CN111232698A - A kind of unwinding device and lamination equipment - Google Patents

Abstract

The invention provides an unwinding device and lamination equipment, and relates to the technical field of lithium battery manufacturing. The unwinding device includes a frame, a driving assembly, an air expansion shaft and a first support structure. A support structure is arranged on the frame, the air expansion shaft is rotatably arranged on the first support structure, and protrudes out through the vertical plate, and the driving assembly is arranged on the first support structure and is connected with the air expansion shaft in a transmission manner, Used to drive the air shaft to rotate. During actual unwinding, the weight of the pole piece is transmitted to the first support structure by the air expansion shaft for support, and since the first support structure is arranged on the frame, it can bear most of the weight through the frame, avoiding the need for vertical support. The board is load-bearing. Compared with the prior art, the present invention avoids the load-bearing of the vertical plate through the load-bearing of the frame, greatly improves the bearing capacity, avoids the deformation of the vertical plate, and ensures the unwinding effect.

Description

A kind of unwinding device and lamination equipment

technical field

The invention relates to the technical field of lithium battery manufacturing, and in particular, to an unwinding device and lamination equipment.

Background technique

With the expansion of the layout of the new energy vehicle industry, the demand for power batteries is increasing, and the size of the batteries is also increasing. The diameter of the pole piece becomes larger, reaching 700mm or more, and the weight reaches 550Kg or more; the speed of unwinding is also increased, and the linear speed of the outer diameter reaches 0.6m/s or more. This requires that the total length of the inflatable shaft of the pole piece unwinding becomes longer and the outer diameter becomes larger, so as to have sufficient strength; in addition, the supporting structure of the inflatable shaft also requires sufficient strength.

In the prior art, a cantilever support structure is usually used, and a circular hole is opened on the large plate, and all the weight of the pole piece is borne by the large plate, which will cause the connecting structure of the inflatable shaft to be easily bent and deformed, and the weight of the pole piece will eventually be deformed. It is very easy to cause the deformation of the large plate when it is transmitted to the large plate. The number of rollers on the large vertical plate is dense, and the precision is high. The deformation of the large vertical plate causes the verticality of the roller and the large vertical plate to be out of tolerance, which affects the overall belt transport of the equipment. precision. Ultimately, it will affect the yield of the cell.

In view of this, it is particularly important to design and manufacture an unwinding device with strong bearing capacity and less deformation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an unwinding device, which has strong bearing capacity and is not easily deformed.

Another object of the present invention is to provide a lamination device, which has a strong unwinding bearing capacity and is not easily deformed during unwinding.

The present invention is realized by adopting the following technical solutions.

In one aspect, the present invention provides an unwinding device, comprising a frame, a drive assembly, an air expansion shaft and a first support structure, the frame is provided with a vertical plate, and the first support structure is provided on the frame The air expansion shaft is rotatably disposed on the first support structure and protrudes outward through the vertical plate, and the drive assembly is disposed on the first support structure and communicates with the air The expansion shaft transmission connection is used to drive the air expansion shaft to rotate.

Further, the first support 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, and the driving assembly is connected to the mounting plate. The unwinding bearing seat is connected, and the air expansion shaft is rotatably arranged on the unwinding bearing seat.

Further, 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 the same as that of the air guide. The axial directions of the expansion shafts are parallel, the rectangular welding frame is slidably arranged on the first linear guide rail, the driving assembly is connected with the rectangular welding frame, and the air expansion shaft is rotatably arranged on the rectangular welding frame. Welded on the frame.

Further, an escape through hole for the air expansion shaft to pass through is opened on the vertical plate, and the diameter of the escape through hole is larger than the diameter of the air expansion shaft, so that the air expansion shaft and the vertical shaft are connected. There are mounting gaps between the boards.

Further, the unwinding device further comprises a second support structure, the second support structure is arranged at one end of the air expansion shaft away from the first support structure and is rollingly connected with the lower side of the air expansion shaft, used to support the inflatable shaft.

Further, the second support structure includes a bottom frame, a traverse driving member and a jacking-up bearing mechanism, the bottom frame is arranged on the frame, and a traverse guide rail is arranged on the bottom frame, and the top The lift bearing mechanism is slidably arranged on the traverse guide rail to support the air expansion shaft, and the traverse drive member is arranged on the bottom frame and is drivingly connected with the lift bearing mechanism for driving all the The jack-up bearing mechanism reciprocates along the traverse guide rail.

Further, the lifting bearing mechanism includes a sliding base, a second linear guide rail and a bearing base, the sliding base is slidably arranged on the traverse guide rail, and the second linear guide rail is arranged on the sliding base, The bearing base body is slidably arranged on the second linear guide rail, and the extending direction of the second linear guide rail is parallel to the axial direction of the inflatable shaft.

Further, the bearing base body includes a bottom plate, a jack-up driving member and a top plate, the bottom plate is slidably arranged on the second linear guide rail, and the jack-up driving member is arranged on the bottom plate and protrudes upward, so The top plate is connected with the jacking driving member and can be raised or lowered under the driving of the jacking driving member, and a rolling support is provided on the top plate, and two rolling supports are provided on the rolling support for connecting with the Rolling bearing on the lower side of the air shaft.

Further, a positioning member is further provided on the bottom frame, and the positioning member is selectively connected with the lifting bearing mechanism for limiting the position of the lifting bearing mechanism.

In another aspect, the present invention provides a lamination equipment, including an unwinding device, the unwinding device includes a frame, a drive assembly, an air expansion shaft and a first support structure, the frame is provided with a vertical plate, so The first support structure is arranged on the frame, the inflatable shaft is rotatably arranged on the first support structure, and protrudes outward through the vertical plate, and the drive assembly is arranged on the first support structure. A support structure is connected to the air-expanding shaft and is used for driving the air-expanding shaft to rotate.

The present invention has the following beneficial effects:

In the unwinding device provided by the present invention, the first support structure is arranged on the frame, the air expansion shaft is rotatably arranged on the first support structure, and protrudes outward through the vertical plate, and the drive assembly is arranged on the first support structure. The first support structure is connected with the air expansion shaft in transmission. During actual unwinding, the weight of the pole piece is transmitted by the air expansion shaft to the first support structure for support, and since the first support structure is arranged on the frame, it can bear most of the weight through the frame, avoiding the need for vertical The board is load-bearing. Compared with the prior art, the present invention avoids the load-bearing of the vertical plate through the load-bearing of the frame, greatly improves the bearing capacity, avoids the deformation of the vertical plate, and ensures the unwinding effect.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of an unwinding device provided by a first embodiment of the present invention;

Fig. 2 is a schematic diagram of the connection structure of the first support structure and the inflatable shaft in Fig. 1;

3 is a schematic structural diagram of the second support structure in FIG. 1 from a first viewing angle;

4 is a schematic structural diagram of the second support structure in FIG. 1 from a second viewing angle;

FIG. 5 is a schematic structural diagram of the jack-up bearing mechanism in FIG. 4 .

Icon: 100-unwinding device; 110-frame; 111-vertical plate; 130-drive assembly; 131-motor bracket; 133-servo motor; 135-reducer; 137-synchronous belt; 150-air shaft; 170 -1st support structure; 171-installation plate; 173-unwinding bearing seat; 175-rectangular welding frame; 177-first linear guide; 190-second support structure; 191-chassis; 1911-traverse guide; 1913-bracket; 192-positioning piece; 193-traverse driving piece; 195-jacking bearing mechanism; 197-sliding base; 198-second linear guide rail; 199-bearing seat body; 1991-base plate; Pieces; 1995 - top plate; 1997 - rolling support; 1999 - rolling bearing.

Detailed ways

In order to make the purposes, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "vertical", "horizontal", "inner", "outer", etc. The orientation or positional relationship of the invention, or the orientation or positional relationship that is usually placed when the product of the invention is used, is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, It is constructed and operated in a particular orientation and is therefore not to be construed as a limitation of the present invention. Furthermore, the terms "first", "second", etc. are only used to differentiate the description and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "connected", "installed" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As disclosed in the background art, the conventional unwinding mechanism in the art realizes the support by directly installing the support structure on the vertical plate, but because the vertical plate is not strong enough and the vertical plate is a vertically installed plate-like structure, As a result, the bearing capacity of the support structure is poor, resulting in a small bearing capacity of the air-expanded shaft. At present, the bearing capacity is at most about 250kg, which is difficult to meet the increasing pole piece weight. The unwinding device provided by the present invention greatly improves its load-bearing capacity by changing the installation position of the support structure and improving its structure at the same time.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The features of the embodiments described below may be combined with each other without conflict.

first embodiment

Referring to FIG. 1 and FIG. 2 in combination, the present embodiment provides an unwinding device 100 with strong load-bearing capacity, which can prevent the vertical plate 111 from being deformed and affect the unwinding effect, and is convenient for feeding.

The unwinding device 100 provided in this embodiment includes a frame 110 , a drive assembly 130 , an air expansion shaft 150 , a first support structure 170 and a second support structure 190 . The frame 110 is provided with a vertical plate 111 , and the first support structure 170 Set on the frame 110, the inflatable shaft 150 is rotatably disposed on the first support structure 170 and protrudes outward through the vertical plate 111, and the drive assembly 130 is disposed on the first support structure 170 and is connected with the inflatable shaft. 150 drive connection, used to drive the air expansion shaft 150 to rotate. The second support structure 190 is disposed at one end of the inflatable shaft 150 away from the first support structure 170 and is rollingly connected to the lower side of the inflatable shaft 150 for supporting the inflatable shaft 150 .

In this embodiment, the first support structure 170 is disposed on the square pass of the frame 110 , which greatly improves the overall carrying 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 carry the weight of the pole piece and is not easily deformed, which improves the installation accuracy of the equipment over-roller.

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. The bearing capacity of the inflatable shaft 150 is further improved.

It should be noted that, in this embodiment, there are two air expansion shafts 150 to facilitate the unwinding operation. At the same time, there are also two first support structures 170 and two drive assemblies 130 , and the two first support structures 170 are arranged on the frame 110 at intervals. On the square pass, the two driving assemblies 130 respectively drive the two inflatable shafts 150 to rotate. At the same time, the second support structure 190 can support the two inflatable shafts 150 at the same time, and the specific support structure will be described in detail later.

The first support structure 170 includes a mounting plate 171 and an unwinding bearing seat 173. The mounting plate 171 is fixedly arranged on the frame 110, the unwinding bearing seat 173 is arranged on the mounting plate 171, and the driving assembly 130 is connected with the unwinding bearing seat 173. The air expansion shaft 150 is rotatably provided on the unwinding bearing seat 173 . Specifically, the mounting plate 171 is fixedly welded on the square pass of the frame 110 , the unwinding bearing seat 173 is welded on the mounting plate 171 , the air expansion shaft 150 is arranged on the unwinding bearing seat 173 , and the unwinding bearing seat 173 can carry the load The pole piece on the inflatable shaft 150.

The unwinding bearing seat 173 includes a rectangular welding frame 175 and a first linear guide rail 177 , the first linear guide rail 177 is arranged on the mounting plate 171 , and the extension direction of the first linear guide rail 177 is the same as the axial direction of the air expansion shaft 150 . In parallel, the rectangular welding frame 175 is slidably arranged on the first linear guide rail 177 , the driving assembly 130 is connected with the rectangular welding frame 175 , and the air expansion shaft 150 is rotatably arranged on the rectangular welding frame 175 .

In this embodiment, the rectangular welded frame 175 is used to support the air-expanding shaft 150 , which has higher strength and lowers manufacturing cost than the conventional flange-type bearing seat.

In this embodiment, the first linear guide rail 177 has an I-shaped structure, and the bottom of the rectangular welding frame 175 is provided with a ferrule structure that is fastened to the first linear guide rail 177 . The ferrule structure can make the rectangular welding The frame 175 is slidably arranged on the first linear guide rail 177 and limits the rectangular welding frame 175 in the vertical direction to prevent the rectangular welding frame 175 from falling off the first linear guide rail 177 . The first linear guide rail 177 is arranged along the axial direction of the air expansion shaft 150, that is, along the front and rear directions. The direction of movement is convenient to adjust the position of the air expansion shaft 150 when unwinding and correcting deviation.

In this embodiment, the vertical plate 111 is provided with an escape through hole through which the air expansion shaft 150 passes. installation clearance. By providing the avoidance through hole, and the 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 capacity on the air expansion shaft 150 from being transmitted to the vertical plate 111 As a result, the vertical plate 111 is deformed.

The drive assembly 130 includes a motor support 131 , a servo motor 133 , a reducer 135 and a timing belt 137 , the motor support 131 is connected to the unwinding bearing seat 173 , the servo motor 133 and the reducer 135 are both arranged on the motor support 131 , and the servo motor 133 The synchronous belt 137 is connected with the speed reducer 135 in a driving manner, and the synchronous belt 137 is connected with the speed reducer 135 and the air expansion shaft 150 respectively, so that the speed reducer 135 is connected with the air expansion shaft 150 in a driving connection.

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

Referring to FIG. 3 to FIG. 5 in combination, the second support structure 190 includes a bottom frame 191 , a traverse driving member 193 and a jack-up bearing mechanism 195 , the bottom frame 191 is provided on the frame 110 , and a traverse guide rail is provided on the bottom frame 191 In 1911, the jacking bearing mechanism 195 is slidably arranged on the traverse guide rail 1911 to support the air expansion shaft 150, and the traverse driving member 193 is arranged on the bottom frame 191 and is connected with the jacking bearing mechanism 195 in a driving manner to drive the jacking up. The carrying mechanism 195 reciprocates along the traverse guide rail 1911 .

In this embodiment, the bottom frame 191 is welded on the frame 110, and the traverse driving member 193 is a horizontal cylinder disposed on the bottom frame 191. 1911 is arranged in the horizontal direction, and the extending direction of the traverse guide rail 1911 is perpendicular to the axial direction of the inflatable shaft 150 , that is, the traverse driving member 193 can drive the lifting bearing mechanism 195 to move in the direction close to or away from the inflatable shaft 150 , which is convenient for feeding.

In this embodiment, the bottom frame 191 is further provided with a positioning member 192 , and the positioning member 192 is selectively connected with the lifting bearing mechanism 195 for limiting the position of 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 limit of the jack-up bearing mechanism 195 .

It should be noted that, in this embodiment, there are two lifting bearing mechanisms 195 , which are used to lift and support the two inflatable shafts 150 respectively. Specifically, the bottom frame 191 is further provided with a bracket 1913 , and another lifting bearing mechanism 195 is provided on the bracket 1913 to support the other inflatable shaft 150 .

The lifting bearing mechanism 195 includes a sliding base 197 , a second linear guide 198 and a bearing base 199 . The sliding base 197 is slidably arranged on the traverse guide rail 1911 , the second linear guide 198 is arranged on the sliding base 197 , and the bearing body 199 slides It is arranged on the second linear guide rail 198 , and the extending direction of the second linear guide rail 198 is parallel to the axial direction of the air expansion shaft 150 .

In this embodiment, the extending direction of the second linear guide 198 is parallel to the extending direction of the first linear guide 177, and both extend in the front-rear direction. During unwinding and rectification, the rectangular welding on the first linear guide 177 The frame 175 and the bearing body 199 on the second linear guide 198 run back and forth synchronously, so that the air expansion shaft 150 can move back and forth while maintaining the support, which facilitates deviation correction.

The carrier body 199 includes a bottom plate 1991, a jacking driver 1993 and a top plate 1995. The bottom plate 1991 is slidably arranged on the second linear guide rail 198. The jacking driver 1993 is arranged on the bottom plate 1991 and protrudes upward. The top plate 1995 is connected to the jacking driver. The top plate 1995 is provided with a rolling support 1997, and the rolling support 1997 is provided with two rolling bearings for rolling connection with the lower side of the inflatable shaft 150. 1999. The rolling support 1997 provided on the top plate 1995 can be driven to move up and down by providing the jacking driving member 1993, so that the rolling bearing 1999 on the rolling support 1997 is in rolling contact with the air expansion shaft 150 or out of contact with the air expansion shaft 150.

It should be noted that the jacking drive member 1993 is a jacking 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. Adjustment of the support height of the second support structure 190 is achieved.

In this embodiment, the rolling bearing 1999 is covered with a nylon sleeve, and the nylon sleeve will not slip off, which can further improve the bearing capacity.

It should be noted that when the upper pole piece is coiled, the lifting bearing mechanism 195 is driven by the traverse driving member 193 to slide along the traverse guide rail 1911, thereby avoiding the feeding trolley. After the feeding is completed, the air expansion shaft 150 is ventilated and expanded. , the lifting bearing mechanism 195 is returned to the lower part of the air expansion shaft 150 through the traverse 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 jack-up driving member 1993 is jacked up, so that the rolling bearing 1999 rolls in contact with the outer circle of the air-expanding shaft 150 to complete 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 speed reducer 135 , and then decelerates through the synchronous belt 137 , thereby driving the air expansion shaft 150 to rotate.

To sum up, in the unwinding device 100 provided in this embodiment, by placing the unwinding bearing seat 173 on the square pass of the frame 110, the overall bearing capacity is greatly improved, and at the same time, the air expansion shaft 150 and the vertical plate are avoided. The transmission of force between 111 prevents the vertical plate 111 from being deformed, and improves the installation accuracy of the equipment over the roller. At the same time, the lifting bearing mechanism 195 in the second support structure 190 can move laterally from side to side and can be positioned, which greatly facilitates the loading of the feeding trolley. material, and by setting the second support structure 190, the bearing capacity is supplemented, and the bearing capacity is further improved.

Second Embodiment

This 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 in the first embodiment. For a brief description, For parts not mentioned in this embodiment, reference may be made to the corresponding content in the first embodiment.

The unwinding device 100 includes a frame 110 , a drive assembly 130 , an air expansion shaft 150 and a first support structure 170 , the frame 110 is provided with a vertical plate 111 , the first support structure 170 is set on the frame 110 , and the air expansion shaft 150 It is rotatably arranged on the first support structure 170 and protrudes out through the vertical plate 111 . The drive assembly 130 is arranged on the first support structure 170 and is drive-connected with the air expansion shaft 150 for driving the air expansion shaft 150 turn.

The unwinding device 100 is used to load the pole piece coil material, the deviation rectification device and the lamination device are arranged on the vertical plate 111, wherein the deviation rectification device is used to rectify the deviation of the unwinding action, and the lamination device is used to stack the cut pole pieces. slice operation.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The unwinding device is characterized by comprising a rack, a driving assembly, an air expansion shaft and a first supporting structure, wherein a vertical plate is arranged on the rack, the first supporting structure is arranged on the rack, the air expansion shaft is rotatably arranged on the first supporting structure and penetrates through the vertical plate to extend outwards, and the driving assembly is arranged on the first supporting structure, is in transmission connection with the air expansion shaft and is used for driving the air expansion shaft to rotate.

2. The unwinding device of claim 1, wherein the first support structure comprises a mounting plate and an unwinding bearing seat, the mounting plate is fixedly disposed on the frame, the unwinding bearing seat is disposed on the mounting plate, the driving assembly is connected to the unwinding bearing seat, and the air shaft is rotatably disposed on the unwinding bearing seat.

3. The unwinding device of claim 2, wherein the unwinding bearing seat comprises a rectangular welding frame and a first linear guide rail, the first linear guide rail is disposed on the mounting plate, an extending direction of the first linear guide rail is parallel to an axial direction of the air-expansion shaft, the rectangular welding frame is slidably disposed on the first linear guide rail, the driving assembly is connected to the rectangular welding frame, and the air-expansion shaft is rotatably disposed on the rectangular welding frame.

4. The unwinding device as claimed in claim 1, wherein an avoiding through hole is formed in the vertical plate for the air-expansion shaft to pass through, and a diameter of the avoiding through hole is larger than a diameter of the air-expansion shaft, so that a mounting gap is formed between the air-expansion shaft and the vertical plate.

5. The unwinding device as claimed in claim 1, further comprising a second support structure disposed at an end of the inflatable shaft away from the first support structure and in rolling connection with a lower side of the inflatable shaft for supporting the inflatable shaft.

6. The unwinding device as claimed in claim 5, wherein the second supporting structure includes a bottom frame, a traverse driving member, and a jacking bearing mechanism, the bottom frame is disposed on the frame, and a traverse guide rail is disposed on the bottom frame, the jacking bearing mechanism is slidably disposed on the traverse guide rail for supporting the pneumatic shaft, and the traverse driving member is disposed on the bottom frame and is in transmission connection with the jacking bearing mechanism for driving the jacking bearing mechanism to reciprocate along the traverse guide rail.

7. The unwinding device as claimed in claim 6, wherein the jacking mechanism includes a sliding base, a second linear guide rail and a bearing seat, the sliding base is slidably disposed on the traverse guide rail, the second linear guide rail is disposed on the sliding base, the bearing seat is slidably disposed on the second linear guide rail, and an extending direction of the second linear guide rail is parallel to an axial direction of the inflatable shaft.

8. The unwinding device as claimed in claim 7, wherein the bearing seat includes a bottom plate, a jacking driving member and a top plate, the bottom plate is slidably disposed on the second linear guide rail, the jacking driving member is disposed on the bottom plate and extends upward, the top plate is connected to the jacking driving member and can be driven by the jacking driving member to ascend or descend, a rolling support is disposed on the top plate, and two rolling bearings for rolling connection with the lower side of the air expansion shaft are disposed on the rolling support.

9. The unwinding device as claimed in claim 6, wherein a positioning member is further disposed on the bottom frame, and the positioning member is selectively connected to the jacking mechanism for limiting the jacking mechanism.

10. A lamination device, characterized in that it comprises an unwinding device according to any one of claims 1-9.

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