CN219708603U

CN219708603U - Sheet winding mechanism

Info

Publication number: CN219708603U
Application number: CN202321118787.2U
Authority: CN
Inventors: 蔡健伟; 蒋达生
Original assignee: Guangdong Jinxin Machinery Co ltd
Current assignee: Guangdong Jinxin Machinery Co ltd
Priority date: 2023-05-11
Filing date: 2023-05-11
Publication date: 2023-09-19
Anticipated expiration: 2033-05-11

Abstract

The utility model relates to a sheet winding mechanism, which comprises a frame, a supporting mechanism, a winding shaft and a power driving device, wherein the supporting mechanism is arranged on the frame; the supporting mechanism comprises two supporting rotating assemblies which are arranged in a bilateral symmetry way, each supporting rotating assembly comprises a bearing seat, a rotating shaft, a supporting block and a locking disc, the rotating shaft is rotatably arranged on the bearing seat and extends leftwards and rightwards, the supporting block is fixed on the first end part of the rotating shaft, and the top of the supporting block is provided with a clamping groove which can be matched with a shaft head of the winding shaft in a clamping way; the two shaft heads of the winding shaft are respectively positioned in the corresponding clamping grooves; the locking disc is sleeved outside the supporting block through the limiting through hole and corresponds to the clamping groove in position, and the lower part of the locking disc is rotatably connected with the lower part of the supporting block; the locking disc is provided with a locking mechanism for locking and fixing the winding shaft head on the supporting block; one of the rotary shafts for supporting the rotary assembly is connected with the power driving device in a transmission way. The sheet winding mechanism can conveniently mount and dismount the winding shaft, and is beneficial to improving the roll changing operation efficiency.

Description

Sheet winding mechanism

Technical Field

The utility model relates to a strip winding device, in particular to a sheet winding mechanism.

Background

After the sheet is formed into a sheet by a sheet machine, it is generally necessary for a sheet winding mechanism to wind the sheet with a winding shaft to form a sheet roll, and then transfer the wound sheet roll to other equipment (such as a thermoforming machine) for subsequent processing. In the processing process of the sheet, when the sheet roll on the rolling shaft reaches a preset rolling radius, the winding drum with the sheet roll needs to be taken down from the rolling shaft, and then an empty winding drum is mounted on the rolling shaft so as to facilitate the continuous rolling work.

The utility model provides a current sheet coiling mechanism, including the rolling axle and be located the rolling axle both ends and be fixed in the supporting mechanism in the frame, two spindle heads of rolling axle have the transversal positioning end that personally submits the rectangle, and reel demountable installation is on the rolling axle, and supporting mechanism is for having the chuck of joint face and the transmission shaft that is located the joint face back, is equipped with the constant head tank that the cross section is also rectangle on the joint face of chuck, and this constant head tank and the positioning end looks joint of rolling axle, the transmission shaft of chuck is connected with the pivot of motor. When the machine works, the motor drives the chuck to rotate, and the chuck drives the winding shaft and the winding drum on the winding shaft to rotate together, so that the sheet manufactured by the sheet machine is wound to form a sheet roll. However, when the roll of sheet material formed on the winding shaft reaches the preset diameter and needs to be replaced, because the interval between the two chucks of the supporting mechanism is fixed, the winding shaft needs to be translated in the process of disassembling the winding shaft so that the shaft head of the winding shaft is separated from the positioning groove on the chuck, and the weight of the sheet material on the winding shaft is heavier, which can lead to complicated and laborious disassembly process of the winding shaft by staff, is inconvenient for carrying out roll replacement operation, and easily causes waste of production time, thereby reducing production efficiency.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the sheet winding mechanism, which can conveniently mount and dismount the winding shaft and is beneficial to improving the efficiency of the roll changing operation. The technical scheme adopted is as follows:

the utility model provides a sheet winding mechanism, includes frame, supporting mechanism, take-up spool and power drive arrangement, and power drive arrangement installs in the frame, its characterized in that: the supporting mechanism comprises two supporting rotating assemblies which are arranged in a bilateral symmetry mode, the supporting rotating assemblies comprise bearing seats, rotating shafts, supporting blocks and locking discs, the bearing seats are arranged on the machine frame, the rotating shafts are rotatably arranged on the bearing seats and move left and right, the supporting blocks are fixed on first end parts of the rotating shafts, and clamping grooves which can be matched with shaft heads of the winding shafts in a clamping mode are formed in the tops of the supporting blocks; the winding shaft is positioned between the two supporting rotating assemblies, and two shaft heads of the winding shaft are respectively positioned in corresponding clamping grooves; the locking disc is provided with a limiting through hole, the locking disc is sleeved outside the supporting block through the limiting through hole and corresponds to the clamping groove in position, the lower part of the locking disc is rotatably connected with the lower part of the supporting block, and the rotating axis of the locking disc is perpendicular to the axis of the rotating shaft; the locking disc is provided with a locking mechanism for locking and fixing the winding shaft head on the supporting block; one of the rotary shafts supporting the rotary assembly is in transmission connection with the power driving device.

Typically, the cross-sectional shape of the snap-fit groove matches the stub shaft of the take-up spool to ensure power transfer between the spindle supporting the rotating assembly and the take-up spool. The cross-sectional shape of the stub shaft of the take-up spool may be polygonal, oval or other shapes other than circular.

The lower part of the locking disc is rotatably connected with the lower part of the supporting block, and generally, one pin hole is formed below a limiting through hole of the locking disc, the other pin hole is formed below a clamping groove of the supporting block, and the two pin holes are connected through pins.

When the device works, the power driving device drives the corresponding rotating shaft of the supporting rotating assembly to rotate, and the rolling shaft and the winding drum on the rolling shaft are driven to rotate together through the supporting blocks of the two supporting rotating assemblies, so that sheets manufactured by a sheet machine are rolled to form a sheet roll. When the sheet roll on the winding shaft reaches the preset diameter and needs to be changed, the locking mechanisms of the two supporting rotating assemblies are firstly released, so that the shaft heads of the winding shaft are separated from the locking disc, the locking disc and the rotating axis of the supporting block swing towards the bearing seat, the limiting through holes of the locking disc are separated from the corresponding clamping grooves, the notch of the clamping grooves is not shielded, and the two shaft heads of the winding shaft can be conveniently taken out from the two clamping grooves, so that the winding shaft is detached; after a new empty reel (or another winding shaft with an empty reel) is replaced, two shaft heads of the winding shaft provided with the empty reel are respectively placed in clamping grooves on two supporting blocks and are matched in a clamping mode, then the locking coils of the two supporting rotating assemblies swing back to the bearing seat with the rotating axes of the supporting blocks, so that the limiting through holes of the locking plates are matched with the clamping grooves (the edges of the limiting through holes reach the notch of the clamping grooves to limit the shaft heads of the winding shaft at the moment), and the locking mechanisms are used for locking and fixing the positions of the locking plates on the supporting blocks, so that the connection between the two shaft heads of the winding shaft and the two supporting rotating assemblies is achieved, the winding shaft replacement is convenient and quick to install and detach, the winding operation efficiency can be improved, and the labor intensity of workers is reduced.

As a preferable scheme of the utility model, the supporting block is provided with a limiting inclined plane matched with the side surface of the locking disc, which is close to the bearing seat. When the locking coil and the rotation axis of the supporting block swing towards the bearing seat, the limiting inclined plane can play a limiting role on the locking disc, and the locking disc is prevented from directly colliding with the bearing seat to cause damage of parts.

As a preferable scheme of the utility model, the locking mechanism comprises at least one locking screw hole and at least one locking bolt, each locking through hole is arranged on the locking disc and communicated with the limiting through holes, the locking bolts and the locking screw holes are the same in number and correspond to each other one by one, and the locking bolts are arranged in the corresponding locking screw holes. When the winding shaft head is locked and fixed on the supporting block by the locking mechanism, the screw rods of the locking bolts can move towards the limiting through holes along the corresponding locking screw holes respectively by screwing the locking bolts, so that the tail ends of the screw rods of the locking bolts extend into the inner sides of the limiting through holes and are in close contact with the winding shaft head, and the winding shaft head is locked and fixed on the supporting block.

As a further preferable scheme of the utility model, the shaft head of the winding shaft is provided with at least one hole groove, and the hole grooves are in same number and one-to-one correspondence with the locking bolts. The slot may be a threaded hole or a recess that mates with the shank end of the lock bolt. The end of the screw rod of the corresponding locking bolt can be inserted into each hole groove, so that the locking and fixing effect of each locking bolt on the winding shaft head can be improved.

As a further preferable scheme of the utility model, the locking mechanism comprises two locking screw holes which are symmetrically arranged at two sides of the limiting through hole. Therefore, the acting force applied by the locking bolts in the two locking screw holes to the supporting block or the winding shaft head is more symmetrical and uniform, and the locking and fixing effects of the locking mechanism on the locking disc can be improved.

As a preferable scheme of the utility model, the stand comprises a fixed bracket and a winding bracket, wherein the winding bracket is arranged on one side of the fixed bracket, and a plurality of wheels are arranged at the bottom of the winding bracket; the two supporting and rotating assemblies are both arranged on the winding bracket; the power driving device comprises a winding motor, a transmission mechanism and a transmission shaft, wherein the transmission shaft is rotatably arranged on the fixed support and moves left and right; the transmission shaft is detachably connected with one of the rotating shafts supporting the rotating assembly through a coupler. The fixing bracket may be fixedly installed at the rear side of the sheet production apparatus. When the sheet material rolling mechanism is arranged, the rolling bracket is moved to one side of the fixed bracket through each wheel, and the axis of a rotating shaft of one supporting rotating assembly is aligned with the axis of the transmission shaft; and then the transmission shaft is connected with the rotating shaft through a coupling, so that the installation of the sheet winding mechanism can be completed. And then the rolling can be started, and the rolling driving device drives the transmission shaft to rotate during rolling, and drives the rolling shaft to rotate through the coupler and the two supporting rotating assemblies, so that the sheet manufactured by the sheet production equipment is rolled. After the rolling is finished, the rotating shaft supporting the rotating assembly is separated from the coupler, the rolling support and the sheet roll on the rolling support are moved to other equipment (such as a thermoforming machine) through wheels, and the rolling shaft of the rolling support can be used as an unreeling device to release the sheet for subsequent processing. The winding shaft on the winding bracket is adopted for winding and unreeling, so that the processes of unloading and loading the sheet rolls are omitted, and the winding shaft is more convenient and labor-saving in moving, thereby being beneficial to reducing the labor cost and improving the working efficiency; meanwhile, the situation that the surface of the sheet roll is damaged in the carrying process can be avoided, and the quality of the sheet is guaranteed.

As a further preferable scheme of the utility model, two ends of the coupler are respectively provided with a plug bush, and one end of a rotating shaft of the supporting rotating assembly and one end of a transmission shaft are provided with plug blocks which can be in plug fit with the plug bushes. Therefore, the rotating shaft, the transmission shaft and the coupler can be quickly connected together or detached through the plug-in fit between the plug bush and the plug block. Typically, the cavity of the insert matches the cross-sectional shape and size of the insert, which may be rectangular, polygonal, oval or other non-circular shape.

As a further preferred embodiment of the utility model, the insert is connected to the end of the coupling by a universal joint. When axiality errors occur between the axis of the transmission shaft and the axis of the rotating shaft, the universal energy can enable the plug bush and the plug block to be connected smoothly, and therefore the transmission shaft and the rotating shaft can be connected together smoothly.

As a further preferable scheme of the utility model, the transmission mechanism comprises a driving gear and a driven gear, wherein the driving gear is arranged on the output shaft of the winding motor, and the driven gear is arranged on the transmission shaft and meshed with the driving gear. When the winding motor works, the winding motor drives the driving gear to rotate, and the driven gear drives the transmission shaft to rotate.

The transmission mechanism can also adopt a reduction gear set, a chain transmission mechanism or a belt transmission mechanism and the like.

As a further preferable scheme of the utility model, the rolling bracket comprises a base and two supporting frames, wherein the two supporting frames are arranged on the upper side of the base and are arranged side by side left and right, and a plurality of wheels are arranged on the lower side of the base; the rotating shafts of the two supporting rotating assemblies are respectively rotatably arranged at the tops of the two supporting frames. By adopting the structure, the space capable of accommodating the sheet roll can be vacated between the two supporting frames, the maximum rolling radius which can be achieved by the sheet roll formed after rolling is not limited, and the preset rolling radius of the sheet rolling mechanism can be properly increased, so that the sheet roll formed by final rolling is enlarged, and the rolling efficiency is improved.

Compared with the prior art, the utility model has the following advantages:

the sheet winding mechanism can conveniently assemble and disassemble the winding shaft, improves the efficiency of the reel changing operation and reduces the labor intensity of workers.

Drawings

Fig. 1 is a schematic structural view of a sheet winding mechanism according to a preferred embodiment of the present utility model.

Fig. 2 is a schematic view of the structure of the support rotary assembly (locking discs not shown) in a preferred embodiment of the utility model.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a section A-A of fig. 2.

Fig. 5 is a schematic view showing the structure of a locking disk in a preferred embodiment of the present utility model.

Fig. 6 is a B-B cross-sectional view of fig. 5.

Detailed Description

As shown in fig. 1-6, the sheet winding mechanism comprises a frame 1, a supporting mechanism 2, a winding shaft 3 and a power driving device 4, wherein the power driving device 4 is installed on the frame 1, the supporting mechanism 2 comprises two supporting rotating assemblies 21 which are symmetrically arranged left and right, each supporting rotating assembly 21 comprises a bearing seat 211, a rotating shaft 212, a supporting block 213 and a locking disc 214, the bearing seat 211 is installed on the frame 1, the rotating shaft 212 is rotatably installed on the bearing seat 211 and extends left and right, the supporting block 213 is fixed on a first end part of the rotating shaft 212, and a clamping groove 2131 which can be matched with a shaft head 31 of the winding shaft 3 in a clamping way is formed in the top of the supporting block 213; the winding shaft 3 is positioned between the two supporting rotating assemblies 21, and the two shaft heads 31 of the winding shaft 3 are respectively positioned in the corresponding clamping grooves 2131; the locking disc 214 is provided with a limiting through hole 2141, the locking disc 214 is sleeved outside the supporting block 213 through the limiting through hole 2141 and corresponds to the clamping groove 2131 in position, the lower part of the locking disc 214 is rotatably connected with the lower part of the supporting block 213, and the rotation axis of the locking disc 214 is perpendicular to the axis of the rotating shaft 212; the locking disc 214 is provided with a locking mechanism 215 for locking and fixing the shaft head 31 of the winding shaft 3 on the supporting block 213; one of the shafts 212 supporting the rotating assembly 21 is in driving connection with the power driving device 4.

In the present embodiment, the cross-sectional shape of the spindle head 31 of the take-up spindle 3 is rectangular; the engagement groove 2131 mates with the stub shaft 31 of the take-up shaft 3 to ensure power transfer between the shaft 212 supporting the rotating assembly 21 and the take-up shaft 3.

In this embodiment, the lower portion of locking disc 214 is rotatably coupled to the lower portion of support block 213 by two pins 216; two first pin holes 2142 are formed below the limiting through hole 2141 of the locking disc 214, two second pin holes 2143 located on the same axis are formed below the clamping groove 2131 of the supporting block 213, the two second pin holes 2143 are in one-to-one correspondence with the two first pin holes 2142, and the pin 216 is located in the corresponding first pin holes 2142 and second pin holes 2143.

In this embodiment, the support block 213 is provided with a stop ramp 2132 which mates with the side of the locking plate 214 adjacent the bearing seat 211. When the locking disc 214 swings around the rotation axis of the locking disc 214 and the supporting block 213 towards the bearing seat 211, the limiting inclined surface 2132 can limit the locking disc 214, so that the locking disc 214 is prevented from directly colliding with the bearing seat 211 to damage parts.

In this embodiment, the locking mechanism 215 includes two locking screw holes 2151 and two locking bolts (not shown), the two locking screw holes 2151 are all disposed on the locking disc 214, and the two locking screw holes 2151 are respectively located at the left and right sides of the limiting through hole 2141 and are communicated with the limiting through hole 2141; the two locking bolts are in one-to-one correspondence with the two locking screw holes 2151, and the locking bolts are installed in the corresponding locking screw holes 2151; the shaft head 31 of the winding shaft 3 is provided with two hole grooves (not shown) into which the screw ends of the two locking bolts are inserted. When the locking mechanism 215 is required to lock and fix the shaft head 31 of the winding shaft 3 on the supporting block 213, the screws of the two locking bolts can be respectively moved towards the limiting through hole 2141 along the corresponding locking screw holes 2151 by screwing each locking bolt, so that the tail ends of the screws of the two locking bolts extend into the inner side of the limiting through hole 2141 and are inserted into the corresponding hole grooves, thereby realizing the locking and fixing of the shaft head 31 of the winding shaft 3 on the supporting block 213.

In this embodiment, the stand 1 includes a fixing bracket 101 and a winding bracket 102, the winding bracket is disposed on one side of the fixing bracket 101, and a plurality of wheels 1021 are mounted on the bottom of the winding bracket 102; both supporting and rotating assemblies 21 are mounted on the winding bracket 102; the power driving device 4 comprises a winding motor 41, a transmission shaft 42, a driving gear 43 and a driven gear 44, wherein the transmission shaft 42 is rotatably arranged on the fixed support 101 and extends left and right, the winding motor 41 is arranged on the fixed support 101, the driving gear 43 is arranged on an output shaft of the winding motor 41, and the driven gear 44 is arranged on the transmission shaft 42 and meshed with the driving gear 43; the transmission shaft 42 is detachably connected with the rotating shaft 212 of one supporting rotating assembly 21 through the coupler 5, two ends of the coupler 5 are respectively provided with a plug bush 51, and one end of the rotating shaft 212 of the supporting rotating assembly 21 and one end of the transmission shaft 42 are provided with plug blocks 52 which can be in plug fit with the plug bush 51. The cross-sectional shape of the insert 52 is rectangular, and the cavity of the insert 51 matches the cross-sectional shape and size of the insert 52. The fixing bracket 101 may be fixedly installed at the rear side of the sheet production apparatus. When the sheet winding mechanism is installed, the winding bracket 102 is moved to one side of the fixed bracket 101 by each wheel 1021, and the axis of the rotating shaft 212 of one supporting rotating assembly 21 is aligned with the axis of the transmission shaft 42; and then the transmission shaft 42 and the rotating shaft 212 are connected together through the coupler 5, so that the installation of the sheet winding mechanism can be completed. Then, the winding can be started, the winding motor drives the driving gear 43 to rotate during winding, the driven gear 44 drives the transmission shaft 42 to rotate, and the winding shaft 3 is driven to rotate through the coupler 5 and the two supporting rotating assemblies 21, so that the sheet manufactured by the sheet production equipment is wound. After the winding is completed, the rotating shaft 212 supporting the rotating assembly 21 is separated from the coupling 5, and then the winding bracket 102 and the sheet roll thereon are moved to other equipment (such as a thermoforming machine) through the wheels 1021, and the winding shaft 3 of the winding bracket 102 can be used as an unreeling device to release the sheet for subsequent processing. The winding shaft 3 on the winding bracket 102 is adopted for winding and unreeling, so that the processes of unloading and loading the sheet rolls are omitted, and the sheet rolls are more convenient and labor-saving in moving, thereby being beneficial to reducing the labor cost and improving the working efficiency; meanwhile, the situation that the surface of the sheet roll is damaged in the carrying process can be avoided, and the quality of the sheet is guaranteed.

In the present exemplary embodiment, the two bushings 51 are each connected to the respective end of the coupling 5 by a universal joint 53. When the coaxiality error occurs between the axis of the transmission shaft 42 and the axis of the rotating shaft 212, the universal joint 53 enables the plug bush 51 and the plug block 52 to be smoothly plugged, so that the transmission shaft 42 and the rotating shaft 212 are ensured to be smoothly connected.

In this embodiment, the winding bracket 102 includes a base 1022 and two supporting frames 1023, the two supporting frames 1023 are both installed on the upper side of the base 1022 and arranged side by side left and right, and a plurality of wheels 1021 are installed on the lower side of the base 1022; the two shafts 212 supporting the rotating assemblies 21 are rotatably mounted on top of the two supporting frames 1023, respectively. By adopting the structure, the space capable of containing the sheet roll can be vacated between the two supporting frames 1023, the maximum rolling radius which can be achieved by the sheet roll formed after rolling is not limited, and the preset rolling radius of the sheet rolling mechanism can be properly increased, so that the sheet roll formed by final rolling is enlarged, and the rolling efficiency is improved.

The working principle of the sheet winding mechanism is briefly described below:

when the rolling motor 41 works, the driving gear 43 is driven to rotate, the driven gear 44 drives the transmission shaft 42 to rotate, the coupler 5 drives the corresponding rotating shaft 212 and the corresponding supporting block 213 for supporting the rotating assembly 21 to rotate, and the rolling shaft 3 and the winding drum on the rolling shaft are driven to rotate together to roll sheets manufactured by a sheet machine to form a sheet roll. When the roll of the sheet material on the winding shaft 3 reaches the preset diameter and needs to be replaced, the locking mechanisms 215 supporting the rotating assemblies 21 are firstly released (the screw rods of the locking bolts can be respectively moved along the corresponding locking screw holes 2151 back to the limiting through holes 2141 to be separated from the shaft heads 31 of the winding shaft 3) so that the shaft heads 31 of the winding shaft 3 are separated from the locking discs 214, then the locking discs 214 are swung around the pins 216 towards the bearing seat 211 to be contacted with the limiting inclined planes 2132, the limiting through holes 2141 of the locking discs 214 are separated from the corresponding clamping grooves 2131, the notch of the clamping groove 2131 is not blocked, and the two shaft heads 31 of the winding shaft 3 can be conveniently taken out from the two clamping grooves 2131 to realize the disassembly of the winding shaft 3; after the new empty reel is replaced, the two shaft heads 31 of the winding shaft 3 with the empty reel are respectively placed in the clamping grooves 2131 on the two supporting blocks 213 and are in clamping fit, then the locking discs 214 of the two supporting rotating assemblies 21 swing around the pins 216 back to the bearing seats 211, so that the limiting through holes 2141 of the locking discs 214 are matched with the clamping grooves 2131 (at the moment, the edges of the limiting through holes 2141 reach the notch of the clamping grooves 2131 to limit the shaft heads 31 of the winding shaft 3), the positions of the locking discs 214 on the supporting blocks 213 are locked and fixed by the locking mechanism 215 (by screwing the two locking bolts, the screw rods of the two locking bolts respectively move towards the limiting through holes 2141 along the corresponding locking screw holes 2151, the tail ends of the screw rods of the locking bolts extend into the inner sides of the limiting through holes 2141 and are inserted into the corresponding hole grooves, and thus the locking and fixing of the shaft heads 31 of the winding shaft 3 on the supporting blocks 213) are realized, the labor between the two shaft heads 31 of the winding shaft 3 and the two supporting rotating assemblies 21 is conveniently and quickly assembled, the winding and unwinding efficiency is improved, and the winding operation strength is reduced.

In addition, it should be noted that, in the specific embodiments described in the present specification, names of various parts and the like may be different, and all equivalent or simple changes of the structures, features and principles described in the conception of the present utility model are included in the protection scope of the present utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a sheet winding mechanism, includes frame, supporting mechanism, take-up spool and power drive arrangement, and power drive arrangement installs in the frame, its characterized in that: the supporting mechanism comprises two supporting rotating assemblies which are arranged in a bilateral symmetry mode, the supporting rotating assemblies comprise bearing seats, rotating shafts, supporting blocks and locking discs, the bearing seats are arranged on the machine frame, the rotating shafts are rotatably arranged on the bearing seats and move left and right, the supporting blocks are fixed on first end parts of the rotating shafts, and clamping grooves which can be matched with shaft heads of the winding shafts in a clamping mode are formed in the tops of the supporting blocks; the winding shaft is positioned between the two supporting rotating assemblies, and two shaft heads of the winding shaft are respectively positioned in corresponding clamping grooves; the locking disc is provided with a limiting through hole, the locking disc is sleeved outside the supporting block through the limiting through hole and corresponds to the clamping groove in position, the lower part of the locking disc is rotatably connected with the lower part of the supporting block, and the rotating axis of the locking disc is perpendicular to the axis of the rotating shaft; the locking disc is provided with a locking mechanism for locking and fixing the winding shaft head on the supporting block; one of the rotary shafts supporting the rotary assembly is in transmission connection with the power driving device.

2. A sheet take-up mechanism as defined in claim 1 wherein: and the supporting block is provided with a limiting inclined plane matched with the side surface of the locking disc, which is close to the bearing seat.

3. A sheet take-up mechanism as defined in claim 1 wherein: the locking mechanism comprises at least one locking screw hole and at least one locking bolt, each locking through hole is formed in the locking disc and communicated with the limiting through holes, the locking bolts are identical in number with the locking screw holes and correspond to the locking screw holes one by one, and the locking bolts are installed in the corresponding locking screw holes.

4. A sheet take-up mechanism as defined in claim 3 wherein: the axle head of the winding axle is provided with at least one hole groove, and the hole groove is matched with the locking bolts in a one-to-one correspondence mode in the same number.

5. A sheet take-up mechanism as defined in claim 3 wherein: the locking mechanism comprises two locking screw holes which are symmetrically arranged on two sides of the limiting through hole.

6. A sheet winding mechanism according to any one of claims 1 to 5, wherein: the frame comprises a fixed bracket and a winding bracket, the winding bracket is arranged on one side of the fixed bracket, and a plurality of wheels are arranged at the bottom of the winding bracket; the two supporting and rotating assemblies are both arranged on the winding bracket; the power driving device comprises a winding motor, a transmission mechanism and a transmission shaft, wherein the transmission shaft is rotatably arranged on the fixed support and moves left and right; the transmission shaft is detachably connected with one of the rotating shafts supporting the rotating assembly through a coupler.

7. A sheet take-up mechanism as defined in claim 6 wherein: the two ends of the coupler are respectively provided with a plug bush, and one end part of the rotating shaft and one end part of the transmission shaft of the supporting rotating assembly are provided with plug blocks which can be in plug fit with the plug bushes.

8. A sheet take-up mechanism as defined in claim 7 wherein: the plug bush is connected with the end part of the coupler through a universal joint.

9. A sheet take-up mechanism as defined in claim 6 wherein: the transmission mechanism comprises a driving gear and a driven gear, the driving gear is arranged on an output shaft of the winding motor, and the driven gear is arranged on the transmission shaft and meshed with the driving gear.

10. A sheet take-up mechanism as defined in claim 6 wherein: the winding bracket comprises a base and two supporting frames, wherein the two supporting frames are arranged on the upper side of the base and are arranged side by side left and right, and a plurality of wheels are arranged on the lower side of the base; the rotating shafts of the two supporting rotating assemblies are respectively rotatably arranged at the tops of the two supporting frames.