Unwinding device and laminating equipment

Abstract

The present invention provides an unwinding device and a lamination device, which relate to the technical field of lithium battery manufacturing. The unwinding device includes a frame, a driving assembly, an air-expanding shaft and a first supporting structure. A vertical plate is provided on the frame, and the first supporting structure is provided on the frame. The air-expanding shaft is rotatably provided on the first supporting structure and extends outward through the vertical plate. The driving assembly is provided on the first supporting structure and is transmission-connected to the air-expanding shaft, so as to drive the air-expanding shaft to rotate. During actual unwinding, the weight of the pole piece is transferred to the first supporting structure by the air-expanding shaft for support, and since the first supporting structure is provided on the frame, most of the weight can be borne by the frame, and the load-bearing by the vertical plate is avoided. Compared with the prior art, the present invention bears the weight by the frame, and avoids the load-bearing by the vertical plate, so the load-bearing capacity is greatly improved, and the deformation of the vertical plate is avoided, thereby ensuring the unwinding effect.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery manufacturing, and in particular to an unwinding device and a lamination device. Background Art

[0002] With the expansion of the new energy vehicle industry, the demand for power batteries is increasing, and the size of batteries is also increasing. In addition, the speed of power battery stacking machines and laser die-cutting strips is getting higher and higher, resulting in the increase in the diameter of the pole piece roll, reaching 700mm or higher, and the weight reaching 550Kg or higher; the unwinding speed is also increasing, and the outer diameter line speed reaches 0.6m / s or higher. This requires the total length of the air-expanding shaft for unwinding the pole piece to be longer and the outer diameter to be larger in order to have sufficient strength; in addition, the support structure of the air-expanding shaft is also required to have sufficient strength.

[0003] In the prior art, a cantilever support structure is usually used, and a round hole is opened on the large plate. All the weight of the pole piece is borne by the large plate, which will cause the connection structure of the air shaft to be easily bent and deformed, and the weight of the pole piece is finally transferred to the large plate, which is very likely to cause deformation of the large plate. The number of rollers on the large vertical plate is dense, and the precision requirement is high. The deformation of the large vertical plate causes the verticality of the roller and the large vertical plate to exceed the tolerance, affecting the overall tape running accuracy of the equipment. Ultimately, it will affect the yield of the battery cell.

[0004] In view of this, it is particularly important to design and manufacture an unwinding device with strong load-bearing capacity and not prone to deformation. Summary of the invention

[0005] The object of the present invention is to provide an unwinding device which has a strong load-bearing capacity and is not prone to deformation.

[0006] Another object of the present invention is to provide a lamination device which has a strong unwinding load-bearing capacity and is not prone to deformation during unwinding.

[0007] The present invention is achieved by adopting the following technical solutions.

[0008] On the one hand, the present invention provides a rewinding device, including a frame, a driving assembly, an air-inflating shaft and a first supporting structure, the frame being provided with a vertical plate, the first supporting structure being provided on the frame, the air-inflating shaft being rotatably provided on the first supporting structure and extending outward through the vertical plate, the driving assembly being provided on the first supporting structure and being transmission-connected to the air-inflating shaft for driving the air-inflating shaft to rotate.

[0009] Furthermore, the first supporting structure includes a mounting plate and an unwinding bearing seat, the mounting plate is fixedly arranged on the frame, the unwinding bearing seat is arranged on the mounting plate, the driving assembly is connected to the unwinding bearing seat, and the air expansion shaft is rotatably arranged on the unwinding bearing seat.

[0010] Furthermore, the unwinding bearing seat includes a rectangular welded frame and a first linear guide rail, the first linear guide rail is arranged on the mounting plate, and the extension direction of the first linear guide rail is parallel to the axial direction of the gas expansion shaft, the rectangular welded frame is slidably arranged on the first linear guide rail, the driving assembly is connected to the rectangular welded frame, and the gas expansion shaft is rotatably arranged on the rectangular welded frame.

[0011] Furthermore, the vertical plate is provided with an avoidance through hole for the gas-expanding shaft to pass through, and the diameter of the avoidance through hole is larger than the diameter of the gas-expanding shaft, so that there is an installation gap between the gas-expanding shaft and the vertical plate.

[0012] Furthermore, the unwinding device also includes a second supporting structure, which is arranged at one end of the air-inflating shaft away from the first supporting structure and is rollingly connected to the lower side of the air-inflating shaft for supporting the air-inflating shaft.

[0013] Furthermore, the second supporting structure includes a base frame, a transverse driving member and a lifting bearing mechanism, the base frame is arranged on the frame, and a transverse guide rail is arranged on the base frame, the lifting bearing mechanism is slidably arranged on the transverse guide rail, and is used to support the air expansion shaft, the transverse driving member is arranged on the base frame and is transmission-connected to the lifting bearing mechanism, and is used to drive the lifting bearing mechanism to reciprocate along the transverse guide rail.

[0014] Furthermore, the lifting and supporting mechanism includes a sliding base, a second linear guide rail and a supporting seat body, the sliding base is slidably set on the transverse guide rail, the second linear guide rail is set on the sliding base, and the supporting seat body is slidably set on the second linear guide rail, and the extension direction of the second linear guide rail is parallel to the axial direction of the air expansion shaft.

[0015] Furthermore, the bearing seat body includes a base plate, a lifting drive member and a top plate, the base plate is slidably arranged on the second linear guide rail, the lifting drive member is arranged on the base plate and extends upward, the top plate is connected to the lifting drive member and can rise or descend under the drive of the lifting drive member, and a rolling bracket is arranged on the top plate, and two rolling bearings are arranged on the rolling bracket for rolling connection with the lower side of the air inflation shaft.

[0016] Furthermore, a positioning member is also provided on the base frame, and the positioning member is selectively connected to the lifting and supporting mechanism to limit the lifting and supporting mechanism.

[0017] On the other hand, the present invention provides a lamination device, including a unwinding device, the unwinding device including a frame, a driving assembly, an air-expanding shaft and a first supporting structure, the frame is provided with a vertical plate, the first supporting structure is provided on the frame, the air-expanding shaft is rotatably provided on the first supporting structure and extends outward through the vertical plate, the driving assembly is provided on the first supporting structure and is transmission-connected to the air-expanding shaft for driving the air-expanding shaft to rotate.

[0018] The present invention has the following beneficial effects:

[0019] The present invention provides an unwinding device, in which a first supporting structure is arranged on a frame, and a pneumatic shaft is rotatably arranged on the first supporting structure and extends outward through a vertical plate, and a driving assembly is arranged on the first supporting structure and is transmission-connected to the pneumatic shaft. During actual unwinding, the weight of the pole piece is transferred to the first supporting structure by the pneumatic shaft for support, and since the first supporting structure is arranged on the frame, most of the weight can be borne by the frame, and the vertical plate is avoided from bearing the weight. Compared with the prior art, the present invention bears the weight through the frame, avoiding the vertical plate from bearing the weight, and the load-bearing capacity is greatly improved, and the deformation of the vertical plate is avoided, thereby ensuring the unwinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic structural diagram of an unwinding device provided in a first embodiment of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the connection structure between the first supporting structure and the gas expansion shaft;

[0023] Figure 3 for Figure 1 A schematic structural diagram of the second supporting structure at a first viewing angle;

[0024] Figure 4 for Figure 1 A schematic structural diagram of the second supporting structure at a second viewing angle;

[0025] Figure 5 for Figure 4 Schematic diagram of the structure of the middle lifting bearing mechanism.

[0026] Icons: 100-unwinding device; 110-frame; 111-vertical plate; 130-drive assembly; 131-motor bracket; 133-servo motor; 135-reducer; 137-synchronous belt; 150-pneumatic shaft; 170-first supporting structure; 171-mounting plate; 173-unwinding bearing seat; 175-rectangular welded frame; 177-first linear guide; 190-second supporting structure; 191-base; 1911-transverse guide; 1913-bracket; 192-positioning member; 193-transverse drive member; 195-lifting bearing mechanism; 197-sliding base; 198-second linear guide; 199-bearing seat body; 1991-bottom plate; 1993-lifting drive member; 1995-top plate; 1997-rolling bracket; 1999-rolling bearing. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the inventive product is usually placed when in use, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] As disclosed in the background technology, conventional unwinding mechanisms in the art achieve support by directly installing the support structure on the vertical plate. However, due to the insufficient strength of the vertical plate and the fact that the vertical plate is a vertically installed plate-like structure, the bearing capacity of the support structure is poor, resulting in a small load-bearing capacity of the air-expanding shaft. Currently, the maximum load-bearing capacity is about 250kg, which is difficult to meet the increasing weight of the pole piece. The present invention provides an unwinding device, which greatly improves its load-bearing capacity by changing the installation position of the support structure and improving its structure.

[0033] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0034] First embodiment

[0035] See also Figure 1 and Figure 2 This embodiment provides an unwinding device 100 with a strong load-bearing capacity, which can prevent the vertical plate 111 from deforming and affecting the unwinding effect, and is convenient for loading.

[0036] The unwinding device 100 provided in this embodiment includes a frame 110, a driving assembly 130, an air-expanding shaft 150, a first supporting structure 170, and a second supporting structure 190. The frame 110 is provided with a vertical plate 111. The first supporting structure 170 is provided on the frame 110. The air-expanding shaft 150 is rotatably provided on the first supporting structure 170 and extends outward through the vertical plate 111. The driving assembly 130 is provided on the first supporting structure 170 and is in transmission connection with the air-expanding shaft 150, so as to drive the air-expanding shaft 150 to rotate. The second supporting structure 190 is provided at one end of the air-expanding shaft 150 away from the first supporting structure 170 and is in rolling connection with the lower side of the air-expanding shaft 150, so as to support the air-expanding shaft 150.

[0037] In this embodiment, the first support structure 170 is arranged on the square tube of the frame 110, which greatly improves the overall load-bearing capacity so as to bear the weight of the pole piece with a large winding diameter of the power battery. At the same time, the vertical plate 111 does not bear the weight of the pole piece and is not easy to deform, thereby improving the installation accuracy of the equipment roller.

[0038] In this embodiment, the first support structure 170 is arranged on the rear side of the vertical plate 111, and the second support structure 190 is arranged on the front side of the vertical plate 111. Through the joint support effect of the first support structure 170 and the second support structure 190, the bearing capacity of the air shaft 150 can be further improved.

[0039] It should be noted that in this embodiment, there are two gas expansion shafts 150 to facilitate the unwinding action, and at the same time, there are two first support structures 170 and drive components 130. The two first support structures 170 are arranged at intervals on the square passage of the frame 110, and the two drive components 130 respectively drive the two gas expansion shafts 150 to rotate. At the same time, the second support structure 190 can support the two gas expansion shafts 150 at the same time, and the specific support structure will be described in detail later.

[0040] The first support structure 170 includes a mounting plate 171 and an unwinding bearing seat 173. The mounting plate 171 is fixedly mounted on the frame 110, the unwinding bearing seat 173 is mounted on the mounting plate 171, the driving assembly 130 is connected to the unwinding bearing seat 173, and the gas expansion shaft 150 is rotatably mounted on the unwinding bearing seat 173. Specifically, the mounting plate 171 is fixedly welded on the square tube of the frame 110, the unwinding bearing seat 173 is welded on the mounting plate 171, the gas expansion shaft 150 is mounted on the unwinding bearing seat 173, and the unwinding bearing seat 173 can carry the pole piece on the gas expansion shaft 150.

[0041] The unwinding bearing seat 173 includes a rectangular welded frame 175 and a first linear guide 177. The first linear guide 177 is arranged on the mounting plate 171, and the extension direction of the first linear guide 177 is parallel to the axial direction of the gas expansion shaft 150. The rectangular welded frame 175 is slidably set on the first linear guide 177, the driving assembly 130 is connected to the rectangular welded frame 175, and the gas expansion shaft 150 is rotatably set on the rectangular welded frame 175.

[0042] In this embodiment, the gas expansion shaft 150 is supported by a rectangular welded frame 175 , which is stronger than a conventional flange-type bearing seat and saves manufacturing costs.

[0043] In this embodiment, the first linear guide 177 is an I-shaped structure, and a clamping structure that is buckled on the first linear guide 177 is provided at the bottom of the rectangular welding frame 175. The clamping structure enables the rectangular welding frame 175 to be slidably set on the first linear guide 177, and the rectangular welding frame 175 is limited in the vertical direction to prevent the rectangular welding frame 175 from falling off the first linear guide 177. The first linear guide 177 is arranged along the axial direction of the gas expansion shaft 150, that is, along the front-to-back direction. By providing the first linear guide 177, while carrying the rectangular welding frame 175, the gas expansion shaft 150 can be moved in the front-to-back direction, which is convenient for adjusting the position of the gas expansion shaft 150 during unwinding and correction.

[0044] In this embodiment, an avoidance through hole is provided on the vertical plate 111 for the air expansion shaft 150 to pass through, and the diameter of the avoidance through hole is larger than the diameter of the air expansion shaft 150, so that there is an installation gap between the air expansion shaft 150 and the vertical plate 111. By providing the avoidance through hole, and the hole diameter of the avoidance through hole is larger than the diameter of the air expansion shaft 150, the contact between the air expansion shaft 150 and the vertical plate 111 is avoided, thereby preventing the bearing force on the air expansion shaft 150 from being transmitted to the vertical plate 111 and causing the vertical plate 111 to deform.

[0045] The driving assembly 130 includes a motor bracket 131, a servo motor 133, a reducer 135 and a synchronous belt 137. The motor bracket 131 is connected to the unwinding bearing seat 173. The servo motor 133 and the reducer 135 are both arranged on the motor bracket 131, and the servo motor 133 is transmission-connected to the reducer 135. The synchronous belt 137 is respectively connected to the reducer 135 and the air expansion shaft 150, so that the reducer 135 is transmission-connected to the air expansion shaft 150.

[0046] In this embodiment, the motor bracket 131 is welded on the rectangular welding frame 175, and the synchronous belt 137 is respectively wound on the gas expansion shaft 150 and the output shaft of the reducer 135, so that the reducer 135 drives the gas expansion shaft 150 to rotate. Of course, a stepper motor can also be directly used here to drive the gas expansion shaft 150 to rotate.

[0047] See also Figures 3 to 5 The second supporting structure 190 includes a base frame 191, a transverse driving member 193 and a lifting bearing mechanism 195. The base frame 191 is arranged on the frame 110, and a transverse guide rail 1911 is arranged on the base frame 191. The lifting bearing mechanism 195 is slidably arranged on the transverse guide rail 1911 to support the air expansion shaft 150. The transverse driving member 193 is arranged on the base frame 191 and is transmission-connected with the lifting bearing mechanism 195 to drive the lifting bearing mechanism 195 to reciprocate along the transverse guide rail 1911.

[0048] In this embodiment, the base frame 191 is welded to the frame 110, and the transverse driving member 193 is a transverse cylinder arranged on the base frame 191. The cylinder drives the lifting support mechanism 195 to slide along the transverse guide rail 1911. The transverse guide rail 1911 is arranged in a horizontal direction, and the extension direction of the transverse guide rail 1911 is perpendicular to the axial direction of the gas expansion shaft 150. That is, the transverse driving member 193 can drive the lifting support mechanism 195 to move in a direction close to or away from the gas expansion shaft 150, so as to facilitate loading.

[0049] In this embodiment, a positioning member 192 is further provided on the base frame 191, and the positioning member 192 is selectively connected to the lifting bearing mechanism 195 to limit the lifting bearing mechanism 195. Specifically, the positioning member 192 is a positioning cylinder, which can be extended or retracted in the front-rear direction, so as to limit or release the lifting bearing mechanism 195.

[0050] It should be noted that in this embodiment, there are two lifting bearing mechanisms 195, which are respectively used to lift and support two gas expansion shafts 150. Specifically, a bracket 1913 is also provided on the base frame 191, and another lifting bearing mechanism 195 is provided on the bracket 1913 to support the other gas expansion shaft 150.

[0051] The lifting and supporting mechanism 195 includes a sliding base 197, a second linear guide rail 198 and a supporting seat body 199. The sliding base 197 is slidably set on the transverse guide rail 1911, the second linear guide rail 198 is set on the sliding base 197, and the supporting seat body 199 is slidably set on the second linear guide rail 198. The extension direction of the second linear guide rail 198 is parallel to the axial direction of the air expansion shaft 150.

[0052] In this embodiment, the extension direction of the second linear guide 198 is parallel to the extension direction of the first linear guide 177, and both extend in the front-to-back direction. During unwinding and deviation correction, the rectangular welded frame 175 on the first linear guide 177 and the bearing seat 199 on the second linear guide 198 run forward and backward synchronously, so that the air-expanding shaft 150 can move forward and backward while maintaining support, which is convenient for deviation correction.

[0053] The bearing seat body 199 includes a bottom plate 1991, a lifting driving member 1993 and a top plate 1995. The bottom plate 1991 is slidably arranged on the second linear guide rail 198. The lifting driving member 1993 is arranged on the bottom plate 1991 and extends upward. The top plate 1995 is connected to the lifting driving member 1993 and can rise or fall under the drive of the lifting driving member 1993. A rolling bracket 1997 is arranged on the top plate 1995. The rolling bracket 1997 is provided with two rolling bearings 1999 for rolling connection with the lower side of the gas expansion shaft 150. By providing the lifting driving member 1993, the rolling bracket 1997 arranged on the top plate 1995 can be driven to move up and down, so that the rolling bearings 1999 on the rolling bracket 1997 are in rolling contact with the gas expansion shaft 150 or are out of contact with the gas expansion shaft 150.

[0054] It should be noted that the lifting drive member 1993 is a lifting cylinder, the cylinder body of the cylinder is fixed on the bottom plate 1991, and the piston rod of the cylinder is connected to the top plate 1995, so as to drive the top plate 1995 to move up and down, so as to adjust the support height of the second support structure 190.

[0055] In this embodiment, a nylon sleeve is provided on the rolling bearing 1999, and the nylon sleeve will not slip off, which can further improve the load-bearing capacity.

[0056] It should be noted that when the upper pole piece is rolled, the lifting bearing mechanism 195 is driven by the transverse driving member 193 to slide along the transverse guide rail 1911, thereby avoiding the loading trolley. After the loading is completed, the air expansion shaft 150 is ventilated and expanded, and the lifting bearing mechanism 195 is returned to the bottom of the air expansion shaft 150 through the transverse driving member 193, and at the same time, the positioning member 192 extends to position the lifting bearing mechanism 195. After the positioning is completed, the lifting driving member 1993 is lifted upward, so that the rolling bearing 1999 rolls and contacts the outer circle of the air expansion shaft 150, completing the supporting action. After the supporting action is completed, the servo motor 133 at the first supporting structure 170 starts to work, decelerates through the reducer 135, and then decelerates through the synchronous belt 137, thereby driving the air expansion shaft 150 to rotate.

[0057] To sum up, the unwinding device 100 provided in this embodiment greatly improves the overall load-bearing capacity by placing the unwinding bearing seat 173 on the square tube of the frame 110, while avoiding the transmission of force between the air inflation shaft 150 and the vertical plate 111, preventing the vertical plate 111 from deforming, and improving the installation accuracy of the equipment over the roller. At the same time, the jacking bearing mechanism 195 in the second support structure 190 can move horizontally to the left and right and can be positioned, which greatly facilitates the loading of the loading trolley, and the load-bearing capacity is supplemented by setting the second support structure 190, thereby further improving the load-bearing capacity.

[0058] Second embodiment

[0059] The present embodiment provides a lamination device, including an unwinding device 100, a deviation correction device and a lamination device, wherein the basic structure and principle of the unwinding device 100 and the technical effects produced are the same as those of the first embodiment. For the sake of brief description, for parts not mentioned in this embodiment, reference may be made to the corresponding contents in the first embodiment.

[0060] The unwinding device 100 includes a frame 110, a driving assembly 130, an air-expanding shaft 150 and a first supporting structure 170. A vertical plate 111 is provided on the frame 110. The first supporting structure 170 is provided on the frame 110. The air-expanding shaft 150 is rotatably provided on the first supporting structure 170 and extends outward through the vertical plate 111. The driving assembly 130 is provided on the first supporting structure 170 and is transmission-connected to the air-expanding shaft 150, so as to drive the air-expanding shaft 150 to rotate.

[0061] The unwinding device 100 is used to load the pole piece coil, and the deviation correction device and the stacking device are arranged on the vertical plate 111, wherein the deviation correction device is used to correct the unwinding action, and the stacking device is used to stack the cut pole pieces.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reeling device, characterized in that: The invention comprises a frame, a driving assembly, an air-expanding shaft and a first supporting structure, wherein a vertical plate is arranged on the frame, the first supporting structure is arranged on the frame, the air-expanding shaft is rotatably arranged on the first supporting structure and extends outward through the vertical plate, the driving assembly is arranged on the first supporting structure and is transmission-connected with the air-expanding shaft, and is used to drive the air-expanding shaft to rotate; The unwinding device further comprises a second supporting structure, which is arranged at one end of the air-inflating shaft away from the first supporting structure and is rollingly connected to the lower side of the air-inflating shaft, for supporting the air-inflating shaft; Wherein, the first supporting structure is arranged on the square passage of the frame, and the first supporting structure is arranged on the rear side of the vertical plate, and the second supporting structure is arranged on the front side of the vertical plate; The first supporting structure includes a mounting plate and an unwinding bearing seat, the unwinding bearing seat includes a rectangular welding frame and a first linear guide rail, the first linear guide rail is arranged on the mounting plate, and the extension direction of the first linear guide rail is parallel to the axial direction of the gas expansion shaft, the rectangular welding frame is slidably arranged on the first linear guide rail, the driving assembly is connected to the rectangular welding frame, and the gas expansion shaft is rotatably arranged on the rectangular welding frame; The second supporting structure includes a base frame, a transverse driving member and a lifting bearing mechanism. The base frame is arranged on the frame, and a transverse guide rail is arranged on the base frame. The lifting bearing mechanism is slidably arranged on the transverse guide rail for supporting the gas expansion shaft. The transverse driving member is arranged on the base frame and is transmission-connected with the lifting bearing mechanism for driving the lifting bearing mechanism to reciprocate along the transverse guide rail. The lifting bearing mechanism includes a sliding base, a second linear guide rail and a bearing seat body. The sliding base is slidably arranged on the transverse guide rail, the second linear guide rail is arranged on the sliding base, and the bearing seat body is slidably arranged on the second linear guide rail. The extension direction of the second linear guide rail is parallel to the axial direction of the gas expansion shaft.

2. The unwinding device according to claim 1, characterized in that: The mounting plate is fixedly arranged on the frame, the unwinding bearing seat is arranged on the mounting plate, the driving assembly is connected to the unwinding bearing seat, and the air expansion shaft is rotatably arranged on the unwinding bearing seat.

3. The unwinding device according to claim 1, characterized in that: The vertical plate is provided with an avoidance through hole for the gas expansion shaft to pass through, and the diameter of the avoidance through hole is larger than the diameter of the gas expansion shaft, so that there is an installation gap between the gas expansion shaft and the vertical plate.

4. The unwinding device according to claim 1, characterized in that: The bearing seat body includes a base plate, a lifting drive member and a top plate, the base plate is slidably arranged on the second linear guide rail, the lifting drive member is arranged on the base plate and extends upward, the top plate is connected to the lifting drive member and can rise or fall under the drive of the lifting drive member, and a rolling bracket is arranged on the top plate, and two rolling bearings are arranged on the rolling bracket for rolling connection with the lower side of the air shaft.

5. The unwinding device according to claim 1, characterized in that: The base frame is also provided with a positioning member, which is selectively connected to the lifting and bearing mechanism and is used to limit the lifting and bearing mechanism.

6. A lamination device, characterized in that: It comprises an unwinding device as described in any one of claims 1 to 5.

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