CN211971146U - Unwinding device and lamination equipment - Google Patents

Abstract

The utility model provides an unwinding device and lamination equipment relates to the lithium cell and makes technical field, and this unwinding device includes frame, drive assembly, inflatable shaft and first bearing structure, is provided with the riser in the frame, and first bearing structure sets up in the frame, and inflatable shaft rotationally sets up on first bearing structure to pass the riser and outwards stretch out, drive assembly sets up on first bearing structure and is connected with inflatable shaft drive, is used for driving inflatable shaft and rotates. When unreeling in practice, the weight of pole piece is supported to first bearing structure by the transmission of inflatable axle, and because first bearing structure sets up in the frame, can bear most weight through the frame, and avoided carrying out the bearing through the riser. Compared with the prior art, the utility model discloses a riser bearing has been avoided in the frame bearing, and bearing capacity promotes greatly to avoided the riser to warp, guaranteed to unreel the effect.

Description

Unwinding device and lamination equipment

Technical Field

The utility model relates to a lithium cell makes technical field, particularly, relates to an unwinding device and lamination equipment.

Background

Along with the expansion of the industrial layout of new energy automobiles, the demand of power batteries is larger and larger, the size of the batteries is also larger and larger, and the speed of a power battery laminating machine and the speed of laser die cutting and slitting are higher and higher, so that the roll diameter of a pole piece is increased to 700mm or higher, and the weight of the pole piece is 550Kg or higher; the unreeling speed is also improved, and the outer diameter linear speed reaches 0.6m/s or higher. Therefore, the total length of the air expansion shaft for unwinding the pole piece is required to be longer, and the outer diameter of the air expansion shaft is required to be larger so as to have enough strength; in addition, the support structure of the inflatable shaft is required to have sufficient strength.

In the prior art, a cantilever supporting structure is usually adopted, a round hole is formed in a large plate, all the weight of a pole piece is borne by the large plate, so that the connecting structure of an air expansion shaft is easy to bend and deform, the weight of the pole piece is finally transferred to the large plate, the large plate is easy to deform, the number of rollers on the large vertical plate is dense, the precision requirement is high, the deformation of the large vertical plate causes the out-of-plumb degree of the rollers and the large vertical plate, and the overall tape running precision of equipment is affected. Ultimately, the yield of the cells is affected.

In view of this, it is very important to design and manufacture an unwinding device having a strong carrying capacity and being not easy to deform.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an unwinding device, its bearing capacity is strong, and is difficult for taking place to warp.

Another object of the utility model is to provide a lamination equipment, it unreels bearing capacity reinforce, is difficult for taking place to warp when unreeling.

The utility model is realized by adopting the following technical scheme.

In one aspect, the utility model provides an unwinding device, including frame, drive assembly, inflatable shaft and first bearing structure, be provided with the riser in the frame, first bearing structure sets up in the frame, inflatable shaft rotationally sets up on the first bearing structure, and passes the riser outwards stretches out, drive assembly sets up on the first bearing structure and with inflatable shaft drive connects, is used for driving inflatable shaft rotates.

Furthermore, the first supporting structure comprises a mounting plate and an unreeling bearing seat, the mounting plate is fixedly arranged on the rack, the unreeling bearing seat is arranged on the mounting plate, the driving assembly is connected with the unreeling bearing seat, and the inflatable shaft is rotatably arranged on the unreeling bearing seat.

Furthermore, the unreeling shaft bearing seat comprises a rectangular welding frame and a first linear guide rail, the first linear guide rail is arranged on the mounting plate, the extending direction of the first linear guide rail is parallel to the axis direction of the air expansion shaft, the rectangular welding frame is arranged on the first linear guide rail in a sliding mode, the driving assembly is connected with the rectangular welding frame, and the air expansion shaft is arranged on the rectangular welding frame in a rotating mode.

Furthermore, an avoiding through hole for the air expansion shaft to pass through is formed in the vertical plate, and the diameter of the avoiding through hole is larger than that of the air expansion shaft, so that an installation gap is formed between the air expansion shaft and the vertical plate.

Furthermore, the unwinding device further comprises a second supporting structure, wherein the second supporting structure is arranged at one end, far away from the first supporting structure, of the inflatable shaft and is in rolling connection with the lower side of the inflatable shaft, and the second supporting structure is used for supporting the inflatable shaft.

Furthermore, the second supporting structure comprises a bottom frame, a transverse moving driving piece and a jacking bearing mechanism, the bottom frame is arranged on the rack, a transverse moving guide rail is arranged on the bottom frame, the jacking bearing mechanism is arranged on the transverse moving guide rail in a sliding mode and used for supporting the air expansion shaft, and the transverse moving driving piece is arranged on the bottom frame, is in transmission connection with the jacking bearing mechanism and is used for driving the jacking bearing mechanism to move along the transverse moving guide rail in a reciprocating mode.

Furthermore, the jacking bearing mechanism comprises a sliding base, a second linear guide rail and a bearing seat body, the sliding base is arranged on the transverse moving guide rail in a sliding mode, the second linear guide rail is arranged on the sliding base, the bearing seat body is arranged on the second linear guide rail in a sliding mode, and the extending direction of the second linear guide rail is parallel to the axial direction of the air expansion shaft.

Furthermore, the bearing seat body comprises a bottom plate, a jacking driving piece and a top plate, the bottom plate is arranged on the second linear guide rail in a sliding mode, the jacking driving piece is arranged on the bottom plate and extends upwards, the top plate is connected with the jacking driving piece and can ascend or descend under the driving of the jacking driving piece, a rolling support is arranged on the top plate, and two rolling bearings which are used for being in rolling connection with the lower side of the air expansion shaft are arranged on the rolling support.

Further, still be provided with the setting element on the chassis, the setting element selectively with jacking bearing mechanism is connected, is used for right jacking bearing mechanism carries on spacingly.

In another aspect, the utility model provides a lamination equipment, including unwinding device, unwinding device includes frame, drive assembly, inflatable shaft and first bearing structure, be provided with the riser in the frame, first bearing structure sets up in the frame, inflatable shaft rotationally sets up on the first bearing structure, and passes the riser outwards stretches out, drive assembly sets up on the first bearing structure and with inflatable shaft transmission connects, is used for driving inflatable shaft rotates.

The utility model discloses following beneficial effect has:

the utility model provides a pair of unwinding device sets up first bearing structure in the frame, and the axle that rises by gas simultaneously rotationally sets up on first bearing structure to pass the riser and outwards stretch out, drive assembly sets up on first bearing structure and is connected with the transmission of the axle that rises by gas. When unreeling in practice, the weight of pole piece is supported to first bearing structure by the transmission of inflatable axle, and because first bearing structure sets up in the frame, can bear most weight through the frame, and avoided carrying out the bearing through the riser. Compared with the prior art, the utility model discloses a riser bearing has been avoided in the frame bearing, and bearing capacity promotes greatly to avoided the riser to warp, guaranteed to unreel the effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of an unwinding device according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a connection structure between the first support structure and the inflatable shaft in FIG. 1;

FIG. 3 is a schematic view of the second support structure of FIG. 1 from a first perspective;

FIG. 4 is a schematic view of the second support structure of FIG. 1 from a second perspective;

fig. 5 is a schematic structural diagram of the jacking bearing mechanism in fig. 4.

Icon: 100-an unwinding device; 110-a rack; 111-vertical plate; 130-a drive assembly; 131-a motor support; 133-a servo motor; 135-speed reducer; 137-synchronous belt; 150-inflatable shaft; 170-a first support structure; 171-a mounting plate; 173-unwinding the bearing seat; 175-rectangular welding frame; 177-a first linear guide; 190-a second support structure; 191-a chassis; 1911-traversing guide rail; 1913-a stent; 192-a locator; 193-a traverse drive; 195-a jacking bearing mechanism; 197-a sliding base; 198-a second linear guide; 199-a load-bearing seat; 1991-a base plate; 1993-jacking drive; 1995-top plate; 1997-rolling stand; 1999-rolling bearings.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented 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 in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As disclosed in the background art, the conventional unwinding mechanism in the art realizes support by directly mounting a support structure on a vertical plate, and because the vertical plate has insufficient strength and is a vertically mounted plate-shaped structure, the bearing capacity of the support structure is poor, the bearing capacity of an air expansion shaft is small, and at present, the bearing capacity reaches about 250kg at most, and the increasing pole piece weight is difficult to meet. The utility model provides a pair of unwinding device changes through the mounted position with bearing structure, improves its structure simultaneously for its bearing capacity improves greatly.

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

First embodiment

With reference to fig. 1 and fig. 2, the present embodiment provides an unwinding device 100, which has a strong bearing capacity, and can prevent the vertical plate 111 from deforming and affecting the unwinding effect, and meanwhile, the feeding is convenient.

The unwinding device 100 provided by this embodiment includes a frame 110, a driving assembly 130, an inflatable shaft 150, a first supporting structure 170 and a second supporting structure 190, a vertical plate 111 is provided on the frame 110, the first supporting structure 170 is provided on the frame 110, the inflatable shaft 150 is rotatably provided on the first supporting structure 170, and passes through the vertical plate 111 to extend outwards, and the driving assembly 130 is provided on the first supporting structure 170 and is in transmission connection with the inflatable shaft 150, so as to drive the inflatable shaft 150 to rotate. The second support structure 190 is disposed at an end of the inflatable shaft 150 away from the first support structure 170 and is connected to a lower side of the inflatable shaft 150 in a rolling manner, for supporting the inflatable shaft 150.

In this embodiment, the first supporting structure 170 is disposed on the square tube of the frame 110, so as to greatly improve the overall bearing capacity, so as to bear the weight of the pole piece with the large winding diameter of the power battery. Meanwhile, the vertical plate 111 does not bear the weight of the pole piece, so that deformation is not easy to occur, and the mounting precision of the roller of the equipment is improved.

In this embodiment, the first support structure 170 is disposed at the rear side of the vertical plate 111, and the second support structure 190 is disposed at the front side of the vertical plate 111, so that the bearing capacity of the inflatable shaft 150 can be further improved by the common support function of the first support structure 170 and the second support structure 190.

It should be noted that, the number of the air inflation shafts 150 is two in this embodiment, which facilitates the unwinding action, and meanwhile, the number of the first supporting structures 170 and the number of the driving assemblies 130 are also two, the two first supporting structures 170 are arranged on the square tube of the rack 110 at intervals, and the two driving assemblies 130 respectively drive the two air inflation shafts 150 to rotate. While the second support structure 190 is capable of supporting both inflatable shafts 150 simultaneously, the specific support structure will be described in detail later.

The first supporting structure 170 includes a mounting plate 171 and a unreeling shaft holder 173, the mounting plate 171 is fixedly disposed on the frame 110, the unreeling shaft holder 173 is disposed on the mounting plate 171, the driving assembly 130 is connected to the unreeling shaft holder 173, and the air-expanding shaft 150 is rotatably disposed on the unreeling shaft holder 173. Specifically, the mounting plate 171 is fixedly welded on the square tube of the frame 110, the unwinding shaft bearing 173 is welded on the mounting plate 171, the air-expanding shaft 150 is arranged on the unwinding shaft bearing 173, and the unwinding shaft bearing 173 can bear the pole piece on the air-expanding shaft 150.

The unwinding shaft bearing 173 comprises a rectangular welding frame 175 and a first linear guide 177, the first linear guide 177 is disposed on the mounting plate 171, the extending direction of the first linear guide 177 is parallel to the axial direction of the air-expansion shaft 150, the rectangular welding frame 175 is slidably disposed on the first linear guide 177, the driving assembly 130 is connected with the rectangular welding frame 175, and the air-expansion shaft 150 is rotatably disposed on the rectangular welding frame 175.

In this embodiment, the air shaft 150 is supported by the rectangular welding frame 175, which is stronger than a conventional flange-type bearing housing and saves manufacturing cost.

In this embodiment, first straight line guide rail 177 is the I shape structure, and the bottom of rectangle welding frame 175 is provided with the cutting ferrule structure of lock on first straight line guide rail 177, can make rectangle welding frame 175 slide to set up on first straight line guide rail 177 through this cutting ferrule structure to carry on spacingly to rectangle welding frame 175 in vertical direction, prevent that rectangle welding frame 175 from droing from first straight line guide rail 177. First linear guide 177 sets up along the axial direction of inflatable axle 150, sets up along the fore-and-aft direction promptly, through setting up first linear guide 177, when bearing rectangular welding frame 175, can make inflatable axle 150 can remove in the fore-and-aft direction, conveniently adjusts inflatable axle 150's position when unreeling and rectifying.

In this embodiment, the vertical plate 111 is provided with an avoiding through hole for the air expansion shaft 150 to pass through, and the diameter of the avoiding through hole is larger than that of the air expansion shaft 150, so that an installation gap is formed between the air expansion shaft 150 and the vertical plate 111. Through setting up dodging the through-hole, and dodging the aperture of through-hole and be greater than the diameter of inflatable shaft 150, avoided contact between inflatable shaft 150 and riser 111 to prevented that the bearing capacity on the inflatable shaft 150 from transmitting riser 111 and leading to riser 111 to warp.

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

In this embodiment, the motor bracket 131 is welded to the rectangular welding frame 175, and the timing belt 137 is respectively wound around the output shafts of the air expansion shaft 150 and the speed reducer 135, so that the speed reducer 135 drives the air expansion shaft 150 to rotate. Of course, a stepper motor could be used to rotate the air shaft 150.

With combined reference to fig. 3 to 5, the second supporting structure 190 includes a bottom frame 191, a traverse driving member 193, and a jacking bearing mechanism 195, the bottom frame 191 is disposed on the rack 110, a traverse guide 1911 is disposed on the bottom frame 191, the jacking bearing mechanism 195 is slidably disposed on the traverse guide 1911 for supporting the inflatable shaft 150, and the traverse driving member 193 is disposed on the bottom frame 191 and is in transmission connection with the jacking bearing mechanism 195 for driving the jacking bearing mechanism 195 to reciprocate along the traverse guide 1911.

In this embodiment, the chassis 191 is welded to the frame 110, the traverse driving element 193 is a transverse cylinder disposed on the chassis 191, the cylinder drives the jacking mechanism 195 to slide along the traverse guide 1911, the traverse guide 1911 is disposed along the horizontal direction, and the extension direction of the traverse guide 1911 is perpendicular to the axial direction of the inflatable shaft 150, that is, the traverse driving element 193 can drive the jacking mechanism 195 to move in a direction close to or far from the inflatable shaft 150, so as to facilitate loading.

In this embodiment, a positioning member 192 is further disposed on the bottom frame 191, and the positioning member 192 is selectively connected to the jacking bearing mechanism 195 for limiting the jacking bearing mechanism 195. Specifically, the positioning member 192 is a positioning cylinder that can be extended or retracted in the forward or backward direction to position or release the jacking mechanism 195.

It should be noted that in this embodiment, there are two jacking support mechanisms 195, which are respectively used for jacking and supporting the two air inflation shafts 150. Specifically, a support 1913 is further disposed on the base frame 191, and another jacking bearing mechanism 195 is disposed on the support 1913 to support another air inflation shaft 150.

The jacking bearing mechanism 195 comprises a sliding base 197, a second linear guide rail 198 and a bearing seat body 199, wherein the sliding base 197 is arranged on the traverse guide rail 1911 in a sliding manner, the second linear guide rail 198 is arranged on the sliding base 197, the bearing seat body 199 is arranged on the second linear guide rail 198 in a sliding manner, 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 the extending directions extend along the front-back direction, when the unwinding deviation correction is performed, the rectangular welding frame 175 on the first linear guide 177 and the bearing seat 199 on the second linear guide 198 synchronously move front and back, so that the air expansion shaft 150 can move back and forth under the condition of keeping the support, and the deviation correction operation is facilitated.

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

It should be noted that the jacking driving member 1993 is a jacking cylinder, a cylinder body of the cylinder is fixed on the bottom plate 1991, and a piston rod of the cylinder is connected with 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 nylon sleeve is fitted over the rolling bearing 1999, and the nylon sleeve does not slip off, so that the bearing capacity can be further improved.

It should be noted that, when the upper pole piece is rolled, the transverse moving driving member 193 drives the jacking bearing mechanism 195 to slide along the transverse moving guide rail 1911, so as to avoid the feeding trolley, after the feeding is completed, the air expansion shaft 150 is expanded, the jacking bearing mechanism 195 returns to the position below the air expansion shaft 150 through the transverse moving driving member 193, and meanwhile, the positioning member 192 extends out to position the jacking bearing mechanism 195. After the positioning is finished, the jacking driving piece 1993 jacks upwards, so that the rolling bearing 1999 is in rolling contact with the outer circle of the air expansion shaft 150 to finish the supporting action. After the supporting action is completed, the servo motor 133 at the first supporting structure 170 starts to work, and decelerates through the speed reducer 135 and then through the synchronous belt 137, so as to drive the air expansion shaft 150 to rotate.

In summary, the unwinding device 100 provided in this embodiment arranges the unwinding shaft bearing 173 on the square tube of the frame 110, so as to greatly improve the overall bearing capacity, avoid the transmission of force between the inflatable shaft 150 and the vertical plate 111, prevent the vertical plate 111 from deforming, improve the installation accuracy of the roller passing device, and meanwhile, the jacking bearing mechanism 195 in the second supporting structure 190 can move horizontally and can be positioned, thereby greatly facilitating the feeding of the feeding trolley, realizing the supplement of the bearing capacity by arranging the second supporting structure 190, and further improving the bearing capacity.

Second embodiment

The embodiment provides a lamination device, which comprises an unwinding device 100, a deviation correcting device and a lamination device, wherein the basic structure and principle of the unwinding device 100 and the generated technical effects are the same as those of the first embodiment, and for the sake of brief description, reference may be made to corresponding contents in the first embodiment for parts that are not mentioned in the embodiment.

Unwinding device 100 includes frame 110, drive assembly 130, inflatable shaft 150 and first bearing structure 170, is provided with riser 111 on the frame 110, and first bearing structure 170 sets up on frame 110, and inflatable shaft 150 rotationally sets up on first bearing structure 170 to pass riser 111 and outwards stretch out, drive assembly 130 sets up on first bearing structure 170 and is connected with inflatable shaft 150 transmission, is used for driving inflatable shaft 150 to rotate.

Unwinding device 100 is used for loading the pole piece coil stock, and deviation correcting device and lamination device set up on riser 111, and wherein deviation correcting device is used for rectifying to the action of unreeling, and the lamination device is used for carrying out the lamination operation to the pole piece after the cutting.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in 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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