendicularly connected with a connecting shaft 41; further comprising a connecting frame 5; the connecting frame 5 is installed on the rotary driver 1 and is provided with a connecting cavity 51 for the output shaft 11 to extend into; the end of the connecting frame 5 away from the rotary driver 1 is provided with a bearing member 52; the central hole of the bearing member 52 is communicated with the connecting cavity 51; the end of the connecting shaft 41 away from the connecting plate 4 extends into the connecting cavity 51 through the central hole of the bearing member 52, and is connected with the output shaft 11 through a shaft coupling 6. The design of such a connecting structure realizes stable and flexible connection between the tensioning assembly and the rotary driver 1. The cooperation of the connecting shaft 41 and the connecting cavity 51 through the bearing member 52 ensures the smoothness and accuracy of rotation, while reducing friction and wear. The use of the shaft coupling 6 further enhances the reliability and stability of the connection, and can withstand a larger torque and load, ensuring the stability and durability of the tensioning assembly during high-speed operation.

[0073] Further, the swing trajectory of the fixed roller 3 partially coincides with that of the tensioning roller 2, which enables the fixed roller 3 to at least partially contact and abut the tensioning roller 2 in one swing direction of the tensioning roller 2, thereby limiting the swing range (angle) of the tensioning roller 2 in that swing direction.

[0074] In order to improve the limiting effect, two fixed rollers 3 can be designed to limit the swing of the tensioning roller 2 in two swing directions. Under this design, the rotation control of the tensioning roller 2 can be divided into three states: initial state, adjustment state (adjustment process from initial state to maximum tensioning state), and maximum tensioning state.

[0075] The tensioning roller 2 is two, and the two tensioning rollers 2 are symmetrically arranged relative to the output shaft 11. Specifically, the two tensioning rollers 2 are fixed on the two ends of the connecting plate 4.

[0076] Such a symmetrical design can balance the tensioning force on both sides, ensure that the material belt 100 is evenly stressed during conveying, and avoid skewing or twisting. At the same time, the coordinated action of the two tensioning rollers 2 can also improve the flexibility and precision of tensioning adjustment.

[0077] The fixed roller 3 is two, and is distributed alternately with the two tensioning rollers 2 around the output shaft 11. This staggered distribution design can further optimize the spatial layout of the tensioning assembly and improve the compactness and stability of the overall structure. At the same time, the cooperation of the two fixed rollers 3 and the two tensioning rollers 2 can form a more stable tensioning system to ensure the stability and accuracy of the material belt 100 during conveying (while the swing of the two tensioning rollers 2 can be limited respectively).

[0078] As shown in Figure 5 The application also discloses a pay-off device, which comprises a device body 200 and a tensioning assembly 300.

[0079] The tensioning assembly 300 is arranged on the material belt 100 pay-off conveying path of the device body 200 and is used for tensioning adjustment of the conveyed material belt 100.

[0080] The application also discloses a battery production equipment, which comprises the pay-off device.

[0081] The above describes in detail the tensioning assembly, pay-off device and battery production equipment provided by the application. For those skilled in the art, according to the idea of the embodiments of the application, the specific implementation and application range can be changed. In view of the above, the content of the specification should not be understood as a limitation of the application.

Claims

1. A tensioning assembly, characterized by, The tensioning assembly comprises a rotating driver (1), a tensioning roller (2) and a fixed roller (3); The axis of the fixed roller (3) is parallel to the axis of the tensioning roller (2), and the roller surface of the fixed roller (3) is aligned with the roller surface of the tensioning roller (2) along a preset material belt running track. The rotating driver (1) is connected with the tensioning roller (2) and used to drive the tensioning roller (2) to swing in an arc shape, so that the distance between the tensioning roller and the fixed roller is variable.

2. The tensioning assembly of claim 1, wherein, The outer circumferential surface of the tensioning roller (2) is provided with a first anti-skid structure (21).

3. The tensioning assembly of claim 2, wherein, The first anti-skid structure (21) is an anti-skid layer wrapped on the outer circumferential surface of the tensioning roller (2).

4. The tensioning assembly of claim 2, wherein, The outer circumferential surface of the fixed roller (3) is provided with a second anti-skid structure (31). The anti-skid surface of the second anti-skid structure (31) is aligned with the anti-skid surface of the first anti-skid structure (21) along a preset material belt running track.

5. The tensioning assembly of claim 4, wherein, The second anti-skid structure (31) is an anti-skid layer wrapped on the outer circumferential surface of the fixed roller (3).

6. The tensioning assembly of claim 1, wherein, The rotating driver (1) is provided with an output shaft (11); One end of the output shaft (11) away from the rotating driver (1) is fixedly connected with a connecting plate (4); The tensioning roller (2) is fixed on the connecting plate (4).

7. The tensioning assembly of claim 6, wherein, The connecting plate (4) is vertically connected with a connecting shaft (41); Further comprising a connecting frame (5); The connecting frame (5) is installed on the rotating driver (1) and is provided with a connecting cavity (51) for the output shaft (11) to extend into; One end of the connecting frame (5) away from the rotating driver (1) is provided with a bearing member (52); The central hole of the bearing member (52) is communicated with the connecting cavity (51); One end of the connecting shaft (41) away from the connecting plate (4) extends into the connecting cavity (51) through the central hole of the bearing member (52) and is connected with the output shaft (11) through a shaft coupling (6).

8. The tensioning assembly of claim 1, wherein, The swinging track of the fixed roller (3) partially coincides with that of the tensioning roller (2); The tensioning roller (2) is two in number; The two tensioning rollers (2) are symmetrically arranged relative to the output shaft (11); The fixed roller (3) is two in number and is staggered with the two tensioning rollers (2) around the output shaft (11).

9. A take-up device, characterized by The tensioning assembly (300) is arranged on the material belt (100) unwinding and conveying path of the device body (200) and used to tension and adjust the conveyed material belt (100). The unwinding device comprises the unwinding device according to claim 9.

10. A battery production apparatus characterized by comprising: The unwinding device comprises the unwinding device according to claim 9.

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