A strip material conveying device

Abstract

This invention belongs to the technical field of conveying equipment and provides a strip material conveying device, including a frame, a conveying assembly for conveying strip materials mounted on the frame, and a constant force feeding assembly disposed at the feed end of the conveying assembly. The constant force feeding assembly includes: a rotating shaft mounted on the frame; a second drive mechanism mounted on the frame and connected to the rotating shaft; and a feeding wheel coaxially sleeved on the rotating shaft, with a preset torque between the feeding wheel and the rotating shaft. When the reverse torque on the feeding wheel is less than or equal to the preset torque, the rotating shaft can drive the feeding wheel to rotate; when the reverse torque on the feeding wheel is greater than the preset torque, slippage occurs between the feeding wheel and the rotating shaft, preventing the rotating shaft from driving the feeding wheel to rotate. The strip material conveying device provided by this invention, through the constant force feeding assembly, can achieve constant force conveying, thereby avoiding deformation, damage, or even breakage of the strip materials.

Description

Technical Field

[0001] This invention relates to the field of conveying equipment technology, and more specifically to a strip material conveying device. Background Technology

[0002] Strip-shaped materials, such as propellant strips, are characterized by their smooth surface, soft texture, certain viscosity and elasticity, and easy deformation under stress. Due to limitations in equipment and raw materials, when multiple strips are output from the previous process, the output speed and position of each strip vary irregularly. This manifests primarily as inconsistent output speeds for each strip at the same time, and inconsistent output speeds for the same material at different times. Consequently, during the conveying process, the varying lengths of the strips cause problems such as sticking, tangling, and elongation, making automated production difficult.

[0003] Currently, the above situation is mostly addressed through manual intervention. This involves observing adhesion and elongation during the production process and then manually intervening. This process is inefficient and consumes a lot of manpower and resources, resulting in high production costs. Furthermore, manual intervention can easily damage the strip materials. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a strip material conveying device to at least solve or alleviate one of the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides a strip material conveying device, including a frame, a conveying assembly for conveying strip materials disposed on the frame, and a constant force feeding assembly disposed at the feed end of the conveying assembly for transmitting the strip materials to the conveying assembly, the constant force feeding assembly comprising: A rotating shaft is mounted on the frame and rotatably connected to the frame. A second drive mechanism, mounted on the frame and connected to the rotating shaft, applies a driving force to the rotating shaft during operation to drive its rotation. The feed wheel is coaxially sleeved on the rotating shaft, and there is a preset torque between it and the rotating shaft; Specifically, when the reverse torque received by the feeding wheel is less than or equal to a preset torque, the rotating shaft can drive the feeding wheel to rotate; when the reverse torque received by the feeding wheel is greater than the preset torque, the feeding wheel slips between the rotating shaft and the rotating shaft, so that the rotating shaft cannot drive the feeding wheel to rotate.

[0006] Furthermore, the constant force feeding assembly also includes a second pressure wheel, which is disposed above the feeding wheel and is rotatably connected to the frame. The second pressure wheel applies pressure to the strip material to increase the friction between the strip material and the feeding wheel.

[0007] Furthermore, the constant force feeding assembly also includes a control mechanism, which is disposed on the rotating shaft. The control mechanism is used to adjust the preset torque between the feeding wheel and the rotating shaft.

[0008] Furthermore, the control mechanism includes: A friction element is fixedly mounted on the rotating shaft; An elastic element is provided, wherein the feeding wheel is movably connected to the rotating shaft, and both ends of the elastic element are respectively connected to the rotating shaft and the feeding wheel. The elastic element applies force to the feeding wheel, creating friction between the feeding wheel and the friction element, thereby creating the preset torque between the feeding wheel and the rotating shaft. An adjustment structure, which is mounted on the rotating shaft, is used to adjust the magnitude of the force applied by the elastic element to the feed wheel, thereby adjusting the magnitude of the preset torque.

[0009] Furthermore, the adjustment structure includes: An adjusting element, sleeved on and movably connected to the rotating shaft, is movable along the axis of the rotating shaft. By changing the position of the adjusting element, the deformation of the elastic element is changed, thereby changing the magnitude of the force exerted by the elastic element on the feed wheel; and A locking unit is disposed on the rotating shaft and / or the adjusting element, which is used to lock the adjusting element at a target position on the rotating shaft.

[0010] Furthermore, the feed end of the constant force feeding assembly is provided with a guide wheel, which is rotatably connected to the frame, and there is a buffer space between the guide wheel and the constant force feeding assembly. In the working state, when the material speed is greater than the conveying speed, the strip material can hang naturally in the buffer space to be temporarily stored in the buffer space.

[0011] Furthermore, it also includes a detection unit, which is used to detect the curvature of the strip material in the buffer space, thereby adjusting the conveying speed of the constant force feeding assembly and the conveying assembly according to the magnitude of the curvature.

[0012] Furthermore, when the curvature of the strip material in the buffer space is greater than a first preset value, the conveying speed of the conveying component and the constant force feeding component is increased; when the curvature of the strip material in the buffer space is less than a second preset value, the conveying speed of the conveying component and the constant force feeding component is reduced, so that the curvature of the strip material in the buffer space is kept within the target range, wherein the first preset value is greater than the second preset value.

[0013] Furthermore, each of the conveying component, the constant force feeding component, and the guide wheel is provided with n units, where n≥2, and the conveying component, the constant force feeding component, and the guide wheel correspond one-to-one.

[0014] Furthermore, it also includes a separation guide assembly, which includes m guide rods, where m = n-1, and n conveying spaces are separated by the m guide rods, with each of the n conveying spaces corresponding to one of the n conveying assemblies.

[0015] The beneficial effects of this invention are: The strip material conveying device provided by the present invention transmits the constant force of incoming material to the conveying component through the constant force feeding component, thereby avoiding deformation, tearing or even breakage of the strip material due to the tension generated by the incoming material speed being less than the conveying speed. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 A perspective view of a strip material conveying device provided in a first direction according to an embodiment of the present invention; Figure 2 for Figure 1 An enlarged view of part A shown; Figure 3 for Figure 1 An enlarged view of section B is shown below; Figure 4 for Figure 1 An enlarged view of section C is shown; Figure 5 A perspective view of a strip material conveying device provided in a second direction according to an embodiment of the present invention; Figure 6 for Figure 5 An enlarged view of section D is shown; Figure 7 for Figure 5 An enlarged view of section E shown.

[0018] Figure label: 100. Frame; 200. Conveying assembly; 210. Conveying belt; 220. First driven synchronous pulley; 230. First synchronous belt; 240. First pressure roller; 300. Constant force feeding assembly; 310. Rotating shaft; 320. Feeding roller; 330. Second pressure roller; 341. Second motor; 342. Second driving synchronous pulley; 343. Second driven synchronous pulley; 344. Second synchronous belt; 351. Friction element; 352. Elastic element; 353. Adjusting element; 410. Guide wheel; 420. Camera; 510. Guide rod; 511. Connecting shaft; 512. Bushing. Detailed Implementation

[0019] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0020] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] like Figure 1-7 As shown, the present invention provides a strip material conveying device, including a frame 100, on which a conveying assembly 200 is disposed, the conveying assembly 200 being used to convey strip materials.

[0026] like Figure 1 , 2 As shown in Figures 5 and 7, the conveying assembly 200 includes a drive pulley and a driven pulley that are sequentially spaced along the X-axis and rotatably connected to the frame 100, a conveying belt 210 that is sleeved on the drive pulley and the driven pulley and can rotate with the rotation of the drive pulley and the driven pulley, and a first drive mechanism that is mounted on the frame 100 and used to drive the drive pulley to rotate.

[0027] Specifically, the first drive mechanism includes a first motor fixedly mounted on the frame 100, which is connected to the drive pulley for transmission. In operation, the first motor drives the drive pulley to rotate, thereby driving the conveyor belt 210 to rotate, thus achieving the purpose of conveying the strip material.

[0028] Specifically, such as Figure 1 , 2As shown in Figures 5 and 7, a first driving synchronous pulley is mounted on the power output shaft of the first motor, and a first driven synchronous pulley 220 is mounted on the power input shaft of the driving pulley. A first synchronous belt 230 is mounted on the first driving synchronous pulley and the first driven synchronous pulley 220, and the first synchronous belt 230 can rotate with the rotation of the first driving synchronous pulley and / or the first driven synchronous pulley 220. In the working state, the first motor drives the first driving synchronous pulley to rotate, and drives the first driven synchronous pulley 220 to rotate through the first synchronous belt 230, thereby driving the driving pulley to rotate, and thus achieving the purpose of driving the conveyor belt 210 to rotate.

[0029] Preferably, such as Figure 2 , 7 As shown, the conveyor belt 210 is a grooved conveyor belt 210. In this embodiment, the conveyor belt 210 is a T-shaped conveyor belt. In operation, the grooves of the conveyor belt 210 can be used to limit the strip material, preventing it from deviating from the conveyor belt 210 during transport.

[0030] Preferably, such as Figure 1 , 2 As shown in Figures 5 and 7, a first pressure roller 240 is provided above the conveying surface of the conveyor belt 210, and the first pressure roller 240 is rotatably connected to the frame 100. In the working state, the first pressure roller 240 applies pressure to the strip material to press the strip material onto the conveyor belt 210, thereby increasing the friction between the strip material and the conveyor belt 210, thus preventing slippage between the strip material and the conveyor belt 210, and thereby improving the conveying efficiency.

[0031] Preferably, such as Figure 1 , 2 As shown in Figures 5 and 7, there are multiple first pressure rollers 240, which are arranged at intervals along the conveying direction of the conveyor belt 210.

[0032] Because the output speed of the strip material is not constant during the production process, the material feeding speed of the conveying component 200 is uneven. Therefore, when the conveying speed of the conveying component 200 is greater than the material feeding speed, the conveying component 200 will apply a pulling force to the strip material, which will cause the strip material to deform, or even break and damage the strip material.

[0033] To solve the above problems, such as Figure 1 , 3As shown in Figures 5 and 6, a constant force feeding assembly 300 is provided at the feed end of the conveying assembly 200. The constant force feeding assembly 300 is used to transfer materials to the conveying assembly 200. The constant force feeding assembly 300 includes a rotating shaft 310, which is mounted on the frame 100 and rotatably connected to the frame 100. A feeding wheel 320 is coaxially sleeved on the rotating shaft 310, and there is a preset torque between the feeding wheel 320 and the rotating shaft 310. When the reverse torque on the feed roller 320 is less than or equal to the preset torque, the rotating shaft 310 can drive the feed roller 320 to rotate, thereby conveying the strip material to the conveying assembly 200. When the reverse torque on the feed roller 320 is greater than the preset torque, the feed roller 320 slips with the rotating shaft 310, so that the rotating shaft 310 cannot drive the feed roller 320 to rotate, thereby preventing the conveying assembly 200 from conveying the strip material. This achieves the purpose of conveying the strip material to the conveying assembly 200 with constant force, thereby avoiding the strip material from being deformed, torn, or even broken due to the tension generated by the incoming material speed being less than the conveying speed.

[0034] like Figure 1 , 3 As shown in Figures 5 and 6, a second pressure roller 330 is disposed above the feed roller 320, and the second pressure roller 330 is rotatably connected to the frame 100. In the working state, the second pressure roller 330 applies pressure to the strip material to press the strip material onto the feed roller 320, thereby increasing the friction between the strip material and the feed roller 320, so that when the feed roller 320 rotates, it can convey the strip material to the conveying assembly 200.

[0035] like Figure 1 , 3 As shown in Figures 5 and 6, a second drive mechanism for driving the rotating shaft 310 to rotate is provided on the frame 100. The second drive mechanism is connected to the rotating shaft 310 in a transmission connection. Specifically, the second drive mechanism includes a second motor 341, which is fixedly mounted on the frame 100. The power output shaft of the second motor 341 is connected to the rotating shaft 310 in a transmission connection to drive the rotating shaft 310 to rotate. Specifically, a second driving synchronous pulley 342 is sleeved on the power output shaft of the second motor 341, and a second driven synchronous pulley 343 is sleeved on the rotating shaft 310. A second synchronous belt 344 is sleeved on the second driving synchronous pulley 342 and the second driven synchronous pulley 343, which can rotate with the rotation of the second driving synchronous pulley 342 and the second driven synchronous pulley 343. In use, the second motor 341 drives the second active synchronous pulley 342 to rotate, and the second active synchronous pulley 342 drives the second driven synchronous pulley 343 to rotate through the second synchronous belt 344. In turn, the driven synchronous pulley 343 drives the rotating shaft 310 to rotate, and the rotating shaft 310 drives the feed wheel 320 to rotate, thereby achieving the purpose of conveying strip materials to the conveying assembly 200.

[0036] In use, during the conveying process, when the torque applied to the feed wheel 320 by the strip material is greater than the preset torque between the feed wheel 320 and the rotating shaft 310, the rotating shaft 310 cannot drive the feed wheel 320 to rotate under the action of the torque applied to the feed wheel 320 by the strip material, so it cannot convey the strip material to the conveying assembly 200, and therefore will not apply tension to the strip material, so it will not break or damage the strip material.

[0037] Preferably, such as Figure 3 , 6 As shown, a control mechanism is provided on the rotating shaft 310. The control mechanism is used to adjust the preset torque between the feeding wheel 320 and the rotating shaft 310, so that the constant force feeding assembly 300 can adjust the preset torque between the feeding wheel 320 and the rotating shaft 310 according to different materials, thereby achieving the purpose of conveying various types of strip materials.

[0038] Specifically, such as Figure 3 , 6 As shown, the control mechanism includes a friction element 351, an elastic element 352, and an adjustment structure. The friction element 351 is fixedly mounted on the rotating shaft 310. The feed wheel 320 is movably connected to the rotating shaft 310. The two ends of the elastic element 352 are connected to the feed wheel 320 and the rotating shaft 310 respectively. The elastic element 352 applies force to the feed wheel 320 to generate friction between the feed wheel 320 and the friction element 351, thereby creating a preset torque between the feed wheel 320 and the rotating shaft 310. The elastic element 352 can be any component that can apply elastic force to the feed wheel 320. For example, a spring (e.g., a tension spring, a compression spring), a rubber band, a gas spring, etc. In this embodiment, the elastic element 352 is a compression spring.

[0039] The adjustment structure is set on the rotating shaft 310. The adjustment structure is used to adjust the magnitude of the force applied by the elastic element 352 to the feed wheel 320, so as to adjust the magnitude of the preset torque.

[0040] Specifically, such as Figure 3 , 6 As shown, the adjustment structure includes an adjustment element 353 and a locking unit. The adjustment element 353 is sleeved on and movably connected to the rotating shaft 310. The adjustment element 353 can move along the axis of the rotating shaft 310. The two ends of the elastic element 352 are connected to the feed wheel 320 and the adjustment element 353, respectively. In use, by changing the position of the adjustment element 353, the deformation of the elastic element 352 is changed, thereby changing the magnitude of the force applied by the elastic element 352 to the feed wheel 320, thus achieving the purpose of adjusting the preset torque.

[0041] A locking unit is disposed on the rotating shaft 310 and / or the adjusting element 353, and the locking unit is used to lock the adjusting element 353 at the target position on the rotating shaft 310. The two ends of the elastic element 352 are connected to the adjusting element 353 and the feed wheel 320, respectively.

[0042] Specifically, the locking unit includes a locking bolt, which is mounted on and threadedly connected to the adjusting element 353. The locking bolt can pass through the adjusting element 353 and abut against the rotating shaft 310. In use, rotating the locking bolt forward causes it to abut against the rotating shaft 310. Under the action of friction between the locking bolt and the rotating shaft 310, the adjusting element 353 is fixed in the target position. Rotating the locking bolt in the reverse direction causes it to separate from the rotating shaft 310, thus eliminating friction between them and releasing the locking of the adjusting element 353, thereby allowing the position of the adjusting element 353 to be changed.

[0043] Because the output speed of the strip material is not constant during the production process, the material feeding speed of the conveying component 200 is uneven. Therefore, when the conveying speed of the conveying component 200 is less than the material feeding speed, the strip material will accumulate at the feeding end of the conveying component 200 or the constant force feeding component 300, affecting the quality of the strip material.

[0044] To solve the above problems, such as Figure 1 , 3 As shown in Figures 5 and 6, the feed end of the constant force feeding assembly 300 is provided with a guide wheel 410. The guide wheel 410 is rotatably connected to the frame 100, and there is a buffer space between the guide wheel 410 and the constant force feeding assembly 300 (i.e., the feed wheel 320). When the incoming material speed is greater than the conveying speed, the strip material can hang down naturally in the buffer space to be temporarily stored in the buffer space, thereby avoiding the accumulation of strip material at the feed end of the conveying assembly 200 or the constant force feeding assembly 300.

[0045] Preferably, the guide wheel 410 is an encoder-controlled guide wheel 410 to calculate the conveying length of the strip material, thereby facilitating the adjustment of the conveying speed of the constant force feeding assembly 300 and the conveying assembly 200.

[0046] Preferably, such as Figure 1 , 3As shown in Figures 5 and 6, the feed end of the conveying assembly 200 is equipped with a detection unit, which is used to detect the curvature of the strip material within the buffer space. In use, the detection unit detects the curvature of the strip material within the buffer space, thereby adjusting the conveying speed of the constant force feeding assembly 300 and the conveying assembly 200 according to the magnitude of the curvature. Specifically, when the curvature of the strip material within the buffer space is greater than a first preset value, the conveying speed of the conveying assembly 200 and the constant force feeding assembly 300 is increased; when the curvature is less than a second preset value, the conveying speed of the conveying assembly 200 and the constant force feeding assembly 300 is decreased, so that the curvature of the strip material within the buffer space remains within the target range, wherein the first preset value is greater than the second preset value.

[0047] Specifically, the detection unit includes a camera 420, which is fixedly connected to the frame 100. The camera 420 is used to detect the curvature of the strip material within the buffer space. Specifically, the camera 420 acquires image information of the strip material under light illumination. Through image processing, edge contour extraction and fitting, the curvature of the strip material is obtained, thus determining its buffered drooping state. Based on the drooping state of the strip material, the conveying speed of the conveying component 200 and the constant force feeding component 300 is adjusted, thereby achieving buffer speed regulation. When the equipment is operating correctly, the curvature of the strip material within the buffer space is within the normal range. When the curvature is large, the conveying speed of the conveying component 200 and the constant force feeding component 300 is increased; when the curvature is small, the conveying speed of the conveying component 200 and the constant force feeding component 300 is decreased.

[0048] Preferably, such as Figure 1 and 5 As shown, n conveying components 200 are provided, where n ≥ 2, and the n conveying components 200 are arranged sequentially at intervals along the Y-axis. Correspondingly, n constant force feeding components 300, guide wheels 410, and cameras 420 are also provided, each corresponding one-to-one with the conveying components 200, to achieve the purpose of simultaneously manufacturing and conveying multiple strip materials, while also preventing the strip materials from tangling with each other. Specifically, in this embodiment, five conveying components 200, five constant force feeding components 300, five guide wheels 410, and five cameras 420 are provided.

[0049] Preferably, the feed end of the guide wheel 410 is provided with a separation guide assembly, which includes m guide rods 510, where m = n-1. The m guide rods 510 are arranged sequentially at intervals along the Y-axis to separate n conveying spaces. The n conveying components 200 correspond to the n conveying spaces respectively. The separation guide assembly separates and guides the strip material in the incoming direction, thereby further reducing the possibility of strip material entanglement.

[0050] The guide rod 510 includes a connecting shaft 511, which is fixedly connected to the frame 100. A bushing 512 is coaxially sleeved on the connecting shaft 511. The bushing 512 is rotatably connected to the connecting shaft 511 through a bearing, so that the bushing 512 rotates smoothly and is less likely to generate friction that would affect the transport of strip materials.

[0051] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A strip material conveying device, comprising a frame (100), wherein a conveying assembly (200) for conveying strip materials is disposed on the frame (100), characterized in that, It also includes a constant force feeding assembly (300) disposed at the feed end of the conveying assembly (200) and used to feed the strip material to the conveying assembly (200), the constant force feeding assembly (300) comprising: A rotating shaft (310) is mounted on the frame (100) and rotatably connected to the frame (100); A second drive mechanism, mounted on the frame (100), is connected to the rotating shaft (310) in a transmission manner. In operation, the second drive mechanism applies a driving force to the rotating shaft (310) to drive it to rotate; and The feed wheel (320) is coaxially sleeved on the rotating shaft (310), and there is a preset torque between it and the rotating shaft (310); When the reverse torque received by the feed wheel (320) is less than or equal to the preset torque, the rotating shaft (310) can drive the feed wheel (320) to rotate; when the reverse torque received by the feed wheel (320) is greater than the preset torque, the feed wheel (320) slips between the rotating shaft (310) and the rotating shaft (310), so that the rotating shaft (310) cannot drive the feed wheel (320) to rotate. The constant force feeding assembly (300) is provided with a guide wheel (410) at the feeding end. The guide wheel (410) is rotatably connected to the frame (100), and there is a buffer space between the guide wheel (410) and the constant force feeding assembly (300). In the working state, when the material speed is greater than the conveying speed, the strip material can hang down naturally in the buffer space to be temporarily stored in the buffer space. It also includes a detection unit, which is used to detect the curvature of the strip material in the buffer space, and thereby adjust the conveying speed of the constant force feeding assembly (300) and the conveying assembly (200) according to the magnitude of the curvature; When the curvature of the strip material in the buffer space is greater than a first preset value, the conveying speed of the conveying component (200) and the constant force feeding component (300) is increased. When the curvature of the strip material in the buffer space is less than a second preset value, the conveying speed of the conveying component (200) and the constant force feeding component (300) is decreased, so that the curvature of the strip material in the buffer space is kept within the target range, wherein the first preset value is greater than the second preset value.

2. The strip material conveying device according to claim 1, characterized in that, The constant force feeding assembly (300) also includes a second pressure wheel (330), which is located above the feeding wheel (320). The second pressure wheel (330) is rotatably connected to the frame (100). The second pressure wheel (330) applies pressure to the strip material to increase the friction between the strip material and the feeding wheel (320).

3. The strip material conveying device according to claim 1 or 2, characterized in that, The constant force feeding assembly (300) also includes a control mechanism, which is disposed on the rotating shaft (310). The control mechanism is used to adjust the preset torque between the feeding wheel (320) and the rotating shaft (310).

4. The strip material conveying device according to claim 3, characterized in that, The control mechanism includes: Friction element (351) is fixedly mounted on the rotating shaft (310); An elastic element (352) is provided, wherein the feed wheel (320) is movably connected to the rotating shaft (310), and both ends of the elastic element (352) are connected to the rotating shaft (310) and the feed wheel (320) respectively. The elastic element (352) applies force to the feed wheel (320) to create friction between the feed wheel (320) and the friction element (351), thereby creating the preset torque between the feed wheel (320) and the rotating shaft (310). An adjustment structure is provided on the rotating shaft (310) for adjusting the magnitude of the force applied by the elastic element (352) to the feed wheel (320), thereby adjusting the magnitude of the preset torque.

5. The strip material conveying device according to claim 4, characterized in that, The adjustment structure includes: An adjusting element (353), sleeved on and movably connected to the rotating shaft (310), is movable along the axis of the rotating shaft (310). By changing the position of the adjusting element (353), the deformation of the elastic element (352) is changed, thereby changing the magnitude of the force exerted by the elastic element (352) on the feed wheel (320); and A locking unit is provided on the rotating shaft (310) and / or the adjusting element (353) for locking the adjusting element (353) at a target position on the rotating shaft (310).

6. The strip material conveying device according to claim 1, 2 or 4, characterized in that, The conveying assembly (200), the constant force feeding assembly (300), and the guide wheel (410) are each provided with n units, where n≥2, and the conveying assembly (200), the constant force feeding assembly (300), and the guide wheel (410) correspond one-to-one.

7. The strip material conveying device according to claim 6, characterized in that, It also includes a separation guide assembly, which includes m guide rods (510), where m = n-1, and n conveying spaces are separated by the m guide rods (510), and the n conveying spaces correspond one-to-one with the n conveying assemblies (200).

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